feat: added factory for standard webhooks, especially useful for di s…

…cenarios

src/StandardWebhooks/IStandardWebhookFactory.cs

@@ -0,0 +1,20 @@
+// Copyright (c) 2024, Codefactors Ltd.
+//
+// Codefactors Ltd licenses this file to you under the following license(s):
+//
+//   * The MIT License, see https://opensource.org/license/mit/
+
+namespace StandardWebhooks;
+
+/// <summary>
+/// Interface for factories that can create <see cref="StandardWebhook"/> instances.
+/// </summary>
+/// <remarks>Intended particularly for use in ASP.NET dependency injection scenarios.</remarks>
+public interface IStandardWebhookFactory
+{
+    /// <summary>
+    /// Creates a new instance of a <see cref="StandardWebhook"/>.
+    /// </summary>
+    /// <returns>New instance of a <see cref="StandardWebhook"/>.</returns>
+    StandardWebhook CreateWebhook();
+}

src/StandardWebhooks/StandardWebhookFactory.cs

@@ -0,0 +1,40 @@
+// Copyright (c) 2024, Codefactors Ltd.
+//
+// Codefactors Ltd licenses this file to you under the following license(s):
+//
+//   * The MIT License, see https://opensource.org/license/mit/
+
+namespace StandardWebhooks;
+
+/// <summary>
+/// Factory for creating <see cref="StandardWebhook"/> instances using the supplied
+/// factory constructor parameters.
+/// </summary>
+/// <remarks>Intended particularly for use in ASP.NET dependency injection scenarios.</remarks>
+public class StandardWebhookFactory : IStandardWebhookFactory
+{
+    private readonly string _signingKey;
+    private readonly WebhookConfigurationOptions? _webhookConfigurationOptions;
+
+    /// <summary>
+    /// Initializes a new instance of the <see cref="StandardWebhookFactory"/> class.
+    /// </summary>
+    /// <param name="signingKey">Signing key, as byte array.</param>
+    /// <param name="webhookConfigurationOptions">Options to set custom header keys.</param>
+    public StandardWebhookFactory(
+        string signingKey,
+        WebhookConfigurationOptions? webhookConfigurationOptions)
+    {
+        _signingKey = signingKey;
+        _webhookConfigurationOptions = webhookConfigurationOptions;
+    }
+
+    /// <summary>
+    /// Creates a new instance of a <see cref="StandardWebhook"/>.
+    /// </summary>
+    /// <returns>New instance of a <see cref="StandardWebhook"/>.</returns>
+    public StandardWebhook CreateWebhook() =>
+        _webhookConfigurationOptions != null ?
+        new StandardWebhook(_signingKey, _webhookConfigurationOptions) :
+        new StandardWebhook(_signingKey);
+}