feat: notifications (#1363)

* feat: added new issue subscriber table

* dev: notification model

* feat: added CRUD operation for issue subscriber

* Revert "feat: added CRUD operation for issue subscriber"

This reverts commit b22e0625768f0b096b5898936ace76d6882b0736.

* feat: added CRUD operation for issue subscriber

* dev: notification models and operations

* dev: remove delete endpoint response data

* dev: notification endpoints and fix bg worker for saving notifications

* feat: added list and unsubscribe function in issue subscriber

* dev: filter by snoozed and response update for list and permissions

* dev: update issue notifications

* dev: notification  segregation

* dev: update notifications

* dev: notification filtering

* dev: add issue name in notifications

* dev: notification new endpoints

---------

Co-authored-by: NarayanBavisetti <narayan3119@gmail.com>

apiserver/plane/db/models/__init__.py

@@ -33,6 +33,7 @@ from .issue import (
     IssueLink,
     IssueSequence,
     IssueAttachment,
+    IssueSubscriber,
 )
 
 from .asset import FileAsset
@@ -66,4 +67,7 @@ from .page import Page, PageBlock, PageFavorite, PageLabel
 from .estimate import Estimate, EstimatePoint
 
 from .inbox import Inbox, InboxIssue
+
 from .analytic import AnalyticView
+
+from .notification import Notification

apiserver/plane/db/models/issue.py

@@ -401,6 +401,27 @@ class IssueSequence(ProjectBaseModel):
         ordering = ("-created_at",)
 
 
+class IssueSubscriber(ProjectBaseModel):
+    issue = models.ForeignKey(
+        Issue, on_delete=models.CASCADE, related_name="issue_subscribers"
+    )
+    subscriber = models.ForeignKey(
+        settings.AUTH_USER_MODEL,
+        on_delete=models.CASCADE,
+        related_name="issue_subscribers",
+    )
+
+    class Meta:
+        unique_together = ["issue", "subscriber"]
+        verbose_name = "Issue Subscriber"
+        verbose_name_plural = "Issue Subscribers"
+        db_table = "issue_subscribers"
+        ordering = ("-created_at",)
+
+    def __str__(self):
+        return f"{self.issue.name} {self.subscriber.email}"
+
+
 # TODO: Find a better method to save the model
 @receiver(post_save, sender=Issue)
 def create_issue_sequence(sender, instance, created, **kwargs):

apiserver/plane/db/models/notification.py

@@ -0,0 +1,37 @@
+# Django imports
+from django.db import models
+
+# Third party imports
+from .base import BaseModel
+
+
+class Notification(BaseModel):
+    workspace = models.ForeignKey(
+        "db.Workspace", related_name="notifications", on_delete=models.CASCADE
+    )
+    project = models.ForeignKey(
+        "db.Project", related_name="notifications", on_delete=models.CASCADE, null=True
+    )
+    data = models.JSONField(null=True)
+    entity_identifier = models.UUIDField(null=True)
+    entity_name = models.CharField(max_length=255)
+    title = models.TextField()
+    message = models.JSONField(null=True)
+    message_html = models.TextField(blank=True, default="<p></p>")
+    message_stripped = models.TextField(blank=True, null=True)
+    sender = models.CharField(max_length=255)
+    triggered_by = models.ForeignKey("db.User", related_name="triggered_notifications", on_delete=models.SET_NULL, null=True)
+    receiver = models.ForeignKey("db.User", related_name="received_notifications", on_delete=models.CASCADE)
+    read_at = models.DateTimeField(null=True)
+    snoozed_till = models.DateTimeField(null=True)
+    archived_at = models.DateTimeField(null=True)
+
+    class Meta:
+        verbose_name = "Notification"
+        verbose_name_plural = "Notifications"
+        db_table = "notifications"
+        ordering = ("-created_at",)
+
+    def __str__(self):
+        """Return name of the notifications"""
+        return f"{self.receiver.email} <{self.workspace.name}>"