init commit

shared/apps-common/src/jet/prefetched-intents/get-prefetched-intents.ts

@@ -0,0 +1,58 @@
+import { getCookie } from '@amp/web-app-components/src/utils/cookie';
+import type { LoggerFactory } from '@amp/web-apps-logger';
+import { isSome } from '@amp/web-apps-utils';
+import { deserializeServerData, stableStringify } from './server-data';
+import { type PrefetchedIntent, isPrefetchedIntents } from './types';
+
+export function getPrefetchedIntents(
+    loggerFactory: LoggerFactory,
+    options?: { evenIfSignedIn?: boolean; featureKitItfe?: string },
+): Map<string, unknown> {
+    const logger = loggerFactory.loggerFor('getPrefetchedIntents');
+    const evenIfSignedIn = options?.evenIfSignedIn;
+    const itfe = options?.featureKitItfe;
+
+    const data = deserializeServerData();
+    if (!data || !isPrefetchedIntents(data)) {
+        return new Map();
+    }
+
+    // We avoid prefetched intents in two scenarios:
+    //
+    // Condition 1: User is signed in (and evenIfSignedIn is false)
+    // It's possible/likely that dispatching an intent when signed in behaves
+    // differently.
+    //
+    // Condition 2: ITFE is enabled in Feature Kit
+    // When ITFE is active, we discard prefetched intents so that media API
+    // calls are triggered in the browser, allowing Feature Kit to inject ITFE
+    // into those calls.
+    if ((!evenIfSignedIn && getCookie('media-user-token')) || itfe) {
+        logger.info(
+            'Discarding prefetched intents - signed in user or ITFE enabled',
+        );
+        return new Map();
+    }
+
+    logger.debug('received prefetched intents from the server:', data);
+    return new Map(
+        data
+            .map(
+                ({
+                    intent,
+                    data,
+                }: PrefetchedIntent): [string, unknown] | null => {
+                    try {
+                        if (intent.$kind.includes('Library')) {
+                            return null;
+                        }
+                        // NOTE: PrefetchedIntents.get depends on stableStringify
+                        return [stableStringify(intent), data];
+                    } catch (e) {
+                        return null;
+                    }
+                },
+            )
+            .filter(isSome),
+    );
+}