[FDC Metrics] Move the app detection into 4 counter labels

src/init/features/dataconnect/index.ts

@@ -170,6 +170,7 @@ export async function actuate(setup: Setup, config: Config, options: any): Promi
     await actuateWithInfo(setup, config, info, options);
     await sdk.actuate(setup, config);
   } finally {
+    const sdkInfo = setup.featureInfo?.dataconnectSdk;
     void trackGA4("dataconnect_init", {
       flow: info.analyticsFlow,
       project_status: setup.projectId
@@ -179,6 +180,7 @@ export async function actuate(setup: Setup, config: Config, options: any): Promi
             : "blaze"
           : "spark"
         : "missing",
+      ...(sdkInfo ? sdk.initAppCounters(sdkInfo) : {}),
     });
   }
 

src/init/features/dataconnect/sdk.ts

@@ -155,30 +155,42 @@ export async function chooseApp(): Promise<App[]> {
 }
 
 export async function actuate(setup: Setup, config: Config) {
-  const fdcInfo = setup.featureInfo?.dataconnect;
   const sdkInfo = setup.featureInfo?.dataconnectSdk;
   if (!sdkInfo) {
     throw new Error("Data Connect SDK feature RequiredInfo is not provided");
   }
   try {
     await actuateWithInfo(setup, config, sdkInfo);
   } finally {
-    let flow = "no_app";
-    if (sdkInfo.apps.length) {
-      const platforms = sdkInfo.apps.map((a) => a.platform.toLowerCase()).sort();
-      flow = `${platforms.join("_")}_app`;
-    }
-    if (fdcInfo) {
-      fdcInfo.analyticsFlow += `_${flow}`;
-    } else {
+    // If `firebase init dataconnect:sdk` is run alone, emit GA state.
+    const fdcInfo = setup.featureInfo?.dataconnect;
+    if (!fdcInfo) {
       void trackGA4("dataconnect_init", {
         project_status: setup.projectId ? (setup.isBillingEnabled ? "blaze" : "spark") : "missing",
-        flow: `cli_sdk_${flow}`,
+        flow: "cli_sdk",
+        ...initAppCounters(sdkInfo),
       });
     }
   }
 }
 
+export function initAppCounters(info: SdkRequiredInfo): { [key: string]: number } {
+  const platformCounts = (info.apps ?? []).reduce(
+    (acc, a) => {
+      const platform = a.platform.toLowerCase();
+      acc[platform] = (acc[platform] || 0) + 1;
+      return acc;
+    },
+    {} as Record<string, number>,
+  );
+  return {
+    num_web_apps: platformCounts[Platform.WEB.toLowerCase()] || 0,
+    num_android_apps: platformCounts[Platform.ANDROID.toLowerCase()] || 0,
+    num_ios_apps: platformCounts[Platform.IOS.toLowerCase()] || 0,
+    num_flutter_apps: platformCounts[Platform.FLUTTER.toLowerCase()] || 0,
+  };
+}
+
 async function actuateWithInfo(setup: Setup, config: Config, info: SdkRequiredInfo) {
   if (!info.apps.length) {
     // If no apps is specified, try to detect it again.