Implemented: Downloading tagged contents as zip file.

src/main/scala/util/CompressUtil.scala

@@ -0,0 +1,32 @@
+package util
+
+import java.io.File
+import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream
+import org.apache.commons.compress.archivers.zip.ZipArchiveEntry
+import org.apache.commons.io.FileUtils
+import org.apache.commons.io.IOUtils
+
+object CompressUtil {
+
+  def zip(dest: File, dir: File): Unit = {
+    def addDirectoryToZip(out: ZipArchiveOutputStream, dir: File, path: String): Unit = {
+      dir.listFiles.map { file =>
+        if(file.isFile){
+          out.putArchiveEntry(new ZipArchiveEntry(path + "/" + file.getName))
+          out.write(FileUtils.readFileToByteArray(file))
+          out.closeArchiveEntry
+        } else if(file.isDirectory){
+          addDirectoryToZip(out, file, path + "/" + file.getName)
+        }
+      }
+    }
+      
+    val out = new ZipArchiveOutputStream(dest)
+    try {
+      addDirectoryToZip(out, dir, dir.getName)
+    } finally {
+      IOUtils.closeQuietly(out)
+    }
+  }
+
+}