Add scheduled_trigger model. Add cron parser. Plus, specs.

app/models/ci/scheduled_trigger.rb

+module Ci
+  class ScheduledTrigger < ActiveRecord::Base
+    extend Ci::Model
+
+    acts_as_paranoid
+
+    belongs_to :project
+    belongs_to :owner, class_name: "User"
+
+    def schedule_next_run!
+      next_time = Ci::CronParser.new(cron, cron_time_zone).next_time_from_now
+      update(:next_run_at => next_time) if next_time.present?
+    end
+
+    def valid_ref?
+      true #TODO:
+    end
+
+    def update_last_run!
+      update(:last_run_at => Time.now)
+    end
+  end
+end

app/workers/scheduled_trigger_worker.rb

+class ScheduledTriggerWorker
+  include Sidekiq::Worker
+  include CronjobQueue
+
+  def perform
+    # TODO: Update next_run_at
+
+    Ci::ScheduledTriggers.where("next_run_at < ?", Time.now).find_each do |trigger|
+      begin
+        Ci::CreateTriggerRequestService.new.execute(trigger.project, trigger, trigger.ref)
+      rescue => e
+        Rails.logger.error "#{trigger.id}: Failed to trigger job: #{e.message}"
+      ensure
+        trigger.schedule_next_run!
+      end
+    end
+  end
+end

db/migrate/20170322070910_create_ci_scheduled_triggers.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class CreateCiScheduledTriggers < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  # DOWNTIME_REASON = ''
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def change
+    create_table :ci_scheduled_triggers do |t|
+      t.integer "project_id"
+      t.datetime "deleted_at"
+      t.datetime "created_at"
+      t.datetime "updated_at"
+      t.integer "owner_id"
+      t.string "description"
+      t.string "cron"
+      t.string "cron_time_zone"
+      t.datetime "next_run_at"
+      t.datetime "last_run_at"
+      t.string "ref"
+    end
+
+    add_index :ci_scheduled_triggers, ["next_run_at"], name: "index_ci_scheduled_triggers_on_next_run_at", using: :btree
+    add_index :ci_scheduled_triggers, ["project_id"], name: "index_ci_scheduled_triggers_on_project_id", using: :btree
+    add_foreign_key :ci_scheduled_triggers, :users, column: :owner_id, on_delete: :cascade
+  end
+end

db/schema.rb

@@ -61,7 +61,6 @@ ActiveRecord::Schema.define(version: 20170405080720) do
     t.boolean "shared_runners_enabled", default: true, null: false
     t.integer "max_artifacts_size", default: 100, null: false
     t.string "runners_registration_token"
-    t.integer "max_pages_size", default: 100, null: false
     t.boolean "require_two_factor_authentication", default: false
     t.integer "two_factor_grace_period", default: 48
     t.boolean "metrics_enabled", default: false
@@ -111,6 +110,7 @@ ActiveRecord::Schema.define(version: 20170405080720) do
     t.string "plantuml_url"
     t.boolean "plantuml_enabled"
     t.integer "terminal_max_session_time", default: 0, null: false
+    t.integer "max_pages_size", default: 100, null: false
     t.string "default_artifacts_expire_in", default: "0", null: false
     t.integer "unique_ips_limit_per_user"
     t.integer "unique_ips_limit_time_window"
@@ -290,6 +290,23 @@ ActiveRecord::Schema.define(version: 20170405080720) do
   add_index "ci_runners", ["locked"], name: "index_ci_runners_on_locked", using: :btree
   add_index "ci_runners", ["token"], name: "index_ci_runners_on_token", using: :btree
 
+  create_table "ci_scheduled_triggers", force: :cascade do |t|
+    t.integer "project_id"
+    t.datetime "deleted_at"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+    t.integer "owner_id"
+    t.string "description"
+    t.string "cron"
+    t.string "cron_time_zone"
+    t.datetime "next_run_at"
+    t.datetime "last_run_at"
+    t.string "ref"
+  end
+
+  add_index "ci_scheduled_triggers", ["next_run_at"], name: "index_ci_scheduled_triggers_on_next_run_at", using: :btree
+  add_index "ci_scheduled_triggers", ["project_id"], name: "index_ci_scheduled_triggers_on_project_id", using: :btree
+
   create_table "ci_trigger_requests", force: :cascade do |t|
     t.integer "trigger_id", null: false
     t.text "variables"
@@ -689,8 +706,8 @@ ActiveRecord::Schema.define(version: 20170405080720) do
     t.integer "visibility_level", default: 20, null: false
     t.boolean "request_access_enabled", default: false, null: false
     t.datetime "deleted_at"
-    t.text "description_html"
     t.boolean "lfs_enabled"
+    t.text "description_html"
     t.integer "parent_id"
   end
 
@@ -1242,8 +1259,8 @@ ActiveRecord::Schema.define(version: 20170405080720) do
     t.datetime "otp_grace_period_started_at"
     t.boolean "ldap_email", default: false, null: false
     t.boolean "external", default: false
-    t.string "incoming_email_token"
     t.string "organization"
+    t.string "incoming_email_token"
     t.boolean "authorized_projects_populated"
     t.boolean "ghost"
     t.boolean "notified_of_own_activity"
@@ -1298,6 +1315,7 @@ ActiveRecord::Schema.define(version: 20170405080720) do
 
   add_foreign_key "boards", "projects"
   add_foreign_key "chat_teams", "namespaces", on_delete: :cascade
+  add_foreign_key "ci_scheduled_triggers", "users", column: "owner_id", on_delete: :cascade
   add_foreign_key "ci_triggers", "users", column: "owner_id", name: "fk_e8e10d1964", on_delete: :cascade
   add_foreign_key "issue_metrics", "issues", on_delete: :cascade
   add_foreign_key "label_priorities", "labels", on_delete: :cascade

lib/ci/cron_parser.rb

+require 'rufus-scheduler' # Included in sidekiq-cron
+
+module Ci
+  class CronParser
+    def initialize(cron, cron_time_zone = 'UTC')
+      @cron = cron
+      @cron_time_zone = cron_time_zone
+    end
+
+    def next_time_from_now
+      cronLine = try_parse_cron
+      return nil unless cronLine.present?
+      cronLine.next_time
+    end
+
+    def valid_syntax?
+      try_parse_cron.present? ? true : false
+    end
+
+    private
+
+    def try_parse_cron
+      begin
+        Rufus::Scheduler.parse("#{@cron} #{@cron_time_zone}")
+      rescue
+        nil
+      end
+    end
+  end
+end

spec/factories/ci/scheduled_triggers.rb

+FactoryGirl.define do
+  factory :ci_scheduled_trigger, class: Ci::ScheduledTrigger do
+    project factory: :empty_project
+    owner factory: :user
+    ref 'master'
+
+    trait :cron_nightly_build do
+      cron '0 1 * * *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_weekly_build do
+      cron '0 1 * * 5'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_monthly_build do
+      cron '0 1 22 * *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_every_5_minutes do
+      cron '*/5 * * * *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_every_5_hours do
+      cron '* */5 * * *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_every_5_days do
+      cron '* * */5 * *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+
+    trait :cron_every_5_months do
+      cron '* * * */5 *'
+      cron_time_zone 'Europe/Istanbul'
+    end
+  end
+end

spec/lib/ci/cron_parser_spec.rb

+require 'spec_helper'
+
+module Ci
+  describe CronParser, lib: true do
+    describe '#next_time_from_now' do
+      subject { described_class.new(cron, cron_time_zone).next_time_from_now }
+
+      context 'when cron and cron_time_zone are valid' do
+        context 'at 00:00, 00:10, 00:20, 00:30, 00:40, 00:50' do
+          let(:cron) { '*/10 * * * *' }
+          let(:cron_time_zone) { 'US/Pacific' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            time = time + 10.minutes
+            time = time.change(sec: 0, min: time.min-time.min%10)
+            is_expected.to eq(time)
+          end
+        end
+
+        context 'at 10:00, 20:00' do
+          let(:cron) { '0 */10 * * *' }
+          let(:cron_time_zone) { 'US/Pacific' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            time = time + 10.hours
+            time = time.change(sec: 0, min: 0, hour: time.hour-time.hour%10)
+            is_expected.to eq(time)
+          end
+        end
+
+        context 'when cron is every 10 days' do
+          let(:cron) { '0 0 */10 * *' }
+          let(:cron_time_zone) { 'US/Pacific' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            time = time + 10.days
+            time = time.change(sec: 0, min: 0, hour: 0, day: time.day-time.day%10)
+            is_expected.to eq(time)
+          end
+        end
+
+        context 'when cron is every week 2:00 AM' do
+          let(:cron) { '0 2 * * *' }
+          let(:cron_time_zone) { 'US/Pacific' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            is_expected.to eq(time.change(sec: 0, min: 0, hour: 2, day: time.day+1))
+          end
+        end
+
+        context 'when cron_time_zone is US/Pacific' do
+          let(:cron) { '0 1 * * *' }
+          let(:cron_time_zone) { 'US/Pacific' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            is_expected.to eq(time.change(sec: 0, min: 0, hour: 1, day: time.day+1))
+          end
+        end
+
+        context 'when cron_time_zone is Europe/London' do
+          let(:cron) { '0 1 * * *' }
+          let(:cron_time_zone) { 'Europe/London' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            is_expected.to eq(time.change(sec: 0, min: 0, hour: 1, day: time.day+1))
+          end
+        end
+
+        context 'when cron_time_zone is Asia/Tokyo' do
+          let(:cron) { '0 1 * * *' }
+          let(:cron_time_zone) { 'Asia/Tokyo' }
+
+          it 'returns next time from now' do
+            time = Time.now.in_time_zone(cron_time_zone)
+            is_expected.to eq(time.change(sec: 0, min: 0, hour: 1, day: time.day+1))
+          end
+        end
+      end
+
+      context 'when cron is given and cron_time_zone is not given' do
+        let(:cron) { '0 1 * * *' }
+
+        it 'returns next time from now in utc' do
+          obj = described_class.new(cron).next_time_from_now
+          time = Time.now.in_time_zone('UTC')
+          expect(obj).to eq(time.change(sec: 0, min: 0, hour: 1, day: time.day+1))
+        end 
+      end
+
+      context 'when cron and cron_time_zone are invalid' do
+        let(:cron) { 'hack' }
+        let(:cron_time_zone) { 'hack' }
+
+        it 'returns nil' do
+          is_expected.to be_nil
+        end 
+      end
+    end
+
+    describe '#valid_syntax?' do
+      subject { described_class.new(cron, cron_time_zone).valid_syntax? }
+
+      context 'when cron and cron_time_zone are valid' do
+        let(:cron) { '* * * * *' }
+        let(:cron_time_zone) { 'Europe/Istanbul' }
+
+        it 'returns true' do
+          is_expected.to eq(true)
+        end 
+      end
+
+      context 'when cron and cron_time_zone are invalid' do
+        let(:cron) { 'hack' }
+        let(:cron_time_zone) { 'hack' }
+
+        it 'returns false' do
+          is_expected.to eq(false)
+        end 
+      end
+    end
+  end
+end

spec/models/ci/scheduled_trigger_spec.rb

+require 'spec_helper'
+require 'rufus-scheduler' # Included in sidekiq-cron
+
+describe Ci::ScheduledTrigger, models: true do
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:project) }
+    it { is_expected.to belong_to(:owner) }
+  end
+
+  describe '#schedule_next_run!' do
+    context 'when cron and cron_time_zone are vaild' do
+      context 'when nightly build' do
+        it 'schedules next run' do
+          scheduled_trigger = create(:ci_scheduled_trigger, :cron_nightly_build)
+          scheduled_trigger.schedule_next_run!
+          puts "scheduled_trigger: #{scheduled_trigger.inspect}"
+
+          expect(scheduled_trigger.cron).to be_nil
+        end
+      end
+
+      context 'when weekly build' do
+
+      end
+
+      context 'when monthly build' do
+
+      end
+    end
+
+    context 'when cron and cron_time_zone are invaild' do
+      it 'schedules nothing' do
+
+      end
+    end
+  end
+end

spec/workers/scheduled_trigger_worker_spec.rb

+require 'spec_helper'
+
+describe ScheduledTriggerWorker do
+  subject { described_class.new.perform }
+
+  context '#perform' do # TODO:
+    it 'does' do
+      is_expected.to be_nil
+    end
+  end
+end