feat(cases): add case visibility notificaiton

src/dispatch/case/messaging.py

@@ -28,6 +28,7 @@
     CASE_TYPE_CHANGE,
     CASE_SEVERITY_CHANGE,
     CASE_PRIORITY_CHANGE,
+    CASE_VISIBILITY_CHANGE,
     CASE_CLOSED_RATING_FEEDBACK_NOTIFICATION,
     MessageType,
     generate_welcome_message,
@@ -219,6 +220,10 @@ def send_case_update_notifications(case: Case, previous_case: CaseRead, db_sessi
                 change = True
                 notification_template.append(CASE_PRIORITY_CHANGE)
 
+            if previous_case.visibility != case.visibility:
+                change = True
+                notification_template.append(CASE_VISIBILITY_CHANGE)
+
     if not change:
         # we don't need to send notifications
         log.debug("Case updated notifications not sent. No changes were made.")
@@ -251,6 +256,8 @@ def send_case_update_notifications(case: Case, previous_case: CaseRead, db_sessi
                 case_status_old=previous_case.status,
                 case_type_new=case.case_type.name,
                 case_type_old=previous_case.case_type.name,
+                case_visibility_new=case.visibility,
+                case_visibility_old=previous_case.visibility,
                 name=case.name,
                 ticket_weblink=case.ticket.weblink,
                 title=case.title,
@@ -286,6 +293,8 @@ def send_case_update_notifications(case: Case, previous_case: CaseRead, db_sessi
         "case_status_old": previous_case.status,
         "case_type_new": case.case_type.name,
         "case_type_old": previous_case.case_type.name,
+        "case_visibility_new": case.visibility,
+        "case_visibility_old": previous_case.visibility,
         "name": case.name,
         "organization_slug": case.project.organization.slug,
         "ticket_weblink": resolve_attr(case, "ticket.weblink"),

src/dispatch/messaging/strings.py

@@ -558,6 +558,11 @@ class MessageType(DispatchEnum):
     "\n", " "
 ).strip()
 
+CASE_VISIBILITY_CHANGE_DESCRIPTION = """
+The case visibility has been changed from {{ case_visibility_old }} to {{ case_visibility_new }}.""".replace(
+    "\n", " "
+).strip()
+
 CASE_STATUS_CHANGE = {
     "title": "Status Change",
     "text": CASE_STATUS_CHANGE_DESCRIPTION,
@@ -575,6 +580,11 @@ class MessageType(DispatchEnum):
     "text": CASE_PRIORITY_CHANGE_DESCRIPTION,
 }
 
+CASE_VISIBILITY_CHANGE = {
+    "title": "Visibility Change",
+    "text": CASE_VISIBILITY_CHANGE_DESCRIPTION,
+}
+
 INCIDENT_NAME = {
     "title": "{{name}} Incident Notification",
     "title_link": "{{ticket_weblink}}",