[Add] #311 앱스토어에 등록된 앱의 최신 버전을 가져오는 함수

Projects/App/Sources/AppStoreCheck.swift

@@ -0,0 +1,51 @@
+//
+//  AppStoreCheck.swift
+//  App
+//
+//  Created by Jisoo Ham on 5/26/24.
+//  Copyright © 2024 Pepsi-Club. All rights reserved.
+//
+
+import UIKit
+
+import Core
+
+public final class AppStoreCheck {
+
+    /// 프로젝트 버전
+    let appVersion = String.getCurrentVersion()
+
+    /// 앱스토어에 등록된 앱의 ID
+    static let appleID = Bundle.main.object(forInfoDictionaryKey: "APPLE_ID") as? String
+
+    /// 앱스토어 연결 링크
+    static let appStoreURLString
+    = "itms-apps://itunes.apple.com/app/apple-store/"
+
+    /// 앱스토어에 등록된 최신 버전 가져오는 함수
+    static public func latestVersion(completion: @escaping (String?) -> Void) {
+        guard let appleID = AppStoreCheck.appleID,
+              let url = URL(
+                string: "https://itunes.apple.com/lookup?id=\(appleID)&country=kr"
+              )
+        else { return }
+
+        let task = URLSession.shared.dataTask(with: url) { data, response, err in
+            guard let data,
+                  let json = try? JSONSerialization.jsonObject(
+                    with: data,
+                    options: .allowFragments
+                  ) as? [String: Any],
+                  let results = json["results"] as? [[String: Any]],
+                  let appStoreVersion = results[0]["version"] as? String
+            else {
+                completion(nil)
+                return
+            }
+
+            completion(appStoreVersion)
+        }
+
+        task.resume()
+    }
+}