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