Files
openstapps/packages/easy-ast/src/util.ts
2023-05-31 14:04:05 +02:00

69 lines
2.1 KiB
TypeScript

/*
* Copyright (C) 2021 StApps
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, version 3.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <https://www.gnu.org/licenses/>.
*/
import {readdirSync, statSync} from 'fs';
import path from 'path';
/**
* Expand a path to a list of all files deeply contained in it
*/
export function expandPathToFilesSync(sourcePath: string, accept: (fileName: string) => boolean): string[] {
const fullPath = path.resolve(sourcePath);
const directory = statSync(fullPath);
return directory.isDirectory()
? readdirSync(fullPath).flatMap(fragment =>
expandPathToFilesSync(path.resolve(sourcePath, fragment), accept),
)
: [fullPath].filter(accept);
}
/**
* Take a Windows path and make a Unix path out of it
*/
export function toUnixPath(pathString: string): string {
return pathString.replaceAll(path.sep, path.posix.sep);
}
/**
* Filters only defined elements
*/
export function rejectNil<T>(array: Array<T | undefined | null>): T[] {
// eslint-disable-next-line unicorn/no-null
return array.filter(it => it != null) as T[];
}
/**
* Map elements that are not null
*/
export function mapNotNil<T, S>(array: readonly T[], transform: (element: T) => S | undefined | null): S[] {
return rejectNil(array.map(transform));
}
/**
* Deletes all properties with the value 'undefined', [] or {}
*/
// eslint-disable-next-line @typescript-eslint/ban-types
export function cleanupEmpty<T extends object>(object: T): T {
const out = {} as T;
for (const key in object) {
const value = object[key];
// eslint-disable-next-line unicorn/no-null
if (value != null && (typeof value !== 'object' || Object.values(value).length > 0)) {
out[key] = value;
}
}
return out;
}