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, Post as PostI, GetPostResponse, PostResponse, Comment, CommentForm as CommentFormI, CommentResponse, CommentLikeForm, CommentSortType, CreatePostLikeResponse, ListCommunitiesResponse, CommunityResponse, FollowCommunityForm } from '../interfaces';
   6 import { WebSocketService, UserService } from '../services';
   7 import { msgOp, hotRank,mdToHtml } 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, context) {
  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   componentDidMount() {
  36     let table = document.querySelector('#community_table');
  37     Sortable.initTable(table);
  38   }
  39
  40   render() {
  41     return (
  42       <div class="container-fluid">
  43         <h4>Communities</h4>
  44         <div class="table-responsive">
  45           <table id="community_table" class="table table-sm table-hover" data-sortable>
  46             <thead>
  47               <tr>
  48                 <th>Name</th>
  49                 <th>Title</th>
  50                 <th>Category</th>
  51                 <th class="text-right">Subscribers</th>
  52                 <th class="text-right">Posts</th>
  53                 <th class="text-right">Comments</th>
  54                 <th></th>
  55               </tr>
  56             </thead>
  57             <tbody>
  58               {this.state.communities.map(community =>
  59                 <tr>
  60                   <td><Link to={`/community/${community.id}`}>{community.name}</Link></td>
  61                   <td>{community.title}</td>
  62                   <td>{community.category_name}</td>
  63                   <td class="text-right">{community.number_of_subscribers}</td>
  64                   <td class="text-right">{community.number_of_posts}</td>
  65                   <td class="text-right">{community.number_of_comments}</td>
  66                   <td class="text-right">
  67                     {community.subscribed
  68                       ? <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleUnsubscribe)}>Unsubscribe</button>
  69                       : <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleSubscribe)}>Subscribe</button>
  70                     }
  71                   </td>
  72                 </tr>
  73               )}
  74             </tbody>
  75           </table>
  76         </div>
  77       </div>
  78     );
  79   }
  80
  81   handleUnsubscribe(communityId: number) {
  82     let form: FollowCommunityForm = {
  83       community_id: communityId,
  84       follow: false
  85     };
  86     WebSocketService.Instance.followCommunity(form);
  87   }
  88
  89
  90   handleSubscribe(communityId: number) {
  91     let form: FollowCommunityForm = {
  92       community_id: communityId,
  93       follow: true
  94     };
  95     WebSocketService.Instance.followCommunity(form);
  96   }
  97
  98   parseMessage(msg: any) {
  99     console.log(msg);
 100     let op: UserOperation = msgOp(msg);
 101     if (msg.error) {
 102       alert(msg.error);
 103       return;
 104     } else if (op == UserOperation.ListCommunities) {
 105       let res: ListCommunitiesResponse = msg;
 106       this.state.communities = res.communities;
 107       this.state.communities.sort((a, b) => b.number_of_subscribers - a.number_of_subscribers);
 108       this.setState(this.state);
 109     } else if (op == UserOperation.FollowCommunity) {
 110       let res: CommunityResponse = msg;
 111       let found = this.state.communities.find(c => c.id == res.community.id);
 112       found.subscribed = res.community.subscribed;
 113       found.number_of_subscribers = res.community.number_of_subscribers;
 114       this.setState(this.state);
 115     }
 116   }
 117 }