Add form for scheduled trigger

app/controllers/projects/settings/ci_cd_controller.rb

@@ -27,6 +27,7 @@ module Projects
       def define_triggers_variables
         @triggers = @project.triggers
         @trigger = Ci::Trigger.new
+        @trigger.build_trigger_schedule
       end
       def define_badges_variables

app/controllers/projects/triggers_controller.rb

@@ -68,10 +68,16 @@ class Projects::TriggersController < Projects::ApplicationController
   end
   def create_params
-    params.require(:trigger).permit(:description)
+    params.require(:trigger).permit(
+      :description, :ref, :trigger_schedule_on,
+      trigger_schedule_attributes: [ :cron, :cron_timezone ]
+    )
   end
   def update_params
-    params.require(:trigger).permit(:description)
+    params.require(:trigger).permit(
+      :description, :ref, :trigger_schedule_on,
+      trigger_schedule_attributes: [ :cron, :cron_timezone ]
+    )
   end
 end

app/models/ci/trigger.rb

@@ -14,8 +14,21 @@ module Ci
     before_validation :set_default_values
+    accepts_nested_attributes_for :trigger_schedule
+
+    attr_accessor :trigger_schedule_on
+
     def set_default_values
       self.token = SecureRandom.hex(15) if self.token.blank?
+
+      if trigger_schedule_on.present?
+        if trigger_schedule_on.to_i == 1
+          self.trigger_schedule.project = project
+          self.trigger_schedule.trigger = self
+        else
+          self.trigger_schedule = nil
+        end
+      end
     end
     def last_trigger_request

app/models/ci/trigger_schedule.rb

@@ -8,7 +8,7 @@ module Ci
     belongs_to :project
     belongs_to :trigger
-    delegate :ref, to: :trigger
+    delegate :ref, to: :trigger, allow_nil: true
     validates :trigger, presence: { unless: :importing? }
     validates :cron, cron: true, presence: { unless: :importing? }
@@ -26,5 +26,11 @@ module Ci
     rescue ActiveRecord::RecordInvalid
       update_attribute(:next_run_at, nil) # update without validation
     end
+
+    def real_next_run(worker_cron: Settings.cron_jobs['trigger_schedule_worker']['cron'],
+                      worker_time_zone: Time.zone.name)
+      Gitlab::Ci::CronParser.new(worker_cron, worker_time_zone)
+                            .next_time_from(next_run_at)
+    end
   end
 end

app/views/projects/triggers/_form.html.haml

@@ -6,6 +6,27 @@
       %label.label-light Token
       %p.form-control-static= @trigger.token
   .form-group
-    = f.label :key, "Description", class: "label-light"
+    = f.label :key, "Description (For extenral trigger and scheduled trigger)", class: "label-light"
     = f.text_field :description, class: "form-control", required: true, title: 'Trigger description is required.', placeholder: "Trigger description"
+  = f.fields_for :trigger_schedule do |schedule_fields|
+    .form-group
+      = schedule_fields.label :cron, "Cron (For scheduled trigger)", class: "label-light"
+      = schedule_fields.text_field :cron, class: "form-control", title: 'Trigger Schedule cron is required.', placeholder: "0 1 * * *"
+    .form-group
+      = schedule_fields.label :cron_timezone, "Cron timezone (For scheduled trigger)", class: "label-light"
+      = schedule_fields.text_field :cron_timezone, class: "form-control", title: 'Trigger Schedule cron_timezone is required.', placeholder: "UTC"
+    .form-group
+      = f.label :ref, "Ref (For scheduled trigger)", class: "label-light"
+      = f.text_field :ref, class: "form-control", title: 'Trigger Schedule Ref is required.', placeholder: "master"
+  - if action_name == 'edit'
+    = f.hidden_field :trigger_schedule_on, :value => @trigger.trigger_schedule.present? ? 1 : 0
+  - else
+    .form-group
+      .checkbox
+        = f.label :trigger_schedule_on do
+          = f.check_box :trigger_schedule_on
+          %strong Register as scheduled trigger
+        .help-block
+          If checked, this trigger will be executed periodically according to `cron`, `cron_timezone` and `ref`
+          = link_to icon('question-circle'), help_page_path('user/project/pipelines/settings', anchor: 'visibility-of-pipelines')
   = f.submit btn_text, class: "btn btn-save"

app/views/projects/triggers/_index.html.haml

@@ -22,6 +22,8 @@
                 %th
                   %strong Last used
                 %th
+                  %strong Next run at
+                %th
               = render partial: 'projects/triggers/trigger', collection: @triggers, as: :trigger
         - else
           %p.settings-message.text-center.append-bottom-default

app/views/projects/triggers/_trigger.html.haml

@@ -29,6 +29,12 @@
     - else
       Never
+  %td
+    - if trigger.trigger_schedule.present?
+      = trigger.trigger_schedule.real_next_run
+    - else
+      N/A (External trigger)
+
   %td.text-right.trigger-actions
     - take_ownership_confirmation = "By taking ownership you will bind this trigger to your user account. With this the trigger will have access to all your projects as if it was you. Are you sure?"
     - revoke_trigger_confirmation = "By revoking a trigger you will break any processes making use of it. Are you sure?"