Add ability for triggers to be disabled

Will be used in the followup commit to automatically disable broken triggers

endpoints/api/trigger.py

@@ -22,7 +22,8 @@ from endpoints.api import (RepositoryParamResource, nickname, resource, require_
                            disallow_for_app_repositories)
 from endpoints.api.build import build_status_view, trigger_view, RepositoryBuildStatus
 from endpoints.api.trigger_analyzer import TriggerAnalyzer
-from endpoints.building import start_build, MaximumBuildsQueuedException
+from endpoints.building import (start_build, MaximumBuildsQueuedException,
+                                BuildTriggerDisabledException)
 from endpoints.exception import NotFound, Unauthorized, InvalidRequest
 from util.names import parse_robot_username
 
@@ -62,6 +63,21 @@ class BuildTriggerList(RepositoryParamResource):
 @path_param('trigger_uuid', 'The UUID of the build trigger')
 class BuildTrigger(RepositoryParamResource):
   """ Resource for managing specific build triggers. """
+  schemas = {
+    'UpdateTrigger': {
+      'type': 'object',
+      'description': 'Options for updating a build trigger',
+      'required': [
+        'enabled',
+      ],
+      'properties': {
+        'enabled': {
+          'type': 'boolean',
+          'description': 'Whether the build trigger is enabled',
+        },
+      }
+    },
+  }
 
   @require_repo_admin
   @disallow_for_app_repositories
@@ -70,6 +86,27 @@ class BuildTrigger(RepositoryParamResource):
     """ Get information for the specified build trigger. """
     return trigger_view(get_trigger(trigger_uuid), can_admin=True)
 
+  @require_repo_admin
+  @disallow_for_app_repositories
+  @nickname('updateBuildTrigger')
+  @validate_json_request('UpdateTrigger')
+  def put(self, namespace_name, repo_name, trigger_uuid):
+    """ Updates the specified build trigger. """
+    trigger = get_trigger(trigger_uuid)
+
+    handler = BuildTriggerHandler.get_handler(trigger)
+    if not handler.is_active():
+      raise InvalidRequest('Cannot update an unactivated trigger')
+
+    enable = request.get_json()['enabled']
+    model.build.toggle_build_trigger(trigger, enable)
+    log_action('toggle_repo_trigger', namespace_name,
+                {'repo': repo_name, 'trigger_id': trigger_uuid,
+                'service': trigger.service.name, 'enabled': enable},
+                repo=model.repository.get_repository(namespace_name, repo_name))
+                
+    return trigger_view(trigger)
+
   @require_repo_admin
   @disallow_for_app_repositories
   @nickname('deleteBuildTrigger')
@@ -340,6 +377,8 @@ class ActivateBuildTrigger(RepositoryParamResource):
   def post(self, namespace_name, repo_name, trigger_uuid):
     """ Manually start a build from the specified trigger. """
     trigger = get_trigger(trigger_uuid)
+    if not trigger.enabled:
+      raise InvalidRequest('Trigger is not enabled.')
 
     handler = BuildTriggerHandler.get_handler(trigger)
     if not handler.is_active():
@@ -356,6 +395,8 @@ class ActivateBuildTrigger(RepositoryParamResource):
       raise InvalidRequest(tse.message)
     except MaximumBuildsQueuedException:
       abort(429, message='Maximum queued build rate exceeded.')
+    except BuildTriggerDisabledException:
+      abort(400, message='Build trigger is disabled')
 
     resp = build_status_view(build_request)
     repo_string = '%s/%s' % (namespace_name, repo_name)
@@ -485,3 +526,4 @@ class BuildTriggerSourceNamespaces(RepositoryParamResource):
         raise InvalidRequest(rre.message)
     else:
       raise Unauthorized()
+