From e9ea2ab850a5251369217b48fd99b65ef4b6985d Mon Sep 17 00:00:00 2001
From: Zach Smith <zach@driver.xyz>
Date: Thu, 27 Apr 2017 11:55:16 -0700
Subject: Split FileStorage implementations into separate files

---
 .../scala/xyz/driver/core/file/S3Storage.scala     | 64 ++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 src/main/scala/xyz/driver/core/file/S3Storage.scala

(limited to 'src/main/scala/xyz/driver/core/file/S3Storage.scala')

diff --git a/src/main/scala/xyz/driver/core/file/S3Storage.scala b/src/main/scala/xyz/driver/core/file/S3Storage.scala
new file mode 100644
index 0000000..50bfe85
--- /dev/null
+++ b/src/main/scala/xyz/driver/core/file/S3Storage.scala
@@ -0,0 +1,64 @@
+package xyz.driver.core.file
+
+import java.io.File
+import java.nio.file.{Path, Paths}
+import java.util.UUID.randomUUID
+
+import com.amazonaws.services.s3.AmazonS3
+import com.amazonaws.services.s3.model.{Bucket, GetObjectRequest, ListObjectsV2Request}
+import xyz.driver.core.{Name, Revision}
+import xyz.driver.core.time.Time
+
+import scala.concurrent.{ExecutionContext, Future}
+import scalaz.{ListT, OptionT}
+
+class S3Storage(s3: AmazonS3, bucket: Name[Bucket], executionContext: ExecutionContext) extends FileStorage {
+  implicit private val execution = executionContext
+
+  def upload(localSource: File, destination: Path): Future[Unit] = Future {
+    checkSafeFileName(destination) {
+      val _ = s3.putObject(bucket.value, destination.toString, localSource).getETag
+    }
+  }
+
+  def download(filePath: Path): OptionT[Future, File] =
+    OptionT.optionT(Future {
+      val tempDir             = System.getProperty("java.io.tmpdir")
+      val randomFolderName    = randomUUID().toString
+      val tempDestinationFile = new File(Paths.get(tempDir, randomFolderName, filePath.toString).toString)
+
+      if (!tempDestinationFile.getParentFile.mkdirs()) {
+        throw new Exception(s"Failed to create temp directory to download file `$tempDestinationFile`")
+      } else {
+        Option(s3.getObject(new GetObjectRequest(bucket.value, filePath.toString), tempDestinationFile)).map { _ =>
+          tempDestinationFile
+        }
+      }
+    })
+
+  def delete(filePath: Path): Future[Unit] = Future {
+    s3.deleteObject(bucket.value, filePath.toString)
+  }
+
+  def list(path: Path): ListT[Future, FileLink] =
+    ListT.listT(Future {
+      import scala.collection.JavaConverters._
+      val req = new ListObjectsV2Request().withBucketName(bucket.value).withPrefix(path.toString).withMaxKeys(2)
+
+      def isInSubFolder(path: Path)(fileLink: FileLink) =
+        fileLink.location.toString.replace(path.toString + "/", "").contains("/")
+
+      Iterator.continually(s3.listObjectsV2(req)).takeWhile { result =>
+        req.setContinuationToken(result.getNextContinuationToken)
+        result.isTruncated
+      } flatMap { result =>
+        result.getObjectSummaries.asScala.toList.map { summary =>
+          FileLink(Name[File](summary.getKey),
+                   Paths.get(path.toString + "/" + summary.getKey),
+                   Revision[File](summary.getETag),
+                   Time(summary.getLastModified.getTime),
+                   summary.getSize)
+        } filterNot isInSubFolder(path)
+      } toList
+    })
+}
-- 
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