From e25f9f4aaee4b80dd69eec03435426f391ad8acb Mon Sep 17 00:00:00 2001
From: BONNEVILLE Geoffroy <gbonneville@mega.com>
Date: Thu, 7 Dec 2017 18:49:03 +0100
Subject: [PATCH] Create a LicenseService to handle in-app purchases

---
 ModernKeePass/Data/WindowsStoreProxy.xml      | 57 +++++++++++
 ModernKeePass/Interfaces/ILicenseService.cs   | 10 ++
 ModernKeePass/ModernKeePassApp.csproj         |  5 +
 .../Pages/MainPageFrames/DonatePage.xaml      |  5 +-
 ModernKeePass/Services/LicenseService.cs      | 97 +++++++++++++++++++
 ModernKeePass/Strings/en-US/Resources.resw    |  3 +
 ModernKeePass/Strings/fr-FR/Resources.resw    |  3 +
 7 files changed, 179 insertions(+), 1 deletion(-)
 create mode 100644 ModernKeePass/Data/WindowsStoreProxy.xml
 create mode 100644 ModernKeePass/Interfaces/ILicenseService.cs
 create mode 100644 ModernKeePass/Services/LicenseService.cs

diff --git a/ModernKeePass/Data/WindowsStoreProxy.xml b/ModernKeePass/Data/WindowsStoreProxy.xml
new file mode 100644
index 0000000..57b2fde
--- /dev/null
+++ b/ModernKeePass/Data/WindowsStoreProxy.xml
@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<CurrentApp>
+  <ListingInformation>
+    <App>
+      <AppId>0719A91A-C322-4EE0-A257-E60733EECF06</AppId>
+      <LinkUri>https://www.microsoft.com/store/apps/9mwq48zk8nhv</LinkUri>
+      <CurrentMarket>en-us</CurrentMarket>
+      <AgeRating>3</AgeRating>
+      <MarketData xml:lang="en-us">
+        <Name>App with several in-app products</Name>
+        <Description>Sample app for demonstrating an expiring in-app product and a consumable in-app product</Description>
+        <Price>5.99</Price>
+        <CurrencySymbol>$</CurrencySymbol>
+      </MarketData>
+    </App>
+    <Product ProductId="donate1" LicenseDuration="0" ProductType="Consumable">
+      <MarketData xml:lang="en-us">
+        <Name>Small Donation</Name>
+        <Price>0.99</Price>
+        <CurrencySymbol>$</CurrencySymbol>
+      </MarketData>
+    </Product>
+    <Product ProductId="donate5" LicenseDuration="0" ProductType="Consumable">
+      <MarketData xml:lang="en-us">
+        <Name>Medium Donation</Name>
+        <Price>4.99</Price>
+        <CurrencySymbol>$</CurrencySymbol>
+      </MarketData>
+    </Product>
+    <Product ProductId="donate10" LicenseDuration="0" ProductType="Consumable">
+      <MarketData xml:lang="en-us">
+        <Name>Large Donation</Name>
+        <Price>9.99</Price>
+        <CurrencySymbol>$</CurrencySymbol>
+      </MarketData>
+    </Product>
+    <Product ProductId="donate20" LicenseDuration="0" ProductType="Consumable">
+      <MarketData xml:lang="en-us">
+        <Name>Generous Donation</Name>
+        <Price>19.99</Price>
+        <CurrencySymbol>$</CurrencySymbol>
+      </MarketData>
+    </Product>
+  </ListingInformation>
+  <LicenseInformation>
+    <App>
+      <IsActive>true</IsActive>
+      <IsTrial>false</IsTrial>
+    </App>
+  </LicenseInformation>
+  <ConsumableInformation>
+    <Product ProductId="donate1" TransactionId="00000001-0000-0000-0000-000000000000" Status="Active"/>
+    <Product ProductId="donate5" TransactionId="00000001-0000-0000-0000-000000000000" Status="Active"/>
+    <Product ProductId="donate10" TransactionId="00000001-0000-0000-0000-000000000000" Status="Active"/>
+    <Product ProductId="donate20" TransactionId="00000001-0000-0000-0000-000000000000" Status="Active"/>
+  </ConsumableInformation>
+</CurrentApp>
\ No newline at end of file
diff --git a/ModernKeePass/Interfaces/ILicenseService.cs b/ModernKeePass/Interfaces/ILicenseService.cs
new file mode 100644
index 0000000..94e4895
--- /dev/null
+++ b/ModernKeePass/Interfaces/ILicenseService.cs
@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Windows.ApplicationModel.Store;
+
+namespace ModernKeePass.Interfaces
+{
+    public interface ILicenseService
+    {
+        IReadOnlyDictionary<string, ProductListing> Products { get; }
+    }
+}
diff --git a/ModernKeePass/ModernKeePassApp.csproj b/ModernKeePass/ModernKeePassApp.csproj
index 1347c09..0ec278b 100644
--- a/ModernKeePass/ModernKeePassApp.csproj
+++ b/ModernKeePass/ModernKeePassApp.csproj
@@ -113,6 +113,7 @@
     <Compile Include="App.xaml.cs">
       <DependentUpon>App.xaml</DependentUpon>
     </Compile>
+    <Compile Include="Interfaces\ILicenseService.cs" />
     <Compile Include="Interfaces\IRecent.cs" />
     <Compile Include="Interfaces\IRecentItem.cs" />
     <Compile Include="Interfaces\IResource.cs" />
@@ -127,6 +128,7 @@
     <Compile Include="Common\ObservableDictionary.cs" />
     <Compile Include="Common\RelayCommand.cs" />
     <Compile Include="Common\SuspensionManager.cs" />
+    <Compile Include="Services\LicenseService.cs" />
     <Compile Include="Services\RecentService.cs" />
     <Compile Include="Services\ResourcesService.cs" />
     <Compile Include="Services\SettingsService.cs" />
@@ -410,6 +412,9 @@
     <Content Include="Assets\Wide310x150Logo.scale-140.png" />
     <Content Include="Assets\Wide310x150Logo.scale-180.png" />
     <Content Include="Assets\Wide310x150Logo.scale-80.png" />
+    <Content Include="Data\WindowsStoreProxy.xml">
+      <SubType>Designer</SubType>
+    </Content>
   </ItemGroup>
   <PropertyGroup Condition=" '$(VisualStudioVersion)' == '' or '$(VisualStudioVersion)' &lt; '12.0' ">
     <VisualStudioVersion>12.0</VisualStudioVersion>
diff --git a/ModernKeePass/Pages/MainPageFrames/DonatePage.xaml b/ModernKeePass/Pages/MainPageFrames/DonatePage.xaml
index 12d92c5..1c7d09e 100644
--- a/ModernKeePass/Pages/MainPageFrames/DonatePage.xaml
+++ b/ModernKeePass/Pages/MainPageFrames/DonatePage.xaml
@@ -8,7 +8,10 @@
 
     <StackPanel Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
         <TextBlock x:Uid="DonateDesc" />
-        <RadioButton GroupName="DonateOptions"  />
+        <RadioButton GroupName="DonateOptions" Content="1"  />
+        <RadioButton GroupName="DonateOptions" Content="5"  />
+        <RadioButton GroupName="DonateOptions" Content="10"  />
+        <RadioButton GroupName="DonateOptions" Content="20"  />
         <Button x:Uid="DonateButton" />
     </StackPanel>
 </Page>
diff --git a/ModernKeePass/Services/LicenseService.cs b/ModernKeePass/Services/LicenseService.cs
new file mode 100644
index 0000000..d563762
--- /dev/null
+++ b/ModernKeePass/Services/LicenseService.cs
@@ -0,0 +1,97 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using Windows.ApplicationModel;
+using Windows.ApplicationModel.Store;
+using ModernKeePass.Interfaces;
+
+namespace ModernKeePass.Services
+{
+    public class LicenseService : ILicenseService
+    {
+        public enum PurchaseResult
+        {
+            Succeeded,
+            NothingToFulfill,
+            PurchasePending,
+            PurchaseReverted,
+            ServerError,
+            NotPurchased,
+            AlreadyPurchased
+        }
+
+        public IReadOnlyDictionary<string, ProductListing> Products { get; }
+
+        //private LicenseInformation _licenseInformation;
+        private readonly HashSet<Guid> _consumedTransactionIds = new HashSet<Guid>();
+
+        public LicenseService()
+        {
+            // Initialize the license info for use in the app that is uploaded to the Store.
+            // Uncomment the following line in the release version of your app.
+            //_licenseInformation = CurrentApp.LicenseInformation;
+
+            // Initialize the license info for testing.
+            // Comment the following line in the release version of your app.
+            //_licenseInformation = CurrentAppSimulator.LicenseInformation;
+#if DEBUG
+            var proxyFile = Package.Current.InstalledLocation.GetFileAsync("data\\WindowsStoreProxy.xml").GetAwaiter().GetResult();
+            CurrentAppSimulator.ReloadSimulatorAsync(proxyFile).GetAwaiter().GetResult();
+            var listing = CurrentAppSimulator.LoadListingInformationAsync().GetAwaiter().GetResult();
+#else
+            var listing = CurrentApp.LoadListingInformationAsync().GetAwaiter().GetResult();
+#endif
+            Products = listing.ProductListings;
+        }
+
+        public async Task<PurchaseResult> Purchase(string addOn)
+        {
+#if DEBUG
+            var purchaseResults = await CurrentAppSimulator.RequestProductPurchaseAsync(addOn);
+#else
+            var purchaseResults = await CurrentApp.RequestProductPurchaseAsync(addOn);
+#endif
+            switch (purchaseResults.Status)
+            {
+                case ProductPurchaseStatus.Succeeded:
+                    GrantFeatureLocally(purchaseResults.TransactionId);
+                    return await ReportFulfillmentAsync(purchaseResults.TransactionId, addOn);
+                case ProductPurchaseStatus.NotFulfilled:
+                    // The purchase failed because we haven't confirmed fulfillment of a previous purchase.
+                    // Fulfill it now.
+                    if (!IsLocallyFulfilled(purchaseResults.TransactionId))
+                    {
+                        GrantFeatureLocally(purchaseResults.TransactionId);
+                    }
+                    return await ReportFulfillmentAsync(purchaseResults.TransactionId, addOn);
+                case ProductPurchaseStatus.NotPurchased:
+                    return PurchaseResult.NotPurchased;
+                case ProductPurchaseStatus.AlreadyPurchased:
+                    return PurchaseResult.AlreadyPurchased;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+
+        private async Task<PurchaseResult> ReportFulfillmentAsync(Guid transactionId, string productName)
+        {
+            FulfillmentResult result;
+#if DEBUG
+            result = await CurrentAppSimulator.ReportConsumableFulfillmentAsync(productName, transactionId);
+#else
+            result = await CurrentApp.ReportConsumableFulfillmentAsync(productName, transactionId);
+#endif
+            return (PurchaseResult) result;
+        }
+
+        private void GrantFeatureLocally(Guid transactionId)
+        {
+            _consumedTransactionIds.Add(transactionId);
+        }
+
+        private bool IsLocallyFulfilled(Guid transactionId)
+        {
+            return _consumedTransactionIds.Contains(transactionId);
+        }
+    }
+}
diff --git a/ModernKeePass/Strings/en-US/Resources.resw b/ModernKeePass/Strings/en-US/Resources.resw
index 862ef53..c8d0411 100644
--- a/ModernKeePass/Strings/en-US/Resources.resw
+++ b/ModernKeePass/Strings/en-US/Resources.resw
@@ -168,6 +168,9 @@
   <data name="CompositeKeyPassword.PlaceholderText" xml:space="preserve">
     <value>Password</value>
   </data>
+  <data name="DonateButton.Content" xml:space="preserve">
+    <value>Donate</value>
+  </data>
   <data name="DonateDesc.Text" xml:space="preserve">
     <value>Like this app? Why not make a small donation to support my work and help this app stay ad-free :) ?</value>
   </data>
diff --git a/ModernKeePass/Strings/fr-FR/Resources.resw b/ModernKeePass/Strings/fr-FR/Resources.resw
index 09fd9ff..51721be 100644
--- a/ModernKeePass/Strings/fr-FR/Resources.resw
+++ b/ModernKeePass/Strings/fr-FR/Resources.resw
@@ -168,6 +168,9 @@
   <data name="CompositeKeyPassword.PlaceholderText" xml:space="preserve">
     <value>Mot de passe</value>
   </data>
+  <data name="DonateButton.Content" xml:space="preserve">
+    <value>Donner</value>
+  </data>
   <data name="DonateDesc.Text" xml:space="preserve">
     <value>Vous aimez cette app? Pourquoi ne pas faire un petit don afin de m'encourager et d'éviter le recours aux publicités :) ?</value>
   </data>