src/shared/components/post/post-listings.tsx

   1 import { Component } from "inferno";
   2 import { T } from "inferno-i18next-dess";
   3 import { Link } from "inferno-router";
   4 import {
   5   AddAdmin,
   6   AddModToCommunity,
   7   BanFromCommunity,
   8   BanPerson,
   9   BlockPerson,
  10   CreatePostLike,
  11   CreatePostReport,
  12   DeletePost,
  13   EditPost,
  14   FeaturePost,
  15   Language,
  16   LockPost,
  17   PostView,
  18   PurgePerson,
  19   PurgePost,
  20   RemovePost,
  21   SavePost,
  22   TransferCommunity,
  23 } from "lemmy-js-client";
  24 import { i18n } from "../../i18next";
  25 import { PostListing } from "./post-listing";
  26
  27 interface PostListingsProps {
  28   posts: PostView[];
  29   allLanguages: Language[];
  30   siteLanguages: number[];
  31   showCommunity?: boolean;
  32   removeDuplicates?: boolean;
  33   enableDownvotes?: boolean;
  34   enableNsfw?: boolean;
  35   viewOnly?: boolean;
  36   onPostEdit(form: EditPost): void;
  37   onPostVote(form: CreatePostLike): void;
  38   onPostReport(form: CreatePostReport): void;
  39   onBlockPerson(form: BlockPerson): void;
  40   onLockPost(form: LockPost): void;
  41   onDeletePost(form: DeletePost): void;
  42   onRemovePost(form: RemovePost): void;
  43   onSavePost(form: SavePost): void;
  44   onFeaturePost(form: FeaturePost): void;
  45   onPurgePerson(form: PurgePerson): void;
  46   onPurgePost(form: PurgePost): void;
  47   onBanPersonFromCommunity(form: BanFromCommunity): void;
  48   onBanPerson(form: BanPerson): void;
  49   onAddModToCommunity(form: AddModToCommunity): void;
  50   onAddAdmin(form: AddAdmin): void;
  51   onTransferCommunity(form: TransferCommunity): void;
  52 }
  53
  54 export class PostListings extends Component<PostListingsProps, any> {
  55   duplicatesMap = new Map<number, PostView[]>();
  56
  57   constructor(props: any, context: any) {
  58     super(props, context);
  59   }
  60
  61   get posts() {
  62     return this.props.removeDuplicates
  63       ? this.removeDuplicates()
  64       : this.props.posts;
  65   }
  66
  67   render() {
  68     return (
  69       <div className="post-listings">
  70         {this.posts.length > 0 ? (
  71           this.posts.map((post_view, idx) => (
  72             <>
  73               <PostListing
  74                 post_view={post_view}
  75                 crossPosts={this.duplicatesMap.get(post_view.post.id)}
  76                 showCommunity={this.props.showCommunity}
  77                 enableDownvotes={this.props.enableDownvotes}
  78                 enableNsfw={this.props.enableNsfw}
  79                 viewOnly={this.props.viewOnly}
  80                 allLanguages={this.props.allLanguages}
  81                 siteLanguages={this.props.siteLanguages}
  82                 onPostEdit={this.props.onPostEdit}
  83                 onPostVote={this.props.onPostVote}
  84                 onPostReport={this.props.onPostReport}
  85                 onBlockPerson={this.props.onBlockPerson}
  86                 onLockPost={this.props.onLockPost}
  87                 onDeletePost={this.props.onDeletePost}
  88                 onRemovePost={this.props.onRemovePost}
  89                 onSavePost={this.props.onSavePost}
  90                 onFeaturePost={this.props.onFeaturePost}
  91                 onPurgePerson={this.props.onPurgePerson}
  92                 onPurgePost={this.props.onPurgePost}
  93                 onBanPersonFromCommunity={this.props.onBanPersonFromCommunity}
  94                 onBanPerson={this.props.onBanPerson}
  95                 onAddModToCommunity={this.props.onAddModToCommunity}
  96                 onAddAdmin={this.props.onAddAdmin}
  97                 onTransferCommunity={this.props.onTransferCommunity}
  98               />
  99               {idx + 1 !== this.posts.length && <hr className="my-3" />}
 100             </>
 101           ))
 102         ) : (
 103           <>
 104             <div>{i18n.t("no_posts")}</div>
 105             {this.props.showCommunity && (
 106               <T i18nKey="subscribe_to_communities">
 107                 #<Link to="/communities">#</Link>
 108               </T>
 109             )}
 110           </>
 111         )}
 112       </div>
 113     );
 114   }
 115
 116   removeDuplicates(): PostView[] {
 117     // Must use a spread to clone the props, because splice will fail below otherwise.
 118     const posts = [...this.props.posts].filter(empty => empty);
 119
 120     // A map from post url to list of posts (dupes)
 121     const urlMap = new Map<string, PostView[]>();
 122
 123     // Loop over the posts, find ones with same urls
 124     for (const pv of posts) {
 125       const url = pv.post.url;
 126       if (
 127         !pv.post.deleted &&
 128         !pv.post.removed &&
 129         !pv.community.deleted &&
 130         !pv.community.removed &&
 131         url
 132       ) {
 133         if (!urlMap.get(url)) {
 134           urlMap.set(url, [pv]);
 135         } else {
 136           urlMap.get(url)?.push(pv);
 137         }
 138       }
 139     }
 140
 141     // Sort by oldest
 142     // Remove the ones that have no length
 143     for (const e of urlMap.entries()) {
 144       if (e[1].length == 1) {
 145         urlMap.delete(e[0]);
 146       } else {
 147         e[1].sort((a, b) => a.post.published.localeCompare(b.post.published));
 148       }
 149     }
 150
 151     for (let i = 0; i < posts.length; i++) {
 152       const pv = posts[i];
 153       const url = pv.post.url;
 154       if (url) {
 155         const found = urlMap.get(url);
 156         if (found) {
 157           // If its the oldest, add
 158           if (pv.post.id == found[0].post.id) {
 159             this.duplicatesMap.set(pv.post.id, found.slice(1));
 160           }
 161           // Otherwise, delete it
 162           else {
 163             posts.splice(i--, 1);
 164           }
 165         }
 166       }
 167     }
 168
 169     return posts;
 170   }
 171 }