modularize src

+ merge main.py and manage.py
+ move start logic to swingmusic/__main__.py
+ add a run.py on the project root

swingmusic/utils/auth.py

@@ -0,0 +1,43 @@
+import hmac
+import hashlib
+
+from flask_jwt_extended import current_user
+
+from swingmusic.config import UserConfig
+
+
+def hash_password(password: str) -> str:
+    """
+    Hashes the given password using sha256 algorithm and the user id as salt.
+
+    :param password: The password to hash.
+
+    :return: The hashed password.
+    """
+    return hashlib.pbkdf2_hmac(
+        "sha256", password.encode("utf-8"), UserConfig().serverId.encode("utf-8"), 100000
+    ).hex()
+
+
+def check_password(password: str, hashed: str) -> bool:
+    """
+    This function checks if the given password matches the hashed password.
+
+    :param password: The password to check.
+    :param hashed: The hashed password.
+
+    :return: Whether the password matches.
+    """
+
+    return hmac.compare_digest(hash_password(password), hashed)
+
+
+def get_current_userid() -> int:
+    """
+    Get the current session user.
+    """
+    try:
+        return current_user["id"]
+    except RuntimeError:
+        # Catch this error raised during migration execution
+        return 1