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, Community as CommunityI, 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   community: CommunityI;
  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     community: {
  29       id: null,
  30       name: null,
  31       title: null,
  32       category_id: null,
  33       category_name: null,
  34       creator_id: null,
  35       creator_name: null,
  36       number_of_subscribers: null,
  37       number_of_posts: null,
  38       number_of_comments: null,
  39       published: null
  40     },
  41     moderators: [],
  42     posts: [],
  43     sortType: SortType.Hot,
  44     type_: this.props.communityId
  45     ? ListingType.Community
  46     : UserService.Instance.user
  47     ? ListingType.Subscribed
  48     : ListingType.All,
  49     page: 1,
  50     loading: true
  51   }
  52
  53   constructor(props: any, context: any) {
  54     super(props, context);
  55
  56
  57     this.state = this.emptyState;
  58
  59     this.subscription = WebSocketService.Instance.subject
  60       .pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
  61       .subscribe(
  62         (msg) => this.parseMessage(msg),
  63         (err) => console.error(err),
  64         () => console.log('complete')
  65       );
  66
  67       this.refetch();
  68   }
  69
  70   componentWillUnmount() {
  71     this.subscription.unsubscribe();
  72   }
  73
  74   render() {
  75     return (
  76       <div>
  77         {this.state.loading ?
  78         <h4><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h4> :
  79         <div>
  80           {this.selects()}
  81           {this.state.posts.length > 0
  82             ? this.state.posts.map(post =>
  83               <PostListing post={post} showCommunity={!this.props.communityId}/>)
  84                 : <div>No Listings. {!this.props.communityId && <span>Subscribe to some <Link to="/communities">forums</Link>.</span>}</div>
  85           }
  86           {this.paginator()}
  87         </div>
  88         }
  89       </div>
  90     )
  91   }
  92
  93   selects() {
  94     return (
  95       <div className="mb-2">
  96         <select value={this.state.sortType} onChange={linkEvent(this, this.handleSortChange)} class="custom-select w-auto">
  97           <option disabled>Sort Type</option>
  98           <option value={SortType.Hot}>Hot</option>
  99           <option value={SortType.New}>New</option>
 100           <option disabled>──────────</option>
 101           <option value={SortType.TopDay}>Top Day</option>
 102           <option value={SortType.TopWeek}>Week</option>
 103           <option value={SortType.TopMonth}>Month</option>
 104           <option value={SortType.TopYear}>Year</option>
 105           <option value={SortType.TopAll}>All</option>
 106         </select>
 107         {!this.props.communityId &&
 108           UserService.Instance.user &&
 109             <select value={this.state.type_} onChange={linkEvent(this, this.handleTypeChange)} class="ml-2 custom-select w-auto">
 110               <option disabled>Type</option>
 111               <option value={ListingType.All}>All</option>
 112               <option value={ListingType.Subscribed}>Subscribed</option>
 113             </select>
 114
 115         }
 116       </div>
 117     )
 118   }
 119
 120   paginator() {
 121     return (
 122       <div class="mt-2">
 123         {this.state.page > 1 &&
 124           <button class="btn btn-sm btn-secondary mr-1" onClick={linkEvent(this, this.prevPage)}>Prev</button>
 125         }
 126         <button class="btn btn-sm btn-secondary" onClick={linkEvent(this, this.nextPage)}>Next</button>
 127       </div>
 128     );
 129   }
 130
 131   nextPage(i: PostListings) {
 132     i.state.page++;
 133     i.setState(i.state);
 134     i.refetch();
 135   }
 136
 137   prevPage(i: PostListings) {
 138     i.state.page--;
 139     i.setState(i.state);
 140     i.refetch();
 141   }
 142
 143   handleSortChange(i: PostListings, event: any) {
 144     i.state.sortType = Number(event.target.value);
 145     i.state.page = 1;
 146     i.setState(i.state);
 147     i.refetch();
 148   }
 149
 150   refetch() {
 151     let getPostsForm: GetPostsForm = {
 152       community_id: this.state.community.id,
 153       page: this.state.page,
 154       limit: fetchLimit,
 155       sort: SortType[this.state.sortType],
 156       type_: ListingType[ListingType.Community]
 157     }
 158     WebSocketService.Instance.getPosts(getPostsForm);
 159   }
 160
 161   handleTypeChange(i: PostListings, event: any) {
 162     i.state.type_ = Number(event.target.value);
 163     i.state.page = 1;
 164     i.setState(i.state);
 165     i.refetch();
 166   }
 167
 168   parseMessage(msg: any) {
 169     console.log(msg);
 170     let op: UserOperation = msgOp(msg);
 171     if (msg.error) {
 172       alert(msg.error);
 173       return;
 174     } else if (op == UserOperation.GetPosts) {
 175       let res: GetPostsResponse = msg;
 176       this.state.posts = res.posts;
 177       this.state.loading = false;
 178       this.setState(this.state);
 179     } else if (op == UserOperation.CreatePostLike) {
 180       let res: CreatePostLikeResponse = msg;
 181       let found = this.state.posts.find(c => c.id == res.post.id);
 182       found.my_vote = res.post.my_vote;
 183       found.score = res.post.score;
 184       found.upvotes = res.post.upvotes;
 185       found.downvotes = res.post.downvotes;
 186       this.setState(this.state);
 187     }
 188   }
 189 }
 190
 191