PlotDirector/PlotLine/Services/PublicSeo.cs

using System.Text.Json;
using System.Text.Json.Serialization;

namespace PlotLine.Services;

public static class PublicRouteNames
{
    public const string Home = "PublicHome";
    public const string Pricing = "PublicPricing";
    public const string Help = "PublicHelp";
    public const string HelpCategory = "PublicHelpCategory";
    public const string HelpArticle = "PublicHelpArticle";
    public const string About = "PublicAbout";
    public const string Contact = "PublicContact";
    public const string Privacy = "PublicPrivacy";
    public const string Terms = "PublicTerms";
}

public static class PublicSeo
{
    public const string DefaultBaseUrl = "https://plotdirector.com";

    public static string BaseUrl(IConfiguration configuration)
    {
        var baseUrl = configuration["Site:PublicBaseUrl"]?.TrimEnd('/');
        return string.IsNullOrWhiteSpace(baseUrl) ? DefaultBaseUrl : baseUrl;
    }

    public static string AbsoluteUrl(IConfiguration configuration, string path) =>
        $"{BaseUrl(configuration)}{path}";

    public static string JsonLd(object value) =>
        JsonSerializer.Serialize(value, new JsonSerializerOptions
        {
            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull
        });

    public static string WebPageJsonLd(
        IConfiguration configuration,
        string schemaType,
        string name,
        string path,
        string? description = null) =>
        JsonLd(new Dictionary<string, object?>
        {
            ["@context"] = "https://schema.org",
            ["@type"] = schemaType,
            ["name"] = name,
            ["url"] = AbsoluteUrl(configuration, path),
            ["description"] = description
        });

    public static string BreadcrumbJsonLd(params (string Name, string Url)[] items) =>
        JsonLd(new Dictionary<string, object?>
        {
            ["@context"] = "https://schema.org",
            ["@type"] = "BreadcrumbList",
            ["itemListElement"] = items.Select((item, index) => new Dictionary<string, object?>
            {
                ["@type"] = "ListItem",
                ["position"] = index + 1,
                ["name"] = item.Name,
                ["item"] = item.Url
            })
        });
}