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

1 files changed, 30 insertions, 0 deletions

diff --git a/lib/ci/cron_parser.rb b/lib/ci/cron_parser.rb
new file mode 100644
index 00000000000..163cfc86aa7
--- /dev/null
+++ b/lib/ci/cron_parser.rb
@@ -0,0 +1,30 @@
+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