[VS Code] Fix the no project emulator experience

firebase-vscode/src/data-connect/config.ts

@@ -305,27 +305,35 @@ export class ResolvedDataConnectConfig {
 export class ResolvedDataConnectConfigs {
   constructor(readonly values: DeepReadOnly<ResolvedDataConnectConfig[]>) {}
 
-  get serviceIds() {
+  get serviceIds(): string[] {
     return this.values.map((config) => config.value.serviceId);
   }
 
-  get allConnectors() {
+  get allConnectors(): ResolvedConnectorYaml[] {
     return this.values.flatMap((dc) => dc.resolvedConnectors);
   }
 
-  findById(serviceId: string) {
-    return this.values.find((dc) => dc.value.serviceId === serviceId);
+  findById(serviceId: string): ResolvedDataConnectConfig {
+    const dc = this.values.find((dc) => dc.value.serviceId === serviceId);
+    if (!dc) {
+      throw new Error(`No dataconnect.yaml with serviceId ${serviceId}. Available: ${this.serviceIds.join(", ")}`);
+    }
+    return dc;
   }
 
-  findEnclosingServiceForPath(filePath: string) {
-    return this.values.find((dc) => dc.containsPath(filePath));
+  findEnclosingServiceForPath(filePath: string): ResolvedDataConnectConfig {
+    const dc = this.values.find((dc) => dc.containsPath(filePath));
+    if (!dc) {
+      throw new Error(`No enclosing dataconnect.yaml found for path ${filePath}. Available Paths: ${this.values.map((dc) => dc.path).join(", ")}`);
+    }
+    return dc;
   }
 
-  getApiServicePathByPath(projectId: string, path: string) {
+  getApiServicePathByPath(projectId: string | undefined, path: string): string {
     const dataConnectConfig = this.findEnclosingServiceForPath(path);
     const serviceId = dataConnectConfig?.value.serviceId;
     const locationId = dataConnectConfig?.dataConnectLocation;
-    return `projects/${projectId}/locations/${locationId}/services/${serviceId}`;
+    return `projects/${projectId || "p"}/locations/${locationId}/services/${serviceId}`;
   }
 }
 

firebase-vscode/src/data-connect/service.ts

@@ -55,20 +55,14 @@ export class DataConnectService {
   async servicePath(path: string): Promise<string | undefined> {
     const dataConnectConfigsValue = await firstWhereDefined(dataConnectConfigs);
     // TODO: avoid calling this here and in getApiServicePathByPath
-    const serviceId =
-      dataConnectConfigsValue?.tryReadValue?.findEnclosingServiceForPath(path)
-        ?.value.serviceId;
-    const projectId = firebaseRC.value?.tryReadValue?.projects?.default;
-
-    if (serviceId === undefined || projectId === undefined) {
-      return undefined;
+    const dcs = dataConnectConfigsValue?.tryReadValue;
+    if (!dcs) {
+      throw new Error("cannot find dataconnect.yaml in the project");
     }
-
-    return (
-      dataConnectConfigsValue?.tryReadValue?.getApiServicePathByPath(
-        projectId,
+    return ( dcs?.getApiServicePathByPath(
+        firebaseRC.value?.tryReadValue?.projects?.default,
         path,
-      ) || `projects/p/locations/l/services/${serviceId}`
+      ) 
     );
   }