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+//  Package imports.
+import PropTypes from 'prop-types';
+import React from 'react';
+import ImmutablePropTypes from 'react-immutable-proptypes';
+import { defineMessages } from 'react-intl';
+
+const APPROX_HASHTAG_RE = /(?:^|[^\/\)\w])#(\S+)/i;
+
+//  Actions.
+import {
+  cancelReplyCompose,
+  changeCompose,
+  changeComposeAdvancedOption,
+  changeComposeSensitivity,
+  changeComposeSpoilerText,
+  changeComposeSpoilerness,
+  changeComposeVisibility,
+  changeUploadCompose,
+  clearComposeSuggestions,
+  fetchComposeSuggestions,
+  insertEmojiCompose,
+  mountCompose,
+  selectComposeSuggestion,
+  submitCompose,
+  undoUploadCompose,
+  unmountCompose,
+  uploadCompose,
+} from 'flavours/glitch/actions/compose';
+import {
+  closeModal,
+  openModal,
+} from 'flavours/glitch/actions/modal';
+
+//  Components.
+import ComposerOptions from './options';
+import ComposerPublisher from './publisher';
+import ComposerReply from './reply';
+import ComposerSpoiler from './spoiler';
+import ComposerTextarea from './textarea';
+import ComposerUploadForm from './upload_form';
+import ComposerWarning from './warning';
+import ComposerHashtagWarning from './hashtag_warning';
+import ComposerDirectWarning from './direct_warning';
+
+//  Utils.
+import { countableText } from 'flavours/glitch/util/counter';
+import { me } from 'flavours/glitch/util/initial_state';
+import { isMobile } from 'flavours/glitch/util/is_mobile';
+import { assignHandlers } from 'flavours/glitch/util/react_helpers';
+import { wrap } from 'flavours/glitch/util/redux_helpers';
+import { privacyPreference } from 'flavours/glitch/util/privacy_preference';
+
+const messages = defineMessages({
+  missingDescriptionMessage: {  id: 'confirmations.missing_media_description.message',
+                                defaultMessage: 'At least one media attachment is lacking a description. Consider describing all media attachments for the visually impaired before sending your toot.' },
+  missingDescriptionConfirm: {  id: 'confirmations.missing_media_description.confirm',
+                                defaultMessage: 'Send anyway' },
+});
+
+//  State mapping.
+function mapStateToProps (state) {
+  const spoilersAlwaysOn = state.getIn(['local_settings', 'always_show_spoilers_field']);
+  const inReplyTo = state.getIn(['compose', 'in_reply_to']);
+  const replyPrivacy = inReplyTo ? state.getIn(['statuses', inReplyTo, 'visibility']) : null;
+  const sideArmBasePrivacy = state.getIn(['local_settings', 'side_arm']);
+  const sideArmRestrictedPrivacy = replyPrivacy ? privacyPreference(replyPrivacy, sideArmBasePrivacy) : null;
+  let sideArmPrivacy = null;
+  switch (state.getIn(['local_settings', 'side_arm_reply_mode'])) {
+    case 'copy':
+      sideArmPrivacy = replyPrivacy;
+      break;
+    case 'restrict':
+      sideArmPrivacy = sideArmRestrictedPrivacy;
+      break;
+  }
+  sideArmPrivacy = sideArmPrivacy || sideArmBasePrivacy;
+  return {
+    acceptContentTypes: state.getIn(['media_attachments', 'accept_content_types']).toArray().join(','),
+    advancedOptions: state.getIn(['compose', 'advanced_options']),
+    amUnlocked: !state.getIn(['accounts', me, 'locked']),
+    focusDate: state.getIn(['compose', 'focusDate']),
+    caretPosition: state.getIn(['compose', 'caretPosition']),
+    isSubmitting: state.getIn(['compose', 'is_submitting']),
+    isUploading: state.getIn(['compose', 'is_uploading']),
+    layout: state.getIn(['local_settings', 'layout']),
+    media: state.getIn(['compose', 'media_attachments']),
+    preselectDate: state.getIn(['compose', 'preselectDate']),
+    privacy: state.getIn(['compose', 'privacy']),
+    progress: state.getIn(['compose', 'progress']),
+    inReplyTo: inReplyTo ? state.getIn(['statuses', inReplyTo]) : null,
+    replyAccount: inReplyTo ? state.getIn(['statuses', inReplyTo, 'account']) : null,
+    replyContent: inReplyTo ? state.getIn(['statuses', inReplyTo, 'contentHtml']) : null,
+    resetFileKey: state.getIn(['compose', 'resetFileKey']),
+    sideArm: sideArmPrivacy,
+    sensitive: state.getIn(['compose', 'sensitive']),
+    showSearch: state.getIn(['search', 'submitted']) && !state.getIn(['search', 'hidden']),
+    spoiler: spoilersAlwaysOn || state.getIn(['compose', 'spoiler']),
+    spoilerText: state.getIn(['compose', 'spoiler_text']),
+    suggestionToken: state.getIn(['compose', 'suggestion_token']),
+    suggestions: state.getIn(['compose', 'suggestions']),
+    text: state.getIn(['compose', 'text']),
+    anyMedia: state.getIn(['compose', 'media_attachments']).size > 0,
+    spoilersAlwaysOn: spoilersAlwaysOn,
+    mediaDescriptionConfirmation: state.getIn(['local_settings', 'confirm_missing_media_description']),
+    preselectOnReply: state.getIn(['local_settings', 'preselect_on_reply']),
+  };
+};
+
+//  Dispatch mapping.
+const mapDispatchToProps = (dispatch, { intl }) => ({
+  onCancelReply() {
+    dispatch(cancelReplyCompose());
+  },
+  onChangeAdvancedOption(option, value) {
+    dispatch(changeComposeAdvancedOption(option, value));
+  },
+  onChangeDescription(id, description) {
+    dispatch(changeUploadCompose(id, { description }));
+  },
+  onChangeSensitivity() {
+    dispatch(changeComposeSensitivity());
+  },
+  onChangeSpoilerText(text) {
+    dispatch(changeComposeSpoilerText(text));
+  },
+  onChangeSpoilerness() {
+    dispatch(changeComposeSpoilerness());
+  },
+  onChangeText(text) {
+    dispatch(changeCompose(text));
+  },
+  onChangeVisibility(value) {
+    dispatch(changeComposeVisibility(value));
+  },
+  onClearSuggestions() {
+    dispatch(clearComposeSuggestions());
+  },
+  onCloseModal() {
+    dispatch(closeModal());
+  },
+  onFetchSuggestions(token) {
+    dispatch(fetchComposeSuggestions(token));
+  },
+  onInsertEmoji(position, emoji) {
+    dispatch(insertEmojiCompose(position, emoji));
+  },
+  onMount() {
+    dispatch(mountCompose());
+  },
+  onOpenActionsModal(props) {
+    dispatch(openModal('ACTIONS', props));
+  },
+  onOpenDoodleModal() {
+    dispatch(openModal('DOODLE', { noEsc: true }));
+  },
+  onOpenFocalPointModal(id) {
+    dispatch(openModal('FOCAL_POINT', { id }));
+  },
+  onSelectSuggestion(position, token, suggestion) {
+    dispatch(selectComposeSuggestion(position, token, suggestion));
+  },
+  onMediaDescriptionConfirm() {
+    dispatch(openModal('CONFIRM', {
+      message: intl.formatMessage(messages.missingDescriptionMessage),
+      confirm: intl.formatMessage(messages.missingDescriptionConfirm),
+      onConfirm: () => dispatch(submitCompose()),
+    }));
+  },
+  onSubmit() {
+    dispatch(submitCompose());
+  },
+  onUndoUpload(id) {
+    dispatch(undoUploadCompose(id));
+  },
+  onUnmount() {
+    dispatch(unmountCompose());
+  },
+  onUpload(files) {
+    dispatch(uploadCompose(files));
+  },
+});
+
+//  Handlers.
+const handlers = {
+
+  //  Changes the text value of the spoiler.
+  handleChangeSpoiler ({ target: { value } }) {
+    const { onChangeSpoilerText } = this.props;
+    if (onChangeSpoilerText) {
+      onChangeSpoilerText(value);
+    }
+  },
+
+  //  Inserts an emoji at the caret.
+  handleEmoji (data) {
+    const { textarea: { selectionStart } } = this;
+    const { onInsertEmoji } = this.props;
+    if (onInsertEmoji) {
+      onInsertEmoji(selectionStart, data);
+    }
+  },
+
+  //  Handles the secondary submit button.
+  handleSecondarySubmit () {
+    const { handleSubmit } = this.handlers;
+    const {
+      onChangeVisibility,
+      sideArm,
+    } = this.props;
+    if (sideArm !== 'none' && onChangeVisibility) {
+      onChangeVisibility(sideArm);
+    }
+    handleSubmit();
+  },
+
+  //  Selects a suggestion from the autofill.
+  handleSelect (tokenStart, token, value) {
+    const { onSelectSuggestion } = this.props;
+    if (onSelectSuggestion) {
+      onSelectSuggestion(tokenStart, token, value);
+    }
+  },
+
+  //  Submits the status.
+  handleSubmit () {
+    const { textarea: { value }, uploadForm } = this;
+    const {
+      onChangeText,
+      onSubmit,
+      isSubmitting,
+      isUploading,
+      media,
+      anyMedia,
+      text,
+      mediaDescriptionConfirmation,
+      onMediaDescriptionConfirm,
+    } = this.props;
+
+    //  If something changes inside the textarea, then we update the
+    //  state before submitting.
+    if (onChangeText && text !== value) {
+      onChangeText(value);
+    }
+
+    // Submit disabled:
+    if (isSubmitting || isUploading || (!text.trim().length && !anyMedia)) {
+      return;
+    }
+
+    // Submit unless there are media with missing descriptions
+    if (mediaDescriptionConfirmation && onMediaDescriptionConfirm && media && media.some(item => !item.get('description'))) {
+      const firstWithoutDescription = media.findIndex(item => !item.get('description'));
+      if (uploadForm) {
+        const inputs = uploadForm.querySelectorAll('.composer--upload_form--item input');
+        if (inputs.length == media.size && firstWithoutDescription !== -1) {
+          inputs[firstWithoutDescription].focus();
+        }
+      }
+      onMediaDescriptionConfirm();
+    } else if (onSubmit) {
+      onSubmit();
+    }
+  },
+
+  //  Sets a reference to the upload form.
+  handleRefUploadForm (uploadFormComponent) {
+    this.uploadForm = uploadFormComponent;
+  },
+
+  //  Sets a reference to the textarea.
+  handleRefTextarea (textareaComponent) {
+    if (textareaComponent) {
+      this.textarea = textareaComponent.textarea;
+    }
+  },
+
+  //  Sets a reference to the CW field.
+  handleRefSpoilerText (spoilerComponent) {
+    if (spoilerComponent) {
+      this.spoilerText = spoilerComponent.spoilerText;
+    }
+  }
+};
+
+//  The component.
+class Composer extends React.Component {
+
+  //  Constructor.
+  constructor (props) {
+    super(props);
+    assignHandlers(this, handlers);
+
+    //  Instance variables.
+    this.textarea = null;
+    this.spoilerText = null;
+  }
+
+  //  Tells our state the composer has been mounted.
+  componentDidMount () {
+    const { onMount } = this.props;
+    if (onMount) {
+      onMount();
+    }
+  }
+
+  //  Tells our state the composer has been unmounted.
+  componentWillUnmount () {
+    const { onUnmount } = this.props;
+    if (onUnmount) {
+      onUnmount();
+    }
+  }
+
+  //  This statement does several things:
+  //  - If we're beginning a reply, and,
+  //      - Replying to zero or one users, places the cursor at the end
+  //        of the textbox.
+  //      - Replying to more than one user, selects any usernames past
+  //        the first; this provides a convenient shortcut to drop
+  //        everyone else from the conversation.
+  componentDidUpdate (prevProps) {
+    const {
+      textarea,
+      spoilerText,
+    } = this;
+    const {
+      focusDate,
+      caretPosition,
+      isSubmitting,
+      preselectDate,
+      text,
+      preselectOnReply,
+    } = this.props;
+    let selectionEnd, selectionStart;
+
+    //  Caret/selection handling.
+    if (focusDate !== prevProps.focusDate) {
+      switch (true) {
+      case preselectDate !== prevProps.preselectDate && preselectOnReply:
+        selectionStart = text.search(/\s/) + 1;
+        selectionEnd = text.length;
+        break;
+      case !isNaN(caretPosition) && caretPosition !== null:
+        selectionStart = selectionEnd = caretPosition;
+        break;
+      default:
+        selectionStart = selectionEnd = text.length;
+      }
+      if (textarea) {
+        textarea.setSelectionRange(selectionStart, selectionEnd);
+        textarea.focus();
+        textarea.scrollIntoView();
+      }
+
+    //  Refocuses the textarea after submitting.
+    } else if (textarea && prevProps.isSubmitting && !isSubmitting) {
+      textarea.focus();
+    } else if (this.props.spoiler !== prevProps.spoiler) {
+      if (this.props.spoiler) {
+        if (spoilerText) {
+          spoilerText.focus();
+        }
+      } else {
+        if (textarea) {
+          textarea.focus();
+        }
+      }
+    }
+  }
+
+  render () {
+    const {
+      handleChangeSpoiler,
+      handleEmoji,
+      handleSecondarySubmit,
+      handleSelect,
+      handleSubmit,
+      handleRefUploadForm,
+      handleRefTextarea,
+      handleRefSpoilerText,
+    } = this.handlers;
+    const {
+      acceptContentTypes,
+      advancedOptions,
+      amUnlocked,
+      anyMedia,
+      intl,
+      isSubmitting,
+      isUploading,
+      layout,
+      media,
+      onCancelReply,
+      onChangeAdvancedOption,
+      onChangeDescription,
+      onChangeSensitivity,
+      onChangeSpoilerness,
+      onChangeText,
+      onChangeVisibility,
+      onClearSuggestions,
+      onCloseModal,
+      onFetchSuggestions,
+      onOpenActionsModal,
+      onOpenDoodleModal,
+      onOpenFocalPointModal,
+      onUndoUpload,
+      onUpload,
+      privacy,
+      progress,
+      inReplyTo,
+      resetFileKey,
+      sensitive,
+      showSearch,
+      sideArm,
+      spoiler,
+      spoilerText,
+      suggestions,
+      text,
+      spoilersAlwaysOn,
+    } = this.props;
+
+    let disabledButton = isSubmitting || isUploading || (!text.trim().length && !anyMedia);
+
+    return (
+      <div className='composer'>
+        {privacy === 'direct' ? <ComposerDirectWarning /> : null}
+        {privacy === 'private' && amUnlocked ? <ComposerWarning /> : null}
+        {privacy !== 'public' && APPROX_HASHTAG_RE.test(text) ? <ComposerHashtagWarning /> : null}
+        {inReplyTo && (
+          <ComposerReply
+            status={inReplyTo}
+            intl={intl}
+            onCancel={onCancelReply}
+          />
+        )}
+        <ComposerSpoiler
+          hidden={!spoiler}
+          intl={intl}
+          onChange={handleChangeSpoiler}
+          onSubmit={handleSubmit}
+          onSecondarySubmit={handleSecondarySubmit}
+          text={spoilerText}
+          ref={handleRefSpoilerText}
+        />
+        <ComposerTextarea
+          advancedOptions={advancedOptions}
+          autoFocus={!showSearch && !isMobile(window.innerWidth, layout)}
+          disabled={isSubmitting}
+          intl={intl}
+          onChange={onChangeText}
+          onPaste={onUpload}
+          onPickEmoji={handleEmoji}
+          onSubmit={handleSubmit}
+          onSecondarySubmit={handleSecondarySubmit}
+          onSuggestionsClearRequested={onClearSuggestions}
+          onSuggestionsFetchRequested={onFetchSuggestions}
+          onSuggestionSelected={handleSelect}
+          ref={handleRefTextarea}
+          suggestions={suggestions}
+          value={text}
+        />
+        {isUploading || media && media.size ? (
+          <ComposerUploadForm
+            intl={intl}
+            media={media}
+            onChangeDescription={onChangeDescription}
+            onOpenFocalPointModal={onOpenFocalPointModal}
+            onRemove={onUndoUpload}
+            progress={progress}
+            uploading={isUploading}
+            handleRef={handleRefUploadForm}
+          />
+        ) : null}
+        <ComposerOptions
+          acceptContentTypes={acceptContentTypes}
+          advancedOptions={advancedOptions}
+          disabled={isSubmitting}
+          full={media ? media.size >= 4 || media.some(
+            item => item.get('type') === 'video'
+          ) : false}
+          hasMedia={media && !!media.size}
+          intl={intl}
+          onChangeAdvancedOption={onChangeAdvancedOption}
+          onChangeSensitivity={onChangeSensitivity}
+          onChangeVisibility={onChangeVisibility}
+          onDoodleOpen={onOpenDoodleModal}
+          onModalClose={onCloseModal}
+          onModalOpen={onOpenActionsModal}
+          onToggleSpoiler={spoilersAlwaysOn ? null : onChangeSpoilerness}
+          onUpload={onUpload}
+          privacy={privacy}
+          resetFileKey={resetFileKey}
+          sensitive={sensitive || (spoilersAlwaysOn && spoilerText && spoilerText.length > 0)}
+          spoiler={spoilersAlwaysOn ? (spoilerText && spoilerText.length > 0) : spoiler}
+        />
+        <ComposerPublisher
+          countText={`${spoilerText}${countableText(text)}${advancedOptions && advancedOptions.get('do_not_federate') ? ' 👁️' : ''}`}
+          disabled={disabledButton}
+          intl={intl}
+          onSecondarySubmit={handleSecondarySubmit}
+          onSubmit={handleSubmit}
+          privacy={privacy}
+          sideArm={sideArm}
+        />
+      </div>
+    );
+  }
+
+}
+
+//  Props.
+Composer.propTypes = {
+  intl: PropTypes.object.isRequired,
+
+  //  State props.
+  acceptContentTypes: PropTypes.string,
+  advancedOptions: ImmutablePropTypes.map,
+  amUnlocked: PropTypes.bool,
+  focusDate: PropTypes.instanceOf(Date),
+  caretPosition: PropTypes.number,
+  isSubmitting: PropTypes.bool,
+  isUploading: PropTypes.bool,
+  layout: PropTypes.string,
+  media: ImmutablePropTypes.list,
+  preselectDate: PropTypes.instanceOf(Date),
+  privacy: PropTypes.string,
+  progress: PropTypes.number,
+  inReplyTo: ImmutablePropTypes.map,
+  resetFileKey: PropTypes.number,
+  sideArm: PropTypes.string,
+  sensitive: PropTypes.bool,
+  showSearch: PropTypes.bool,
+  spoiler: PropTypes.bool,
+  spoilerText: PropTypes.string,
+  suggestionToken: PropTypes.string,
+  suggestions: ImmutablePropTypes.list,
+  text: PropTypes.string,
+  anyMedia: PropTypes.bool,
+  spoilersAlwaysOn: PropTypes.bool,
+  mediaDescriptionConfirmation: PropTypes.bool,
+  preselectOnReply: PropTypes.bool,
+
+  //  Dispatch props.
+  onCancelReply: PropTypes.func,
+  onChangeAdvancedOption: PropTypes.func,
+  onChangeDescription: PropTypes.func,
+  onChangeSensitivity: PropTypes.func,
+  onChangeSpoilerText: PropTypes.func,
+  onChangeSpoilerness: PropTypes.func,
+  onChangeText: PropTypes.func,
+  onChangeVisibility: PropTypes.func,
+  onClearSuggestions: PropTypes.func,
+  onCloseModal: PropTypes.func,
+  onFetchSuggestions: PropTypes.func,
+  onInsertEmoji: PropTypes.func,
+  onMount: PropTypes.func,
+  onOpenActionsModal: PropTypes.func,
+  onOpenDoodleModal: PropTypes.func,
+  onSelectSuggestion: PropTypes.func,
+  onSubmit: PropTypes.func,
+  onUndoUpload: PropTypes.func,
+  onUnmount: PropTypes.func,
+  onUpload: PropTypes.func,
+  onMediaDescriptionConfirm: PropTypes.func,
+};
+
+//  Connecting and export.
+export { Composer as WrappedComponent };
+export default wrap(Composer, mapStateToProps, mapDispatchToProps, true);