feat(cache): add targeted server-side response caching

apps/workspaces/signals.py

@@ -1,14 +1,88 @@
-from django.db.models.signals import post_save
-from django.dispatch import receiver
-
-from apps.workspaces.models import Workspace, WorkspaceMembership
+from django.db.models.signals import m2m_changed, post_delete, post_save
+from django.dispatch import receiver
+
+from apps.clients.models import Client
+from apps.projects.models import Project, ProjectRate, ProjectUserRate
+from apps.tags.models import Tag
+from apps.time_entries.models import TimeEntry
+from apps.workspaces.models import Workspace, WorkspaceMembership
+from apps.workspaces.models import PriceUnit, WorkspaceUserRate
+from core.services.cache import (
+    CACHE_NAMESPACE_PRICE_UNITS,
+    CACHE_NAMESPACE_REPORTS,
+    CACHE_NAMESPACE_WORKSPACE_MEMBERSHIPS,
+    CACHE_NAMESPACE_WORKSPACE_RATES,
+    bump_namespace_version,
+)
 
 
 @receiver(post_save, sender=Workspace)
-def create_owner_membership(sender, instance, created, **kwargs):
-    if created:
-        WorkspaceMembership.objects.create(
-            workspace=instance,
-            user=instance.owner,
-            role=WorkspaceMembership.Role.OWNER,
-        )
+def create_owner_membership(sender, instance, created, **kwargs):
+    if created:
+        WorkspaceMembership.objects.create(
+            workspace=instance,
+            user=instance.owner,
+            role=WorkspaceMembership.Role.OWNER,
+        )
+
+
+def _bump_workspace_reports(instance):
+    workspace_id = getattr(instance, "workspace_id", None)
+    if not workspace_id and hasattr(instance, "project"):
+        workspace_id = getattr(instance.project, "workspace_id", None)
+    if workspace_id:
+        bump_namespace_version(CACHE_NAMESPACE_REPORTS, str(workspace_id))
+
+
+def _bump_workspace_memberships(instance):
+    workspace_id = getattr(instance, "workspace_id", None)
+    if workspace_id:
+        bump_namespace_version(CACHE_NAMESPACE_WORKSPACE_MEMBERSHIPS, str(workspace_id))
+
+
+def _bump_workspace_rates(instance):
+    workspace_id = getattr(instance, "workspace_id", None)
+    if workspace_id:
+        bump_namespace_version(CACHE_NAMESPACE_WORKSPACE_RATES, str(workspace_id))
+
+
+@receiver(post_save, sender=TimeEntry)
+@receiver(post_delete, sender=TimeEntry)
+@receiver(post_save, sender=Project)
+@receiver(post_delete, sender=Project)
+@receiver(post_save, sender=Client)
+@receiver(post_delete, sender=Client)
+@receiver(post_save, sender=Tag)
+@receiver(post_delete, sender=Tag)
+@receiver(post_save, sender=ProjectRate)
+@receiver(post_delete, sender=ProjectRate)
+@receiver(post_save, sender=ProjectUserRate)
+@receiver(post_delete, sender=ProjectUserRate)
+def invalidate_workspace_report_cache(sender, instance, **kwargs):
+    _bump_workspace_reports(instance)
+
+
+@receiver(m2m_changed, sender=TimeEntry.tags.through)
+def invalidate_workspace_report_cache_for_tags(sender, instance, action, **kwargs):
+    if action in {"post_add", "post_remove", "post_clear"}:
+        _bump_workspace_reports(instance)
+
+
+@receiver(post_save, sender=WorkspaceMembership)
+@receiver(post_delete, sender=WorkspaceMembership)
+def invalidate_workspace_membership_caches(sender, instance, **kwargs):
+    _bump_workspace_memberships(instance)
+    _bump_workspace_reports(instance)
+
+
+@receiver(post_save, sender=WorkspaceUserRate)
+@receiver(post_delete, sender=WorkspaceUserRate)
+def invalidate_workspace_rate_caches(sender, instance, **kwargs):
+    _bump_workspace_rates(instance)
+    _bump_workspace_reports(instance)
+
+
+@receiver(post_save, sender=PriceUnit)
+@receiver(post_delete, sender=PriceUnit)
+def invalidate_price_unit_cache(sender, instance, **kwargs):
+    bump_namespace_version(CACHE_NAMESPACE_PRICE_UNITS)