Embed modal (#4748)

* Embed modal

* Proxy OEmbed requests from web UI

app/controllers/api/web/embeds_controller.rb

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class Api::Web::EmbedsController < Api::BaseController
+  respond_to :json
+
+  before_action :require_user!
+
+  def create
+    status = StatusFinder.new(params[:url]).status
+    render json: status, serializer: OEmbedSerializer, width: 400
+  rescue ActiveRecord::RecordNotFound
+    oembed = OEmbed::Providers.get(params[:url])
+    render json: Oj.dump(oembed.fields)
+  rescue OEmbed::NotFound
+    render json: {}, status: :not_found
+  end
+end

app/javascript/mastodon/features/status/components/action_bar.js

@@ -16,6 +16,7 @@ const messages = defineMessages({
   share: { id: 'status.share', defaultMessage: 'Share' },
   pin: { id: 'status.pin', defaultMessage: 'Pin on profile' },
   unpin: { id: 'status.unpin', defaultMessage: 'Unpin from profile' },
+  embed: { id: 'status.embed', defaultMessage: 'Embed' },
 });
 
 @injectIntl
@@ -34,6 +35,7 @@ export default class ActionBar extends React.PureComponent {
     onMention: PropTypes.func.isRequired,
     onReport: PropTypes.func,
     onPin: PropTypes.func,
+    onEmbed: PropTypes.func,
     me: PropTypes.number.isRequired,
     intl: PropTypes.object.isRequired,
   };
@@ -73,11 +75,17 @@ export default class ActionBar extends React.PureComponent {
     });
   }
 
+  handleEmbed = () => {
+    this.props.onEmbed(this.props.status);
+  }
+
   render () {
     const { status, me, intl } = this.props;
 
     let menu = [];
 
+    menu.push({ text: intl.formatMessage(messages.embed), action: this.handleEmbed });
+
     if (me === status.getIn(['account', 'id'])) {
       if (['public', 'unlisted'].indexOf(status.get('visibility')) !== -1) {
         menu.push({ text: intl.formatMessage(status.get('pinned') ? messages.unpin : messages.pin), action: this.handlePinClick });

app/javascript/mastodon/features/status/index.js

@@ -147,6 +147,10 @@ export default class Status extends ImmutablePureComponent {
     this.props.dispatch(initReport(status.get('account'), status));
   }
 
+  handleEmbed = (status) => {
+    this.props.dispatch(openModal('EMBED', { url: status.get('url') }));
+  }
+
   renderChildren (list) {
     return list.map(id => <StatusContainer key={id} id={id} />);
   }
@@ -198,6 +202,7 @@ export default class Status extends ImmutablePureComponent {
               onMention={this.handleMentionClick}
               onReport={this.handleReport}
               onPin={this.handlePin}
+              onEmbed={this.handleEmbed}
             />
 
             {descendants}

app/javascript/mastodon/features/ui/components/embed_modal.js

@@ -0,0 +1,84 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import ImmutablePureComponent from 'react-immutable-pure-component';
+import { FormattedMessage, injectIntl } from 'react-intl';
+import axios from 'axios';
+
+@injectIntl
+export default class EmbedModal extends ImmutablePureComponent {
+
+  static propTypes = {
+    url: PropTypes.string.isRequired,
+    onClose: PropTypes.func.isRequired,
+    intl: PropTypes.object.isRequired,
+  }
+
+  state = {
+    loading: false,
+    oembed: null,
+  };
+
+  componentDidMount () {
+    const { url } = this.props;
+
+    this.setState({ loading: true });
+
+    axios.post('/api/web/embed', { url }).then(res => {
+      this.setState({ loading: false, oembed: res.data });
+
+      const iframeDocument = this.iframe.contentWindow.document;
+
+      iframeDocument.open();
+      iframeDocument.write(res.data.html);
+      iframeDocument.close();
+
+      iframeDocument.body.style.margin = 0;
+      this.iframe.height = iframeDocument.body.scrollHeight + 'px';
+    });
+  }
+
+  setIframeRef = c =>  {
+    this.iframe = c;
+  }
+
+  handleTextareaClick = (e) => {
+    e.target.select();
+  }
+
+  render () {
+    const { oembed } = this.state;
+
+    return (
+      <div className='modal-root__modal embed-modal'>
+        <h4><FormattedMessage id='status.embed' defaultMessage='Embed' /></h4>
+
+        <div className='embed-modal__container'>
+          <p className='hint'>
+            <FormattedMessage id='embed.instructions' defaultMessage='Embed this status on your website by copying the code below.' />
+          </p>
+
+          <input
+            type='text'
+            className='embed-modal__html'
+            readOnly
+            value={oembed && oembed.html || ''}
+            onClick={this.handleTextareaClick}
+          />
+
+          <p className='hint'>
+            <FormattedMessage id='embed.preview' defaultMessage='Here is what it will look like:' />
+          </p>
+
+          <iframe
+            className='embed-modal__iframe'
+            scrolling='no'
+            frameBorder='0'
+            ref={this.setIframeRef}
+            title='preview'
+          />
+        </div>
+      </div>
+    );
+  }
+
+}

app/javascript/mastodon/features/ui/components/modal_root.js

@@ -13,6 +13,7 @@ import {
   BoostModal,
   ConfirmationModal,
   ReportModal,
+  EmbedModal,
 } from '../../../features/ui/util/async-components';
 
 const MODAL_COMPONENTS = {
@@ -23,6 +24,7 @@ const MODAL_COMPONENTS = {
   'CONFIRM': ConfirmationModal,
   'REPORT': ReportModal,
   'ACTIONS': () => Promise.resolve({ default: ActionsModal }),
+  'EMBED': EmbedModal,
 };
 
 export default class ModalRoot extends React.PureComponent {

app/javascript/mastodon/features/ui/util/async-components.js

@@ -109,3 +109,7 @@ export function MediaGallery () {
 export function VideoPlayer () {
   return import(/* webpackChunkName: "status/video_player" */'../../../components/video_player');
 }
+
+export function EmbedModal () {
+  return import(/* webpackChunkName: "modals/embed_modal" */'../components/embed_modal');
+}

app/javascript/packs/public.js

@@ -45,6 +45,10 @@ function main() {
         window.open(e.target.href, 'mastodon-intent', 'width=400,height=400,resizable=no,menubar=no,status=no,scrollbars=yes');
       });
     });
+
+    if (window.parent) {
+      window.parent.postMessage(['setHeight', document.getElementsByTagName('html')[0].scrollHeight], '*');
+    }
   });
 
   delegate(document, '.video-player video', 'click', ({ target }) => {

app/javascript/styles/components.scss

@@ -3099,7 +3099,8 @@ button.icon-button.active i.fa-retweet {
 }
 
 .onboarding-modal,
-.error-modal {
+.error-modal,
+.embed-modal {
   background: $ui-secondary-color;
   color: $ui-base-color;
   border-radius: 8px;
@@ -3951,3 +3952,61 @@ noscript {
     }
   }
 }
+
+.embed-modal__html {
+  color: $ui-secondary-color;
+  outline: 0;
+  box-sizing: border-box;
+  display: block;
+  width: 100%;
+  border: none;
+  padding: 10px;
+  font-family: 'mastodon-font-monospace', monospace;
+  background: $ui-base-color;
+  color: $ui-primary-color;
+  font-size: 14px;
+  margin: 0;
+  margin-bottom: 15px;
+
+  &::-moz-focus-inner {
+    border: 0;
+  }
+
+  &::-moz-focus-inner,
+  &:focus,
+  &:active {
+    outline: 0 !important;
+  }
+
+  &:focus {
+    background: lighten($ui-base-color, 4%);
+  }
+
+  @media screen and (max-width: 600px) {
+    font-size: 16px;
+  }
+}
+
+.embed-modal {
+  h4 {
+    padding: 30px;
+    font-weight: 500;
+    font-size: 16px;
+    text-align: center;
+  }
+
+  .hint {
+    margin-bottom: 15px;
+  }
+}
+
+.embed-modal__container {
+  padding: 10px;
+}
+
+.embed-modal__iframe {
+  width: 100%;
+  min-width: 400px;
+  overflow: hidden;
+  border: 0;
+}

app/serializers/oembed_serializer.rb

@@ -39,7 +39,7 @@ class OEmbedSerializer < ActiveModel::Serializer
   def html
     attributes = {
       src: embed_short_account_status_url(object.account, object),
-      style: 'width: 100%; overflow: hidden',
+      class: 'mastodon-embed',
       frameborder: '0',
       scrolling: 'no',
       width: width,

config/routes.rb

@@ -237,6 +237,7 @@ Rails.application.routes.draw do
 
     namespace :web do
       resource :settings, only: [:update]
+      resource :embed, only: [:create]
       resources :push_subscriptions, only: [:create] do
         member do
           put :update