rust: snippets, triggers, recordings and playback

rust/app/src/triggers.rs

@@ -1,11 +1,92 @@
-//! Trigger rules: match terminal output lines and notify / highlight / beep.
-//! STUB — interface fixed; implementation pending.
+//! Trigger rules: match terminal output lines and notify / highlight / beep (port of triggers.js).
+//! Rules live in `triggers.json` in the data directory (the web build's localStorage rules are
+//! not migrated).
 
 use crate::state::Shared;
+use crate::theme::{self, Tokens};
+use crate::widgets;
+use egui::RichText;
+use egui_phosphor::regular as icon;
+use regex::{Regex, RegexBuilder};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+use std::path::PathBuf;
+use std::sync::LazyLock;
+
+const ACTIONS: [(&str, &str); 4] = [("notify", "Notify"), ("highlight", "Highlight tab"), ("both", "Notify + Highlight"), ("sound", "Sound")];
+
+#[derive(Clone, Debug, Default, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase", default)]
+pub struct Rule {
+    pub name: String,
+    pub pattern: String,
+    pub is_regex: bool,
+    pub action: String,
+    pub case_sensitive: bool,
+    pub enabled: bool,
+    #[serde(skip)]
+    re: Option<Regex>,
+}
+
+impl Rule {
+    fn compile(&mut self) -> Result<(), regex::Error> {
+        self.re = None;
+        if self.is_regex {
+            self.re = Some(RegexBuilder::new(&self.pattern).case_insensitive(!self.case_sensitive).build()?);
+        }
+        Ok(())
+    }
+
+    /// Whether `line` (already ANSI-stripped) matches. An invalid regex never matches.
+    pub fn matches(&self, line: &str) -> bool {
+        if self.is_regex {
+            self.re.as_ref().is_some_and(|r| r.is_match(line))
+        } else if self.case_sensitive {
+            line.contains(&self.pattern)
+        } else {
+            line.to_lowercase().contains(&self.pattern.to_lowercase())
+        }
+    }
+}
+
+/// Strips CSI sequences exactly as the JS did (`/\x1b\[[0-9;]*[a-zA-Z]/g`).
+pub fn strip_ansi(line: &str) -> std::borrow::Cow<'_, str> {
+    static RE: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"\x1b\[[0-9;]*[a-zA-Z]").unwrap());
+    RE.replace_all(line, "")
+}
+
+/// Appends `data` to the session buffer and returns every completed line; the trailing partial
+/// line stays buffered.
+pub fn complete_lines(buf: &mut Vec<u8>, data: &[u8]) -> Vec<String> {
+    buf.extend_from_slice(data);
+    let Some(last) = buf.iter().rposition(|&b| b == b'\n') else {
+        // ponytail: a line with no newline is capped at 64 KiB (keeps the tail) so a stream
+        // without newlines can't grow forever.
+        if buf.len() > 64 * 1024 {
+            buf.drain(..buf.len() - 64 * 1024);
+        }
+        return vec![];
+    };
+    let rest = buf.split_off(last + 1);
+    let done = std::mem::replace(buf, rest);
+    done[..done.len() - 1].split(|&b| b == b'\n').map(|l| String::from_utf8_lossy(l).into_owned()).collect()
+}
+
+enum Form {
+    New(Rule),
+    Edit(usize, Rule),
+}
 
 #[derive(Default)]
 pub struct Triggers {
     open: bool,
+    rules: Option<Vec<Rule>>,
+    buffers: HashMap<String, Vec<u8>>,
+    form: Option<Form>,
+}
+
+fn path(s: &Shared) -> PathBuf {
+    s.svc.config.data_dir.join("triggers.json")
 }
 
 impl Triggers {
@@ -13,13 +94,226 @@ impl Triggers {
         self.open = true;
     }
 
-    /// Feeds session output; fires matching rules (toasts, highlight request, bell).
-    /// Returns true if the tab should be highlighted.
-    pub fn check(&mut self, _s: &mut Shared, _session: &str, _data: &[u8]) -> bool {
-        false
+    fn rules(&mut self, s: &Shared) -> &mut Vec<Rule> {
+        self.rules.get_or_insert_with(|| {
+            let mut v: Vec<Rule> = std::fs::read(path(s)).ok().and_then(|b| serde_json::from_slice(&b).ok()).unwrap_or_default();
+            v.iter_mut().for_each(|r| drop(r.compile()));
+            v
+        })
     }
 
-    pub fn cleanup(&mut self, _session: &str) {}
+    fn save(&mut self, s: &mut Shared) {
+        let json = serde_json::to_vec_pretty(self.rules(s)).unwrap_or_default();
+        if let Err(e) = std::fs::write(path(s), json) {
+            s.error(format!("Failed to save trigger rules: {e}"));
+        }
+    }
 
-    pub fn ui(&mut self, _ctx: &egui::Context, _s: &mut Shared) {}
+    /// Feeds session output; fires matching rules (toasts, highlight request, bell).
+    /// Returns true if the tab should be highlighted.
+    pub fn check(&mut self, s: &mut Shared, session: &str, data: &[u8]) -> bool {
+        if self.rules(s).is_empty() {
+            return false;
+        }
+        let lines = complete_lines(self.buffers.entry(session.to_owned()).or_default(), data);
+        let mut highlight = false;
+        let label = s.pane(session).map(|p| if p.info.tab_name.is_empty() { p.info.profile_name.clone() } else { p.info.tab_name.clone() }).unwrap_or_else(|| session.to_owned());
+        let mut fired: Vec<(String, String)> = vec![];
+        for line in &lines {
+            let clean = strip_ansi(line);
+            for r in self.rules(s).iter().filter(|r| r.enabled && r.matches(&clean)) {
+                let name = if r.name.is_empty() { r.pattern.clone() } else { r.name.clone() };
+                fired.push((r.action.clone(), name));
+            }
+        }
+        for (action, name) in fired {
+            let msg = format!("[{label}] Trigger: {name}");
+            match action.as_str() {
+                "notify" => s.info(msg),
+                "highlight" => highlight = true,
+                "both" => {
+                    s.info(msg);
+                    highlight = true;
+                }
+                "sound" => {
+                    s.ctx.send_viewport_cmd(egui::ViewportCommand::RequestUserAttention(egui::UserAttentionType::Informational));
+                    s.info(format!("{} {msg}", icon::BELL_RINGING));
+                }
+                _ => {}
+            }
+        }
+        highlight
+    }
+
+    pub fn cleanup(&mut self, session: &str) {
+        self.buffers.remove(session);
+    }
+
+    pub fn ui(&mut self, ctx: &egui::Context, s: &mut Shared) {
+        if !self.open {
+            return;
+        }
+        let mut open = self.open;
+        egui::Window::new(format!("{}  Trigger Rules", icon::LIGHTNING))
+            .id(egui::Id::new("triggers"))
+            .open(&mut open)
+            .collapsible(false)
+            .default_size([620.0, 380.0])
+            .show(ctx, |ui| {
+                widgets::hint(ui, "Rules match against terminal output and fire actions when a pattern is detected.");
+                ui.add_space(4.0);
+                if self.form.is_some() {
+                    self.form_ui(ui, s);
+                } else {
+                    self.list_ui(ui, s);
+                }
+            });
+        self.open = open;
+    }
+
+    fn list_ui(&mut self, ui: &mut egui::Ui, s: &mut Shared) {
+        let t = Tokens::get(ui.ctx());
+        if widgets::primary(ui, icon::PLUS, "Add Rule").clicked() {
+            self.form = Some(Form::New(Rule { action: "notify".into(), enabled: true, ..Default::default() }));
+        }
+        ui.add_space(4.0);
+        let (mut changed, mut edit, mut delete) = (false, None, None);
+        let rules = self.rules(s);
+        if rules.is_empty() {
+            widgets::empty(ui, icon::LIGHTNING, "No trigger rules defined", "Add a rule to watch terminal output");
+            return;
+        }
+        egui::ScrollArea::vertical().auto_shrink([false, true]).show(ui, |ui| {
+            ui.style_mut().wrap_mode = Some(egui::TextWrapMode::Extend);
+            egui::Grid::new("trigger-rules").num_columns(4).striped(true).spacing([12.0, 6.0]).show(ui, |ui| {
+                for (i, r) in rules.iter_mut().enumerate() {
+                    changed |= ui.checkbox(&mut r.enabled, "").on_hover_text("Enabled").changed();
+                    ui.vertical(|ui| {
+                        ui.label(RichText::new(if r.name.is_empty() { &r.pattern } else { &r.name }).font(theme::semibold(13.0)));
+                        let action = ACTIONS.iter().find(|a| a.0 == r.action).map_or(r.action.as_str(), |a| a.1);
+                        let meta = format!("{} · {action} · {}", if r.is_regex { "Regex" } else { "Text" }, if r.case_sensitive { "Case-sensitive" } else { "Case-insensitive" });
+                        ui.label(RichText::new(meta).size(11.5).color(t.text_dim));
+                    });
+                    ui.label(RichText::new(&r.pattern).font(theme::mono(12.0)).color(if r.is_regex && r.re.is_none() { t.danger } else { t.text }));
+                    ui.horizontal(|ui| {
+                        if widgets::icon_button(ui, icon::PENCIL_SIMPLE, "Edit").clicked() {
+                            edit = Some(i);
+                        }
+                        if widgets::icon_button(ui, icon::TRASH, "Delete").clicked() {
+                            delete = Some(i);
+                        }
+                    });
+                    ui.end_row();
+                }
+            });
+        });
+        if let Some(i) = delete {
+            rules.remove(i);
+            changed = true;
+        } else if let Some(i) = edit {
+            let rule = rules[i].clone();
+            self.form = Some(Form::Edit(i, rule));
+        }
+        if changed {
+            self.save(s);
+        }
+    }
+
+    fn form_ui(&mut self, ui: &mut egui::Ui, s: &mut Shared) {
+        let Some(form) = &mut self.form else { return };
+        let (is_new, r) = match form {
+            Form::New(r) => (true, r),
+            Form::Edit(_, r) => (false, r),
+        };
+        egui::Grid::new("trigger-form").num_columns(2).spacing([10.0, 8.0]).show(ui, |ui| {
+            ui.label("Name (optional)");
+            ui.add(egui::TextEdit::singleline(&mut r.name).hint_text("e.g. Error alert").desired_width(320.0));
+            ui.end_row();
+            ui.label("Pattern");
+            ui.add(egui::TextEdit::singleline(&mut r.pattern).hint_text("e.g. ERROR|FATAL|panic").font(theme::mono(12.5)).desired_width(320.0));
+            ui.end_row();
+            ui.label("Match type");
+            egui::ComboBox::from_id_salt("trigger-type").selected_text(if r.is_regex { "Regex" } else { "Plain text" }).show_ui(ui, |ui| {
+                ui.selectable_value(&mut r.is_regex, false, "Plain text");
+                ui.selectable_value(&mut r.is_regex, true, "Regex");
+            });
+            ui.end_row();
+            ui.label("Action");
+            let cur = ACTIONS.iter().find(|a| a.0 == r.action).map_or("Notify", |a| a.1);
+            egui::ComboBox::from_id_salt("trigger-action").selected_text(cur).show_ui(ui, |ui| {
+                for (id, label) in ACTIONS {
+                    if ui.selectable_label(r.action == id, label).clicked() {
+                        r.action = id.into();
+                    }
+                }
+            });
+            ui.end_row();
+            ui.label("");
+            ui.checkbox(&mut r.case_sensitive, "Case-sensitive");
+            ui.end_row();
+        });
+        ui.add_space(8.0);
+        let (mut save, mut cancel) = (false, false);
+        ui.horizontal(|ui| {
+            save = widgets::primary(ui, icon::CHECK, if is_new { "Add" } else { "Save" }).clicked();
+            cancel = ui.button("Cancel").clicked();
+        });
+        if cancel {
+            self.form = None;
+        } else if save {
+            let mut rule = r.clone();
+            rule.name = rule.name.trim().to_owned();
+            rule.pattern = rule.pattern.trim().to_owned();
+            if rule.pattern.is_empty() {
+                return s.error("Pattern is required");
+            }
+            if let Err(e) = rule.compile() {
+                return s.error(format!("Invalid regex: {e}"));
+            }
+            let form = self.form.take();
+            let rules = self.rules(s);
+            match form {
+                Some(Form::Edit(i, _)) if i < rules.len() => rules[i] = rule,
+                _ => rules.push(rule),
+            }
+            self.save(s);
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn line_buffering() {
+        let mut b = vec![];
+        assert!(complete_lines(&mut b, b"par").is_empty());
+        assert_eq!(complete_lines(&mut b, b"tial\nnext\n\nlast"), ["partial", "next", ""]);
+        assert_eq!(b, b"last");
+        assert_eq!(complete_lines(&mut b, b"\n"), ["last"]);
+        assert!(b.is_empty());
+        // A UTF-8 char split across chunks survives.
+        let e = "é".as_bytes();
+        complete_lines(&mut b, &e[..1]);
+        assert_eq!(complete_lines(&mut b, &[e[1], b'\n']), ["é"]);
+    }
+
+    #[test]
+    fn ansi_strip_and_match() {
+        assert_eq!(strip_ansi("\x1b[1;31mERROR\x1b[0m: disk\x1b[K"), "ERROR: disk");
+        // Only CSI with digits/semicolons is stripped, as in the JS.
+        assert_eq!(strip_ansi("\x1b[?25lx\x1b]0;t\x07"), "\x1b[?25lx\x1b]0;t\x07");
+        let mut r = Rule { pattern: "error|fatal".into(), is_regex: true, enabled: true, ..Default::default() };
+        r.compile().unwrap();
+        assert!(r.matches(&strip_ansi("\x1b[31mFATAL\x1b[0m")));
+        r.case_sensitive = true;
+        r.compile().unwrap();
+        assert!(!r.matches("FATAL"));
+        let r = Rule { pattern: "Disk Full".into(), ..Default::default() };
+        assert!(r.matches("warning: disk full"));
+        let mut bad = Rule { pattern: "(".into(), is_regex: true, ..Default::default() };
+        assert!(bad.compile().is_err());
+        assert!(!bad.matches("("));
+    }
 }