ui/src/components/community.tsx

   1 import { Component, linkEvent } from 'inferno';
   2 import { Subscription } from "rxjs";
   3 import { retryWhen, delay, take } from 'rxjs/operators';
   4 import { UserOperation, Community as CommunityI, GetCommunityResponse, CommunityResponse,  CommunityUser, UserView, SortType, Post, GetPostsForm, ListingType, GetPostsResponse, CreatePostLikeResponse } from '../interfaces';
   5 import { WebSocketService } from '../services';
   6 import { PostListings } from './post-listings';
   7 import { Sidebar } from './sidebar';
   8 import { msgOp, routeSortTypeToEnum, fetchLimit, postRefetchSeconds } from '../utils';
   9 import { T, i18n } from 'inferno-i18next';
  10
  11 interface State {
  12   community: CommunityI;
  13   communityId: number;
  14   communityName: string;
  15   moderators: Array<CommunityUser>;
  16   admins: Array<UserView>;
  17   loading: boolean;
  18   posts: Array<Post>;
  19   sort: SortType;
  20   page: number;
  21 }
  22
  23 export class Community extends Component<any, State> {
  24
  25   private subscription: Subscription;
  26   private postFetcher: any;
  27   private emptyState: State = {
  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       removed: null,
  41       nsfw: false,
  42       deleted: null,
  43     },
  44     moderators: [],
  45     admins: [],
  46     communityId: Number(this.props.match.params.id),
  47     communityName: this.props.match.params.name,
  48     loading: true,
  49     posts: [],
  50     sort: this.getSortTypeFromProps(this.props),
  51     page: this.getPageFromProps(this.props),
  52   }
  53
  54   getSortTypeFromProps(props: any): SortType {
  55     return (props.match.params.sort) ?
  56       routeSortTypeToEnum(props.match.params.sort) :
  57       SortType.Hot;
  58   }
  59
  60   getPageFromProps(props: any): number {
  61     return (props.match.params.page) ? Number(props.match.params.page) : 1;
  62   }
  63
  64   constructor(props: any, context: any) {
  65     super(props, context);
  66
  67     this.state = this.emptyState;
  68
  69     this.subscription = WebSocketService.Instance.subject
  70     .pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
  71     .subscribe(
  72       (msg) => this.parseMessage(msg),
  73         (err) => console.error(err),
  74         () => console.log('complete')
  75     );
  76
  77     if (this.state.communityId) {
  78       WebSocketService.Instance.getCommunity(this.state.communityId);
  79     } else if (this.state.communityName) {
  80       WebSocketService.Instance.getCommunityByName(this.state.communityName);
  81     }
  82
  83     this.keepFetchingPosts();
  84   }
  85
  86   componentWillUnmount() {
  87     this.subscription.unsubscribe();
  88     clearInterval(this.postFetcher);
  89   }
  90
  91   // Necessary for back button for some reason
  92   componentWillReceiveProps(nextProps: any) {
  93     if (nextProps.history.action == 'POP') {
  94       this.state = this.emptyState;
  95       this.state.sort = this.getSortTypeFromProps(nextProps);
  96       this.state.page = this.getPageFromProps(nextProps);
  97       this.fetchPosts();
  98     }
  99   }
 100
 101   render() {
 102     return (
 103       <div class="container">
 104         {this.state.loading ?
 105         <h5><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h5> :
 106         <div class="row">
 107           <div class="col-12 col-md-8">
 108             <h5>{this.state.community.title}
 109             {this.state.community.removed &&
 110               <small className="ml-2 text-muted font-italic"><T i18nKey="removed">#</T></small>
 111             }
 112             {this.state.community.nsfw &&
 113               <small className="ml-2 text-muted font-italic"><T i18nKey="nsfw">#</T></small>
 114             }
 115           </h5>
 116           {this.selects()}
 117           <PostListings posts={this.state.posts} />
 118           {this.paginator()}
 119           </div>
 120           <div class="col-12 col-md-4">
 121             <Sidebar
 122               community={this.state.community}
 123               moderators={this.state.moderators}
 124               admins={this.state.admins}
 125             />
 126           </div>
 127         </div>
 128         }
 129       </div>
 130     )
 131   }
 132
 133   selects() {
 134     return (
 135       <div className="mb-2">
 136         <select value={this.state.sort} onChange={linkEvent(this, this.handleSortChange)} class="custom-select custom-select-sm w-auto">
 137           <option disabled><T i18nKey="sort_type">#</T></option>
 138           <option value={SortType.Hot}><T i18nKey="hot">#</T></option>
 139           <option value={SortType.New}><T i18nKey="new">#</T></option>
 140           <option disabled>──────</option>
 141           <option value={SortType.TopDay}><T i18nKey="top_day">#</T></option>
 142           <option value={SortType.TopWeek}><T i18nKey="week">#</T></option>
 143           <option value={SortType.TopMonth}><T i18nKey="month">#</T></option>
 144           <option value={SortType.TopYear}><T i18nKey="year">#</T></option>
 145           <option value={SortType.TopAll}><T i18nKey="all">#</T></option>
 146         </select>
 147       </div>
 148     )
 149   }
 150
 151   paginator() {
 152     return (
 153       <div class="my-2">
 154         {this.state.page > 1 &&
 155           <button class="btn btn-sm btn-secondary mr-1" onClick={linkEvent(this, this.prevPage)}><T i18nKey="prev">#</T></button>
 156         }
 157         <button class="btn btn-sm btn-secondary" onClick={linkEvent(this, this.nextPage)}><T i18nKey="next">#</T></button>
 158       </div>
 159     );
 160   }
 161
 162   nextPage(i: Community) {
 163     i.state.page++;
 164     i.setState(i.state);
 165     i.updateUrl();
 166     i.fetchPosts();
 167     window.scrollTo(0,0);
 168   }
 169
 170   prevPage(i: Community) {
 171     i.state.page--;
 172     i.setState(i.state);
 173     i.updateUrl();
 174     i.fetchPosts();
 175     window.scrollTo(0,0);
 176   }
 177
 178   handleSortChange(i: Community, event: any) {
 179     i.state.sort = Number(event.target.value);
 180     i.state.page = 1;
 181     i.setState(i.state);
 182     i.updateUrl();
 183     i.fetchPosts();
 184     window.scrollTo(0,0);
 185   }
 186
 187   updateUrl() {
 188     let sortStr = SortType[this.state.sort].toLowerCase();
 189     this.props.history.push(`/c/${this.state.community.name}/sort/${sortStr}/page/${this.state.page}`);
 190   }
 191
 192   keepFetchingPosts() {
 193     this.fetchPosts();
 194     this.postFetcher = setInterval(() => this.fetchPosts(), postRefetchSeconds);
 195   }
 196
 197   fetchPosts() {
 198     let getPostsForm: GetPostsForm = {
 199       page: this.state.page,
 200       limit: fetchLimit,
 201       sort: SortType[this.state.sort],
 202       type_: ListingType[ListingType.Community],
 203       community_id: this.state.community.id,
 204     }
 205     WebSocketService.Instance.getPosts(getPostsForm);
 206   }
 207
 208   parseMessage(msg: any) {
 209     console.log(msg);
 210     let op: UserOperation = msgOp(msg);
 211     if (msg.error) {
 212       alert(i18n.t(msg.error));
 213       return;
 214     } else if (op == UserOperation.GetCommunity) {
 215       let res: GetCommunityResponse = msg;
 216       this.state.community = res.community;
 217       this.state.moderators = res.moderators;
 218       this.state.admins = res.admins;
 219       document.title = `/c/${this.state.community.name} - ${WebSocketService.Instance.site.name}`;
 220       this.setState(this.state);
 221       this.fetchPosts();
 222     } else if (op == UserOperation.EditCommunity) {
 223       let res: CommunityResponse = msg;
 224       this.state.community = res.community;
 225       this.setState(this.state);
 226     } else if (op == UserOperation.FollowCommunity) {
 227       let res: CommunityResponse = msg;
 228       this.state.community.subscribed = res.community.subscribed;
 229       this.state.community.number_of_subscribers = res.community.number_of_subscribers;
 230       this.setState(this.state);
 231     } else if (op == UserOperation.GetPosts) {
 232       let res: GetPostsResponse = msg;
 233       this.state.posts = res.posts;
 234       this.state.loading = false;
 235       this.setState(this.state);
 236     } else if (op == UserOperation.CreatePostLike) {
 237       let res: CreatePostLikeResponse = msg;
 238       let found = this.state.posts.find(c => c.id == res.post.id);
 239       found.my_vote = res.post.my_vote;
 240       found.score = res.post.score;
 241       found.upvotes = res.post.upvotes;
 242       found.downvotes = res.post.downvotes;
 243       this.setState(this.state);
 244     }
 245   }
 246 }
 247