ebook-convert.js

delete require.cache['/home/srghma/.node_modules/lib/node_modules/ebook-convert/index.js']
convert = require('/home/srghma/.node_modules/lib/node_modules/ebook-convert')
async function convertAsync(options) {
  return new Promise((resolve, reject) => {
    convert(options, function (error) {
      if (error) { return reject(error) }
      return resolve()
    })
  })
}

dirPath = '/home/srghma/gdrive'
filesAbsPath = (await require('fs/promises').readdir(dirPath)).map(x => require('path').join(dirPath, x))

await Promise.all(filesAbsPath.map(filepath => { const newFilepath = filepath.replace(' (z-lib.org)', '').replace(' (z-lib.or', '').replace('’', '').replace('_z_lib_or', '').replace(/\.+(pdf|fb2|epub)$/gi, '.$1').replace('.epub.pdf', '.pdf'); return require('fs/promises').rename(filepath, newFilepath) }))

filesAbsPath = (await require('fs/promises').readdir(dirPath)).map(x => require('path').join(dirPath, x))
nonPdfFiles = filesAbsPath.filter(filepath => !filepath.endsWith('.pdf'))

await require('fs/promises').mkdir(`/home/srghma/gdrive-non-pdf`)
promises = nonPdfFiles.map(filepath => {
  const nameAndExt = require('path').parse(filepath).base
  const newFilepath = `/home/srghma/gdrive-non-pdf/${nameAndExt}`
  return require('fs/promises').rename(filepath, newFilepath)
})
await Promise.all(promises)

filesAbsPath = (await require('fs/promises').readdir(`/home/srghma/gdrive-non-pdf/`)).map(x => require('path').join(`/home/srghma/gdrive-non-pdf/`, x))
if (filesAbsPath.filter(filepath => filepath.endsWith('.pdf')).length > 0) { throw new Error('') }

promises = filesAbsPath.map(filepath => {
  const filenameWithoutDir = require('path').parse(filepath).name
  const newFilepath = `${dirPath}/${filenameWithoutDir}.pdf`
  return convertAsync({
    input: filepath,
    output: newFilepath,
    pdfDefaultFontSize: 12,
    pageBreaksBefore: '//h:h1',
    chapter: '//h:h1',
    pdfPageNumbers: true,
    insertBlankLine: true,
    insertBlankLineSize: '1',
    lineHeight: '12',
    marginTop: '50',
    marginRight: '50',
    marginBottom: '50',
    marginLeft: '50'
  })
})
await Promise.all(promises)