init

backend/events/models.py

@@ -0,0 +1,269 @@
+from django.db import models
+from django.db import models
+from django.conf import settings
+from django.utils import timezone
+from django.utils.text import slugify
+
+import hashlib
+import uuid
+
+import markdown
+from location_field.models.plain import PlainLocationField as LocationField
+
+from utils.models import BaseModel
+
+
+class Event(BaseModel):
+    class TypeChoices(models.TextChoices):
+        ONLINE = 'online', 'آنلاین'
+        ON_SITE = 'on_site', 'حضوری'
+        HYBRID = 'hybrid', 'آنلاین/حضوری'
+
+    class StatusChoices(models.TextChoices):
+        DRAFT = 'draft', 'Draft'
+        PUBLISHED = 'published', 'Published'
+        CANCELLED = 'cancelled', 'Cancelled'
+        COMPLETED = 'completed', 'Completed'
+
+    title = models.CharField(max_length=255)
+    slug = models.SlugField(max_length=255, unique=True, blank=True)
+    description = models.TextField(help_text="Event description in Markdown format")
+
+    start_time = models.DateTimeField()
+    end_time = models.DateTimeField()
+
+    address = models.CharField(max_length=255, blank=True, null=True, help_text="Physical address or venue name")
+    location = LocationField(based_fields=['address'], zoom=15, blank=True, null=True,
+                             help_text="Select location on map")
+
+    event_type = models.CharField(max_length=10, choices=TypeChoices.choices, default=TypeChoices.ON_SITE)
+    online_link = models.URLField(max_length=500, blank=True, null=True,
+                                  help_text="Link for online events (e.g., Zoom, Google Meet)")
+
+    status = models.CharField(max_length=10, choices=StatusChoices.choices, default=StatusChoices.DRAFT)
+    capacity = models.PositiveIntegerField(null=True, blank=True,
+                                           help_text="Maximum number of attendees (leave blank for unlimited)")
+
+    price = models.IntegerField(default=0, help_text="Price of the event. Leave blank for free events.")
+
+    registration_start_date = models.DateTimeField(null=True, blank=True)
+    registration_end_date = models.DateTimeField(null=True, blank=True)
+    featured_image = models.ImageField(upload_to='events/featured/', null=True, blank=True)
+    gallery_images = models.ManyToManyField('gallery.Gallery', blank=True, related_name='event_galleries',
+                                            help_text="Images taken during or related to the event.")
+
+    registration_success_markdown = models.TextField(
+        blank=True, null=True,
+        help_text="Optional markdown shown to users after a successful registration."
+    )
+
+    class Meta:
+        ordering = ['-start_time']
+        indexes = [
+            models.Index(fields=['status', 'start_time']),
+            models.Index(fields=['event_type']),
+        ]
+
+    def __str__(self):
+        return self.title
+
+    def save(self, *args, **kwargs):
+        if not self.slug:
+            self.slug = slugify(self.title)
+        super().save(*args, **kwargs)
+
+    @property
+    def description_html(self):
+        """Convert markdown description to HTML"""
+        return markdown.markdown(
+            self.description,
+            extensions=[
+                'markdown.extensions.extra',
+                'markdown.extensions.toc',
+            ]
+        )
+
+    @property
+    def is_registration_open(self):
+        now = timezone.now()
+        return (self.registration_start_date is None or now >= self.registration_start_date) and \
+            (self.registration_end_date is None or now <= self.registration_end_date)
+
+    @property
+    def current_attendees_count(self):
+        """Count confirmed attendees"""
+        return self.registrations.filter(status__in=[Registration.StatusChoices.CONFIRMED, Registration.StatusChoices.ATTENDED], is_deleted=False).count()
+
+    @property
+    def has_available_slots(self):
+        """Check whether registration slots are available, treating None as unlimited capacity."""
+        if self.capacity is None:
+            return True
+        return self.current_attendees_count < self.capacity
+
+
+class Registration(BaseModel):
+    class StatusChoices(models.TextChoices):
+        PENDING = 'pending', 'Pending'
+        CONFIRMED = 'confirmed', 'Confirmed'
+        CANCELLED = 'cancelled', 'Cancelled'
+        ATTENDED = 'attended', 'Attended'
+
+    event = models.ForeignKey(Event, on_delete=models.CASCADE, related_name='registrations')
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='event_registrations')
+    registered_at = models.DateTimeField(auto_now_add=True)
+    status = models.CharField(max_length=10, choices=StatusChoices.choices,
+                              default=StatusChoices.PENDING)
+    ticket_id = models.UUIDField(default=uuid.uuid4, unique=True, editable=False)
+
+    confirmation_email_sent_at = models.DateTimeField(null=True, blank=True)
+    cancellation_email_sent_at = models.DateTimeField(null=True, blank=True)
+    discount_code = models.ForeignKey(
+        "payments.DiscountCode",
+        null=True,
+        blank=True,
+        on_delete=models.SET_NULL,
+        related_name="registrations",
+    )
+    discount_amount = models.PositiveIntegerField(default=0)
+    final_price = models.PositiveIntegerField(null=True, blank=True)
+
+    class Meta:
+        ordering = ['-registered_at']
+        indexes = [
+            models.Index(fields=['event', 'status']),
+            models.Index(fields=['user']),
+        ]
+
+    def __str__(self):
+        return f"{self.user.username} registered for {self.event.title}"
+
+    @property
+    def status_label(self):
+        """Human-readable label for the current registration status."""
+        return self.get_status_display()
+
+    def save(self, *args, **kwargs):
+            # detect create vs update
+            is_create = self._state.adding
+            old_status = None
+
+            if not is_create and self.pk:
+                old_status = (
+                    self.__class__.objects.only("status").get(pk=self.pk).status
+                )
+
+            # save first (so we have a pk + final values)
+            super().save(*args, **kwargs)
+
+            # 1) on create -> send confirmation if pending/confirmed (and not sent before)
+            if is_create and self.status == self.StatusChoices.CONFIRMED and not self.confirmation_email_sent_at:
+                # lazy import to avoid circular import
+                from events.tasks import send_registration_confirmation_email
+                send_registration_confirmation_email.delay(str(self.pk))
+                self.confirmation_email_sent_at = timezone.now()
+                super().save(update_fields=["confirmation_email_sent_at"])
+
+            # 2) status changed -> cancelled
+            if (not is_create) and (old_status != self.StatusChoices.CANCELLED) and (self.status == self.StatusChoices.CANCELLED) and (not self.cancellation_email_sent_at):
+                from events.tasks import send_registration_cancellation_email
+                send_registration_cancellation_email.delay(str(self.pk))
+                self.cancellation_email_sent_at = timezone.now()
+                super().save(update_fields=["cancellation_email_sent_at"])
+
+            # 3) status changed -> confirmed (if not sent before)
+            if (not is_create) and (old_status != self.StatusChoices.CONFIRMED) and (self.status == self.StatusChoices.CONFIRMED) and (not self.confirmation_email_sent_at):
+                from events.tasks import send_registration_confirmation_email
+                send_registration_confirmation_email.delay(str(self.pk))
+                self.confirmation_email_sent_at = timezone.now()
+                super().save(update_fields=["confirmation_email_sent_at"])
+
+
+class EventEmailLog(BaseModel):
+    class KindChoices(models.TextChoices):
+        INVITE_NON_REGISTERED = "invite_non_registered", "Invite non-registered users"
+        SKYROOM_CREDENTIALS = "send_skyroom_credentials", "Skyroom credentials"
+        EVENT_ANNOUNCEMENT = "send_event_announcement", "Event announcement"
+        EVENT_ANNOUNCEMENT2 = "send_event_announcement2", "Event announcement 2"
+        EVENT_ANNOUNCEMENT3 = "send_event_announcement3", "Event announcement 3"
+        EVENT_REMINDER = "send_event_reminder", "Event reminder"
+
+    class StatusChoices(models.TextChoices):
+        PENDING = "pending", "Pending"
+        SENT = "sent", "Sent"
+        FAILED = "failed", "Failed"
+
+    KIND_INVITE_NON_REGISTERED = KindChoices.INVITE_NON_REGISTERED
+    KIND_SKYROOM_CREDENTIALS = KindChoices.SKYROOM_CREDENTIALS
+    KIND_EVENT_ANNOUNCEMENT = KindChoices.EVENT_ANNOUNCEMENT
+    KIND_EVENT_ANNOUNCEMENT2 = KindChoices.EVENT_ANNOUNCEMENT2
+    KIND_EVENT_ANNOUNCEMENT3 = KindChoices.EVENT_ANNOUNCEMENT3
+    KIND_EVENT_REMINDER = KindChoices.EVENT_REMINDER
+    KIND_CHOICES = KindChoices.choices
+
+    STATUS_PENDING = StatusChoices.PENDING
+    STATUS_SENT = StatusChoices.SENT
+    STATUS_FAILED = StatusChoices.FAILED
+    STATUS_CHOICES = StatusChoices.choices
+
+    event = models.ForeignKey('events.Event', on_delete=models.CASCADE, related_name='email_logs')
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name='email_logs')
+    kind = models.CharField(max_length=64, choices=KIND_CHOICES)
+    status = models.CharField(max_length=16, choices=STATUS_CHOICES, default=STATUS_PENDING)
+    error = models.TextField(blank=True, null=True)
+    sent_at = models.DateTimeField(blank=True, null=True)
+    context_hash = models.CharField(max_length=64, blank=True, null=True)
+
+    class Meta:
+        unique_together = ("event", "user", "kind", "context_hash")
+        indexes = [
+            models.Index(fields=["event", "kind", "status"]),
+            models.Index(fields=["user", "kind", "status"]),
+        ]
+
+    def __str__(self):
+        return f"{self.event.id} - {self.user.id} - {self.kind} - {self.status}"
+
+    @staticmethod
+    def _hash_context(context):
+        if context is None:
+            return None
+        if not isinstance(context, str):
+            context = str(context)
+        return hashlib.sha256(context.encode("utf-8")).hexdigest()
+
+    @classmethod
+    def claim(cls, *, event_id, user_id, kind, context=None):
+        context_hash = cls._hash_context(context)
+        log, created = cls.objects.get_or_create(
+            event_id=event_id,
+            user_id=user_id,
+            kind=kind,
+            context_hash=context_hash,
+            defaults={"status": cls.STATUS_PENDING},
+        )
+        if not created and log.status in (cls.STATUS_PENDING, cls.STATUS_SENT):
+            return log, True
+        if not created:
+            log._commit_status(cls.STATUS_PENDING, error="")
+        return log, False
+
+    def _commit_status(self, status, *, error="", sent_at=None):
+        self.status = status
+        self.error = error
+        update_fields = ["status", "error"]
+        if status == self.STATUS_SENT:
+            self.sent_at = sent_at or timezone.now()
+            update_fields.append("sent_at")
+        elif self.sent_at is not None:
+            self.sent_at = None
+            update_fields.append("sent_at")
+        if hasattr(self, "updated_at"):
+            update_fields.append("updated_at")
+        self.save(update_fields=update_fields)
+
+    def mark_sent(self):
+        self._commit_status(self.STATUS_SENT)
+
+    def mark_failed(self, error):
+        self._commit_status(self.STATUS_FAILED, error=error)