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import { Injectable } from '@angular/core';
import { delay } from 'lodash-es';
import { autorun } from 'mobx';
import { catchError, concat, first, map, Observable, of } from 'rxjs';
import { tap } from 'rxjs/operators';
import { mapPage, Page } from '../../model/page';
import { mapRef, Ref, RefFilter, RefPageArgs, writeEdit, writeRef } from '../../model/ref';
import { Store } from '../../store/store';
import { params } from '../../util/http';
import { escapePath, OpPatch } from '../../util/json-patch';
import { ConfigService } from '../config.service';
import { LoginService } from '../login.service';
export const REF_CACHE_MS = 15 * 60 * 1000;
@Injectable({
providedIn: 'root',
})
export class RefService {
private _cache = new Map<string, boolean>();
constructor(
private http: HttpClient,
private config: ConfigService,
private store: Store,
private login: LoginService,
) {
autorun(() => {
Iif (this.store.eventBus.event === 'reload') {
this.store.eventBus.catchError$(this.get(this.store.eventBus.ref!.url, this.store.eventBus.ref!.origin!))
.subscribe(ref => this.store.eventBus.refresh(ref));
}
});
}
private get base() {
return this.config.api + '/api/v1/ref';
}
create(ref: Ref): Observable<string> {
return this.http.post<string>(this.base, writeRef(ref)).pipe(
catchError(err => this.login.handleHttpError(err)),
);
}
get(url: string, origin = ''): Observable<Ref> {
return this.http.get(this.base, {
params: params({ url, origin }),
}).pipe(
map(mapRef),
catchError(err => this.login.handleHttpError(err)),
);
}
getCurrent(url: string): Observable<Ref> {
return this.page({ url, size: 1 }).pipe(
map(page => {
if (!page.content.length) throw { status: 404 };
return page.content[0];
}),
);
}
getDefaults(...tags: string[]): Observable<{ url: string, ref: Partial<Ref> } | undefined> {
return concat(...[
...tags.map(t => this.getCurrent('tag:/' + t).pipe(
catchError(err => of()),
)),
of(undefined),
]).pipe(
first(),
map(ref => {
Eif (!ref) return ref;
const url = ref.url;
const partial: Partial<Ref> = ref;
delete partial.url;
delete partial.origin;
delete partial.modified;
delete partial.modifiedString;
delete partial.created;
delete partial.published;
return { url, ref: partial };
})
);
}
exists(url: string, origin?: string): Observable<boolean> {
const key = (origin || '') + ':' + url;
if (this._cache.has(key)) return of(this._cache.get(key)!);
delay(() => this._cache.delete(key), REF_CACHE_MS);
return this.count({ url, query: origin }).pipe(
map(n => !!n),
tap(e => this._cache.set(key, e)),
);
}
page(args?: RefPageArgs): Observable<Page<Ref>> {
if (args?.query === '!@*') return of(Page.of<Ref>([]));
if (args && args.obsolete === undefined) {
args.obsolete = false;
}
return this.http.get(`${this.base}/page`, {
params: params(args),
}).pipe(
map(mapPage(mapRef)),
catchError(err => this.login.handleHttpError(err)),
);
}
count(args?: RefFilter): Observable<number> {
if (args && args.obsolete === undefined) {
args.obsolete = false;
}
return this.http.get(`${this.base}/count`, {
responseType: 'text',
params: params(args),
}).pipe(
map(parseInt),
catchError(err => this.login.handleHttpError(err)),
);
}
update(ref: Ref): Observable<string> {
return this.http.put<string>(this.base, writeRef(ref)).pipe(
catchError(err => this.login.handleHttpError(err)),
);
}
getEditing(url: string): Observable<Ref | undefined> {
if (!this.store.account.localTag) return of(undefined);
return this.page({
url,
query: this.store.account.localTag + ':plugin/editing',
size: 1,
obsolete: null,
}).pipe(
map(page => page.content[0]),
catchError(() => of(undefined)),
);
}
startEditing(ref: Ref) {
return this.create({
url: ref.url,
origin: this.store.account.origin,
tags: [this.store.account.localTag, 'plugin/editing'],
plugins: { 'plugin/editing': writeEdit(ref) }
});
}
saveEdit(ref: Ref, cursor?: string): Observable<string> {
if (!cursor) return this.startEditing(ref);
return this.patch(ref.url, this.store.account.origin, cursor, [{
op: 'add',
path: '/plugins/' + escapePath('plugin/editing'),
value: writeEdit(ref),
}]);
}
patch(url: string, origin: string, cursor: string, patch: OpPatch[]): Observable<string> {
return this.http.patch<string>(this.base, patch, {
headers: { 'Content-Type': 'application/json-patch+json' },
params: params({ url, origin, cursor }),
}).pipe(
catchError(err => this.login.handleHttpError(err)),
);
}
merge(url: string, origin: string, cursor: string, patch: Partial<Ref>): Observable<string> {
return this.http.patch<string>(this.base, patch, {
headers: { 'Content-Type': 'application/merge-patch+json' },
params: params({ url, origin, cursor }),
}).pipe(
catchError(err => this.login.handleHttpError(err)),
);
}
delete(url: string, origin = ''): Observable<void> {
return this.http.delete<void>(this.base, {
params: params({ url, origin }),
}).pipe(
catchError(err => this.login.handleHttpError(err)),
);
}
}
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