feat(firebase): add google signin (#548)

packages/cerebral-provider-firebase/src/factories/signInWithGoogle.js

@@ -0,0 +1,13 @@
+import {convertObjectWithTemplates} from './utils'
+
+function signInWithGoogleFactory (options = {}) {
+  function signInWithGoogle (context) {
+    return context.firebase.signInWithGoogle(convertObjectWithTemplates(options, context))
+      .then(context.path.success)
+      .catch(context.path.error)
+  }
+
+  return signInWithGoogle
+}
+
+export default signInWithGoogleFactory

packages/cerebral-provider-firebase/src/index.js

@@ -33,6 +33,7 @@ export {default as sendPasswordResetEmail} from './factories/sendPasswordResetEm
 export {default as signInAnonymously} from './factories/signInAnonymously'
 export {default as signInWithEmailAndPassword} from './factories/signInWithEmailAndPassword'
 export {default as signInWithFacebook} from './factories/signInWithFacebook'
+export {default as signInWithGoogle} from './factories/signInWithGoogle'
 export {default as signOut} from './factories/signOut'
 export {default as task} from './factories/task'
 export {default as value} from './factories/value'

packages/cerebral-provider-firebase/src/signInWithGoogle.js

@@ -0,0 +1,34 @@
+import firebase from 'firebase'
+import {createUser} from './helpers'
+
+export default function signInWithGoogle (options) {
+  const scopes = options.scopes || []
+  const redirect = options.redirect || false
+  const provider = new firebase.auth.GoogleAuthProvider()
+
+  scopes.forEach((scope) => {
+    provider.addScope(scope)
+  })
+
+  return new Promise((resolve, reject) => {
+    if (redirect) {
+      firebase.auth().signInWithRedirect(provider)
+      resolve()
+    } else {
+      firebase.auth().signInWithPopup(provider).then((result) => {
+        const user = createUser(result.user)
+
+        user.accessToken = result.credential.accessToken
+        resolve({
+          user: user
+        })
+      }).catch((error) => {
+        reject({
+          code: error.code,
+          message: error.message,
+          email: error.email
+        })
+      })
+    }
+  })
+}