47 lines
1.4 KiB
TypeScript
47 lines
1.4 KiB
TypeScript
/*
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Copyright 2022-2024 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE files in the repository root for full details.
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*/
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import crypto from "node:crypto";
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import fs from "node:fs";
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import path from "node:path";
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export async function randomArray(size: number): Promise<string> {
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return new Promise((resolve, reject) => {
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crypto.randomBytes(size, (err, buf) => {
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if (err) {
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reject(err);
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} else {
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resolve(buf.toString("base64").replace(/=+$/g, ""));
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}
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});
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});
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}
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type JsonValue = null | string | number;
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type JsonArray = Array<JsonValue | JsonObject | JsonArray>;
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interface JsonObject {
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[key: string]: JsonObject | JsonArray | JsonValue;
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}
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export type Json = JsonArray | JsonObject;
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/**
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* Synchronously load a JSON file from the local filesystem.
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* Unlike `require`, will never execute any javascript in a loaded file.
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* @param paths - An array of path segments which will be joined using the system's path delimiter.
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*/
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export function loadJsonFile<T extends Json>(...paths: string[]): T {
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const joinedPaths = path.join(...paths);
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if (!fs.existsSync(joinedPaths)) {
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console.log(`Skipping nonexistent file: ${joinedPaths}`);
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return {} as T;
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}
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const file = fs.readFileSync(joinedPaths, { encoding: "utf-8" });
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return JSON.parse(file);
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}
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