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

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import { Component, linkEvent } from 'inferno';
import { PostListings } from './post-listings';
import { Subscription } from "rxjs";
import { retryWhen, delay, take } from 'rxjs/operators';
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import { PostForm as PostFormI, PostFormParams, Post, PostResponse, UserOperation, Community, ListCommunitiesResponse, ListCommunitiesForm, SortType, SearchForm, SearchType, SearchResponse } from '../interfaces';
import { WebSocketService, UserService } from '../services';
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import { msgOp, getPageTitle, debounce, validURL, capitalizeFirstLetter, markdownHelpUrl, mdToHtml } from '../utils';
import * as autosize from 'autosize';
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import { i18n } from '../i18next';
import { T } from 'inferno-i18next';
interface PostFormProps {
post?: Post; // If a post is given, that means this is an edit
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params?: PostFormParams;
onCancel?(): any;
onCreate?(id: number): any;
onEdit?(post: Post): any;
}
interface PostFormState {
postForm: PostFormI;
communities: Array<Community>;
loading: boolean;
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imageLoading: boolean;
previewMode: boolean;
suggestedTitle: string;
suggestedPosts: Array<Post>;
crossPosts: Array<Post>;
}
export class PostForm extends Component<PostFormProps, PostFormState> {
private subscription: Subscription;
private emptyState: PostFormState = {
postForm: {
name: null,
nsfw: false,
auth: null,
community_id: null,
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creator_id: (UserService.Instance.user) ? UserService.Instance.user.id : null,
},
communities: [],
loading: false,
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imageLoading: false,
previewMode: false,
suggestedTitle: undefined,
suggestedPosts: [],
crossPosts: [],
}
constructor(props: any, context: any) {
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,
creator_id: this.props.post.creator_id,
url: this.props.post.url,
nsfw: this.props.post.nsfw,
auth: null
}
}
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if (this.props.params) {
this.state.postForm.name = this.props.params.name;
if (this.props.params.url) {
this.state.postForm.url = this.props.params.url;
}
if (this.props.params.body) {
this.state.postForm.body = this.props.params.body;
}
}
this.subscription = WebSocketService.Instance.subject
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.pipe(retryWhen(errors => errors.pipe(delay(3000), take(10))))
.subscribe(
(msg) => this.parseMessage(msg),
(err) => console.error(err),
() => console.log('complete')
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);
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let listCommunitiesForm: ListCommunitiesForm = {
sort: SortType[SortType.TopAll],
limit: 9999,
}
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WebSocketService.Instance.listCommunities(listCommunitiesForm);
}
componentDidMount() {
autosize(document.querySelectorAll('textarea'));
}
componentWillUnmount() {
this.subscription.unsubscribe();
}
render() {
return (
<div>
<form onSubmit={linkEvent(this, this.handlePostSubmit)}>
<div class="form-group row">
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<label class="col-sm-2 col-form-label"><T i18nKey="url">#</T></label>
<div class="col-sm-10">
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<input type="url" class="form-control" value={this.state.postForm.url} onInput={linkEvent(this, this.handlePostUrlChange)} />
{this.state.suggestedTitle &&
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<div class="mt-1 text-muted small font-weight-bold pointer" onClick={linkEvent(this, this.copySuggestedTitle)}><T i18nKey="copy_suggested_title" interpolation={{title: this.state.suggestedTitle}}>#</T></div>
}
<form>
<label htmlFor="file-upload" class="pointer d-inline-block mr-2 float-right text-muted small font-weight-bold"><T i18nKey="upload_image">#</T></label>
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<input id="file-upload" type="file" accept="image/*,video/*" name="file" class="d-none" onChange={linkEvent(this, this.handleImageUpload)} />
</form>
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{this.state.imageLoading &&
<svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg>
}
{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>
</div>
<div class="form-group row">
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<label class="col-sm-2 col-form-label"><T i18nKey="title">#</T></label>
<div class="col-sm-10">
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<textarea value={this.state.postForm.name} onInput={linkEvent(this, this.handlePostNameChange)} class="form-control" required rows={2} minLength={3} maxLength={100} />
{this.state.suggestedPosts.length > 0 &&
<>
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<div class="my-1 text-muted small font-weight-bold"><T i18nKey="related_posts">#</T></div>
<PostListings posts={this.state.suggestedPosts} />
</>
}
</div>
</div>
<div class="form-group row">
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<label class="col-sm-2 col-form-label"><T i18nKey="body">#</T></label>
<div class="col-sm-10">
<textarea value={this.state.postForm.body} onInput={linkEvent(this, this.handlePostBodyChange)} className={`form-control ${this.state.previewMode && 'd-none'}`} rows={4} maxLength={10000} />
{this.state.previewMode &&
<div className="md-div" dangerouslySetInnerHTML={mdToHtml(this.state.postForm.body)} />
}
{this.state.postForm.body &&
<button className={`mt-1 mr-2 btn btn-sm btn-secondary ${this.state.previewMode && 'active'}`} onClick={linkEvent(this, this.handlePreviewToggle)}><T i18nKey="preview">#</T></button>
}
<a href={markdownHelpUrl} target="_blank" class="d-inline-block float-right text-muted small font-weight-bold"><T i18nKey="formatting_help">#</T></a>
</div>
</div>
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{!this.props.post &&
<div class="form-group row">
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<label class="col-sm-2 col-form-label"><T i18nKey="community">#</T></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>
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</div>
}
<div class="form-group row">
<div class="col-sm-10">
<div class="form-check">
<input class="form-check-input" type="checkbox" checked={this.state.postForm.nsfw} onChange={linkEvent(this, this.handlePostNsfwChange)}/>
<label class="form-check-label"><T i18nKey="nsfw">#</T></label>
</div>
</div>
</div>
<div class="form-group row">
<div class="col-sm-10">
<button type="submit" class="btn btn-secondary mr-2">
{this.state.loading ?
<svg class="icon icon-spinner spin"><use xlinkHref="#icon-spinner"></use></svg> :
this.props.post ? capitalizeFirstLetter(i18n.t('save')) : capitalizeFirstLetter(i18n.t('create'))}</button>
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{this.props.post && <button type="button" class="btn btn-secondary" onClick={linkEvent(this, this.handleCancel)}><T i18nKey="cancel">#</T></button>}
</div>
</div>
</form>
</div>
);
}
handlePostSubmit(i: PostForm, event: any) {
event.preventDefault();
if (i.props.post) {
WebSocketService.Instance.editPost(i.state.postForm);
} else {
WebSocketService.Instance.createPost(i.state.postForm);
}
i.state.loading = true;
i.setState(i.state);
}
copySuggestedTitle(i: PostForm) {
i.state.postForm.name = i.state.suggestedTitle;
i.state.suggestedTitle = undefined;
i.setState(i.state);
}
handlePostUrlChange(i: PostForm, event: any) {
i.state.postForm.url = event.target.value;
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if (validURL(i.state.postForm.url)) {
let form: SearchForm = {
q: i.state.postForm.url,
type_: SearchType[SearchType.Url],
sort: SortType[SortType.TopAll],
page: 1,
limit: 6,
};
WebSocketService.Instance.search(form);
// Fetch the page title
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getPageTitle(i.state.postForm.url).then(d => {
i.state.suggestedTitle = d;
i.setState(i.state);
});
} else {
i.state.suggestedTitle = undefined;
i.state.crossPosts = [];
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}
i.setState(i.state);
}
handlePostNameChange(i: PostForm, event: any) {
i.state.postForm.name = event.target.value;
let form: SearchForm = {
q: i.state.postForm.name,
type_: SearchType[SearchType.Posts],
sort: SortType[SortType.TopAll],
community_id: i.state.postForm.community_id,
page: 1,
limit: 6,
};
if (i.state.postForm.name !== '') {
WebSocketService.Instance.search(form);
} else {
i.state.suggestedPosts = [];
}
i.setState(i.state);
}
handlePostBodyChange(i: PostForm, event: any) {
i.state.postForm.body = event.target.value;
i.setState(i.state);
}
handlePostCommunityChange(i: PostForm, event: any) {
i.state.postForm.community_id = Number(event.target.value);
i.setState(i.state);
}
handlePostNsfwChange(i: PostForm, event: any) {
i.state.postForm.nsfw = event.target.checked;
i.setState(i.state);
}
handleCancel(i: PostForm) {
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i.props.onCancel();
}
handlePreviewToggle(i: PostForm, event: any) {
event.preventDefault();
i.state.previewMode = !i.state.previewMode;
i.setState(i.state);
}
handleImageUpload(i: PostForm, event: any) {
event.preventDefault();
let file = event.target.files[0];
const imageUploadUrl = `/pictshare/api/upload.php`;
const formData = new FormData();
formData.append('file', file);
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i.state.imageLoading = true;
i.setState(i.state);
fetch(imageUploadUrl, {
method: 'POST',
body: formData,
})
.then(res => res.json())
.then(res => {
let url = `${window.location.origin}/pictshare/${res.url}`;
if (res.filetype == 'mp4') {
url += '/raw';
}
i.state.postForm.url = url;
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i.state.imageLoading = false;
i.setState(i.state);
})
.catch((error) => {
i.state.imageLoading = false;
i.setState(i.state);
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alert(error);
})
}
parseMessage(msg: any) {
let op: UserOperation = msgOp(msg);
if (msg.error) {
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alert(i18n.t(msg.error));
this.state.loading = false;
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this.setState(this.state);
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;
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} else if (this.props.params && this.props.params.community) {
let foundCommunityId = res.communities.find(r => r.name == this.props.params.community).id;
this.state.postForm.community_id = foundCommunityId;
} else {
this.state.postForm.community_id = res.communities[0].id;
}
this.setState(this.state);
} else if (op == UserOperation.CreatePost) {
this.state.loading = false;
let res: PostResponse = msg;
this.props.onCreate(res.post.id);
} else if (op == UserOperation.EditPost) {
this.state.loading = false;
let res: PostResponse = msg;
this.props.onEdit(res.post);
} else if (op == UserOperation.Search) {
let res: SearchResponse = msg;
if (res.type_ == SearchType[SearchType.Posts]) {
this.state.suggestedPosts = res.posts;
} else if (res.type_ == SearchType[SearchType.Url]) {
this.state.crossPosts = res.posts;
}
this.setState(this.state);
}
}
}