NEST-536: Move Google Tag into HE so it's available regardless of theme

Lombiq.HelpfulExtensions/Extensions/GoogleTag/GoogleTagLiquidParserTag.cs

@@ -0,0 +1,50 @@
+using Fluid;
+using Fluid.Ast;
+using Fluid.Values;
+using Lombiq.HelpfulLibraries.OrchardCore.Liquid;
+using OrchardCore.DisplayManagement.Liquid.Tags;
+using System.Collections.Generic;
+using System.IO;
+using System.Text.Encodings.Web;
+using System.Threading.Tasks;
+
+namespace Lombiq.HelpfulExtensions.Extensions.GoogleTag;
+
+public class GoogleTagLiquidParserTag : ILiquidParserTag
+{
+    public async ValueTask<Completion> WriteToAsync(
+        IReadOnlyList<FilterArgument> argumentsList,
+        TextWriter writer,
+        TextEncoder encoder,
+        TemplateContext context)
+    {
+        var arguments = new List<FilterArgument>
+        {
+            new(null, new LiteralExpression(new StringValue(GoogleTagViewModel.ShapeType))),
+        };
+
+        foreach (var argument in argumentsList)
+        {
+            if (argument.Name == "property_id")
+            {
+                await AddStringAsync(arguments, nameof(GoogleTagViewModel.GoogleTagPropertyId), argument, context);
+            }
+            else if (argument.Name == "cookie_domain")
+            {
+                await AddStringAsync(arguments, nameof(GoogleTagViewModel.CookieDomain), argument, context);
+            }
+        }
+
+        return await ShapeTag.WriteToAsync(arguments, writer, encoder, context);
+    }
+
+    private static async Task AddStringAsync(
+        List<FilterArgument> arguments,
+        string newName,
+        FilterArgument argument,
+        TemplateContext context)
+    {
+        var newValue = await argument.Expression.EvaluateAsync(context);
+        arguments.Add(new(newName, new LiteralExpression(newValue)));
+    }
+}

Lombiq.HelpfulExtensions/Extensions/GoogleTag/GoogleTagTagHelper.cs

@@ -0,0 +1,26 @@
+using Lombiq.HelpfulLibraries.OrchardCore.TagHelpers;
+using Microsoft.AspNetCore.Razor.TagHelpers;
+using OrchardCore.DisplayManagement;
+using System.Threading.Tasks;
+
+namespace Lombiq.HelpfulExtensions.Extensions.GoogleTag;
+
+[HtmlTargetElement("google-tag")]
+public class GoogleTagTagHelper : ShapeTagHelperBase<GoogleTagViewModel>
+{
+    [HtmlAttributeName("property-id")]
+    public string PropertyId { get; set; }
+
+    [HtmlAttributeName("cookie-domain")]
+    public string CookieDomain { get; set; }
+
+    public GoogleTagTagHelper(IDisplayHelper displayHelper, IShapeFactory shapeFactory)
+        : base(displayHelper, shapeFactory)
+    {
+    }
+
+    protected override string ShapeType => GoogleTagViewModel.ShapeType;
+
+    protected override ValueTask<GoogleTagViewModel> GetViewModelAsync(TagHelperContext context, TagHelperOutput output) =>
+        ValueTask.FromResult(new GoogleTagViewModel(PropertyId, CookieDomain));
+}

Lombiq.HelpfulExtensions/Extensions/GoogleTag/GoogleTagViewModel.cs

@@ -0,0 +1,20 @@
+using OrchardCore.DisplayManagement.Views;
+
+namespace Lombiq.HelpfulExtensions.Extensions.GoogleTag;
+
+public class GoogleTagViewModel : ShapeViewModel
+{
+    public const string ShapeType = "GoogleTag";
+
+    public string GoogleTagPropertyId { get; set; }
+    public string CookieDomain { get; set; }
+
+    public GoogleTagViewModel() => Metadata.Type = ShapeType;
+
+    public GoogleTagViewModel(string googleTagPropertyId, string cookieDomain)
+        : this()
+    {
+        GoogleTagPropertyId = googleTagPropertyId;
+        CookieDomain = cookieDomain;
+    }
+}

Lombiq.HelpfulExtensions/Extensions/GoogleTag/Startup.cs

@@ -0,0 +1,14 @@
+using Microsoft.Extensions.DependencyInjection;
+using OrchardCore.Modules;
+
+namespace Lombiq.HelpfulExtensions.Extensions.GoogleTag;
+
+[Feature(FeatureIds.GoogleTag)]
+public class Startup : StartupBase
+{
+    public override void ConfigureServices(IServiceCollection services)
+    {
+        services.AddTagHelpers<GoogleTagTagHelper>();
+        services.AddLiquidParserTag<GoogleTagLiquidParserTag>("google_tag");
+    }
+}

Lombiq.HelpfulExtensions/FeatureIds.cs

@@ -19,4 +19,5 @@ public static class FeatureIds
     public const string Workflows = FeatureIdPrefix + nameof(Workflows);
     public const string Trumbowyg = FeatureIdPrefix + nameof(Trumbowyg);
     public const string ResetPasswordActivity = Workflows + "." + nameof(ResetPasswordActivity);
+    public const string GoogleTag = FeatureIdPrefix + nameof(GoogleTag);
 }

Lombiq.HelpfulExtensions/Lombiq.HelpfulExtensions.csproj

@@ -35,18 +35,18 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="OrchardCore.Autoroute" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.ContentFields" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Contents" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Flows" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Html" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Lists" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Liquid.Abstractions" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Markdown" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.MetaWeblog.Abstractions" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Module.Targets" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Rules.Abstractions" Version="2.0.0-preview-18312" />
-    <PackageReference Include="OrchardCore.Workflows" Version="2.0.0-preview-18312" />
+    <PackageReference Include="OrchardCore.Autoroute" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.ContentFields" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Contents" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Flows" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Html" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Lists" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Liquid" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Markdown" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.MetaWeblog.Abstractions" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Module.Targets" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Rules.Abstractions" Version="2.0.0-preview-18315" />
+    <PackageReference Include="OrchardCore.Workflows" Version="2.0.0-preview-18315" />
     <PackageReference Include="Scrutor" Version="4.2.2" />
   </ItemGroup>
 

Lombiq.HelpfulExtensions/Manifest.cs

@@ -146,3 +146,10 @@
     Category = "Content",
     Description = "Adds option for inserting code snippets in Trumbowyg editor."
 )]
+
+[assembly: Feature(
+    Id = GoogleTag,
+    Name = "Lombiq Helpful Extensions - Google Tag",
+    Category = "Content",
+    Description = "Adds a shape along with Razor and Liquid tag helpers for Google Analytics."
+)]

Lombiq.HelpfulExtensions/Views/GoogleTag.cshtml

@@ -0,0 +1,38 @@
+@model dynamic
+
+@using Lombiq.HelpfulLibraries.OrchardCore.Security
+@using Microsoft.AspNetCore.Http.Features;
+@using Microsoft.Extensions.Hosting;
+@using Lombiq.HelpfulExtensions.Extensions.GoogleTag
+
+@inject IHostEnvironment HostEnvironment
+
+@{
+    var trackingConsentFeature = ViewContext.HttpContext.Features.Get<ITrackingConsentFeature>();
+}
+
+@if (HostEnvironment.IsProduction() && trackingConsentFeature is not { CanTrack: false })
+{
+    GoogleAnalyticsContentSecurityPolicyProvider.EnableForCurrentRequest(Context);
+
+    var viewModel = Model as GoogleTagViewModel ?? new GoogleTagViewModel
+    {
+        GoogleTagPropertyId = Model.GoogleTagPropertyId,
+        CookieDomain = Model.CookieDomain,
+    };
+    var cookieDomain = string.Empty;
+
+    if (!string.IsNullOrEmpty(viewModel.CookieDomain))
+    {
+        cookieDomain = $", {{'cookie_domain': '{viewModel.CookieDomain}' }}";
+    }
+
+    <script async src="https://www.googletagmanager.com/gtag/js?id=@viewModel.GoogleTagPropertyId"></script>
+    <script>
+        window.dataLayer = window.dataLayer || [];
+        function gtag() { dataLayer.push(arguments); }
+        gtag('js', new Date());
+
+        gtag('config', '@viewModel.GoogleTagPropertyId'@Html.Raw(cookieDomain))
+    </script>
+}

Readme.md

@@ -222,6 +222,12 @@ builder.WhenContentTypeEditor("BlogPost").RegisterFootScript(Lombiq.HelpfulExten
 builder.WhenContentTypeEditor("BlogPost").RegisterStylesheet(Lombiq.HelpfulExtensions.Constants.ResourceNames.TrumbowygHighlight);
 ```
 
+### Google Tag
+
+Adds a shape along with Razor and Liquid tag helpers for Google Analytics, using <https://tagmanager.google.com/>.
+
+You can use the `<google-tag property-id="..." cookie-domain="auto">` Razor tag helper in _cshtml_ files or the `{% google_tag property_id: "...", cookie_domain: "auto" %}` parser tag in Liquid.
+
 ## Contributing and support
 
 Bug reports, feature requests, comments, questions, code contributions and love letters are warmly welcome. You can send them to us via GitHub issues and pull requests. Please adhere to our [open-source guidelines](https://lombiq.com/open-source-guidelines) while doing so.