content: import React from 'react';
  import CharacterCounter from './character_counter';
  import Button from '../../../components/button';
  import ImmutablePropTypes from 'react-immutable-proptypes';
  import PropTypes from 'prop-types';
  import ReplyIndicatorContainer from '../containers/reply_indicator_container';
  import AutosuggestTextarea from '../../../components/autosuggest_textarea';
  import { debounce } from 'lodash';
  import UploadButtonContainer from '../containers/upload_button_container';
  import { defineMessages, injectIntl } from 'react-intl';
  import Collapsable from '../../../components/collapsable';
  import SpoilerButtonContainer from '../containers/spoiler_button_container';
  import PrivacyDropdownContainer from '../containers/privacy_dropdown_container';
  import SensitiveButtonContainer from '../containers/sensitive_button_container';
  import EmojiPickerDropdown from './emoji_picker_dropdown';
  import UploadFormContainer from '../containers/upload_form_container';
  import WarningContainer from '../containers/warning_container';
  import ImmutablePureComponent from 'react-immutable-pure-component';
  import { length } from 'stringz';
  
  const messages = defineMessages({
    placeholder: { id: 'compose_form.placeholder', defaultMessage: 'What is on your mind?' },
    spoiler_placeholder: { id: 'compose_form.spoiler_placeholder', defaultMessage: 'Content warning' },
    publish: { id: 'compose_form.publish', defaultMessage: 'Toot' },
    publishLoud: { id: 'compose_form.publish_loud', defaultMessage: '{publish}!' },
  });
  
  @injectIntl
  export default class ComposeForm extends ImmutablePureComponent {
  
    static propTypes = {
      intl: PropTypes.object.isRequired,
      text: PropTypes.string.isRequired,
      suggestion_token: PropTypes.string,
      suggestions: ImmutablePropTypes.list,
      spoiler: PropTypes.bool,
      privacy: PropTypes.string,
      spoiler_text: PropTypes.string,
      focusDate: PropTypes.instanceOf(Date),
      preselectDate: PropTypes.instanceOf(Date),
      is_submitting: PropTypes.bool,
      is_uploading: PropTypes.bool,
      me: PropTypes.number,
      onChange: PropTypes.func.isRequired,
      onSubmit: PropTypes.func.isRequired,
      onClearSuggestions: PropTypes.func.isRequired,
      onFetchSuggestions: PropTypes.func.isRequired,
      onSuggestionSelected: PropTypes.func.isRequired,
      onChangeSpoilerText: PropTypes.func.isRequired,
      onPaste: PropTypes.func.isRequired,
      onPickEmoji: PropTypes.func.isRequired,
      showSearch: PropTypes.bool,
    };
  
    static defaultProps = {
      showSearch: false,
    };
  
    handleChange = (e) => {
      this.props.onChange(e.target.value);
    }
  
    handleKeyDown = (e) => {
      if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
        this.handleSubmit();
      }
    }
  
    handleSubmit = () => {
      if (this.props.text !== this.autosuggestTextarea.textarea.value) {
        // Something changed the text inside the textarea (e.g. browser extensions like Grammarly)
        // Update the state to match the current text
        this.props.onChange(this.autosuggestTextarea.textarea.value);
      }
  
      this.props.onSubmit();
    }
  
    onSuggestionsClearRequested = () => {
      this.props.onClearSuggestions();
    }
  
    onSuggestionsFetchRequested = debounce((token) => {
      this.props.onFetchSuggestions(token);
    }, 500, { trailing: true })
  
    onSuggestionSelected = (tokenStart, token, value) => {
      this._restoreCaret = null;
      this.props.onSuggestionSelected(tokenStart, token, value);
    }
  
    handleChangeSpoilerText = (e) => {
      this.props.onChangeSpoilerText(e.target.value);
    }
  
    componentWillReceiveProps (nextProps) {
      // If this is the update where we've finished uploading,
      // save the last caret position so we can restore it below!
      if (!nextProps.is_uploading && this.props.is_uploading) {
        this._restoreCaret = this.autosuggestTextarea.textarea.selectionStart;
      }
    }
  
    componentDidUpdate (prevProps) {
      // 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.
      // - If we've just finished uploading an image, and have a saved caret position,
      //   restores the cursor to that position after the text changes!
      if (this.props.focusDate !== prevProps.focusDate || (prevProps.is_uploading && !this.props.is_uploading && typeof this._restoreCaret === 'number')) {
        let selectionEnd, selectionStart;
  
        if (this.props.preselectDate !== prevProps.preselectDate) {
          selectionEnd   = this.props.text.length;
          selectionStart = this.props.text.search(/\s/) + 1;
        } else if (typeof this._restoreCaret === 'number') {
          selectionStart = this._restoreCaret;
          selectionEnd   = this._restoreCaret;
        } else {
          selectionEnd   = this.props.text.length;
          selectionStart = selectionEnd;
        }
  
        this.autosuggestTextarea.textarea.setSelectionRange(selectionStart, selectionEnd);
        this.autosuggestTextarea.textarea.focus();
      } else if(prevProps.is_submitting && !this.props.is_submitting) {
        this.autosuggestTextarea.textarea.focus();
      }
    }
  
    setAutosuggestTextarea = (c) => {
      this.autosuggestTextarea = c;
    }
  
    handleEmojiPick = (data) => {
      const position     = this.autosuggestTextarea.textarea.selectionStart;
      this._restoreCaret = position + data.shortname.length + 1;
      this.props.onPickEmoji(position, data);
    }
  
    render () {
      const { intl, onPaste, showSearch } = this.props;
      const disabled = this.props.is_submitting;
      const text = [this.props.spoiler_text, this.props.text].join('');
  
      let publishText    = '';
  
      if (this.props.privacy === 'private' || this.props.privacy === 'direct') {
        publishText = <span className='compose-form__publish-private'><i className='fa fa-lock' /> {intl.formatMessage(messages.publish)}</span>;
      } else {
        publishText = this.props.privacy !== 'unlisted' ? intl.formatMessage(messages.publishLoud, { publish: intl.formatMessage(messages.publish) }) : intl.formatMessage(messages.publish);
      }
  
      return (
        <div className='compose-form'>
          <Collapsable isVisible={this.props.spoiler} fullHeight={50}>
            <div className='spoiler-input'>
              <input placeholder={intl.formatMessage(messages.spoiler_placeholder)} value={this.props.spoiler_text} onChange={this.handleChangeSpoilerText} onKeyDown={this.handleKeyDown} type='text' className='spoiler-input__input'  id='cw-spoiler-input' />
            </div>
          </Collapsable>
  
          <WarningContainer />
  
          <ReplyIndicatorContainer />
  
          <div className='compose-form__autosuggest-wrapper'>
            <AutosuggestTextarea
              ref={this.setAutosuggestTextarea}
              placeholder={intl.formatMessage(messages.placeholder)}
              disabled={disabled}
              value={this.props.text}
              onChange={this.handleChange}
              suggestions={this.props.suggestions}
              onKeyDown={this.handleKeyDown}
              onSuggestionsFetchRequested={this.onSuggestionsFetchRequested}
              onSuggestionsClearRequested={this.onSuggestionsClearRequested}
              onSuggestionSelected={this.onSuggestionSelected}
              onPaste={onPaste}
              autoFocus={!showSearch}
            />
  
            <EmojiPickerDropdown onPickEmoji={this.handleEmojiPick} />
          </div>
  
          <div className='compose-form__modifiers'>
            <UploadFormContainer />
          </div>
  
          <div className='compose-form__buttons-wrapper'>
            <div className='compose-form__buttons'>
              <UploadButtonContainer />
              <PrivacyDropdownContainer />
              <SensitiveButtonContainer />
              <SpoilerButtonContainer />
            </div>
  
            <div className='compose-form__publish'>
              <div className='character-counter__wrapper'><CharacterCounter max={500} text={text} /></div>
              <div className='compose-form__publish-button-wrapper'><Button text={publishText} onClick={this.handleSubmit} disabled={disabled || this.props.is_uploading || length(text) > 500 || (text.length !==0 && text.trim().length === 0)} block /></div>
            </div>
          </div>
        </div>
      );
    }
  
  }
  