@modern-js/runtime-utils/dist/esm-node/node/fileReader.mjs

A Progressive React Framework for modern web development.

import "node:module";
import fs_extra from "@modern-js/utils/fs-extra";
import { createMemoryStorage } from "./storer/index.mjs";
class FileReader {
    async readFile(path, encoding = 'utf-8') {
        const { fs } = this;
        const _readfile = this._readFileFactory(fs);
        return _readfile(path, encoding);
    }
    async readFileFromSystem(path, encoding = 'utf-8') {
        const _readfile = this._readFileFactory(fs_extra);
        return _readfile(path, encoding);
    }
    _readFileFactory(fs) {
        return async (path, encoding = 'utf-8')=>{
            const cache = await this.storage.get(path);
            if (null === cache) return null;
            if (cache) return this.encodingContent(cache, encoding);
            const isExistFile = await new Promise((resolve)=>{
                fs.stat(path, (err, stats)=>{
                    if (err) return void resolve(false);
                    stats.isFile() ? resolve(true) : resolve(false);
                });
            });
            if (isExistFile) {
                const content = await fs.promises.readFile(path);
                this.storage.set(path, content);
                return this.encodingContent(content, encoding);
            }
            this.storage.set(path, null);
            return null;
        };
    }
    reset(fs) {
        fs && (this.fs = fs);
        return this.storage.clear?.();
    }
    encodingContent(value, encoding) {
        if ('utf-8' === encoding) return value.toString();
        return value;
    }
    constructor(storage){
        this.fs = fs_extra;
        this.storage = storage;
    }
}
const fileReader = new FileReader(createMemoryStorage('__file__system'));
export { FileReader, fileReader };