lemmy/ui/src/components/post.tsx

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import { Component, linkEvent } from 'inferno';
import { Subscription } from "rxjs";
import { retryWhen, delay, take } from 'rxjs/operators';
import { UserOperation, Community, Post as PostI, GetPostResponse, PostResponse, Comment, CommentForm as CommentFormI, CommentResponse, CommentSortType, CreatePostLikeResponse, CommunityUser, CommunityResponse, CommentNode as CommentNodeI, BanFromCommunityResponse, BanUserResponse, AddModToCommunityResponse, AddAdminResponse, UserView, SearchType, SortType, SearchForm, SearchResponse, GetSiteResponse, GetCommunityResponse } from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { msgOp, hotRank } from '../utils';
import { PostListing } from './post-listing';
import { PostListings } from './post-listings';
import { Sidebar } from './sidebar';
import { CommentForm } from './comment-form';
import { CommentNodes } from './comment-nodes';
import * as autosize from 'autosize';
import { i18n } from '../i18next';
import { T } from 'inferno-i18next';
interface PostState {
post: PostI;
comments: Array<Comment>;
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commentSort: CommentSortType;
community: Community;
moderators: Array<CommunityUser>;
admins: Array<UserView>;
scrolled?: boolean;
scrolled_comment_id?: number;
loading: boolean;
crossPosts: Array<PostI>;
}
export class Post extends Component<any, PostState> {
private subscription: Subscription;
private emptyState: PostState = {
post: null,
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comments: [],
commentSort: CommentSortType.Hot,
community: null,
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moderators: [],
admins: [],
scrolled: false,
loading: true,
crossPosts: [],
}
constructor(props: any, context: any) {
super(props, context);
this.state = this.emptyState;
let postId = Number(this.props.match.params.id);
if (this.props.match.params.comment_id) {
this.state.scrolled_comment_id = this.props.match.params.comment_id;
}
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')
);
WebSocketService.Instance.getPost(postId);
}
componentWillUnmount() {
this.subscription.unsubscribe();
}
componentDidMount() {
autosize(document.querySelectorAll('textarea'));
}
componentDidUpdate(_lastProps: any, lastState: PostState, _snapshot: any) {
if (this.state.scrolled_comment_id && !this.state.scrolled && lastState.comments.length > 0) {
var elmnt = document.getElementById(`comment-${this.state.scrolled_comment_id}`);
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elmnt.scrollIntoView();
elmnt.classList.add("mark-two");
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this.state.scrolled = true;
this.markScrolledAsRead(this.state.scrolled_comment_id);
}
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// Necessary if you are on a post and you click another post (same route)
if (_lastProps.location.pathname !== _lastProps.history.location.pathname) {
// Couldnt get a refresh working. This does for now.
location.reload();
// let currentId = this.props.match.params.id;
// WebSocketService.Instance.getPost(currentId);
// this.context.router.history.push('/sponsors');
// this.context.refresh();
// this.context.router.history.push(_lastProps.location.pathname);
}
}
markScrolledAsRead(commentId: number) {
let found = this.state.comments.find(c => c.id == commentId);
let parent = this.state.comments.find(c => found.parent_id == c.id);
let parent_user_id = parent ? parent.creator_id : this.state.post.creator_id;
if (UserService.Instance.user && UserService.Instance.user.id == parent_user_id) {
let form: CommentFormI = {
content: found.content,
edit_id: found.id,
creator_id: found.creator_id,
post_id: found.post_id,
parent_id: found.parent_id,
read: true,
auth: null
};
WebSocketService.Instance.editComment(form);
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}
}
render() {
return (
<div class="container">
{this.state.loading ?
<h5><svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg></h5> :
<div class="row">
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<div class="col-12 col-md-8 mb-3">
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<PostListing
post={this.state.post}
showBody
showCommunity
editable
moderators={this.state.moderators}
admins={this.state.admins}
/>
{this.state.crossPosts.length > 0 &&
<>
<div class="my-1 text-muted small font-weight-bold"><T i18nKey="cross_posts">#</T></div>
<PostListings showCommunity posts={this.state.crossPosts} />
</>
}
<div className="mb-2" />
<CommentForm postId={this.state.post.id} disabled={this.state.post.locked} />
{this.sortRadios()}
{this.commentsTree()}
</div>
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<div class="col-12 col-sm-12 col-md-4">
{this.sidebar()}
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{this.state.comments.length > 0 && this.newComments()}
</div>
</div>
}
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</div>
)
}
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sortRadios() {
return (
<div class="btn-group btn-group-toggle mb-3">
<label className={`btn btn-sm btn-secondary pointer ${this.state.commentSort === CommentSortType.Hot && 'active'}`}>{i18n.t('hot')}
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<input type="radio" value={CommentSortType.Hot}
checked={this.state.commentSort === CommentSortType.Hot}
onChange={linkEvent(this, this.handleCommentSortChange)} />
</label>
<label className={`btn btn-sm btn-secondary pointer ${this.state.commentSort === CommentSortType.Top && 'active'}`}>{i18n.t('top')}
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<input type="radio" value={CommentSortType.Top}
checked={this.state.commentSort === CommentSortType.Top}
onChange={linkEvent(this, this.handleCommentSortChange)} />
</label>
<label className={`btn btn-sm btn-secondary pointer ${this.state.commentSort === CommentSortType.New && 'active'}`}>{i18n.t('new')}
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<input type="radio" value={CommentSortType.New}
checked={this.state.commentSort === CommentSortType.New}
onChange={linkEvent(this, this.handleCommentSortChange)} />
</label>
</div>
)
}
newComments() {
return (
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<div class="d-none d-md-block sticky-top new-comments card border-secondary">
<div class="card-body small">
<h6><T i18nKey="recent_comments">#</T></h6>
{this.state.comments.map(comment =>
<CommentNodes
nodes={[{comment: comment}]}
noIndent
locked={this.state.post.locked}
moderators={this.state.moderators}
admins={this.state.admins}
/>
)}
</div>
</div>
)
}
sidebar() {
return (
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<div class="mb-3">
<Sidebar
community={this.state.community}
moderators={this.state.moderators}
admins={this.state.admins}
/>
</div>
);
}
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handleCommentSortChange(i: Post, event: any) {
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i.state.commentSort = Number(event.target.value);
i.setState(i.state);
}
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private buildCommentsTree(): Array<CommentNodeI> {
let map = new Map<number, CommentNodeI>();
for (let comment of this.state.comments) {
let node: CommentNodeI = {
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comment: comment,
children: []
};
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map.set(comment.id, { ...node });
}
let tree: Array<CommentNodeI> = [];
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for (let comment of this.state.comments) {
if( comment.parent_id ) {
map.get(comment.parent_id).children.push(map.get(comment.id));
}
else {
tree.push(map.get(comment.id));
}
}
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this.sortTree(tree);
return tree;
}
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sortTree(tree: Array<CommentNodeI>) {
if (this.state.commentSort == CommentSortType.Top) {
tree.sort((a, b) => b.comment.score - a.comment.score);
} else if (this.state.commentSort == CommentSortType.New) {
tree.sort((a, b) => b.comment.published.localeCompare(a.comment.published));
} else if (this.state.commentSort == CommentSortType.Hot) {
tree.sort((a, b) => hotRank(b.comment) - hotRank(a.comment));
}
for (let node of tree) {
this.sortTree(node.children);
}
}
commentsTree() {
let nodes = this.buildCommentsTree();
return (
<div>
<CommentNodes
nodes={nodes}
locked={this.state.post.locked}
moderators={this.state.moderators}
admins={this.state.admins}
/>
</div>
);
}
parseMessage(msg: any) {
console.log(msg);
let op: UserOperation = msgOp(msg);
if (msg.error) {
alert(i18n.t(msg.error));
return;
} else if (op == UserOperation.GetPost) {
let res: GetPostResponse = msg;
this.state.post = res.post;
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this.state.comments = res.comments;
this.state.community = res.community;
this.state.moderators = res.moderators;
this.state.admins = res.admins;
this.state.loading = false;
document.title = `${this.state.post.name} - ${WebSocketService.Instance.site.name}`;
// Get cross-posts
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if (this.state.post.url) {
let form: SearchForm = {
q: this.state.post.url,
type_: SearchType[SearchType.Url],
sort: SortType[SortType.TopAll],
page: 1,
limit: 6,
};
WebSocketService.Instance.search(form);
}
this.setState(this.state);
} else if (op == UserOperation.CreateComment) {
let res: CommentResponse = msg;
this.state.comments.unshift(res.comment);
this.setState(this.state);
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} else if (op == UserOperation.EditComment) {
let res: CommentResponse = msg;
let found = this.state.comments.find(c => c.id == res.comment.id);
found.content = res.comment.content;
found.updated = res.comment.updated;
found.removed = res.comment.removed;
found.deleted = res.comment.deleted;
found.upvotes = res.comment.upvotes;
found.downvotes = res.comment.downvotes;
found.score = res.comment.score;
found.read = res.comment.read;
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this.setState(this.state);
} else if (op == UserOperation.SaveComment) {
let res: CommentResponse = msg;
let found = this.state.comments.find(c => c.id == res.comment.id);
found.saved = res.comment.saved;
this.setState(this.state);
} else if (op == UserOperation.CreateCommentLike) {
let res: CommentResponse = msg;
let found: Comment = this.state.comments.find(c => c.id === res.comment.id);
found.score = res.comment.score;
found.upvotes = res.comment.upvotes;
found.downvotes = res.comment.downvotes;
if (res.comment.my_vote !== null)
found.my_vote = res.comment.my_vote;
this.setState(this.state);
} else if (op == UserOperation.CreatePostLike) {
let res: CreatePostLikeResponse = msg;
this.state.post.my_vote = res.post.my_vote;
this.state.post.score = res.post.score;
this.state.post.upvotes = res.post.upvotes;
this.state.post.downvotes = res.post.downvotes;
this.setState(this.state);
} else if (op == UserOperation.EditPost) {
let res: PostResponse = msg;
this.state.post = res.post;
this.setState(this.state);
} else if (op == UserOperation.SavePost) {
let res: PostResponse = msg;
this.state.post = res.post;
this.setState(this.state);
} else if (op == UserOperation.EditCommunity) {
let res: CommunityResponse = msg;
this.state.community = res.community;
this.state.post.community_id = res.community.id;
this.state.post.community_name = res.community.name;
this.setState(this.state);
} else if (op == UserOperation.FollowCommunity) {
let res: CommunityResponse = msg;
this.state.community.subscribed = res.community.subscribed;
this.state.community.number_of_subscribers = res.community.number_of_subscribers;
this.setState(this.state);
} else if (op == UserOperation.BanFromCommunity) {
let res: BanFromCommunityResponse = msg;
this.state.comments.filter(c => c.creator_id == res.user.id)
.forEach(c => c.banned_from_community = res.banned);
this.setState(this.state);
} else if (op == UserOperation.AddModToCommunity) {
let res: AddModToCommunityResponse = msg;
this.state.moderators = res.moderators;
this.setState(this.state);
} else if (op == UserOperation.BanUser) {
let res: BanUserResponse = msg;
this.state.comments.filter(c => c.creator_id == res.user.id)
.forEach(c => c.banned = res.banned);
this.setState(this.state);
} else if (op == UserOperation.AddAdmin) {
let res: AddAdminResponse = msg;
this.state.admins = res.admins;
this.setState(this.state);
} else if (op == UserOperation.Search) {
let res: SearchResponse = msg;
this.state.crossPosts = res.posts.filter(p => p.id != this.state.post.id);
this.setState(this.state);
} else if (op == UserOperation.TransferSite) {
let res: GetSiteResponse = msg;
this.state.admins = res.admins;
this.setState(this.state);
} else if (op == UserOperation.TransferCommunity) {
let res: GetCommunityResponse = msg;
this.state.community = res.community;
this.state.moderators = res.moderators;
this.state.admins = res.admins;
this.setState(this.state);
}
}
}
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