"use strict";
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.SyncDelegateHost = exports.SynchronousDelegateExpectedException = void 0;
const exception_1 = require("../../exception");
class SynchronousDelegateExpectedException extends exception_1.BaseException {
    constructor() {
        super(`Expected a synchronous delegate but got an asynchronous one.`);
    }
}
exports.SynchronousDelegateExpectedException = SynchronousDelegateExpectedException;
/**
 * Implement a synchronous-only host interface (remove the Observable parts).
 */
class SyncDelegateHost {
    constructor(_delegate) {
        this._delegate = _delegate;
        if (!_delegate.capabilities.synchronous) {
            throw new SynchronousDelegateExpectedException();
        }
    }
    _doSyncCall(observable) {
        let completed = false;
        let result = undefined;
        let errorResult = undefined;
        // Perf note: this is not using an observer object to avoid a performance penalty in RxJS.
        // See https://github.com/ReactiveX/rxjs/pull/5646 for details.
        observable.subscribe((x) => (result = x), (err) => (errorResult = err), () => (completed = true));
        if (errorResult !== undefined) {
            throw errorResult;
        }
        if (!completed) {
            throw new SynchronousDelegateExpectedException();
        }
        // The non-null operation is to work around `void` type. We don't allow to return undefined
        // but ResultT could be void, which is undefined in JavaScript, so this doesn't change the
        // behaviour.
        // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
        return result;
    }
    get capabilities() {
        return this._delegate.capabilities;
    }
    get delegate() {
        return this._delegate;
    }
    write(path, content) {
        return this._doSyncCall(this._delegate.write(path, content));
    }
    read(path) {
        return this._doSyncCall(this._delegate.read(path));
    }
    delete(path) {
        return this._doSyncCall(this._delegate.delete(path));
    }
    rename(from, to) {
        return this._doSyncCall(this._delegate.rename(from, to));
    }
    list(path) {
        return this._doSyncCall(this._delegate.list(path));
    }
    exists(path) {
        return this._doSyncCall(this._delegate.exists(path));
    }
    isDirectory(path) {
        return this._doSyncCall(this._delegate.isDirectory(path));
    }
    isFile(path) {
        return this._doSyncCall(this._delegate.isFile(path));
    }
    // Some hosts may not support stat.
    stat(path) {
        const result = this._delegate.stat(path);
        if (result) {
            return this._doSyncCall(result);
        }
        else {
            return null;
        }
    }
    watch(path, options) {
        return this._delegate.watch(path, options);
    }
}
exports.SyncDelegateHost = SyncDelegateHost;
