Add UI for creating polls (#10184)

* Add actions and reducers for polls

* Add poll button

* Disable media upload if poll enabled

* Add poll form

* Make delete & redraft work with polls

app/javascript/mastodon/features/compose/containers/poll_button_container.js

@@ -0,0 +1,24 @@
+import { connect } from 'react-redux';
+import PollButton from '../components/poll_button';
+import { addPoll, removePoll } from '../../../actions/compose';
+
+const mapStateToProps = state => ({
+  unavailable: state.getIn(['compose', 'is_uploading']) || (state.getIn(['compose', 'media_attachments']).size > 0),
+  active: state.getIn(['compose', 'poll']) !== null,
+});
+
+const mapDispatchToProps = dispatch => ({
+
+  onClick () {
+    dispatch((_, getState) => {
+      if (getState().getIn(['compose', 'poll'])) {
+        dispatch(removePoll());
+      } else {
+        dispatch(addPoll());
+      }
+    });
+  },
+
+});
+
+export default connect(mapStateToProps, mapDispatchToProps)(PollButton);

app/javascript/mastodon/features/compose/containers/poll_form_container.js

@@ -0,0 +1,29 @@
+import { connect } from 'react-redux';
+import PollForm from '../components/poll_form';
+import { addPollOption, removePollOption, changePollOption, changePollSettings } from '../../../actions/compose';
+
+const mapStateToProps = state => ({
+  options: state.getIn(['compose', 'poll', 'options']),
+  expiresIn: state.getIn(['compose', 'poll', 'expires_in']),
+  isMultiple: state.getIn(['compose', 'poll', 'multiple']),
+});
+
+const mapDispatchToProps = dispatch => ({
+  onAddOption(title) {
+    dispatch(addPollOption(title));
+  },
+
+  onRemoveOption(index) {
+    dispatch(removePollOption(index));
+  },
+
+  onChangeOption(index, title) {
+    dispatch(changePollOption(index, title));
+  },
+
+  onChangeSettings(expiresIn, isMultiple) {
+    dispatch(changePollSettings(expiresIn, isMultiple));
+  },
+});
+
+export default connect(mapStateToProps, mapDispatchToProps)(PollForm);

app/javascript/mastodon/features/compose/containers/upload_button_container.js

@@ -4,6 +4,7 @@ import { uploadCompose } from '../../../actions/compose';
 
 const mapStateToProps = state => ({
   disabled: state.getIn(['compose', 'is_uploading']) || (state.getIn(['compose', 'media_attachments']).size > 3 || state.getIn(['compose', 'media_attachments']).some(m => m.get('type') === 'video')),
+  unavailable: state.getIn(['compose', 'poll']) !== null,
   resetFileKey: state.getIn(['compose', 'resetFileKey']),
 });