PascalCase decoding strategy

Sources/JellyKit/Client.swift

@@ -7,23 +7,31 @@
 
 import Foundation
 
-struct Client {
+/// Every `Request` must pass through this `Client`.
+/// Manages merging `Request` and default headers as well as creating the `URLRequest`.
+/// Provides its own `JSONDecoder` and `JSONEncoder` with a PascalCase `CodingKey` strategy.
+public struct Client {
   // MARK: - Properties
+  private let server: String
   private let session: URLSession
   private let defaultHeaders: [String:String]
-  private let server: String
   private let decoder: JSONDecoder = .init()
   private let encoder: JSONEncoder = .init()
   
   // MARK: - Functions
-  init(server: String, session: URLSession = .shared, headers: [String:String] = [:]) {
+  public init(server: String, session: URLSession = .shared, headers: [String:String] = [:]) {
     self.server = server
     self.session = session
     self.defaultHeaders = headers
+    
+    decoder.keyDecodingStrategy = .convertFromPascalCase
   }
   
+  /// When all a client needs is the HTTP status code of an endpoint, this function should be used.
+  /// - Parameter request: Any Emby or Jellyfin `Request` conforming to the `Request` protocol.
+  /// - Throws:`RequestError.invalidResponse` if the response could not be coerced into a `HTTPURLResponse`.
+  /// - Returns: The HTTP status code.
   func statusRequest(_ request: any Request) async throws -> Int {
-    do {
     let urlRequest = try createRequestObject(for: request)
     let (_, response) = try await session.data(for: urlRequest)
     guard let response = response as? HTTPURLResponse else {
@@ -31,25 +39,27 @@ struct Client {
     }
     
     return response.statusCode
-    } catch {
-      throw RequestError.unknown(message: error.localizedDescription)
-    }
   }
   
+  /// Sends a request to an Emby or Jellyfin server, and builds a model object from that response.
+  /// - Parameter request: Any Emby or Jellyfin `Request` conforming to the `Request` protocol.
+  /// - Throws:`RequestError.invalidResponse` if the response could not be coerced into a `HTTPURLResponse`.
+  /// - Returns: A `Codable` model object whose type is infered from the receiving variable.
   func dataRequest<T>(_ request: any Request) async throws -> T? where T: Codable {
-    do {
     let urlRequest = try createRequestObject(for: request)
     let (data, response) = try await session.data(for: urlRequest)
-      guard let response = response as? HTTPURLResponse else {
+    guard response is HTTPURLResponse else {
       throw RequestError.invalidResponse
     }
     
     return try decoder.decode(T.self, from: data)
-    } catch {
-      throw RequestError.unknown(message: error.localizedDescription)
-    }
   }
   
+  /// Verifies and creates a `URLRequest` from information provided by the `Request`.
+  /// Merges the `Request` headers, if any, with the default headers.
+  /// - Parameter request: Any Emby or Jellyfin `Request` conforming to the `Request` protocol.
+  /// - Throws: `RequestError.badURL` if unable to create a `URL` from the string.
+  /// - Returns: A fully formed `URLRequest` ready to send.
   private func createRequestObject(for request: Request) throws -> URLRequest {
     guard let url = URL(string: "\(server)\(request.endpoint)") else {
       throw RequestError.badURL
@@ -60,7 +70,7 @@ struct Client {
     }
     
     var urlRequest = URLRequest(url: url)
-    urlRequest.httpMethod = request.method
+    urlRequest.httpMethod = request.method.rawValue
     urlRequest.allHTTPHeaderFields = headers
     return urlRequest
   }

Sources/JellyKit/Enums/RequestMethod.swift

@@ -0,0 +1,15 @@
+//
+//  RequestMethod.swift
+//  JellyKit
+//
+//  Created by Alex Loren on 10/19/26.
+//
+
+/// What method should be used when sending a `Request` to Emby or Jellyfin.
+/// Usage of this enum prevents any chance of misspelling the method.
+public enum RequestMethod: String {
+  case get = "GET"
+  case head = "HEAD"
+  case post = "POST"
+  case delete = "DELETE"
+}

Sources/JellyKit/Extensions/PascalCaseKey+KeyDecodingStrategy.swift

@@ -0,0 +1,39 @@
+//
+//  PascalCaseKey+KeyDecodingStrategy.swift
+//  JellyKit
+//
+//  Created by Alex Loren on 10/19/26.
+//
+
+import Foundation
+
+extension JSONDecoder.KeyDecodingStrategy {
+  // MARK: - Computed Properties
+  
+  /// A key decoding strategy that converts pascal-case keys to camel-case keys.
+  static var convertFromPascalCase: Self {
+    .custom { codingPath in
+      let key = codingPath.last!.stringValue
+      let converted = key.prefix(1).lowercased() + key.dropFirst()
+      return PascalCaseKey(stringValue: converted)
+    }
+  }
+}
+
+/// Simply a reusable `CodingKey` for converting PascalCase to camelCase.
+private struct PascalCaseKey: CodingKey {
+  // MARK: - Properties
+  let stringValue: String
+  let intValue: Int?
+
+  // MARK: - Functions
+  init(stringValue: String) {
+    self.stringValue = stringValue
+    intValue = nil
+  }
+  
+  init?(intValue: Int) {
+    stringValue = String(intValue)
+    self.intValue = intValue
+  }
+}

Sources/JellyKit/Models/User.swift

@@ -5,18 +5,24 @@
 //  Created by Alex Loren on 10/13/26.
 //
 
+/// Contains the information of any `User` that is reported back by Emby or Jellyfin.
+/// This model does not currently contain all data reported by the server.
+/// Properties will become available as needed, not prior.
 struct User: Codable {
-  var id: String
-  var serverId: String
-  var name: String
-  var hasPassword: Bool
-  var primaryImageTag: String
+  // MARK: - Properties
   
-  enum CodingKeys: String, CodingKey {
-    case id = "Id"
-    case serverId = "ServerId"
-    case name = "Name"
-    case hasPassword = "HasPassword"
-    case primaryImageTag = "PrimaryImageTag"
-  }
+  /// A server generated unique Id for the `User`.
+  var id: String
+  
+  /// The `User` belongs to the server with this Id.
+  var serverId: String
+  
+  /// A `User` or server administer given name
+  var name: String
+  
+  /// If `true` the `User` must be authenticated before making requests on their behalf.
+  var hasPassword: Bool
+  
+  /// If not `nil` a request can be made to retreive the profile image for the `User`.
+  var primaryImageTag: String?
 }

Sources/JellyKit/Protocols/Request.swift

@@ -5,11 +5,18 @@
 //  Created by Alex Loren on 10/13/26.
 //
 
-import Foundation
-
+/// The base for any `Request` made by JellyKit
 protocol Request {
   // MARK: - Properties
+  
+  /// This must begin with a forward slash.
+  /// Points to the resource on the Emby or Jellyfin server.
   var endpoint: String { get set }
-  var method: String { get set }
+  
+  /// What should this request be sent as?
+  var method: RequestMethod { get set }
+  
+  /// Any additional headers that are specific to *this* request.
+  /// Headers needed for every reqeust should be set at `Client` creation.
   var headers: [String:String]? { get set }
 }

Sources/JellyKit/Requests/PingRequest.swift

@@ -0,0 +1,16 @@
+//
+//  PingRequest.swift
+//  JellyKit
+//
+//  Created by Alex Loren on 10/19/26.
+//
+
+/// Sends a ping to the Emby or Jellyfin server.
+/// Should be used exclusively with the `Client.statusRequest` function.
+/// The server will respond with a code of 200 and a body string when successful.
+struct PingRequest: Request {
+  // MARK: - Properties
+  var endpoint: String = "/System/Ping"
+  var method: RequestMethod = .get
+  var headers: [String : String]? = nil
+}