[FDC] Ask for region if app description is given

src/init/features/dataconnect/index.ts

@@ -40,6 +40,9 @@
 import { configstore } from "../../../configstore";
 import { trackGA4 } from "../../../track";
 
+// Default GCP region for Data Connect
+export const FDC_DEFAULT_REGION = "us-east4";
+
 const DATACONNECT_YAML_TEMPLATE = readTemplateSync("init/dataconnect/dataconnect.yaml");
 const CONNECTOR_YAML_TEMPLATE = readTemplateSync("init/dataconnect/connector.yaml");
 const SCHEMA_TEMPLATE = readTemplateSync("init/dataconnect/schema.gql");
@@ -94,7 +97,7 @@
 
 // askQuestions prompts the user about the Data Connect service they want to init. Any prompting
 // logic should live here, and _no_ actuation logic should live here.
 export async function askQuestions(setup: Setup): Promise<void> {
   const info: RequiredInfo = {
     analyticsFlow: "cli",
     appDescription: "",
@@ -125,6 +128,8 @@
     }
     if (hasBilling) {
       await promptForCloudSQL(setup, info);
+    } else if (info.appDescription) {
+      await promptForLocation(setup, info);
     }
   }
   setup.featureInfo = setup.featureInfo || {};
@@ -135,10 +140,10 @@
 
 // actuate writes product specific files and makes product specifc API calls.
 // It does not handle writing firebase.json and .firebaserc
 export async function actuate(setup: Setup, config: Config, options: any): Promise<void> {
   // Most users will want to persist data between emulator runs, so set this to a reasonable default.
   const dir: string = config.get("dataconnect.source", "dataconnect");
   const dataDir = config.get("emulators.dataconnect.dataDir", `${dir}/.dataconnect/pgliteData`);
   config.set("emulators.dataconnect.dataDir", dataDir);
 
   const info = setup.featureInfo?.dataconnect;
@@ -148,7 +153,7 @@
   // Populate the default values of required fields.
   info.serviceId = info.serviceId || defaultServiceId();
   info.cloudSqlInstanceId = info.cloudSqlInstanceId || `${info.serviceId.toLowerCase()}-fdc`;
-  info.locationId = info.locationId || `us-central1`;
+  info.locationId = info.locationId || FDC_DEFAULT_REGION;
   info.cloudSqlDatabase = info.cloudSqlDatabase || `fdcdb`;
 
   try {
@@ -166,7 +171,7 @@
     setup.instructions.push(
       `You can visualize the Data Connect Schema in Firebase Console:
 
     https://console.firebase.google.com/project/${setup.projectId!}/dataconnect/locations/${info.locationId}/services/${info.serviceId}/schema`,
     );
   }
   if (!setup.isBillingEnabled) {
@@ -181,7 +186,7 @@
   setup: Setup,
   config: Config,
   info: RequiredInfo,
   options: any,
 ): Promise<void> {
   const projectId = setup.projectId;
   if (!projectId) {
@@ -287,7 +292,7 @@
       { schemaGql: schemaFiles, connectors: connectors, seedDataGql: seedDataGql },
       options,
     );
   } catch (err: any) {
     logLabeledError("dataconnect", `Operation Generation failed...`);
     // GiF generate operation API has stability concerns.
     // Fallback to save only the generated schema.
@@ -361,9 +366,9 @@
   config: Config,
   info: RequiredInfo,
   serviceGql: ServiceGQL,
   options: any,
 ): Promise<void> {
   const dir: string = config.get("dataconnect.source") || "dataconnect";
   const subbedDataconnectYaml = subDataconnectYamlValues({
     ...info,
     connectorDirs: serviceGql.connectors.map((c) => c.path),
@@ -435,10 +440,10 @@
 }): string {
   const replacements: Record<string, string> = {
     serviceId: "__serviceId__",
+    locationId: "__location__",
     cloudSqlDatabase: "__cloudSqlDatabase__",
     cloudSqlInstanceId: "__cloudSqlInstanceId__",
     connectorDirs: "__connectorDirs__",
-    locationId: "__location__",
   };
   let replaced = DATACONNECT_YAML_TEMPLATE;
   for (const [k, v] of Object.entries(replacementValues)) {
@@ -614,12 +619,7 @@
   }
 
   if (info.locationId === "") {
-    const choices = await locationChoices(setup);
-    info.locationId = await select<string>({
-      message: "What location would like to use?",
-      choices,
-      default: "us-east4",
-    });
+    await promptForLocation(setup, info);
     info.shouldProvisionCSQL = await confirm({
       message: `Would you like to provision your Cloud SQL instance and database now?`,
       default: true,
@@ -642,6 +642,17 @@
   return;
 }
 
+async function promptForLocation(setup: Setup, info: RequiredInfo): Promise<void> {
+  if (info.locationId === "") {
+    const choices = await locationChoices(setup);
+    info.locationId = await select<string>({
+      message: "What location should the new Cloud SQL instance be in?",
+      choices,
+      default: FDC_DEFAULT_REGION,
+    });
+  }
+}
+
 async function locationChoices(setup: Setup) {
   if (setup.projectId) {
     const locations = await listLocations(setup.projectId);

src/mcp/tools/core/init.ts

@@ -12,6 +12,7 @@ import {
   validateAppExists,
 } from "../../../init/features/ailogic/utils";
 import { getFirebaseProject } from "../../../management/projects";
+import { FDC_DEFAULT_REGION } from "../../../init/features/dataconnect";
 
 export const init = tool(
   {
@@ -82,7 +83,7 @@ export const init = tool(
             location_id: z
               .string()
               .optional()
-              .default("us-central1")
+              .default(FDC_DEFAULT_REGION)
               .describe("The GCP region ID to set up the Firebase Data Connect service."),
             cloudsql_instance_id: z
               .string()