forked from mystiq/hydrogen-web
54 lines
1.7 KiB
TypeScript
54 lines
1.7 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {BaseObservableValue, ObservableValue} from "../observable/ObservableValue";
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export interface IAbortable {
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abort();
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}
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export type SetAbortableFn = (a: IAbortable) => typeof a;
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export type SetProgressFn<P> = (progress: P) => void;
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type RunFn<T, P> = (setAbortable: SetAbortableFn, setProgress: SetProgressFn<P>) => T;
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export class AbortableOperation<T, P = void> implements IAbortable {
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public readonly result: T;
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private _abortable?: IAbortable;
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private _progress: ObservableValue<P | undefined>;
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constructor(run: RunFn<T, P>) {
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this._abortable = undefined;
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const setAbortable: SetAbortableFn = abortable => {
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this._abortable = abortable;
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return abortable;
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};
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this._progress = new ObservableValue<P | undefined>(undefined);
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const setProgress: SetProgressFn<P> = (progress: P) => {
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this._progress.set(progress);
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};
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this.result = run(setAbortable, setProgress);
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}
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get progress(): BaseObservableValue<P | undefined> {
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return this._progress;
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}
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abort() {
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this._abortable?.abort();
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this._abortable = undefined;
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}
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}
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