ui/src/components/communities.tsx

   1 import { Component, linkEvent } from 'inferno';
   2 import { Link } from 'inferno-router';
   3 import { Subscription } from "rxjs";
   4 import { retryWhen, delay, take } from 'rxjs/operators';
   5 import { UserOperation, Community, ListCommunitiesResponse, CommunityResponse, FollowCommunityForm } from '../interfaces';
   6 import { WebSocketService } from '../services';
   7 import { msgOp } from '../utils';
   8
   9 declare const Sortable: any;
  10
  11 interface CommunitiesState {
  12   communities: Array<Community>;
  13   loading: boolean;
  14 }
  15
  16 export class Communities extends Component<any, CommunitiesState> {
  17   private subscription: Subscription;
  18   private emptyState: CommunitiesState = {
  19     communities: [],
  20     loading: true
  21   }
  22
  23   constructor(props: any, context: any) {
  24     super(props, context);
  25     this.state = this.emptyState;
  26     this.subscription = WebSocketService.Instance.subject
  27     .pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
  28     .subscribe(
  29       (msg) => this.parseMessage(msg),
  30         (err) => console.error(err),
  31         () => console.log('complete')
  32     );
  33     WebSocketService.Instance.listCommunities();
  34
  35   }
  36
  37   componentWillUnmount() {
  38     this.subscription.unsubscribe();
  39   }
  40
  41   componentDidMount() {
  42     let table = document.querySelector('#community_table');
  43     Sortable.initTable(table);
  44   }
  45
  46   render() {
  47     return (
  48       <div class="container">
  49         {this.state.loading ?
  50         <h4 class=""><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h4> :
  51         <div>
  52           <h4>Communities</h4>
  53           <div class="table-responsive">
  54             <table id="community_table" class="table table-sm table-hover">
  55               <thead class="pointer">
  56                 <tr>
  57                   <th>Name</th>
  58                   <th>Title</th>
  59                   <th>Category</th>
  60                   <th class="text-right">Subscribers</th>
  61                   <th class="text-right">Posts</th>
  62                   <th class="text-right">Comments</th>
  63                   <th></th>
  64                 </tr>
  65               </thead>
  66               <tbody>
  67                 {this.state.communities.map(community =>
  68                   <tr>
  69                     <td><Link to={`/community/${community.id}`}>{community.name}</Link></td>
  70                     <td>{community.title}</td>
  71                     <td>{community.category_name}</td>
  72                     <td class="text-right">{community.number_of_subscribers}</td>
  73                     <td class="text-right">{community.number_of_posts}</td>
  74                     <td class="text-right">{community.number_of_comments}</td>
  75                     <td class="text-right">
  76                       {community.subscribed ?
  77                       <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleUnsubscribe)}>Unsubscribe</button> :
  78                       <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleSubscribe)}>Subscribe</button>
  79                       }
  80                     </td>
  81                   </tr>
  82                 )}
  83               </tbody>
  84             </table>
  85           </div>
  86         </div>
  87         }
  88       </div>
  89     );
  90   }
  91
  92   handleUnsubscribe(communityId: number) {
  93     let form: FollowCommunityForm = {
  94       community_id: communityId,
  95       follow: false
  96     };
  97     WebSocketService.Instance.followCommunity(form);
  98   }
  99
 100
 101   handleSubscribe(communityId: number) {
 102     let form: FollowCommunityForm = {
 103       community_id: communityId,
 104       follow: true
 105     };
 106     WebSocketService.Instance.followCommunity(form);
 107   }
 108
 109   parseMessage(msg: any) {
 110     console.log(msg);
 111     let op: UserOperation = msgOp(msg);
 112     if (msg.error) {
 113       alert(msg.error);
 114       return;
 115     } else if (op == UserOperation.ListCommunities) {
 116       let res: ListCommunitiesResponse = msg;
 117       this.state.communities = res.communities;
 118       this.state.communities.sort((a, b) => b.number_of_subscribers - a.number_of_subscribers);
 119       this.state.loading = false;
 120       this.setState(this.state);
 121     } else if (op == UserOperation.FollowCommunity) {
 122       let res: CommunityResponse = msg;
 123       let found = this.state.communities.find(c => c.id == res.community.id);
 124       found.subscribed = res.community.subscribed;
 125       found.number_of_subscribers = res.community.number_of_subscribers;
 126       this.setState(this.state);
 127     }
 128   }
 129 }