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