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

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import { Component, linkEvent } from 'inferno';
import { Subscription } from "rxjs";
import { retryWhen, delay, take } from 'rxjs/operators';
import { PostForm as PostFormI, Post, PostResponse, UserOperation, Community, ListCommunitiesResponse } from '../interfaces';
import { WebSocketService, UserService } from '../services';
import { msgOp } from '../utils';
import { MomentTime } from './moment-time';
interface PostFormProps {
post?: Post; // If a post is given, that means this is an edit
onCancel?();
onCreate?(id: number);
onEdit?(post: Post);
}
interface PostFormState {
postForm: PostFormI;
communities: Array<Community>;
}
export class PostForm extends Component<PostFormProps, PostFormState> {
private subscription: Subscription;
private emptyState: PostFormState = {
postForm: {
name: null,
auth: null,
community_id: null
},
communities: []
}
constructor(props, context) {
super(props, context);
this.state = this.emptyState;
if (this.props.post) {
this.state.postForm = {
body: this.props.post.body,
name: this.props.post.name,
community_id: this.props.post.community_id,
edit_id: this.props.post.id,
url: this.props.post.url,
auth: null
}
}
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.listCommunities();
}
componentWillUnmount() {
this.subscription.unsubscribe();
}
render() {
return (
<div>
<form onSubmit={linkEvent(this, this.handlePostSubmit)}>
<div class="form-group row">
<label class="col-sm-2 col-form-label">URL</label>
<div class="col-sm-10">
<input type="url" class="form-control" value={this.state.postForm.url} onInput={linkEvent(this, this.handlePostUrlChange)} />
</div>
</div>
<div class="form-group row">
<label class="col-sm-2 col-form-label">Title</label>
<div class="col-sm-10">
<textarea value={this.state.postForm.name} onInput={linkEvent(this, this.handlePostNameChange)} class="form-control" required rows={3} />
</div>
</div>
<div class="form-group row">
<label class="col-sm-2 col-form-label">Body</label>
<div class="col-sm-10">
<textarea value={this.state.postForm.body} onInput={linkEvent(this, this.handlePostBodyChange)} class="form-control" rows={6} />
</div>
</div>
<div class="form-group row">
<label class="col-sm-2 col-form-label">Forum</label>
<div class="col-sm-10">
<select class="form-control" value={this.state.postForm.community_id} onInput={linkEvent(this, this.handlePostCommunityChange)}>
{this.state.communities.map(community =>
<option value={community.id}>{community.name}</option>
)}
</select>
</div>
</div>
<div class="form-group row">
<div class="col-sm-10">
<button type="submit" class="btn btn-secondary">{this.props.post ? 'Edit' : 'Create'} Post</button>
</div>
</div>
</form>
</div>
);
}
handlePostSubmit(i: PostForm, event) {
event.preventDefault();
if (i.props.post) {
WebSocketService.Instance.editPost(i.state.postForm);
} else {
WebSocketService.Instance.createPost(i.state.postForm);
}
}
handlePostUrlChange(i: PostForm, event) {
i.state.postForm.url = event.target.value;
i.setState(i.state);
}
handlePostNameChange(i: PostForm, event) {
i.state.postForm.name = event.target.value;
i.setState(i.state);
}
handlePostBodyChange(i: PostForm, event) {
i.state.postForm.body = event.target.value;
i.setState(i.state);
}
handlePostCommunityChange(i: PostForm, event) {
i.state.postForm.community_id = Number(event.target.value);
i.setState(i.state);
}
parseMessage(msg: any) {
let op: UserOperation = msgOp(msg);
if (msg.error) {
return;
} else if (op == UserOperation.ListCommunities) {
let res: ListCommunitiesResponse = msg;
this.state.communities = res.communities;
if (this.props.post) {
this.state.postForm.community_id = this.props.post.community_id;
} else {
this.state.postForm.community_id = res.communities[0].id;
}
this.setState(this.state);
} else if (op == UserOperation.CreatePost) {
let res: PostResponse = msg;
this.props.onCreate(res.post.id);
} else if (op == UserOperation.EditPost) {
let res: PostResponse = msg;
this.props.onEdit(res.post);
}
}
}