Merge pull request #5 from hyperoslo/feature/cachable

Add Cachable protocol

Author: vadymmarkov

Pod/Pod.xcodeproj/project.pbxproj

@@ -11,6 +11,7 @@
 		D520D4B01BBC4770001A2A31 /* MemoryCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = D520D4AF1BBC4770001A2A31 /* MemoryCache.swift */; settings = {ASSET_TAGS = (); }; };
 		D520D4B21BBC47A2001A2A31 /* DiskCache.swift in Sources */ = {isa = PBXBuildFile; fileRef = D520D4B11BBC47A2001A2A31 /* DiskCache.swift */; settings = {ASSET_TAGS = (); }; };
 		D520D4B61BBC4D0B001A2A31 /* CacheAware.swift in Sources */ = {isa = PBXBuildFile; fileRef = D520D4B51BBC4D0B001A2A31 /* CacheAware.swift */; settings = {ASSET_TAGS = (); }; };
+		D520D4BB1BBEB59D001A2A31 /* Cachable.swift in Sources */ = {isa = PBXBuildFile; fileRef = D520D4BA1BBEB59D001A2A31 /* Cachable.swift */; settings = {ASSET_TAGS = (); }; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -26,6 +27,7 @@
 		D520D4AF1BBC4770001A2A31 /* MemoryCache.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MemoryCache.swift; sourceTree = "<group>"; };
 		D520D4B11BBC47A2001A2A31 /* DiskCache.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = DiskCache.swift; sourceTree = "<group>"; };
 		D520D4B51BBC4D0B001A2A31 /* CacheAware.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CacheAware.swift; sourceTree = "<group>"; };
+		D520D4BA1BBEB59D001A2A31 /* Cachable.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Cachable.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -95,6 +97,7 @@
 				D520D4AF1BBC4770001A2A31 /* MemoryCache.swift */,
 				D520D4B11BBC47A2001A2A31 /* DiskCache.swift */,
 				D520D4B51BBC4D0B001A2A31 /* CacheAware.swift */,
+				D520D4BA1BBEB59D001A2A31 /* Cachable.swift */,
 			);
 			name = Source;
 			path = ../Source;
@@ -170,6 +173,7 @@
 			files = (
 				D520D4B01BBC4770001A2A31 /* MemoryCache.swift in Sources */,
 				D520D4B21BBC47A2001A2A31 /* DiskCache.swift in Sources */,
+				D520D4BB1BBEB59D001A2A31 /* Cachable.swift in Sources */,
 				D520D4B61BBC4D0B001A2A31 /* CacheAware.swift in Sources */,
 				14A139B41AEFC72B00AD732F /* Tests.swift in Sources */,
 			);

Source/Cachable.swift

@@ -0,0 +1,18 @@
+import Foundation
+
+public protocol Cachable: AnyObject {}
+
+public extension Cachable {
+  func encode() -> NSData {
+    var value = self
+    return withUnsafePointer(&value) { p in
+      NSData(bytes: p, length: sizeofValue(value))
+    }
+  }
+
+  static func decode<T: Cachable>(data: NSData) -> T {
+    let pointer = UnsafeMutablePointer<T>.alloc(sizeof(T.Type))
+    data.getBytes(pointer, length: sizeof(T))
+    return pointer.move()
+  }
+}

Source/CacheAware.swift

@@ -1,22 +1,3 @@
-import Foundation
-
-public protocol Cachable: AnyObject {}
-
-public extension Cachable {
-  func encode() -> NSData {
-    var value = self
-    return withUnsafePointer(&value) { p in
-      NSData(bytes: p, length: sizeofValue(value))
-    }
-  }
-
-  static func decode<T: Cachable>(data: NSData) -> T {
-    let pointer = UnsafeMutablePointer<T>.alloc(sizeof(T.Type))
-    data.getBytes(pointer, length: sizeof(T))
-    return pointer.move()
-  }
-}
-
 public protocol CacheAware {
   var prefix: String { get }
   var path: String { get }

Source/DiskCache.swift

@@ -17,6 +17,15 @@ public class DiskCache: CacheAware {
   // MARK: - CacheAware
 
   public func add<T: Cachable>(key: String, object: T) {
+    if !fileManager.fileExistsAtPath(path) {
+      do {
+        try fileManager.createDirectoryAtPath(path,
+          withIntermediateDirectories: true, attributes: nil)
+      } catch _ {}
+    }
+
+    fileManager.createFileAtPath(filePath(key),
+      contents: object.encode(), attributes: nil)
   }
 
   public func object<T: Cachable>(key: String) -> T? {
@@ -28,4 +37,10 @@ public class DiskCache: CacheAware {
 
   public func clear() {
   }
+
+  // MARK: - Helpers
+
+  private func filePath(key: String) -> String {
+    return "\(path)/key"
+  }
 }