text: import React, {Component} from 'react';
  import Sidebar from 'react-sidebar';
  import './App.css';
  import Room from './components/Room'
  import axios from 'axios'
  import RoomList from "./components/RoomList";
  import Header from "./components/Header";
  
  var timer = null;
  const url = process.env.NODE_ENV === 'development' ? 'http://localhost:5555' : 'https://saarsayfan.pythonanywhere.com/';
  
  class App extends Component {
      constructor(props) {
          super(props);
          this.state = {
              rooms: [],
              roomName: 'room0',
              messages: [['!ALERT', 'SYSTEM', 'Not Logged In']],
              error: '',
          };
      }
  
      onLogin = (authToken) => {
          this.setState({...this.state, authToken: authToken});
          this.getRooms();
      };
  
      onLogout = () => {
          clearInterval(timer);
          timer = null;
          this.setState({...this.state,
              authToken: '',
              rooms: [],
              messages: [['!ALERT', 'SYSTEM', 'Not Logged In']]}, function () {console.log(this.state)});
      };
  
      onRoomChange = (room) => {
          this.setState({...this.state, roomName: room});
      };
      
      onCreateRoom = (url, room) => {
          axios.post(`${url}/room/${room}`, {},
              {headers: {Authorization: this.state.authToken}})
              .then((data) => {
                  this.getRooms();
              })
              .catch(e => this.onError(e.message));
      };
  
      onDeleteRoom = (url, room) => {
          axios.delete(`${url}/room/${room}`,
              {headers: {Authorization: this.state.authToken}})
              .then((data) => {
                  let newRooms = this.state.rooms;
                  let index = newRooms.indexOf(room);
                  if (index !== -1) {
                      newRooms.splice(index, 1);
                  }
                  this.setState({...this.state, rooms: newRooms, roomName: 'room0'});
              })
              .catch(e => this.onError(e.message));
      };
  
      getRooms = () => {
          const config = {headers: {Authorization: this.state.authToken}};
          return axios.get(`${url}/rooms`, config)
              .then((data) => {
                  this.setState({...this.state, rooms: data.data.result});
                  this.joinRooms(data.data.result);
              })
              .catch(e => console.log(e));
      };
  
      joinRooms = (rooms) => {
          const config = {headers: {Authorization: this.state.authToken}};
          axios.post(`${url}/room_member/${rooms[0]}`, {}, config)
              .then((data) => data)
              .catch(e => console.log(e))
              .then(() => {if (timer === null){
                  timer = setInterval(() => this.fetchMessages(), 500)}});
          for (let i = 1; i < this.state.rooms.length; i++) {
              axios.post(`${url}/room_member/${rooms[i]}`, {}, config)
                  .then((data) => data)
                  .catch(e => console.log(e));
          }
      };
  
      fetchMessages = () => {
          if (this.state.rooms !== [])
          {
              let room = this.state.roomName;
              const config = {headers: {Authorization: this.state.authToken}};
              const end = new Date().toISOString();
              let start = new Date();
              start.setDate(start.getDate() - 10000);
              start = start.toISOString();
  
              axios.get(`${url}/messages/${room}/${start}/${end}`, config)
                  .then((response) => {
                      let messages = response.data.result;
                      if (messages.length !== this.state.messages.length) {
                          this.setState({...this.state, messages: response.data.result});
                      }
                  })
                  .catch(e => console.log(e));
          }
      };
  
      onError = (error) => {
          this.setState({...this.state, error: error}, function () {console.log(this.state.error)});
      };
  
      clearError = () => {
          this.setState({...this.state, error: ''})
      };
  
      render() {
          let roomList = <RoomList rooms={this.state.rooms}
                                   onRoomChange={this.onRoomChange}
                                   activeRoom={this.state.roomName}
                                   onDeleteRoom={this.onDeleteRoom}
                                   url={url}/>;
          const scrollStyle = {content: {'overflowY': 'hidden', 'overflowX': 'hidden'}};
          let vh = Math.max(document.documentElement.clientHeight, window.innerHeight || 0);
          let height = vh - (this.state.error === '' ? 124 :  174);
          const heightStyle = {'height': `${height}px`};
          return (
              <div className="App">
                  <Sidebar sidebar={roomList} docked={true} pullRight={true} styles={scrollStyle}>
                      <Header url={url}
                              onLogin={this.onLogin}
                              onCreateRoom={this.onCreateRoom}
                              onError={this.onError}
                              message={this.state.error}
                              clearError={this.clearError}
                              onLogout={this.onLogout}/>
                      <Room messages={this.state.messages}
                            roomName={this.state.roomName}
                            url={url}
                            auth={this.state.authToken}
                            heightStyle={heightStyle}/>
                  </Sidebar>
              </div>
          )
      }
  }
  
  
  export default App;
  