ui/src/components/post-listings.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, Post, GetPostsForm, SortType, ListingType, GetPostsResponse, CreatePostLikeResponse, CommunityUser} from '../interfaces';
   6 import { WebSocketService, UserService } from '../services';
   7 import { PostListing } from './post-listing';
   8 import { msgOp, fetchLimit } from '../utils';
   9
  10 interface PostListingsProps {
  11   type?: ListingType;
  12   communityId?: number;
  13 }
  14
  15 interface PostListingsState {
  16   moderators: Array<CommunityUser>;
  17   posts: Array<Post>;
  18   sortType: SortType;
  19   type_: ListingType;
  20   page: number;
  21   loading: boolean;
  22 }
  23
  24 export class PostListings extends Component<PostListingsProps, PostListingsState> {
  25
  26   private subscription: Subscription;
  27   private emptyState: PostListingsState = {
  28     moderators: [],
  29     posts: [],
  30     sortType: SortType.Hot,
  31     type_: (this.props.type !== undefined && UserService.Instance.user) ? this.props.type :
  32       this.props.communityId
  33         ? ListingType.Community
  34         : UserService.Instance.user
  35           ? ListingType.Subscribed
  36           : ListingType.All,
  37           page: 1,
  38           loading: true
  39   }
  40
  41   constructor(props: any, context: any) {
  42     super(props, context);
  43
  44     this.state = this.emptyState;
  45
  46     this.subscription = WebSocketService.Instance.subject
  47       .pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
  48       .subscribe(
  49         (msg) => this.parseMessage(msg),
  50         (err) => console.error(err),
  51         () => console.log('complete')
  52       );
  53
  54       this.refetch();
  55   }
  56
  57   componentWillUnmount() {
  58     this.subscription.unsubscribe();
  59   }
  60
  61   render() {
  62     return (
  63       <div>
  64         {this.state.loading ?
  65         <h5><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h5> :
  66         <div>
  67           {this.selects()}
  68           {this.state.posts.length > 0
  69             ? this.state.posts.map(post =>
  70               <PostListing post={post} showCommunity={!this.props.communityId}/>)
  71                 : <div>No Listings. {!this.props.communityId && <span>Subscribe to some <Link to="/communities">forums</Link>.</span>}</div>
  72           }
  73           {this.paginator()}
  74         </div>
  75         }
  76       </div>
  77     )
  78   }
  79
  80   selects() {
  81     return (
  82       <div className="mb-2">
  83         <select value={this.state.sortType} onChange={linkEvent(this, this.handleSortChange)} class="custom-select w-auto">
  84           <option disabled>Sort Type</option>
  85           <option value={SortType.Hot}>Hot</option>
  86           <option value={SortType.New}>New</option>
  87           <option disabled>──────────</option>
  88           <option value={SortType.TopDay}>Top Day</option>
  89           <option value={SortType.TopWeek}>Week</option>
  90           <option value={SortType.TopMonth}>Month</option>
  91           <option value={SortType.TopYear}>Year</option>
  92           <option value={SortType.TopAll}>All</option>
  93         </select>
  94         {!this.props.communityId &&
  95           UserService.Instance.user &&
  96             <select value={this.state.type_} onChange={linkEvent(this, this.handleTypeChange)} class="ml-2 custom-select w-auto">
  97               <option disabled>Type</option>
  98               <option value={ListingType.All}>All</option>
  99               <option value={ListingType.Subscribed}>Subscribed</option>
 100             </select>
 101
 102         }
 103       </div>
 104     )
 105   }
 106
 107   paginator() {
 108     return (
 109       <div class="mt-2">
 110         {this.state.page > 1 &&
 111           <button class="btn btn-sm btn-secondary mr-1" onClick={linkEvent(this, this.prevPage)}>Prev</button>
 112         }
 113         <button class="btn btn-sm btn-secondary" onClick={linkEvent(this, this.nextPage)}>Next</button>
 114       </div>
 115     );
 116   }
 117
 118   nextPage(i: PostListings) {
 119     i.state.page++;
 120     i.setState(i.state);
 121     i.refetch();
 122   }
 123
 124   prevPage(i: PostListings) {
 125     i.state.page--;
 126     i.setState(i.state);
 127     i.refetch();
 128   }
 129
 130   handleSortChange(i: PostListings, event: any) {
 131     i.state.sortType = Number(event.target.value);
 132     i.state.page = 1;
 133     i.setState(i.state);
 134     i.refetch();
 135   }
 136
 137   refetch() {
 138     let getPostsForm: GetPostsForm = {
 139       community_id: this.props.communityId,
 140       page: this.state.page,
 141       limit: fetchLimit,
 142       sort: SortType[this.state.sortType],
 143       type_: ListingType[this.state.type_]
 144     }
 145     WebSocketService.Instance.getPosts(getPostsForm);
 146   }
 147
 148   handleTypeChange(i: PostListings, event: any) {
 149     i.state.type_ = Number(event.target.value);
 150     i.state.page = 1;
 151     if (i.state.type_ == ListingType.All) {
 152       i.context.router.history.push('/all');
 153     } else {
 154       i.context.router.history.push('/');
 155     }
 156     i.setState(i.state);
 157     i.refetch();
 158   }
 159
 160   parseMessage(msg: any) {
 161     console.log(msg);
 162     let op: UserOperation = msgOp(msg);
 163     if (msg.error) {
 164       alert(msg.error);
 165       return;
 166     } else if (op == UserOperation.GetPosts) {
 167       let res: GetPostsResponse = msg;
 168       this.state.posts = res.posts;
 169       this.state.loading = false;
 170       this.setState(this.state);
 171     } else if (op == UserOperation.CreatePostLike) {
 172       let res: CreatePostLikeResponse = msg;
 173       let found = this.state.posts.find(c => c.id == res.post.id);
 174       found.my_vote = res.post.my_vote;
 175       found.score = res.post.score;
 176       found.upvotes = res.post.upvotes;
 177       found.downvotes = res.post.downvotes;
 178       this.setState(this.state);
 179     }
 180   }
 181 }
 182
 183