lemmy/ui/src/components/post.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, Post as PostI, GetPostResponse, PostResponse, Comment, CommentForm as CommentFormI, CommentResponse, CommentLikeForm, CommentSortType, CreatePostLikeResponse } from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { msgOp, hotRank,mdToHtml } from '../utils';
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import { MomentTime } from './moment-time';
import { PostListing } from './post-listing';
import { Sidebar } from './sidebar';
import * as autosize from 'autosize';
interface CommentNodeI {
comment: Comment;
children?: Array<CommentNodeI>;
};
interface PostState {
post: PostI;
comments: Array<Comment>;
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commentSort: CommentSortType;
community: Community;
}
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,
}
constructor(props, context) {
super(props, context);
this.state = this.emptyState;
let postId = Number(this.props.match.params.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'));
}
render() {
return (
<div class="container">
{this.state.post &&
<div class="row">
<div class="col-12 col-sm-8 col-lg-7 mb-3">
<PostListing post={this.state.post} showBody showCommunity editable />
<div className="mb-2" />
<CommentForm postId={this.state.post.id} />
{this.sortRadios()}
{this.commentsTree()}
</div>
<div class="col-12 col-sm-4 col-lg-3 mb-3">
{this.state.comments.length > 0 && this.newComments()}
</div>
<div class="col-12 col-sm-12 col-lg-2">
{this.sidebar()}
</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 ${this.state.commentSort === CommentSortType.Hot && 'active'}`}>Hot
<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 ${this.state.commentSort === CommentSortType.Top && 'active'}`}>Top
<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 ${this.state.commentSort === CommentSortType.New && 'active'}`}>New
<input type="radio" value={CommentSortType.New}
checked={this.state.commentSort === CommentSortType.New}
onChange={linkEvent(this, this.handleCommentSortChange)} />
</label>
</div>
)
}
newComments() {
return (
<div class="sticky-top">
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<h5>New Comments</h5>
{this.state.comments.map(comment =>
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<CommentNodes nodes={[{comment: comment}]} noIndent />
)}
</div>
)
}
sidebar() {
return (
<div class="sticky-top">
<Sidebar community={this.state.community} />
</div>
);
}
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handleCommentSortChange(i: Post, event) {
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 (
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<div className="">
<CommentNodes nodes={nodes} />
</div>
);
}
parseMessage(msg: any) {
console.log(msg);
let op: UserOperation = msgOp(msg);
if (msg.error) {
alert(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.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;
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);
}
}
}
interface CommentNodesState {
}
interface CommentNodesProps {
nodes: Array<CommentNodeI>;
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noIndent?: boolean;
}
export class CommentNodes extends Component<CommentNodesProps, CommentNodesState> {
constructor(props, context) {
super(props, context);
}
render() {
return (
<div className="comments">
{this.props.nodes.map(node =>
<CommentNode node={node} noIndent={this.props.noIndent} />
)}
</div>
)
}
}
interface CommentNodeState {
showReply: boolean;
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showEdit: boolean;
}
interface CommentNodeProps {
node: CommentNodeI;
noIndent?: boolean;
}
export class CommentNode extends Component<CommentNodeProps, CommentNodeState> {
private emptyState: CommentNodeState = {
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showReply: false,
showEdit: false
}
constructor(props, context) {
super(props, context);
this.state = this.emptyState;
this.handleReplyCancel = this.handleReplyCancel.bind(this);
this.handleCommentLike = this.handleCommentLike.bind(this);
this.handleCommentDisLike = this.handleCommentDisLike.bind(this);
}
render() {
let node = this.props.node;
return (
<div className={`comment ${node.comment.parent_id && !this.props.noIndent ? 'ml-4' : ''}`}>
<div className="float-left small text-center">
<div className={`pointer upvote ${node.comment.my_vote == 1 ? 'text-info' : 'text-muted'}`} onClick={linkEvent(node, this.handleCommentLike)}></div>
<div>{node.comment.score}</div>
<div className={`pointer downvote ${node.comment.my_vote == -1 && 'text-danger'}`} onClick={linkEvent(node, this.handleCommentDisLike)}></div>
</div>
<div className="details ml-4">
<ul class="list-inline mb-0 text-muted small">
<li className="list-inline-item">
<Link to={`/user/${node.comment.creator_id}`}>{node.comment.creator_name}</Link>
</li>
<li className="list-inline-item">
<span>(
<span className="text-info">+{node.comment.upvotes}</span>
<span> | </span>
<span className="text-danger">-{node.comment.downvotes}</span>
<span>) </span>
</span>
</li>
<li className="list-inline-item">
<span><MomentTime data={node.comment} /></span>
</li>
</ul>
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{this.state.showEdit && <CommentForm node={node} edit onReplyCancel={this.handleReplyCancel} />}
{!this.state.showEdit &&
<div>
<div className="md-div" dangerouslySetInnerHTML={mdToHtml(node.comment.content)} />
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<ul class="list-inline mb-1 text-muted small font-weight-bold">
<li className="list-inline-item">
<span class="pointer" onClick={linkEvent(this, this.handleReplyClick)}>reply</span>
</li>
{this.myComment &&
<li className="list-inline-item">
<span class="pointer" onClick={linkEvent(this, this.handleEditClick)}>edit</span>
</li>
}
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{this.myComment &&
<li className="list-inline-item">
<span class="pointer" onClick={linkEvent(this, this.handleDeleteClick)}>delete</span>
</li>
}
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<li className="list-inline-item">
<a className="text-muted" href="test">link</a>
</li>
</ul>
</div>
}
</div>
{this.state.showReply && <CommentForm node={node} onReplyCancel={this.handleReplyCancel} />}
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{this.props.node.children && <CommentNodes nodes={this.props.node.children} />}
</div>
)
}
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private get myComment(): boolean {
return UserService.Instance.loggedIn && this.props.node.comment.creator_id == UserService.Instance.user.id;
}
handleReplyClick(i: CommentNode, event) {
i.state.showReply = true;
i.setState(i.state);
}
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handleEditClick(i: CommentNode, event) {
i.state.showEdit = true;
i.setState(i.state);
}
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handleDeleteClick(i: CommentNode, event) {
let deleteForm: CommentFormI = {
content: "*deleted*",
edit_id: i.props.node.comment.id,
post_id: i.props.node.comment.post_id,
parent_id: i.props.node.comment.parent_id,
auth: null
};
WebSocketService.Instance.editComment(deleteForm);
}
handleReplyCancel(): any {
this.state.showReply = false;
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this.state.showEdit = false;
this.setState(this.state);
}
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handleCommentLike(i: CommentNodeI, event) {
let form: CommentLikeForm = {
comment_id: i.comment.id,
post_id: i.comment.post_id,
score: (i.comment.my_vote == 1) ? 0 : 1
};
WebSocketService.Instance.likeComment(form);
}
handleCommentDisLike(i: CommentNodeI, event) {
let form: CommentLikeForm = {
comment_id: i.comment.id,
post_id: i.comment.post_id,
score: (i.comment.my_vote == -1) ? 0 : -1
};
WebSocketService.Instance.likeComment(form);
}
}
interface CommentFormProps {
postId?: number;
node?: CommentNodeI;
onReplyCancel?();
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edit?: boolean;
}
interface CommentFormState {
commentForm: CommentFormI;
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buttonTitle: string;
}
export class CommentForm extends Component<CommentFormProps, CommentFormState> {
private emptyState: CommentFormState = {
commentForm: {
auth: null,
content: null,
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post_id: this.props.node ? this.props.node.comment.post_id : this.props.postId
},
buttonTitle: !this.props.node ? "Post" : this.props.edit ? "Edit" : "Reply"
}
constructor(props, context) {
super(props, context);
this.state = this.emptyState;
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if (this.props.node) {
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if (this.props.edit) {
this.state.commentForm.edit_id = this.props.node.comment.id;
this.state.commentForm.parent_id = this.props.node.comment.parent_id;
this.state.commentForm.content = this.props.node.comment.content;
} else {
// A reply gets a new parent id
this.state.commentForm.parent_id = this.props.node.comment.id;
}
}
}
componentDidMount() {
autosize(document.querySelectorAll('textarea'));
}
render() {
return (
<div>
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<form onSubmit={linkEvent(this, this.handleCommentSubmit)}>
<div class="form-group row">
<div class="col-sm-12">
<textarea class="form-control" value={this.state.commentForm.content} onInput={linkEvent(this, this.handleCommentContentChange)} placeholder="Comment here" required />
</div>
</div>
<div class="row">
<div class="col-sm-12">
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<button type="submit" class="btn btn-sm btn-secondary mr-2">{this.state.buttonTitle}</button>
{this.props.node && <button type="button" class="btn btn-sm btn-secondary" onClick={linkEvent(this, this.handleReplyCancel)}>Cancel</button>}
</div>
</div>
</form>
</div>
);
}
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handleCommentSubmit(i: CommentForm, event) {
if (i.props.edit) {
WebSocketService.Instance.editComment(i.state.commentForm);
} else {
WebSocketService.Instance.createComment(i.state.commentForm);
}
i.state.commentForm.content = undefined;
i.setState(i.state);
event.target.reset();
if (i.props.node) {
i.props.onReplyCancel();
}
}
handleCommentContentChange(i: CommentForm, event) {
i.state.commentForm.content = event.target.value;
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i.setState(i.state);
}
handleReplyCancel(i: CommentForm, event) {
i.props.onReplyCancel();
}
}