Partially completed the user daemon

ressenger.py

@@ -172,6 +172,9 @@ List of options:
     if profile.startswith("cache_"):
         message_box_1('Error', 'Invalid profile name.')
         exit()
+    if profile.startswith("lock_"):
+        message_box_1('Error', 'Invalid profile name.')
+        exit()
 
     user_path=pathlib.Path(f'~/.ressenger/{profile}').expanduser()
     if not user_path.exists():

ressenger_user.py

@@ -1,3 +1,34 @@
 #!/usr/bin/python3
-import ressenger_common
+import sys, pathlib, subprocess, os
+import ressenger_common, ressenger_exceptions, ressenger_cryptography
 
+def run_in_background(pyfile, args=None, stdout=None, stderr=None):
+    args = args or []
+    cmd = [sys.executable, pyfile] + args
+
+    p = subprocess.Popen(
+        cmd,
+        stdout=stdout or subprocess.DEVNULL,
+        stderr=stderr or subprocess.DEVNULL,
+        start_new_session=True,
+        close_fds=True
+    )
+    return p
+
+def initialise_user(username, password):
+    user_path=pathlib.Path(f'~/.ressenger/{username}').expanduser()
+    if not user_path.exists():
+        raise ressenger_exceptions.UserDoesNotExistError(f'The user {username} does not exist.')
+    with open(user_path, 'rb') as file:
+        user=pickle.loads(ressenger_cryptography.decrypt_bytes(file.read(), password))
+    run_in_background('ressenger_server.py', args=[user['port']])
+    cache1_path = pathlib.Path(f"~/.ressenger/cache_{user['port']}").expanduser()
+    cache2_path = pathlib.Path(f"~/.ressenger/cache_{username}").expanduser()
+    cache1_lock_path = pathlib.Path(f"~/.ressenger/lock_cache_{user['port']}").expanduser()
+    cache2_lock_path = pathlib.Path(f"~/.ressenger/lock_cache_{username}").expanduser()
+    cache1_processed=[]
+    cache2_processed=[]
+    # TO DO
+
+if __name__=='__main__':
+    initialise_user(sys.argv[1], sys.argv[2])