Implement EventID to scope ClientIDs and Entry IDs

Implement an EventID saved in settings. Currently this is used to scope
clientIDs and entryIDs to an event. The client checks the event currently going on on
the server, and discards its localstorage (containing the clientID) if
it has changed

backend/database.py

@@ -4,6 +4,7 @@ from sqlalchemy import create_engine, engine, text
 import pandas
 from io import StringIO
 from flask import current_app
+import uuid
 
 song_table = "songs"
 entry_table = "entries"
@@ -16,7 +17,6 @@ sql_engine = None
 def get_db_engine() -> engine.base.Engine:
     global sql_engine
     if (not sql_engine):
-        print(current_app.config.get("DBCONNSTRING"))
         sql_engine = create_engine(
             current_app.config.get("DBCONNSTRING"))  # type: ignore
     return sql_engine
@@ -189,6 +189,26 @@ def clear_played_songs():
     return True
 
 
+def get_entry(id):
+    try:
+        with get_db_engine().connect() as conn:
+            cur = conn.execute(text("SELECT * FROM Liste WHERE entry_ID = :par_id"),
+                               {"par_id": id})  # type: ignore
+        return cur.fetchall()[0]
+    except Exception:
+        return None
+
+
+def get_raw_entry(id):
+    try:
+        with get_db_engine().connect() as conn:
+            cur = conn.execute(text("SELECT * FROM entries WHERE ID = :par_id"),
+                               {"par_id": id})  # type: ignore
+        return cur.fetchall()[0]
+    except Exception:
+        return None
+
+
 def delete_entry(id):
     with get_db_engine().connect() as conn:
         conn.execute(text("DELETE FROM entries WHERE id= :par_id"), {
@@ -260,3 +280,18 @@ def check_config_table() -> bool:
                 return False
         else:
             return False
+
+
+def init_event_id() -> bool:
+    if not get_config("EventID"):
+        set_config("EventID", str(uuid.uuid4()))
+    return True
+
+
+def reset_event_id() -> bool:
+    set_config("EventID", str(uuid.uuid4()))
+    return True
+
+
+def get_event_id() -> str:
+    return get_config("EventID")