refactor: remove duplicate settings serialisation work

1 files changed, 43 insertions, 0 deletions

diff --git a/Sora/Data/Settings/SettingsCodec.swift b/Sora/Data/Settings/SettingsCodec.swift
new file mode 100644
index 0000000..4ec361a
--- /dev/null
+++ b/Sora/Data/Settings/SettingsCodec.swift
@@ -0,0 +1,43 @@
+import Foundation
+import SwiftUI
+
+@MainActor
+enum SettingsCodec {
+  private static let sharedJSONEncoder = JSONEncoder()
+  private static let sharedJSONDecoder = JSONDecoder()
+
+  static func encode<T: Encodable>(_ value: T) -> Data? {
+    try? sharedJSONEncoder.encode(value)
+  }
+
+  static func decode<T: Decodable>(_ type: T.Type, from data: Data) -> T? {
+    try? sharedJSONDecoder.decode(type, from: data)
+  }
+
+  static func encodeOnce<T: Encodable>(_ value: T) -> (value: T, encodedData: Data)? {
+    guard let encodedData = encode(value) else { return nil }
+
+    return (value: value, encodedData: encodedData)
+  }
+
+  @discardableResult
+  static func applyIfChanged(
+    encodedData: Data,
+    localData: Binding<Data>,
+    key: String,
+    enableSync: Bool
+  ) -> Bool {
+    guard localData.wrappedValue != encodedData else {
+      return false
+    }
+
+    localData.wrappedValue = encodedData
+
+    if enableSync {
+      NSUbiquitousKeyValueStore.default.set(encodedData, forKey: key)
+      NSUbiquitousKeyValueStore.default.synchronize()
+    }
+
+    return true
+  }
+}