text: /*
  Copyright 2016 Aviral Dasgupta
  Copyright 2017 Vector Creations Ltd
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  */
  
  import React from 'react';
  import { _t } from '../languageHandler';
  import AutocompleteProvider from './AutocompleteProvider';
  import MatrixClientPeg from '../MatrixClientPeg';
  import Fuse from 'fuse.js';
  import {PillCompletion} from './Components';
  import {getDisplayAliasForRoom} from '../Rooms';
  import sdk from '../index';
  
  const ROOM_REGEX = /(?=#)(\S*)/g;
  
  let instance = null;
  
  export default class RoomProvider extends AutocompleteProvider {
      constructor() {
          super(ROOM_REGEX, {
              keys: ['displayName', 'userId'],
          });
          this.fuse = new Fuse([], {
             keys: ['name', 'roomId', 'aliases'],
          });
      }
  
      async getCompletions(query: string, selection: {start: number, end: number}, force = false) {
          const RoomAvatar = sdk.getComponent('views.avatars.RoomAvatar');
  
          let client = MatrixClientPeg.get();
          let completions = [];
          const {command, range} = this.getCurrentCommand(query, selection, force);
          if (command) {
              // the only reason we need to do this is because Fuse only matches on properties
              this.fuse.set(client.getRooms().filter(room => !!room).map(room => {
                  return {
                      room: room,
                      name: room.name,
                      aliases: room.getAliases(),
                  };
              }));
              completions = this.fuse.search(command[0]).map(room => {
                  let displayAlias = getDisplayAliasForRoom(room.room) || room.roomId;
                  return {
                      completion: displayAlias,
                      component: (
                          <PillCompletion initialComponent={<RoomAvatar width={24} height={24} room={room.room} />} title={room.name} description={displayAlias} />
                      ),
                      range,
                  };
              }).filter(completion => !!completion.completion && completion.completion.length > 0).slice(0, 4);
          }
          return completions;
      }
  
      getName() {
          return '💬 ' + _t('Rooms');
      }
  
      static getInstance() {
          if (instance == null) {
              instance = new RoomProvider();
          }
  
          return instance;
      }
  
      renderCompletions(completions: [React.Component]): ?React.Component {
          return <div className="mx_Autocomplete_Completion_container_pill">
              {completions}
          </div>;
      }
  
      shouldForceComplete(): boolean {
          return true;
      }
  }
  