Add File Seller plugin

BTCPayServerPlugins.sln

@@ -53,6 +53,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BTCPayServer.Plugins.Dynami
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BTCPayServer.Plugins.Prism", "Plugins\BTCPayServer.Plugins.Prism\BTCPayServer.Plugins.Prism.csproj", "{9BADDA0B-A5AB-4D51-9EBE-67C08C459DC7}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BTCPayServer.Plugins.FileSeller", "Plugins\BTCPayServer.Plugins.FileSeller\BTCPayServer.Plugins.FileSeller.csproj", "{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -253,6 +255,14 @@ Global
 		{9BADDA0B-A5AB-4D51-9EBE-67C08C459DC7}.Altcoins-Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9BADDA0B-A5AB-4D51-9EBE-67C08C459DC7}.Altcoins-Release|Any CPU.ActiveCfg = Debug|Any CPU
 		{9BADDA0B-A5AB-4D51-9EBE-67C08C459DC7}.Altcoins-Release|Any CPU.Build.0 = Debug|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Altcoins-Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Altcoins-Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Altcoins-Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F2D81B6A-E1EA-4900-BF9A-924D2CA951DD}.Altcoins-Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{B19C9F52-DC47-466D-8B5C-2D202B7B003F} = {9E04ECE9-E304-4FF2-9CBC-83256E6C6962}

BTCPayServerPlugins.sln.DotSettings.user

@@ -1,3 +1,4 @@
 <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/UnloadedProject/UnloadedProjects/=b4e2ed08_002D4ad3_002D4648_002D8bdb_002D3107200460b9_0023BTCPayServer_002EPlugins_002ELiquidPlus/@EntryIndexedValue">True</s:Boolean>
 	
 	<s:Boolean x:Key="/Default/UserDictionary/Words/=Nostr/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

Plugins/BTCPayServer.Plugins.FileSeller/BTCPayServer.Plugins.FileSeller.csproj

@@ -0,0 +1,46 @@
+<Project Sdk="Microsoft.NET.Sdk.Razor">
+
+    <PropertyGroup>
+        <TargetFramework>net6.0</TargetFramework>
+        <LangVersion>10</LangVersion>
+    </PropertyGroup>
+    <!-- -->
+    <!-- Plugin specific properties -->
+    <PropertyGroup>
+        <Product>File Seller</Product>
+        <Description>Allows you to sell files through the point of sale/crowdfund apps.</Description>
+        <Version>1.0.0</Version>
+    </PropertyGroup>
+    <!-- Plugin development properties -->
+    <PropertyGroup>
+        <AddRazorSupportForMvc>true</AddRazorSupportForMvc>
+        <PreserveCompilationContext>false</PreserveCompilationContext>
+        <GenerateEmbeddedFilesManifest>true</GenerateEmbeddedFilesManifest>
+    </PropertyGroup>
+
+    <!-- This will make sure that referencing BTCPayServer doesn't put any artifact in the published directory -->
+    <ItemDefinitionGroup>
+        <ProjectReference>
+            <Properties>StaticWebAssetsEnabled=false</Properties>
+            <Private>false</Private>
+            <ExcludeAssets>runtime;native;build;buildTransitive;contentFiles</ExcludeAssets>
+        </ProjectReference>
+    </ItemDefinitionGroup>
+
+
+    <ItemGroup>
+        <EmbeddedResource Include="Resources\**" />
+        <ProjectReference Include="..\..\submodules\btcpayserver\BTCPayServer\BTCPayServer.csproj" />
+    </ItemGroup>
+
+
+    <ItemGroup>
+      <Folder Include="Resources\js\" />
+      <Folder Include="Views\" />
+    </ItemGroup>
+
+
+    <ItemGroup>
+      <AdditionalFiles Include="Views\Shared\FileSeller\Detect.cshtml" />
+    </ItemGroup>
+</Project>

Plugins/BTCPayServer.Plugins.FileSeller/FileSellerPlugin.cs

@@ -0,0 +1,27 @@
+using BTCPayServer.Abstractions.Contracts;
+using BTCPayServer.Abstractions.Models;
+using BTCPayServer.Abstractions.Services;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace BTCPayServer.Plugins.FileSeller;
+
+public class FileSellerPlugin : BaseBTCPayServerPlugin
+{
+    public override IBTCPayServerPlugin.PluginDependency[] Dependencies { get; } =
+    {
+        new() { Identifier = nameof(BTCPayServer), Condition = ">=1.10.3" }
+    };
+    public override void Execute(IServiceCollection applicationBuilder)
+    {
+        applicationBuilder.AddHostedService<FileSellerService>();
+        applicationBuilder.AddSingleton<IUIExtension>(new UIExtension("FileSeller/Detect",
+            "header-nav"));
+        applicationBuilder.AddSingleton<IUIExtension>(new UIExtension("FileSeller/Detect",
+            "checkout-end"));
+        applicationBuilder.AddSingleton<IUIExtension>(new UIExtension("FileSeller/FileSellerTemplateEditorItemDetail",
+            "app-template-editor-item-detail"));
+        
+
+        base.Execute(applicationBuilder);
+    }
+}

Plugins/BTCPayServer.Plugins.FileSeller/FileSellerService.cs

@@ -0,0 +1,144 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Events;
+using BTCPayServer.HostedServices;
+using BTCPayServer.Plugins.Crowdfund;
+using BTCPayServer.Plugins.PointOfSale;
+using BTCPayServer.Services.Apps;
+using BTCPayServer.Services.Invoices;
+using BTCPayServer.Storage.Services;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Plugins.FileSeller
+{
+    public class FileSellerService:EventHostedServiceBase
+    {
+        private readonly AppService _appService;
+        private readonly FileService _fileService;
+        private readonly InvoiceRepository _invoiceRepository;
+        private readonly StoredFileRepository _storedFileRepository;
+
+        public FileSellerService(EventAggregator eventAggregator, 
+            ILogger<FileSellerService> logger, 
+            AppService appService, 
+            FileService fileService,
+            InvoiceRepository invoiceRepository,
+            StoredFileRepository storedFileRepository) : base(eventAggregator, logger)
+        {
+            _appService = appService;
+            _fileService = fileService;
+            _invoiceRepository = invoiceRepository;
+            _storedFileRepository = storedFileRepository;
+        }
+
+        public static Uri UrlToUse { get; set; }
+
+        protected override void SubscribeToEvents()
+        {
+            Subscribe<InvoiceEvent>();
+            base.SubscribeToEvents();
+        }
+
+        protected override async Task ProcessEvent(object evt, CancellationToken cancellationToken)
+        {
+            if (evt is not InvoiceEvent invoiceEvent) return;
+            Dictionary<string, int> cartItems = null;
+            if (invoiceEvent.Name is not (InvoiceEvent.Completed or InvoiceEvent.MarkedCompleted or InvoiceEvent.Confirmed  ))
+            {
+                return;
+            }
+            var appIds = AppService.GetAppInternalTags(invoiceEvent.Invoice);
+
+            if (!appIds.Any())
+            {
+                return;
+            }
+            if(invoiceEvent.Invoice.Metadata.AdditionalData.TryGetValue("fileselleractivated", out var activated))
+            {
+                return;
+            }
+            if ((!string.IsNullOrEmpty(invoiceEvent.Invoice.Metadata.ItemCode) ||
+                 AppService.TryParsePosCartItems(invoiceEvent.Invoice.Metadata.PosData, out cartItems)))
+            {
+                var items = cartItems ?? new Dictionary<string, int>();
+                if (!string.IsNullOrEmpty(invoiceEvent.Invoice.Metadata.ItemCode))
+                {
+                    items.TryAdd(invoiceEvent.Invoice.Metadata.ItemCode, 1);
+                }
+
+                    var apps = (await _appService.GetApps(appIds)).Select(data =>
+                    {
+                        switch (data.AppType)
+                        {
+                            case PointOfSaleAppType.AppType:
+                                var possettings = data.GetSettings<PointOfSaleSettings>();
+                                return (Data: data, Settings: (object) possettings,
+                                    Items: AppService.Parse(possettings.Template));
+                            case CrowdfundAppType.AppType:
+                                var cfsettings = data.GetSettings<CrowdfundSettings>();
+                                return (Data: data, Settings: cfsettings,
+                                    Items: AppService.Parse(cfsettings.PerksTemplate));
+                            default:
+                                return (null, null, null);
+                        }
+                    }).Where(tuple => tuple.Data != null && tuple.Items.Any(item =>
+                        item.AdditionalData?.ContainsKey("file") is true &&
+                        items.ContainsKey(item.Id)));
+
+                    var fileIds = new HashSet<string>();
+                    
+                    foreach (var valueTuple in apps)
+                    {
+                        foreach (var item1 in valueTuple.Items.Where(item =>
+                                     item.AdditionalData?.ContainsKey("file") is true && 
+                                     items.ContainsKey(item.Id)))
+                        {
+                            var fileId = item1.AdditionalData["file"].Value<string>();
+                            fileIds.Add(fileId);
+                            
+                        }
+                    }
+
+                    var loadedFiles = await _storedFileRepository.GetFiles(new StoredFileRepository.FilesQuery()
+                    {
+                        Id = fileIds.ToArray()
+                    });
+                    var productLinkTasks =  loadedFiles.ToDictionary(file =>file,file => _fileService.GetTemporaryFileUrl(UrlToUse, file.Id, DateTimeOffset.MaxValue, true));
+
+                    var res = await Task.WhenAll(productLinkTasks.Values);
+
+                    
+                    if (res.Any(s => !string.IsNullOrEmpty(s)))
+                    {
+                        var productTitleToFile =  productLinkTasks.Select(pair => (pair.Key.FileName, pair.Value.Result))
+                            .Where(s => s.Result is not null)
+                            .ToDictionary(tuple => tuple.FileName, tuple => tuple.Result);
+                        
+                        var receiptData = new JObject();
+                        receiptData.Add("Downloadable Content", JObject.FromObject(productTitleToFile) );
+                        
+                        if (invoiceEvent.Invoice.Metadata.AdditionalData?.TryGetValue("receiptData",
+                                out var existingReceiptData) is true && existingReceiptData is JObject existingReceiptDataObj  )
+                        {
+                            receiptData.Merge(existingReceiptDataObj);
+                            
+                        }
+                        
+                        invoiceEvent.Invoice.Metadata.SetAdditionalData("receiptData", receiptData);
+                        
+                    }
+                    invoiceEvent.Invoice.Metadata.SetAdditionalData("fileselleractivated", "true");
+                    await _invoiceRepository.UpdateInvoiceMetadata(invoiceEvent.InvoiceId, invoiceEvent.Invoice.StoreId,
+                        invoiceEvent.Invoice.Metadata.ToJObject());
+
+                
+
+            }
+            await base.ProcessEvent(evt, cancellationToken);
+        }
+    }
+}

Plugins/BTCPayServer.Plugins.FileSeller/README.md

@@ -0,0 +1,17 @@
+# File Seller Plugin
+
+This plugin allows you to sell files on your BTCPay Server.
+
+## Installation
+
+1. Go to the "Plugins" page of your BTCPay Server
+2. Click on install under the "File Seller" plugin listing
+3. Restart BTCPay Server
+4. Go to Server Settings => Files
+5. Ensure that there is a file storage provider configured
+6. Click on "Add File"
+7. Go to your point of sale or crowdfund app settings
+8. Click on "Edit" on the item/perk you'd like to provide a file upon purchase.
+9. Select the file you'd like to provide from the new dropdown list titled "File"
+10. Close the editor and save the app
+11. Upon purchase (invoice marked as settled), a new section will appear on the invoice receipt with a link for each file unlocked.

Plugins/BTCPayServer.Plugins.FileSeller/Views/Shared/FileSeller/Detect.cshtml

@@ -0,0 +1,6 @@
+@using BTCPayServer.Abstractions.Extensions
+@using BTCPayServer.Plugins.FileSeller
+@{
+
+    FileSellerService.UrlToUse = Context.Request.GetAbsoluteRootUri();
+}

Plugins/BTCPayServer.Plugins.FileSeller/Views/Shared/FileSeller/FileSellerTemplateEditorItemDetail.cshtml

@@ -0,0 +1,19 @@
+@using BTCPayServer.Storage.Services
+@using BTCPayServer.Services
+@using Microsoft.AspNetCore.Identity
+@using BTCPayServer.Data
+@inject StoredFileRepository StoredFileRepository
+@inject UserManager<ApplicationUser> UserManager
+@inject UserService UserService
+@{
+    var userId = UserManager.GetUserId(User);
+    var files = (await StoredFileRepository.GetFiles(new StoredFileRepository.FilesQuery()
+    {
+        UserIds = await UserService.IsAdminUser(userId) ? Array.Empty<string>() : new[] {userId},
+    })).Select(file => new SelectListItem(file.FileName, file.Id)).Prepend(new SelectListItem("No file", ""));
+}
+<div class="form-group">
+    <label class="form-label">Downloadable file</label>
+    <select :value="editingItem['file'] || ''"  asp-items="files" class="form-select w-auto" v-on:change=" if(event.target.value) editingItem['file']= event.target.value; else delete editingItem['file'];"></select>
+    <span class="form-text">If a file is selected, when a user buys this item, a download link is generated in the payment receipt once the invoice is settled. <a target="_blank" asp-action="Files" asp-controller="UIServer">Upload files here</a></span>
+</div>

Plugins/BTCPayServer.Plugins.FileSeller/_ViewImports.cshtml

@@ -0,0 +1,5 @@
+@using BTCPayServer.Abstractions.Services
+@inject Safe Safe
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
+@addTagHelper *, BTCPayServer
+@addTagHelper *, BTCPayServer.Abstractions