Offer to store new settings in config file

src/client.py

@@ -8,6 +8,8 @@ import ssl
 import string
 import sys
 
+import utilities
+
 
 class Client:
     def __init__(self, host='localhost', port=3001,
@@ -425,14 +427,17 @@ def main():
             token = None
 
     # If import fails, prompt user for host or port
+    new_settings = {}  # After getting these settings, offer to store them
     while host is None:
         host = input("Enter host:\t\t\t\t\t\t")
+        new_settings['host'] = host
     while port is None:
         try:
             port = int(input("Enter port:\t\t\t\t\t\t"))
         except ValueError:
             logging.info("Invalid port. Enter a valid port number!")
             port = None
+        new_settings['port'] = port
     while action is None:
         action = get_action(
             input("Do you want to (R)eceive or (S)end a file?\t\t")
@@ -459,6 +464,7 @@ def main():
             )
             if file_path and not os.path.isdir(os.path.abspath(file_path)):
                 file_path = None
+        new_settings['file_path'] = file_path
     if password is None:
         logging.warning(
             "You have provided no password for file encryption.\n"
@@ -482,6 +488,28 @@ def main():
         )
     while token is None or not (6 <= len(token) <= 10):
         token = input("Please enter a 6-10 chars token.\t\t\t\t")
+    if new_settings:
+        answer = utilities.timed_input(
+            "Do you want to store the following configuration values in "
+            "`config.py`?\n\n" + '\n'.join(
+                '\t\t'.join(map(str, item))
+                for item in new_settings.items()
+            ),
+            timeout=3
+        )
+        if answer:
+            with open('config.py', 'a') as configuration_file:
+                configuration_file.writelines(
+                    [
+                        f'{name} = "{value}"'
+                        if type(value) is str
+                        else f'{name} = {value}'
+                        for name, value in new_settings.items()
+                    ]
+                )
+            logging.info("Configuration values stored.")
+        else:
+            logging.info("Proceeding without storing values...")
     loop = asyncio.get_event_loop()
     client = Client(
         host=host,

src/utilities.py

@@ -0,0 +1,36 @@
+"""Useful functions."""
+import logging
+import signal
+
+
+def timed_input(message: str = None,
+                timeout: int = 5):
+
+    class TimeoutExpired(Exception):
+        pass
+
+    def interrupted(signal_number, stack_frame):
+        """Called when read times out."""
+        raise TimeoutExpired
+
+    if message is None:
+        message = f"Enter something within {timeout} seconds"
+
+    signal.alarm(timeout)
+    signal.signal(signal.SIGALRM, interrupted)
+    try:
+        given_input = input(message)
+    except TimeoutExpired:
+        given_input = None
+        print()  # Print end of line
+        logging.info("Timeout!")
+    signal.alarm(0)
+    if given_input:
+        logging.info(f"You typed: {given_input}")
+    return
+
+
+if __name__ == '__main__':
+    root_logger = logging.getLogger()
+    root_logger.setLevel(logging.INFO)
+    timed_input("Inserisci qualcosa (entro 3 secondi)\t\t", timeout=3)