Add service permissions DAO and refactor user service permission mock

app/dao/service_permissions_dao.py

@@ -0,0 +1,41 @@
+from sqlalchemy import exc
+
+from app import db
+from app.dao.dao_utils import transactional
+from app.models import Service, ServicePermission, SERVICE_PERMISSION_TYPES
+
+
+def dao_fetch_service_permissions(service_id):
+    return ServicePermission.query.filter(
+        ServicePermission.service_id == service_id).all()
+
+
+def make_service_permissions_list(service_id, permissions):
+    arr = []
+    for permission in permissions:
+        if permission not in SERVICE_PERMISSION_TYPES:
+            raise ValueError("'{}' not of service permission type: {}".format(permission, SERVICE_PERMISSION_TYPES))
+
+        service_permission = ServicePermission(service_id=service_id, permission=permission)
+        arr.append(service_permission)
+
+    return arr
+
+
+@transactional
+def dao_add_and_commit_service_permissions(service_id, permissions):
+    service_permissions = make_service_permissions_list(service_id, permissions)
+
+    try:
+        db.session.add_all(service_permissions)
+        db.session.commit()
+    except exc.IntegrityError as e:
+        if "duplicate key value violates unique constraint" in str(e.orig):
+            raise ValueError(e.orig)
+        raise
+
+
+def dao_remove_service_permission(service_id, permission=None):
+    return ServicePermission.query.filter(
+        ServicePermission.service_id == service_id,
+        ServicePermission.permission == permission if permission else None).delete()