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|
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::Duration;
use serde::Serialize;
use tauri::{AppHandle, Emitter};
use crate::audio::{self, AudioEngine};
use crate::state::{TimerPhase, TimerState};
use crate::storage::{self, AppData};
fn persist_timer_state(data: &mut AppData, timer: &TimerState, data_dir: &std::path::PathBuf) {
data.current_task_id = timer.current_task_id.clone();
data.timer_snapshot = Some(timer.snapshot());
let _ = storage::save(data_dir, data);
}
// LOCK ORDERING: When acquiring multiple locks, always take timer_state
// before app_data to prevent deadlock. Never acquire app_data first
// while timer_state is not held.
// ── Event payloads ──────────────────────────────────────────────────────────
#[derive(Clone, Serialize)]
pub struct TickPayload {
pub phase: TimerPhase,
pub remaining_secs: u64,
pub total_secs: u64,
pub session_count: u32,
pub current_task_id: Option<String>,
}
#[derive(Clone, Serialize)]
pub struct PhaseChangedPayload {
pub phase: TimerPhase,
pub session_count: u32,
}
#[derive(Clone, Serialize)]
pub struct CompletedPayload {
pub task_id: Option<String>,
}
// ── Timer thread ────────────────────────────────────────────────────────────
/// Spawns the background timer thread. The thread runs for the lifetime of
/// the application; it sleeps while `running == false`.
pub fn spawn_timer_thread(
app_handle: AppHandle,
timer_arc: Arc<Mutex<TimerState>>,
data_arc: Arc<Mutex<AppData>>,
audio_arc: Arc<Mutex<Option<AudioEngine>>>,
data_dir: std::path::PathBuf,
) {
thread::spawn(move || {
loop {
thread::sleep(Duration::from_secs(1));
let mut ts = timer_arc.lock().unwrap();
if !ts.running {
continue;
}
// Decrement
if ts.remaining_secs > 0 {
ts.remaining_secs -= 1;
}
// Emit tick
let tick = TickPayload {
phase: ts.phase,
remaining_secs: ts.remaining_secs,
total_secs: ts.total_secs,
session_count: ts.session_count,
current_task_id: ts.current_task_id.clone(),
};
{
let mut data = data_arc.lock().unwrap();
persist_timer_state(&mut data, &ts, &data_dir);
}
let _ = app_handle.emit("timer-tick", tick);
// Check if phase has reached zero
if ts.remaining_secs == 0 {
ts.running = false;
let mut emit_completed = false;
let mut completed_task_id = None;
match ts.phase {
TimerPhase::Work => {
// Decrement task remaining sessions
let task_id = ts.current_task_id.clone();
{
let mut data = data_arc.lock().unwrap();
if let Some(ref tid) = task_id {
if let Some(task) = data.tasks.iter_mut().find(|t| &t.id == tid) {
if task.remaining_sessions > 0 {
task.remaining_sessions -= 1;
}
if task.remaining_sessions == 0 {
task.completed = true;
}
}
}
}
emit_completed = true;
completed_task_id = task_id;
ts.session_count += 1;
// Determine next phase
let (next_phase, next_duration) = {
let data = data_arc.lock().unwrap();
let s = &data.settings;
if ts.session_count % s.sessions_before_long_break == 0 {
(TimerPhase::LongBreak, s.long_break_secs)
} else {
(TimerPhase::ShortBreak, s.short_break_secs)
}
};
ts.phase = next_phase;
ts.total_secs = next_duration;
ts.remaining_secs = next_duration;
}
TimerPhase::ShortBreak | TimerPhase::LongBreak => {
// Transition back to work
let work_secs = {
let data = data_arc.lock().unwrap();
data.settings.work_duration_secs
};
ts.phase = TimerPhase::Work;
ts.total_secs = work_secs;
ts.remaining_secs = work_secs;
}
}
{
let mut data = data_arc.lock().unwrap();
persist_timer_state(&mut data, &ts, &data_dir);
}
// Emit phase-changed after state is updated
if let Some(engine) = audio_arc.lock().unwrap().as_mut() {
if audio::should_duck_for_phase(ts.phase) {
engine.duck();
} else {
engine.unduck();
}
}
if emit_completed {
let completed = CompletedPayload {
task_id: completed_task_id,
};
let _ = app_handle.emit("timer-completed", completed);
}
let phase_changed = PhaseChangedPayload {
phase: ts.phase,
session_count: ts.session_count,
};
let _ = app_handle.emit("timer-phase-changed", phase_changed);
}
}
});
}
|
