Add created_at/updated_at to Task model, DB, and API

- Add created_at and updated_at fields to Task struct
- Preserve existing created_at on upsert in insert_task
- Parse updated field from Google Tasks API response
- Add created_at column to DB schema with migration

src/app.rs

@@ -537,6 +537,8 @@ impl App {
                             status: TaskStatus::NeedsAction,
                             due: None,
                             position: 0,
+                            created_at: None,
+                            updated_at: None,
                         };
                         self.db.insert_task(&task).ok();
                         self.db.push_sync(

src/domain/models.rs

@@ -16,6 +16,8 @@ pub struct Task {
     pub status: TaskStatus,
     pub due: Option<NaiveDateTime>,
     pub position: i64,
+    pub created_at: Option<NaiveDateTime>,
+    pub updated_at: Option<NaiveDateTime>,
 }
 
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]

src/infrastructure/api.rs

@@ -181,6 +181,18 @@ impl ApiClient {
                     .ok()
                 });
 
+                let updated = item["updated"].as_str().and_then(|s| {
+                    chrono::NaiveDateTime::parse_from_str(
+                        &s.replace("T", " ")
+                            .replace("Z", "")
+                            .chars()
+                            .take(19)
+                            .collect::<String>(),
+                        "%Y-%m-%d %H:%M:%S",
+                    )
+                    .ok()
+                });
+
                 Task {
                     id: item["id"].as_str().unwrap_or("").to_string(),
                     list_id: list_id.to_string(),
@@ -193,6 +205,8 @@ impl ApiClient {
                     },
                     due: due_str,
                     position: i as i64,
+                    created_at: None,
+                    updated_at: updated,
                 }
             })
             .collect();
@@ -261,6 +275,18 @@ impl ApiClient {
                     .ok()
                 });
 
+                let updated = item["updated"].as_str().and_then(|s| {
+                    chrono::NaiveDateTime::parse_from_str(
+                        &s.replace("T", " ")
+                            .replace("Z", "")
+                            .chars()
+                            .take(19)
+                            .collect::<String>(),
+                        "%Y-%m-%d %H:%M:%S",
+                    )
+                    .ok()
+                });
+
                 Task {
                     id: item["id"].as_str().unwrap_or("").to_string(),
                     list_id: list_id.to_string(),
@@ -273,6 +299,8 @@ impl ApiClient {
                     },
                     due: due_str,
                     position: i as i64,
+                    created_at: None,
+                    updated_at: updated,
                 }
             })
             .collect();

src/infrastructure/db.rs

@@ -28,6 +28,7 @@ impl Db {
                 due TEXT,
                 position INTEGER NOT NULL DEFAULT 0,
                 updated_at TEXT NOT NULL,
+                created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%d %H:%M:%S', 'now')),
                 FOREIGN KEY (list_id) REFERENCES task_lists(id) ON DELETE CASCADE
             );
 
@@ -45,6 +46,10 @@ impl Db {
             "ALTER TABLE sync_queue ADD COLUMN retries INTEGER NOT NULL DEFAULT 0;",
         )
         .ok();
+        conn.execute_batch(
+            "ALTER TABLE tasks ADD COLUMN created_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%d %H:%M:%S', 'now'));",
+        )
+        .ok();
         Ok(Self { conn: Mutex::new(conn) })
     }
 
@@ -84,13 +89,15 @@ impl Db {
         let conn = self.conn.lock().unwrap();
         let mut stmt = conn
             .prepare(
-                "SELECT id, list_id, title, notes, status, due, position
+                "SELECT id, list_id, title, notes, status, due, position, created_at, updated_at
                  FROM tasks WHERE list_id = ?1 ORDER BY position ASC",
             )
             .unwrap();
         stmt.query_map(params![list_id], |row| {
             let due_str: Option<String> = row.get(5)?;
             let due = due_str.and_then(|s| NaiveDateTime::parse_from_str(&s, "%Y-%m-%d %H:%M").ok());
+            let created_str: String = row.get(7)?;
+            let updated_str: String = row.get(8)?;
             Ok(Task {
                 id: row.get(0)?,
                 list_id: row.get(1)?,
@@ -102,6 +109,8 @@ impl Db {
                 },
                 due,
                 position: row.get(6)?,
+                created_at: NaiveDateTime::parse_from_str(&created_str, "%Y-%m-%d %H:%M:%S").ok(),
+                updated_at: NaiveDateTime::parse_from_str(&updated_str, "%Y-%m-%d %H:%M:%S").ok(),
             })
         })
         .unwrap()
@@ -126,9 +135,26 @@ impl Db {
         } else {
             task.position
         };
+
+        // Preserve existing created_at if the task already exists
+        let created_at = task.created_at.unwrap_or_else(|| {
+            conn.query_row(
+                "SELECT created_at FROM tasks WHERE id = ?1",
+                params![task.id],
+                |row| row.get::<_, String>(0),
+            )
+            .ok()
+            .and_then(|s| NaiveDateTime::parse_from_str(&s, "%Y-%m-%d %H:%M:%S").ok())
+            .unwrap_or_else(|| chrono::Utc::now().naive_utc())
+        });
+
+        let updated_at = task
+            .updated_at
+            .unwrap_or_else(|| chrono::Utc::now().naive_utc());
+
         conn.execute(
-            "INSERT OR REPLACE INTO tasks (id, list_id, title, notes, status, due, position, updated_at)
+            "INSERT OR REPLACE INTO tasks (id, list_id, title, notes, status, due, position, updated_at, created_at)
-             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8)",
+             VALUES (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9)",
             params![
                 task.id,
                 task.list_id,
@@ -137,7 +163,8 @@ impl Db {
                 status_str,
                 due_str,
                 position,
-                chrono::Utc::now().format("%Y-%m-%d %H:%M:%S").to_string(),
+                updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
+                created_at.format("%Y-%m-%d %H:%M:%S").to_string(),
             ],
         )?;
         Ok(())
@@ -149,6 +176,9 @@ impl Db {
             TaskStatus::Completed => "completed",
             TaskStatus::NeedsAction => "needsAction",
         };
+        let updated_at = task
+            .updated_at
+            .unwrap_or_else(|| chrono::Utc::now().naive_utc());
         let conn = self.conn.lock().unwrap();
         conn.execute(
             "UPDATE tasks SET title=?1, notes=?2, status=?3, due=?4, position=?5, updated_at=?6
@@ -159,7 +189,7 @@ impl Db {
                 status_str,
                 due_str,
                 task.position,
-                chrono::Utc::now().format("%Y-%m-%d %H:%M:%S").to_string(),
+                updated_at.format("%Y-%m-%d %H:%M:%S").to_string(),
                 task.id,
             ],
         )?;

src/main.rs

@@ -255,6 +255,8 @@ async fn push_sync(
                     status: TaskStatus::NeedsAction,
                     due: None,
                     position: 0,
+                    created_at: None,
+                    updated_at: None,
                 });
                 api.create_task(&item.list_id, &task).await
             }
@@ -267,6 +269,8 @@ async fn push_sync(
                     status: TaskStatus::NeedsAction,
                     due: None,
                     position: 0,
+                    created_at: None,
+                    updated_at: None,
                 });
                 api.update_task(&item.list_id, &task).await
             }