feat(api): Add public API feature flag index endpoint

ref: #673 #663

app/devops/viewsets/feature_flag_endpoints.py

@@ -0,0 +1,63 @@
+from drf_spectacular.utils import extend_schema
+
+from rest_framework.response import Response
+from rest_framework.reverse import reverse
+
+from api.viewsets.common import IndexViewset
+
+from devops.models.software_enable_feature_flag import SoftwareEnableFeatureFlag
+
+
+
+@extend_schema(exclude = True)
+class Index(
+    IndexViewset
+):
+
+    allowed_methods: list = [
+        'GET',
+        'HEAD',
+        'OPTIONS'
+    ]
+
+    view_description = """Centurion ERP Available Feature Flag Endpoints.
+
+    <p>The below links are publicly available endpoints for the software feature
+    flagging feature.</p>
+    """
+
+    view_name = "Feature Flag Endpoints"
+
+
+    def list(self, request, *args, **kwargs):
+
+        items = SoftwareEnableFeatureFlag.objects.select_related(
+            'organization',
+            'software'
+        ).filter(
+            enabled = True
+        ).order_by('organization__name')
+
+
+        endpoints = {}
+
+        for item in items:
+
+            ref = str(item.organization.name) + '_' + str(item.software.name)
+
+            if endpoints.get(str(item.organization.name), None) is None:
+
+                endpoints[str(item.organization.name)] = {}
+
+            endpoints[str(item.organization.name)][str(item.software.name)] = reverse(
+                    'v2:public:devops:_public_api_v2_feature_flag-list',
+                    request=request,
+                    kwargs = {
+                        'organization_id': int(item.organization.id),
+                        'software_id': int(item.software.id)
+                    }
+                )
+
+        return Response(
+            endpoints
+        )