Add library to convert cron to human readable

- update policies list to convert cron to human readable

Changelog: added

EE: true

doc/topics/cron/index.md

@@ -65,5 +65,7 @@ More examples of how to write a cron schedule can be found at
 ## How GitLab parses cron syntax strings
 
 GitLab uses [`fugit`](https://github.com/floraison/fugit) to parse cron syntax
-strings on the server and [cron-validate](https://github.com/Airfooox/cron-validate)
-to validate cron syntax in the browser.
+strings on the server and [cron-validator](https://github.com/TheCloudConnectors/cron-validator)
+to validate cron syntax in the browser. GitLab uses 
+[`cRonstrue`](https://github.com/bradymholt/cRonstrue) to convert cron to human-readable strings
+in the browser.

ee/app/assets/javascripts/threat_monitoring/components/policy_editor/scan_execution_policy/lib/humanize.js

+import cronstrue from 'cronstrue';
 import { convertToTitleCase, humanize } from '~/lib/utils/text_utility';
 import { sprintf, s__, n__ } from '~/locale';
 import { NO_RULE_MESSAGE } from './constants';
@@ -33,7 +34,7 @@ const humanizeBranches = (originalBranches) => {
 };
 
 const humanizeCadence = (cadence) => {
-  return cadence;
+  return cronstrue.toString(cadence, { verbose: true }).toLowerCase();
 };
 
 const humanizePipelineRule = (rule) => {
@@ -44,10 +45,10 @@ const humanizePipelineRule = (rule) => {
 };
 
 const humanizeScheduleRule = (rule) => {
-  return sprintf(
-    s__('SecurityOrchestration|Scan to be performed every %{cadence} on the %{branches}'),
-    { cadence: humanizeCadence(rule.cadence), branches: humanizeBranches(rule.branches) },
-  );
+  return sprintf(s__('SecurityOrchestration|Scan to be performed %{cadence} on the %{branches}'), {
+    cadence: humanizeCadence(rule.cadence),
+    branches: humanizeBranches(rule.branches),
+  });
 };
 
 const HUMANIZE_RULES_METHODS = {

ee/spec/frontend/threat_monitoring/components/policy_editor/scan_execution_policy/lib/humanize_spec.js

@@ -44,13 +44,13 @@ describe('humanizeRules', () => {
 
   it('returns a single rule as a human-readable string', () => {
     expect(humanizeRules([mockRules[0]])).toStrictEqual([
-      'Scan to be performed every */10 * * * * on the main branch',
+      'Scan to be performed every 10 minutes, every hour, every day on the main branch',
     ]);
   });
 
   it('returns multiple rules with different number of branches as human-readable strings', () => {
     expect(humanizeRules(mockRules)).toStrictEqual([
-      'Scan to be performed every */10 * * * * on the main branch',
+      'Scan to be performed every 10 minutes, every hour, every day on the main branch',
       'Scan to be performed on every pipeline on the release/* and staging branches',
       'Scan to be performed on every pipeline on the release/1.*, canary and staging branches',
     ]);

locale/gitlab.pot

@@ -30804,7 +30804,7 @@ msgstr ""
 msgid "SecurityOrchestration|Scan execution policies can only be created by project owners."
 msgstr ""
 
-msgid "SecurityOrchestration|Scan to be performed every %{cadence} on the %{branches}"
+msgid "SecurityOrchestration|Scan to be performed %{cadence} on the %{branches}"
 msgstr ""
 
 msgid "SecurityOrchestration|Scan to be performed on every pipeline on the %{branches}"

package.json

@@ -117,6 +117,7 @@
     "copy-webpack-plugin": "^6.4.1",
     "core-js": "^3.18.2",
     "cron-validator": "^1.1.1",
+    "cronstrue": "^1.122.0",
     "cropper": "^2.3.0",
     "css-loader": "^2.1.1",
     "d3": "^5.16.0",

yarn.lock

@@ -3863,9 +3863,14 @@ create-require@^1.1.0:
   integrity sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==
 
 cron-validator@^1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/cron-validator/-/cron-validator-1.1.1.tgz#0a27bb75508c7bc03c8b840d2d9f170eeacb5615"
-  integrity sha512-vfZb05w/wezuwPZBDvdIBmJp2BvuJExHeyKRa5oBqD2ZDXR61hb3QgPc/3ZhBEQJlAy8Jlnn5XC/JCT3IDqxwg==
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/cron-validator/-/cron-validator-1.2.1.tgz#0f0de2de36d231a6ace0e43ffc6c0564fe6edf1a"
+  integrity sha512-RqdpGSokGFICPc8qAkT38aXqZLLanXghQTK2q7a2x2FabSwDd2ARrazd5ElEWAXzToUcMG4cZIwDH+5RM0q1mA==
+
+cronstrue@^1.122.0:
+  version "1.122.0"
+  resolved "https://registry.yarnpkg.com/cronstrue/-/cronstrue-1.122.0.tgz#bd6838077b476d28f61d381398b47b8c3912a126"
+  integrity sha512-PFuhZd+iPQQ0AWTXIEYX+t3nFGzBrWxmTWUKJOrsGRewaBSLKZ4I1f8s2kryU75nNxgyugZgiGh2OJsCTA/XlA==
 
 cropper@^2.3.0:
   version "2.3.0"