(refs #28)Avatar image can be uploaded at the account editing page.

src/main/scala/util/FileUploadUtil.scala

@@ -0,0 +1,33 @@
+package util
+
+import java.text.SimpleDateFormat
+import javax.servlet.http.HttpSession
+import util.Directory._
+import org.apache.commons.io.FileUtils
+
+object FileUploadUtil {
+
+  def generateFileId: String =
+    new SimpleDateFormat("yyyyMMddHHmmSSsss").format(new java.util.Date(System.currentTimeMillis))
+
+  def TemporaryDir(implicit session: HttpSession): java.io.File =
+    new java.io.File(GitBucketHome, "tmp/_upload/%s".format(session.getId))
+
+  def getTemporaryFile(fileId: String)(implicit session: HttpSession): java.io.File =
+    new java.io.File(TemporaryDir, fileId)
+
+  def removeTemporaryFile(fileId: String)(implicit session: HttpSession): Unit =
+    getTemporaryFile(fileId).delete()
+
+  def removeTemporaryFiles()(implicit session: HttpSession): Unit =
+    FileUtils.deleteDirectory(TemporaryDir)
+
+  def getUploadedFilename(fileId: String)(implicit session: HttpSession): Option[String] = {
+    val filename = Option(session.getAttribute("upload_" + fileId).asInstanceOf[String])
+    if(filename.isDefined){
+      session.removeAttribute("upload_" + fileId)
+    }
+    filename
+  }
+
+}