60 lines
1.7 KiB
TypeScript
60 lines
1.7 KiB
TypeScript
import fs from "fs";
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import { resolve } from "path";
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import { createHash } from "crypto";
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export function repeat(char: string, length: number): string {
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if (char.length === 0) { return ""; }
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let output = char;
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while (output.length < length) { output = output + output; }
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return output.substring(0, length);
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}
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export function sha256(content: Buffer): string {
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const hasher = createHash("sha256");
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hasher.update(content);
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return "0x" + hasher.digest("hex");
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}
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export function sortRecords(record: Record<string, any>): Record<string, any> {
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const keys = Object.keys(record);
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keys.sort();
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return keys.reduce((accum, name) => {
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accum[name] = record[name];
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return accum;
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}, <Record<string, any>>{ });
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}
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export function atomicWrite(path: string, value: string | Uint8Array): void {
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const tmp = resolve(__dirname, "../../../.atomic-tmp");
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fs.writeFileSync(tmp, value);
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fs.renameSync(tmp, path);
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}
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export function loadJson(path: string): any {
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return JSON.parse(fs.readFileSync(path).toString());
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}
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export function saveJson(filename: string, data: any, sort?: boolean): any {
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let replacer: (key: string, value: any) => any = undefined;
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if (sort) {
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replacer = (key, value) => {
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if (Array.isArray(value)) {
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// pass
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} else if (value && typeof(value) === "object") {
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const keys = Object.keys(value);
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keys.sort();
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return keys.reduce((accum, key) => {
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accum[key] = value[key];
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return accum;
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}, <Record<string, any>>{});
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}
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return value;
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};
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}
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atomicWrite(filename, JSON.stringify(data, replacer, 2) + "\n");
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}
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