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/reducers/statuses.js

@@ -0,0 +1,124 @@
+import {
+  REBLOG_REQUEST,
+  REBLOG_SUCCESS,
+  REBLOG_FAIL,
+  UNREBLOG_SUCCESS,
+  FAVOURITE_REQUEST,
+  FAVOURITE_SUCCESS,
+  FAVOURITE_FAIL,
+  UNFAVOURITE_SUCCESS
+} from '../actions/interactions';
+import {
+  STATUS_FETCH_SUCCESS,
+  CONTEXT_FETCH_SUCCESS
+} from '../actions/statuses';
+import {
+  TIMELINE_REFRESH_SUCCESS,
+  TIMELINE_UPDATE,
+  TIMELINE_DELETE,
+  TIMELINE_EXPAND_SUCCESS
+} from '../actions/timelines';
+import {
+  ACCOUNT_TIMELINE_FETCH_SUCCESS,
+  ACCOUNT_TIMELINE_EXPAND_SUCCESS,
+  ACCOUNT_BLOCK_SUCCESS
+} from '../actions/accounts';
+import {
+  NOTIFICATIONS_UPDATE,
+  NOTIFICATIONS_REFRESH_SUCCESS,
+  NOTIFICATIONS_EXPAND_SUCCESS
+} from '../actions/notifications';
+import {
+  FAVOURITED_STATUSES_FETCH_SUCCESS,
+  FAVOURITED_STATUSES_EXPAND_SUCCESS
+} from '../actions/favourites';
+import { SEARCH_FETCH_SUCCESS } from '../actions/search';
+import Immutable from 'immutable';
+
+const normalizeStatus = (state, status) => {
+  if (!status) {
+    return state;
+  }
+
+  const normalStatus   = { ...status };
+  normalStatus.account = status.account.id;
+
+  if (status.reblog && status.reblog.id) {
+    state               = normalizeStatus(state, status.reblog);
+    normalStatus.reblog = status.reblog.id;
+  }
+
+  const linebreakComplemented = status.content.replace(/<br \/>/g, '\n').replace(/<\/p><p>/g, '\n\n');
+  normalStatus.unescaped_content = new DOMParser().parseFromString(linebreakComplemented, 'text/html').documentElement.textContent;
+
+  return state.update(status.id, Immutable.Map(), map => map.mergeDeep(Immutable.fromJS(normalStatus)));
+};
+
+const normalizeStatuses = (state, statuses) => {
+  statuses.forEach(status => {
+    state = normalizeStatus(state, status);
+  });
+
+  return state;
+};
+
+const deleteStatus = (state, id, references) => {
+  references.forEach(ref => {
+    state = deleteStatus(state, ref[0], []);
+  });
+
+  return state.delete(id);
+};
+
+const filterStatuses = (state, relationship) => {
+  state.forEach(status => {
+    if (status.get('account') !== relationship.id) {
+      return;
+    }
+
+    state = deleteStatus(state, status.get('id'), state.filter(item => item.get('reblog') === status.get('id')));
+  });
+
+  return state;
+};
+
+const initialState = Immutable.Map();
+
+export default function statuses(state = initialState, action) {
+  switch(action.type) {
+  case TIMELINE_UPDATE:
+  case STATUS_FETCH_SUCCESS:
+  case NOTIFICATIONS_UPDATE:
+    return normalizeStatus(state, action.status);
+  case REBLOG_SUCCESS:
+  case UNREBLOG_SUCCESS:
+  case FAVOURITE_SUCCESS:
+  case UNFAVOURITE_SUCCESS:
+    return normalizeStatus(state, action.response);
+  case FAVOURITE_REQUEST:
+    return state.setIn([action.status.get('id'), 'favourited'], true);
+  case FAVOURITE_FAIL:
+    return state.setIn([action.status.get('id'), 'favourited'], false);
+  case REBLOG_REQUEST:
+    return state.setIn([action.status.get('id'), 'reblogged'], true);
+  case REBLOG_FAIL:
+    return state.setIn([action.status.get('id'), 'reblogged'], false);
+  case TIMELINE_REFRESH_SUCCESS:
+  case TIMELINE_EXPAND_SUCCESS:
+  case ACCOUNT_TIMELINE_FETCH_SUCCESS:
+  case ACCOUNT_TIMELINE_EXPAND_SUCCESS:
+  case CONTEXT_FETCH_SUCCESS:
+  case NOTIFICATIONS_REFRESH_SUCCESS:
+  case NOTIFICATIONS_EXPAND_SUCCESS:
+  case FAVOURITED_STATUSES_FETCH_SUCCESS:
+  case FAVOURITED_STATUSES_EXPAND_SUCCESS:
+  case SEARCH_FETCH_SUCCESS:
+    return normalizeStatuses(state, action.statuses);
+  case TIMELINE_DELETE:
+    return deleteStatus(state, action.id, action.references);
+  case ACCOUNT_BLOCK_SUCCESS:
+    return filterStatuses(state, action.relationship);
+  default:
+    return state;
+  }
+};