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Scala Zip with cats IO
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| package trackit.helper | |
| import java.io.{File, FileInputStream, FileOutputStream} | |
| import cats.effect.IO | |
| import cats.effect.Resource.fromAutoCloseable | |
| import org.apache.commons.compress.archivers.{ArchiveOutputStream, ArchiveStreamFactory} | |
| import org.apache.commons.compress.archivers.zip.ZipArchiveEntry | |
| import org.apache.commons.compress.utils.IOUtils | |
| object ZipHelper { | |
| def getListByExtension(dir: String, extension: String): IO[List[File]] = | |
| IO(new File(dir)).map { d => | |
| if (d.isDirectory) { | |
| d.listFiles | |
| .filter(_.isFile) | |
| .filter(_.getName.endsWith(s".$extension")) | |
| .toList | |
| } else Nil | |
| } | |
| /** | |
| * | |
| * @param sourceFolder directory with file to zip | |
| * @param destFolder destination zip file | |
| * @param zipFileName the name of zip archive | |
| * @param extension extension of files to zip in sourceFolder | |
| * @return the complete path of zipped file | |
| */ | |
| def zipFiles(sourceFolder: String, destFolder: String, zipFileName: String, extension: String): IO[String] = { | |
| def zipFileList(files: List[File], archive: ArchiveOutputStream): IO[Unit] = files.foldLeft(IO.unit) { (io, file) => | |
| io.flatMap { _ => | |
| println("Adding file to archive: " + file.getName) | |
| archive.putArchiveEntry(new ZipArchiveEntry(file, file.getName)) | |
| fromAutoCloseable(IO(new FileInputStream(file))) use { x => | |
| IOUtils.copy(x, archive) | |
| archive.closeArchiveEntry() | |
| IO.unit | |
| } | |
| } | |
| } | |
| for { | |
| _ <- IO(println(s"zipFiles sourceFolder: $sourceFolder destFolder: $destFolder zipFileName: $zipFileName extension: $extension")) | |
| path <- IO(destFolder + "/" + zipFileName) | |
| _ <- fromAutoCloseable(IO(new ArchiveStreamFactory().createArchiveOutputStream("zip", new FileOutputStream(path)))) use { archive => | |
| for { | |
| l <- getListByExtension(sourceFolder, extension) | |
| _ <- zipFileList(l, archive) | |
| } yield () | |
| } | |
| } yield path | |
| } | |
| } |
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