Miconfont SVGアイコンライブラリreact-native-svgを生成するために必要なフォーマット

const fs = require('fs');
const path = require('path');

const filePath = `${path.resolve('fontsvg')}/build`
// 
const isDirectory = (filePath) =>{
  return new Promise((resolve,reject) => {
    fs.access(filePath, (err) => {
      if(err){
        resolve('faild')
      }
      resolve('ok')
    })
  })
}

// 
const creactMkdir = (filePath) =>{
  return new Promise((resolve,reject) => {
    fs.mkdir(filePath, (err) => {
      if(err){return}
      resolve(true)
    })
  })
}

const writeSvg = (filePath) => {
  console.log(' ...')
  fs.readFile(`${path.resolve('fontsvg')}/iconfont.js`, 'utf8', (err, data) => {
    if (err) {
    } else {
      const svgArr = data.split('');
      svgArr.pop();
      let svgTmp = '';
      let viewBox = '';
      svgArr.forEach((svg) => {
        const tmpPath = svg.split(' x.slice(1).toUpperCase());
        const viewBoxValue = tmpPath[0].match('viewBox=.*"')[0].split('"')[1];
        if (viewBoxValue !== '0 0 1024 1024') {
          viewBox[viewBoxKey] = viewBoxValue;
          viewBox += `    ${viewBoxKey}: '${viewBoxValue}',
`;
        }
        const pathArr = [];
        tmpPath.shift();
        tmpPath.forEach((path) => {
          pathArr.push(`{${path.replace(/=/g, ': ').replace('fill', ', fill').replace('>', '')}}`);
        });
        svgTmp += `  ${viewBoxKey}: [${pathArr}],
`;
      });
      const svgStr = `export default {
${svgTmp}
}`;
      fs.writeFile(`${filePath}/iconfont.svg.js`, svgStr, 'utf8',() => {
        if (err) return
        console.log(' ')
      });
    }
  })
}

async function WriteFontSvg () {
  const directory = await isDirectory(filePath)
  if(directory == 'ok'){
    writeSvg(filePath)
  }else{
    const creact= await creactMkdir(filePath)
    if(creact){
      console.log(' ')
      writeSvg(filePath)
    }
  }
}

WriteFontSvg()