feat: orchestrate accountable Campaign work

src/govoplan_campaign/backend/routes/assignments.py

@@ -43,6 +43,13 @@ from govoplan_core.core.idm import (
     CAPABILITY_IDM_FUNCTION_ASSIGNMENTS,
     IdmFunctionAssignmentDirectory,
 )
+from govoplan_core.core.events import (
+    EventActorRef,
+    EventObjectRef,
+    EventTenantRef,
+    PlatformEvent,
+    emit_platform_event,
+)
 from govoplan_core.core.notifications import (
     NotificationDispatchRequest,
     notification_dispatch_provider,
@@ -127,7 +134,10 @@ def list_campaign_work_assignments(
     campaign = _get_campaign_for_principal(session, campaign_id, principal)
     _require_permission(principal, "campaigns:campaign:read")
     statuses = tuple(dict.fromkeys(item.strip() for item in assignment_status if item.strip()))
-    if any(item not in {"open", "in_progress", "completed", "cancelled"} for item in statuses):
+    if any(
+        item not in {"open", "in_progress", "completed", "rejected", "cancelled"}
+        for item in statuses
+    ):
         raise HTTPException(status_code=422, detail="Unsupported assignment status filter.")
     query = session.query(CampaignWorkAssignment).filter(
         CampaignWorkAssignment.tenant_id == principal.tenant_id,
@@ -288,12 +298,20 @@ def transition_campaign_work_assignment(
         if payload.action == "cancel":
             raise HTTPException(status_code=403, detail="Only an assignment manager may cancel work.")
     _require_revision(assignment, payload.expected_revision)
-    target_status = {"start": "in_progress", "complete": "completed", "cancel": "cancelled"}[payload.action]
+    target_status = {
+        "accept": "in_progress",
+        "start": "in_progress",
+        "complete": "completed",
+        "reject": "rejected",
+        "cancel": "cancelled",
+    }[payload.action]
     if assignment.status == target_status:
         return _assignment_response(assignment)
     allowed = {
+        "accept": {"open"},
         "start": {"open"},
         "complete": {"open", "in_progress"},
+        "reject": {"open", "in_progress"},
         "cancel": {"open", "in_progress"},
     }
     if assignment.status not in allowed[payload.action]:
@@ -306,7 +324,13 @@ def transition_campaign_work_assignment(
         session,
         assignment=assignment,
         principal=principal,
-        event_kind={"start": "started", "complete": "completed", "cancel": "cancelled"}[payload.action],
+        event_kind={
+            "accept": "accepted",
+            "start": "started",
+            "complete": "completed",
+            "reject": "rejected",
+            "cancel": "cancelled",
+        }[payload.action],
         details={"reason": payload.reason},
     )
     _notify_assignment(session, campaign=campaign, assignment=assignment, event_kind=payload.action)
@@ -697,6 +721,51 @@ def _record_event(
     )
     session.add(event)
     session.flush()
+    emit_platform_event(
+        session,
+        PlatformEvent(
+            type="campaign.work.changed",
+            module_id="campaigns",
+            event_id=event.id,
+            occurred_at=event.created_at,
+            correlation_id=assignment.orchestration_correlation_id,
+            causation_id=assignment.workflow_step_id,
+            actor=EventActorRef(
+                type="account",
+                id=principal.account_id,
+                label=_actor_label(principal),
+            ),
+            tenant=EventTenantRef(id=assignment.tenant_id),
+            subject=EventObjectRef(
+                type="campaign_work_assignment",
+                id=assignment.id,
+            ),
+            resource=EventObjectRef(
+                type="campaign",
+                id=assignment.campaign_id,
+            ),
+            classification="internal",
+            payload={
+                "campaign_id": assignment.campaign_id,
+                "campaign_version_id": assignment.campaign_version_id,
+                "assignment_id": assignment.id,
+                "assignment_revision": assignment.resource_revision,
+                "assignment_ref": (
+                    "campaign-work-assignment:"
+                    f"{assignment.id}:r{assignment.resource_revision}"
+                ),
+                "outcome": event_kind,
+                "status": assignment.status,
+                "assignee_type": assignment.assignee_type,
+                "assignee_id": assignment.assignee_id,
+                "action_url": (
+                    f"/campaigns/{assignment.campaign_id}/work"
+                    f"?assignment={assignment.id}"
+                ),
+            },
+        ),
+        registry=get_registry(),
+    )
     return event