/**

* @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.dev/license

*/

import { lastValueFrom } from 'rxjs';

import { normalize, virtualFs } from '../virtual-fs';

export interface WorkspaceHost {

readFile(path: string): Promise<string>;

writeFile(path: string, data: string): Promise<void>;

isDirectory(path: string): Promise<boolean>;

isFile(path: string): Promise<boolean>;

// Potential future additions

// readDirectory?(path: string): Promise<string[]>;

}

export function createWorkspaceHost(host: virtualFs.Host): WorkspaceHost {

const workspaceHost: WorkspaceHost = {

async readFile(path: string): Promise<string> {

const data = await lastValueFrom(host.read(normalize(path)));

return virtualFs.fileBufferToString(data);

},

async writeFile(path: string, data: string): Promise<void> {

return lastValueFrom(host.write(normalize(path), virtualFs.stringToFileBuffer(data)));

},

async isDirectory(path: string): Promise<boolean> {

try {

return await lastValueFrom(host.isDirectory(normalize(path)));

} catch {

// some hosts throw if path does not exist

return false;

}

},

async isFile(path: string): Promise<boolean> {

try {

return await lastValueFrom(host.isFile(normalize(path)));

} catch {

// some hosts throw if path does not exist

return false;

}

},

};

return workspaceHost;

}