Add Datadog integration (#6289)

* Event integration updates and cleanups

* Add Datadog integration

* Update README to include link to Datadog PR

* Move doc update into the Datadog PR; Fix empty message on ArgumentException

* Adjust exception message

Co-authored-by: Matt Bishop <mbishop@bitwarden.com>

* Removed unnecessary nullable enable; Moved Docs link to PR into this PR

* Remove unnecessary nullable enable calls

---------

Co-authored-by: Matt Bishop <mbishop@bitwarden.com>

src/Core/AdminConsole/Enums/IntegrationType.cs

@@ -6,7 +6,8 @@ public enum IntegrationType : int
     Scim = 2,
     Slack = 3,
     Webhook = 4,
-    Hec = 5
+    Hec = 5,
+    Datadog = 6
 }
 
 public static class IntegrationTypeExtensions
@@ -21,6 +22,8 @@ public static class IntegrationTypeExtensions
                 return "webhook";
             case IntegrationType.Hec:
                 return "hec";
+            case IntegrationType.Datadog:
+                return "datadog";
             default:
                 throw new ArgumentOutOfRangeException(nameof(type), $"Unsupported integration type: {type}");
         }

src/Core/AdminConsole/Models/Data/EventIntegrations/DatadogIntegration.cs

@@ -0,0 +1,3 @@
+namespace Bit.Core.AdminConsole.Models.Data.EventIntegrations;
+
+public record DatadogIntegration(string ApiKey, Uri Uri);

src/Core/AdminConsole/Models/Data/EventIntegrations/DatadogIntegrationConfigurationDetails.cs

@@ -0,0 +1,3 @@
+namespace Bit.Core.AdminConsole.Models.Data.EventIntegrations;
+
+public record DatadogIntegrationConfigurationDetails(string ApiKey, Uri Uri);

src/Core/AdminConsole/Models/Data/EventIntegrations/DatadogListenerConfiguration.cs

@@ -0,0 +1,38 @@
+using Bit.Core.Enums;
+using Bit.Core.Settings;
+
+namespace Bit.Core.AdminConsole.Models.Data.EventIntegrations;
+
+public class DatadogListenerConfiguration(GlobalSettings globalSettings)
+    : ListenerConfiguration(globalSettings), IIntegrationListenerConfiguration
+{
+    public IntegrationType IntegrationType
+    {
+        get => IntegrationType.Datadog;
+    }
+
+    public string EventQueueName
+    {
+        get => _globalSettings.EventLogging.RabbitMq.DatadogEventsQueueName;
+    }
+
+    public string IntegrationQueueName
+    {
+        get => _globalSettings.EventLogging.RabbitMq.DatadogIntegrationQueueName;
+    }
+
+    public string IntegrationRetryQueueName
+    {
+        get => _globalSettings.EventLogging.RabbitMq.DatadogIntegrationRetryQueueName;
+    }
+
+    public string EventSubscriptionName
+    {
+        get => _globalSettings.EventLogging.AzureServiceBus.DatadogEventSubscriptionName;
+    }
+
+    public string IntegrationSubscriptionName
+    {
+        get => _globalSettings.EventLogging.AzureServiceBus.DatadogIntegrationSubscriptionName;
+    }
+}

src/Core/AdminConsole/Services/Implementations/EventIntegrations/DatadogIntegrationHandler.cs

@@ -0,0 +1,25 @@
+using System.Text;
+using Bit.Core.AdminConsole.Models.Data.EventIntegrations;
+
+namespace Bit.Core.Services;
+
+public class DatadogIntegrationHandler(
+    IHttpClientFactory httpClientFactory,
+    TimeProvider timeProvider)
+    : IntegrationHandlerBase<DatadogIntegrationConfigurationDetails>
+{
+    private readonly HttpClient _httpClient = httpClientFactory.CreateClient(HttpClientName);
+
+    public const string HttpClientName = "DatadogIntegrationHandlerHttpClient";
+
+    public override async Task<IntegrationHandlerResult> HandleAsync(IntegrationMessage<DatadogIntegrationConfigurationDetails> message)
+    {
+        var request = new HttpRequestMessage(HttpMethod.Post, message.Configuration.Uri);
+        request.Content = new StringContent(message.RenderedTemplate, Encoding.UTF8, "application/json");
+        request.Headers.Add("DD-API-KEY", message.Configuration.ApiKey);
+
+        var response = await _httpClient.SendAsync(request);
+
+        return ResultFromHttpResponse(response, message, timeProvider);
+    }
+}

src/Core/AdminConsole/Services/Implementations/EventIntegrations/README.md

@@ -323,7 +323,8 @@ A hosted service (`IntegrationConfigurationDetailsCacheService`) runs in the bac
 # Building a new integration
 
 These are all the pieces required in the process of building out a new integration. For
-clarity in naming, these assume a new integration called "Example".
+clarity in naming, these assume a new integration called "Example". To see a complete example
+in context, view [the PR for adding the Datadog integration](https://github.com/bitwarden/server/pull/6289).
 
 ## IntegrationType
 

src/Core/Settings/GlobalSettings.cs

@@ -304,6 +304,8 @@ public class GlobalSettings : IGlobalSettings
             public virtual string WebhookIntegrationSubscriptionName { get; set; } = "integration-webhook-subscription";
             public virtual string HecEventSubscriptionName { get; set; } = "events-hec-subscription";
             public virtual string HecIntegrationSubscriptionName { get; set; } = "integration-hec-subscription";
+            public virtual string DatadogEventSubscriptionName { get; set; } = "events-datadog-subscription";
+            public virtual string DatadogIntegrationSubscriptionName { get; set; } = "integration-datadog-subscription";
 
             public string ConnectionString
             {
@@ -345,6 +347,9 @@ public class GlobalSettings : IGlobalSettings
             public virtual string HecEventsQueueName { get; set; } = "events-hec-queue";
             public virtual string HecIntegrationQueueName { get; set; } = "integration-hec-queue";
             public virtual string HecIntegrationRetryQueueName { get; set; } = "integration-hec-retry-queue";
+            public virtual string DatadogEventsQueueName { get; set; } = "events-datadog-queue";
+            public virtual string DatadogIntegrationQueueName { get; set; } = "integration-datadog-queue";
+            public virtual string DatadogIntegrationRetryQueueName { get; set; } = "integration-datadog-retry-queue";
 
             public string HostName
             {