lemmy/ui/src/components/post-listings.tsx

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import { Component, linkEvent } from 'inferno';
import { Link } from 'inferno-router';
import { Subscription } from "rxjs";
import { retryWhen, delay, take } from 'rxjs/operators';
import { UserOperation, Community as CommunityI, Post, GetPostsForm, SortType, ListingType, GetPostsResponse, CreatePostLikeResponse, CommunityUser} from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { PostListing } from './post-listing';
import { msgOp } from '../utils';
interface PostListingsProps {
communityId?: number;
}
interface PostListingsState {
community: CommunityI;
moderators: Array<CommunityUser>;
posts: Array<Post>;
sortType: SortType;
type_: ListingType;
loading: boolean;
}
export class PostListings extends Component<PostListingsProps, PostListingsState> {
private subscription: Subscription;
private emptyState: PostListingsState = {
community: {
id: null,
name: null,
title: null,
category_id: null,
category_name: null,
creator_id: null,
creator_name: null,
number_of_subscribers: null,
number_of_posts: null,
number_of_comments: null,
published: null
},
moderators: [],
posts: [],
sortType: SortType.Hot,
type_: this.props.communityId
? ListingType.Community
: UserService.Instance.loggedIn
? ListingType.Subscribed
: ListingType.All,
loading: true
}
constructor(props: any, context: any) {
super(props, context);
this.state = this.emptyState;
this.subscription = WebSocketService.Instance.subject
.pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
.subscribe(
(msg) => this.parseMessage(msg),
(err) => console.error(err),
() => console.log('complete')
);
let getPostsForm: GetPostsForm = {
type_: ListingType[this.state.type_],
community_id: this.props.communityId,
limit: 10,
sort: SortType[SortType.Hot],
}
WebSocketService.Instance.getPosts(getPostsForm);
}
componentWillUnmount() {
this.subscription.unsubscribe();
}
render() {
return (
<div>
{this.state.loading ?
<h4><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h4> :
<div>
<div>{this.selects()}</div>
{this.state.posts.length > 0
? this.state.posts.map(post =>
<PostListing post={post} showCommunity={!this.props.communityId}/>)
: <div>No Listings. Subscribe to some <Link to="/communities">forums</Link>.</div>
}
</div>
}
</div>
)
}
selects() {
return (
<div className="mb-2">
<select value={this.state.sortType} onChange={linkEvent(this, this.handleSortChange)} class="custom-select w-auto">
<option disabled>Sort Type</option>
<option value={SortType.Hot}>Hot</option>
<option value={SortType.New}>New</option>
<option disabled></option>
<option value={SortType.TopDay}>Top Day</option>
<option value={SortType.TopWeek}>Week</option>
<option value={SortType.TopMonth}>Month</option>
<option value={SortType.TopYear}>Year</option>
<option value={SortType.TopAll}>All</option>
</select>
{!this.props.communityId &&
UserService.Instance.loggedIn &&
<select value={this.state.type_} onChange={linkEvent(this, this.handleTypeChange)} class="ml-2 custom-select w-auto">
<option disabled>Type</option>
<option value={ListingType.All}>All</option>
<option value={ListingType.Subscribed}>Subscribed</option>
</select>
}
</div>
)
}
handleSortChange(i: PostListings, event: any) {
i.state.sortType = Number(event.target.value);
i.setState(i.state);
let getPostsForm: GetPostsForm = {
community_id: i.state.community.id,
limit: 10,
sort: SortType[i.state.sortType],
type_: ListingType[ListingType.Community]
}
WebSocketService.Instance.getPosts(getPostsForm);
}
handleTypeChange(i: PostListings, event: any) {
i.state.type_ = Number(event.target.value);
i.setState(i.state);
let getPostsForm: GetPostsForm = {
limit: 10,
sort: SortType[i.state.sortType],
type_: ListingType[i.state.type_]
}
WebSocketService.Instance.getPosts(getPostsForm);
}
parseMessage(msg: any) {
console.log(msg);
let op: UserOperation = msgOp(msg);
if (msg.error) {
alert(msg.error);
return;
} else if (op == UserOperation.GetPosts) {
let res: GetPostsResponse = msg;
this.state.posts = res.posts;
this.state.loading = false;
this.setState(this.state);
} else if (op == UserOperation.CreatePostLike) {
let res: CreatePostLikeResponse = msg;
let found = this.state.posts.find(c => c.id == res.post.id);
found.my_vote = res.post.my_vote;
found.score = res.post.score;
found.upvotes = res.post.upvotes;
found.downvotes = res.post.downvotes;
this.setState(this.state);
}
}
}