add forgot password page

src/EzLanManager.py

@@ -104,7 +104,7 @@ if __name__ == "__main__":
             Page(
                 name="ForgotPassword",
                 page_url="forgot-password",
-                build=lambda: pages.PlaceholderPage(placeholder_name="Passwort vergessen"),
+                build=pages.ForgotPasswordPage,
             ),
             Page(
                 name="EditProfile",

src/ez_lan_manager/pages/ForgotPassword.py

@@ -0,0 +1,111 @@
+from hashlib import sha256
+from random import choices
+
+from email_validator import validate_email, EmailNotValidError
+from rio import Column, Component, event, Text, TextStyle, TextInput, TextInputChangeEvent, Button
+
+from src.ez_lan_manager import ConfigurationService, UserService, MailingService
+from src.ez_lan_manager.components.MainViewContentBox import MainViewContentBox
+from src.ez_lan_manager.pages import BasePage
+
+class ForgotPasswordPage(Component):
+    def on_email_changed(self, change_event: TextInputChangeEvent) -> None:
+        try:
+            validate_email(change_event.text, check_deliverability=False)
+            self.email_input.is_valid = True
+            self.submit_button.is_sensitive = True
+        except EmailNotValidError:
+            self.email_input.is_valid = False
+            self.submit_button.is_sensitive = False
+
+    async def on_submit_button_pressed(self) -> None:
+        self.submit_button.is_loading = True
+        await self.submit_button.force_refresh()
+        lan_info = self.session[ConfigurationService].get_lan_info()
+        user_service = self.session[UserService]
+        mailing_service = self.session[MailingService]
+        user = user_service.get_user(self.email_input.text.strip())
+        if user is not None:
+            new_password = "".join(choices(user_service.ALLOWED_USER_NAME_SYMBOLS, k=16))
+            user.user_password = sha256(new_password.encode(encoding="utf-8")).hexdigest()
+            user_service.update_user(user)
+            await mailing_service.send_email(
+                subject=f"Dein neues Passwort für {lan_info.name}",
+                body=f"Du hast für den EZ-LAN Manager der {lan_info.name} ein neues Passwort angefragt. "
+                     f"Und hier ist es schon:\n\n{new_password}\n\nSolltest du kein neues Passwort angefordert haben, "
+                     f"ignoriere diese E-Mail.\n\nLiebe Grüße\nDein {lan_info.name} - Team",
+                receiver=self.email_input.text.strip()
+            )
+
+        self.submit_button.is_loading = False
+        self.email_input.text = ""
+
+        self.info_text.text = "Falls für diese E-Mail ein Konto besteht, " \
+                              "bekommst du in den nächsten Minuten ein neues Passwort zugeschickt. " \
+                              "Bitte prüfe dein Spam-Postfach.",
+
+    @event.on_populate
+    async def on_populate(self) -> None:
+        await self.session.set_title(f"{self.session[ConfigurationService].get_lan_info().name} - Passwort vergessen")
+
+    def build(self) -> Component:
+        self.email_input = TextInput(
+            label="E-Mail Adresse",
+            text="",
+            margin_left=1,
+            margin_right=1,
+            margin_bottom=1,
+            grow_x=True,
+            on_change=self.on_email_changed
+        )
+        self.submit_button = Button(
+            content=Text(
+                "Neues Passwort anfordern",
+                style=TextStyle(fill=self.session.theme.background_color, font_size=0.9),
+                align_x=0.5
+            ),
+            grow_x=True,
+            margin_top=2,
+            margin_left=1,
+            margin_right=1,
+            margin_bottom=1,
+            shape="rectangle",
+            style="minor",
+            color=self.session.theme.secondary_color,
+            on_press=self.on_submit_button_pressed,
+            is_sensitive=False
+        )
+        self.info_text = Text(
+            text="",
+            style=TextStyle(
+                fill=self.session.theme.background_color,
+                font_size=1
+            ),
+            margin_top=2,
+            margin_left=1,
+            margin_right=1,
+            margin_bottom=2,
+            wrap=True
+        )
+        return BasePage(
+            content=Column(
+                MainViewContentBox(
+                    content=Column(
+                        Text(
+                            "Passwort vergessen",
+                            style=TextStyle(
+                                fill=self.session.theme.background_color,
+                                font_size=1.2
+                            ),
+                            margin_top=2,
+                            margin_bottom=2,
+                            align_x=0.5
+                        ),
+                        self.email_input,
+                        self.submit_button,
+                        self.info_text
+                    )
+                ),
+                align_y=0,
+            )
+        )

src/ez_lan_manager/pages/__init__.py

@@ -4,3 +4,4 @@ from .PlaceholderPage import PlaceholderPage
 from .Logout import LogoutPage
 from .Account import AccountPage
 from .EditProfile import EditProfilePage
+from .ForgotPassword import ForgotPasswordPage

src/ez_lan_manager/services/MailingService.py

@@ -1,7 +1,6 @@
 import logging
-from email.mime.multipart import MIMEMultipart
-from email.mime.text import MIMEText
-from smtplib import SMTP
+from email.message import EmailMessage
+import aiosmtplib
 
 from src.ez_lan_manager.types.ConfigurationTypes import MailingServiceConfiguration
 
@@ -11,20 +10,20 @@ class MailingService:
     def __init__(self, configuration: MailingServiceConfiguration):
         self._config = configuration
 
-    def send_email(self, subject: str, body: str, receiver: str) -> None:
-        # ToDo: Check with Rio/FastAPI if this needs to be ASYNC
+    async def send_email(self, subject: str, body: str, receiver: str) -> None:
         try:
-            msg = MIMEMultipart()
-            msg['From'] = self._config.sender
-            msg['To'] = receiver
-            msg['Subject'] = subject
-
-            msg.attach(MIMEText(body, 'plain'))
-
-            with SMTP(self._config.smtp_server, self._config.smtp_port) as server:
-                server.starttls()
-                server.login(self._config.username, self._config.password)
-                server.sendmail(self._config.sender, receiver, msg.as_string())
+            message = EmailMessage()
+            message["From"] = self._config.sender
+            message["To"] = receiver
+            message["Subject"] = subject
+            message.set_content(body)
 
+            await aiosmtplib.send(
+                message,
+                hostname=self._config.smtp_server,
+                port=self._config.smtp_port,
+                username=self._config.username,
+                password=self._config.password
+            )
         except Exception as e:
             logger.error(f"Failed to send email: {e}")