Initial code commit

Added implementation

HTTPStatusCodes.swift

@@ -0,0 +1,166 @@
+//
+//  HTTPStatusCodes.swift
+//
+//  Created by Richard Hodgkins on 11/01/2015.
+//  Copyright (c) 2015 Richard Hodgkins. All rights reserved.
+//
+
+import Foundation
+
+/**
+    HTTP status codes as per http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
+
+    The RF2616 standard is completely covered (http://www.ietf.org/rfc/rfc2616.txt)
+ */
+public enum HTTPStatusCode : Int {
+    // Informational
+    case Continue = 100
+    case SwitchingProtocols = 101
+    case Processing = 102
+
+    // Success
+    case OK = 200
+    case Created = 201
+    case Accepted = 202
+    case NonAuthoritativeInformation = 203
+    case NoContent = 204
+    case ResetContent = 205
+    case PartialContent = 206
+    case MultiStatus = 207
+    case AlreadyReported = 208
+    case IMUsed = 226
+
+    // Redirections
+    case MultipleChoices = 300
+    case MovedPermanently = 301
+    case Found = 302
+    case SeeOther = 303
+    case NotModified = 304
+    case UseProxy = 305
+    case SwitchProxy = 306
+    case TemporaryRedirect = 307
+    case PermanentRedirect = 308
+
+    // Client Errors
+    case BadRequest = 400
+    case Unauthorized = 401
+    case PaymentRequired = 402
+    case Forbidden = 403
+    case NotFound = 404
+    case MethodNotAllowed = 405
+    case NotAcceptable = 406
+    case ProxyAuthenticationRequired = 407
+    case RequestTimeout = 408
+    case Conflict = 409
+    case Gone = 410
+    case LengthRequired = 411
+    case PreconditionFailed = 412
+    case RequestEntityTooLarge = 413
+    case RequestURITooLong = 414
+    case UnsupportedMediaType = 415
+    case RequestedRangeNotSatisfiable = 416
+    case ExpectationFailed = 417
+    case ImATeapot = 418
+    case AuthenticationTimeout = 419
+    case UnprocessableEntity = 422
+    case Locked = 423
+    case FailedDependency = 424
+    case UpgradeRequired = 426
+    case PreconditionRequired = 428
+    case TooManyRequests = 429
+    case RequestHeaderFieldsTooLarge = 431
+    case LoginTimeout = 440
+    case NoResponse = 444
+    case RetryWith = 449
+    case UnavailableForLegalReasons = 451
+    case RequestHeaderTooLarge = 494
+    case CertError = 495
+    case NoCert = 496
+    case HTTPToHTTPS = 497
+    case TokenExpired = 498
+    case ClientClosedRequest = 499
+
+    // Server Errors
+    case InternalServerError = 500
+    case NotImplemented = 501
+    case BadGateway = 502
+    case ServiceUnavailable = 503
+    case GatewayTimeout = 504
+    case HTTPVersionNotSupported = 505
+    case VariantAlsoNegotiates = 506
+    case InsufficientStorage = 507
+    case LoopDetected = 508
+    case BandwidthLimitExceeded = 509
+    case NotExtended = 510
+    case NetworkAuthenticationRequired = 511
+    case NetworkTimeoutError = 599
+}
+
+public extension HTTPStatusCode {
+    /// Informational - Request received, continuing process.
+    public var isInformational: Bool {
+        return inRange(100...200)
+    }
+    /// Success - The action was successfully received, understood, and accepted.
+    public var isSuccess: Bool {
+        return inRange(200...299)
+    }
+    /// Redirection - Further action must be taken in order to complete the request.
+    public var isRedirection: Bool {
+        return inRange(300...399)
+    }
+    /// Client Error - The request contains bad syntax or cannot be fulfilled.
+    public var isClientError: Bool {
+        return inRange(400...499)
+    }
+    /// Server Error - The server failed to fulfill an apparently valid request.
+    public var isServerError: Bool {
+        return inRange(500...599)
+    }
+
+    /// :returns: true if the status code is in the provided range, false otherwise.
+    private func inRange(range: Range<Int>) -> Bool {
+        return contains(range, rawValue)
+    }
+}
+
+public extension HTTPStatusCode {
+    public var localizedReasonPhrase: String {
+        return NSHTTPURLResponse.localizedStringForStatusCode(rawValue)
+    }
+}
+
+// MARK: - Printing
+
+extension HTTPStatusCode: DebugPrintable, Printable {
+    public var description: String {
+        return "\(rawValue) - \(localizedReasonPhrase)"
+    }
+    public var debugDescription: String {
+        return "HTTPStatusCode:\(description)"
+    }
+}
+
+// MARK: - HTTP URL Response
+
+public extension HTTPStatusCode {
+    /// Obtains a possible status code from an optional HTTP URL response.
+    public init?(HTTPResponse: NSHTTPURLResponse?) {
+        if let value = HTTPResponse?.statusCode {
+            self.init(rawValue: value)
+        } else {
+            return nil
+        }
+    }
+}
+
+public extension NSHTTPURLResponse {
+    public var statusCodeValue: HTTPStatusCode? {
+        return HTTPStatusCode(HTTPResponse: self)
+    }
+
+    @availability(iOS, introduced=7.0)
+    public convenience init?(URL url: NSURL, statusCode: HTTPStatusCode, HTTPVersion: String?, headerFields: [NSObject : AnyObject]?) {
+        self.init(URL: url, statusCode: statusCode.rawValue, HTTPVersion: HTTPVersion, headerFields: headerFields)
+    }
+}