feat(tvos): Add TopShelf Extension (#1561)

modules/top-shelf-cache/ios/TopShelfCacheModule.swift

@@ -0,0 +1,112 @@
+import ExpoModulesCore
+import Foundation
+import Security
+#if canImport(TVServices)
+import TVServices
+#endif
+
+public class TopShelfCacheModule: Module {
+  private let appGroupInfoPlistKey = "StreamyfinAppGroupIdentifier"
+  private let keychainAccessGroupInfoPlistKey = "StreamyfinKeychainAccessGroupIdentifier"
+  private let cacheKey = "TopShelfCache"
+  private let apiKeyService = "StreamyfinTopShelf"
+  private let apiKeyAccount = "JellyfinApiKey"
+  private var appGroupIdentifier: String? {
+    if let appGroupIdentifier = Bundle.main.object(
+      forInfoDictionaryKey: appGroupInfoPlistKey
+    ) as? String {
+      return appGroupIdentifier
+    }
+
+    guard let bundleIdentifier = Bundle.main.bundleIdentifier else {
+      return nil
+    }
+
+    return "group.\(bundleIdentifier)"
+  }
+  private var keychainAccessGroupIdentifier: String? {
+    Bundle.main.object(forInfoDictionaryKey: keychainAccessGroupInfoPlistKey) as? String
+  }
+
+  public func definition() -> ModuleDefinition {
+    Name("TopShelfCache")
+
+    Function("writeCache") { (json: String, apiKey: String?) -> Bool in
+      guard
+        let appGroupIdentifier = appGroupIdentifier,
+        let defaults = UserDefaults(suiteName: appGroupIdentifier)
+      else {
+        return false
+      }
+
+      defaults.set(json, forKey: cacheKey)
+      defaults.set(Date().timeIntervalSince1970, forKey: "\(cacheKey)UpdatedAt")
+      defaults.synchronize()
+      let didSaveAPIKey = saveAPIKey(apiKey)
+
+      #if canImport(TVServices)
+      TVTopShelfContentProvider.topShelfContentDidChange()
+      #endif
+
+      return didSaveAPIKey
+    }
+
+    Function("clearCache") { () -> Bool in
+      guard
+        let appGroupIdentifier = appGroupIdentifier,
+        let defaults = UserDefaults(suiteName: appGroupIdentifier)
+      else {
+        return false
+      }
+
+      defaults.removeObject(forKey: cacheKey)
+      defaults.removeObject(forKey: "\(cacheKey)UpdatedAt")
+      defaults.synchronize()
+      let didDeleteAPIKey = deleteAPIKey()
+
+      #if canImport(TVServices)
+      TVTopShelfContentProvider.topShelfContentDidChange()
+      #endif
+
+      return didDeleteAPIKey
+    }
+  }
+
+  private func baseAPIKeyQuery() -> [String: Any] {
+    var query: [String: Any] = [
+      kSecClass as String: kSecClassGenericPassword,
+      kSecAttrService as String: apiKeyService,
+      kSecAttrAccount as String: apiKeyAccount
+    ]
+
+    if let keychainAccessGroupIdentifier {
+      query[kSecAttrAccessGroup as String] = keychainAccessGroupIdentifier
+    }
+
+    return query
+  }
+
+  private func saveAPIKey(_ apiKey: String?) -> Bool {
+    guard deleteAPIKey() else {
+      return false
+    }
+
+    guard
+      let apiKey,
+      !apiKey.isEmpty,
+      let data = apiKey.data(using: .utf8)
+    else {
+      return true
+    }
+
+    var query = baseAPIKeyQuery()
+    query[kSecValueData as String] = data
+    let status = SecItemAdd(query as CFDictionary, nil)
+    return status == errSecSuccess
+  }
+
+  private func deleteAPIKey() -> Bool {
+    let status = SecItemDelete(baseAPIKeyQuery() as CFDictionary)
+    return status == errSecSuccess || status == errSecItemNotFound
+  }
+}