fsWriteTextCore.mjs

// import fs from 'fs'
import get from 'lodash-es/get.js'
import getPathParent from './getPathParent.mjs'
import fsIsFolderCore from './fsIsFolderCore.mjs'
import fsCreateFolderCore from './fsCreateFolderCore.mjs'
import toResultError from './_toResultError.mjs'


/**
 * 後端nodejs寫入utf-8文字至檔案
 *
 * Unit Test: {@link https://github.com/yuda-lyu/wsemi/blob/master/test/fsWriteTextCore.test.mjs Github}
 * @memberOf wsemi
 * @param {String} fp 輸入檔案名稱
 * @param {String} c 輸入檔案內容utf-8字串
 * @returns {Object} 回傳結果物件，提供鍵success代表寫入之檔案路徑字串，提供鍵error代表錯誤訊息(寫檔或檢查上層資料夾之Error物件，注入之fs拋出非Error之值時為其字串)
 * @example
 * need test in nodejs.
 *
 * //see fsWriteText
 *
 */
function fsWriteTextCore(fp, c, opt = {}) {
    let bErr = false //是否出錯以布林旗標判定, 不以errTemp是否為null判定(注入之fs可拋出null)
    let errTemp = null

    try {

        //fs, 讀取opt置於try內: opt本身或其屬性不可讀(getter拋錯、已撤銷之Proxy)時get拋出, 於try外即成同步拋錯
        let fs = get(opt, 'fs')

        //fd
        let fd = getPathParent(fp)

        //check, 前置檢查置於try內: 注入之fs之lstatSync可拋錯, 於try外即成同步拋錯
        if (!fsIsFolderCore(fd, { fs })) {
            fsCreateFolderCore(fd, { fs })
        }

        //writeFileSync
        fs.writeFileSync(fp, c, 'utf8')

    }
    catch (err) {
        // console.log(err)
        bErr = true
        errTemp = err
    }

    if (bErr) {
        return {
            error: toResultError(errTemp), //Error或非空字串原樣, 其餘(null、undefined等)轉字串, 恆為truthy
        }
    }
    return {
        success: fp,
    }
}


export default fsWriteTextCore