import random import string from asgiref.sync import sync_to_async from django.conf import settings from django.core.mail import send_mail from django.db import models from django.template.loader import render_to_string from core.models import Config from stator.models import State, StateField, StateGraph, StatorModel class PasswordResetStates(StateGraph): new = State(try_interval=300) sent = State() new.transitions_to(sent) @classmethod async def handle_new(cls, instance: "PasswordReset"): """ Sends the password reset email. """ reset = await instance.afetch_full() if reset.new_account: await sync_to_async(send_mail)( subject=f"{Config.system.site_name}: Confirm new account", message=render_to_string( "emails/account_new.txt", { "reset": reset, "config": Config.system, "settings": settings, }, ), from_email=settings.EMAIL_FROM, recipient_list=[reset.user.email], ) else: await sync_to_async(send_mail)( subject=f"{Config.system.site_name}: Reset password", message=render_to_string( "emails/password_reset.txt", { "reset": reset, "config": Config.system, "settings": settings, }, ), from_email=settings.EMAIL_FROM, recipient_list=[reset.user.email], ) return cls.sent class PasswordReset(StatorModel): """ A password reset for a user (this is also how we create accounts) """ state = StateField(PasswordResetStates) user = models.ForeignKey( "users.user", on_delete=models.CASCADE, related_name="password_resets", ) token = models.CharField(max_length=500, unique=True) new_account = models.BooleanField() created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) @classmethod def create_for_user(cls, user): return cls.objects.create( user=user, token="".join(random.choice(string.ascii_lowercase) for i in range(42)), new_account=not user.password, ) ### Async helpers ### async def afetch_full(self): """ Returns a version of the object with all relations pre-loaded """ return await PasswordReset.objects.select_related( "user", ).aget(pk=self.pk)