Signing endpoint: Firebase

lib/plugins/userIDB.mjs

@@ -29,7 +29,6 @@ export function userIDB(plugin, mapview) {
         })
 
         mapp.utils.userIndexedDB.put('locales', locale)
-
         alert(`User ${mapp.user.email} IndexedDB updated.`)
 
       }}>

mod/sign/_sign.js

@@ -9,15 +9,16 @@ The sign module provides access to different request signer methods.
 */
 
 const cloudinary = require('./cloudinary')
+const firebase = require('./firebase')
 
 const signerModules = {
-  cloudinary
+  cloudinary,
+  firebase
 }
 
-/**
+
 @function signer
 @async
-
 @description
 The signer method looks up a signerModules method matching the signer request parameter and passes the req/res objects as argument to the matched method.
 

mod/sign/firebase.js

@@ -0,0 +1,64 @@
+/**
+## /sign/firebase
+
+A module for producing signed urls for use with firebase object storage.
+
+@module /sign/firebase
+*/
+
+module.exports = async req => sign_firebase(req)
+
+/**
+@function sign_firebase
+
+@description Creates a signed url for object storage within firebase.
+
+@param {req} req.email - The users email address.
+@param {req} req.instance - The instance the user is on.
+@returns {Object} Object containing the signed url e.g {signedUrl: xxxxxx}
+*/
+async function sign_firebase(req) {
+
+  //Check for keys needed to make the request in the workspace
+  let firebase_keys = 'FIREBASE_AUTH_URL,FIREBASE_API_KEY,TRANSPORT_EMAIL,FIREBASE_PASSWORD,FIREBASE_DB_URL'
+
+  Object.keys(process.env).forEach(
+    element => {
+      if (firebase_keys.includes(element)) {
+
+        //If the key is found remove it from the list
+        firebase_keys = firebase_keys.replace(`,${element}`, '')
+        firebase_keys = firebase_keys.replace(`${element},`, '')
+        firebase_keys = firebase_keys.replace(element, '')
+      }
+    }
+  )
+
+  //Send missing keys if something is not available for the request
+  if (firebase_keys.length > 4) {
+    return { signedUrl: null, missing_keys: firebase_keys.split(',') }
+  }
+
+  let auth_url = `${process.env.FIREBASE_AUTH_URL}${process.env.FIREBASE_API_KEY}`
+  let email = process.env.TRANSPORT_EMAIL
+  let password = process.env.FIREBASE_PASSWORD
+
+  //Use the private key to determine whether its a dev or live instance
+  let environment = process.env.PRIVATE.includes('pg.a') ? 'live' : 'dev'
+
+  const response = await fetch(auth_url, {
+    method: 'POST',
+    body: JSON.stringify(
+      {
+        email: email,
+        password: password,
+        returnSecureToken: true
+      }),
+  });
+
+  const responseJSON = await response.json()
+
+  const url = `${process.env.FIREBASE_DB_URL}/${environment}_workspaces/${req.params.instance}/${req.params.email}.json?auth=${responseJSON.idToken}`
+
+  return { signedUrl: url }
+}