feature: urlsession을 이용한 서버통신 구현

Projects/Core/APIClient/Interface/APIRequestLoaderInterface.swift

@@ -7,10 +7,13 @@
 //
 
 import Foundation
+import KeychainClientInterface
 
 public protocol APIRequestLoaderInterface {
+  associatedtype T: TargetType
   func fetchData<M: Decodable> (
-    target: TargetType,
-    responseData: M.Type
+    target: T,
+    responseData: M.Type,
+    keychainClient: KeychainClient
   ) async throws -> M
 }

Projects/Core/APIClient/Sources/APIRequestLoader.swift

@@ -7,3 +7,54 @@
 //
 
 import Foundation
+import APIClientInterface
+import KeychainClientInterface
+
+public class APIRequestLoader<T: TargetType>: APIRequestLoaderInterface {
+  let coniguration: URLSessionConfiguration
+  let session: URLSession
+
+  public init(configuration: URLSessionConfiguration = .default) {
+    self.coniguration = configuration
+#if PROD
+    self.session = URLSession(configuration: configuration)
+#elseif DEV
+    let sessionDelegate = EventLoggerDelegate()
+    self.session = URLSession(configuration: configuration, delegate: sessionDelegate)
+#endif
+
+    // TODO: token interceptor
+  }
+
+  public func fetchData<M: Decodable>(
+    target: T,
+    responseData: M.Type,
+    keychainClient: KeychainClient
+  ) async throws -> M {
+    let urlRequest = try await target.asURLRequest(keychainClient: keychainClient)
+
+    let (data, response) = try await session.data(for: urlRequest)
+
+    guard let httpResponse = response as? HTTPURLResponse else {
+      throw NetworkError.noResponseError
+    }
+
+    switch httpResponse.statusCode {
+    case 200..<300:
+      do {
+        let decodedData = try JSONDecoder().decode(responseData, from: data)
+        return decodedData
+      } catch {
+        throw NetworkError.decodingError
+      }
+    case 401: // token interceptor 예정
+      throw NetworkError.authorizationError
+    case 400..<500:
+      throw NetworkError.requestError("bad request")
+    case 500..<600:
+      throw NetworkError.serverError
+    default:
+      throw NetworkError.unknownError
+    }
+  }
+}