fix issue with database path falling back to faulty path

update logic in welcome wizard, add checks for qapplication instance

src/backend/database.py

@@ -12,7 +12,7 @@ from typing import Any, List, Optional, Tuple, Union
 
 import loguru
 
-from src import LOG_DIR, settings
+from src import LOG_DIR, settings, DATABASE_DIR
 from src.backend.db import (
     CREATE_ELSA_FILES_TABLE,
     CREATE_ELSA_MEDIA_TABLE,
@@ -44,12 +44,11 @@ ascii_lowercase = lower + digits + punctuation
 
 # get the line that called the function
 class Database:
-    database = settings.database
     """
     Initialize the database and create the tables if they do not exist.
     """
 
-    def __init__(self, db_path: Path = None):
+    def __init__(self, db_path: Union[Path, None] = None):
         """
         Default constructor for the database class
 
@@ -57,15 +56,32 @@ class Database:
             db_path (str, optional): Optional Path for testing / specific purposes. Defaults to None.
         """
         if db_path is None:
-            self.db_path = Path(self.database.path.expanduser(), self.database.name)
+            if settings.database.path is not None:
+                self.db_path = Path(
+                    settings.database.path.expanduser(), settings.database.name
+                )
+            else:
+                self.db_path = None
+
             # self.db_path = self.db_path.replace("~", str(Path.home()))
-            log.debug(self.db_path)
         else:
             self.db_path = db_path
-        self.checkDatabaseStatus()
+        log.debug(f"Database path: {self.db_path}")
+        self.db_initialized = False
+
+    def initializeDatabase(self):
+        if not self.db_initialized:
+            self.checkDatabaseStatus()
+            self.db_initialized = True
+
+    def overwritePath(self, new_db_path: str):
+        log.debug("got new path, overwriting")
+        self.db_path = Path(new_db_path)
 
     def checkDatabaseStatus(self):
-        path = self.database.path.expanduser()
+        path = settings.database.path
+        if path is None:
+            path = Path(DATABASE_DIR)
         # path = path.replace("~", str(Path.home()))
         # path = os.path.abspath(path)
         if not os.path.exists(path):
@@ -509,7 +525,7 @@ class Database:
             str: The filename of the recreated file
         """
         blob = self.getBlob(filename, app_id)
-        tempdir = self.database.temp.expanduser()
+        tempdir = settings.database.temp.expanduser()
         if not tempdir.exists():
             tempdir.mkdir(parents=True, exist_ok=True)
         file = tempfile.NamedTemporaryFile(
@@ -1280,6 +1296,13 @@ class Database:
             "INSERT OR IGNORE INTO user (username, password, role, salt) VALUES (?,?,?,?)",
             (user, password, role, salt),
         )
+        # check if user was created
+        return (
+            self.query_db(
+                "SELECT username FROM user WHERE username=?", (user,), one=True
+            )
+            is not None
+        )
 
     def deleteUser(self, user):
         """delete an unser
@@ -1467,7 +1490,7 @@ class Database:
             "SELECT fileblob FROM elsa_files WHERE filename=?", (filename,), one=True
         )[0]
         # log.debug(blob)
-        tempdir = self.database.temp.expanduser()
+        tempdir = settings.database.temp.expanduser()
         if not tempdir.exists():
             tempdir.mkdir(parents=True, exist_ok=True)