Set password basic ui

src/SafeMessageStorage/SafeMessageStorage.sln.DotSettings

@@ -0,0 +1,2 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/CodeInspection/CodeAnnotations/NamespacesWithAnnotations/=SafeMessageStorage_002EAnnotations/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage.Android/SafeMessageStorage.Android.csproj

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
@@ -53,7 +53,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.3.0.908675" />
+    <PackageReference Include="Xamarin.Forms" Version="4.6.0.847" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
   </ItemGroup>
   <ItemGroup>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage.iOS/SafeMessageStorage.iOS.csproj

@@ -131,7 +131,7 @@
     <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.3.0.908675" />
+    <PackageReference Include="Xamarin.Forms" Version="4.6.0.847" />
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/App.xaml.cs

@@ -1,4 +1,6 @@
 using System;
+using SafeMessageStorage.Pages;
+using SafeMessageStorage.Services.AuthorizationService;
 using Xamarin.Forms;
 using Xamarin.Forms.Xaml;
 namespace SafeMessageStorage
@@ -9,7 +11,7 @@ namespace SafeMessageStorage
         public App()
         {
             InitializeComponent();
-            MainPage = new AppShell();
+            MainPage = new NavigationPage(new AuthorizationPage(new AuthorizationServiceMOCK()));
         }
 
         protected override void OnStart()

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/AppShell.xaml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Shell xmlns="http://xamarin.com/schemas/2014/forms" 
-       xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-       xmlns:d="http://xamarin.com/schemas/2014/forms/design"
-       xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-       mc:Ignorable="d"
-       xmlns:pages="clr-namespace:SafeMessageStorage.Pages;assembly=SafeMessageStorage"
-       Title="SafeMessageStorage"
-       x:Class="SafeMessageStorage.AppShell">
-    <ShellItem>
-        <ShellContent Title="Authorize"  ContentTemplate ="{DataTemplate pages:AuthorizationPage}"></ShellContent>
-    </ShellItem>
-</Shell>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/AppShell.xaml.cs

@@ -1,15 +0,0 @@
-using System;
-using System.Collections.Generic;
-
-using Xamarin.Forms;
-
-namespace SafeMessageStorage
-{
-    public partial class AppShell : Xamarin.Forms.Shell
-    {
-        public AppShell()
-        {
-            InitializeComponent();
-        }
-    }
-}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Models/Message.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SafeMessageStorage.Models
+{
+    public class Message
+    {
+        public Message(string title, string content, DateTimeOffset? timeOfCreation = null)
+        {
+            Title = title;
+            Content = content;
+            TimeOfCreation = timeOfCreation ?? DateTimeOffset.Now;
+        }
+
+        public  string Title { get; }
+
+        public string Content { get;  }
+
+        public DateTimeOffset TimeOfCreation { get; }
+
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Pages/AuthorizationPage.xaml

@@ -7,10 +7,14 @@
              x:Class="SafeMessageStorage.Pages.AuthorizationPage"
              Title="Authorize">
     <ContentPage.Content>
-        <StackLayout>
+        <StackLayout VerticalOptions="CenterAndExpand" Padding="40">
-            <Label Text="Welcome to AuthorizationPage!"
+            <Label Text="Enter your security code"
-                VerticalOptions="CenterAndExpand" 
+                   FontSize="23"/>
-                HorizontalOptions="CenterAndExpand" />
+            <Entry IsPassword="True" Placeholder="Your hard code"/>
+            <Label x:Name="ErrorMessageLabel"
+                   TextColor="#d22"
+                   Margin="0,10" HorizontalOptions="Center"/>
+            <Button Text="Authorize" Command="{Binding AuthorizeCommand}"/>
         </StackLayout>
     </ContentPage.Content>
 </ContentPage>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Pages/AuthorizationPage.xaml.cs

@@ -3,7 +3,8 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
-
+using SafeMessageStorage.Services.AuthorizationService;
+using SafeMessageStorage.ViewModels;
 using Xamarin.Forms;
 using Xamarin.Forms.Xaml;
 
@@ -12,9 +13,40 @@ namespace SafeMessageStorage.Pages
     [XamlCompilation(XamlCompilationOptions.Compile)]
     public partial class AuthorizationPage : ContentPage
     {
-        public AuthorizationPage()
+        private AuthorizationPageViewModel _viewModel => this.BindingContext as AuthorizationPageViewModel;
+        private IAuthorizationService _authorizationService;
+        public AuthorizationPage(IAuthorizationService authorizationService)
         {
             InitializeComponent();
+            BindingContext = new AuthorizationPageViewModel(authorizationService);
+            _authorizationService = authorizationService;
+
+            _viewModel.AuthorizationFailed += _viewModel_AuthorizationFailed;
+            _viewModel.AuthorizationSucceeded += _viewModel_AuthorizationSucceeded;
+            _viewModel.PasswordSetRequested += ViewModelOnPasswordSetRequested;
+        }
+
+        private async void ViewModelOnPasswordSetRequested(object sender, EventArgs e)
+        {
+            await Navigation.PushModalAsync(new SetPasswordPage(_authorizationService));
+        }
+
+        protected override void OnAppearing()
+        {
+            _viewModel.Initialize();
+        }
+
+        private void _viewModel_AuthorizationSucceeded(object sender, EventArgs e)
+        {
+
+        }
+
+        private async void _viewModel_AuthorizationFailed(object sender, string e)
+        {
+            ErrorMessageLabel.Text = e; 
+            await ErrorMessageLabel.FadeTo(1);
+            await Task.Delay(1000);
+            await ErrorMessageLabel.FadeTo(0);
         }
     }
 }

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Pages/SetPasswordPage.xaml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             mc:Ignorable="d"
+             x:Class="SafeMessageStorage.Pages.SetPasswordPage"
+             Title="Set password">
+    <ContentPage.Content>
+        <StackLayout VerticalOptions="CenterAndExpand" Padding="40">
+            <Label Text="Set password"/>
+            <Entry IsPassword="True" Text="{Binding Password}"/>
+            <Label Text="Repeat"/>
+            <Entry IsPassword="True" Text="{Binding RepeatPassword}"/>
+            <Label x:Name="ErrorMessageLabel"
+                   TextColor="#d22"
+                   Margin="0,10" HorizontalOptions="Center"/>
+            <Button Text="Set password" Command="{Binding SetPasswordCommand}"/>
+        </StackLayout>
+    </ContentPage.Content>
+</ContentPage>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Pages/SetPasswordPage.xaml.cs

@@ -0,0 +1,41 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using SafeMessageStorage.Services.AuthorizationService;
+using SafeMessageStorage.ViewModels;
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace SafeMessageStorage.Pages
+{
+    [XamlCompilation(XamlCompilationOptions.Compile)]
+    public partial class SetPasswordPage : ContentPage
+    {
+        private SetPasswordPageViewModel _viewModel => this.BindingContext as SetPasswordPageViewModel;
+
+        public SetPasswordPage(IAuthorizationService authorizationService)
+        {
+            InitializeComponent();
+            BindingContext = new SetPasswordPageViewModel(authorizationService);
+
+            _viewModel.PasswordSetFailed += _viewModel_PasswordSetFailed;
+            _viewModel.PasswordSetSucceeded += _viewModel_PasswordSetSucceeded;
+
+        }
+
+        private void _viewModel_PasswordSetSucceeded(object sender, EventArgs e)
+        {
+            Navigation.PopModalAsync();
+        }
+
+        private async void _viewModel_PasswordSetFailed(object sender, string e)
+        {
+            ErrorMessageLabel.Text = e;
+            await ErrorMessageLabel.FadeTo(1);
+            await Task.Delay(1000);
+            await ErrorMessageLabel.FadeTo(0);
+        }
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage.csproj

@@ -6,14 +6,11 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Xamarin.Forms" Version="4.3.0.908675" />  
+    <PackageReference Include="Xamarin.Forms" Version="4.6.0.847" />  
     <PackageReference Include="Xamarin.Essentials" Version="1.3.1" />
   </ItemGroup>
 
   <ItemGroup>
-    <Folder Include="Models\" />
-    <Folder Include="Services\" />
-    <Folder Include="ViewModels\" />
     <Folder Include="Views\" />
   </ItemGroup>
 
@@ -21,5 +18,8 @@
     <EmbeddedResource Update="Pages\AuthorizationPage.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="Pages\SetPasswordPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
   </ItemGroup>
 </Project>

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Services/AuthorizationService/AuthorizationServiceMOCK.cs

@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SafeMessageStorage.Services.AuthorizationService
+{
+    public class AuthorizationServiceMOCK : IAuthorizationService
+    {
+        public bool IsAuthorized => false;
+        public bool IsPasswordSet => false;
+        public Task<bool> Authorize(string password)
+        {
+            return Task.FromResult(false);
+        }
+
+        public Task<bool> Deauthorize()
+        {
+            throw new NotImplementedException();
+        }
+
+        public Task<bool> ChangePassword(string currentPassword, string newPassword)
+        {
+            return Task.FromResult(true);
+        }
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Services/AuthorizationService/IAuthorizationService.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace SafeMessageStorage.Services.AuthorizationService
+{
+    public interface IAuthorizationService
+    {
+        bool IsAuthorized { get; }
+
+        bool IsPasswordSet { get; }
+
+        Task<bool> Authorize(string password);
+
+        Task<bool> Deauthorize();
+
+        Task<bool> ChangePassword(string currentPassword, string newPassword);
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/Services/MessageStorageService/IMessageStorageService.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using SafeMessageStorage.Models;
+
+namespace SafeMessageStorage.Services.MessageStorageService
+{
+    public interface IMessageStorageService
+    {
+        Task<bool> IsStorageEmpty { get; }
+
+        Task<bool> SaveMessage(Message message);
+
+        Task<Message> ReadMessage();
+
+        Task<bool> DeleteMessage();
+
+
+
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/ViewModels/AuthorizationPageViewModel.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+using SafeMessageStorage.Services.AuthorizationService;
+using Xamarin.Forms;
+
+namespace SafeMessageStorage.ViewModels
+{
+    public class AuthorizationPageViewModel : ViewModelBase
+    {
+        private readonly IAuthorizationService _authorizationService;
+
+        public AuthorizationPageViewModel(IAuthorizationService authorizationService)
+        {
+            _authorizationService = authorizationService;
+        }
+
+        public event EventHandler<string> AuthorizationFailed;
+        public event EventHandler AuthorizationSucceeded;
+        public event EventHandler PasswordSetRequested; 
+
+        private string _securityCode;
+        public string SecurityCode
+        {
+            get=>_securityCode;
+            set
+            {
+                _securityCode = value;
+                OnPropertyChanged();
+            }
+        }
+
+        public ICommand AuthorizeCommand => new Command(async () => await Authorize(SecurityCode));
+
+        public void Initialize()
+        {
+            if(!_authorizationService.IsPasswordSet)
+                PasswordSetRequested?.Invoke(this,EventArgs.Empty);
+        }
+
+        private async Task Authorize(string code)
+        {
+            if (await _authorizationService.Authorize(code))
+                AuthorizationSucceeded?.Invoke(this, EventArgs.Empty);
+            else
+            {
+                AuthorizationFailed?.Invoke(this, "Invalid code");
+                SecurityCode = string.Empty;
+            }
+        }
+    }
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/ViewModels/SetPasswordPageViewModel.cs

@@ -0,0 +1,51 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Windows.Input;
+using SafeMessageStorage.Services.AuthorizationService;
+using Xamarin.Forms;
+
+namespace SafeMessageStorage.ViewModels
+{
+    public class SetPasswordPageViewModel : ViewModelBase
+    {
+        private IAuthorizationService _authorizationService;
+
+        public SetPasswordPageViewModel(IAuthorizationService authorizationService)
+        {
+            _authorizationService = authorizationService;
+        }
+
+		private string _password;
+        public string Password
+		{
+			get { return _password; }
+			set { _password = value; OnPropertyChanged(); }
+		}
+
+		private string _repeatPassword;
+        public string RepeatPassword
+		{
+			get { return _repeatPassword; }
+			set { _repeatPassword = value; OnPropertyChanged(); }
+		}
+
+        public event EventHandler<string> PasswordSetFailed;
+        public event EventHandler PasswordSetSucceeded;
+
+        public ICommand SetPasswordCommand => new Command(()=>SetPassword(_password,_repeatPassword));
+
+        private async void SetPassword(string password, string repeatPassword)
+        {
+            if (!password.Equals(repeatPassword))
+            {
+                PasswordSetFailed?.Invoke(this,"Passwords are not equal");
+            }
+            else
+            {
+               if(await _authorizationService.ChangePassword(null, password)) 
+                   PasswordSetSucceeded?.Invoke(this,EventArgs.Empty);
+            }
+        }
+	}
+}

src/SafeMessageStorage/SafeMessageStorage/SafeMessageStorage/ViewModels/ViewModelBase.cs

@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Text;
+using SafeMessageStorage.Annotations;
+
+namespace SafeMessageStorage.ViewModels
+{
+    public abstract class ViewModelBase : INotifyPropertyChanged
+    {
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        [NotifyPropertyChangedInvocator]
+        protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+        {
+            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+        }
+    }
+}