Added option to save as PNG

Sources/Options.swift

@@ -9,6 +9,12 @@
 import Foundation
 
 public struct Options {
+
+    public enum UIKitImageFormat {
+        case png
+        case jpg
+    }
+
     /// By default, files are saved into searchPathDirectory/folder
     public var searchPathDirectory: FileManager.SearchPathDirectory
     public var folder: String = (Bundle.main.bundleIdentifier ?? "").appending("/Default")

Sources/Storage+Image.swift

@@ -15,7 +15,19 @@
 public extension Storage {
     func save(object: Image, forKey key: String) throws {
         try commonSave(object: object as AnyObject, forKey: key, toData: {
-            return try unwrapOrThrow(Utils.data(image: object), StorageError.encodeData)
+            return try unwrapOrThrow(
+                Utils.data(image: object, uiKitImageFormat: .jpg),
+                StorageError.encodeData
+            )
+        })
+    }
+
+    func save(object: Image, uiKitImageFormat: Options.UIKitImageFormat, forKey key: String) throws {
+        try commonSave(object: object as AnyObject, forKey: key, toData: {
+            return try unwrapOrThrow(
+                Utils.data(image: object, uiKitImageFormat: uiKitImageFormat),
+                StorageError.encodeData
+            )
         })
     }
 

Sources/Storage.swift

@@ -63,6 +63,10 @@ public class Storage {
     public func fileUrl(forKey key: String) -> URL {
         return folderUrl.appendingPathComponent(key, isDirectory: false)
     }
+
+    public func fileList() throws -> [String] {
+        return try fileManager.contentsOfDirectory(atPath: folderUrl.path)
+    }
 }
 
 extension Storage {

Sources/Utils.swift

@@ -56,9 +56,14 @@ class Utils {
         #endif
     }
 
-    static func data(image: Image) -> Data? {
+    static func data(image: Image, uiKitImageFormat: Options.UIKitImageFormat) -> Data? {
         #if canImport(UIKit)
-            return image.jpegData(compressionQuality: 0.9)
+            switch uiKitImageFormat {
+            case .jpg:
+                return image.jpegData(compressionQuality: 0.9)
+            case .png:
+                return image.pngData()
+            }
         #elseif canImport(AppKit)
             return image.tiffRepresentation
         #else