Add web/core/models_ann.py

web/core/models_ann.py

@@ -0,0 +1,46 @@
+from django.conf import settings
+from django.db import models
+from django.utils import timezone
+
+User = settings.AUTH_USER_MODEL
+
+class Announcement(models.Model):
+    title = models.CharField(max_length=200, blank=True)
+    message = models.TextField()
+    is_active = models.BooleanField(default=True)
+    start_at = models.DateTimeField(default=timezone.now)
+    end_at = models.DateTimeField(null=True, blank=True)
+    created_by = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, related_name='announcements_created')
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        ordering = ['-created_at']
+
+    def __str__(self):
+        return self.title or f"Announcement #{self.pk}"
+
+    def is_current(self):
+        now = timezone.now()
+        if not self.is_active:
+            return False
+        if self.start_at and now < self.start_at:
+            return False
+        if self.end_at and now > self.end_at:
+            return False
+        return True
+
+
+class AnnouncementDismissal(models.Model):
+    announcement = models.ForeignKey(Announcement, on_delete=models.CASCADE)
+    user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
+    dismissed_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        unique_together = ('announcement', 'user')
+        indexes = [
+            models.Index(fields=['user']),
+            models.Index(fields=['announcement']),
+        ]
+
+    def __str__(self):
+        return f"Dismissal(u={self.user_id}, a={self.announcement_id})"