Implemented support for authentication dependent docker registries

MoonlightServers.Daemon/Configuration/AppConfiguration.cs

@@ -18,6 +18,15 @@ public class AppConfiguration
     public class DockerData
     {
         public string Uri { get; set; } = "unix:///var/run/docker.sock";
+        public DockerCredentialData[] Credentials { get; set; } = [];
+        
+        public class DockerCredentialData
+        {
+            public string Domain { get; set; }
+            public string Username { get; set; }
+            public string Password { get; set; }
+            public string Email { get; set; }
+        }
     }
     
     public class SecurityData

MoonlightServers.Daemon/Services/DockerImageService.cs

@@ -1,6 +1,7 @@
 using Docker.DotNet;
 using Docker.DotNet.Models;
 using MoonCore.Attributes;
+using MoonlightServers.Daemon.Configuration;
 
 namespace MoonlightServers.Daemon.Services;
 
@@ -8,21 +9,43 @@ namespace MoonlightServers.Daemon.Services;
 public class DockerImageService
 {
     private readonly DockerClient DockerClient;
+    private readonly AppConfiguration Configuration;
     private readonly ILogger<DockerImageService> Logger;
 
-    public DockerImageService(DockerClient dockerClient, ILogger<DockerImageService> logger)
+    public DockerImageService(
+        DockerClient dockerClient,
+        ILogger<DockerImageService> logger,
+        AppConfiguration configuration
+    )
     {
+        Configuration = configuration;
         DockerClient = dockerClient;
         Logger = logger;
     }
 
     public async Task Ensure(string name, Action<string>? onProgressUpdated)
     {
+        // Figure out if and which credentials to use by checking for the domain
+        AuthConfig credentials = new();
+
+        var domain = GetDomainFromDockerImageName(name);
+
+        var configuredCredentials = Configuration.Docker.Credentials
+            .FirstOrDefault(x => x.Domain.Equals(domain, StringComparison.InvariantCultureIgnoreCase));
+
+        if (configuredCredentials != null)
+        {
+            credentials.Username = configuredCredentials.Username;
+            credentials.Password = configuredCredentials.Password;
+            credentials.Email = configuredCredentials.Email;
+        }
+        
+        // Now we want to pull the image
         await DockerClient.Images.CreateImageAsync(new()
             {
                 FromImage = name
             },
-            new AuthConfig(), // TODO: Config for custom registries
+            credentials,
             new Progress<JSONMessage>(async message =>
             {
                 if (message.Progress == null)
@@ -37,4 +60,18 @@ public class DockerImageService
             })
         );
     }
+
+    private string GetDomainFromDockerImageName(string name) // Method names are my passion ;)
+    {
+        var nameParts = name.Split("/");
+        
+        // If it has 1 part -> just the image name (e.g., "ubuntu")
+        // If it has 2 parts -> usually "user/image" (e.g., "library/ubuntu")
+        // If it has 3 or more -> assume first part is the registry domain
+
+        if (nameParts.Length >= 3 || (nameParts.Length >= 2 && nameParts[0].Contains('.') || nameParts[0].Contains(':')))
+            return nameParts[0]; // Registry domain is explicitly specified
+        
+        return "docker.io"; // Default Docker registry
+    }
 }