ported backend to python

src/routes/answers.py

@@ -0,0 +1,55 @@
+# routes/answers.py
+from flask import Blueprint, request, jsonify, current_app
+from utils.errors import InvalidJsonFormatError
+from utils.process_data import evaluate_comments
+import json
+
+router = Blueprint('answers', __name__, url_prefix='/answers')
+
+ALLOWED_EXT = {'json'}
+
+
+def validate_json_format(data: str) -> dict[str, str]:
+    try:
+        obj = json.loads(data)
+        if not isinstance(obj, dict):
+            raise InvalidJsonFormatError("Submitted json doesn't contain an object")
+        if not all(isinstance(v, str) for v in obj.values()):
+            raise InvalidJsonFormatError(
+                "Submitted json object must only be str -> str. Namely id -> comment"
+            )
+        return obj
+    except InvalidJsonFormatError as e:
+        raise e
+    except Exception:
+        raise InvalidJsonFormatError()
+
+
+@router.route('/submit/comments', methods=['POST'])
+def submit_comments():
+    file = request.files.get('file')
+    if file is None or file.filename is None or file.filename.split('.')[-1] not in ALLOWED_EXT:
+        return jsonify({'error': 'Only JSON files are allowed'}), 400
+    data = file.read().decode()
+    try:
+        validated = validate_json_format(data)
+    except InvalidJsonFormatError as e:
+        return jsonify({'error': 'Invalid JSON format', 'message': str(e)}), 400
+
+    socketio = current_app.extensions['socketio']
+    sid = request.headers.get('X-Socket-Id')
+    if sid:
+        socketio.emit('successful-upload', room=sid)
+        socketio.emit('started-processing', room=sid)
+
+    results = evaluate_comments(
+        validated, lambda p: socketio.emit('progress', {'percent': p}, room=sid)
+    )
+    return jsonify(results)
+
+
+@router.route('/submit/refinement', methods=['POST'])
+def submit_refinement():
+    file = request.files.get('file')
+    # similar to above
+    return jsonify({'message': 'Answer submitted successfully'})