chore: rename server to api (#7342)

apps/api/plane/app/views/issue/activity.py

@@ -0,0 +1,83 @@
+# Python imports
+from itertools import chain
+
+# Django imports
+from django.db.models import Prefetch, Q
+from django.utils.decorators import method_decorator
+from django.views.decorators.gzip import gzip_page
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseAPIView
+from plane.app.serializers import IssueActivitySerializer, IssueCommentSerializer
+from plane.app.permissions import ProjectEntityPermission, allow_permission, ROLE
+from plane.db.models import IssueActivity, IssueComment, CommentReaction, IntakeIssue
+
+
+class IssueActivityEndpoint(BaseAPIView):
+    permission_classes = [ProjectEntityPermission]
+
+    @method_decorator(gzip_page)
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def get(self, request, slug, project_id, issue_id):
+        filters = {}
+        if request.GET.get("created_at__gt", None) is not None:
+            filters = {"created_at__gt": request.GET.get("created_at__gt")}
+
+        issue_activities = (
+            IssueActivity.objects.filter(issue_id=issue_id)
+            .filter(
+                ~Q(field__in=["comment", "vote", "reaction", "draft"]),
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+                workspace__slug=slug,
+            )
+            .filter(**filters)
+            .select_related("actor", "workspace", "issue", "project")
+        ).order_by("created_at")
+        issue_comments = (
+            IssueComment.objects.filter(issue_id=issue_id)
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+                workspace__slug=slug,
+            )
+            .filter(**filters)
+            .order_by("created_at")
+            .select_related("actor", "issue", "project", "workspace")
+            .prefetch_related(
+                Prefetch(
+                    "comment_reactions",
+                    queryset=CommentReaction.objects.select_related("actor"),
+                )
+            )
+        )
+
+        if request.GET.get("activity_type", None) == "issue-property":
+            issue_activities = issue_activities.prefetch_related(
+                Prefetch(
+                    "issue__issue_intake",
+                    queryset=IntakeIssue.objects.only(
+                        "source_email", "source", "extra"
+                    ),
+                    to_attr="source_data",
+                )
+            )
+            issue_activities = IssueActivitySerializer(issue_activities, many=True).data
+            return Response(issue_activities, status=status.HTTP_200_OK)
+
+        if request.GET.get("activity_type", None) == "issue-comment":
+            issue_comments = IssueCommentSerializer(issue_comments, many=True).data
+            return Response(issue_comments, status=status.HTTP_200_OK)
+
+        result_list = sorted(
+            chain(issue_activities, issue_comments),
+            key=lambda instance: instance["created_at"],
+        )
+
+        return Response(result_list, status=status.HTTP_200_OK)

apps/api/plane/app/views/issue/archive.py

@@ -0,0 +1,345 @@
+# Python imports
+import json
+
+# Django imports
+from django.core.serializers.json import DjangoJSONEncoder
+from django.db.models import F, Func, OuterRef, Q, Prefetch, Exists, Subquery
+from django.utils import timezone
+from django.utils.decorators import method_decorator
+from django.views.decorators.gzip import gzip_page
+
+# Third Party imports
+from rest_framework import status
+from rest_framework.response import Response
+
+from plane.app.permissions import ProjectEntityPermission
+from plane.app.serializers import (
+    IssueFlatSerializer,
+    IssueSerializer,
+    IssueDetailSerializer,
+)
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.db.models import (
+    Issue,
+    FileAsset,
+    IssueLink,
+    IssueSubscriber,
+    IssueReaction,
+    CycleIssue,
+)
+from plane.utils.grouper import (
+    issue_group_values,
+    issue_on_results,
+    issue_queryset_grouper,
+)
+from plane.utils.issue_filters import issue_filters
+from plane.utils.order_queryset import order_issue_queryset
+from plane.utils.paginator import GroupedOffsetPaginator, SubGroupedOffsetPaginator
+from plane.app.permissions import allow_permission, ROLE
+from plane.utils.error_codes import ERROR_CODES
+from plane.utils.host import base_host
+
+# Module imports
+from .. import BaseViewSet, BaseAPIView
+
+
+class IssueArchiveViewSet(BaseViewSet):
+    serializer_class = IssueFlatSerializer
+    model = Issue
+
+    def get_queryset(self):
+        return (
+            Issue.objects.annotate(
+                sub_issues_count=Issue.objects.filter(parent=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .filter(deleted_at__isnull=True)
+            .filter(archived_at__isnull=False)
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .select_related("workspace", "project", "state", "parent")
+            .prefetch_related("assignees", "labels", "issue_module__module")
+            .annotate(
+                cycle_id=Subquery(
+                    CycleIssue.objects.filter(
+                        issue=OuterRef("id"), deleted_at__isnull=True
+                    ).values("cycle_id")[:1]
+                )
+            )
+            .annotate(
+                link_count=IssueLink.objects.filter(issue=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                attachment_count=FileAsset.objects.filter(
+                    issue_id=OuterRef("id"),
+                    entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+                )
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                sub_issues_count=Issue.issue_objects.filter(parent=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+        )
+
+    @method_decorator(gzip_page)
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER])
+    def list(self, request, slug, project_id):
+        filters = issue_filters(request.query_params, "GET")
+        show_sub_issues = request.GET.get("show_sub_issues", "true")
+
+        order_by_param = request.GET.get("order_by", "-created_at")
+
+        issue_queryset = self.get_queryset().filter(**filters)
+
+        issue_queryset = (
+            issue_queryset
+            if show_sub_issues == "true"
+            else issue_queryset.filter(parent__isnull=True)
+        )
+        # Issue queryset
+        issue_queryset, order_by_param = order_issue_queryset(
+            issue_queryset=issue_queryset, order_by_param=order_by_param
+        )
+
+        # Group by
+        group_by = request.GET.get("group_by", False)
+        sub_group_by = request.GET.get("sub_group_by", False)
+
+        # issue queryset
+        issue_queryset = issue_queryset_grouper(
+            queryset=issue_queryset, group_by=group_by, sub_group_by=sub_group_by
+        )
+
+        if group_by:
+            # Check group and sub group value paginate
+            if sub_group_by:
+                if group_by == sub_group_by:
+                    return Response(
+                        {
+                            "error": "Group by and sub group by cannot have same parameters"
+                        },
+                        status=status.HTTP_400_BAD_REQUEST,
+                    )
+                else:
+                    # group and sub group pagination
+                    return self.paginate(
+                        request=request,
+                        order_by=order_by_param,
+                        queryset=issue_queryset,
+                        on_results=lambda issues: issue_on_results(
+                            group_by=group_by, issues=issues, sub_group_by=sub_group_by
+                        ),
+                        paginator_cls=SubGroupedOffsetPaginator,
+                        group_by_fields=issue_group_values(
+                            field=group_by,
+                            slug=slug,
+                            project_id=project_id,
+                            filters=filters,
+                        ),
+                        sub_group_by_fields=issue_group_values(
+                            field=sub_group_by,
+                            slug=slug,
+                            project_id=project_id,
+                            filters=filters,
+                        ),
+                        group_by_field_name=group_by,
+                        sub_group_by_field_name=sub_group_by,
+                        count_filter=Q(
+                            Q(issue_intake__status=1)
+                            | Q(issue_intake__status=-1)
+                            | Q(issue_intake__status=2)
+                            | Q(issue_intake__isnull=True),
+                            archived_at__isnull=True,
+                            is_draft=False,
+                        ),
+                    )
+            # Group Paginate
+            else:
+                # Group paginate
+                return self.paginate(
+                    request=request,
+                    order_by=order_by_param,
+                    queryset=issue_queryset,
+                    on_results=lambda issues: issue_on_results(
+                        group_by=group_by, issues=issues, sub_group_by=sub_group_by
+                    ),
+                    paginator_cls=GroupedOffsetPaginator,
+                    group_by_fields=issue_group_values(
+                        field=group_by,
+                        slug=slug,
+                        project_id=project_id,
+                        filters=filters,
+                    ),
+                    group_by_field_name=group_by,
+                    count_filter=Q(
+                        Q(issue_intake__status=1)
+                        | Q(issue_intake__status=-1)
+                        | Q(issue_intake__status=2)
+                        | Q(issue_intake__isnull=True),
+                        archived_at__isnull=True,
+                        is_draft=False,
+                    ),
+                )
+        else:
+            # List Paginate
+            return self.paginate(
+                order_by=order_by_param,
+                request=request,
+                queryset=issue_queryset,
+                on_results=lambda issues: issue_on_results(
+                    group_by=group_by, issues=issues, sub_group_by=sub_group_by
+                ),
+            )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER])
+    def retrieve(self, request, slug, project_id, pk=None):
+        issue = (
+            self.get_queryset()
+            .filter(pk=pk)
+            .prefetch_related(
+                Prefetch(
+                    "issue_reactions",
+                    queryset=IssueReaction.objects.select_related("issue", "actor"),
+                )
+            )
+            .prefetch_related(
+                Prefetch(
+                    "issue_link",
+                    queryset=IssueLink.objects.select_related("created_by"),
+                )
+            )
+            .annotate(
+                is_subscribed=Exists(
+                    IssueSubscriber.objects.filter(
+                        workspace__slug=slug,
+                        project_id=project_id,
+                        issue_id=OuterRef("pk"),
+                        subscriber=request.user,
+                    )
+                )
+            )
+        ).first()
+        if not issue:
+            return Response(
+                {"error": "The required object does not exist."},
+                status=status.HTTP_404_NOT_FOUND,
+            )
+        serializer = IssueDetailSerializer(issue, expand=self.expand)
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER])
+    def archive(self, request, slug, project_id, pk=None):
+        issue = Issue.issue_objects.get(
+            workspace__slug=slug, project_id=project_id, pk=pk
+        )
+        if issue.state.group not in ["completed", "cancelled"]:
+            return Response(
+                {"error": "Can only archive completed or cancelled state group issue"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        issue_activity.delay(
+            type="issue.activity.updated",
+            requested_data=json.dumps(
+                {"archived_at": str(timezone.now().date()), "automation": False}
+            ),
+            actor_id=str(request.user.id),
+            issue_id=str(issue.id),
+            project_id=str(project_id),
+            current_instance=json.dumps(
+                IssueSerializer(issue).data, cls=DjangoJSONEncoder
+            ),
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        issue.archived_at = timezone.now().date()
+        issue.save()
+
+        return Response(
+            {"archived_at": str(issue.archived_at)}, status=status.HTTP_200_OK
+        )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER])
+    def unarchive(self, request, slug, project_id, pk=None):
+        issue = Issue.objects.get(
+            workspace__slug=slug,
+            project_id=project_id,
+            archived_at__isnull=False,
+            pk=pk,
+        )
+        issue_activity.delay(
+            type="issue.activity.updated",
+            requested_data=json.dumps({"archived_at": None}),
+            actor_id=str(request.user.id),
+            issue_id=str(issue.id),
+            project_id=str(project_id),
+            current_instance=json.dumps(
+                IssueSerializer(issue).data, cls=DjangoJSONEncoder
+            ),
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        issue.archived_at = None
+        issue.save()
+
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+
+class BulkArchiveIssuesEndpoint(BaseAPIView):
+    permission_classes = [ProjectEntityPermission]
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER])
+    def post(self, request, slug, project_id):
+        issue_ids = request.data.get("issue_ids", [])
+
+        if not len(issue_ids):
+            return Response(
+                {"error": "Issue IDs are required"}, status=status.HTTP_400_BAD_REQUEST
+            )
+
+        issues = Issue.objects.filter(
+            workspace__slug=slug, project_id=project_id, pk__in=issue_ids
+        ).select_related("state")
+        bulk_archive_issues = []
+        for issue in issues:
+            if issue.state.group not in ["completed", "cancelled"]:
+                return Response(
+                    {
+                        "error_code": ERROR_CODES["INVALID_ARCHIVE_STATE_GROUP"],
+                        "error_message": "INVALID_ARCHIVE_STATE_GROUP",
+                    },
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+            issue_activity.delay(
+                type="issue.activity.updated",
+                requested_data=json.dumps(
+                    {"archived_at": str(timezone.now().date()), "automation": False}
+                ),
+                actor_id=str(request.user.id),
+                issue_id=str(issue.id),
+                project_id=str(project_id),
+                current_instance=json.dumps(
+                    IssueSerializer(issue).data, cls=DjangoJSONEncoder
+                ),
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            issue.archived_at = timezone.now().date()
+            bulk_archive_issues.append(issue)
+        Issue.objects.bulk_update(bulk_archive_issues, ["archived_at"])
+
+        return Response(
+            {"archived_at": str(timezone.now().date())}, status=status.HTTP_200_OK
+        )

apps/api/plane/app/views/issue/attachment.py

@@ -0,0 +1,228 @@
+# Python imports
+import json
+import uuid
+
+# Django imports
+from django.utils import timezone
+from django.core.serializers.json import DjangoJSONEncoder
+from django.conf import settings
+from django.http import HttpResponseRedirect
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+from rest_framework.parsers import MultiPartParser, FormParser
+
+# Module imports
+from .. import BaseAPIView
+from plane.app.serializers import IssueAttachmentSerializer
+from plane.db.models import FileAsset, Workspace
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.app.permissions import allow_permission, ROLE
+from plane.settings.storage import S3Storage
+from plane.bgtasks.storage_metadata_task import get_asset_object_metadata
+from plane.utils.host import base_host
+
+
+class IssueAttachmentEndpoint(BaseAPIView):
+    serializer_class = IssueAttachmentSerializer
+    model = FileAsset
+    parser_classes = (MultiPartParser, FormParser)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def post(self, request, slug, project_id, issue_id):
+        serializer = IssueAttachmentSerializer(data=request.data)
+        workspace = Workspace.objects.get(slug=slug)
+        if serializer.is_valid():
+            serializer.save(
+                project_id=project_id,
+                issue_id=issue_id,
+                workspace_id=workspace.id,
+                entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+            )
+            issue_activity.delay(
+                type="attachment.activity.created",
+                requested_data=None,
+                actor_id=str(self.request.user.id),
+                issue_id=str(self.kwargs.get("issue_id", None)),
+                project_id=str(self.kwargs.get("project_id", None)),
+                current_instance=json.dumps(serializer.data, cls=DjangoJSONEncoder),
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    @allow_permission([ROLE.ADMIN], creator=True, model=FileAsset)
+    def delete(self, request, slug, project_id, issue_id, pk):
+        issue_attachment = FileAsset.objects.get(pk=pk)
+        issue_attachment.asset.delete(save=False)
+        issue_attachment.delete()
+        issue_activity.delay(
+            type="attachment.activity.deleted",
+            requested_data=None,
+            actor_id=str(self.request.user.id),
+            issue_id=str(self.kwargs.get("issue_id", None)),
+            project_id=str(self.kwargs.get("project_id", None)),
+            current_instance=None,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def get(self, request, slug, project_id, issue_id):
+        issue_attachments = FileAsset.objects.filter(
+            issue_id=issue_id, workspace__slug=slug, project_id=project_id
+        )
+        serializer = IssueAttachmentSerializer(issue_attachments, many=True)
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+
+class IssueAttachmentV2Endpoint(BaseAPIView):
+    serializer_class = IssueAttachmentSerializer
+    model = FileAsset
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def post(self, request, slug, project_id, issue_id):
+        name = request.data.get("name")
+        type = request.data.get("type", False)
+        size = int(request.data.get("size", settings.FILE_SIZE_LIMIT))
+
+        if not type or type not in settings.ATTACHMENT_MIME_TYPES:
+            return Response(
+                {"error": "Invalid file type.", "status": False},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        # Get the workspace
+        workspace = Workspace.objects.get(slug=slug)
+
+        # asset key
+        asset_key = f"{workspace.id}/{uuid.uuid4().hex}-{name}"
+
+        # Get the size limit
+        size_limit = min(size, settings.FILE_SIZE_LIMIT)
+
+        # Create a File Asset
+        asset = FileAsset.objects.create(
+            attributes={"name": name, "type": type, "size": size_limit},
+            asset=asset_key,
+            size=size_limit,
+            workspace_id=workspace.id,
+            created_by=request.user,
+            issue_id=issue_id,
+            project_id=project_id,
+            entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+        )
+
+        # Get the presigned URL
+        storage = S3Storage(request=request)
+
+        # Generate a presigned URL to share an S3 object
+        presigned_url = storage.generate_presigned_post(
+            object_name=asset_key, file_type=type, file_size=size_limit
+        )
+
+        # Return the presigned URL
+        return Response(
+            {
+                "upload_data": presigned_url,
+                "asset_id": str(asset.id),
+                "attachment": IssueAttachmentSerializer(asset).data,
+                "asset_url": asset.asset_url,
+            },
+            status=status.HTTP_200_OK,
+        )
+
+    @allow_permission([ROLE.ADMIN], creator=True, model=FileAsset)
+    def delete(self, request, slug, project_id, issue_id, pk):
+        issue_attachment = FileAsset.objects.get(
+            pk=pk, workspace__slug=slug, project_id=project_id
+        )
+        issue_attachment.is_deleted = True
+        issue_attachment.deleted_at = timezone.now()
+        issue_attachment.save()
+
+        issue_activity.delay(
+            type="attachment.activity.deleted",
+            requested_data=None,
+            actor_id=str(self.request.user.id),
+            issue_id=str(issue_id),
+            project_id=str(project_id),
+            current_instance=None,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def get(self, request, slug, project_id, issue_id, pk=None):
+        if pk:
+            # Get the asset
+            asset = FileAsset.objects.get(
+                id=pk, workspace__slug=slug, project_id=project_id
+            )
+
+            # Check if the asset is uploaded
+            if not asset.is_uploaded:
+                return Response(
+                    {"error": "The asset is not uploaded.", "status": False},
+                    status=status.HTTP_400_BAD_REQUEST,
+                )
+
+            storage = S3Storage(request=request)
+            presigned_url = storage.generate_presigned_url(
+                object_name=asset.asset.name,
+                disposition="attachment",
+                filename=asset.attributes.get("name"),
+            )
+            return HttpResponseRedirect(presigned_url)
+
+        # Get all the attachments
+        issue_attachments = FileAsset.objects.filter(
+            issue_id=issue_id,
+            entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+            workspace__slug=slug,
+            project_id=project_id,
+            is_uploaded=True,
+        )
+        # Serialize the attachments
+        serializer = IssueAttachmentSerializer(issue_attachments, many=True)
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def patch(self, request, slug, project_id, issue_id, pk):
+        issue_attachment = FileAsset.objects.get(
+            pk=pk, workspace__slug=slug, project_id=project_id
+        )
+        serializer = IssueAttachmentSerializer(issue_attachment)
+
+        # Send this activity only if the attachment is not uploaded before
+        if not issue_attachment.is_uploaded:
+            issue_activity.delay(
+                type="attachment.activity.created",
+                requested_data=None,
+                actor_id=str(self.request.user.id),
+                issue_id=str(self.kwargs.get("issue_id", None)),
+                project_id=str(self.kwargs.get("project_id", None)),
+                current_instance=json.dumps(serializer.data, cls=DjangoJSONEncoder),
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+
+            # Update the attachment
+            issue_attachment.is_uploaded = True
+            issue_attachment.created_by = request.user
+
+        # Get the storage metadata
+        if not issue_attachment.storage_metadata:
+            get_asset_object_metadata.delay(str(issue_attachment.id))
+        issue_attachment.save()
+        return Response(status=status.HTTP_204_NO_CONTENT)

apps/api/plane/app/views/issue/comment.py

@@ -0,0 +1,250 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.db.models import Exists
+from django.core.serializers.json import DjangoJSONEncoder
+from django.db import IntegrityError
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet
+from plane.app.serializers import IssueCommentSerializer, CommentReactionSerializer
+from plane.app.permissions import allow_permission, ROLE
+from plane.db.models import IssueComment, ProjectMember, CommentReaction, Project, Issue
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.utils.host import base_host
+from plane.bgtasks.webhook_task import model_activity
+
+
+class IssueCommentViewSet(BaseViewSet):
+    serializer_class = IssueCommentSerializer
+    model = IssueComment
+    webhook_event = "issue_comment"
+
+    filterset_fields = ["issue__id", "workspace__id"]
+
+    def get_queryset(self):
+        return self.filter_queryset(
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(issue_id=self.kwargs.get("issue_id"))
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+            )
+            .select_related("project")
+            .select_related("workspace")
+            .select_related("issue")
+            .annotate(
+                is_member=Exists(
+                    ProjectMember.objects.filter(
+                        workspace__slug=self.kwargs.get("slug"),
+                        project_id=self.kwargs.get("project_id"),
+                        member_id=self.request.user.id,
+                        is_active=True,
+                    )
+                )
+            )
+            .distinct()
+        )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def create(self, request, slug, project_id, issue_id):
+        project = Project.objects.get(pk=project_id)
+        issue = Issue.objects.get(pk=issue_id)
+        if (
+            ProjectMember.objects.filter(
+                workspace__slug=slug,
+                project_id=project_id,
+                member=request.user,
+                role=5,
+                is_active=True,
+            ).exists()
+            and not project.guest_view_all_features
+            and not issue.created_by == request.user
+        ):
+            return Response(
+                {"error": "You are not allowed to comment on the issue"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        serializer = IssueCommentSerializer(data=request.data)
+        if serializer.is_valid():
+            serializer.save(
+                project_id=project_id, issue_id=issue_id, actor=request.user
+            )
+            issue_activity.delay(
+                type="comment.activity.created",
+                requested_data=json.dumps(serializer.data, cls=DjangoJSONEncoder),
+                actor_id=str(self.request.user.id),
+                issue_id=str(self.kwargs.get("issue_id")),
+                project_id=str(self.kwargs.get("project_id")),
+                current_instance=None,
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            # Send the model activity
+            model_activity.delay(
+                model_name="issue_comment",
+                model_id=str(serializer.data["id"]),
+                requested_data=request.data,
+                current_instance=None,
+                actor_id=request.user.id,
+                slug=slug,
+                origin=base_host(request=request, is_app=True),
+            )
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    @allow_permission(allowed_roles=[ROLE.ADMIN], creator=True, model=IssueComment)
+    def partial_update(self, request, slug, project_id, issue_id, pk):
+        issue_comment = IssueComment.objects.get(
+            workspace__slug=slug, project_id=project_id, issue_id=issue_id, pk=pk
+        )
+        requested_data = json.dumps(self.request.data, cls=DjangoJSONEncoder)
+        current_instance = json.dumps(
+            IssueCommentSerializer(issue_comment).data, cls=DjangoJSONEncoder
+        )
+        serializer = IssueCommentSerializer(
+            issue_comment, data=request.data, partial=True
+        )
+        if serializer.is_valid():
+            if (
+                "comment_html" in request.data
+                and request.data["comment_html"] != issue_comment.comment_html
+            ):
+                serializer.save(edited_at=timezone.now())
+            else:
+                serializer.save()
+            issue_activity.delay(
+                type="comment.activity.updated",
+                requested_data=requested_data,
+                actor_id=str(request.user.id),
+                issue_id=str(issue_id),
+                project_id=str(project_id),
+                current_instance=current_instance,
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            # Send the model activity
+            model_activity.delay(
+                model_name="issue_comment",
+                model_id=str(pk),
+                requested_data=request.data,
+                current_instance=current_instance,
+                actor_id=request.user.id,
+                slug=slug,
+                origin=base_host(request=request, is_app=True),
+            )
+            return Response(serializer.data, status=status.HTTP_200_OK)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    @allow_permission(allowed_roles=[ROLE.ADMIN], creator=True, model=IssueComment)
+    def destroy(self, request, slug, project_id, issue_id, pk):
+        issue_comment = IssueComment.objects.get(
+            workspace__slug=slug, project_id=project_id, issue_id=issue_id, pk=pk
+        )
+        current_instance = json.dumps(
+            IssueCommentSerializer(issue_comment).data, cls=DjangoJSONEncoder
+        )
+        issue_comment.delete()
+        issue_activity.delay(
+            type="comment.activity.deleted",
+            requested_data=json.dumps({"comment_id": str(pk)}),
+            actor_id=str(request.user.id),
+            issue_id=str(issue_id),
+            project_id=str(project_id),
+            current_instance=current_instance,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+
+class CommentReactionViewSet(BaseViewSet):
+    serializer_class = CommentReactionSerializer
+    model = CommentReaction
+
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(comment_id=self.kwargs.get("comment_id"))
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+            )
+            .order_by("-created_at")
+            .distinct()
+        )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def create(self, request, slug, project_id, comment_id):
+        try:
+            serializer = CommentReactionSerializer(data=request.data)
+            if serializer.is_valid():
+                serializer.save(
+                    project_id=project_id,
+                    actor_id=request.user.id,
+                    comment_id=comment_id,
+                )
+                issue_activity.delay(
+                    type="comment_reaction.activity.created",
+                    requested_data=json.dumps(request.data, cls=DjangoJSONEncoder),
+                    actor_id=str(request.user.id),
+                    issue_id=None,
+                    project_id=str(project_id),
+                    current_instance=None,
+                    epoch=int(timezone.now().timestamp()),
+                    notification=True,
+                    origin=base_host(request=request, is_app=True),
+                )
+                return Response(serializer.data, status=status.HTTP_201_CREATED)
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+        except IntegrityError:
+            return Response(
+                {"error": "Reaction already exists for the user"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def destroy(self, request, slug, project_id, comment_id, reaction_code):
+        comment_reaction = CommentReaction.objects.get(
+            workspace__slug=slug,
+            project_id=project_id,
+            comment_id=comment_id,
+            reaction=reaction_code,
+            actor=request.user,
+        )
+        issue_activity.delay(
+            type="comment_reaction.activity.deleted",
+            requested_data=None,
+            actor_id=str(self.request.user.id),
+            issue_id=None,
+            project_id=str(self.kwargs.get("project_id", None)),
+            current_instance=json.dumps(
+                {
+                    "reaction": str(reaction_code),
+                    "identifier": str(comment_reaction.id),
+                    "comment_id": str(comment_id),
+                }
+            ),
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        comment_reaction.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)

apps/api/plane/app/views/issue/label.py

@@ -0,0 +1,106 @@
+# Python imports
+import random
+
+# Django imports
+from django.db import IntegrityError
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet, BaseAPIView
+from plane.app.serializers import LabelSerializer
+from plane.app.permissions import allow_permission, ProjectBasePermission, ROLE
+from plane.db.models import Project, Label
+from plane.utils.cache import invalidate_cache
+
+
+class LabelViewSet(BaseViewSet):
+    serializer_class = LabelSerializer
+    model = Label
+    permission_classes = [ProjectBasePermission]
+
+    def get_queryset(self):
+        return self.filter_queryset(
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(project__project_projectmember__member=self.request.user)
+            .select_related("project")
+            .select_related("workspace")
+            .select_related("parent")
+            .distinct()
+            .order_by("sort_order")
+        )
+
+    @invalidate_cache(
+        path="/api/workspaces/:slug/labels/", url_params=True, user=False, multiple=True
+    )
+    @allow_permission([ROLE.ADMIN])
+    def create(self, request, slug, project_id):
+        try:
+            serializer = LabelSerializer(data=request.data)
+            if serializer.is_valid():
+                serializer.save(project_id=project_id)
+                return Response(serializer.data, status=status.HTTP_201_CREATED)
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+        except IntegrityError:
+            return Response(
+                {"error": "Label with the same name already exists in the project"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+    @invalidate_cache(path="/api/workspaces/:slug/labels/", url_params=True, user=False)
+    @allow_permission([ROLE.ADMIN])
+    def partial_update(self, request, *args, **kwargs):
+        # Check if the label name is unique within the project
+        if (
+            "name" in request.data
+            and Label.objects.filter(
+                project_id=kwargs["project_id"], name=request.data["name"]
+            )
+            .exclude(pk=kwargs["pk"])
+            .exists()
+        ):
+            return Response(
+                {"error": "Label with the same name already exists in the project"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        # call the parent method to perform the update
+        return super().partial_update(request, *args, **kwargs)
+
+    @invalidate_cache(path="/api/workspaces/:slug/labels/", url_params=True, user=False)
+    @allow_permission([ROLE.ADMIN])
+    def destroy(self, request, *args, **kwargs):
+        return super().destroy(request, *args, **kwargs)
+
+
+class BulkCreateIssueLabelsEndpoint(BaseAPIView):
+    @allow_permission([ROLE.ADMIN])
+    def post(self, request, slug, project_id):
+        label_data = request.data.get("label_data", [])
+        project = Project.objects.get(pk=project_id)
+
+        labels = Label.objects.bulk_create(
+            [
+                Label(
+                    name=label.get("name", "Migrated"),
+                    description=label.get("description", "Migrated Issue"),
+                    color=f"#{random.randint(0, 0xFFFFFF + 1):06X}",
+                    project_id=project_id,
+                    workspace_id=project.workspace_id,
+                    created_by=request.user,
+                    updated_by=request.user,
+                )
+                for label in label_data
+            ],
+            batch_size=50,
+            ignore_conflicts=True,
+        )
+
+        return Response(
+            {"labels": LabelSerializer(labels, many=True).data},
+            status=status.HTTP_201_CREATED,
+        )

apps/api/plane/app/views/issue/link.py

@@ -0,0 +1,121 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.core.serializers.json import DjangoJSONEncoder
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet
+from plane.app.serializers import IssueLinkSerializer
+from plane.app.permissions import ProjectEntityPermission
+from plane.db.models import IssueLink
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.bgtasks.work_item_link_task import crawl_work_item_link_title
+from plane.utils.host import base_host
+
+
+class IssueLinkViewSet(BaseViewSet):
+    permission_classes = [ProjectEntityPermission]
+
+    model = IssueLink
+    serializer_class = IssueLinkSerializer
+
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(issue_id=self.kwargs.get("issue_id"))
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+            )
+            .order_by("-created_at")
+            .distinct()
+        )
+
+    def create(self, request, slug, project_id, issue_id):
+        serializer = IssueLinkSerializer(data=request.data)
+        if serializer.is_valid():
+            serializer.save(project_id=project_id, issue_id=issue_id)
+            crawl_work_item_link_title.delay(
+                serializer.data.get("id"), serializer.data.get("url")
+            )
+            issue_activity.delay(
+                type="link.activity.created",
+                requested_data=json.dumps(serializer.data, cls=DjangoJSONEncoder),
+                actor_id=str(self.request.user.id),
+                issue_id=str(self.kwargs.get("issue_id")),
+                project_id=str(self.kwargs.get("project_id")),
+                current_instance=None,
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+
+            issue_link = self.get_queryset().get(id=serializer.data.get("id"))
+            serializer = IssueLinkSerializer(issue_link)
+
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    def partial_update(self, request, slug, project_id, issue_id, pk):
+        issue_link = IssueLink.objects.get(
+            workspace__slug=slug, project_id=project_id, issue_id=issue_id, pk=pk
+        )
+        requested_data = json.dumps(request.data, cls=DjangoJSONEncoder)
+        current_instance = json.dumps(
+            IssueLinkSerializer(issue_link).data, cls=DjangoJSONEncoder
+        )
+
+        serializer = IssueLinkSerializer(issue_link, data=request.data, partial=True)
+        if serializer.is_valid():
+            serializer.save()
+            crawl_work_item_link_title.delay(
+                serializer.data.get("id"), serializer.data.get("url")
+            )
+
+            issue_activity.delay(
+                type="link.activity.updated",
+                requested_data=requested_data,
+                actor_id=str(request.user.id),
+                issue_id=str(issue_id),
+                project_id=str(project_id),
+                current_instance=current_instance,
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            issue_link = self.get_queryset().get(id=serializer.data.get("id"))
+            serializer = IssueLinkSerializer(issue_link)
+
+            return Response(serializer.data, status=status.HTTP_200_OK)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    def destroy(self, request, slug, project_id, issue_id, pk):
+        issue_link = IssueLink.objects.get(
+            workspace__slug=slug, project_id=project_id, issue_id=issue_id, pk=pk
+        )
+        current_instance = json.dumps(
+            IssueLinkSerializer(issue_link).data, cls=DjangoJSONEncoder
+        )
+        issue_activity.delay(
+            type="link.activity.deleted",
+            requested_data=json.dumps({"link_id": str(pk)}),
+            actor_id=str(request.user.id),
+            issue_id=str(issue_id),
+            project_id=str(project_id),
+            current_instance=current_instance,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        issue_link.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)

apps/api/plane/app/views/issue/reaction.py

@@ -0,0 +1,85 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.core.serializers.json import DjangoJSONEncoder
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet
+from plane.app.serializers import IssueReactionSerializer
+from plane.app.permissions import allow_permission, ROLE
+from plane.db.models import IssueReaction
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.utils.host import base_host
+
+
+class IssueReactionViewSet(BaseViewSet):
+    serializer_class = IssueReactionSerializer
+    model = IssueReaction
+
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(issue_id=self.kwargs.get("issue_id"))
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+            )
+            .order_by("-created_at")
+            .distinct()
+        )
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def create(self, request, slug, project_id, issue_id):
+        serializer = IssueReactionSerializer(data=request.data)
+        if serializer.is_valid():
+            serializer.save(
+                issue_id=issue_id, project_id=project_id, actor=request.user
+            )
+            issue_activity.delay(
+                type="issue_reaction.activity.created",
+                requested_data=json.dumps(request.data, cls=DjangoJSONEncoder),
+                actor_id=str(request.user.id),
+                issue_id=str(issue_id),
+                project_id=str(project_id),
+                current_instance=None,
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            return Response(serializer.data, status=status.HTTP_201_CREATED)
+        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
+
+    @allow_permission([ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def destroy(self, request, slug, project_id, issue_id, reaction_code):
+        issue_reaction = IssueReaction.objects.get(
+            workspace__slug=slug,
+            project_id=project_id,
+            issue_id=issue_id,
+            reaction=reaction_code,
+            actor=request.user,
+        )
+        issue_activity.delay(
+            type="issue_reaction.activity.deleted",
+            requested_data=None,
+            actor_id=str(self.request.user.id),
+            issue_id=str(self.kwargs.get("issue_id", None)),
+            project_id=str(self.kwargs.get("project_id", None)),
+            current_instance=json.dumps(
+                {"reaction": str(reaction_code), "identifier": str(issue_reaction.id)}
+            ),
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        issue_reaction.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)

apps/api/plane/app/views/issue/relation.py

@@ -0,0 +1,296 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.db.models import Q, OuterRef, F, Func, UUIDField, Value, CharField, Subquery
+from django.core.serializers.json import DjangoJSONEncoder
+from django.db.models.functions import Coalesce
+from django.contrib.postgres.aggregates import ArrayAgg
+from django.contrib.postgres.fields import ArrayField
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet
+from plane.app.serializers import IssueRelationSerializer, RelatedIssueSerializer
+from plane.app.permissions import ProjectEntityPermission
+from plane.db.models import (
+    Project,
+    IssueRelation,
+    Issue,
+    FileAsset,
+    IssueLink,
+    CycleIssue,
+)
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.utils.issue_relation_mapper import get_actual_relation
+from plane.utils.host import base_host
+
+
+class IssueRelationViewSet(BaseViewSet):
+    serializer_class = IssueRelationSerializer
+    model = IssueRelation
+    permission_classes = [ProjectEntityPermission]
+
+    def list(self, request, slug, project_id, issue_id):
+        issue_relations = (
+            IssueRelation.objects.filter(
+                Q(issue_id=issue_id) | Q(related_issue=issue_id)
+            )
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .select_related("project")
+            .select_related("workspace")
+            .select_related("issue")
+            .order_by("-created_at")
+            .distinct()
+        )
+        # get all blocking issues
+        blocking_issues = issue_relations.filter(
+            relation_type="blocked_by", related_issue_id=issue_id
+        ).values_list("issue_id", flat=True)
+
+        # get all blocked by issues
+        blocked_by_issues = issue_relations.filter(
+            relation_type="blocked_by", issue_id=issue_id
+        ).values_list("related_issue_id", flat=True)
+
+        # get all duplicate issues
+        duplicate_issues = issue_relations.filter(
+            issue_id=issue_id, relation_type="duplicate"
+        ).values_list("related_issue_id", flat=True)
+
+        # get all relates to issues
+        duplicate_issues_related = issue_relations.filter(
+            related_issue_id=issue_id, relation_type="duplicate"
+        ).values_list("issue_id", flat=True)
+
+        # get all relates to issues
+        relates_to_issues = issue_relations.filter(
+            issue_id=issue_id, relation_type="relates_to"
+        ).values_list("related_issue_id", flat=True)
+
+        # get all relates to issues
+        relates_to_issues_related = issue_relations.filter(
+            related_issue_id=issue_id, relation_type="relates_to"
+        ).values_list("issue_id", flat=True)
+
+        # get all start after issues
+        start_after_issues = issue_relations.filter(
+            relation_type="start_before", related_issue_id=issue_id
+        ).values_list("issue_id", flat=True)
+
+        # get all start_before issues
+        start_before_issues = issue_relations.filter(
+            relation_type="start_before", issue_id=issue_id
+        ).values_list("related_issue_id", flat=True)
+
+        # get all finish after issues
+        finish_after_issues = issue_relations.filter(
+            relation_type="finish_before", related_issue_id=issue_id
+        ).values_list("issue_id", flat=True)
+
+        # get all finish before issues
+        finish_before_issues = issue_relations.filter(
+            relation_type="finish_before", issue_id=issue_id
+        ).values_list("related_issue_id", flat=True)
+
+        queryset = (
+            Issue.issue_objects.filter(workspace__slug=slug)
+            .select_related("workspace", "project", "state", "parent")
+            .prefetch_related("assignees", "labels", "issue_module__module")
+            .annotate(
+                cycle_id=Subquery(
+                    CycleIssue.objects.filter(
+                        issue=OuterRef("id"), deleted_at__isnull=True
+                    ).values("cycle_id")[:1]
+                )
+            )
+            .annotate(
+                link_count=IssueLink.objects.filter(issue=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                attachment_count=FileAsset.objects.filter(
+                    issue_id=OuterRef("id"),
+                    entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+                )
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                sub_issues_count=Issue.issue_objects.filter(parent=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                label_ids=Coalesce(
+                    ArrayAgg(
+                        "labels__id",
+                        distinct=True,
+                        filter=Q(
+                            ~Q(labels__id__isnull=True)
+                            & (Q(label_issue__deleted_at__isnull=True))
+                        ),
+                    ),
+                    Value([], output_field=ArrayField(UUIDField())),
+                ),
+                assignee_ids=Coalesce(
+                    ArrayAgg(
+                        "assignees__id",
+                        distinct=True,
+                        filter=Q(
+                            ~Q(assignees__id__isnull=True)
+                            & Q(assignees__member_project__is_active=True)
+                            & Q(issue_assignee__deleted_at__isnull=True)
+                        ),
+                    ),
+                    Value([], output_field=ArrayField(UUIDField())),
+                ),
+            )
+        ).distinct()
+
+        # Fields
+        fields = [
+            "id",
+            "name",
+            "state_id",
+            "sort_order",
+            "priority",
+            "sequence_id",
+            "project_id",
+            "label_ids",
+            "assignee_ids",
+            "created_at",
+            "updated_at",
+            "created_by",
+            "updated_by",
+            "relation_type",
+        ]
+
+        response_data = {
+            "blocking": queryset.filter(pk__in=blocking_issues)
+            .annotate(relation_type=Value("blocking", output_field=CharField()))
+            .values(*fields),
+            "blocked_by": queryset.filter(pk__in=blocked_by_issues)
+            .annotate(relation_type=Value("blocked_by", output_field=CharField()))
+            .values(*fields),
+            "duplicate": queryset.filter(pk__in=duplicate_issues)
+            .annotate(relation_type=Value("duplicate", output_field=CharField()))
+            .values(*fields)
+            | queryset.filter(pk__in=duplicate_issues_related)
+            .annotate(relation_type=Value("duplicate", output_field=CharField()))
+            .values(*fields),
+            "relates_to": queryset.filter(pk__in=relates_to_issues)
+            .annotate(relation_type=Value("relates_to", output_field=CharField()))
+            .values(*fields)
+            | queryset.filter(pk__in=relates_to_issues_related)
+            .annotate(relation_type=Value("relates_to", output_field=CharField()))
+            .values(*fields),
+            "start_after": queryset.filter(pk__in=start_after_issues)
+            .annotate(relation_type=Value("start_after", output_field=CharField()))
+            .values(*fields),
+            "start_before": queryset.filter(pk__in=start_before_issues)
+            .annotate(relation_type=Value("start_before", output_field=CharField()))
+            .values(*fields),
+            "finish_after": queryset.filter(pk__in=finish_after_issues)
+            .annotate(relation_type=Value("finish_after", output_field=CharField()))
+            .values(*fields),
+            "finish_before": queryset.filter(pk__in=finish_before_issues)
+            .annotate(relation_type=Value("finish_before", output_field=CharField()))
+            .values(*fields),
+        }
+
+        return Response(response_data, status=status.HTTP_200_OK)
+
+    def create(self, request, slug, project_id, issue_id):
+        relation_type = request.data.get("relation_type", None)
+        if relation_type is None:
+            return Response(
+                {"message": "Issue relation type is required"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        issues = request.data.get("issues", [])
+        project = Project.objects.get(pk=project_id)
+
+        issue_relation = IssueRelation.objects.bulk_create(
+            [
+                IssueRelation(
+                    issue_id=(
+                        issue
+                        if relation_type in ["blocking", "start_after", "finish_after"]
+                        else issue_id
+                    ),
+                    related_issue_id=(
+                        issue_id
+                        if relation_type in ["blocking", "start_after", "finish_after"]
+                        else issue
+                    ),
+                    relation_type=(get_actual_relation(relation_type)),
+                    project_id=project_id,
+                    workspace_id=project.workspace_id,
+                    created_by=request.user,
+                    updated_by=request.user,
+                )
+                for issue in issues
+            ],
+            batch_size=10,
+            ignore_conflicts=True,
+        )
+
+        issue_activity.delay(
+            type="issue_relation.activity.created",
+            requested_data=json.dumps(request.data, cls=DjangoJSONEncoder),
+            actor_id=str(request.user.id),
+            issue_id=str(issue_id),
+            project_id=str(project_id),
+            current_instance=None,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+
+        if relation_type in ["blocking", "start_after", "finish_after"]:
+            return Response(
+                RelatedIssueSerializer(issue_relation, many=True).data,
+                status=status.HTTP_201_CREATED,
+            )
+        else:
+            return Response(
+                IssueRelationSerializer(issue_relation, many=True).data,
+                status=status.HTTP_201_CREATED,
+            )
+
+    def remove_relation(self, request, slug, project_id, issue_id):
+        related_issue = request.data.get("related_issue", None)
+
+        issue_relations = IssueRelation.objects.filter(
+            workspace__slug=slug,
+        ).filter(
+            Q(issue_id=related_issue, related_issue_id=issue_id)
+            | Q(issue_id=issue_id, related_issue_id=related_issue)
+        )
+        issue_relations = issue_relations.first()
+        current_instance = json.dumps(
+            IssueRelationSerializer(issue_relations).data, cls=DjangoJSONEncoder
+        )
+        issue_relations.delete()
+        issue_activity.delay(
+            type="issue_relation.activity.deleted",
+            requested_data=json.dumps(request.data, cls=DjangoJSONEncoder),
+            actor_id=str(request.user.id),
+            issue_id=str(issue_id),
+            project_id=str(project_id),
+            current_instance=current_instance,
+            epoch=int(timezone.now().timestamp()),
+            notification=True,
+            origin=base_host(request=request, is_app=True),
+        )
+        return Response(status=status.HTTP_204_NO_CONTENT)

apps/api/plane/app/views/issue/sub_issue.py

@@ -0,0 +1,224 @@
+# Python imports
+import json
+
+# Django imports
+from django.utils import timezone
+from django.db.models import OuterRef, Func, F, Q, Value, UUIDField, Subquery
+from django.utils.decorators import method_decorator
+from django.views.decorators.gzip import gzip_page
+from django.contrib.postgres.aggregates import ArrayAgg
+from django.contrib.postgres.fields import ArrayField
+from django.db.models.functions import Coalesce
+
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseAPIView
+from plane.app.serializers import IssueSerializer
+from plane.app.permissions import ProjectEntityPermission
+from plane.db.models import Issue, IssueLink, FileAsset, CycleIssue
+from plane.bgtasks.issue_activities_task import issue_activity
+from plane.utils.timezone_converter import user_timezone_converter
+from collections import defaultdict
+from plane.utils.host import base_host
+from plane.utils.order_queryset import order_issue_queryset
+
+
+class SubIssuesEndpoint(BaseAPIView):
+    permission_classes = [ProjectEntityPermission]
+
+    @method_decorator(gzip_page)
+    def get(self, request, slug, project_id, issue_id):
+        sub_issues = (
+            Issue.issue_objects.filter(parent_id=issue_id, workspace__slug=slug)
+            .select_related("workspace", "project", "state", "parent")
+            .prefetch_related("assignees", "labels", "issue_module__module")
+            .annotate(
+                cycle_id=Subquery(
+                    CycleIssue.objects.filter(
+                        issue=OuterRef("id"), deleted_at__isnull=True
+                    ).values("cycle_id")[:1]
+                )
+            )
+            .annotate(
+                link_count=IssueLink.objects.filter(issue=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                attachment_count=FileAsset.objects.filter(
+                    issue_id=OuterRef("id"),
+                    entity_type=FileAsset.EntityTypeContext.ISSUE_ATTACHMENT,
+                )
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                sub_issues_count=Issue.issue_objects.filter(parent=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+            .annotate(
+                label_ids=Coalesce(
+                    ArrayAgg(
+                        "labels__id",
+                        distinct=True,
+                        filter=Q(
+                            ~Q(labels__id__isnull=True)
+                            & Q(label_issue__deleted_at__isnull=True)
+                        ),
+                    ),
+                    Value([], output_field=ArrayField(UUIDField())),
+                ),
+                assignee_ids=Coalesce(
+                    ArrayAgg(
+                        "assignees__id",
+                        distinct=True,
+                        filter=Q(
+                            ~Q(assignees__id__isnull=True)
+                            & Q(assignees__member_project__is_active=True)
+                            & Q(issue_assignee__deleted_at__isnull=True)
+                        ),
+                    ),
+                    Value([], output_field=ArrayField(UUIDField())),
+                ),
+                module_ids=Coalesce(
+                    ArrayAgg(
+                        "issue_module__module_id",
+                        distinct=True,
+                        filter=Q(
+                            ~Q(issue_module__module_id__isnull=True)
+                            & Q(issue_module__module__archived_at__isnull=True)
+                            & Q(issue_module__deleted_at__isnull=True)
+                        ),
+                    ),
+                    Value([], output_field=ArrayField(UUIDField())),
+                ),
+            )
+            .annotate(state_group=F("state__group"))
+            .order_by("-created_at")
+        )
+
+        # Ordering
+        order_by_param = request.GET.get("order_by", "-created_at")
+        group_by = request.GET.get("group_by", False)
+
+        if order_by_param:
+            sub_issues, order_by_param = order_issue_queryset(
+                sub_issues, order_by_param
+            )
+
+        # create's a dict with state group name with their respective issue id's
+        result = defaultdict(list)
+        for sub_issue in sub_issues:
+            result[sub_issue.state_group].append(str(sub_issue.id))
+
+        sub_issues = sub_issues.values(
+            "id",
+            "name",
+            "state_id",
+            "sort_order",
+            "completed_at",
+            "estimate_point",
+            "priority",
+            "start_date",
+            "target_date",
+            "sequence_id",
+            "project_id",
+            "parent_id",
+            "cycle_id",
+            "module_ids",
+            "label_ids",
+            "assignee_ids",
+            "sub_issues_count",
+            "created_at",
+            "updated_at",
+            "created_by",
+            "updated_by",
+            "attachment_count",
+            "link_count",
+            "is_draft",
+            "archived_at",
+        )
+        datetime_fields = ["created_at", "updated_at"]
+        sub_issues = user_timezone_converter(
+            sub_issues, datetime_fields, request.user.user_timezone
+        )
+        # Grouping
+        if group_by:
+            result_dict = defaultdict(list)
+
+            for issue in sub_issues:
+                if group_by == "assignees__ids":
+                    if issue["assignee_ids"]:
+                        assignee_ids = issue["assignee_ids"]
+                        for assignee_id in assignee_ids:
+                            result_dict[str(assignee_id)].append(issue)
+                    elif issue["assignee_ids"] == []:
+                        result_dict["None"].append(issue)
+
+                elif group_by:
+                    result_dict[str(issue[group_by])].append(issue)
+
+            return Response(
+                {"sub_issues": result_dict, "state_distribution": result},
+                status=status.HTTP_200_OK,
+            )
+        return Response(
+            {"sub_issues": sub_issues, "state_distribution": result},
+            status=status.HTTP_200_OK,
+        )
+
+    # Assign multiple sub issues
+    def post(self, request, slug, project_id, issue_id):
+        parent_issue = Issue.issue_objects.get(pk=issue_id)
+        sub_issue_ids = request.data.get("sub_issue_ids", [])
+
+        if not len(sub_issue_ids):
+            return Response(
+                {"error": "Sub Issue IDs are required"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        sub_issues = Issue.issue_objects.filter(id__in=sub_issue_ids)
+
+        for sub_issue in sub_issues:
+            sub_issue.parent = parent_issue
+
+        _ = Issue.objects.bulk_update(sub_issues, ["parent"], batch_size=10)
+
+        updated_sub_issues = Issue.issue_objects.filter(id__in=sub_issue_ids).annotate(
+            state_group=F("state__group")
+        )
+
+        # Track the issue
+        _ = [
+            issue_activity.delay(
+                type="issue.activity.updated",
+                requested_data=json.dumps({"parent": str(issue_id)}),
+                actor_id=str(request.user.id),
+                issue_id=str(sub_issue_id),
+                project_id=str(project_id),
+                current_instance=json.dumps({"parent": str(sub_issue_id)}),
+                epoch=int(timezone.now().timestamp()),
+                notification=True,
+                origin=base_host(request=request, is_app=True),
+            )
+            for sub_issue_id in sub_issue_ids
+        ]
+
+        # create's a dict with state group name with their respective issue id's
+        result = defaultdict(list)
+        for sub_issue in updated_sub_issues:
+            result[sub_issue.state_group].append(str(sub_issue.id))
+
+        serializer = IssueSerializer(updated_sub_issues, many=True)
+        return Response(
+            {"sub_issues": serializer.data, "state_distribution": result},
+            status=status.HTTP_200_OK,
+        )

apps/api/plane/app/views/issue/subscriber.py

@@ -0,0 +1,100 @@
+# Third Party imports
+from rest_framework.response import Response
+from rest_framework import status
+
+# Module imports
+from .. import BaseViewSet
+from plane.app.serializers import IssueSubscriberSerializer, ProjectMemberLiteSerializer
+from plane.app.permissions import ProjectEntityPermission, ProjectLitePermission
+from plane.db.models import IssueSubscriber, ProjectMember
+
+
+class IssueSubscriberViewSet(BaseViewSet):
+    serializer_class = IssueSubscriberSerializer
+    model = IssueSubscriber
+
+    permission_classes = [ProjectEntityPermission]
+
+    def get_permissions(self):
+        if self.action in ["subscribe", "unsubscribe", "subscription_status"]:
+            self.permission_classes = [ProjectLitePermission]
+        else:
+            self.permission_classes = [ProjectEntityPermission]
+
+        return super(IssueSubscriberViewSet, self).get_permissions()
+
+    def perform_create(self, serializer):
+        serializer.save(
+            project_id=self.kwargs.get("project_id"),
+            issue_id=self.kwargs.get("issue_id"),
+        )
+
+    def get_queryset(self):
+        return (
+            super()
+            .get_queryset()
+            .filter(workspace__slug=self.kwargs.get("slug"))
+            .filter(project_id=self.kwargs.get("project_id"))
+            .filter(issue_id=self.kwargs.get("issue_id"))
+            .filter(
+                project__project_projectmember__member=self.request.user,
+                project__project_projectmember__is_active=True,
+                project__archived_at__isnull=True,
+            )
+            .order_by("-created_at")
+            .distinct()
+        )
+
+    def list(self, request, slug, project_id, issue_id):
+        members = ProjectMember.objects.filter(
+            workspace__slug=slug, project_id=project_id, is_active=True
+        ).select_related("member")
+        serializer = ProjectMemberLiteSerializer(members, many=True)
+        return Response(serializer.data, status=status.HTTP_200_OK)
+
+    def destroy(self, request, slug, project_id, issue_id, subscriber_id):
+        issue_subscriber = IssueSubscriber.objects.get(
+            project=project_id,
+            subscriber=subscriber_id,
+            workspace__slug=slug,
+            issue=issue_id,
+        )
+        issue_subscriber.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    def subscribe(self, request, slug, project_id, issue_id):
+        if IssueSubscriber.objects.filter(
+            issue_id=issue_id,
+            subscriber=request.user,
+            workspace__slug=slug,
+            project=project_id,
+        ).exists():
+            return Response(
+                {"message": "User already subscribed to the issue."},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+
+        subscriber = IssueSubscriber.objects.create(
+            issue_id=issue_id, subscriber_id=request.user.id, project_id=project_id
+        )
+        serializer = IssueSubscriberSerializer(subscriber)
+        return Response(serializer.data, status=status.HTTP_201_CREATED)
+
+    def unsubscribe(self, request, slug, project_id, issue_id):
+        issue_subscriber = IssueSubscriber.objects.get(
+            project=project_id,
+            subscriber=request.user,
+            workspace__slug=slug,
+            issue=issue_id,
+        )
+        issue_subscriber.delete()
+        return Response(status=status.HTTP_204_NO_CONTENT)
+
+    def subscription_status(self, request, slug, project_id, issue_id):
+        issue_subscriber = IssueSubscriber.objects.filter(
+            issue=issue_id,
+            subscriber=request.user,
+            workspace__slug=slug,
+            project=project_id,
+        ).exists()
+        return Response({"subscribed": issue_subscriber}, status=status.HTTP_200_OK)

apps/api/plane/app/views/issue/version.py

@@ -0,0 +1,148 @@
+# Third party imports
+from rest_framework import status
+from rest_framework.response import Response
+
+# Module imports
+from plane.db.models import (
+    IssueVersion,
+    IssueDescriptionVersion,
+    Project,
+    ProjectMember,
+    Issue,
+)
+from ..base import BaseAPIView
+from plane.app.serializers import (
+    IssueVersionDetailSerializer,
+    IssueDescriptionVersionDetailSerializer,
+)
+from plane.app.permissions import allow_permission, ROLE
+from plane.utils.global_paginator import paginate
+from plane.utils.timezone_converter import user_timezone_converter
+
+
+class IssueVersionEndpoint(BaseAPIView):
+    def process_paginated_result(self, fields, results, timezone):
+        paginated_data = results.values(*fields)
+
+        datetime_fields = ["created_at", "updated_at"]
+        paginated_data = user_timezone_converter(
+            paginated_data, datetime_fields, timezone
+        )
+
+        return paginated_data
+
+    @allow_permission(allowed_roles=[ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def get(self, request, slug, project_id, issue_id, pk=None):
+        if pk:
+            issue_version = IssueVersion.objects.get(
+                workspace__slug=slug, project_id=project_id, issue_id=issue_id, pk=pk
+            )
+
+            serializer = IssueVersionDetailSerializer(issue_version)
+            return Response(serializer.data, status=status.HTTP_200_OK)
+
+        cursor = request.GET.get("cursor", None)
+
+        required_fields = [
+            "id",
+            "workspace",
+            "project",
+            "issue",
+            "last_saved_at",
+            "owned_by",
+            "created_at",
+            "updated_at",
+            "created_by",
+            "updated_by",
+        ]
+
+        issue_versions_queryset = IssueVersion.objects.filter(
+            workspace__slug=slug, project_id=project_id, issue_id=issue_id
+        )
+
+        paginated_data = paginate(
+            base_queryset=issue_versions_queryset,
+            queryset=issue_versions_queryset,
+            cursor=cursor,
+            on_result=lambda results: self.process_paginated_result(
+                required_fields, results, request.user.user_timezone
+            ),
+        )
+
+        return Response(paginated_data, status=status.HTTP_200_OK)
+
+
+class WorkItemDescriptionVersionEndpoint(BaseAPIView):
+    def process_paginated_result(self, fields, results, timezone):
+        paginated_data = results.values(*fields)
+
+        datetime_fields = ["created_at", "updated_at"]
+        paginated_data = user_timezone_converter(
+            paginated_data, datetime_fields, timezone
+        )
+
+        return paginated_data
+
+    @allow_permission(allowed_roles=[ROLE.ADMIN, ROLE.MEMBER, ROLE.GUEST])
+    def get(self, request, slug, project_id, work_item_id, pk=None):
+        project = Project.objects.get(pk=project_id)
+        issue = Issue.objects.get(
+            workspace__slug=slug, project_id=project_id, pk=work_item_id
+        )
+
+        if (
+            ProjectMember.objects.filter(
+                workspace__slug=slug,
+                project_id=project_id,
+                member=request.user,
+                role=ROLE.GUEST.value,
+                is_active=True,
+            ).exists()
+            and not project.guest_view_all_features
+            and not issue.created_by == request.user
+        ):
+            return Response(
+                {"error": "You are not allowed to view this issue"},
+                status=status.HTTP_403_FORBIDDEN,
+            )
+
+        if pk:
+            issue_description_version = IssueDescriptionVersion.objects.get(
+                workspace__slug=slug,
+                project_id=project_id,
+                issue_id=work_item_id,
+                pk=pk,
+            )
+
+            serializer = IssueDescriptionVersionDetailSerializer(
+                issue_description_version
+            )
+            return Response(serializer.data, status=status.HTTP_200_OK)
+
+        cursor = request.GET.get("cursor", None)
+
+        required_fields = [
+            "id",
+            "workspace",
+            "project",
+            "issue",
+            "last_saved_at",
+            "owned_by",
+            "created_at",
+            "updated_at",
+            "created_by",
+            "updated_by",
+        ]
+
+        issue_description_versions_queryset = IssueDescriptionVersion.objects.filter(
+            workspace__slug=slug, project_id=project_id, issue_id=work_item_id
+        ).order_by("-created_at")
+        paginated_data = paginate(
+            base_queryset=issue_description_versions_queryset,
+            queryset=issue_description_versions_queryset,
+            cursor=cursor,
+            on_result=lambda results: self.process_paginated_result(
+                required_fields, results, request.user.user_timezone
+            ),
+        )
+        return Response(paginated_data, status=status.HTTP_200_OK)