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';
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import { UserOperation, Post, GetPostsForm, SortType, ListingType, GetPostsResponse, CreatePostLikeResponse, CommunityUser} from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { PostListing } from './post-listing';
import { msgOp, fetchLimit } from '../utils';
interface PostListingsProps {
communityId?: number;
}
interface PostListingsState {
moderators: Array<CommunityUser>;
posts: Array<Post>;
sortType: SortType;
type_: ListingType;
page: number;
loading: boolean;
}
export class PostListings extends Component<PostListingsProps, PostListingsState> {
private subscription: Subscription;
private emptyState: PostListingsState = {
moderators: [],
posts: [],
sortType: SortType.Hot,
type_: this.props.communityId
? ListingType.Community
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: UserService.Instance.user
? ListingType.Subscribed
: ListingType.All,
page: 1,
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')
);
this.refetch();
}
componentWillUnmount() {
this.subscription.unsubscribe();
}
render() {
return (
<div>
{this.state.loading ?
<h5><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h5> :
<div>
{this.selects()}
{this.state.posts.length > 0
? this.state.posts.map(post =>
<PostListing post={post} showCommunity={!this.props.communityId}/>)
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: <div>No Listings. {!this.props.communityId && <span>Subscribe to some <Link to="/communities">forums</Link>.</span>}</div>
}
{this.paginator()}
</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 &&
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UserService.Instance.user &&
<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>
)
}
paginator() {
return (
<div class="mt-2">
{this.state.page > 1 &&
<button class="btn btn-sm btn-secondary mr-1" onClick={linkEvent(this, this.prevPage)}>Prev</button>
}
<button class="btn btn-sm btn-secondary" onClick={linkEvent(this, this.nextPage)}>Next</button>
</div>
);
}
nextPage(i: PostListings) {
i.state.page++;
i.setState(i.state);
i.refetch();
}
prevPage(i: PostListings) {
i.state.page--;
i.setState(i.state);
i.refetch();
}
handleSortChange(i: PostListings, event: any) {
i.state.sortType = Number(event.target.value);
i.state.page = 1;
i.setState(i.state);
i.refetch();
}
refetch() {
let getPostsForm: GetPostsForm = {
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community_id: this.props.communityId,
page: this.state.page,
limit: fetchLimit,
sort: SortType[this.state.sortType],
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type_: ListingType[this.state.type_]
}
WebSocketService.Instance.getPosts(getPostsForm);
}
handleTypeChange(i: PostListings, event: any) {
i.state.type_ = Number(event.target.value);
i.state.page = 1;
i.setState(i.state);
i.refetch();
}
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);
}
}
}