feat: facet course search results by title

Facet on the title of the program instead of the type of the program. ENT-4365

src/constants.js

@@ -1,5 +1,6 @@
 const FEATURE_ENROLL_WITH_CODES = 'ENROLL_WITH_CODES';
 const FEATURE_LANGUAGE_FACET = 'LANGUAGE_FACET';
+const FEATURE_PROGRAM_TITLES_FACET = 'PROGRAM_TITLES_FACET';
 
 const ENTERPRISE_ADMIN = 'enterprise_admin';
 const ENTERPRISE_CATALOG_ADMIN = 'enterprise_catalog_admin';
@@ -14,6 +15,7 @@ const STYLE_VARIANTS = {
 export {
   FEATURE_ENROLL_WITH_CODES,
   FEATURE_LANGUAGE_FACET,
+  FEATURE_PROGRAM_TITLES_FACET,
   ENTERPRISE_ADMIN,
   ENTERPRISE_CATALOG_ADMIN,
   ENTERPRISE_LEARNER,

src/course-search/config/index.js

@@ -3,6 +3,7 @@ import qs from 'query-string';
 import {
   FEATURE_ENROLL_WITH_CODES,
   FEATURE_LANGUAGE_FACET,
+  FEATURE_PROGRAM_TITLES_FACET,
 } from '../../constants';
 
 const hasFeatureFlagEnabled = (featureFlag) => {
@@ -13,6 +14,9 @@ const hasFeatureFlagEnabled = (featureFlag) => {
 const features = {
   ENROLL_WITH_CODES: process.env.FEATURE_ENROLL_WITH_CODES || hasFeatureFlagEnabled(FEATURE_ENROLL_WITH_CODES),
   LANGUAGE_FACET: process.env.FEATURE_LANGUAGE_FACET || hasFeatureFlagEnabled(FEATURE_LANGUAGE_FACET),
+  PROGRAM_TITLES_FACET: (
+    process.env.FEATURE_PROGRAM_TITLES_FACET || hasFeatureFlagEnabled(FEATURE_PROGRAM_TITLES_FACET)
+  ),
 };
 
 // eslint-disable-next-line import/prefer-default-export

src/course-search/data/constants.js

@@ -22,8 +22,9 @@ export const SEARCH_FACET_FILTERS = [
     isSortedAlphabetical: true,
   },
   {
-    attribute: 'programs',
+    attribute: (features.PROGRAM_TITLES_FACET ? 'program_titles' : 'programs'),
     title: 'Program',
+    isSortedAlphabetical: true,
   },
   {
     attribute: 'level_type',