From 158f529e1ca0ed04ddb52eaf12ff70373282c20a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pablo=20P=C3=A9rez=20Arcas?=
 <pablo.perez.arcas@student.tuke.sk>
Date: Mon, 30 Mar 2026 08:21:48 +0000
Subject: [PATCH] =?UTF-8?q?A=C3=B1adir=20z1/backend/app.py?=
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---
 z1/backend/app.py | 93 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 z1/backend/app.py

diff --git a/z1/backend/app.py b/z1/backend/app.py
new file mode 100644
index 0000000..0a80829
--- /dev/null
+++ b/z1/backend/app.py
@@ -0,0 +1,93 @@
+from flask import Flask, request, jsonify
+from flask_cors import CORS
+import os
+import psycopg2
+import time
+
+app = Flask(__name__)
+CORS(app)
+
+DB_HOST = os.getenv("DB_HOST", "db")
+DB_NAME = os.getenv("DB_NAME", "notesdb")
+DB_USER = os.getenv("DB_USER", "notesuser")
+DB_PASSWORD = os.getenv("DB_PASSWORD", "notessecret")
+DB_PORT = os.getenv("DB_PORT", "5432")
+
+def get_connection():
+    return psycopg2.connect(
+        host=DB_HOST,
+        database=DB_NAME,
+        user=DB_USER,
+        password=DB_PASSWORD,
+        port=DB_PORT
+    )
+
+def init_db():
+    for _ in range(20):
+        try:
+            conn = get_connection()
+            cur = conn.cursor()
+            cur.execute("""
+                CREATE TABLE IF NOT EXISTS notes (
+                    id SERIAL PRIMARY KEY,
+                    content TEXT NOT NULL
+                );
+            """)
+            conn.commit()
+            cur.close()
+            conn.close()
+            return
+        except Exception:
+            time.sleep(2)
+    raise Exception("Database not ready")
+
+@app.route("/api/health", methods=["GET"])
+def health():
+    return jsonify({"status": "ok"})
+
+@app.route("/api/notes", methods=["GET"])
+def get_notes():
+    conn = get_connection()
+    cur = conn.cursor()
+    cur.execute("SELECT id, content FROM notes ORDER BY id DESC;")
+    rows = cur.fetchall()
+    cur.close()
+    conn.close()
+    return jsonify([{"id": r[0], "content": r[1]} for r in rows])
+
+@app.route("/api/notes", methods=["POST"])
+def add_note():
+    data = request.get_json()
+    content = data.get("content", "").strip()
+
+    if not content:
+        return jsonify({"error": "Content is required"}), 400
+
+    conn = get_connection()
+    cur = conn.cursor()
+    cur.execute("INSERT INTO notes (content) VALUES (%s) RETURNING id;", (content,))
+    note_id = cur.fetchone()[0]
+    conn.commit()
+    cur.close()
+    conn.close()
+
+    return jsonify({"id": note_id, "content": content}), 201
+
+@app.route("/api/notes/<int:note_id>", methods=["DELETE"])
+def delete_note(note_id):
+    conn = get_connection()
+    cur = conn.cursor()
+    cur.execute("DELETE FROM notes WHERE id = %s RETURNING id;", (note_id,))
+    deleted = cur.fetchone()
+    conn.commit()
+    cur.close()
+    conn.close()
+
+    if deleted is None:
+        return jsonify({"error": "Note not found"}), 404
+
+    return jsonify({"message": "Note deleted successfully"})
+
+if __name__ == "__main__":
+    init_db()
+    app.run(host="0.0.0.0", port=5000)
\ No newline at end of file