Refactor dashboard data serialization and mock context for improved clarity

- Introduced `serialize_audit_for_response` and `serialize_current_cluster_for_template` functions to handle JSON serialization of audit and cluster data, enhancing data consistency for API responses and template rendering.
- Updated `get_mock_context` in `mock_data.py` to utilize the new serialization functions, simplifying the mock data structure and improving readability.
- Refactored `collect_context` and `collect_audits` in `views.py` to leverage the new serialization methods, ensuring a cleaner and more maintainable codebase.
- Added unit tests for the new serialization functions to ensure correctness and reliability of data formatting.

dashboard/views.py

@@ -1,5 +1,3 @@
-import json
-
 from django.conf import settings
 from django.core.cache import cache
 from django.http import JsonResponse
@@ -10,6 +8,10 @@ from dashboard.openstack_utils.audits import get_audits, get_current_cluster_cpu
 from dashboard.openstack_utils.connect import check_openstack, get_connection
 from dashboard.openstack_utils.flavor import get_flavor_list
 from dashboard.prometheus_utils.query import check_prometheus, fetch_dashboard_metrics
+from dashboard.serializers import (
+    serialize_audit_for_response,
+    serialize_current_cluster_for_template,
+)
 from dashboard.stats import (
     CACHE_KEY_AUDITS,
     CACHE_KEY_CURRENT_CLUSTER,
@@ -44,17 +46,9 @@ def collect_context():
     audits = get_audits(connection=connection)
     metrics = fetch_dashboard_metrics()
     context = build_stats(metrics, region_name, flavors)
-    context["audits"] = audits
+    context["audits"] = [serialize_audit_for_response(a) for a in audits]
     current_cluster = get_current_cluster_cpu(connection)
-    context["current_cluster"] = {
-        "host_labels": json.dumps(current_cluster["host_labels"]),
-        "cpu_current": json.dumps(current_cluster["cpu_current"]),
-    }
-    for audit in context["audits"]:
-        audit["migrations"] = json.dumps(audit["migrations"])
-        audit["host_labels"] = json.dumps(audit["host_labels"])
-        audit["cpu_current"] = json.dumps(audit["cpu_current"])
-        audit["cpu_projected"] = json.dumps(audit["cpu_projected"])
+    context["current_cluster"] = serialize_current_cluster_for_template(current_cluster)
     return context
 
 
@@ -71,12 +65,7 @@ def collect_audits():
     """Build audits list with serialized fields for frontend."""
     connection = get_connection()
     audits = get_audits(connection=connection)
-    for audit in audits:
-        audit["migrations"] = json.dumps(audit["migrations"])
-        audit["host_labels"] = json.dumps(audit["host_labels"])
-        audit["cpu_current"] = json.dumps(audit["cpu_current"])
-        audit["cpu_projected"] = json.dumps(audit["cpu_projected"])
-    return audits
+    return [serialize_audit_for_response(a) for a in audits]
 
 
 def _skeleton_context():