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import { debounce, isArray, without } from 'lodash-es';
import { DateTime } from 'luxon';
import { runInAction } from 'mobx';
import { catchError, concat, last, merge, Observable, of, Subscription, switchMap, throwError } from 'rxjs';
import { tap } from 'rxjs/operators';
import { PluginApi } from '../model/plugin';
import { Ref } from '../model/ref';
import { Action, EmitAction, emitModels } from '../model/tag';
import { Store } from '../store/store';
import { merge3 } from '../util/diff';
import { hasTag } from '../util/tag';
import { ExtService } from './api/ext.service';
import { RefService } from './api/ref.service';
import { StompService } from './api/stomp.service';
import { TaggingService } from './api/tagging.service';
@Injectable({
providedIn: 'root'
})
export class ActionService {
constructor(
private refs: RefService,
private exts: ExtService,
private tags: TaggingService,
private store: Store,
private stomp: StompService,
) { }
wrap(ref?: Ref): PluginApi {
let o: Subscription | undefined = undefined;
return {
comment: debounce((comment: string) => {
if (!ref) throw 'Error: No ref to save';
o?.unsubscribe();
o = this.comment$(comment, ref).subscribe();
}, 500),
event: (event: string) => {
this.event(event, ref);
},
emit: (a: EmitAction) => {
this.emit(a, ref);
},
tag: (tag: string) => {
if (!ref) throw 'Error: No ref to tag';
this.tag(tag, ref);
},
respond: (response: string, clear?: string[]) => {
if (!ref) throw 'Error: No ref to respond to';
this.respond(response, clear || [], ref);
},
watch: (delimiter?: string) => {
if (!ref) throw 'Error: No ref to respond to';
return this.watch(ref, delimiter);
},
append: () => {
if (!ref) throw 'Error: No ref to respond to';
return this.append(ref);
}
}
}
apply$(actions: Action | Action[], ref: Ref, repost?: Ref) {
if (!isArray(actions)) actions = [actions];
const updates: Observable<any>[] = [];
for (const a of actions) {
if ('tag' in a) {
updates.push(this.tag$(a.tag, ref));
}
if ('response' in a) {
updates.push(this.respond$(a.response, a.clear || [], ref));
}
if ('event' in a) {
updates.push(this.event$(a.event, ref, repost));
}
if ('emit' in a) {
updates.push(this.emit$(a, ref));
}
}
if (!updates.length) return of(null);
return this.store.eventBus.runAndReload$(concat(...updates).pipe(last()), ref);
}
event(event: string, ref?: Ref, repost?: Ref) {
this.store.eventBus.fire(event, ref, repost);
this.store.eventBus.reset();
}
event$(event: string, ref?: Ref, repost?: Ref) {
this.store.eventBus.fire(event, ref, repost);
this.store.eventBus.reset();
return of(null);
}
emit(a: EmitAction, ref?: Ref) {
this.emit$(a, ref).subscribe();
}
emit$(a: EmitAction, ref?: Ref) {
const models = emitModels(a, ref, this.store.account.localTag);
const uploads = [
...models.ref.map(ref => this.refs.create(ref)),
...models.ext.map(ext => this.exts.create(ext)),
];
return concat(...uploads).pipe(last());
}
comment(comment: string, ref: Ref) {
this.store.eventBus.runAndRefresh(this.comment$(comment, ref), ref);
}
comment$(comment: string, ref: Ref) {
return this.refs.patch(ref.url, this.store.account.origin, ref.modifiedString!, [{
op: 'add',
path: '/comment',
value: comment,
}]).pipe(
catchError(err => {
if (err.status === 409) {
return this.refs.get(ref.url, this.store.account.origin).pipe(
switchMap(ref => this.refs.patch(ref.url, this.store.account.origin, ref.modifiedString!, [{
op: 'add',
path: '/comment',
value: comment,
}])),
);
}
return throwError(() => err);
}),
tap(cursor => runInAction(() => {
ref.comment = comment;
ref.modifiedString = cursor;
ref.modified = DateTime.fromISO(cursor);
})),
);
}
tag(tag: string, ref: Ref) {
this.store.eventBus.runAndReload(this.tag$(tag, ref), ref);
}
tag$(tag: string, ref: Ref) {
const patch = (hasTag(tag, ref) ? '-' : '') + tag;
return this.tags.create(patch, ref.url, this.store.account.origin);
}
respond(response: string, clear: string[], ref: Ref) {
this.store.eventBus.runAndRefresh(this.respond$(response, clear, ref), ref);
}
respond$(response: string, clear: string[], ref: Ref) {
if (ref.metadata?.userUrls?.includes(response)) {
ref.metadata ||= {};
ref.metadata.userUrls ||= [];
ref.metadata.userUrls = without(ref.metadata.userUrls, response);
return this.tags.deleteResponse(response, ref.url);
} else {
const tags = [
...clear.map(t => '-' + t),
response,
];
ref.metadata ||= {};
ref.metadata.userUrls ||= [];
ref.metadata.userUrls.push(response);
ref.metadata.userUrls = without(ref.metadata.userUrls, ...clear);
return this.tags.respond(tags, ref.url);
}
}
watch(ref: Ref, delimiter = '\n') {
let cursor = ref.origin === this.store.account.origin ? ref.modifiedString! : '';
let baseComment = ref.comment || '';
const inner = {
ref$: merge(...this.store.origins.list.map(origin => this.stomp.watchRef(ref.url, origin).pipe(
tap(u => {
if (u.origin === this.store.account.origin) cursor = u.modifiedString!;
baseComment = u.comment || '';
}),
))),
comment$: (comment: string): Observable<string> => {
if (!cursor) {
return this.refs.get(ref.url, this.store.account.origin).pipe(
tap(ref => {
cursor = ref.modifiedString!;
baseComment = ref.comment || '';
}),
switchMap(ref => inner.comment$(comment)),
);
}
return this.refs.patch(ref.url, this.store.account.origin, cursor, [{
op: 'add',
path: '/comment',
value: comment,
}]).pipe(
tap(c => {
cursor = c;
baseComment = comment;
}),
catchError(err => {
if (err.status === 409) {
// Fetch the current version from server
return this.refs.get(ref.url, this.store.account.origin).pipe(
switchMap(remote => {
const { result, conflict } = merge3(comment, baseComment, remote.comment || '', delimiter);
cursor = remote.modifiedString!;
baseComment = remote.comment || '';
if (conflict) return throwError(() => ({ conflict }));
return inner.comment$(result || '');
}),
);
}
return throwError(() => err);
}),
);
},
};
return inner;
}
append(ref: Ref) {
let cursor = ref.origin === this.store.account.origin ? ref.modifiedString! : '';
let comment = ref.comment || '';
const inner = {
updates$: merge(...this.store.origins.list.map(origin => this.stomp.watchRef(ref.url, origin).pipe(
tap(u => {
if (u.origin === this.store.account.origin) cursor = u.modifiedString!;
}),
switchMap(u => {
if (comment.startsWith(u?.comment || '')) return of()
if (!u.comment?.startsWith(comment)) {
comment = u.comment || '';
throw u;
}
const moves = u.comment.substring(comment.length).split('\n').map(m => m.trim()).filter(m => !!m);
comment = comment ? `${comment} \n${moves.join(' \n')}` : moves.join(' \n');
return moves;
})
))),
append$: (value: string): Observable<string> => {
if (!cursor) {
return this.refs.get(ref.url, this.store.account.origin).pipe(
tap(ref => cursor = ref.modifiedString!),
switchMap(ref => inner.append$(value)),
);
}
comment = comment ? `${comment} \n${value}` : value;
return this.refs.patch(ref.url, this.store.account.origin, cursor, [{
op: 'add',
path: '/comment',
value: comment,
}]).pipe(
tap(c => cursor = c),
);
},
reset$: (value: string[]): Observable<string> => {
if (!cursor) {
return this.refs.get(ref.url, this.store.account.origin).pipe(
tap(ref => cursor = ref.modifiedString!),
switchMap(ref => inner.reset$(value)),
);
}
comment = value.join(' \n');
return this.refs.patch(ref.url, this.store.account.origin, cursor, [{
op: 'add',
path: '/comment',
value: comment,
}]).pipe(
tap(c => cursor = c),
);
},
};
return inner;
}
}
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