From a3ea37baa1eed525e4080e5cac6795e4f44eb640 Mon Sep 17 00:00:00 2001
From: Your Name <you@example.com>
Date: Fri, 20 Feb 2026 15:15:50 +0200
Subject: [PATCH] feat: timesheet row persistence backend

---
 src-tauri/src/commands.rs | 67 +++++++++++++++++++++++++++++++++++++++
 src-tauri/src/database.rs | 11 +++++++
 src-tauri/src/lib.rs      |  3 ++
 3 files changed, 81 insertions(+)

diff --git a/src-tauri/src/commands.rs b/src-tauri/src/commands.rs
index dab89b7..3869bd3 100644
--- a/src-tauri/src/commands.rs
+++ b/src-tauri/src/commands.rs
@@ -2407,6 +2407,73 @@ pub fn delete_entry_template(state: State<AppState>, id: i64) -> Result<(), Stri
     Ok(())
 }
 
+#[tauri::command]
+pub fn get_timesheet_rows(state: State<AppState>, week_start: String) -> Result<Vec<serde_json::Value>, String> {
+    let conn = state.db.lock().map_err(|e| e.to_string())?;
+    let mut stmt = conn.prepare(
+        "SELECT id, week_start, project_id, task_id, sort_order FROM timesheet_rows WHERE week_start = ?1 ORDER BY sort_order"
+    ).map_err(|e| e.to_string())?;
+    let rows = stmt.query_map(params![week_start], |row| {
+        Ok(serde_json::json!({
+            "id": row.get::<_, i64>(0)?,
+            "week_start": row.get::<_, String>(1)?,
+            "project_id": row.get::<_, i64>(2)?,
+            "task_id": row.get::<_, Option<i64>>(3)?,
+            "sort_order": row.get::<_, i64>(4)?,
+        }))
+    }).map_err(|e| e.to_string())?;
+    Ok(rows.filter_map(|r| r.ok()).collect())
+}
+
+#[tauri::command]
+pub fn save_timesheet_rows(state: State<AppState>, week_start: String, rows: Vec<serde_json::Value>) -> Result<(), String> {
+    let conn = state.db.lock().map_err(|e| e.to_string())?;
+    conn.execute("BEGIN TRANSACTION", []).map_err(|e| e.to_string())?;
+
+    if let Err(e) = conn.execute("DELETE FROM timesheet_rows WHERE week_start = ?1", params![week_start]) {
+        let _ = conn.execute("ROLLBACK", []);
+        return Err(e.to_string());
+    }
+
+    for (i, row) in rows.iter().enumerate() {
+        let project_id = row.get("project_id").and_then(|v| v.as_i64()).unwrap_or(0);
+        let task_id = row.get("task_id").and_then(|v| v.as_i64());
+        if let Err(e) = conn.execute(
+            "INSERT INTO timesheet_rows (week_start, project_id, task_id, sort_order) VALUES (?1, ?2, ?3, ?4)",
+            params![week_start, project_id, task_id, i as i64],
+        ) {
+            let _ = conn.execute("ROLLBACK", []);
+            return Err(e.to_string());
+        }
+    }
+
+    conn.execute("COMMIT", []).map_err(|e| e.to_string())?;
+    Ok(())
+}
+
+#[tauri::command]
+pub fn get_previous_week_structure(state: State<AppState>, current_week_start: String) -> Result<Vec<serde_json::Value>, String> {
+    let conn = state.db.lock().map_err(|e| e.to_string())?;
+    let current = chrono::NaiveDate::parse_from_str(&current_week_start, "%Y-%m-%d")
+        .map_err(|e| e.to_string())?;
+    let prev = current - chrono::Duration::days(7);
+    let prev_str = prev.format("%Y-%m-%d").to_string();
+
+    let mut stmt = conn.prepare(
+        "SELECT id, week_start, project_id, task_id, sort_order FROM timesheet_rows WHERE week_start = ?1 ORDER BY sort_order"
+    ).map_err(|e| e.to_string())?;
+    let rows = stmt.query_map(params![prev_str], |row| {
+        Ok(serde_json::json!({
+            "id": row.get::<_, i64>(0)?,
+            "week_start": row.get::<_, String>(1)?,
+            "project_id": row.get::<_, i64>(2)?,
+            "task_id": row.get::<_, Option<i64>>(3)?,
+            "sort_order": row.get::<_, i64>(4)?,
+        }))
+    }).map_err(|e| e.to_string())?;
+    Ok(rows.filter_map(|r| r.ok()).collect())
+}
+
 fn format_seconds_as_time(secs: i64) -> String {
     let h = secs / 3600;
     let m = (secs % 3600) / 60;
diff --git a/src-tauri/src/database.rs b/src-tauri/src/database.rs
index 2a1451f..a9a3586 100644
--- a/src-tauri/src/database.rs
+++ b/src-tauri/src/database.rs
@@ -326,6 +326,17 @@ pub fn init_db(conn: &Connection) -> Result<(), rusqlite::Error> {
         [],
     )?;
 
+    conn.execute(
+        "CREATE TABLE IF NOT EXISTS timesheet_rows (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            week_start TEXT NOT NULL,
+            project_id INTEGER NOT NULL REFERENCES projects(id),
+            task_id INTEGER REFERENCES tasks(id),
+            sort_order INTEGER NOT NULL DEFAULT 0
+        )",
+        [],
+    )?;
+
     conn.execute(
         "CREATE TABLE IF NOT EXISTS settings (
             key TEXT PRIMARY KEY,
diff --git a/src-tauri/src/lib.rs b/src-tauri/src/lib.rs
index c13e724..1286843 100644
--- a/src-tauri/src/lib.rs
+++ b/src-tauri/src/lib.rs
@@ -135,6 +135,9 @@ pub fn run() {
             commands::get_entry_templates,
             commands::create_entry_template,
             commands::delete_entry_template,
+            commands::get_timesheet_rows,
+            commands::save_timesheet_rows,
+            commands::get_previous_week_structure,
         ])
         .setup(|app| {
             #[cfg(desktop)]