firebase-admin.config.ts

import admin from "firebase-admin"

interface FirebaseAdminAppParams {
     projectId: string
     clientEmail: string
     storageBucket: string
     privateKey: string
}

function formatPrivateKey(key: string) {
     return key.replace(/\\n/g, "\n")
}

export function createFirebaseAdminApp(
     params: FirebaseAdminAppParams
) {
     const privateKey = formatPrivateKey(params.privateKey)

     if (admin.apps.length > 0) {
          return admin.app()
     }

     const cert = admin.credential.cert({
          projectId: params.projectId,
          clientEmail: params.clientEmail,
          privateKey,
     })

     return admin.initializeApp({
          credential: cert,
          projectId: params.projectId,
          storageBucket: params.storageBucket,
     })
}

export async function initAdmin() {
     const params = {
          projectId: process.env
               .NEXT_PUBLIC_FIREBASE_PROJECT_ID as string,
          clientEmail: process.env
               .FIREBASE_CLIENT_EMAIL as string,
          storageBucket: process.env
               .NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET as string,
          privateKey: process.env
               .FIREBASE_PRIVATE_KEY as string,
     }

     return createFirebaseAdminApp(params)
}