Added URL session. Added sorts. Added transforms.

Sources/SwiftBoost/CoreGraphics/Extensions/CGAffineTransformExtension.swift

@@ -6,5 +6,17 @@ public extension CGAffineTransform {
     init(scale: CGFloat) {
         self.init(scaleX: scale, y: scale)
     }
+
+    init(rotationDegress: CGFloat) {
+        self.init(rotationAngle: CGFloat(rotationDegress * .pi / 180))
+    }
+
+    func scaledBy(xy: CGFloat) -> CGAffineTransform {
+        return self.scaledBy(x: xy, y: xy)
+    }
+
+    func rotated(degress: CGFloat) -> CGAffineTransform {
+        return self.rotated(by: CGFloat(degress * .pi / 180))
+    }
 }
 #endif

Sources/SwiftBoost/Foundation/Extensions/MutableCollectionExtension.swift

@@ -0,0 +1,41 @@
+import Foundation
+
+public extension MutableCollection where Self: RandomAccessCollection {
+
+    func sorted<Value>(
+        by keyPath: KeyPath<Element, Value>,
+        using valuesAreInIncreasingOrder: (Value, Value) throws -> Bool
+    ) rethrows -> [Element] {
+        try sorted {
+            try valuesAreInIncreasingOrder($0[keyPath: keyPath], $1[keyPath: keyPath])
+        }
+    }
+
+    func sorted<Value: Comparable>(
+        by keyPath: KeyPath<Element, Value>,
+        order: MutableCollectionOrder<Value>
+    ) -> [Element] {
+        sorted(by: keyPath, using: order.operator)
+    }
+}
+
+public enum MutableCollectionOrder<Value: Comparable> {
+
+    // MARK: - Cases
+
+    /// Represents ascending order. In this case, the associated operator function is `<`.
+    case ascending
+    /// Represents descending order. In this case, the associated operator function is `>`.
+    case descending
+
+    // MARK: - Properties
+
+    public var `operator`: (Value, Value) -> Bool {
+        switch self {
+        case .ascending:
+            return (<)
+        case .descending:
+            return (>)
+        }
+    }
+}

Sources/SwiftBoost/Foundation/Extensions/URLExtension.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+public extension URL {
+
+    static var empty: URL {
+        return URL(string: "https://apple.com")!
+    }
+}

Sources/SwiftBoost/Foundation/Extensions/URLSessionExtension.swift

@@ -0,0 +1,62 @@
+import Foundation
+
+public extension URLSession {
+
+    enum AppError: Error {
+
+        case invalidURL(String)
+        case networkError(Error)
+        case noResponse
+        case decodingError(Error)
+
+        public func errorMessage() -> String {
+            switch self {
+            case .invalidURL(let str):
+                return "badURL: \(str)"
+            case .networkError(let error):
+                return "networkError: \(error)"
+            case .noResponse:
+                return "no network response"
+            case .decodingError(let error):
+                return "decoding error: \(error)"
+            }
+        }
+    }
+
+    enum HTTPMethod {
+
+        case get
+
+        var id: String {
+            switch self {
+            case .get: return "get"
+            }
+        }
+    }
+
+    static func request(
+        url: String,
+        method: HTTPMethod,
+        completion: @escaping (AppError?, Data?, HTTPURLResponse?) ->Void)
+    {
+        guard let url = URL(string: url) else {
+            completion(AppError.invalidURL(url), nil, nil)
+            return
+        }
+
+        var request = URLRequest(url: url)
+        request.httpMethod = method.id
+        URLSession.shared.dataTask(with: request) { (data, response, error) in
+            guard let response = response as? HTTPURLResponse else {
+                completion(AppError.noResponse, nil, nil)
+                return
+            }
+
+            if let error = error {
+                completion(AppError.networkError(error), nil, response)
+            } else if let data = data {
+                completion(nil, data, response)
+            }
+        }.resume()
+    }
+}