Replace sprockets/browserify with Webpack (#2617)

* Replace browserify with webpack

* Add react-intl-translations-manager

* Do not minify in development, add offline-plugin for ServiceWorker background cache updates

* Adjust tests and dependencies

* Fix production deployments

* Fix tests

* More optimizations

* Improve travis cache for npm stuff

* Re-run travis

* Add back support for custom.scss as before

* Remove offline-plugin and babili

* Fix issue with Immutable.List().unshift(...values) not working as expected

* Make travis load schema instead of running all migrations in sequence

* Fix missing React import in WarningContainer. Optimize rendering performance by using ImmutablePureComponent instead of
React.PureComponent. ImmutablePureComponent uses Immutable.is() to compare props. Replace dynamic callback bindings in
<UI />

* Add react definitions to places that use JSX

* Add Procfile.dev for running rails, webpack and streaming API at the same time

app/javascript/mastodon/components/media_gallery.js

@@ -0,0 +1,196 @@
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import PropTypes from 'prop-types';
+import IconButton from './icon_button';
+import { defineMessages, injectIntl, FormattedMessage } from 'react-intl';
+import { isIOS } from '../is_mobile';
+
+const messages = defineMessages({
+  toggle_visible: { id: 'media_gallery.toggle_visible', defaultMessage: 'Toggle visibility' }
+});
+
+class Item extends React.PureComponent {
+  constructor (props, context) {
+    super(props, context);
+    this.handleClick = this.handleClick.bind(this);
+  }
+
+  handleClick (e) {
+    const { index, onClick } = this.props;
+
+    if (e.button === 0) {
+      e.preventDefault();
+      onClick(index);
+    }
+
+    e.stopPropagation();
+  }
+
+  render () {
+    const { attachment, index, size } = this.props;
+
+    let width  = 50;
+    let height = 100;
+    let top    = 'auto';
+    let left   = 'auto';
+    let bottom = 'auto';
+    let right  = 'auto';
+
+    if (size === 1) {
+      width = 100;
+    }
+
+    if (size === 4 || (size === 3 && index > 0)) {
+      height = 50;
+    }
+
+    if (size === 2) {
+      if (index === 0) {
+        right = '2px';
+      } else {
+        left = '2px';
+      }
+    } else if (size === 3) {
+      if (index === 0) {
+        right = '2px';
+      } else if (index > 0) {
+        left = '2px';
+      }
+
+      if (index === 1) {
+        bottom = '2px';
+      } else if (index > 1) {
+        top = '2px';
+      }
+    } else if (size === 4) {
+      if (index === 0 || index === 2) {
+        right = '2px';
+      }
+
+      if (index === 1 || index === 3) {
+        left = '2px';
+      }
+
+      if (index < 2) {
+        bottom = '2px';
+      } else {
+        top = '2px';
+      }
+    }
+
+    let thumbnail = '';
+
+    if (attachment.get('type') === 'image') {
+      thumbnail = (
+        <a
+          className='media-gallery__item-thumbnail'
+          href={attachment.get('remote_url') || attachment.get('url')}
+          onClick={this.handleClick}
+          target='_blank'
+          style={{ backgroundImage: `url(${attachment.get('preview_url')})` }}
+        />
+      );
+    } else if (attachment.get('type') === 'gifv') {
+      const autoPlay = !isIOS() && this.props.autoPlayGif;
+
+      thumbnail = (
+        <div className={`media-gallery__gifv ${autoPlay ? 'autoplay' : ''}`}>
+          <video
+            className='media-gallery__item-gifv-thumbnail'
+            role='application'
+            src={attachment.get('url')}
+            onClick={this.handleClick}
+            autoPlay={autoPlay}
+            loop={true}
+            muted={true}
+          />
+
+          <span className='media-gallery__gifv__label'>GIF</span>
+        </div>
+      );
+    }
+
+    return (
+      <div className='media-gallery__item' key={attachment.get('id')} style={{ left: left, top: top, right: right, bottom: bottom, width: `${width}%`, height: `${height}%` }}>
+        {thumbnail}
+      </div>
+    );
+  }
+
+}
+
+Item.propTypes = {
+  attachment: ImmutablePropTypes.map.isRequired,
+  index: PropTypes.number.isRequired,
+  size: PropTypes.number.isRequired,
+  onClick: PropTypes.func.isRequired,
+  autoPlayGif: PropTypes.bool.isRequired
+};
+
+class MediaGallery extends React.PureComponent {
+
+  constructor (props, context) {
+    super(props, context);
+    this.state = {
+      visible: !props.sensitive
+    };
+    this.handleOpen = this.handleOpen.bind(this);
+    this.handleClick = this.handleClick.bind(this);
+  }
+
+  handleOpen (e) {
+    this.setState({ visible: !this.state.visible });
+  }
+
+  handleClick (index) {
+    this.props.onOpenMedia(this.props.media, index);
+  }
+
+  render () {
+    const { media, intl, sensitive } = this.props;
+
+    let children;
+
+    if (!this.state.visible) {
+      let warning;
+
+      if (sensitive) {
+        warning = <FormattedMessage id='status.sensitive_warning' defaultMessage='Sensitive content' />;
+      } else {
+        warning = <FormattedMessage id='status.media_hidden' defaultMessage='Media hidden' />;
+      }
+
+      children = (
+        <div role='button' tabIndex='0' className='media-spoiler' onClick={this.handleOpen}>
+          <span className='media-spoiler__warning'>{warning}</span>
+          <span className='media-spoiler__trigger'><FormattedMessage id='status.sensitive_toggle' defaultMessage='Click to view' /></span>
+        </div>
+      );
+    } else {
+      const size = media.take(4).size;
+      children = media.take(4).map((attachment, i) => <Item key={attachment.get('id')} onClick={this.handleClick} attachment={attachment} autoPlayGif={this.props.autoPlayGif} index={i} size={size} />);
+    }
+
+    return (
+      <div className='media-gallery' style={{ height: `${this.props.height}px` }}>
+        <div className='spoiler-button' style={{ display: !this.state.visible ? 'none' : 'block' }}>
+          <IconButton title={intl.formatMessage(messages.toggle_visible)} icon={this.state.visible ? 'eye' : 'eye-slash'} overlay onClick={this.handleOpen} />
+        </div>
+
+        {children}
+      </div>
+    );
+  }
+
+}
+
+MediaGallery.propTypes = {
+  sensitive: PropTypes.bool,
+  media: ImmutablePropTypes.list.isRequired,
+  height: PropTypes.number.isRequired,
+  onOpenMedia: PropTypes.func.isRequired,
+  intl: PropTypes.object.isRequired,
+  autoPlayGif: PropTypes.bool.isRequired
+};
+
+export default injectIntl(MediaGallery);