feat(oci): oci helm support [r8s-361] (#787)

pkg/liboras/gitlab_listrepo_client.go

@@ -0,0 +1,47 @@
+package liboras
+
+import (
+	"context"
+	"fmt"
+
+	portainer "github.com/portainer/portainer/api"
+	"github.com/portainer/portainer/api/http/proxy/factory/gitlab"
+	"github.com/rs/zerolog/log"
+)
+
+// GitlabListRepoClient implements RepositoryListClient specifically for GitLab registries
+// This client handles the GitLab Container Registry API's unique repository listing implementation
+type GitlabListRepoClient struct {
+	registry *portainer.Registry
+	client   *gitlab.Client
+}
+
+// NewGitlabListRepoClient creates a new GitLab repository listing client
+func NewGitlabListRepoClient(registry *portainer.Registry) *GitlabListRepoClient {
+	client := gitlab.NewClient(registry.Gitlab.InstanceURL, registry.Password)
+
+	return &GitlabListRepoClient{
+		registry: registry,
+		client:   client,
+	}
+}
+
+// ListRepositories fetches repositories from a GitLab registry using the GitLab API
+func (c *GitlabListRepoClient) ListRepositories(ctx context.Context) ([]string, error) {
+	repositories, err := c.client.GetRegistryRepositoryNames(ctx, c.registry.Gitlab.ProjectID)
+	if err != nil {
+		log.Error().
+			Str("registry_name", c.registry.Name).
+			Err(err).
+			Msg("Failed to list GitLab repositories")
+		return nil, fmt.Errorf("failed to list GitLab repositories: %w", err)
+	}
+
+	log.Debug().
+		Str("gitlab_url", c.registry.Gitlab.InstanceURL).
+		Int("project_id", c.registry.Gitlab.ProjectID).
+		Int("repository_count", len(repositories)).
+		Msg("Successfully listed GitLab repositories")
+
+	return repositories, nil
+}