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     }
  37
  38     WebSocketService.Instance.listCommunities(listCommunitiesForm);
  39
  40   }
  41
  42   componentWillUnmount() {
  43     this.subscription.unsubscribe();
  44   }
  45
  46   componentDidMount() {
  47     let table = document.querySelector('#community_table');
  48     Sortable.initTable(table);
  49   }
  50
  51   render() {
  52     return (
  53       <div class="container">
  54         {this.state.loading ?
  55         <h4 class=""><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h4> :
  56         <div>
  57           <h4>Communities</h4>
  58           <div class="table-responsive">
  59             <table id="community_table" class="table table-sm table-hover">
  60               <thead class="pointer">
  61                 <tr>
  62                   <th>Name</th>
  63                   <th>Title</th>
  64                   <th>Category</th>
  65                   <th class="text-right">Subscribers</th>
  66                   <th class="text-right">Posts</th>
  67                   <th class="text-right">Comments</th>
  68                   <th></th>
  69                 </tr>
  70               </thead>
  71               <tbody>
  72                 {this.state.communities.map(community =>
  73                   <tr>
  74                     <td><Link to={`/community/${community.id}`}>{community.name}</Link></td>
  75                     <td>{community.title}</td>
  76                     <td>{community.category_name}</td>
  77                     <td class="text-right">{community.number_of_subscribers}</td>
  78                     <td class="text-right">{community.number_of_posts}</td>
  79                     <td class="text-right">{community.number_of_comments}</td>
  80                     <td class="text-right">
  81                       {community.subscribed ?
  82                       <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleUnsubscribe)}>Unsubscribe</button> :
  83                       <button class="btn btn-sm btn-secondary" onClick={linkEvent(community.id, this.handleSubscribe)}>Subscribe</button>
  84                       }
  85                     </td>
  86                   </tr>
  87                 )}
  88               </tbody>
  89             </table>
  90           </div>
  91         </div>
  92         }
  93       </div>
  94     );
  95   }
  96
  97   handleUnsubscribe(communityId: number) {
  98     let form: FollowCommunityForm = {
  99       community_id: communityId,
 100       follow: false
 101     };
 102     WebSocketService.Instance.followCommunity(form);
 103   }
 104
 105   handleSubscribe(communityId: number) {
 106     let form: FollowCommunityForm = {
 107       community_id: communityId,
 108       follow: true
 109     };
 110     WebSocketService.Instance.followCommunity(form);
 111   }
 112
 113   parseMessage(msg: any) {
 114     console.log(msg);
 115     let op: UserOperation = msgOp(msg);
 116     if (msg.error) {
 117       alert(msg.error);
 118       return;
 119     } else if (op == UserOperation.ListCommunities) {
 120       let res: ListCommunitiesResponse = msg;
 121       this.state.communities = res.communities;
 122       this.state.communities.sort((a, b) => b.number_of_subscribers - a.number_of_subscribers);
 123       this.state.loading = false;
 124       this.setState(this.state);
 125     } else if (op == UserOperation.FollowCommunity) {
 126       let res: CommunityResponse = msg;
 127       let found = this.state.communities.find(c => c.id == res.community.id);
 128       found.subscribed = res.community.subscribed;
 129       found.number_of_subscribers = res.community.number_of_subscribers;
 130       this.setState(this.state);
 131     }
 132   }
 133 }