1 files changed, 49 insertions, 0 deletions
diff --git a/lib/ci/api/triggers.rb b/lib/ci/api/triggers.rb
new file mode 100644
index 00000000000..40907d6db54
--- /dev/null
+++ b/lib/ci/api/triggers.rb
@@ -0,0 +1,49 @@
+module Ci
+  module API
+    # Build Trigger API
+    class Triggers < Grape::API
+      resource :projects do
+        # Trigger a GitLab CI project build
+        #
+        # Parameters:
+        #   id (required) - The ID of a CI project
+        #   ref (required) - The name of project's branch or tag
+        #   token (required) - The uniq token of trigger
+        # Example Request:
+        #   POST /projects/:id/ref/:ref/trigger
+        post ":id/refs/:ref/trigger" do
+          required_attributes! [:token]
+
+          project = Ci::Project.find(params[:id])
+          trigger = Ci::Trigger.find_by_token(params[:token].to_s)
+          not_found! unless project && trigger
+          unauthorized! unless trigger.project == project
+
+          # validate variables
+          variables = params[:variables]
+          if variables
+            unless variables.is_a?(Hash)
+              render_api_error!('variables needs to be a hash', 400)
+            end
+
+            unless variables.all? { |key, value| key.is_a?(String) && value.is_a?(String) }
+              render_api_error!('variables needs to be a map of key-valued strings', 400)
+            end
+
+            # convert variables from Mash to Hash
+            variables = variables.to_h
+          end
+
+          # create request and trigger builds
+          trigger_request = Ci::CreateTriggerRequestService.new.execute(project, trigger, params[:ref].to_s, variables)
+          if trigger_request
+            present trigger_request, with: Entities::TriggerRequest
+          else
+            errors = 'No builds created'
+            render_api_error!(errors, 400)
+          end
+        end
+      end
+    end
+  end
+end