1 files changed, 103 insertions, 0 deletions
diff --git a/src/config/rtcjs.ts b/src/config/rtcjs.ts
new file mode 100644
index 0000000..f9e8a67
--- /dev/null
+++ b/src/config/rtcjs.ts
@@ -0,0 +1,103 @@
+import { platform } from '@amp/web-apps-utils';
+import { HLSJS_CDN, HLSJS_VERSION } from './hlsjs';
+
+declare global {
+    interface Window {
+        rtc?: any;
+    }
+}
+
+export type ReportingOptions = {
+    storeBagURL: string;
+    clientName: string;
+    serviceName: string;
+    applicationName: string;
+    applicationVersion: string;
+    browserName: string;
+    browserMajorVersion: string;
+    browserMinorVersion: string;
+    osName: string;
+    osVersion: string;
+};
+
+/**
+ * Generate a URL for loading HLS.js.
+ */
+export function generateRTCJSURL(version?: string): URL {
+    // FIXME: Add a local storage override for the HLS.js version
+    version = version ?? HLSJS_VERSION;
+
+    return new URL(`${HLSJS_CDN}/${version}/rtc.js/rtc.js`);
+}
+
+export function getRTCNamespace() {
+    if (window.rtc === undefined) {
+        throw new Error('Unable to load RTC library');
+    }
+
+    return window.rtc;
+}
+
+export function getReportingOptions(): ReportingOptions {
+    // FIXME: Add correct information for RTC reporting for Web App Store
+    return {
+        storeBagURL:
+            'https://mediaservices.cdn-apple.com/store_bags/hlsjs/aasw/v1/rtc_storebag.json',
+
+        // Application
+        clientName: 'AASW',
+        serviceName: 'com.apple.apps.external',
+        applicationName: 'AppleAppStoreVWeb',
+        applicationVersion: 'WebAppStore/1.0.0',
+
+        // Browser
+        browserName: platform.clientName() ?? '',
+        browserMajorVersion: platform.majorVersion()?.toString() ?? '0',
+        browserMinorVersion: platform.minorVersion()?.toString() ?? '0',
+
+        // Operating System
+        osName: platform.osName() ?? '',
+        osVersion: platform.osName() ?? '',
+    } as const;
+}
+
+/**
+ * Generate the configuration used for an `RTCReportingAgent`.
+ *
+ * @see {@link makeReportingAgent}
+ */
+export function generateReportingConfig(rtc: any) {
+    rtc = rtc ?? getRTCNamespace();
+    const options = getReportingOptions();
+    const key = rtc.RTCReportingAgentConfigKeys;
+
+    return {
+        [key.Sender]: 'HLSJS',
+        [key.ClientName]: options.clientName,
+        [key.ServiceName]: options.serviceName,
+        [key.ApplicationName]: options.applicationName,
+        [key.DeviceName]: options.osVersion,
+        [key.ReportingStoreBag]: new rtc.RTCStorebag.RTCReportingStoreBag(
+            options.storeBagURL,
+            options.clientName,
+            options.serviceName,
+            options.applicationName,
+            options.browserName,
+            { iTunesAppVersion: options.applicationVersion },
+        ),
+
+        // Fake out these fields
+        model: options.browserName,
+        firmwareVersion: `${options.browserMajorVersion}.${options.browserMinorVersion}`,
+    };
+}
+
+/**
+ * Create an `RTCReportingAgent` with default configuration from `generateReportingConfig`.
+ *
+ * The reporting agent can be used with HLS.js playback to enable RTC reporting.
+ */
+export function makeReportingAgent(rtc: any): any {
+    rtc = rtc ?? getRTCNamespace();
+    return new rtc.RTCReportingAgent(generateReportingConfig(rtc));
+}