翻译一条多语言文本，并写入 XCode strings 多语言文件

ios_proj_trans.js

/**
 * 翻译一条多语言文本，并写入 XCode strings 多语言文件
 *  （如果没有路由器翻墙，可能需要使用proxychains 执行）
 * //https://github.com/iamtraction/google-translate
 *  1. npm install --save @iamtraction/google-translate
 *  2. pc node ./ios_proj_trans.js 
 */


const fs = require('fs');

const translate = require('@iamtraction/google-translate');
// 项目文件,xcodeproj 所在目录 
var PROJECT_DIR = "/Users/haozes/Documents/GitHub/yaoyao/YaoYao/YaoYao"
//  需要翻译的内容
var TRANS_TEXT = "Background is on";
// 有时翻译文本太长或有引号，缩写作为KEY
var TRANS_ABBR = "BACKGROUND_TIP_DESC"
// 文本原语言
var FROM_LAN = "en"

async function translateText(text, fromLan, toLan) {
  return new Promise((resolve, reject) => {
    translate(text, { from: fromLan, to: toLan }).then(res => {
      resolve(res.text);
    }).catch(err => {
      console.error(err);
      reject(err);
    });
  })
}

const directories = source => fs.readdirSync(source, {
  withFileTypes: true
}).reduce((a, c) => {
  c.isDirectory() && a.push(c.name)
  return a
}, [])


// get all .lproj dir
function getLProjDirs(baseDir) {
  let dirs = directories(baseDir);
  let projDirs = dirs.filter(d => d.indexOf(".lproj") > 0);

  return projDirs
}

function writeTransFile(txtKey, trans, abbr, strFile) {
  console.log(">>> write to:", strFile, "trans:", trans);
  if (fs.existsSync(strFile) == false) {
    console.warn(`${strFile} not exist!!`);
    return
  }

  let line = `\n"${txtKey}" = "${trans}";`;
  if (abbr) {
    line = `\n// ${txtKey}`; // 加一行注释
    line += `\n"${abbr}" = "${trans}";`;
  }
  const buffer = fs.readFileSync(strFile);
  const fileContent = buffer.toString();

  if (fileContent.indexOf(line) >= 0) {
    console.warn(`${line} exists in ${strFile}`);
  } else {
    fs.appendFileSync(strFile, line)
  }
}

// xcode多语言文件夹名，映射成google translate 目标语言
function getLans(projDirs) {
  return projDirs.map((p) => {
    var dName = p.split(".")[0];
    if (dName == "Base") {
      dName = "en"
    }
    else if (dName == "es-419") {
      dName = "es"
    }
    else if (dName == "pt-BR") {
      dName = "pt"
    }
    else if (dName == "pt-PT") {
      dName = "pt"
    }
    else if (dName == "ro-RO") {
      dName = "ro"
    }
    else if (dName == "zh-Hans") {
      dName = "zh-CN"
    }
    else if (dName == "zh-Hant") {
      dName = "zh-TW"
    }
    return dName
  })
}

async function main() {
  let projDirs = getLProjDirs(PROJECT_DIR);
  console.log(projDirs);
  let toLans = getLans(projDirs);
  console.log(toLans);
  projDirs = projDirs.map(p => PROJECT_DIR + "/" + p);
  let stringsFiles = projDirs.map(d => d + "/Localizable.strings");

  for (var i = 0; i < toLans.length; i++) {
    let lan = toLans[i];
    let strFile = stringsFiles[i];
    let transRet = await translateText(TRANS_TEXT, FROM_LAN, lan);
    writeTransFile(TRANS_TEXT, transRet, TRANS_ABBR, strFile);
  }
  console.log(">>> all done");
}

main();