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app.py

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+# -*- coding: utf-8 -*-
+import os
+import sqlite3
+from flask import Flask, request, jsonify, g
+
+app = Flask(__name__)
+
+DATABASE = os.path.join(os.path.dirname(__file__), "tasks.db")
+
+def get_db():
+    db = getattr(g, "_database", None)
+    if db is None:
+        db = g._database = sqlite3.connect(DATABASE)
+        db.row_factory = sqlite3.Row
+    return db
+
+def init_db():
+    conn = sqlite3.connect(DATABASE)
+    cursor = conn.cursor()
+    cursor.execute(
+        """
+        CREATE TABLE IF NOT EXISTS tasks (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            title TEXT NOT NULL,
+            completed INTEGER NOT NULL DEFAULT 0
+        )
+        """
+    )
+    conn.commit()
+    conn.close()
+
+@app.teardown_appcontext
+def close_connection(exception):
+    db = getattr(g, "_database", None)
+    if db is not None:
+        db.close()
+
+@app.route("/tasks", methods=["GET"])
+def list_tasks():
+    db = get_db()
+    cursor = db.execute("SELECT id, title, completed FROM tasks")
+    tasks = [
+        {"id": row["id"], "title": row["title"], "completed": bool(row["completed"])}
+        for row in cursor.fetchall()
+    ]
+    return jsonify(tasks)
+
+@app.route("/tasks", methods=["POST"])
+def create_task():
+    data = request.get_json()
+    title = data.get("title")
+    if not title:
+        return jsonify({"error": "title is required"}), 400
+    db = get_db()
+    cursor = db.execute(
+        "INSERT INTO tasks (title, completed) VALUES (?, ?)",
+        (title, 0),
+    )
+    db.commit()
+    task_id = cursor.lastrowid
+    return jsonify({"id": task_id, "title": title, "completed": False}), 201
+
+@app.route("/tasks/<int:task_id>", methods=["PUT"])
+def update_task(task_id):
+    data = request.get_json()
+    title = data.get("title")
+    completed = data.get("completed")
+    if title is None and completed is None:
+        return jsonify({"error": "nothing to update"}), 400
+    db = get_db()
+    if title is not None:
+        db.execute("UPDATE tasks SET title = ? WHERE id = ?", (title, task_id))
+    if completed is not None:
+        db.execute(
+            "UPDATE tasks SET completed = ? WHERE id = ?",
+            (1 if completed else 0, task_id),
+        )
+    db.commit()
+    return jsonify({"id": task_id, "title": title, "completed": completed})
+
+@app.route("/tasks/<int:task_id>", methods=["DELETE"])
+def delete_task(task_id):
+    db = get_db()
+    db.execute("DELETE FROM tasks WHERE id = ?", (task_id,))
+    db.commit()
+    return "", 204
+
+if __name__ == "__main__":
+    # Ensure the database exists before the first request
+    if not os.path.isfile(DATABASE):
+        init_db()
+    app.run(host="0.0.0.0", port=7860)