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, ListCommunitiesForm, SortType } 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
  34     let listCommunitiesForm: ListCommunitiesForm = {
  35       sort: SortType[SortType.TopAll],
  36       limit: 100,
  37     }
  38
  39     WebSocketService.Instance.listCommunities(listCommunitiesForm);
  40
  41   }
  42
  43   componentWillUnmount() {
  44     this.subscription.unsubscribe();
  45   }
  46
  47   componentDidMount() {
  48     document.title = "Forums - Lemmy";
  49     let table = document.querySelector('#community_table');
  50     Sortable.initTable(table);
  51   }
  52
  53   render() {
  54     return (
  55       <div class="container">
  56         {this.state.loading ?
  57         <h5 class=""><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h5> :
  58         <div>
  59           <h5>Forums</h5>
  60           <div class="table-responsive">
  61             <table id="community_table" class="table table-sm table-hover">
  62               <thead class="pointer">
  63                 <tr>
  64                   <th>Name</th>
  65                   <th>Title</th>
  66                   <th>Category</th>
  67                   <th class="text-right d-none d-md-table-cell">Subscribers</th>
  68                   <th class="text-right d-none d-md-table-cell">Posts</th>
  69                   <th class="text-right d-none d-md-table-cell">Comments</th>
  70                   <th></th>
  71                 </tr>
  72               </thead>
  73               <tbody>
  74                 {this.state.communities.map(community =>
  75                   <tr>
  76                     <td><Link to={`/f/${community.name}`}>{community.name}</Link></td>
  77                     <td>{community.title}</td>
  78                     <td>{community.category_name}</td>
  79                     <td class="text-right d-none d-md-table-cell">{community.number_of_subscribers}</td>
  80                     <td class="text-right d-none d-md-table-cell">{community.number_of_posts}</td>
  81                     <td class="text-right d-none d-md-table-cell">{community.number_of_comments}</td>
  82                     <td class="text-right">
  83                       {community.subscribed ?
  84                       <span class="pointer btn-link" onClick={linkEvent(community.id, this.handleUnsubscribe)}>Unsubscribe</span> :
  85                       <span class="pointer btn-link" onClick={linkEvent(community.id, this.handleSubscribe)}>Subscribe</span>
  86                       }
  87                     </td>
  88                   </tr>
  89                 )}
  90               </tbody>
  91             </table>
  92           </div>
  93         </div>
  94         }
  95       </div>
  96     );
  97   }
  98
  99   handleUnsubscribe(communityId: number) {
 100     let form: FollowCommunityForm = {
 101       community_id: communityId,
 102       follow: false
 103     };
 104     WebSocketService.Instance.followCommunity(form);
 105   }
 106
 107   handleSubscribe(communityId: number) {
 108     let form: FollowCommunityForm = {
 109       community_id: communityId,
 110       follow: true
 111     };
 112     WebSocketService.Instance.followCommunity(form);
 113   }
 114
 115   parseMessage(msg: any) {
 116     console.log(msg);
 117     let op: UserOperation = msgOp(msg);
 118     if (msg.error) {
 119       alert(msg.error);
 120       return;
 121     } else if (op == UserOperation.ListCommunities) {
 122       let res: ListCommunitiesResponse = msg;
 123       this.state.communities = res.communities;
 124       this.state.communities.sort((a, b) => b.number_of_subscribers - a.number_of_subscribers);
 125       this.state.loading = false;
 126       this.setState(this.state);
 127     } else if (op == UserOperation.FollowCommunity) {
 128       let res: CommunityResponse = msg;
 129       let found = this.state.communities.find(c => c.id == res.community.id);
 130       found.subscribed = res.community.subscribed;
 131       found.number_of_subscribers = res.community.number_of_subscribers;
 132       this.setState(this.state);
 133     }
 134   }
 135 }