99 lines
1.7 KiB
TypeScript
99 lines
1.7 KiB
TypeScript
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import type { OpenMode } from 'node:fs';
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import * as Node from 'node:fs/promises';
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export class FileHandle {
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private path: string
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constructor(
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path: string
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) {
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this.path = path
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}
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public async text(encoding?: BufferEncoding) {
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if (!encoding) {
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encoding = "utf-8"
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}
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const fileContent = await Node.readFile(this.path, {encoding: encoding})
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return fileContent
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}
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public async write(text: string, append?: boolean) {
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if (!append) {
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append = true
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}
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const flag : OpenMode = append ? "a+" : "w"
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await Node.writeFile(this.path, text, {flag: flag})
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}
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}
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/**
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* Checks if the file exists
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*
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* @param path `string` path for the file
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* @returns if the file is readable
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*/
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export async function doesFileExist(path: string): Promise<boolean> {
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try {
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await Node.access(path)
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} catch {
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return false
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}
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return true
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}
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export async function loadFile(path: string, create?: boolean): Promise<FileHandle> {
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const DEFAULT_MODE = 0o600
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// Safe to use
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// worst case: create = false -> create = false
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if (!create) {
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create = false
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}
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let fd : Node.FileHandle | null = null
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try {
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fd = await Node.open(path, "r+", DEFAULT_MODE)
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} catch {
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}
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// We have a FD, return it
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if (fd) {
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await fd.close()
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return new FileHandle(path)
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}
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if (!create) {
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// UGLY: make more specific
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throw new Error("The required file does not exist")
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}
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// We do want this to throw without catching here
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fd = await Node.open(path, "w", DEFAULT_MODE)
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await fd.close()
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return new FileHandle(path)
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}
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