fedibird-fe/app/javascript/mastodon/actions/compose.js

import api from '../api';
import { CancelToken, isCancel } from 'axios';
import { throttle } from 'lodash';
import { search as emojiSearch } from '../features/emoji/emoji_mart_search_light';
import { tagHistory } from '../settings';
import { useEmoji } from './emojis';
import resizeImage from '../utils/resize_image';
import { importFetchedAccounts } from './importer';
import { updateTimeline } from './timelines';
import { getHomeVisibilities, getLimitedVisibilities } from 'mastodon/selectors';
import { showAlertForError } from './alerts';
import { showAlert } from './alerts';
import { openModal } from './modal';
import { defineMessages } from 'react-intl';
import { addYears, addMonths, addDays, addHours, addMinutes, addSeconds, millisecondsToSeconds, set, formatISO, format } from 'date-fns';
import { Set as ImmutableSet } from 'immutable';
import { postReferenceModal, enableFederatedTimeline, allowPollImage } from '../initial_state';
import { deleteScheduledStatus } from './scheduled_statuses';

let cancelFetchComposeSuggestionsAccounts, cancelFetchComposeSuggestionsTags;

export const COMPOSE_CHANGE          = 'COMPOSE_CHANGE';
export const COMPOSE_SUBMIT_REQUEST  = 'COMPOSE_SUBMIT_REQUEST';
export const COMPOSE_SUBMIT_SUCCESS  = 'COMPOSE_SUBMIT_SUCCESS';
export const COMPOSE_SUBMIT_FAIL     = 'COMPOSE_SUBMIT_FAIL';
export const COMPOSE_REPLY           = 'COMPOSE_REPLY';
export const COMPOSE_REPLY_CANCEL    = 'COMPOSE_REPLY_CANCEL';
export const COMPOSE_DIRECT          = 'COMPOSE_DIRECT';
export const COMPOSE_QUOTE           = 'COMPOSE_QUOTE';
export const COMPOSE_QUOTE_CANCEL    = 'COMPOSE_QUOTE_CANCEL';
export const COMPOSE_MENTION         = 'COMPOSE_MENTION';
export const COMPOSE_RESET           = 'COMPOSE_RESET';
export const COMPOSE_UPLOAD_REQUEST  = 'COMPOSE_UPLOAD_REQUEST';
export const COMPOSE_UPLOAD_SUCCESS  = 'COMPOSE_UPLOAD_SUCCESS';
export const COMPOSE_UPLOAD_FAIL     = 'COMPOSE_UPLOAD_FAIL';
export const COMPOSE_UPLOAD_PROGRESS = 'COMPOSE_UPLOAD_PROGRESS';
export const COMPOSE_UPLOAD_UNDO     = 'COMPOSE_UPLOAD_UNDO';

export const COMPOSE_SCHEDULED_EDIT_CANCEL = 'COMPOSE_SCHEDULED_EDIT_CANCEL';

export const SCHEDULED_STATUS_SUBMIT_SUCCESS = 'SCHEDULED_STATUS_SUBMIT_SUCCESS';

export const THUMBNAIL_UPLOAD_REQUEST  = 'THUMBNAIL_UPLOAD_REQUEST';
export const THUMBNAIL_UPLOAD_SUCCESS  = 'THUMBNAIL_UPLOAD_SUCCESS';
export const THUMBNAIL_UPLOAD_FAIL     = 'THUMBNAIL_UPLOAD_FAIL';
export const THUMBNAIL_UPLOAD_PROGRESS = 'THUMBNAIL_UPLOAD_PROGRESS';

export const COMPOSE_SUGGESTIONS_CLEAR      = 'COMPOSE_SUGGESTIONS_CLEAR';
export const COMPOSE_SUGGESTIONS_READY      = 'COMPOSE_SUGGESTIONS_READY';
export const COMPOSE_SUGGESTION_SELECT      = 'COMPOSE_SUGGESTION_SELECT';
export const COMPOSE_SUGGESTION_TAGS_UPDATE = 'COMPOSE_SUGGESTION_TAGS_UPDATE';

export const COMPOSE_TAG_HISTORY_UPDATE = 'COMPOSE_TAG_HISTORY_UPDATE';

export const COMPOSE_MOUNT   = 'COMPOSE_MOUNT';
export const COMPOSE_UNMOUNT = 'COMPOSE_UNMOUNT';

export const COMPOSE_SENSITIVITY_CHANGE   = 'COMPOSE_SENSITIVITY_CHANGE';
export const COMPOSE_SPOILERNESS_CHANGE   = 'COMPOSE_SPOILERNESS_CHANGE';
export const COMPOSE_SPOILER_TEXT_CHANGE  = 'COMPOSE_SPOILER_TEXT_CHANGE';
export const COMPOSE_VISIBILITY_CHANGE    = 'COMPOSE_VISIBILITY_CHANGE';
export const COMPOSE_SEARCHABILITY_CHANGE = 'COMPOSE_SEARCHABILITY_CHANGE';
export const COMPOSE_CIRCLE_CHANGE        = 'COMPOSE_CIRCLE_CHANGE';
export const COMPOSE_LISTABILITY_CHANGE   = 'COMPOSE_LISTABILITY_CHANGE';
export const COMPOSE_COMPOSING_CHANGE     = 'COMPOSE_COMPOSING_CHANGE';

export const COMPOSE_EMOJI_INSERT = 'COMPOSE_EMOJI_INSERT';

export const COMPOSE_UPLOAD_CHANGE_REQUEST = 'COMPOSE_UPLOAD_UPDATE_REQUEST';
export const COMPOSE_UPLOAD_CHANGE_SUCCESS = 'COMPOSE_UPLOAD_UPDATE_SUCCESS';
export const COMPOSE_UPLOAD_CHANGE_FAIL    = 'COMPOSE_UPLOAD_UPDATE_FAIL';

export const COMPOSE_POLL_ADD             = 'COMPOSE_POLL_ADD';
export const COMPOSE_POLL_REMOVE          = 'COMPOSE_POLL_REMOVE';
export const COMPOSE_POLL_OPTION_ADD      = 'COMPOSE_POLL_OPTION_ADD';
export const COMPOSE_POLL_OPTION_CHANGE   = 'COMPOSE_POLL_OPTION_CHANGE';
export const COMPOSE_POLL_OPTION_REMOVE   = 'COMPOSE_POLL_OPTION_REMOVE';
export const COMPOSE_POLL_SETTINGS_CHANGE = 'COMPOSE_POLL_SETTINGS_CHANGE';

export const INIT_MEDIA_EDIT_MODAL = 'INIT_MEDIA_EDIT_MODAL';

export const COMPOSE_CHANGE_MEDIA_DESCRIPTION = 'COMPOSE_CHANGE_MEDIA_DESCRIPTION';
export const COMPOSE_CHANGE_MEDIA_FOCUS       = 'COMPOSE_CHANGE_MEDIA_FOCUS';

export const COMPOSE_DATETIME_FORM_OPEN    = 'COMPOSE_DATETIME_FORM_OPEN';
export const COMPOSE_DATETIME_FORM_CLOSE   = 'COMPOSE_DATETIME_FORM_CLOSE';
export const COMPOSE_SCHEDULED_CHANGE      = 'COMPOSE_SCHEDULED_CHANGE';
export const COMPOSE_EXPIRES_CHANGE        = 'COMPOSE_EXPIRES_CHANGE';
export const COMPOSE_EXPIRES_ACTION_CHANGE = 'COMPOSE_EXPIRES_ACTION_CHANGE';

export const COMPOSE_REFERENCE_ADD    = 'COMPOSE_REFERENCE_ADD';
export const COMPOSE_REFERENCE_REMOVE = 'COMPOSE_REFERENCE_REMOVE';
export const COMPOSE_REFERENCE_RESET  = 'COMPOSE_REFERENCE_RESET';

const messages = defineMessages({
  uploadErrorLimit: { id: 'upload_error.limit', defaultMessage: 'File upload limit exceeded.' },
  uploadErrorPoll:  { id: 'upload_error.poll', defaultMessage: 'File upload not allowed with polls.' },
  postReferenceMessage:  { id: 'confirmations.post_reference.message', defaultMessage: 'It contains references, do you want to post it?' },
  postReferenceConfirm:  { id: 'confirmations.post_reference.confirm', defaultMessage: 'Post' },
});

const COMPOSE_PANEL_BREAKPOINT = 600 + (285 * 1) + (10 * 1);

export const ensureComposeIsVisible = (getState, routerHistory) => {
  if (!getState().getIn(['compose', 'mounted']) && window.innerWidth < COMPOSE_PANEL_BREAKPOINT) {
    routerHistory.push('/statuses/new');
  }
};

export const getContextReference = (getState, status) => {
  if (!status) {
    return ImmutableSet();
  }

  const references = status.get('status_reference_ids').toSet();
  const replyStatus = status.get('in_reply_to_id') ? getState().getIn(['statuses', status.get('in_reply_to_id')]) : null;
  return references.concat(getContextReference(getState, replyStatus));
};

export function changeCompose(text) {
  return {
    type: COMPOSE_CHANGE,
    text: text,
  };
};

export function replyCompose(status, routerHistory) {
  return (dispatch, getState) => {
    dispatch({
      type: COMPOSE_REPLY,
      status: status,
      context_references: getContextReference(getState, status),
    });

    ensureComposeIsVisible(getState, routerHistory);
  };
};

export function cancelReplyCompose() {
  return {
    type: COMPOSE_REPLY_CANCEL,
  };
};

export function quoteCompose(status, routerHistory) {
  return (dispatch, getState) => {
    dispatch({
      type: COMPOSE_QUOTE,
      status: status,
    });

    ensureComposeIsVisible(getState, routerHistory);
  };
};

export function cancelQuoteCompose() {
  return {
    type: COMPOSE_QUOTE_CANCEL,
  };
};

export function resetCompose() {
  return {
    type: COMPOSE_RESET,
  };
};

export function mentionCompose(account, routerHistory) {
  return (dispatch, getState) => {
    dispatch({
      type: COMPOSE_MENTION,
      account: account,
    });

    ensureComposeIsVisible(getState, routerHistory);
  };
};

export function directCompose(account, routerHistory) {
  return (dispatch, getState) => {
    dispatch({
      type: COMPOSE_DIRECT,
      account: account,
    });

    ensureComposeIsVisible(getState, routerHistory);
  };
};

export function cancelScheduledStatusCompose() {
  return {
    type: COMPOSE_SCHEDULED_EDIT_CANCEL,
  };
};

const parseSimpleDurationFormat = (value, origin = new Date()) => {
  if (!value || typeof value !== 'string') {
    return null;
  }

  const [, year = 0, month = 0, day = 0, hour = 0, minute = 0] = value.match(/^(?:(\d+)y)?(?:(\d+)m(?=[\do])o?)?(?:(\d+)d)?(?:(\d+)h)?(?:(\d+)m)?$/) ?? [];
  const duration = millisecondsToSeconds(addMinutes(addHours(addDays(addMonths(addYears(origin, year), month), day), hour), minute) - origin);

  return duration === 0 ? null : duration;
};

export const getDateTimeFromText = (value, origin = new Date()) => {
  const duration = parseSimpleDurationFormat(value, origin);
  const datetime = (() => {
    if (duration) {
      return addSeconds(origin, duration);
    }

    if (typeof value !== 'string') {
      return value;
    }

    if (value.length >= 7) {
      const isoDateTime = new Date(value);

      if (isoDateTime.toString() === 'Invalid Date') {
        return null;
      } else {
        return isoDateTime;
      }
    }

    return null;
  })();

  return {
    in: duration,
    at: datetime,
  };
};

export function submitComposeWithCheck(routerHistory, intl) {
  return function (dispatch, getState) {
    const status = getState().getIn(['compose', 'text'], '');
    const media  = getState().getIn(['compose', 'media_attachments']);
    const statusReferenceIds = getState().getIn(['compose', 'references']);

    if ((!status || !status.length) && media.size === 0) {
      return;
    }

    if (postReferenceModal && !statusReferenceIds.isEmpty()) {
      dispatch(openModal('CONFIRM', {
        message: intl.formatMessage(messages.postReferenceMessage),
        confirm: intl.formatMessage(messages.postReferenceConfirm),
        onConfirm: () => dispatch(submitCompose(routerHistory)),
      }));
    } else {
      dispatch(submitCompose(routerHistory));
    }
  };
};

export function submitCompose(routerHistory) {
  return function (dispatch, getState) {
    const status = getState().getIn(['compose', 'text'], '');
    const media  = getState().getIn(['compose', 'media_attachments']);
    const homeVisibilities = getHomeVisibilities(getState());
    const limitedVisibilities = getLimitedVisibilities(getState());
    const { in: scheduled_in = null, at: scheduled_at = null } = getDateTimeFromText(getState().getIn(['compose', 'scheduled']), new Date());
    const { in: expires_in = null, at: expires_at = null } = getDateTimeFromText(getState().getIn(['compose', 'expires']), scheduled_at ?? new Date());
    const expires_action = getState().getIn(['compose', 'expires_action']);
    const statusReferenceIds = getState().getIn(['compose', 'references']);
    const scheduled_status_id = getState().getIn(['compose', 'scheduled_status_id']);

    if ((!status || !status.length) && media.size === 0) {
      return;
    }

    dispatch(submitComposeRequest());

    api(getState).post('/api/v1/statuses', {
      status,
      in_reply_to_id: getState().getIn(['compose', 'in_reply_to'], null),
      media_ids: media.map(item => item.get('id')),
      sensitive: getState().getIn(['compose', 'sensitive']),
      spoiler_text: getState().getIn(['compose', 'spoiler']) ? getState().getIn(['compose', 'spoiler_text'], '') : '',
      visibility: getState().getIn(['compose', 'privacy']),
      circle_id: getState().getIn(['compose', 'circle_id']),
      poll: getState().getIn(['compose', 'poll'], null),
      quote_id: getState().getIn(['compose', 'quote_from'], null),
      scheduled_at: !scheduled_in && scheduled_at ? formatISO(set(scheduled_at, { seconds: 0 })) : null,
      scheduled_in: scheduled_in,
      expires_at: !expires_in && expires_at ? formatISO(set(expires_at, { seconds: 59 })) : null,
      expires_in: expires_in,
      expires_action: expires_action,
      status_reference_ids: statusReferenceIds,
      searchability: getState().getIn(['compose', 'searchability']),
    }, {
      headers: {
        'Idempotency-Key': getState().getIn(['compose', 'idempotencyKey']),
      },
    }).then(function (response) {
      if (response.data.scheduled_at !== null && response.data.scheduled_at !== undefined) {
        dispatch(submitScheduledStatusSuccess({ ...response.data }));
        if (scheduled_status_id) {
          dispatch(deleteScheduledStatus(scheduled_status_id));
        }
        routerHistory.push('/scheduled_statuses');
        return;
      } else if (routerHistory && routerHistory.location.pathname === '/statuses/new' && window.history.state) {
        routerHistory.goBack();
      }

      dispatch(insertIntoTagHistory(response.data.tags, status));
      dispatch(submitComposeSuccess({ ...response.data }));

      // To make the app more responsive, immediately push the status
      // into the columns
      const insertIfOnline = timelineId => {
        const timeline = getState().getIn(['timelines', timelineId]);

        if (timeline && timeline.get('items').size > 0 && timeline.getIn(['items', 0]) !== null && timeline.get('online')) {
          dispatch(updateTimeline(timelineId, { ...response.data }));
        }
      };

      if (homeVisibilities.length || homeVisibilities.includes(response.data.visibility)) {
        insertIfOnline('home');
      }

      if (limitedVisibilities.includes(response.data.visibility)) {
        insertIfOnline('limited');
      }

      if (['personal'].includes(response.data.visibility)) {
        insertIfOnline('personal');
      }

      if (response.data.in_reply_to_id === null && response.data.visibility === 'public') {
        if (enableFederatedTimeline) {
          insertIfOnline('public');
        }
        insertIfOnline(`account:${response.data.account.id}`);
      }
    }).catch(function (error) {
      dispatch(submitComposeFail(error));
    });
  };
};

export function submitComposeRequest() {
  return {
    type: COMPOSE_SUBMIT_REQUEST,
  };
};

export function submitComposeSuccess(status) {
  return {
    type: COMPOSE_SUBMIT_SUCCESS,
    status: status,
  };
};

export function submitComposeFail(error) {
  return {
    type: COMPOSE_SUBMIT_FAIL,
    error: error,
  };
};

export function submitScheduledStatusSuccess(status) {
  return {
    type: SCHEDULED_STATUS_SUBMIT_SUCCESS,
    scheduled_status: status,
  };
};

export function uploadCompose(files) {
  return function (dispatch, getState) {
    const uploadLimit = 4;
    const media  = getState().getIn(['compose', 'media_attachments']);
    const pending  = getState().getIn(['compose', 'pending_media_attachments']);
    const progress = new Array(files.length).fill(0);
    let total = Array.from(files).reduce((a, v) => a + v.size, 0);

    if (files.length + media.size + pending > uploadLimit) {
      dispatch(showAlert(undefined, messages.uploadErrorLimit));
      return;
    }

    if (!allowPollImage && getState().getIn(['compose', 'poll'])) {
      dispatch(showAlert(undefined, messages.uploadErrorPoll));
      return;
    }

    dispatch(uploadComposeRequest());

    for (const [i, f] of Array.from(files).entries()) {
      if (media.size + i > 3) break;

      resizeImage(f).then(file => {
        const data = new FormData();
        data.append('file', file);
        // Account for disparity in size of original image and resized data
        total += file.size - f.size;

        return api(getState).post('/api/v2/media', data, {
          onUploadProgress: function({ loaded }){
            progress[i] = loaded;
            dispatch(uploadComposeProgress(progress.reduce((a, v) => a + v, 0), total));
          },
        }).then(({ status, data }) => {
          // If server-side processing of the media attachment has not completed yet,
          // poll the server until it is, before showing the media attachment as uploaded

          if (status === 200) {
            dispatch(uploadComposeSuccess(data, f));
          } else if (status === 202) {
            const poll = () => {
              api(getState).get(`/api/v1/media/${data.id}`).then(response => {
                if (response.status === 200) {
                  dispatch(uploadComposeSuccess(response.data, f));
                } else if (response.status === 206) {
                  setTimeout(() => poll(), 1000);
                }
              }).catch(error => dispatch(uploadComposeFail(error)));
            };

            poll();
          }
        });
      }).catch(error => dispatch(uploadComposeFail(error)));
    };
  };
};

export const uploadThumbnail = (id, file) => (dispatch, getState) => {
  dispatch(uploadThumbnailRequest());

  const total = file.size;
  const data = new FormData();

  data.append('thumbnail', file);

  api(getState).put(`/api/v1/media/${id}`, data, {
    onUploadProgress: ({ loaded }) => {
      dispatch(uploadThumbnailProgress(loaded, total));
    },
  }).then(({ data }) => {
    dispatch(uploadThumbnailSuccess(data));
  }).catch(error => {
    dispatch(uploadThumbnailFail(id, error));
  });
};

export const uploadThumbnailRequest = () => ({
  type: THUMBNAIL_UPLOAD_REQUEST,
  skipLoading: true,
});

export const uploadThumbnailProgress = (loaded, total) => ({
  type: THUMBNAIL_UPLOAD_PROGRESS,
  loaded,
  total,
  skipLoading: true,
});

export const uploadThumbnailSuccess = media => ({
  type: THUMBNAIL_UPLOAD_SUCCESS,
  media,
  skipLoading: true,
});

export const uploadThumbnailFail = error => ({
  type: THUMBNAIL_UPLOAD_FAIL,
  error,
  skipLoading: true,
});

export function initMediaEditModal(id) {
  return dispatch => {
    dispatch({
      type: INIT_MEDIA_EDIT_MODAL,
      id,
    });

    dispatch(openModal('FOCAL_POINT', { id }));
  };
};

export function onChangeMediaDescription(description) {
  return {
    type: COMPOSE_CHANGE_MEDIA_DESCRIPTION,
    description,
  };
};

export function onChangeMediaFocus(focusX, focusY) {
  return {
    type: COMPOSE_CHANGE_MEDIA_FOCUS,
    focusX,
    focusY,
  };
};

export function changeUploadCompose(id, params) {
  return (dispatch, getState) => {
    dispatch(changeUploadComposeRequest());

    api(getState).put(`/api/v1/media/${id}`, params).then(response => {
      dispatch(changeUploadComposeSuccess(response.data));
    }).catch(error => {
      dispatch(changeUploadComposeFail(id, error));
    });
  };
};

export function changeUploadComposeRequest() {
  return {
    type: COMPOSE_UPLOAD_CHANGE_REQUEST,
    skipLoading: true,
  };
};

export function changeUploadComposeSuccess(media) {
  return {
    type: COMPOSE_UPLOAD_CHANGE_SUCCESS,
    media: media,
    skipLoading: true,
  };
};

export function changeUploadComposeFail(error) {
  return {
    type: COMPOSE_UPLOAD_CHANGE_FAIL,
    error: error,
    skipLoading: true,
  };
};

export function uploadComposeRequest() {
  return {
    type: COMPOSE_UPLOAD_REQUEST,
    skipLoading: true,
  };
};

export function uploadComposeProgress(loaded, total) {
  return {
    type: COMPOSE_UPLOAD_PROGRESS,
    loaded: loaded,
    total: total,
  };
};

export function uploadComposeSuccess(media, file) {
  return {
    type: COMPOSE_UPLOAD_SUCCESS,
    media: media,
    file: file,
    skipLoading: true,
  };
};

export function uploadComposeFail(error) {
  return {
    type: COMPOSE_UPLOAD_FAIL,
    error: error,
    skipLoading: true,
  };
};

export function undoUploadCompose(media_id) {
  return {
    type: COMPOSE_UPLOAD_UNDO,
    media_id: media_id,
  };
};

export function clearComposeSuggestions() {
  if (cancelFetchComposeSuggestionsAccounts) {
    cancelFetchComposeSuggestionsAccounts();
  }
  return {
    type: COMPOSE_SUGGESTIONS_CLEAR,
  };
};

const fetchComposeSuggestionsAccounts = throttle((dispatch, getState, token) => {
  if (cancelFetchComposeSuggestionsAccounts) {
    cancelFetchComposeSuggestionsAccounts();
  }

  api(getState).get('/api/v1/accounts/search', {
    cancelToken: new CancelToken(cancel => {
      cancelFetchComposeSuggestionsAccounts = cancel;
    }),

    params: {
      q: token.replace(/^@@?/, ''),
      resolve: false,
      limit: 4,
      following: token.startsWith('@@'),
      group_only: token.startsWith('@@'),
    },
  }).then(response => {
    dispatch(importFetchedAccounts(response.data));
    dispatch(readyComposeSuggestionsAccounts(token, response.data));
  }).catch(error => {
    if (!isCancel(error)) {
      dispatch(showAlertForError(error));
    }
  });
}, 200, { leading: true, trailing: true });

const fetchComposeSuggestionsEmojis = (dispatch, getState, token) => {
  const results = emojiSearch(token.replace(':', ''), { maxResults: 5 });
  dispatch(readyComposeSuggestionsEmojis(token, results));
};

const fetchComposeSuggestionsTags = throttle((dispatch, getState, token) => {
  if (cancelFetchComposeSuggestionsTags) {
    cancelFetchComposeSuggestionsTags();
  }

  dispatch(updateSuggestionTags(token));

  api(getState).get('/api/v2/search', {
    cancelToken: new CancelToken(cancel => {
      cancelFetchComposeSuggestionsTags = cancel;
    }),

    params: {
      type: 'hashtags',
      q: token.slice(1),
      resolve: false,
      limit: 4,
      exclude_unreviewed: true,
    },
  }).then(({ data }) => {
    dispatch(readyComposeSuggestionsTags(token, data.hashtags));
  }).catch(error => {
    if (!isCancel(error)) {
      dispatch(showAlertForError(error));
    }
  });
}, 200, { leading: true, trailing: true });

export function fetchComposeSuggestions(token) {
  return (dispatch, getState) => {
    switch (token[0]) {
    case ':':
      fetchComposeSuggestionsEmojis(dispatch, getState, token);
      break;
    case '#':
      fetchComposeSuggestionsTags(dispatch, getState, token);
      break;
    default:
      fetchComposeSuggestionsAccounts(dispatch, getState, token);
      break;
    }
  };
};

export function readyComposeSuggestionsEmojis(token, emojis) {
  return {
    type: COMPOSE_SUGGESTIONS_READY,
    token,
    emojis,
  };
};

export function readyComposeSuggestionsAccounts(token, accounts) {
  return {
    type: COMPOSE_SUGGESTIONS_READY,
    token,
    accounts,
  };
};

export const readyComposeSuggestionsTags = (token, tags) => ({
  type: COMPOSE_SUGGESTIONS_READY,
  token,
  tags,
});

export function selectComposeSuggestion(position, token, suggestion, path) {
  return (dispatch, getState) => {
    let completion, startPosition;

    if (suggestion.type === 'emoji') {
      completion    = suggestion.native || suggestion.colons;
      startPosition = position - 1;

      dispatch(useEmoji(suggestion));
    } else if (suggestion.type === 'hashtag') {
      completion    = `#${suggestion.name}`;
      startPosition = position - 1;
    } else if (suggestion.type === 'account') {
      completion    = getState().getIn(['accounts', suggestion.id, 'acct']);
      startPosition = position;
    }

    dispatch({
      type: COMPOSE_SUGGESTION_SELECT,
      position: startPosition,
      token,
      completion,
      path,
    });
  };
};

export function updateSuggestionTags(token) {
  return {
    type: COMPOSE_SUGGESTION_TAGS_UPDATE,
    token,
  };
}

export function updateTagHistory(tags) {
  return {
    type: COMPOSE_TAG_HISTORY_UPDATE,
    tags,
  };
}

export function hydrateCompose() {
  return (dispatch, getState) => {
    const me = getState().getIn(['meta', 'me']);
    const history = tagHistory.get(me);

    if (history !== null) {
      dispatch(updateTagHistory(history));
    }
  };
}

function insertIntoTagHistory(recognizedTags, text) {
  return (dispatch, getState) => {
    const state = getState();
    const oldHistory = state.getIn(['compose', 'tagHistory']);
    const me = state.getIn(['meta', 'me']);
    const names = recognizedTags.map(tag => text.match(new RegExp(`#${tag.name}`, 'i'))[0].slice(1));
    const intersectedOldHistory = oldHistory.filter(name => names.findIndex(newName => newName.toLowerCase() === name.toLowerCase()) === -1);

    names.push(...intersectedOldHistory.toJS());

    const newHistory = names.slice(0, 1000);

    tagHistory.set(me, newHistory);
    dispatch(updateTagHistory(newHistory));
  };
}

export function mountCompose() {
  return {
    type: COMPOSE_MOUNT,
  };
};

export function unmountCompose() {
  return {
    type: COMPOSE_UNMOUNT,
  };
};

export function changeComposeSensitivity() {
  return {
    type: COMPOSE_SENSITIVITY_CHANGE,
  };
};

export function changeComposeSpoilerness() {
  return {
    type: COMPOSE_SPOILERNESS_CHANGE,
  };
};

export function changeComposeSpoilerText(text) {
  return {
    type: COMPOSE_SPOILER_TEXT_CHANGE,
    text,
  };
};

export function changeComposeVisibility(value) {
  return {
    type: COMPOSE_VISIBILITY_CHANGE,
    value,
  };
};

export function changeComposeSearchability(value) {
  return {
    type: COMPOSE_SEARCHABILITY_CHANGE,
    value,
  };
};

export function changeComposeCircle(value) {
  return {
    type: COMPOSE_CIRCLE_CHANGE,
    value,
  };
};

export function insertEmojiCompose(position, emoji, needsSpace) {
  return {
    type: COMPOSE_EMOJI_INSERT,
    position,
    emoji,
    needsSpace,
  };
};

export function changeComposing(value) {
  return {
    type: COMPOSE_COMPOSING_CHANGE,
    value,
  };
};

export function addPoll() {
  return {
    type: COMPOSE_POLL_ADD,
  };
};

export function removePoll() {
  return {
    type: COMPOSE_POLL_REMOVE,
  };
};

export function addPollOption(title) {
  return {
    type: COMPOSE_POLL_OPTION_ADD,
    title,
  };
};

export function changePollOption(index, title) {
  return {
    type: COMPOSE_POLL_OPTION_CHANGE,
    index,
    title,
  };
};

export function removePollOption(index) {
  return {
    type: COMPOSE_POLL_OPTION_REMOVE,
    index,
  };
};

export function changePollSettings(expiresIn, isMultiple) {
  return {
    type: COMPOSE_POLL_SETTINGS_CHANGE,
    expiresIn,
    isMultiple,
  };
};

export function addDateTime() {
  return {
    type: COMPOSE_DATETIME_FORM_OPEN,
  };
};

export function removeDateTime() {
  return {
    type: COMPOSE_DATETIME_FORM_CLOSE,
  };
};

export function changeScheduled(value) {
  const date = value instanceof Date ? format(value, 'yyyy-MM-dd HH:mm') : value;

  return {
    type: COMPOSE_SCHEDULED_CHANGE,
    value: date,
  };
};

export function changeExpires(value) {
  const date = value instanceof Date ? format(value, 'yyyy-MM-dd HH:mm') : value;

  return {
    type: COMPOSE_EXPIRES_CHANGE,
    value: date,
  };
};

export function changeExpiresAction(value) {
  return {
    type: COMPOSE_EXPIRES_ACTION_CHANGE,
    value: value,
  };
};

export function addReference(id, change) {
  return (dispatch, getState) => {
    if (change) {
      const status = getState().getIn(['statuses', id]);
      const visibility = getState().getIn(['compose', 'privacy']);

      if (status && status.get('visibility') === 'private' && ['public', 'unlisted'].includes(visibility)) {
        dispatch(changeComposeVisibility('private'));
      }
    }

    dispatch({
      type: COMPOSE_REFERENCE_ADD,
      id: id,
    });
  };
};

export function removeReference(id) {
  return {
    type: COMPOSE_REFERENCE_REMOVE,
    id: id,
  };
};

export function resetReference() {
  return {
    type: COMPOSE_REFERENCE_RESET,
  };
};