Replace text inputs with dynamic dropdowns, fix cross-series field resolution

Field selectors are now dropdowns populated from the panel's actual
data frames. Each option shows 'fieldName (refId)' so users can
distinguish fields from different queries (A, B, C, etc.).

The selected value uses a 'refId:fieldName' composite key so the
panel can unambiguously resolve the correct field even when multiple
queries return fields with the same name.

Data extraction now searches across ALL series (not just series[0]),
fixing the core bug where selecting a field from query B/C had no
effect because the code only looked at the first data frame.

Field resolution priority:
1. Exact 'refId:fieldName' match (from dropdown selection)
2. Fuzzy match by field name, display name, frame name, or refId
3. For charge field only: fallback to first numeric field ('Auto')

Dropdowns also support allowCustomValue for manual entry and
isClearable to reset.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.config/.cprc.json

@@ -0,0 +1,3 @@
+{
+  "version": "6.1.0"
+}

.config/.prettierrc.js

@@ -0,0 +1,16 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in .config/README.md
+ */
+
+module.exports = {
+  endOfLine: 'auto',
+  printWidth: 120,
+  trailingComma: 'es5',
+  semi: true,
+  jsxSingleQuote: false,
+  singleQuote: true,
+  useTabs: false,
+  tabWidth: 2,
+};

.config/Dockerfile

@@ -0,0 +1,54 @@
+ARG grafana_version=latest
+ARG grafana_image=grafana-enterprise
+
+FROM grafana/${grafana_image}:${grafana_version}
+
+ARG anonymous_auth_enabled=true
+ARG development=false
+ARG TARGETARCH
+
+
+ENV DEV "${development}"
+
+# Make it as simple as possible to access the grafana instance for development purposes
+# Do NOT enable these settings in a public facing / production grafana instance
+ENV GF_AUTH_ANONYMOUS_ORG_ROLE "Admin"
+ENV GF_AUTH_ANONYMOUS_ENABLED "${anonymous_auth_enabled}"
+ENV GF_AUTH_BASIC_ENABLED "false"
+# Set development mode so plugins can be loaded without the need to sign
+ENV GF_DEFAULT_APP_MODE "development"
+
+
+LABEL maintainer="Grafana Labs <hello@grafana.com>"
+
+ENV GF_PATHS_HOME="/usr/share/grafana"
+WORKDIR $GF_PATHS_HOME
+
+USER root
+
+# Installing supervisor and inotify-tools
+RUN if [ "${development}" = "true" ]; then \
+    if grep -i -q alpine /etc/issue; then \
+    apk add supervisor inotify-tools git; \
+    elif grep -i -q ubuntu /etc/issue; then \
+    DEBIAN_FRONTEND=noninteractive && \
+    apt-get update && \
+    apt-get install -y supervisor inotify-tools git && \
+    rm -rf /var/lib/apt/lists/*; \
+    else \
+    echo 'ERROR: Unsupported base image' && /bin/false; \
+    fi \
+    fi
+
+COPY supervisord/supervisord.conf /etc/supervisor.d/supervisord.ini
+COPY supervisord/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+
+
+
+# Inject livereload script into grafana index.html
+RUN sed -i 's|</body>|<script src="http://localhost:35729/livereload.js"></script></body>|g' /usr/share/grafana/public/views/index.html
+
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]

.config/README.md

@@ -0,0 +1,176 @@
+# Default build configuration by Grafana
+
+**This is an auto-generated directory and is not intended to be changed! ⚠️**
+
+The `.config/` directory holds basic configuration for the different tools
+that are used to develop, test and build the project. In order to make it updates easier we ask you to
+not edit files in this folder to extend configuration.
+
+## How to extend the basic configs?
+
+Bear in mind that you are doing it at your own risk, and that extending any of the basic configuration can lead
+to issues around working with the project.
+
+### Extending the ESLint config
+
+Edit the `eslint.config.mjs` file in the project root to extend the ESLint configuration. The following example disables deprecation notices for source files.
+
+**Example:**
+
+```javascript
+import { defineConfig } from 'eslint/config';
+import baseConfig from './.config/eslint.config.mjs';
+
+export default defineConfig([
+  {
+    ignores: [
+      //...
+    ],
+  },
+  ...baseConfig,
+  {
+    files: ['src/**/*.{ts,tsx}'],
+    rules: {
+      '@typescript-eslint/no-deprecated': 'off',
+    },
+  },
+]);
+```
+
+---
+
+### Extending the Prettier config
+
+Edit the `.prettierrc.js` file in the project root in order to extend the Prettier configuration.
+
+**Example:**
+
+```javascript
+module.exports = {
+  // Prettier configuration provided by Grafana scaffolding
+  ...require('./.config/.prettierrc.js'),
+
+  semi: false,
+};
+```
+
+---
+
+### Extending the Jest config
+
+There are two configuration in the project root that belong to Jest: `jest-setup.js` and `jest.config.js`.
+
+**`jest-setup.js`:** A file that is run before each test file in the suite is executed. We are using it to
+set up the Jest DOM for the testing library and to apply some polyfills. ([link to Jest docs](https://jestjs.io/docs/configuration#setupfilesafterenv-array))
+
+**`jest.config.js`:** The main Jest configuration file that extends the Grafana recommended setup. ([link to Jest docs](https://jestjs.io/docs/configuration))
+
+#### ESM errors with Jest
+
+A common issue with the current jest config involves importing an npm package that only offers an ESM build. These packages cause jest to error with `SyntaxError: Cannot use import statement outside a module`. To work around this, we provide a list of known packages to pass to the `[transformIgnorePatterns](https://jestjs.io/docs/configuration#transformignorepatterns-arraystring)` jest configuration property. If need be, this can be extended in the following way:
+
+```javascript
+process.env.TZ = 'UTC';
+const { grafanaESModules, nodeModulesToTransform } = require('./config/jest/utils');
+
+module.exports = {
+  // Jest configuration provided by Grafana
+  ...require('./.config/jest.config'),
+  // Inform jest to only transform specific node_module packages.
+  transformIgnorePatterns: [nodeModulesToTransform([...grafanaESModules, 'packageName'])],
+};
+```
+
+---
+
+### Extending the TypeScript config
+
+Edit the `tsconfig.json` file in the project root in order to extend the TypeScript configuration.
+
+**Example:**
+
+```json
+{
+  "extends": "./.config/tsconfig.json",
+  "compilerOptions": {
+    "preserveConstEnums": true
+  }
+}
+```
+
+---
+
+### Extending the Webpack config
+
+Follow these steps to extend the basic Webpack configuration that lives under `.config/`:
+
+#### 1. Create a new Webpack configuration file
+
+Create a new config file that is going to extend the basic one provided by Grafana.
+It can live in the project root, e.g. `webpack.config.ts`.
+
+#### 2. Merge the basic config provided by Grafana and your custom setup
+
+We are going to use [`webpack-merge`](https://github.com/survivejs/webpack-merge) for this.
+
+```typescript
+// webpack.config.ts
+import type { Configuration } from 'webpack';
+import { merge } from 'webpack-merge';
+import grafanaConfig, { type Env } from './.config/webpack/webpack.config';
+
+const config = async (env: Env): Promise<Configuration> => {
+  const baseConfig = await grafanaConfig(env);
+
+  return merge(baseConfig, {
+    // Add custom config here...
+    output: {
+      asyncChunks: true,
+    },
+  });
+};
+
+export default config;
+```
+
+#### 3. Update the `package.json` to use the new Webpack config
+
+We need to update the `scripts` in the `package.json` to use the extended Webpack configuration.
+
+**Update for `build`:**
+
+```diff
+-"build": "webpack -c ./.config/webpack/webpack.config.ts --env production",
++"build": "webpack -c ./webpack.config.ts --env production",
+```
+
+**Update for `dev`:**
+
+```diff
+-"dev": "webpack -w -c ./.config/webpack/webpack.config.ts --env development",
++"dev": "webpack -w -c ./webpack.config.ts --env development",
+```
+
+### Configure grafana image to use when running docker
+
+By default, `grafana-enterprise` will be used as the docker image for all docker related commands. If you want to override this behavior, simply alter the `docker-compose.yaml` by adding the following build arg `grafana_image`.
+
+**Example:**
+
+```yaml
+version: '3.7'
+
+services:
+  grafana:
+    extends:
+      file: .config/docker-compose-base.yaml
+      service: grafana
+    build:
+      args:
+        grafana_version: ${GRAFANA_VERSION:-9.1.2}
+        grafana_image: ${GRAFANA_IMAGE:-grafana}
+```
+
+In this example, we assign the environment variable `GRAFANA_IMAGE` to the build arg `grafana_image` with a default value of `grafana`. This will allow you to set the value while running the docker compose commands, which might be convenient in some scenarios.
+
+---

.config/bundler/externals.ts

@@ -0,0 +1,43 @@
+import type { Configuration, ExternalItemFunctionData } from 'webpack';
+
+type ExternalsType = Configuration['externals'];
+
+export const externals: ExternalsType = [
+  // Required for dynamic publicPath resolution
+  { 'amd-module': 'module' },
+  'lodash',
+  'jquery',
+  'moment',
+  'slate',
+  'emotion',
+  '@emotion/react',
+  '@emotion/css',
+  'prismjs',
+  'slate-plain-serializer',
+  '@grafana/slate-react',
+  'react',
+  'react-dom',
+  'react-redux',
+  'redux',
+  'rxjs',
+  'i18next',
+  'react-router',
+  'd3',
+  'angular',
+  /^@grafana\/ui/i,
+  /^@grafana\/runtime/i,
+  /^@grafana\/data/i,
+
+  // Mark legacy SDK imports as external if their name starts with the "grafana/" prefix
+  ({ request }: ExternalItemFunctionData, callback: (error?: Error, result?: string) => void) => {
+    const prefix = 'grafana/';
+    const hasPrefix = (request: string) => request.indexOf(prefix) === 0;
+    const stripPrefix = (request: string) => request.slice(prefix.length);
+
+    if (request && hasPrefix(request)) {
+      return callback(undefined, stripPrefix(request));
+    }
+
+    callback();
+  },
+];

.config/docker-compose-base.yaml

@@ -0,0 +1,25 @@
+services:
+  grafana:
+    user: root
+    container_name: 'andydixon-chargevizbattery-panel'
+
+    build:
+      context: .
+      args:
+        grafana_image: ${GRAFANA_IMAGE:-grafana-enterprise}
+        grafana_version: ${GRAFANA_VERSION:-12.2.0}
+        development: ${DEVELOPMENT:-false}
+        anonymous_auth_enabled: ${ANONYMOUS_AUTH_ENABLED:-true}
+    ports:
+      - 3000:3000/tcp
+    volumes:
+      - ../dist:/var/lib/grafana/plugins/andydixon-chargevizbattery-panel
+      - ../provisioning:/etc/grafana/provisioning
+      - ..:/root/andydixon-chargevizbattery-panel
+
+    environment:
+      NODE_ENV: development
+      GF_LOG_FILTERS: plugin.andydixon-chargevizbattery-panel:debug
+      GF_LOG_LEVEL: debug
+      GF_DATAPROXY_LOGGING: 1
+      GF_PLUGINS_ALLOW_LOADING_UNSIGNED_PLUGINS: andydixon-chargevizbattery-panel

.config/entrypoint.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+if [ "${DEV}" = "false" ]; then
+    echo "Starting test mode"
+    exec /run.sh
+fi
+
+echo "Starting development mode"
+
+if grep -i -q alpine /etc/issue; then
+    exec /usr/bin/supervisord -c /etc/supervisord.conf
+elif grep -i -q ubuntu /etc/issue; then
+    exec /usr/bin/supervisord -c /etc/supervisor/supervisord.conf
+else
+    echo 'ERROR: Unsupported base image'
+    exit 1
+fi
+

.config/eslint.config.mjs

@@ -0,0 +1,38 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in
+ * https://grafana.com/developers/plugin-tools/how-to-guides/extend-configurations#extend-the-eslint-config
+ */
+
+import { defineConfig } from 'eslint/config';
+import grafanaConfig from '@grafana/eslint-config/flat.js';
+
+export default defineConfig([
+  ...grafanaConfig,
+  {
+    rules: {
+      'react/prop-types': 'off',
+    },
+  },
+  {
+    files: ['src/**/*.{ts,tsx}'],
+
+    languageOptions: {
+      parserOptions: {
+        project: './tsconfig.json',
+      },
+    },
+
+    rules: {
+      '@typescript-eslint/no-deprecated': 'warn',
+    },
+  },
+  {
+    files: ['./tests/**/*'],
+
+    rules: {
+      'react-hooks/rules-of-hooks': 'off',
+    },
+  },
+]);

.config/jest-setup.js

@@ -0,0 +1,28 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in
+ * https://grafana.com/developers/plugin-tools/how-to-guides/extend-configurations#extend-the-jest-config
+ */
+
+import '@testing-library/jest-dom';
+import { TextEncoder, TextDecoder } from 'util';
+
+Object.assign(global, { TextDecoder, TextEncoder });
+
+// https://jestjs.io/docs/manual-mocks#mocking-methods-which-are-not-implemented-in-jsdom
+Object.defineProperty(global, 'matchMedia', {
+  writable: true,
+  value: (query) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: jest.fn(), // deprecated
+    removeListener: jest.fn(), // deprecated
+    addEventListener: jest.fn(),
+    removeEventListener: jest.fn(),
+    dispatchEvent: jest.fn(),
+  }),
+});
+
+HTMLCanvasElement.prototype.getContext = () => {};

.config/jest.config.js

@@ -0,0 +1,44 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in
+ * https://grafana.com/developers/plugin-tools/how-to-guides/extend-configurations#extend-the-jest-config
+ */
+
+const path = require('path');
+const { grafanaESModules, nodeModulesToTransform } = require('./jest/utils');
+
+module.exports = {
+  moduleNameMapper: {
+    '\\.(css|scss|sass)$': 'identity-obj-proxy',
+    'react-inlinesvg': path.resolve(__dirname, 'jest', 'mocks', 'react-inlinesvg.tsx'),
+  },
+  modulePaths: ['<rootDir>/src'],
+  setupFilesAfterEnv: ['<rootDir>/jest-setup.js'],
+  testEnvironment: 'jest-environment-jsdom',
+  testMatch: [
+    '<rootDir>/src/**/__tests__/**/*.{js,jsx,ts,tsx}',
+    '<rootDir>/src/**/*.{spec,test,jest}.{js,jsx,ts,tsx}',
+    '<rootDir>/src/**/*.{spec,test,jest}.{js,jsx,ts,tsx}',
+  ],
+  transform: {
+    '^.+\\.(t|j)sx?$': [
+      '@swc/jest',
+      {
+        sourceMaps: 'inline',
+        jsc: {
+          parser: {
+            syntax: 'typescript',
+            tsx: true,
+            decorators: false,
+            dynamicImport: true,
+          },
+        },
+      },
+    ],
+  },
+  // Jest will throw `Cannot use import statement outside module` if it tries to load an
+  // ES module without it being transformed first. ./config/README.md#esm-errors-with-jest
+  transformIgnorePatterns: [nodeModulesToTransform(grafanaESModules)],
+  watchPathIgnorePatterns: ['<rootDir>/node_modules', '<rootDir>/dist'],
+};

.config/jest/mocks/react-inlinesvg.tsx

@@ -0,0 +1,25 @@
+// Due to the grafana/ui Icon component making fetch requests to
+// `/public/img/icon/<icon_name>.svg` we need to mock react-inlinesvg to prevent
+// the failed fetch requests from displaying errors in console.
+
+import React from 'react';
+
+type Callback = (...args: any[]) => void;
+
+export interface StorageItem {
+  content: string;
+  queue: Callback[];
+  status: string;
+}
+
+export const cacheStore: { [key: string]: StorageItem } = Object.create(null);
+
+const SVG_FILE_NAME_REGEX = /(.+)\/(.+)\.svg$/;
+
+const InlineSVG = ({ src }: { src: string }) => {
+  // testId will be the file name without extension (e.g. `public/img/icons/angle-double-down.svg` -> `angle-double-down`)
+  const testId = src.replace(SVG_FILE_NAME_REGEX, '$2');
+  return <svg xmlns="http://www.w3.org/2000/svg" data-testid={testId} viewBox="0 0 24 24" />;
+};
+
+export default InlineSVG;

.config/jest/utils.js

@@ -0,0 +1,37 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in .config/README.md
+ */
+
+/*
+ * This utility function is useful in combination with jest `transformIgnorePatterns` config
+ * to transform specific packages (e.g.ES modules) in a projects node_modules folder.
+ */
+const nodeModulesToTransform = (moduleNames) => `node_modules\/(?!.*(${moduleNames.join('|')})\/.*)`;
+
+// Array of known nested grafana package dependencies that only bundle an ESM version
+const grafanaESModules = [
+  '.pnpm', // Support using pnpm symlinked packages
+  '@grafana/schema',
+  '@wojtekmaj/date-utils',
+  'd3',
+  'd3-color',
+  'd3-force',
+  'd3-interpolate',
+  'd3-scale-chromatic',
+  'get-user-locale',
+  'marked',
+  'memoize',
+  'mimic-function',
+  'ol',
+  'react-calendar',
+  'react-colorful',
+  'rxjs',
+  'uuid',
+];
+
+module.exports = {
+  nodeModulesToTransform,
+  grafanaESModules,
+};

.config/supervisord/supervisord.conf

@@ -0,0 +1,15 @@
+[supervisord]
+nodaemon=true
+user=root
+
+[program:grafana]
+user=root
+directory=/var/lib/grafana
+command=/run.sh
+stdout_logfile=/dev/fd/1
+stdout_logfile_maxbytes=0
+redirect_stderr=true
+killasgroup=true
+stopasgroup=true
+autostart=true
+

.config/tsconfig.json

@@ -0,0 +1,26 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in
+ * https://grafana.com/developers/plugin-tools/how-to-guides/extend-configurations#extend-the-typescript-config
+ */
+{
+  "compilerOptions": {
+    "alwaysStrict": true,
+    "declaration": false,
+    "rootDir": "../src",
+    "baseUrl": "../src",
+    "typeRoots": ["../node_modules/@types"],
+    "resolveJsonModule": true
+  },
+  "ts-node": {
+    "compilerOptions": {
+      "module": "commonjs",
+      "target": "es5",
+      "esModuleInterop": true
+    },
+    "transpileOnly": true
+  },
+  "include": ["../src", "./types"],
+  "extends": "@grafana/tsconfig"
+}

.config/types/bundler-rules.d.ts

@@ -0,0 +1,37 @@
+// Image declarations
+declare module '*.gif' {
+  const src: string;
+  export default src;
+}
+
+declare module '*.jpg' {
+  const src: string;
+  export default src;
+}
+
+declare module '*.jpeg' {
+  const src: string;
+  export default src;
+}
+
+declare module '*.png' {
+  const src: string;
+  export default src;
+}
+
+declare module '*.webp' {
+  const src: string;
+  export default src;
+}
+
+declare module '*.svg' {
+  const src: string;
+  export default src;
+}
+
+// Font declarations
+declare module '*.woff';
+declare module '*.woff2';
+declare module '*.eot';
+declare module '*.ttf';
+declare module '*.otf';

.config/types/webpack-plugins.d.ts

@@ -0,0 +1,83 @@
+declare module 'replace-in-file-webpack-plugin' {
+  import { Compiler, Plugin } from 'webpack';
+
+  interface ReplaceRule {
+    search: string | RegExp;
+    replace: string | ((match: string) => string);
+  }
+
+  interface ReplaceOption {
+    dir?: string;
+    files?: string[];
+    test?: RegExp | RegExp[];
+    rules: ReplaceRule[];
+  }
+
+  class ReplaceInFilePlugin extends Plugin {
+    constructor(options?: ReplaceOption[]);
+    options: ReplaceOption[];
+    apply(compiler: Compiler): void;
+  }
+
+  export = ReplaceInFilePlugin;
+}
+
+declare module 'webpack-livereload-plugin' {
+  import { ServerOptions } from 'https';
+  import { Compiler, Plugin, Stats, Compilation } from 'webpack';
+
+  interface Options extends Pick<ServerOptions, 'cert' | 'key' | 'pfx'> {
+    /**
+     * protocol for livereload `<script>` src attribute value
+     * @default protocol of the page, either `http` or `https`
+     */
+    protocol?: string | undefined;
+    /**
+     * The desired port for the livereload server.
+     * If you define port 0, an available port will be searched for, starting from 35729.
+     * @default 35729
+     */
+    port?: number | undefined;
+    /**
+     * he desired hostname for the appended `<script>` (if present) to point to
+     * @default hostname of the page, like `localhost` or 10.0.2.2
+     */
+    hostname?: string | undefined;
+    /**
+     * livereload `<script>` automatically to `<head>`.
+     * @default false
+     */
+    appendScriptTag?: boolean | undefined;
+    /**
+     * RegExp of files to ignore. Null value means ignore nothing.
+     * It is also possible to define an array and use multiple anymatch patterns
+     */
+    ignore?: RegExp | RegExp[] | null | undefined;
+    /**
+     * amount of milliseconds by which to delay the live reload (in case build takes longer)
+     * @default 0
+     */
+    delay?: number | undefined;
+    /**
+     * create hash for each file source and only notify livereload if hash has changed
+     * @default false
+     */
+    useSourceHash?: boolean | undefined;
+  }
+
+  class LiveReloadPlugin extends Plugin {
+    readonly isRunning: boolean;
+    constructor(options?: Options);
+
+    apply(compiler: Compiler): void;
+
+    start(watching: any, cb: () => void): void;
+    done(stats: Stats): void;
+    failed(): void;
+    autoloadJs(): string;
+    scriptTag(source: string): string;
+    applyCompilation(compilation: Compilation): void;
+  }
+
+  export = LiveReloadPlugin;
+}

.config/webpack/BuildModeWebpackPlugin.ts

@@ -0,0 +1,33 @@
+import webpack, { type Compiler } from 'webpack';
+
+const PLUGIN_NAME = 'BuildModeWebpack';
+
+export class BuildModeWebpackPlugin {
+  apply(compiler: webpack.Compiler) {
+    compiler.hooks.compilation.tap(PLUGIN_NAME, (compilation) => {
+      compilation.hooks.processAssets.tap(
+        {
+          name: PLUGIN_NAME,
+          stage: webpack.Compilation.PROCESS_ASSETS_STAGE_ADDITIONS,
+        },
+        async () => {
+          const assets = compilation.getAssets();
+          for (const asset of assets) {
+            if (asset.name.endsWith('plugin.json')) {
+              const pluginJsonString = asset.source.source().toString();
+              const pluginJsonWithBuildMode = JSON.stringify(
+                {
+                  ...JSON.parse(pluginJsonString),
+                  buildMode: compilation.options.mode,
+                },
+                null,
+                4
+              );
+              compilation.updateAsset(asset.name, new webpack.sources.RawSource(pluginJsonWithBuildMode));
+            }
+          }
+        }
+      );
+    });
+  }
+}

.config/webpack/constants.ts

@@ -0,0 +1,2 @@
+export const SOURCE_DIR = 'src';
+export const DIST_DIR = 'dist';

.config/webpack/utils.ts

@@ -0,0 +1,68 @@
+import fs from 'fs';
+import process from 'process';
+import os from 'os';
+import path from 'path';
+import { glob } from 'glob';
+import { SOURCE_DIR } from './constants.ts';
+
+export function isWSL() {
+  if (process.platform !== 'linux') {
+    return false;
+  }
+
+  if (os.release().toLowerCase().includes('microsoft')) {
+    return true;
+  }
+
+  try {
+    return fs.readFileSync('/proc/version', 'utf8').toLowerCase().includes('microsoft');
+  } catch {
+    return false;
+  }
+}
+
+function loadJson(path: string) {
+  const rawJson = fs.readFileSync(path, 'utf8');
+  return JSON.parse(rawJson);
+}
+
+export function getPackageJson() {
+  return loadJson(path.resolve(process.cwd(), 'package.json'));
+}
+
+export function getPluginJson() {
+  return loadJson(path.resolve(process.cwd(), `${SOURCE_DIR}/plugin.json`));
+}
+
+export function getCPConfigVersion() {
+  const cprcJson = path.resolve(process.cwd(), './.config', '.cprc.json');
+  return fs.existsSync(cprcJson) ? loadJson(cprcJson).version : { version: 'unknown' };
+}
+
+export function hasReadme() {
+  return fs.existsSync(path.resolve(process.cwd(), SOURCE_DIR, 'README.md'));
+}
+
+// Support bundling nested plugins by finding all plugin.json files in src directory
+// then checking for a sibling module.[jt]sx? file.
+export async function getEntries() {
+  const pluginsJson = await glob('**/src/**/plugin.json', { absolute: true });
+
+  const plugins = await Promise.all(
+    pluginsJson.map((pluginJson) => {
+      const folder = path.dirname(pluginJson);
+      return glob(`${folder}/module.{ts,tsx,js,jsx}`, { absolute: true });
+    })
+  );
+
+  return plugins.reduce<Record<string, string>>((result, modules) => {
+    return modules.reduce((innerResult, module) => {
+      const pluginPath = path.dirname(module);
+      const pluginName = path.relative(process.cwd(), pluginPath).replace(/src\/?/i, '');
+      const entryName = pluginName === '' ? 'module' : `${pluginName}/module`;
+
+      innerResult[entryName] = module;
+      return innerResult;
+    }, result);
+  }, {});
+}

.config/webpack/webpack.config.ts

@@ -0,0 +1,247 @@
+/*
+ * ⚠️⚠️⚠️ THIS FILE WAS SCAFFOLDED BY `@grafana/create-plugin`. DO NOT EDIT THIS FILE DIRECTLY. ⚠️⚠️⚠️
+ *
+ * In order to extend the configuration follow the steps in
+ * https://grafana.com/developers/plugin-tools/how-to-guides/extend-configurations#extend-the-webpack-config
+ */
+
+import CopyWebpackPlugin from 'copy-webpack-plugin';
+import ESLintPlugin from 'eslint-webpack-plugin';
+import ForkTsCheckerWebpackPlugin from 'fork-ts-checker-webpack-plugin';
+import path from 'path';
+import ReplaceInFileWebpackPlugin from 'replace-in-file-webpack-plugin';
+import TerserPlugin from 'terser-webpack-plugin';
+import { SubresourceIntegrityPlugin } from 'webpack-subresource-integrity';
+import webpack, { type Configuration } from 'webpack';
+import LiveReloadPlugin from 'webpack-livereload-plugin';
+import VirtualModulesPlugin from 'webpack-virtual-modules';
+
+import { BuildModeWebpackPlugin } from './BuildModeWebpackPlugin.ts';
+import { DIST_DIR, SOURCE_DIR } from './constants.ts';
+import { getCPConfigVersion, getEntries, getPackageJson, getPluginJson, hasReadme, isWSL } from './utils.ts';
+import { externals } from '../bundler/externals.ts';
+
+const pluginJson = getPluginJson();
+const cpVersion = getCPConfigVersion();
+const pluginVersion = getPackageJson().version;
+
+const virtualPublicPath = new VirtualModulesPlugin({
+  'node_modules/grafana-public-path.js': `
+import amdMetaModule from 'amd-module';
+
+__webpack_public_path__ =
+  amdMetaModule && amdMetaModule.uri
+    ? amdMetaModule.uri.slice(0, amdMetaModule.uri.lastIndexOf('/') + 1)
+    : 'public/plugins/${pluginJson.id}/';
+`,
+});
+
+export type Env = {
+  [key: string]: true | string | Env;
+};
+
+const config = async (env: Env): Promise<Configuration> => {
+  const baseConfig: Configuration = {
+    cache: {
+      type: 'filesystem',
+      buildDependencies: {
+        // __filename doesn't work in Node 24
+        config: [path.resolve(process.cwd(), '.config', 'webpack', 'webpack.config.ts')],
+      },
+    },
+
+    context: path.join(process.cwd(), SOURCE_DIR),
+
+    devtool: env.production ? 'source-map' : 'eval-source-map',
+
+    entry: await getEntries(),
+
+    externals,
+
+    // Support WebAssembly according to latest spec - makes WebAssembly module async
+    experiments: {
+      asyncWebAssembly: true,
+    },
+
+    mode: env.production ? 'production' : 'development',
+
+    module: {
+      rules: [
+        // This must come first in the rules array otherwise it breaks sourcemaps.
+        {
+          test: /src\/(?:.*\/)?module\.tsx?$/,
+          use: [
+            {
+              loader: 'imports-loader',
+              options: {
+                imports: `side-effects grafana-public-path`,
+              },
+            },
+          ],
+        },
+        {
+          exclude: /(node_modules)/,
+          test: /\.[tj]sx?$/,
+          use: {
+            loader: 'swc-loader',
+            options: {
+              jsc: {
+                baseUrl: path.resolve(process.cwd(), SOURCE_DIR),
+                target: 'es2015',
+                loose: false,
+                parser: {
+                  syntax: 'typescript',
+                  tsx: true,
+                  decorators: false,
+                  dynamicImport: true,
+                },
+              },
+            },
+          },
+        },
+        {
+          test: /\.css$/,
+          use: ['style-loader', 'css-loader'],
+        },
+        {
+          test: /\.s[ac]ss$/,
+          use: ['style-loader', 'css-loader', 'sass-loader'],
+        },
+        {
+          test: /\.(png|jpe?g|gif|svg)$/,
+          type: 'asset/resource',
+          generator: {
+            filename: Boolean(env.production) ? '[hash][ext]' : '[file]',
+          },
+        },
+        {
+          test: /\.(woff|woff2|eot|ttf|otf)(\?v=\d+\.\d+\.\d+)?$/,
+          type: 'asset/resource',
+          generator: {
+            filename: Boolean(env.production) ? '[hash][ext]' : '[file]',
+          },
+        },
+      ],
+    },
+
+    optimization: {
+      minimize: Boolean(env.production),
+      minimizer: [
+        new TerserPlugin({
+          terserOptions: {
+            format: {
+              comments: (_, { type, value }) => type === 'comment2' && value.trim().startsWith('[create-plugin]'),
+            },
+            compress: {
+              drop_console: ['log', 'info'],
+            },
+          },
+        }),
+      ],
+    },
+
+    output: {
+      clean: {
+        keep: new RegExp(`(.*?_(amd64|arm(64)?)(.exe)?|go_plugin_build_manifest)`),
+      },
+      filename: '[name].js',
+      chunkFilename: env.production ? '[name].js?_cache=[contenthash]' : '[name].js',
+      library: {
+        type: 'amd',
+      },
+      path: path.resolve(process.cwd(), DIST_DIR),
+      publicPath: `public/plugins/${pluginJson.id}/`,
+      uniqueName: pluginJson.id,
+      crossOriginLoading: 'anonymous',
+    },
+
+    plugins: [
+      new BuildModeWebpackPlugin(),
+      virtualPublicPath,
+      // Insert create plugin version information into the bundle
+      new webpack.BannerPlugin({
+        banner: `/* [create-plugin] version: ${cpVersion} */
+          /* [create-plugin] plugin: ${pluginJson.id}@${pluginVersion} */`,
+        raw: true,
+        entryOnly: true,
+      }),
+      new CopyWebpackPlugin({
+        patterns: [
+          // If src/README.md exists use it; otherwise the root README
+          // To `compiler.options.output`
+          { from: hasReadme() ? 'README.md' : '../README.md', to: '.', force: true },
+          { from: 'plugin.json', to: '.' },
+          { from: '../LICENSE', to: '.' },
+          { from: '../CHANGELOG.md', to: '.', force: true },
+          { from: '**/*.json', to: '.' },
+          { from: '**/*.svg', to: '.', noErrorOnMissing: true },
+          { from: '**/*.png', to: '.', noErrorOnMissing: true },
+          { from: '**/*.html', to: '.', noErrorOnMissing: true },
+          { from: 'img/**/*', to: '.', noErrorOnMissing: true },
+          { from: 'libs/**/*', to: '.', noErrorOnMissing: true },
+          { from: 'static/**/*', to: '.', noErrorOnMissing: true },
+          { from: '**/query_help.md', to: '.', noErrorOnMissing: true },
+        ],
+      }),
+      // Replace certain template-variables in the README and plugin.json
+      new ReplaceInFileWebpackPlugin([
+        {
+          dir: DIST_DIR,
+          files: ['plugin.json', 'README.md'],
+          rules: [
+            {
+              search: /\%VERSION\%/g,
+              replace: pluginVersion,
+            },
+            {
+              search: /\%TODAY\%/g,
+              replace: new Date().toISOString().substring(0, 10),
+            },
+            {
+              search: /\%PLUGIN_ID\%/g,
+              replace: pluginJson.id,
+            },
+          ],
+        },
+      ]),
+      new SubresourceIntegrityPlugin({
+        hashFuncNames: ['sha256'],
+      }),
+      ...(env.development
+        ? [
+            new LiveReloadPlugin(),
+            new ForkTsCheckerWebpackPlugin({
+              async: Boolean(env.development),
+              issue: {
+                include: [{ file: '**/*.{ts,tsx}' }],
+              },
+              typescript: { configFile: path.join(process.cwd(), 'tsconfig.json') },
+            }),
+            new ESLintPlugin({
+              extensions: ['.ts', '.tsx'],
+              lintDirtyModulesOnly: Boolean(env.development), // don't lint on start, only lint changed files
+              failOnError: Boolean(env.production),
+            }),
+          ]
+        : []),
+    ],
+
+    resolve: {
+      extensions: ['.js', '.jsx', '.ts', '.tsx'],
+      // handle resolving "rootDir" paths
+      modules: [path.resolve(process.cwd(), 'src'), 'node_modules'],
+      unsafeCache: true,
+    },
+  };
+
+  if (isWSL()) {
+    baseConfig.watchOptions = {
+      poll: 3000,
+      ignored: /node_modules/,
+    };
+  }
+
+  return baseConfig;
+};
+
+export default config;

.cprc.json

@@ -0,0 +1,7 @@
+{
+  "features": {
+    "bundleGrafanaUI": false,
+    "useReactRouterV6": true,
+    "useExperimentalRspack": false
+  }
+}

.github/workflows/bundle-stats.yml

@@ -0,0 +1,27 @@
+name: Bundle Stats
+
+on:
+  workflow_dispatch:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: write
+  pull-requests: write
+  actions: read
+
+jobs:
+  compare:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - uses: grafana/plugin-actions/bundle-size@main # zizmor: ignore[unpinned-uses] provided by grafana

.github/workflows/ci.yml

@@ -0,0 +1,241 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+    branches:
+      - master
+      - main
+
+jobs:
+  build:
+    name: Build, lint and unit tests
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    outputs:
+      plugin-id: ${{ steps.metadata.outputs.plugin-id }}
+      plugin-version: ${{ steps.metadata.outputs.plugin-version }}
+      has-e2e: ${{ steps.check-for-e2e.outputs.has-e2e }}
+      has-backend: ${{ steps.check-for-backend.outputs.has-backend }}
+    env:
+      GRAFANA_ACCESS_POLICY_TOKEN: ${{ secrets.GRAFANA_ACCESS_POLICY_TOKEN }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Setup Node.js environment
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check types
+        run: npm run typecheck
+      - name: Lint
+        run: npm run lint
+      - name: Unit tests
+        run: npm run test:ci
+      - name: Build frontend
+        run: npm run build
+
+      - name: Check for backend
+        id: check-for-backend
+        run: |
+          if [ -f "Magefile.go" ]
+          then
+            echo "has-backend=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Setup Go environment
+        if: steps.check-for-backend.outputs.has-backend == 'true'
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.22'
+
+      - name: Test backend
+        if: steps.check-for-backend.outputs.has-backend == 'true'
+        uses: magefile/mage-action@6f50bbb8ea47d56e62dee92392788acbc8192d0b # v3.1.0
+        with:
+          version: latest
+          args: coverage
+
+      - name: Build backend
+        if: steps.check-for-backend.outputs.has-backend == 'true'
+        uses: magefile/mage-action@6f50bbb8ea47d56e62dee92392788acbc8192d0b # v3.1.0
+        with:
+          version: latest
+          args: buildAll
+
+      - name: Check for E2E
+        id: check-for-e2e
+        run: |
+          if [ -f "playwright.config.ts" ]
+          then
+            echo "has-e2e=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Sign plugin
+        run: npm run sign
+        if: ${{ env.GRAFANA_ACCESS_POLICY_TOKEN != '' }}
+
+      - name: Get plugin metadata
+        id: metadata
+        run: |
+          sudo apt-get install jq
+
+          export GRAFANA_PLUGIN_ID=$(cat dist/plugin.json | jq -r .id)
+          export GRAFANA_PLUGIN_VERSION=$(cat dist/plugin.json | jq -r .info.version)
+          export GRAFANA_PLUGIN_ARTIFACT=${GRAFANA_PLUGIN_ID}-${GRAFANA_PLUGIN_VERSION}.zip
+
+          echo "plugin-id=${GRAFANA_PLUGIN_ID}" >> $GITHUB_OUTPUT
+          echo "plugin-version=${GRAFANA_PLUGIN_VERSION}" >> $GITHUB_OUTPUT
+          echo "archive=${GRAFANA_PLUGIN_ARTIFACT}" >> $GITHUB_OUTPUT
+
+      - name: Package plugin
+        id: package-plugin
+        run: |
+          mv dist ${PLUGIN_ID}
+          zip ${ARCHIVE} ${PLUGIN_ID} -r
+        env:
+          ARCHIVE: ${{ steps.metadata.outputs.archive }}
+          PLUGIN_ID: ${{ steps.metadata.outputs.plugin-id }}
+
+      - name: Check plugin.json
+        run: |
+          docker run --pull=always \
+            -v $PWD/${ARCHIVE}:/archive.zip \
+            grafana/plugin-validator-cli -analyzer=metadatavalid /archive.zip
+        env:
+          ARCHIVE: ${{ steps.metadata.outputs.archive }}
+
+      - name: Archive Build
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ steps.metadata.outputs.plugin-id }}-${{ steps.metadata.outputs.plugin-version }}
+          path: ${{ steps.metadata.outputs.plugin-id }}
+          retention-days: 5
+
+  resolve-versions:
+    name: Resolve e2e images
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    timeout-minutes: 3
+    needs: build
+    if: ${{ needs.build.outputs.has-e2e == 'true' }}
+    outputs:
+      matrix: ${{ steps.resolve-versions.outputs.matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Resolve Grafana E2E versions
+        id: resolve-versions
+        uses: grafana/plugin-actions/e2e-version@main # zizmor: ignore[unpinned-uses] provided by grafana
+
+  playwright-tests:
+    needs: [resolve-versions, build]
+    timeout-minutes: 15
+    permissions:
+      contents: read
+      id-token: write
+      pull-requests: write
+    strategy:
+      fail-fast: false
+      matrix:
+        GRAFANA_IMAGE: ${{fromJson(needs.resolve-versions.outputs.matrix)}}
+    name: e2e test ${{ matrix.GRAFANA_IMAGE.name }}@${{ matrix.GRAFANA_IMAGE.VERSION }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Download plugin
+        uses: actions/download-artifact@v4
+        with:
+          path: dist
+          name: ${{ needs.build.outputs.plugin-id }}-${{ needs.build.outputs.plugin-version }}
+
+      - name: Execute permissions on binary
+        if: needs.build.outputs.has-backend == 'true'
+        run: |
+          chmod +x ./dist/gpx_*
+
+      - name: Setup Node.js environment
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dev dependencies
+        run: npm ci
+
+      - name: Start Grafana
+        run: |
+          docker compose pull
+          ANONYMOUS_AUTH_ENABLED=false DEVELOPMENT=false GRAFANA_VERSION=${{ matrix.GRAFANA_IMAGE.VERSION }} GRAFANA_IMAGE=${{ matrix.GRAFANA_IMAGE.NAME }} docker compose up -d
+
+      - name: Wait for grafana server
+        uses: grafana/plugin-actions/wait-for-grafana@main # zizmor: ignore[unpinned-uses] provided by grafana
+        with:
+          url: http://localhost:3000/login
+
+      - name: Install Playwright Browsers
+        run: npm exec playwright install chromium --with-deps
+
+      - name: Run Playwright tests
+        id: run-tests
+        run: npm run e2e
+
+      - name: Upload e2e test summary
+        uses: grafana/plugin-actions/playwright-gh-pages/upload-report-artifacts@main # zizmor: ignore[unpinned-uses] provided by grafana
+        if: ${{ always() && !cancelled() }}
+        with:
+          upload-report: false
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          test-outcome: ${{ steps.run-tests.outcome }}
+
+      - name: Docker logs
+        if: ${{ always() && steps.run-tests.outcome == 'failure' }}
+        run: |
+          docker logs andydixon-chargevizbattery-panel >& grafana-server.log
+
+      - name: Stop grafana docker
+        run: docker compose down
+
+      # Uncomment this step to upload the server log to Github artifacts. Remember Github artifacts are public on the Internet if the repository is public.
+      # - name: Upload server log
+      #   uses: actions/upload-artifact@v4
+      #   if: ${{ always() && steps.run-tests.outcome == 'failure' }}
+      #   with:
+      #     name: ${{ matrix.GRAFANA_IMAGE.NAME }}-v${{ matrix.GRAFANA_IMAGE.VERSION }}-${{github.run_id}}-server-log
+      #     path: grafana-server.log
+      #     retention-days: 5
+
+  publish-report:
+    if: ${{ always() && !cancelled() }}
+    permissions:
+      contents: write
+      id-token: write
+      pull-requests: write
+    needs: [playwright-tests]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          # required for playwright-gh-pages
+          persist-credentials: true
+      - name: Publish report
+        uses: grafana/plugin-actions/playwright-gh-pages/deploy-report-pages@main # zizmor: ignore[unpinned-uses] provided by grafana
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/cp-update.yml

@@ -0,0 +1,26 @@
+name: Create Plugin Update
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 1 * *' # run once a month on the 1st day
+
+# To use the default github token with the following elevated permissions make sure to check:
+# **Allow GitHub Actions to create and approve pull requests** in https://github.com/ORG_NAME/REPO_NAME/settings/actions.
+# Alternatively create a fine-grained personal access token for your repository with
+# `contents: read and write` and `pull requests: read and write` and pass it to the action.
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: grafana/plugin-actions/create-plugin-update@main # zizmor: ignore[unpinned-uses] provided by grafana
+        # Uncomment to use a fine-grained personal access token instead of default github token
+        # (For more info on how to generate the token see https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/managing-your-personal-access-tokens)
+        # with:
+        # Make sure to save the token in your repository secrets
+        # token: $

.github/workflows/is-compatible.yml

@@ -0,0 +1,37 @@
+name: Latest Grafana API compatibility check
+on: [pull_request]
+
+jobs:
+  compatibilitycheck:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Setup Node.js environment
+        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
+        with:
+          node-version: '22'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build plugin
+        run: npm run build
+
+      - name: Find module.ts or module.tsx
+        id: find-module-ts
+        run: |
+          MODULETS="$(find ./src -type f \( -name "module.ts" -o -name "module.tsx" \))"
+          echo "modulets=${MODULETS}" >> $GITHUB_OUTPUT
+
+      - name: Compatibility check
+        uses: grafana/plugin-actions/is-compatible@main
+        with:
+          module: ${{ steps.find-module-ts.outputs.modulets }}
+          comment-pr: 'no'
+          fail-if-incompatible: 'yes'

.github/workflows/release.yml

@@ -0,0 +1,29 @@
+# This GitHub Action automates the process of building Grafana plugins.
+# (For more information, see https://github.com/grafana/plugin-actions/blob/main/build-plugin/README.md)
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*' # Run workflow on version tags, e.g. v1.0.0.
+
+permissions: read-all
+
+jobs:
+  release:
+    permissions:
+      contents: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - uses: grafana/plugin-actions/build-plugin@main # zizmor: ignore[unpinned-uses] provided by grafana
+        # Uncomment to enable plugin signing
+        # (For more info on how to generate the access policy token see https://grafana.com/developers/plugin-tools/publish-a-plugin/sign-a-plugin#generate-an-access-policy-token)
+        #with:
+        # Make sure to save the token in your repository secrets
+        #policy_token: $
+        # Usage of GRAFANA_API_KEY is deprecated, prefer `policy_token` option above
+        #grafana_token: $

.gitignore

@@ -0,0 +1,46 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+node_modules/
+
+# yarn
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+dist/
+artifacts/
+work/
+ci/
+
+# e2e test directories
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/
+/playwright/.auth/
+
+# Editor
+.idea
+
+.eslintcache

.nvmrc

@@ -0,0 +1 @@
+22

.prettierrc.js

@@ -0,0 +1,4 @@
+module.exports = {
+  // Prettier configuration provided by Grafana scaffolding
+  ...require('./.config/.prettierrc.js'),
+};

20260721/12/grafana-enterprise-10.4.19/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=10.4.19
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

20260721/12/grafana-enterprise-11.2.10/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=11.2.10
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

20260721/12/grafana-enterprise-11.6.16/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=11.6.16
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

20260721/12/grafana-enterprise-12.3.8/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=12.3.8
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

20260721/12/grafana-enterprise-13.1.0/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=13.1.0
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

20260721/12/grafana-enterprise-nightly/summary.txt

@@ -1,5 +0,0 @@
-GRAFANA_IMAGE=grafana-enterprise
-GRAFANA_VERSION=nightly
-OUTPUT=failure
-PLUGIN_NAME=
-UPLOAD_REPORT_ENABLED=false

CHANGELOG.md

@@ -0,0 +1,5 @@
+# Changelog
+
+## 1.0.0 (Unreleased)
+
+Initial release.

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
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+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
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+pattern of such abuse occurs in the area of products for individuals to
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+stand ready to extend this provision to those domains in future versions
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+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+avoid the special danger that patents applied to a free program could
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+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
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+parties to make or receive copies.  Mere interaction with a user through
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+  The "source code" for a work means the preferred form of the work
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+convey, without conditions so long as your license otherwise remains
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+similar laws prohibiting or restricting circumvention of such
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+circumvention of technological measures to the extent such circumvention
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+
+  You may convey verbatim copies of the Program's source code as you
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+
+  If, pursuant to or in connection with a single transaction or
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+
+  A patent license is "discriminatory" if it does not include within
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+conditioned on the non-exercise of one or more of the rights that are
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
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+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
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+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -0,0 +1,11 @@
+# Grafana Battery Visualisation
+
+I hate writing documentation, and since I will have ADHD brain, I will forget how to do this.
+
+```
+npm install
+npm run build
+cp -r dist /var/lib/grafana/plugins/andydixon-battery-panel
+```
+
+in `/etc/grafana/grsfana.ini` add `andydixon-battery-panel` to `allow_loading_unsigned_plugins`

docker-compose.yaml

@@ -0,0 +1,5 @@
+services:
+  grafana:
+    extends:
+      file: .config/docker-compose-base.yaml
+      service: grafana

eslint.config.mjs

@@ -0,0 +1,39 @@
+import { defineConfig } from 'eslint/config';
+import baseConfig from './.config/eslint.config.mjs';
+
+export default defineConfig([
+  {
+    ignores: [
+      '**/logs',
+      '**/*.log',
+      '**/npm-debug.log*',
+      '**/yarn-debug.log*',
+      '**/yarn-error.log*',
+      '**/.pnpm-debug.log*',
+      '**/node_modules/',
+      '.yarn/cache',
+      '.yarn/unplugged',
+      '.yarn/build-state.yml',
+      '.yarn/install-state.gz',
+      '**/.pnp.*',
+      '**/pids',
+      '**/*.pid',
+      '**/*.seed',
+      '**/*.pid.lock',
+      '**/lib-cov',
+      '**/coverage',
+      '**/dist/',
+      '**/artifacts/',
+      '**/work/',
+      '**/ci/',
+      'test-results/',
+      'playwright-report/',
+      'blob-report/',
+      'playwright/.cache/',
+      'playwright/.auth/',
+      '**/.idea',
+      '**/.eslintcache',
+    ],
+  },
+  ...baseConfig,
+]);

jest-setup.js

@@ -0,0 +1,2 @@
+// Jest setup provided by Grafana scaffolding
+import './.config/jest-setup';

jest.config.js

@@ -0,0 +1,8 @@
+// force timezone to UTC to allow tests to work regardless of local timezone
+// generally used by snapshots, but can affect specific tests
+process.env.TZ = 'UTC';
+
+module.exports = {
+  // Jest configuration provided by Grafana scaffolding
+  ...require('./.config/jest.config'),
+};

package.json

@@ -0,0 +1,78 @@
+{
+  "name": "charge-viz-battery-panel",
+  "version": "1.0.0",
+  "scripts": {
+    "build": "webpack -c ./.config/webpack/webpack.config.ts --env production",
+    "dev": "webpack -w -c ./.config/webpack/webpack.config.ts --env development",
+    "test": "jest --watch --onlyChanged",
+    "test:ci": "jest --passWithNoTests --maxWorkers 4",
+    "typecheck": "tsc --noEmit",
+    "lint": "eslint --cache .",
+    "lint:fix": "npm run lint -- --fix && prettier --write --list-different .",
+    "e2e": "playwright test",
+    "server": "docker compose up --build",
+    "sign": "npx --yes @grafana/sign-plugin@latest"
+  },
+  "author": "Andy dixon",
+  "license": "Apache-2.0",
+  "devDependencies": {
+    "@grafana/eslint-config": "^8.2.0",
+    "@grafana/plugin-e2e": "^2.2.0",
+    "@grafana/tsconfig": "^2.0.0",
+    "@playwright/test": "^1.52.0",
+    "@stylistic/eslint-plugin-ts": "^2.9.0",
+    "@swc/core": "^1.3.90",
+    "@swc/helpers": "^0.5.0",
+    "@swc/jest": "^0.2.26",
+    "@testing-library/jest-dom": "6.1.4",
+    "@testing-library/react": "14.0.0",
+    "@types/jest": "^29.5.0",
+    "@types/node": "^20.8.7",
+    "@types/testing-library__jest-dom": "5.14.8",
+    "@typescript-eslint/eslint-plugin": "^8.3.0",
+    "@typescript-eslint/parser": "^8.3.0",
+    "copy-webpack-plugin": "^11.0.0",
+    "css-loader": "^6.7.3",
+    "eslint": "^9.0.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-jsdoc": "^51.2.3",
+    "eslint-plugin-react": "^7.37.5",
+    "eslint-plugin-react-hooks": "^5.2.0",
+    "eslint-webpack-plugin": "^5.0.0",
+    "fork-ts-checker-webpack-plugin": "^8.0.0",
+    "glob": "^10.2.7",
+    "identity-obj-proxy": "3.0.0",
+    "imports-loader": "^5.0.0",
+    "jest": "^29.5.0",
+    "jest-environment-jsdom": "^29.5.0",
+    "prettier": "^2.8.7",
+    "replace-in-file-webpack-plugin": "^1.0.6",
+    "sass": "1.63.2",
+    "sass-loader": "13.3.1",
+    "semver": "^7.6.3",
+    "style-loader": "3.3.3",
+    "swc-loader": "^0.2.3",
+    "terser-webpack-plugin": "^5.3.10",
+    "ts-node": "^10.9.2",
+    "typescript": "5.5.4",
+    "webpack": "^5.94.0",
+    "webpack-cli": "^5.1.4",
+    "webpack-livereload-plugin": "^3.0.2",
+    "webpack-subresource-integrity": "^5.1.0",
+    "webpack-virtual-modules": "^0.6.2"
+  },
+  "engines": {
+    "node": ">=22"
+  },
+  "dependencies": {
+    "@emotion/css": "11.10.6",
+    "@grafana/data": "^12.2.0",
+    "@grafana/i18n": "^12.2.0",
+    "@grafana/runtime": "^12.2.0",
+    "@grafana/ui": "^12.2.0",
+    "@grafana/schema": "^12.2.0",
+    "react": "18.2.0",
+    "react-dom": "18.2.0"
+  },
+  "packageManager": "npm@10.8.2"
+}

playwright.config.ts

@@ -0,0 +1,53 @@
+import type { PluginOptions } from '@grafana/plugin-e2e';
+import { defineConfig, devices } from '@playwright/test';
+import { dirname } from 'node:path';
+
+const pluginE2eAuth = `${dirname(require.resolve('@grafana/plugin-e2e'))}/auth`;
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config();
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+export default defineConfig<PluginOptions>({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    baseURL: process.env.GRAFANA_URL || 'http://localhost:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    // 1. Login to Grafana and store the cookie on disk for use in other tests.
+    {
+      name: 'auth',
+      testDir: pluginE2eAuth,
+      testMatch: [/.*\.js/],
+    },
+    // 2. Run tests in Google Chrome. Every test will start authenticated as admin user.
+    {
+      name: 'chromium',
+      use: {
+        ...devices['Desktop Chrome'],
+        storageState: 'playwright/.auth/admin.json',
+      },
+      dependencies: ['auth'],
+    },
+  ],
+});

provisioning/README.md

@@ -0,0 +1 @@
+For more information see [Provision dashboards and data sources](https://grafana.com/tutorials/provision-dashboards-and-data-sources/)

provisioning/dashboards/dashboard.json

@@ -0,0 +1,104 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": {
+          "type": "grafana",
+          "uid": "-- Grafana --"
+        },
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "fiscalYearStartMonth": 0,
+  "graphTooltip": 0,
+  "id": 1,
+  "links": [],
+  "liveNow": false,
+  "panels": [
+    {
+      "datasource": {
+        "type": "grafana-testdata-datasource",
+        "uid": "trlxrdZVk"
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 0,
+        "y": 0
+      },
+      "id": 1,
+      "options": {
+        "seriesCountSize": "sm",
+        "showSeriesCount": false,
+        "text": "Default value of text input option"
+      },
+      "targets": [
+        {
+          "datasource": {
+            "type": "grafana-testdata-datasource",
+            "uid": "db84e60d-b92a-4089-82cb-34842fb1754b"
+          },
+          "refId": "A",
+          "scenarioId": "raw_frame",
+          "rawFrameContent": "[\n  {\n    \"columns\": [\n      {\n        \"text\": \"Time\",\n        \"type\": \"time\"\n      },\n      {\n        \"text\": \"Label\",\n        \"type\": \"string\"\n      },\n      {\n        \"text\": \"Value\",\n        \"type\": \"number\"\n      }\n    ],\n    \"rows\": [\n      [1609459200000, \"A\", 10],\n      [1609462800000, \"B\", 20],\n      [1609466400000, \"C\", 15],\n      [1609470000000, \"D\", 25],\n      [1609473600000, \"E\", 30]\n    ]\n  },\n{\n    \"columns\": [\n      {\n        \"text\": \"Time\",\n        \"type\": \"time\"\n      },\n      {\n        \"text\": \"Label\",\n        \"type\": \"string\"\n      },\n      {\n        \"text\": \"Value\",\n        \"type\": \"number\"\n      }\n    ],\n    \"rows\": [\n      [1609459200000, \"A\", 40],\n      [1609462800000, \"B\", 50],\n      [1609466400000, \"C\", 45],\n      [1609470000000, \"D\", 55],\n      [1609473600000, \"E\", 60]\n    ]\n  }\n]"
+        }
+      ],
+      "title": "Sample Panel Title",
+      "type": "andydixon-chargevizbattery-panel"
+    },
+    {
+      "datasource": {
+        "type": "grafana-testdata-datasource",
+        "uid": "trlxrdZVk"
+      },
+      "gridPos": {
+        "h": 8,
+        "w": 12,
+        "x": 12,
+        "y": 0
+      },
+      "id": 2,
+      "options": {
+        "seriesCountSize": "sm",
+        "showSeriesCount": false,
+        "text": "Default value of text input option"
+      },
+      "targets": [
+        {
+          "alias": "",
+          "datasource": {
+            "type": "grafana-testdata-datasource",
+            "uid": "db84e60d-b92a-4089-82cb-34842fb1754b"
+          },
+          "refId": "A",
+          "scenarioId": "no_data_points"
+        }
+      ],
+      "title": "Sample Panel Title",
+      "type": "andydixon-chargevizbattery-panel"
+    }
+  ],
+  "refresh": "",
+  "schemaVersion": 39,
+  "tags": [],
+  "templating": {
+    "list": []
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {},
+  "timezone": "",
+  "title": "Provisioned ChargeViz Battery Panel dashboard",
+  "uid": "a538aeff-5a8a-42a5-901c-938d896fdd6f",
+  "version": 1,
+  "weekStart": ""
+}

provisioning/dashboards/default.yaml

@@ -0,0 +1,7 @@
+apiVersion: 1
+
+providers:
+  - name: 'ChargeViz Battery Panel'
+    type: file
+    options:
+      path: /etc/grafana/provisioning/dashboards

provisioning/datasources/datasources.yml

@@ -0,0 +1,7 @@
+apiVersion: 1
+
+datasources:
+  - name: TestData DB
+    type: testdata
+    uid: trlxrdZVk
+    isDefault: true

src/README.md

@@ -0,0 +1,50 @@
+<!-- This README file is going to be the one displayed on the Grafana.com website for your plugin. Uncomment and replace the content here before publishing.
+
+Remove any remaining comments before publishing as these may be displayed on Grafana.com -->
+
+# ChargeViz Battery Panel
+
+<!-- To help maximize the impact of your README and improve usability for users, we propose the following loose structure:
+
+**BEFORE YOU BEGIN**
+- Ensure all links are absolute URLs so that they will work when the README is displayed within Grafana and Grafana.com
+- Be inspired ✨
+  - [grafana-polystat-panel](https://github.com/grafana/grafana-polystat-panel)
+  - [volkovlabs-variable-panel](https://github.com/volkovlabs/volkovlabs-variable-panel)
+
+**ADD SOME BADGES**
+
+Badges convey useful information at a glance for users whether in the Catalog or viewing the source code. You can use the generator on [Shields.io](https://shields.io/badges/dynamic-json-badge) together with the Grafana.com API
+to create dynamic badges that update automatically when you publish a new version to the marketplace.
+
+- For the URL parameter use `https://grafana.com/api/plugins/your-plugin-id`.
+- Example queries:
+  - Downloads: `$.downloads`
+  - Catalog Version: `$.version`
+  - Grafana Dependency: `$.grafanaDependency`
+  - Signature Type: `$.versionSignatureType`
+- Optionally, for the logo parameter use `grafana`.
+
+Full example: ![Dynamic JSON Badge](https://img.shields.io/badge/dynamic/json?logo=grafana&query=$.version&url=https://grafana.com/api/plugins/grafana-polystat-panel&label=Marketplace&prefix=v&color=F47A20)
+
+Consider other [badges](https://shields.io/badges) as you feel appropriate for your project.
+
+## Overview / Introduction
+Provide one or more paragraphs as an introduction to your plugin to help users understand why they should use it.
+
+Consider including screenshots:
+- in [plugin.json](https://grafana.com/developers/plugin-tools/reference/plugin-json#info) include them as relative links.
+- in the README ensure they are absolute URLs.
+
+## Requirements
+List any requirements or dependencies they may need to run the plugin.
+
+## Getting Started
+Provide a quick start on how to configure and use the plugin.
+
+## Documentation
+If your project has dedicated documentation available for users, provide links here. For help in following Grafana's style recommendations for technical documentation, refer to our [Writer's Toolkit](https://grafana.com/docs/writers-toolkit/).
+
+## Contributing
+Do you want folks to contribute to the plugin or provide feedback through specific means? If so, tell them how!
+-->

src/components/ChargeVizPanel.tsx

@@ -0,0 +1,823 @@
+import React, { useId, useMemo } from 'react';
+import { PanelProps, Field, DataFrame } from '@grafana/data';
+import { useTheme2 } from '@grafana/ui';
+import { css, keyframes } from '@emotion/css';
+import { ChargeVizOptions } from '../types';
+
+interface Props extends PanelProps<ChargeVizOptions> {}
+
+// ---------------------------------------------------------------------------
+// Helpers
+// ---------------------------------------------------------------------------
+
+const toFinite = (v: unknown): number | undefined => {
+  const n = Number(v);
+  return Number.isFinite(n) ? n : undefined;
+};
+
+function slopePercentPerMinute(times: number[], values: number[]): number {
+  const pts: Array<[number, number]> = [];
+  for (let i = 0; i < times.length; i++) {
+    const t = toFinite(times[i]);
+    const v = toFinite(values[i]);
+    if (t !== undefined && v !== undefined) {
+      pts.push([t, v]);
+    }
+  }
+  if (pts.length < 2) {
+    return 0;
+  }
+
+  const xs = pts.map((p) => (p[0] - pts[0][0]) / 60000);
+  const ys = pts.map((p) => p[1]);
+  const xMean = xs.reduce((a, b) => a + b, 0) / xs.length;
+  const yMean = ys.reduce((a, b) => a + b, 0) / ys.length;
+
+  let num = 0;
+  let den = 0;
+  for (let i = 0; i < xs.length; i++) {
+    num += (xs[i] - xMean) * (ys[i] - yMean);
+    den += (xs[i] - xMean) ** 2;
+  }
+  return den === 0 ? 0 : num / den;
+}
+
+/** Infer battery state from the trend of the last ≤ maxPoints values. */
+function inferStateFromTrend(
+  values: number[],
+  maxPoints = 50,
+  threshold = 0.01,
+): 'charging' | 'discharging' | 'stable' {
+  const tail = values.length > maxPoints ? values.slice(-maxPoints) : values;
+  if (tail.length < 2) {
+    return 'stable';
+  }
+
+  // Simple least-squares slope over the tail window
+  const n = tail.length;
+  let sumX = 0;
+  let sumY = 0;
+  let sumXY = 0;
+  let sumXX = 0;
+  for (let i = 0; i < n; i++) {
+    sumX += i;
+    sumY += tail[i];
+    sumXY += i * tail[i];
+    sumXX += i * i;
+  }
+  const slope = (n * sumXY - sumX * sumY) / (n * sumXX - sumX * sumX);
+
+  if (slope > threshold) {
+    return 'charging';
+  }
+  if (slope < -threshold) {
+    return 'discharging';
+  }
+  return 'stable';
+}
+
+/** Format minutes into a human-readable duration string. */
+function formatMinutes(mins: number): string {
+  if (!Number.isFinite(mins) || mins < 0) {
+    return '—';
+  }
+  if (mins < 1) {
+    return '< 1 min';
+  }
+  const h = Math.floor(mins / 60);
+  const m = Math.round(mins % 60);
+  if (h === 0) {
+    return `${m} min`;
+  }
+  return m > 0 ? `${h}h ${m}m` : `${h}h`;
+}
+
+/**
+ * Resolve a field across all data frames using the "refId:fieldName" key
+ * format produced by the dropdown, or a plain field name for manual entry.
+ * Returns the matching field and its companion time field, or undefined.
+ */
+function resolveFieldByKey(
+  series: DataFrame[],
+  key: string | undefined,
+): { field: Field; timeField: Field } | undefined {
+  if (!key) {
+    return undefined;
+  }
+
+  // Try "refId:fieldName" format first
+  const colonIdx = key.indexOf(':');
+  if (colonIdx > 0) {
+    const refId = key.substring(0, colonIdx);
+    const fieldName = key.substring(colonIdx + 1);
+
+    for (const frame of series) {
+      if (frame.refId !== refId && frame.name !== refId) {
+        continue;
+      }
+      const timeField = frame.fields.find((f) => f.type === 'time');
+      const match = frame.fields.find((f) => f.name === fieldName && f.type !== 'time');
+      if (match && timeField) {
+        return { field: match, timeField };
+      }
+    }
+  }
+
+  // Fallback: search all frames by field name, display name, frame name, or refId
+  const needle = key.toLowerCase().trim();
+  for (const frame of series) {
+    const timeField = frame.fields.find((f) => f.type === 'time');
+    if (!timeField) {
+      continue;
+    }
+
+    for (const field of frame.fields) {
+      if (field.type === 'time') {
+        continue;
+      }
+
+      const candidates = [
+        field.name,
+        field.config?.displayName,
+        field.config?.displayNameFromDS,
+        frame.name,
+        frame.refId,
+      ];
+
+      for (const c of candidates) {
+        if (c && c.toLowerCase().trim() === needle) {
+          return { field, timeField };
+        }
+      }
+    }
+  }
+
+  return undefined;
+}
+
+/**
+ * Get the first numeric field from the first series (default fallback).
+ */
+function getFirstNumericField(
+  series: DataFrame[],
+): { field: Field; timeField: Field } | undefined {
+  for (const frame of series) {
+    const timeField = frame.fields.find((f) => f.type === 'time');
+    const numField = frame.fields.find((f) => f.type === 'number');
+    if (numField && timeField) {
+      return { field: numField, timeField };
+    }
+  }
+  return undefined;
+}
+
+// ---------------------------------------------------------------------------
+// SVG sub-components
+// ---------------------------------------------------------------------------
+
+interface BatteryGfxProps {
+  fillLevel: number;
+  fillColour: string;
+  gradientFill: boolean;
+  gradientId: string;
+  clipId: string;
+  startColour: string;
+  endColour: string;
+  strokeColour: string;
+  borderWidth: number;
+  showPercentage: boolean;
+  animating: boolean;
+  textColour: string;
+}
+
+const pulseKf = keyframes`
+  0%, 100% { opacity: 1; }
+  50% { opacity: 0.6; }
+`;
+
+function VerticalBattery(props: BatteryGfxProps) {
+  const {
+    fillLevel, fillColour, gradientFill, gradientId, clipId,
+    startColour, endColour, strokeColour, borderWidth, showPercentage,
+    animating, textColour,
+  } = props;
+
+  const bodyX = 5;
+  const bodyY = 14;
+  const bodyW = 100;
+  const bodyH = 220;
+  const r = 8;
+  const fillH = (fillLevel / 100) * bodyH;
+
+  return (
+    <svg viewBox="0 0 110 244" preserveAspectRatio="xMidYMid meet" width="100%" height="100%">
+      <defs>
+        {gradientFill && (
+          <linearGradient id={gradientId} x1="0" y1="1" x2="0" y2="0">
+            <stop offset="0%" stopColor={startColour} />
+            <stop offset="100%" stopColor={endColour} />
+          </linearGradient>
+        )}
+        <clipPath id={clipId}>
+          <rect x={bodyX} y={bodyY} width={bodyW} height={bodyH} rx={r} ry={r} />
+        </clipPath>
+      </defs>
+
+      <rect x="38" y="2" width="34" height="12" rx="4" ry="4" fill={strokeColour} />
+
+      <rect
+        x={bodyX} y={bodyY} width={bodyW} height={bodyH}
+        rx={r} ry={r}
+        stroke={strokeColour} strokeWidth={borderWidth} fill="none"
+      />
+
+      <rect
+        x={bodyX}
+        y={bodyY + bodyH - fillH}
+        width={bodyW}
+        height={fillH}
+        fill={gradientFill ? `url(#${gradientId})` : fillColour}
+        clipPath={`url(#${clipId})`}
+        className={animating ? css`animation: ${pulseKf} 2s ease-in-out infinite;` : undefined}
+      />
+
+      {showPercentage && (
+        <text
+          x={bodyX + bodyW / 2}
+          y={bodyY + bodyH / 2}
+          textAnchor="middle"
+          dominantBaseline="central"
+          fill={textColour}
+          fontSize="28"
+          fontWeight="bold"
+          style={{ pointerEvents: 'none' }}
+        >
+          {fillLevel.toFixed(0)}%
+        </text>
+      )}
+    </svg>
+  );
+}
+
+function HorizontalBattery(props: BatteryGfxProps) {
+  const {
+    fillLevel, fillColour, gradientFill, gradientId, clipId,
+    startColour, endColour, strokeColour, borderWidth, showPercentage,
+    animating, textColour,
+  } = props;
+
+  const bodyX = 5;
+  const bodyY = 5;
+  const bodyW = 220;
+  const bodyH = 100;
+  const r = 8;
+  const fillW = (fillLevel / 100) * bodyW;
+
+  return (
+    <svg viewBox="0 0 248 110" preserveAspectRatio="xMidYMid meet" width="100%" height="100%">
+      <defs>
+        {gradientFill && (
+          <linearGradient id={gradientId} x1="0" y1="0" x2="1" y2="0">
+            <stop offset="0%" stopColor={startColour} />
+            <stop offset="100%" stopColor={endColour} />
+          </linearGradient>
+        )}
+        <clipPath id={clipId}>
+          <rect x={bodyX} y={bodyY} width={bodyW} height={bodyH} rx={r} ry={r} />
+        </clipPath>
+      </defs>
+
+      <rect x={bodyX + bodyW + 2} y="33" width="12" height="34" rx="4" ry="4" fill={strokeColour} />
+
+      <rect
+        x={bodyX} y={bodyY} width={bodyW} height={bodyH}
+        rx={r} ry={r}
+        stroke={strokeColour} strokeWidth={borderWidth} fill="none"
+      />
+
+      <rect
+        x={bodyX}
+        y={bodyY}
+        width={fillW}
+        height={bodyH}
+        fill={gradientFill ? `url(#${gradientId})` : fillColour}
+        clipPath={`url(#${clipId})`}
+        className={animating ? css`animation: ${pulseKf} 2s ease-in-out infinite;` : undefined}
+      />
+
+      {showPercentage && (
+        <text
+          x={bodyX + bodyW / 2}
+          y={bodyY + bodyH / 2}
+          textAnchor="middle"
+          dominantBaseline="central"
+          fill={textColour}
+          fontSize="28"
+          fontWeight="bold"
+          style={{ pointerEvents: 'none' }}
+        >
+          {fillLevel.toFixed(0)}%
+        </text>
+      )}
+    </svg>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Load gauge – a semi-circular arc rendered as SVG
+// ---------------------------------------------------------------------------
+
+interface LoadGaugeProps {
+  value: number;        // 0–100
+  size: number;         // px diameter
+  colour: string;
+  trackColour: string;
+  textColour: string;
+}
+
+function LoadGauge({ value, size, colour, trackColour, textColour }: LoadGaugeProps) {
+  const clamped = Math.max(0, Math.min(100, value));
+  const r = 40;
+  const cx = 50;
+  const cy = 50;
+  const startAngle = 135;
+  const totalSweep = 270;
+  const endAngle = startAngle + (clamped / 100) * totalSweep;
+
+  const toRad = (deg: number) => (deg * Math.PI) / 180;
+  const arcPoint = (angle: number) => ({
+    x: cx + r * Math.cos(toRad(angle)),
+    y: cy + r * Math.sin(toRad(angle)),
+  });
+
+  // Track (background arc)
+  const trackEnd = startAngle + totalSweep;
+  const tStart = arcPoint(startAngle);
+  const tEnd = arcPoint(trackEnd);
+  const trackLargeArc = totalSweep > 180 ? 1 : 0;
+  const trackPath = `M ${tStart.x} ${tStart.y} A ${r} ${r} 0 ${trackLargeArc} 1 ${tEnd.x} ${tEnd.y}`;
+
+  // Value arc
+  const vStart = arcPoint(startAngle);
+  const vEnd = arcPoint(endAngle);
+  const sweep = (clamped / 100) * totalSweep;
+  const largeArc = sweep > 180 ? 1 : 0;
+  const valuePath = clamped > 0
+    ? `M ${vStart.x} ${vStart.y} A ${r} ${r} 0 ${largeArc} 1 ${vEnd.x} ${vEnd.y}`
+    : '';
+
+  return (
+    <svg viewBox="0 0 100 100" width={size} height={size}>
+      <path d={trackPath} fill="none" stroke={trackColour} strokeWidth="8" strokeLinecap="round" />
+      {valuePath && (
+        <path d={valuePath} fill="none" stroke={colour} strokeWidth="8" strokeLinecap="round" />
+      )}
+      <text
+        x={cx}
+        y={cy - 2}
+        textAnchor="middle"
+        dominantBaseline="central"
+        fill={textColour}
+        fontSize="18"
+        fontWeight="bold"
+      >
+        {clamped.toFixed(0)}%
+      </text>
+      <text
+        x={cx}
+        y={cy + 14}
+        textAnchor="middle"
+        dominantBaseline="central"
+        fill={textColour}
+        fontSize="9"
+        opacity="0.7"
+      >
+        LOAD
+      </text>
+    </svg>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Main panel
+// ---------------------------------------------------------------------------
+
+export const ChargeVizPanel: React.FC<Props> = ({ data, width, height, options, id }) => {
+  const theme = useTheme2();
+  const reactId = useId();
+  const gradientId = `battGrad-${id}-${reactId}`;
+  const clipId = `battClip-${id}-${reactId}`;
+
+  // Options with defaults
+  const lowColour = options.lowColour || '#F44336';
+  const midColour = options.midColour || '#FF9800';
+  const highColour = options.highColour || '#4CAF50';
+  const lowThreshold = options.lowThreshold ?? 30;
+  const highThreshold = options.highThreshold ?? 70;
+  const gradientFill = options.gradientFill ?? true;
+  const chargingAnimation = options.chargingAnimation ?? true;
+  const borderWidth = options.borderWidth ?? 3;
+  const dp = Number.isFinite(options.decimalPlaces) ? options.decimalPlaces : 2;
+  const useRegression = options.useRegressionForRate ?? false;
+  const showPercentage = options.showPercentage ?? true;
+  const showRate = options.showRate ?? true;
+  const showLowHigh = options.showLowHigh ?? true;
+  const showStatus = options.showStatus ?? true;
+  const enableLoad = options.enableLoad ?? false;
+  const enableTimeLeft = options.enableTimeLeft ?? false;
+  const enableStateField = options.enableStateField ?? false;
+  const stateChargingValue = (options.stateChargingValue ?? 'charging').toLowerCase();
+  const stateDischargingValue = (options.stateDischargingValue ?? 'discharging').toLowerCase();
+
+  // -----------------------------------------------------------------------
+  // Data extraction
+  // -----------------------------------------------------------------------
+  const extracted = useMemo(() => {
+    let cur = 0;
+    let r = 0;
+    let lo = 0;
+    let hi = 0;
+    let loadValue: number | undefined;
+    let timeLeftValue: number | undefined;
+    let stateFromField: 'charging' | 'discharging' | 'stable' | undefined;
+    let inferredState: 'charging' | 'discharging' | 'stable' = 'stable';
+
+    const allSeries = data.series;
+
+    if (allSeries.length > 0) {
+      // Resolve the charge field: user selection → first numeric field
+      const chargeResolved = resolveFieldByKey(allSeries, options.chargeField)
+        ?? getFirstNumericField(allSeries);
+
+      if (chargeResolved) {
+        const rawValues = Array.from(chargeResolved.field.values);
+        const rawTimes = Array.from(chargeResolved.timeField.values);
+        const values: number[] = [];
+        const times: number[] = [];
+
+        for (let i = 0; i < rawValues.length; i++) {
+          const v = toFinite(rawValues[i]);
+          const t = toFinite(rawTimes[i]);
+          if (v !== undefined && t !== undefined) {
+            values.push(v);
+            times.push(t);
+          }
+        }
+
+        if (values.length > 0) {
+          cur = values[values.length - 1];
+          lo = Math.min(...values);
+          hi = Math.max(...values);
+
+          if (values.length >= 2) {
+            if (useRegression) {
+              r = slopePercentPerMinute(times, values);
+            } else {
+              const deltaPercent = values[values.length - 1] - values[0];
+              const deltaMinutes = (times[times.length - 1] - times[0]) / 60000;
+              r = deltaMinutes !== 0 ? deltaPercent / deltaMinutes : 0;
+            }
+          }
+
+          inferredState = inferStateFromTrend(values);
+        }
+      }
+
+      // Load field — search across all series
+      if (enableLoad && options.loadField) {
+        const loadResolved = resolveFieldByKey(allSeries, options.loadField);
+        if (loadResolved) {
+          const arr = Array.from(loadResolved.field.values);
+          const last = toFinite(arr[arr.length - 1]);
+          if (last !== undefined) {
+            loadValue = last;
+          }
+        }
+      }
+
+      // Time remaining field — search across all series
+      if (enableTimeLeft && options.timeLeftField) {
+        const tlResolved = resolveFieldByKey(allSeries, options.timeLeftField);
+        if (tlResolved) {
+          const arr = Array.from(tlResolved.field.values);
+          const last = toFinite(arr[arr.length - 1]);
+          if (last !== undefined) {
+            timeLeftValue = last;
+          }
+        }
+      }
+
+      // State field — search across all series
+      if (enableStateField && options.stateField) {
+        const stateResolved = resolveFieldByKey(allSeries, options.stateField);
+        if (stateResolved) {
+          const arr = Array.from(stateResolved.field.values);
+          const lastRaw = arr[arr.length - 1];
+          if (lastRaw !== undefined && lastRaw !== null) {
+            const v = String(lastRaw).toLowerCase().trim();
+            if (v === stateChargingValue) {
+              stateFromField = 'charging';
+            } else if (v === stateDischargingValue) {
+              stateFromField = 'discharging';
+            } else {
+              stateFromField = 'stable';
+            }
+          }
+        }
+      }
+    }
+
+    return { currentValue: cur, rate: r, low: lo, high: hi, loadValue, timeLeftValue, stateFromField, inferredState };
+  }, [
+    data.series, useRegression, enableLoad, enableTimeLeft, enableStateField,
+    options.chargeField, options.loadField, options.timeLeftField, options.stateField,
+    stateChargingValue, stateDischargingValue,
+  ]);
+
+  const { currentValue, rate, low, high, loadValue, timeLeftValue, stateFromField, inferredState } = extracted;
+
+  // -----------------------------------------------------------------------
+  // Derived visual values
+  // -----------------------------------------------------------------------
+  const fillLevel = Math.max(0, Math.min(100, currentValue));
+
+  let fillColour = midColour;
+  if (fillLevel < lowThreshold) {
+    fillColour = lowColour;
+  } else if (fillLevel >= highThreshold) {
+    fillColour = highColour;
+  }
+
+  let startColour = fillColour;
+  let endColour = fillColour;
+
+  // Determine charging state: state field → inferred trend from last ≤50 points → stable
+  const resolvedState = stateFromField ?? inferredState;
+  const isCharging = resolvedState === 'charging';
+  const isDischarging = resolvedState === 'discharging';
+
+  if (gradientFill) {
+    if (isCharging) {
+      endColour = theme.colors.success.text;
+    } else if (isDischarging) {
+      startColour = theme.colors.error.text;
+    }
+  }
+
+  const animating = chargingAnimation && isCharging;
+
+  const showAnyStats = showRate || showLowHigh || showStatus;
+  const hasLoadExtra = enableLoad && loadValue !== undefined;
+  const hasTimeLeftExtra = enableTimeLeft && timeLeftValue !== undefined;
+  const hasExtras = hasLoadExtra || hasTimeLeftExtra;
+
+  // -----------------------------------------------------------------------
+  // Responsive layout
+  // -----------------------------------------------------------------------
+
+  // Auto-revert horizontal to vertical when the panel is too narrow
+  // for horizontal battery + side content to fit comfortably.
+  const preferredOrientation = options.orientation ?? 'vertical';
+  const effectiveOrientation = preferredOrientation === 'horizontal' && width < 300
+    ? 'vertical'
+    : preferredOrientation;
+
+  const isCompact = effectiveOrientation === 'vertical' ? width < 140 : height < 100;
+  const isTiny = width < 80 || height < 80;
+
+  const useColumnLayout = effectiveOrientation === 'vertical'
+    ? width < 240
+    : height < 200;
+
+  const statAreaSize = useColumnLayout
+    ? (effectiveOrientation === 'vertical' ? height * 0.3 : width * 0.3)
+    : (effectiveOrientation === 'vertical' ? width * 0.5 : height * 0.5);
+  const baseFontSize = Math.max(10, Math.min(16, statAreaSize / 8));
+
+  // Gauge size scales with available panel space
+  const gaugeSize = Math.max(48, Math.min(120, Math.min(width, height) * 0.35));
+
+  // No-data state
+  if (data.series.length === 0) {
+    return (
+      <div
+        className={css`
+          display: flex;
+          align-items: center;
+          justify-content: center;
+          height: 100%;
+          width: 100%;
+          color: ${theme.colors.text.secondary};
+          font-size: 14px;
+        `}
+        data-testid="charge-viz-panel"
+      >
+        No data
+      </div>
+    );
+  }
+
+  // -----------------------------------------------------------------------
+  // Styles
+  // -----------------------------------------------------------------------
+  const containerStyle = css`
+    display: flex;
+    flex-direction: ${useColumnLayout ? 'column' : 'row'};
+    align-items: center;
+    justify-content: center;
+    height: 100%;
+    width: 100%;
+    padding: 4px;
+    box-sizing: border-box;
+    gap: ${useColumnLayout ? '2px' : '8px'};
+    overflow: hidden;
+    font-family: Inter, Helvetica, Arial, sans-serif;
+    color: ${theme.colors.text.primary};
+  `;
+
+  const batteryWrapStyle = css`
+    flex: 1 1 auto;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    min-width: 0;
+    min-height: 0;
+    ${useColumnLayout ? 'width: 100%;' : 'height: 100%;'}
+    overflow: hidden;
+  `;
+
+  const sidePanelStyle = css`
+    flex: 0 0 auto;
+    display: flex;
+    flex-direction: column;
+    align-items: ${useColumnLayout ? 'center' : 'flex-start'};
+    justify-content: center;
+    gap: 6px;
+    overflow: hidden;
+    max-width: 100%;
+  `;
+
+  const statsStyle = css`
+    display: flex;
+    flex-direction: column;
+    align-items: inherit;
+    gap: 2px;
+    font-size: ${baseFontSize}px;
+    line-height: 1.4;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+  `;
+
+  const statusBadgeStyle = css`
+    display: inline-flex;
+    align-items: center;
+    gap: 4px;
+    padding: 2px 10px;
+    border-radius: 12px;
+    font-size: ${baseFontSize * 0.9}px;
+    font-weight: 600;
+    background: ${isCharging
+      ? theme.colors.success.transparent
+      : isDischarging
+        ? theme.colors.error.transparent
+        : theme.colors.secondary.transparent};
+    color: ${isCharging
+      ? theme.colors.success.text
+      : isDischarging
+        ? theme.colors.error.text
+        : theme.colors.text.secondary};
+  `;
+
+  const loadCardStyle = css`
+    display: flex;
+    flex-direction: column;
+    align-items: center;
+    padding: 4px;
+    border-radius: 8px;
+    background: ${theme.colors.background.secondary};
+    border: 1px solid ${theme.colors.border.weak};
+  `;
+
+  const textColour = fillLevel > 45 ? '#ffffff' : theme.colors.text.primary;
+
+  const batteryProps: BatteryGfxProps = {
+    fillLevel,
+    fillColour,
+    gradientFill,
+    gradientId,
+    clipId,
+    startColour,
+    endColour,
+    strokeColour: theme.colors.text.secondary,
+    borderWidth,
+    showPercentage: showPercentage && !isTiny,
+    animating,
+    textColour,
+  };
+
+  // Load gauge colour: green if low load, amber if moderate, red if high
+  const loadClamped = loadValue !== undefined ? Math.max(0, Math.min(100, loadValue)) : 0;
+  const loadColour = loadClamped >= 80
+    ? theme.colors.error.text
+    : loadClamped >= 50
+      ? theme.colors.warning.text
+      : theme.colors.success.text;
+
+  // -----------------------------------------------------------------------
+  // Render
+  // -----------------------------------------------------------------------
+  return (
+    <div className={containerStyle} data-testid="charge-viz-panel">
+      <div className={batteryWrapStyle}>
+        {effectiveOrientation === 'vertical'
+          ? <VerticalBattery {...batteryProps} />
+          : <HorizontalBattery {...batteryProps} />
+        }
+      </div>
+
+      {(showAnyStats || hasExtras) && !isTiny && (
+        <div className={sidePanelStyle}>
+          {/* Load gauge card */}
+          {hasLoadExtra && !isCompact && (
+            <div className={loadCardStyle}>
+              <LoadGauge
+                value={loadClamped}
+                size={gaugeSize}
+                colour={loadColour}
+                trackColour={theme.colors.border.weak}
+                textColour={theme.colors.text.primary}
+              />
+            </div>
+          )}
+
+          {/* Compact load fallback when gauge doesn't fit */}
+          {hasLoadExtra && isCompact && (
+            <div className={css`
+              font-size: ${baseFontSize}px;
+              white-space: nowrap;
+            `}>
+              <span style={{ opacity: 0.7, marginRight: 4 }}>Load</span>
+              <strong style={{ color: loadColour }}>{loadClamped.toFixed(0)}%</strong>
+            </div>
+          )}
+
+          {/* Time remaining */}
+          {hasTimeLeftExtra && (
+            <div className={css`
+              display: flex;
+              align-items: center;
+              gap: 6px;
+              padding: 4px 10px;
+              border-radius: 8px;
+              background: ${theme.colors.background.secondary};
+              border: 1px solid ${theme.colors.border.weak};
+              white-space: nowrap;
+              font-size: ${baseFontSize}px;
+            `}>
+              <span style={{ fontSize: baseFontSize * 1.1, lineHeight: 1 }}>⏱</span>
+              <div>
+                <div style={{ opacity: 0.7, fontSize: baseFontSize * 0.8, lineHeight: 1.2 }}>
+                  Time remaining
+                </div>
+                <strong style={{ fontSize: baseFontSize * 1.15 }}>
+                  {formatMinutes(timeLeftValue!)}
+                </strong>
+              </div>
+            </div>
+          )}
+
+          {/* Status badge */}
+          {showStatus && !isCompact && (
+            <div className={statusBadgeStyle}>
+              {isCharging ? '⚡ Charging' : isDischarging ? '🔋 On Battery' : '— Stable'}
+            </div>
+          )}
+
+          {/* Stats */}
+          {(showRate || showLowHigh) && (
+            <div className={statsStyle}>
+              {showRate && (
+                <div>
+                  <span style={{ opacity: 0.7, marginRight: 4 }}>Rate</span>
+                  <strong>{rate.toFixed(dp)} %/min</strong>
+                </div>
+              )}
+              {showLowHigh && (
+                <>
+                  <div>
+                    <span style={{ opacity: 0.7, marginRight: 4 }}>Low</span>
+                    <strong>{low.toFixed(dp)}%</strong>
+                  </div>
+                  <div>
+                    <span style={{ opacity: 0.7, marginRight: 4 }}>High</span>
+                    <strong>{high.toFixed(dp)}%</strong>
+                  </div>
+                </>
+              )}
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+};

src/img/logo.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="#4CAF50" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="1" y="6" width="18" height="12" rx="2" ry="2"/><line x1="23" y1="10" x2="23" y2="14"/><rect x="3" y="8" width="6" height="8" rx="1" ry="1" fill="#4CAF50" stroke="none"/><rect x="10" y="8" width="6" height="8" rx="1" ry="1" fill="#4CAF50" stroke="none" opacity="0.4"/></svg>

src/module.ts

@@ -0,0 +1,278 @@
+import { PanelPlugin, SelectableValue } from '@grafana/data';
+import { ChargeVizPanel } from './components/ChargeVizPanel';
+import { ChargeVizOptions } from './types';
+
+/**
+ * Build a list of selectable field identifiers from the panel's data frames.
+ * Each option label shows "fieldName (refId)" so users can distinguish
+ * fields from different queries.
+ */
+function buildFieldOptions(data: Array<{ fields: Array<{ name: string; type: string }>; refId?: string; name?: string }>): Array<SelectableValue<string>> {
+  const opts: Array<SelectableValue<string>> = [
+    { label: '— Auto (first number field)', value: '' },
+  ];
+  const seen = new Set<string>();
+
+  for (const frame of data) {
+    const label = frame.refId || frame.name || '';
+    for (const field of frame.fields) {
+      if (field.type === 'time') {
+        continue;
+      }
+      // Use "refId:fieldName" as a unique key to handle multiple series
+      // with identically-named fields.
+      const key = label ? `${label}:${field.name}` : field.name;
+      if (seen.has(key)) {
+        continue;
+      }
+      seen.add(key);
+
+      const display = label ? `${field.name}  (${label})` : field.name;
+      opts.push({ label: display, value: key });
+    }
+  }
+
+  return opts;
+}
+
+export const plugin = new PanelPlugin<ChargeVizOptions>(ChargeVizPanel).setPanelOptions(
+  (builder, context) => {
+    const fieldOptions = buildFieldOptions(context.data ?? []);
+    const fieldOptionsNoAuto = fieldOptions.filter((o) => o.value !== '');
+
+    // -- Field Mapping category (top) --
+    builder.addSelect({
+      path: 'chargeField',
+      name: 'Charge field',
+      defaultValue: '',
+      category: ['Field Mapping'],
+      description: 'Numeric field for battery charge (0–100%).',
+      settings: {
+        allowCustomValue: true,
+        isClearable: true,
+        options: fieldOptions,
+      },
+    });
+
+    builder.addBooleanSwitch({
+      path: 'enableLoad',
+      name: 'Enable load metric',
+      defaultValue: false,
+      category: ['Field Mapping'],
+      description: 'Show a second metric representing current load / power draw.',
+    });
+
+    builder.addSelect({
+      path: 'loadField',
+      name: 'Load field',
+      defaultValue: '',
+      category: ['Field Mapping'],
+      description: 'Numeric field for load percentage (0–100%).',
+      settings: {
+        allowCustomValue: true,
+        isClearable: true,
+        options: fieldOptionsNoAuto,
+      },
+      showIf: (opts) => opts.enableLoad === true,
+    });
+
+    builder.addBooleanSwitch({
+      path: 'enableTimeLeft',
+      name: 'Enable time remaining',
+      defaultValue: false,
+      category: ['Field Mapping'],
+      description: 'Show estimated time remaining from a data field (value in minutes).',
+    });
+
+    builder.addSelect({
+      path: 'timeLeftField',
+      name: 'Time remaining field',
+      defaultValue: '',
+      category: ['Field Mapping'],
+      description: 'Numeric field for estimated time remaining (in minutes).',
+      settings: {
+        allowCustomValue: true,
+        isClearable: true,
+        options: fieldOptionsNoAuto,
+      },
+      showIf: (opts) => opts.enableTimeLeft === true,
+    });
+
+    builder.addBooleanSwitch({
+      path: 'enableStateField',
+      name: 'Enable state field',
+      defaultValue: false,
+      category: ['Field Mapping'],
+      description: 'Use a data field to determine charging / discharging state instead of inferring from the trend.',
+    });
+
+    builder.addSelect({
+      path: 'stateField',
+      name: 'State field',
+      defaultValue: '',
+      category: ['Field Mapping'],
+      description: 'Field whose value indicates battery state.',
+      settings: {
+        allowCustomValue: true,
+        isClearable: true,
+        options: fieldOptionsNoAuto,
+      },
+      showIf: (opts) => opts.enableStateField === true,
+    });
+
+    builder.addTextInput({
+      path: 'stateChargingValue',
+      name: 'Charging value',
+      defaultValue: 'charging',
+      category: ['Field Mapping'],
+      description: 'Value in the state field that means "charging" (case-insensitive).',
+      showIf: (opts) => opts.enableStateField === true,
+    });
+
+    builder.addTextInput({
+      path: 'stateDischargingValue',
+      name: 'Discharging value',
+      defaultValue: 'discharging',
+      category: ['Field Mapping'],
+      description: 'Value in the state field that means "discharging" (case-insensitive).',
+      showIf: (opts) => opts.enableStateField === true,
+    });
+
+    // -- Colours category --
+    builder.addColorPicker({
+      path: 'lowColour',
+      name: 'Low battery colour',
+      defaultValue: '#F44336',
+      category: ['Colours'],
+      description: 'Colour when charge is below the low threshold.',
+    });
+
+    builder.addColorPicker({
+      path: 'midColour',
+      name: 'Medium battery colour',
+      defaultValue: '#FF9800',
+      category: ['Colours'],
+      description: 'Colour when charge is between the low and high thresholds.',
+    });
+
+    builder.addColorPicker({
+      path: 'highColour',
+      name: 'High battery colour',
+      defaultValue: '#4CAF50',
+      category: ['Colours'],
+      description: 'Colour when charge is above the high threshold.',
+    });
+
+    // -- Thresholds category --
+    builder.addNumberInput({
+      path: 'lowThreshold',
+      name: 'Low threshold (%)',
+      defaultValue: 30,
+      settings: { min: 0, max: 100, integer: true },
+      category: ['Thresholds'],
+      description: 'Charge level below which the low colour is used.',
+    });
+
+    builder.addNumberInput({
+      path: 'highThreshold',
+      name: 'High threshold (%)',
+      defaultValue: 70,
+      settings: { min: 0, max: 100, integer: true },
+      category: ['Thresholds'],
+      description: 'Charge level above which the high colour is used.',
+    });
+
+    // -- Appearance category --
+    builder.addBooleanSwitch({
+      path: 'gradientFill',
+      name: 'Gradient fill',
+      defaultValue: true,
+      category: ['Appearance'],
+      description: 'Show a gradient that hints at charging/discharging direction.',
+    });
+
+    builder.addSelect({
+      path: 'orientation',
+      name: 'Orientation',
+      defaultValue: 'vertical',
+      category: ['Appearance'],
+      settings: {
+        options: [
+          { value: 'vertical', label: 'Vertical' },
+          { value: 'horizontal', label: 'Horizontal' },
+        ],
+      },
+      description: 'Preferred orientation. Auto-reverts to vertical if the panel is too narrow for horizontal.',
+    });
+
+    builder.addBooleanSwitch({
+      path: 'chargingAnimation',
+      name: 'Charging animation',
+      defaultValue: true,
+      category: ['Appearance'],
+      description: 'Show a pulse animation when the battery is charging.',
+    });
+
+    builder.addNumberInput({
+      path: 'borderWidth',
+      name: 'Border width',
+      defaultValue: 3,
+      settings: { min: 1, max: 8, integer: true },
+      category: ['Appearance'],
+      description: 'Thickness of the battery outline.',
+    });
+
+    // -- Display category --
+    builder.addBooleanSwitch({
+      path: 'showPercentage',
+      name: 'Show percentage',
+      defaultValue: true,
+      category: ['Display'],
+      description: 'Show the percentage text inside the battery.',
+    });
+
+    builder.addBooleanSwitch({
+      path: 'showRate',
+      name: 'Show charge rate',
+      defaultValue: true,
+      category: ['Display'],
+      description: 'Show the rate of change (%/min).',
+    });
+
+    builder.addBooleanSwitch({
+      path: 'showLowHigh',
+      name: 'Show low / high',
+      defaultValue: true,
+      category: ['Display'],
+      description: 'Show the minimum and maximum values from the series.',
+    });
+
+    builder.addBooleanSwitch({
+      path: 'showStatus',
+      name: 'Show charging status',
+      defaultValue: true,
+      category: ['Display'],
+      description: 'Show Charging / Discharging / Stable indicator.',
+    });
+
+    // -- Data category --
+    builder.addNumberInput({
+      path: 'decimalPlaces',
+      name: 'Decimal places',
+      defaultValue: 2,
+      settings: { min: 0, max: 6, integer: true },
+      category: ['Data'],
+      description: 'Decimal places for rate / low / high values.',
+    });
+
+    builder.addBooleanSwitch({
+      path: 'useRegressionForRate',
+      name: 'Use regression for rate',
+      defaultValue: false,
+      category: ['Data'],
+      description: 'Compute %/min using least-squares regression instead of simple first/last difference.',
+    });
+
+    return builder;
+  }
+);

src/plugin.json

@@ -0,0 +1,25 @@
+{
+  "$schema": "https://raw.githubusercontent.com/grafana/grafana/main/docs/sources/developers/plugins/plugin.schema.json",
+  "type": "panel",
+  "name": "UPS Visualisation",
+  "id": "andydixon-chargevizbattery-panel",
+  "info": {
+    "keywords": ["panel"],
+    "description": "",
+    "author": {
+      "name": "Andy dixon"
+    },
+    "logos": {
+      "small": "img/logo.svg",
+      "large": "img/logo.svg"
+    },
+    "links": [],
+    "screenshots": [],
+    "version": "%VERSION%",
+    "updated": "%TODAY%"
+  },
+  "dependencies": {
+    "grafanaDependency": ">=10.4.0",
+    "plugins": []
+  }
+}

src/types.ts

@@ -0,0 +1,39 @@
+export type BatteryOrientation = 'vertical' | 'horizontal';
+
+export interface ChargeVizOptions {
+  // Field selectors
+  chargeField: string;
+  enableLoad: boolean;
+  loadField: string;
+  enableTimeLeft: boolean;
+  timeLeftField: string;
+  enableStateField: boolean;
+  stateField: string;
+  stateChargingValue: string;
+  stateDischargingValue: string;
+
+  // Colours
+  lowColour: string;
+  midColour: string;
+  highColour: string;
+
+  // Thresholds
+  lowThreshold: number;
+  highThreshold: number;
+
+  // Appearance
+  gradientFill: boolean;
+  orientation: BatteryOrientation;
+  chargingAnimation: boolean;
+  borderWidth: number;
+
+  // Data display
+  decimalPlaces: number;
+  useRegressionForRate: boolean;
+
+  // Visibility toggles
+  showPercentage: boolean;
+  showRate: boolean;
+  showLowHigh: boolean;
+  showStatus: boolean;
+}

tests/panel.spec.ts

@@ -0,0 +1,21 @@
+import { test, expect } from '@grafana/plugin-e2e';
+
+test('should display "No data" in case panel data is empty', async ({
+  gotoPanelEditPage,
+  readProvisionedDashboard,
+}) => {
+  const dashboard = await readProvisionedDashboard({ fileName: 'dashboard.json' });
+  const panelEditPage = await gotoPanelEditPage({ dashboard, id: '2' });
+  await expect(panelEditPage.panel.locator).toContainText('No data');
+});
+
+test('should display the battery panel when data is passed', async ({
+  panelEditPage,
+  readProvisionedDataSource,
+  page,
+}) => {
+  const ds = await readProvisionedDataSource({ fileName: 'datasources.yml' });
+  await panelEditPage.datasource.set(ds.name);
+  await panelEditPage.setVisualization('Battery Panel');
+  await expect(page.getByTestId('charge-viz-panel')).toBeVisible();
+});

tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "./.config/tsconfig.json"
+}