masto-fe-archos/app/javascript/mastodon/features/getting_started/containers/announcements_container.js

import { Map as ImmutableMap } from "immutable";
import { connect } from "react-redux";
import { createSelector } from "reselect";

import { addReaction, removeReaction, dismissAnnouncement } from "mastodon/actions/announcements";

import Announcements from "../components/announcements";

const customEmojiMap = createSelector([state => state.get("custom_emojis")], items => items.reduce((map, emoji) => map.set(emoji.get("shortcode"), emoji), ImmutableMap()));

const mapStateToProps = state => ({
  announcements: state.getIn(["announcements", "items"]),
  emojiMap: customEmojiMap(state),
});

const mapDispatchToProps = dispatch => ({
  dismissAnnouncement: id => dispatch(dismissAnnouncement(id)),
  addReaction: (id, name) => dispatch(addReaction(id, name)),
  removeReaction: (id, name) => dispatch(removeReaction(id, name)),
});

export default connect(mapStateToProps, mapDispatchToProps)(Announcements);