Adds ability to change search provider

App/Settings/Settings.swift

@@ -0,0 +1,51 @@
+//
+//  Settings.swift
+//  App
+//
+//  Created by James Magahern on 3/9/21.
+//
+
+import Foundation
+
+@propertyWrapper
+public struct SettingProperty<T: RawRepresentable>
+{
+    public var key: String
+    public var defaultValue: T
+    public init(wrappedValue: T, key: String) {
+        self.key = key
+        self.defaultValue = wrappedValue
+    }
+    
+    public var wrappedValue: T {
+        get {
+            guard let rawValue = UserDefaults.standard.object(forKey: key) as? T.RawValue else { return defaultValue }
+            return T(rawValue: rawValue) ?? defaultValue
+        }
+        set {
+            UserDefaults.standard.setValue(newValue.rawValue, forKey: key)
+        }
+    }
+}
+
+class Settings
+{
+    static let shared = Settings()
+    
+    public enum SearchProviderSetting: String, CaseIterable {
+        case google         = "Google"
+        case duckduckgo     = "DuckDuckGo"
+        case searxnor       = "Searx.nor"
+        
+        func provider() -> SearchProvider {
+            switch self {
+                case .google:     return SearchProvider.google
+                case .duckduckgo: return SearchProvider.duckduckgo
+                case .searxnor:   return SearchProvider.searxnor
+            }
+        }
+    }
+    
+    @SettingProperty(key: "searchProvider")
+    public var searchProvider: SearchProviderSetting = .searxnor
+}