FPA M0.5 Adds contentType to article query param.

src/runtime/entitlements-manager-test.js

@@ -437,6 +437,20 @@ describes.realWin('EntitlementsManager', (env) => {
       });
     });
 
+    it('adds content_type to query params when experiment is enabled', async () => {
+      it('should log error messages from entitlements server', async () => {
+        fetcherMock
+          .expects('fetch')
+          .withExactArgs(
+            'https://news.google.com/swg/_/api/v1/publication/pub1/entitlements',
+            {
+              method: 'GET',
+              headers: {'Accept': 'text/plain, application/json'},
+              credentials: 'include',
+            }
+          )
+    })
+
     it('should accept encrypted document key', async () => {
       fetcherMock
         .expects('fetch')

src/runtime/entitlements-manager.ts

@@ -41,6 +41,7 @@ import {
   GOOGLE_METERING_SOURCE,
   PRIVILEGED_SOURCE,
 } from '../api/entitlements';
+import {ArticleExperimentFlags} from './experiment-flags';
 import {Fetcher} from './fetcher';
 import {Intervention} from './intervention';
 import {InterventionType} from '../api/intervention-type';
@@ -823,6 +824,18 @@ export class EntitlementsManager {
     if (this.useArticleEndpoint_) {
       url = addQueryParam(url, 'locked', String(this.pageConfig_.isLocked()));
     }
+    const experimentFlags = await this.getExperimentConfigFlags();
+    if (
+      experimentFlags.includes(
+        ArticleExperimentFlags.CONTENT_TYPE_ARTICLE_PARAM_ENABLED
+      )
+    ) {
+      url = addQueryParam(
+        url,
+        'content_type',
+        getContentTypeParam(this.pageConfig_.isLocked())
+      );
+    }
     const hashedCanonicalUrl = await this.getHashedCanonicalUrl_();
 
     let encodableParams: GetEntitlementsParamsInternalDef | undefined = this
@@ -1019,3 +1032,10 @@ function irtpStringToBoolean(value: string | null): boolean | undefined {
       return undefined;
   }
 }
+
+/**
+ * Returns ContentType Enum string from isLocked page config status.
+ */
+function getContentTypeParam(isLocked: boolean) {
+  return isLocked ? 'CLOSED' : 'OPEN';
+}

src/runtime/experiment-flags.ts

@@ -54,4 +54,9 @@ export enum ArticleExperimentFlags {
    * Experiment flag to enable onsite preview.
    */
   ONSITE_PREVIEW_ENABLED = 'onsite_preview_enabled',
+
+  /**
+   * Experiment flag to enable the content type article param.
+   */
+  CONTENT_TYPE_ARTICLE_PARAM_ENABLED = 'content_type_article_param_enabled'
 }