UUID, email fields and receiver for sending them, /edit API for modifying signup with ID and UUID

webapp/models.py

@@ -1,21 +1,23 @@
 """Webapp app models."""
 
+from django.conf import settings
 from django.db import models
 from django.utils import timezone
 # from datetime import timedelta
 from django.contrib.auth.models import User
 from django.db.models.signals import post_save
 from django.dispatch import receiver
-from webapp.utils import month_from_now
+from webapp.utils import month_from_now, send_signup_email
 from django.utils.translation import ugettext_lazy as _
 from auditlog.registry import auditlog
 from phonenumber_field.modelfields import PhoneNumberField
 from django.contrib.postgres.fields import JSONField
-
-# import logging
-
+from uuid import uuid4
+import logging
+from smtplib import SMTPAuthenticationError
 
 VERBOSE_NAME = _('Webapp')
+EMAIL_REGEX = r"(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)"
 
 
 class Tag(models.Model):
@@ -64,7 +66,7 @@ class Event(BaseFeed):
     start_time = models.DateTimeField(default=timezone.now)
     end_time = models.DateTimeField(default=timezone.now)
     signupForm = models.ManyToManyField(
-        'SignupForm', blank=True)
+        'SignupForm', blank=True, related_name="event")
     location = models.CharField(max_length=255, blank=True)
 
     def __str__(self):
@@ -116,6 +118,13 @@ class SignupForm(models.Model):
                 properties[id] = {
                     "type": "string"
                 }
+            elif question_type == "email":
+                # Format is just a "FYI" field, so we also have pattern.
+                properties[id] = {
+                    "type": "string",
+                    "format": "email",
+                    "pattern": EMAIL_REGEX
+                }
             elif question_type == "radiobutton":
                 options = q["options"]
                 regexes = map(lambda x: f"^{x}$", options)
@@ -163,6 +172,10 @@ class Signup(models.Model):
     answer = JSONField()
     # Answer we use in signupForm signups field. Frontend uses first questions answer as this value.
     list_name = models.CharField(_('Name'), max_length=255)
+    # If there is email in questions, we save it as own field
+    email = models.EmailField(blank=True, null=True)
+    # Random unique identifier. Used for signup editing by the user.
+    uuid = models.UUIDField(default=uuid4, editable=False)
 
     def __str__(self):
         return f"{self.signupForm}: {self.list_name} ({self.pk})"
@@ -172,6 +185,21 @@ class Signup(models.Model):
         verbose_name_plural = _('Sign-ups')
 
 
+@receiver(post_save, sender=Signup)
+def email_on_singup(sender, instance, created, **kwargs):
+    """Send email validation."""
+    if not settings.ENABLE_AUTOMATIC_EMAILS:
+        return
+
+    try:
+        if created and instance.email:
+            # TODO: Possible bug due to many-to-many relationship with events and forms.
+            subject = _(f"Olet ilmoittautunut tapahtumaan {instance.signupForm.event.first().title}")
+            send_signup_email(instance.email, subject, instance.id, instance.uuid)
+    except SMTPAuthenticationError:
+        logging.error('Failed to send email to signup')
+
+
 class BaseRole(models.Model):
     """Base model for occupations/roles."""