Added settings saving to RCON GUI.

files/rcongui

@@ -1,5 +1,5 @@
 #! /usr/bin/env python3
-"""An RCON client."""
+"""A minimalistic, GTK-based RCON GUI."""
 
 from rcon.gui import main
 

rcon/gui.py

@@ -1,12 +1,18 @@
 """GTK based GUI."""
 
+from json import dump, load
+from logging import basicConfig, getLogger
+from os import getenv, name
+from pathlib import Path
 from socket import timeout
+from typing import NamedTuple
 
 from gi import require_version
 require_version('Gtk', '3.0')
 # pylint: disable=C0413
 from gi.repository import Gtk
 
+from rcon.config import LOG_FORMAT, LOGGER
 from rcon.exceptions import RequestIdMismatch, WrongPassword
 from rcon.proto import Client
 
@@ -14,7 +20,28 @@ from rcon.proto import Client
 __all__ = ['main']
 
 
-class GUI(Gtk.Window):
+if name == 'posix':
+    CACHE_DIR = Path.home().joinpath('.cache')
+elif name == 'nt':
+    CACHE_DIR = Path(getenv('TEMP') or getenv('TMP'))
+else:
+    raise NotImplementedError('Unsupported operating system.')
+
+
+CACHE_FILE = CACHE_DIR.joinpath('rcongui.json')
+LOGGER = getLogger('rcongui')
+
+
+class RCONParams(NamedTuple):
+    """Represents the RCON parameters."""
+
+    host: str
+    port: int
+    passwd: str
+    command: str
+
+
+class GUI(Gtk.Window):  # pylint: disable=R0902
     """A GTK based GUI for RCON."""
 
     def __init__(self):
@@ -36,6 +63,7 @@ class GUI(Gtk.Window):
 
         self.passwd = Gtk.Entry()
         self.passwd.set_placeholder_text('Password')
+        self.passwd.set_visibility(False)
         self.grid.attach(self.passwd, 2, 0, 1, 1)
 
         self.command = Gtk.Entry()
@@ -48,7 +76,58 @@ class GUI(Gtk.Window):
 
         self.result = Gtk.Entry()
         self.result.set_placeholder_text('Result')
-        self.grid.attach(self.result, 0, 2, 3, 1)
+        self.grid.attach(self.result, 0, 2, 2, 1)
+
+        self.savepw = Gtk.CheckButton(label='Save password')
+        self.grid.attach(self.savepw, 2, 2, 1, 1)
+
+        self.load_gui_settings()
+
+    @property
+    def gui_settings(self) -> dict:
+        """Returns the GUI settings as a dict."""
+        json = {
+            'host': self.host.get_text(),
+            'port': self.port.get_text(),
+            'command': self.command.get_text(),
+            'result': self.result.get_text(),
+            'savepw': (savepw := self.savepw.get_active())
+        }
+
+        if savepw:
+            json['passwd'] = self.passwd.get_text()
+
+        return json
+
+    @gui_settings.setter
+    def gui_settings(self, json: dict):
+        """Sets the GUI settings."""
+        self.host.set_text(json.get('host', ''))
+        self.port.set_text(json.get('port', ''))
+        self.passwd.set_text(json.get('passwd', ''))
+        self.command.set_text(json.get('command', ''))
+        self.result.set_text(json.get('result', ''))
+        self.savepw.set_active(json.get('savepw', False))
+
+    def load_gui_settings(self) -> dict:
+        """Loads the GUI settings from the cache file."""
+        try:
+            with CACHE_FILE.open('r') as cache:
+                self.gui_settings = load(cache)
+        except FileNotFoundError:
+            LOGGER.warning('Cache file not found: %s', CACHE_FILE)
+        except PermissionError:
+            LOGGER.error('Insufficient permissions to read: %s', CACHE_FILE)
+        except ValueError:
+            LOGGER.error('Cache file contains garbage: %s', CACHE_FILE)
+
+    def save_gui_settings(self):
+        """Saves the GUI settings to the cache file."""
+        try:
+            with CACHE_FILE.open('w') as cache:
+                dump(self.gui_settings, cache)
+        except PermissionError:
+            LOGGER.error('Insufficient permissions to read: %s', CACHE_FILE)
 
     def show_error(self, message: str):
         """Shows an error message."""
@@ -60,31 +139,40 @@ class GUI(Gtk.Window):
         message_dialog.run()
         message_dialog.destroy()
 
-    def on_button_clicked(self, _):
-        """Runs the client."""
+    def get_rcon_params(self) -> RCONParams:
+        """Returns all settings as a dict."""
         if not (host := self.host.get_text()):  # pylint: disable=C0325
-            self.show_error('No host specified.')
-            return
+            raise ValueError('No host specified.')
 
         if not (port := self.port.get_text()):  # pylint: disable=C0325
-            self.show_error('No port specified.')
-            return
+            raise ValueError('No port specified.')
+
+        if not (command := self.command.get_text()):    # pylint: disable=C0325
+            raise ValueError('No command entered.')
 
         try:
             port = int(port)
         except ValueError:
-            self.show_error(f'Invalid port: {port}')
-            return
+            raise ValueError('Invalid port specified.') from None
 
-        passwd = self.passwd.get_text()
+        if not 0 <= port <= 65535:
+            raise ValueError('Invalid port specified.')
 
-        if not (command := self.command.get_text()):    # pylint: disable=C0325
-            self.show_error('No command entered.')
-            return
+        return RCONParams(host, port, self.passwd.get_text(), command)
+
+    def run_rcon(self) -> str:
+        """Returns the current RCON settings."""
+        params = self.get_rcon_params()
 
+        with Client(params.host, params.port, passwd=params.passwd) as client:
+            return client.run(params.command)
+
+    def on_button_clicked(self, _):
+        """Runs the client."""
         try:
-            with Client(host, port, passwd=passwd) as client:
-                result = client.run(command)
+            result = self.run_rcon()
+        except ValueError as error:
+            self.show_error(' '.join(error.args))
         except ConnectionRefusedError:
             self.show_error('Connection refused.')
         except timeout:
@@ -96,15 +184,17 @@ class GUI(Gtk.Window):
         else:
             self.result.set_text(result)
 
+    def terminate(self, *args, **kwargs):
+        """Saves the settings and terminates the application."""
+        self.save_gui_settings()
+        Gtk.main_quit(*args, **kwargs)
+
 
 def main():
     """Starts the GUI."""
 
+    basicConfig(format=LOG_FORMAT)
     win = GUI()
-    win.connect('destroy', Gtk.main_quit)
+    win.connect('destroy', win.terminate)
     win.show_all()
     Gtk.main()
-
-
-if __name__ == '__main__':
-    main()