/*!

* @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 {normalizePath} from './navigation.utils';

import {FileAndContent} from '../interfaces';

interface DirEnt<T> {

name: T;

isFile(): boolean;

isDirectory(): boolean;

}

interface FileSystemAPI {

readdir(

path: string,

options: {

encoding?:

| 'ascii'

| 'utf8'

| 'utf-8'

| 'utf16le'

| 'ucs2'

| 'ucs-2'

| 'base64'

| 'base64url'

| 'latin1'

| 'binary'

| 'hex'

| null;

withFileTypes: true;

},

): Promise<DirEnt<string>[]>;

readFile(path: string, encoding?: string): Promise<string>;

}

export const checkFilesInDirectory = async (

dir: string,

fs: FileSystemAPI,

filterFoldersPredicate: (path?: string) => boolean = () => true,

files: FileAndContent[] = [],

) => {

const entries = (await fs.readdir(dir, {withFileTypes: true})) ?? [];

for (const entry of entries) {

const fullPath = normalizePath(`${dir}/${entry.name}`);

if (entry.isFile()) {

const content = await fs.readFile(fullPath, 'utf-8');

files.push({content, path: fullPath});

} else if (entry.isDirectory() && filterFoldersPredicate(entry.name)) {

await checkFilesInDirectory(fullPath, fs, filterFoldersPredicate, files);

}

}

return files;

};