[WIP] feat: create a pass object for the google api (#5)

server/.gitignore

@@ -28,3 +28,6 @@ yarn-error.log*
 .env.development.local
 .env.test.local
 .env.production.local
+
+# Google service account key file
+key.json

server/pages/api/downloadPass.ts

@@ -1,5 +1,6 @@
 import { NextApiRequest, NextApiResponse } from "next"
-import { ApplePass } from "../../interfaces"
+import { ApplePass, Platform } from "../../interfaces"
+import { Passes } from "../../utils/Passes"
 
 // req = HTTP incoming message, res = HTTP server response
 export default function handler(req: NextApiRequest, res: NextApiResponse) {
@@ -27,7 +28,7 @@ export default function handler(req: NextApiRequest, res: NextApiResponse) {
     // TODO
 
     // Populate the pass template
-    // TODO
+    Passes.downloadPass(123456, Platform.Google)
 
     // Serve the pass download to the user
     // TODO

server/utils/GoogleAuthUtils.ts

@@ -3,11 +3,8 @@ const jwt = require('jsonwebtoken')
 
 export class GoogleAuthUtils {
 
-    static retrieveCredentials() {
-        console.log('retrieveCredentials')
-
-        // Path to service account key file obtained from Google CLoud Console.
-        const serviceAccountFile = process.env.GOOGLE_APPLICATION_CREDENTIALS || '/path/to/key.json'
+    static async createPassAndToken() {
+        console.log('createPassAndToken')
 
         // Issuer ID obtained from Google Pay Business Console.
         const issuerId = process.env.GOOGLE_WALLET_ISSUER_ID || '<issuer ID>'
@@ -21,8 +18,44 @@ export class GoogleAuthUtils {
         // ID for the wallet object, must be in the form `issuerId.userId` where userId is alphanumeric.
         const objectId = `${issuerId}.${userId.replace(/[^\w.-]/g, '_')}-${classId}`
 
-        const credentials = require(serviceAccountFile)
-
-        return credentials
-    }   
+        // The content of the service account key file obtained from Google Cloud Console.
+        const serviceAccountCredentialsBase64 = process.env.GOOGLE_APPLICATION_CREDENTIALS || 'Base64 encoded'
+        console.log('serviceAccountCredentialsBase64:\n', serviceAccountCredentialsBase64)
+
+        // Decode from Base64
+        const serviceAccountCredentials = Buffer.from(serviceAccountCredentialsBase64, "base64").toString()
+        console.log('serviceAccountCredentials:\n', serviceAccountCredentials)
+
+        // Convert service account credentials from string to JSON
+        // const serviceAccountCredentialsJSON = JSON.parse(serviceAccountCredentials)
+        const serviceAccountCredentialsFromFile = require('../key.json')
+        const serviceAccountCredentialsJSON = JSON.parse(serviceAccountCredentialsFromFile)
+        console.log('serviceAccountCredentialsJSON:\n', serviceAccountCredentialsJSON)
+
+        const httpClient = new GoogleAuth({
+            credentials: serviceAccountCredentialsJSON,
+            scopes: 'https://www.googleapis.com/auth/wallet_object.issuer'
+        })
+
+        const objectPayload = require('../../template-versions/google/1/generic-pass.json')
+        objectPayload.id = objectId
+        objectPayload.classId = classId
+        console.log('objectPayload:\n', objectPayload)
+
+        // Create a pass object
+        const objectUrl = 'https://walletobjects.googleapis.com/walletobjects/v1/genericObject/'
+        let objectResponse;
+        try {
+            objectResponse = await httpClient.request({url: objectUrl + objectPayload.id, method: 'GET'});
+            console.log('existing object', objectPayload.id);
+        } catch (err : any) {
+            if (err.response && (err.response.status === 404)) {
+                objectResponse = await httpClient.request({url: objectUrl, method: 'POST', data: objectPayload});
+                console.log('new object', objectPayload.id);
+            } else {
+                console.error(err);
+                throw err;
+            }
+        }
+    }
 }

server/utils/Passes.ts

@@ -1,4 +1,5 @@
 import { Platform } from "../interfaces"
+import { GoogleAuthUtils } from "./GoogleAuthUtils"
 
 export class Passes {
 
@@ -11,7 +12,13 @@ export class Passes {
         console.log('passportID:', passportID)
         console.log('platform:', platform)
 
-        // TODO
+        if (platform == Platform.Google) {
+            console.log('platform == Platform.Google')
+            GoogleAuthUtils.createPassAndToken()
+        } else if (platform == Platform.Apple) {
+            console.log('platform == Platform.Apple')
+            // TODO
+        }
     }
 
     /**