feat: backend timer logic and data persistence

1 files changed, 45 insertions, 0 deletions

diff --git a/src-tauri/src/state.rs b/src-tauri/src/state.rs
new file mode 100644
index 0000000..9cd3698
--- /dev/null
+++ b/src-tauri/src/state.rs
@@ -0,0 +1,45 @@
+use std::path::PathBuf;
+use std::sync::{Arc, Mutex};
+use serde::{Deserialize, Serialize};
+use crate::storage::AppData;
+
+#[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum TimerPhase {
+    Work,
+    ShortBreak,
+    LongBreak,
+}
+
+#[derive(Debug, Clone, Serialize)]
+pub struct TimerState {
+    pub phase: TimerPhase,
+    pub remaining_secs: u64,
+    pub total_secs: u64,
+    pub running: bool,
+    pub session_count: u32,
+    pub current_task_id: Option<String>,
+}
+
+/// Wrapper held in Tauri managed state — contains the Arc so commands can clone it.
+pub struct TimerStateWrapper(pub Arc<Mutex<TimerState>>);
+
+/// Wrapper for AppData — contains the Arc and the data directory path.
+pub struct AppDataWrapper {
+    pub data: Arc<Mutex<AppData>>,
+    #[allow(dead_code)]
+    pub data_dir: PathBuf,
+}
+
+impl TimerState {
+    pub fn new(work_duration_secs: u64) -> Self {
+        Self {
+            phase: TimerPhase::Work,
+            remaining_secs: work_duration_secs,
+            total_secs: work_duration_secs,
+            running: false,
+            session_count: 0,
+            current_task_id: None,
+        }
+    }
+}