Renamed firebase provider file.

Author: digitalnomad91

src/notifications/firebase-admin.provider.ts

@@ -0,0 +1,72 @@
+import { Provider } from '@nestjs/common';
+import admin from 'firebase-admin';
+import fs from 'fs';
+import { ConfigService } from '../common/configs/config.service';
+
+export const FIREBASE_ADMIN = 'FIREBASE_ADMIN';
+
+/**
+ * Firebase Admin provider.
+ *
+ * Initialization strategy:
+ * 1. Prefer FIREBASE_SERVICE_ACCOUNT_KEY (stringified JSON) from env or ConfigService
+ * 2. Fallback to FIREBASE_SERVICE_ACCOUNT_PATH (path to JSON file)
+ * 3. If neither present, do not initialize and return the admin namespace (attempts to use it will fail with a clear log)
+ */
+export const FirebaseProvider: Provider = {
+  provide: FIREBASE_ADMIN,
+  useFactory: (configService: ConfigService) => {
+    // Prefer process.env values. If not present, attempt to read from ConfigService.getConfigs()
+    let envKey: string | undefined = process.env.FIREBASE_SERVICE_ACCOUNT_KEY;
+    let envPath: string | undefined = process.env.FIREBASE_SERVICE_ACCOUNT_PATH;
+
+    if ((!envKey || !envPath) && configService) {
+      const cfg = (configService as any).getConfigs?.() as Record<string, any> | undefined;
+      if (cfg) {
+        if (!envKey && typeof cfg.FIREBASE_SERVICE_ACCOUNT_KEY === 'string') {
+          envKey = cfg.FIREBASE_SERVICE_ACCOUNT_KEY;
+        }
+        if (!envPath && typeof cfg.FIREBASE_SERVICE_ACCOUNT_PATH === 'string') {
+          envPath = cfg.FIREBASE_SERVICE_ACCOUNT_PATH;
+        }
+      }
+    }
+
+    if (!admin.apps.length) {
+      let credentialObj: any = null;
+
+      if (envKey) {
+        try {
+          credentialObj = JSON.parse(envKey);
+        } catch (err) {
+          console.error('[FirebaseProvider] FIREBASE_SERVICE_ACCOUNT_KEY is not valid JSON', err);
+        }
+      } else if (envPath) {
+        try {
+          const file = fs.readFileSync(String(envPath), 'utf8');
+          credentialObj = JSON.parse(file);
+        } catch (err) {
+          console.error('[FirebaseProvider] Failed to read/parse service account at path:', String(envPath), err);
+        }
+      }
+
+      if (credentialObj) {
+        try {
+          admin.initializeApp({
+            credential: admin.credential.cert(credentialObj),
+          });
+          console.log('[FirebaseProvider] Initialized Firebase Admin SDK');
+        } catch (err) {
+          console.error('[FirebaseProvider] Failed to initialize Firebase Admin:', err);
+        }
+      } else {
+        console.warn(
+          '[FirebaseProvider] No Firebase service account provided (FIREBASE_SERVICE_ACCOUNT_KEY or FIREBASE_SERVICE_ACCOUNT_PATH). Firebase Admin not initialized. Calls to firebase services will fail.'
+        );
+      }
+    }
+
+    return admin;
+  },
+  inject: [ConfigService],
+};