Re-activate registration, use oauth password flow to fetch token.

src/components/login_form/login_form.vue

@@ -7,7 +7,10 @@
     <div class="panel-body">
       <form v-on:submit.prevent='oAuthLogin'  class="login-form">
         <div class='form-group'>
-          <button class="btn btn-default">Login with OAuth</button>
+          <div class='login-bottom'>
+            <div><router-link :to="{name: 'registration'}" v-if='registrationOpen' class='register'>{{$t('login.register')}}</router-link></div>
+            <button :disabled="loggingIn" type='submit' class='btn btn-default'>{{$t('login.login')}}</button>
+          </div>
         </div>
       </form>
     </div>

src/components/registration/registration.js

@@ -1,3 +1,5 @@
+import oauthApi from '../../services/new_api/oauth.js'
+
 const registration = {
   data: () => ({
     user: {},
@@ -25,9 +27,22 @@ const registration = {
       this.$store.state.api.backendInteractor.register(this.user).then(
         (response) => {
           if (response.ok) {
-            this.$store.dispatch('loginUser', this.user)
-            this.$router.push('/main/all')
-            this.registering = false
+            const data = {
+              oauth: this.$store.state.oauth,
+              instance: this.$store.state.instance.server
+            }
+            oauthApi.getOrCreateApp(data).then((app) => {
+              oauthApi.getTokenWithCredentials(
+                {app,
+                 instance: data.instance,
+                 username: this.user.username,
+                 password: this.user.password})
+                .then((result) => {
+                  this.$store.commit('setToken', result.access_token)
+                  this.$store.dispatch('loginUser', result.access_token)
+                  this.$router.push('/main/friends')
+                })
+            })
           } else {
             this.registering = false
             response.json().then((data) => {

src/services/new_api/oauth.js

@@ -40,6 +40,22 @@ const login = (args) => {
   })
 }
 
+const getTokenWithCredentials = ({app, instance, username, password}) => {
+  const url = `${instance}/oauth/token`
+  const form = new window.FormData()
+
+  form.append('client_id', app.client_id)
+  form.append('client_secret', app.client_secret)
+  form.append('grant_type', 'password')
+  form.append('username', username)
+  form.append('password', password)
+
+  return window.fetch(url, {
+    method: 'POST',
+    body: form
+  }).then((data) => data.json())
+}
+
 const getToken = ({app, instance, code}) => {
   const url = `${instance}/oauth/token`
   const form = new window.FormData()
@@ -58,7 +74,9 @@ const getToken = ({app, instance, code}) => {
 
 const oauth = {
   login,
-  getToken
+  getToken,
+  getTokenWithCredentials,
+  getOrCreateApp
 }
 
 export default oauth