content: import React from 'react';
  import { connect } from 'react-redux';
  import ImmutablePropTypes from 'react-immutable-proptypes';
  import PropTypes from 'prop-types';
  import { lookupAccount, fetchAccount } from 'mastodon/actions/accounts';
  import { expandAccountMediaTimeline } from '../../actions/timelines';
  import LoadingIndicator from 'mastodon/components/loading_indicator';
  import Column from '../ui/components/column';
  import ColumnBackButton from 'mastodon/components/column_back_button';
  import ImmutablePureComponent from 'react-immutable-pure-component';
  import { getAccountGallery } from 'mastodon/selectors';
  import MediaItem from './components/media_item';
  import HeaderContainer from '../account_timeline/containers/header_container';
  import ScrollContainer from 'mastodon/containers/scroll_container';
  import LoadMore from 'mastodon/components/load_more';
  import MissingIndicator from 'mastodon/components/missing_indicator';
  import { openModal } from 'mastodon/actions/modal';
  import { FormattedMessage } from 'react-intl';
  
  const mapStateToProps = (state, { params: { acct, id } }) => {
    const accountId = id || state.getIn(['accounts_map', acct]);
  
    if (!accountId) {
      return {
        isLoading: true,
      };
    }
  
    return {
      accountId,
      isAccount: !!state.getIn(['accounts', accountId]),
      attachments: getAccountGallery(state, accountId),
      isLoading: state.getIn(['timelines', `account:${accountId}:media`, 'isLoading']),
      hasMore: state.getIn(['timelines', `account:${accountId}:media`, 'hasMore']),
      suspended: state.getIn(['accounts', accountId, 'suspended'], false),
      blockedBy: state.getIn(['relationships', accountId, 'blocked_by'], false),
    };
  };
  
  class LoadMoreMedia extends ImmutablePureComponent {
  
    static propTypes = {
      maxId: PropTypes.string,
      onLoadMore: PropTypes.func.isRequired,
    };
  
    handleLoadMore = () => {
      this.props.onLoadMore(this.props.maxId);
    }
  
    render () {
      return (
        <LoadMore
          disabled={this.props.disabled}
          onClick={this.handleLoadMore}
        />
      );
    }
  
  }
  
  export default @connect(mapStateToProps)
  class AccountGallery extends ImmutablePureComponent {
  
    static propTypes = {
      params: PropTypes.shape({
        acct: PropTypes.string,
        id: PropTypes.string,
      }).isRequired,
      accountId: PropTypes.string,
      dispatch: PropTypes.func.isRequired,
      attachments: ImmutablePropTypes.list.isRequired,
      isLoading: PropTypes.bool,
      hasMore: PropTypes.bool,
      isAccount: PropTypes.bool,
      blockedBy: PropTypes.bool,
      suspended: PropTypes.bool,
      multiColumn: PropTypes.bool,
    };
  
    state = {
      width: 323,
    };
  
    _load () {
      const { accountId, isAccount, dispatch } = this.props;
  
      if (!isAccount) dispatch(fetchAccount(accountId));
      dispatch(expandAccountMediaTimeline(accountId));
    }
  
    componentDidMount () {
      const { params: { acct }, accountId, dispatch } = this.props;
  
      if (accountId) {
        this._load();
      } else {
        dispatch(lookupAccount(acct));
      }
    }
  
    componentDidUpdate (prevProps) {
      const { params: { acct }, accountId, dispatch } = this.props;
  
      if (prevProps.accountId !== accountId && accountId) {
        this._load();
      } else if (prevProps.params.acct !== acct) {
        dispatch(lookupAccount(acct));
      }
    }
  
    handleScrollToBottom = () => {
      if (this.props.hasMore) {
        this.handleLoadMore(this.props.attachments.size > 0 ? this.props.attachments.last().getIn(['status', 'id']) : undefined);
      }
    }
  
    handleScroll = e => {
      const { scrollTop, scrollHeight, clientHeight } = e.target;
      const offset = scrollHeight - scrollTop - clientHeight;
  
      if (150 > offset && !this.props.isLoading) {
        this.handleScrollToBottom();
      }
    }
  
    handleLoadMore = maxId => {
      this.props.dispatch(expandAccountMediaTimeline(this.props.accountId, { maxId }));
    };
  
    handleLoadOlder = e => {
      e.preventDefault();
      this.handleScrollToBottom();
    }
  
    handleOpenMedia = attachment => {
      const { dispatch } = this.props;
      const statusId = attachment.getIn(['status', 'id']);
  
      if (attachment.get('type') === 'video') {
        dispatch(openModal('VIDEO', { media: attachment, statusId, options: { autoPlay: true } }));
      } else if (attachment.get('type') === 'audio') {
        dispatch(openModal('AUDIO', { media: attachment, statusId, options: { autoPlay: true } }));
      } else {
        const media = attachment.getIn(['status', 'media_attachments']);
        const index = media.findIndex(x => x.get('id') === attachment.get('id'));
  
        dispatch(openModal('MEDIA', { media, index, statusId }));
      }
    }
  
    handleRef = c => {
      if (c) {
        this.setState({ width: c.offsetWidth });
      }
    }
  
    render () {
      const { attachments, isLoading, hasMore, isAccount, multiColumn, blockedBy, suspended } = this.props;
      const { width } = this.state;
  
      if (!isAccount) {
        return (
          <Column>
            <MissingIndicator />
          </Column>
        );
      }
  
      if (!attachments && isLoading) {
        return (
          <Column>
            <LoadingIndicator />
          </Column>
        );
      }
  
      let loadOlder = null;
  
      if (hasMore && !(isLoading && attachments.size === 0)) {
        loadOlder = <LoadMore visible={!isLoading} onClick={this.handleLoadOlder} />;
      }
  
      let emptyMessage;
  
      if (suspended) {
        emptyMessage = <FormattedMessage id='empty_column.account_suspended' defaultMessage='Account suspended' />;
      } else if (blockedBy) {
        emptyMessage = <FormattedMessage id='empty_column.account_unavailable' defaultMessage='Profile unavailable' />;
      }
  
      return (
        <Column>
          <ColumnBackButton multiColumn={multiColumn} />
  
          <ScrollContainer scrollKey='account_gallery'>
            <div className='scrollable scrollable--flex' onScroll={this.handleScroll}>
              <HeaderContainer accountId={this.props.accountId} />
  
              {(suspended || blockedBy) ? (
                <div className='empty-column-indicator'>
                  {emptyMessage}
                </div>
              ) : (
                <div role='feed' className='account-gallery__container' ref={this.handleRef}>
                  {attachments.map((attachment, index) => attachment === null ? (
                    <LoadMoreMedia key={'more:' + attachments.getIn(index + 1, 'id')} maxId={index > 0 ? attachments.getIn(index - 1, 'id') : null} onLoadMore={this.handleLoadMore} />
                  ) : (
                    <MediaItem key={attachment.get('id')} attachment={attachment} displayWidth={width} onOpenMedia={this.handleOpenMedia} />
                  ))}
  
                  {loadOlder}
                </div>
              )}
  
              {isLoading && attachments.size === 0 && (
                <div className='scrollable__append'>
                  <LoadingIndicator />
                </div>
              )}
            </div>
          </ScrollContainer>
        </Column>
      );
    }
  
  }
  