Add SwiftUI + Redux

Examples/SwiftUI + Redux/SwiftUIDemo/flux/reducers/UsersStateReducer.swift

@@ -0,0 +1,42 @@
+//
+//  UsersStateReducer.swift
+//  SwiftUIDemo
+//
+//  Created by Thomas Ricouard on 05/06/2019.
+//  Copyright © 2019 Thomas Ricouarf. All rights reserved.
+//
+
+import Foundation
+
+struct UserStateReducer: Reducer {    
+    func reduce(state: UsersState, action: Action) -> UsersState {
+        var state = state
+        switch action {
+        case UserActions.addUser:
+            state.users.append(User(id: state.users.count,
+                                    name: "New user \(state.users.count + 1)",
+                                    username: "@newuser\(state.users.count + 1)"))
+        case let UserActions.deleteUser(index):
+            state.users.remove(at: index)
+        case let UserActions.move(from, to):
+            let user = state.users.remove(at: from)
+            state.users.insert(user, at: to)
+        case let UserActions.editUser(id, name, username):
+            var user = state.users[id]
+            user.name = name
+            user.username = username
+            state.users[id] = user
+        case UserActions.testEditFirstUser:
+            if !state.users.isEmpty {
+                state.users[0] = User(id: 0, name: "user1", username: "u\ns\ne\nr\nn\na\nm\ne")
+            }
+        case UserActions.startEditUser:
+            state.isEditingUser = true
+        case UserActions.stopEditUser:
+            state.isEditingUser = false
+        default:
+            break
+        }
+        return state
+    }
+}