[AltServer] Supports Install/Remove provisioning profiles requests

Stuff I shoulda committed

AltKit/CodableServerError.swift

@@ -0,0 +1,58 @@
+//
+//  CodableServerError.swift
+//  AltKit
+//
+//  Created by Riley Testut on 3/5/20.
+//  Copyright © 2020 Riley Testut. All rights reserved.
+//
+
+import Foundation
+
+// Can only automatically conform ALTServerError.Code to Codable, not ALTServerError itself
+extension ALTServerError.Code: Codable {}
+
+struct CodableServerError: Codable
+{
+    var error: ALTServerError {
+        return ALTServerError(self.errorCode, userInfo: self.userInfo ?? [:])
+    }
+    
+    private var errorCode: ALTServerError.Code
+    private var userInfo: [String: String]?
+    
+    private enum CodingKeys: String, CodingKey
+    {
+        case errorCode
+        case userInfo
+    }
+
+    init(error: ALTServerError)
+    {
+        self.errorCode = error.code
+        
+        let userInfo = error.userInfo.compactMapValues { $0 as? String }
+        if !userInfo.isEmpty
+        {
+            self.userInfo = userInfo
+        }
+    }
+    
+    init(from decoder: Decoder) throws
+    {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        
+        let errorCode = try container.decode(Int.self, forKey: .errorCode)
+        self.errorCode = ALTServerError.Code(rawValue: errorCode) ?? .unknown
+        
+        let userInfo = try container.decodeIfPresent([String: String].self, forKey: .userInfo)
+        self.userInfo = userInfo
+    }
+    
+    func encode(to encoder: Encoder) throws
+    {
+        var container = encoder.container(keyedBy: CodingKeys.self)
+        try container.encode(self.error.code.rawValue, forKey: .errorCode)
+        try container.encodeIfPresent(self.userInfo, forKey: .userInfo)
+    }
+}
+