Add secure password storing (#4)

* Added xdg-compliant path for Linux and macOS

Created config.py

Moved system path logic to config.py

* Added secure password storing with keyring

* fixed not showing login screen if no password is saved

* Update readme with new config info

* add pywin32 lib

README.md

@@ -30,17 +30,12 @@ zutui
 `ctrl`+`q` - Quit
 
 # Sidenotes
-- config is stored @ `~/zutui/config.json`
+## Config
+- On Unix like is stored @ `~/.config/zutui/config.json`
+- On Windows is stored @ `~/zutui/config.json`
 - so are `grades_cache.json`
-- in plaintext.....
 
-##### As of right now I don't see any MUCH better way.
+##### Feel free to pull request if you're smarter :)
-
-##### I mean we could simply encrypt and decrypt it during runtime, but... does it really make it any more secure?
-
-##### And we can't really store it in any form of a _hash_ as we have to log in everytime with plain text anyways...
-
-##### However feel free to pull request if you're smarter :)
 
 # TODO:
 - [x] **Nothing**

setup.py

@@ -8,10 +8,12 @@ setup(
         "requests",
         "beautifulsoup4",
         "textual",
+        "keyring",
+        "pywin32"
     ],
     entry_points={
         'console_scripts': [
             'zutui=zut_app.zutui:main',
         ],
     },
-)
+)

zut_app/zutui.py

@@ -1,5 +1,7 @@
 import json
 import os
+import keyring
+from keyring.errors import KeyringError
 from datetime import datetime
 from textual.app import App, ComposeResult
 from textual.containers import Container
@@ -54,9 +56,20 @@ class LoginScreen(Screen):
             if success:
                 try:
                     with open(CONFIG_FILE, "w") as f:
-                        json.dump({"username": user, "password": password}, f)
+                        json.dump({"username": user}, f)
+                        keyring.set_password("zutui", user, password)
+                except KeyringError as e:
+                    error = e
+                    self.app.call_from_thread(
+                            lambda:
+                                self.app.notify(
+                                    f"Błąd: {str(error)}",
+                                    title="Błąd zapisu hasła do systemowego menedżera haseł",
+                                    severity="warning",
+                                    timeout=5
+                                    )
+                            )
                 except: pass
-                
                 def do_switch():
                     self.app.switch_screen(DashboardScreen())
                 self.app.call_from_thread(do_switch)
@@ -406,7 +419,10 @@ class ZutApp(App):
             try:
                 with open(CONFIG_FILE, "r") as f:
                     creds = json.load(f)
-                    self.zut_client = ZUT(creds["username"], creds["password"])
+                    password = keyring.get_password("zutui", creds["username"])
+                    if password is None:
+                        raise ValueError("Hasło nie zostało znalezione")
+                    self.zut_client = ZUT(creds["username"], password)
                     self.push_screen(DashboardScreen())
             except:
                 self.push_screen(LoginScreen())