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
+}

App/Settings/SettingsView.swift

@@ -23,12 +23,30 @@ struct SettingsView: View {
     @Environment(\.presentationMode)
         @Binding private var presentationMode
     
+    @State private var searchProvider = Settings.shared.searchProvider {
+        didSet { Settings.shared.searchProvider = searchProvider }
+    }
+    
     var body: some View {
         NavigationView {
             List {
                 Section(header: Text("Redirect Rules"), content: {
                     Text("To Do")
                 })
+                
+                Section(header: Text("Search Provider"), content: {
+                    ForEach(Settings.SearchProviderSetting.allCases, id: \.self, content: { setting in
+                        Button(action: { searchProvider = setting }, label: {
+                            HStack {
+                                Text(setting.rawValue)
+                                Spacer()
+                                if searchProvider == setting {
+                                    Image(systemName: "checkmark")
+                                }
+                            }
+                        }).buttonStyle(PlainButtonStyle())
+                    })
+                })
             }
             .listStyle(InsetGroupedListStyle())
             .navigationBarTitle("Settings", displayMode: .inline)