multi IDP 모델 적용 scaffolding

backend/internal/service/descope_service.go

@@ -0,0 +1,62 @@
+package service
+
+import (
+	"baron-sso-backend/internal/domain"
+	"log/slog"
+
+	"github.com/descope/go-sdk/descope/client"
+)
+
+type DescopeProvider struct {
+	Client       *client.DescopeClient
+	fieldMapping map[string]string // Key: Broker Field Name, Value: Descope Attribute Key
+}
+
+func NewDescopeProvider(projectID, managementKey string) *DescopeProvider {
+	var descopeClient *client.DescopeClient
+	var err error
+	if projectID != "" {
+		descopeClient, err = client.NewWithConfig(&client.Config{
+			ProjectID:     projectID,
+			ManagementKey: managementKey,
+		})
+		if err != nil {
+			slog.Warn("Failed to initialize Descope Client in Provider", "error", err)
+		}
+	}
+
+	// Define the mapping between BrokerUser fields and Descope attributes.
+	// In a real scenario, this could be loaded from a config file.
+	// For this implementation, we hardcode the support to demonstrate the validation.
+	// We map the Broker's required custom attributes to Descope's keys.
+	mapping := map[string]string{
+		"grade":      "customAttributes.userRank", // Broker 'grade' maps to Descope 'userRank'
+		"department": "customAttributes.dept",     // Broker 'department' maps to Descope 'dept'
+	}
+
+	return &DescopeProvider{
+		Client:       descopeClient,
+		fieldMapping: mapping,
+	}
+}
+
+func (d *DescopeProvider) Name() string {
+	return "Descope"
+}
+
+// GetMetadata returns the schema support information.
+// Currently, it returns the standard fields Descope supports + the mapped custom attributes.
+func (d *DescopeProvider) GetMetadata() (*domain.IDPMetadata, error) {
+	// 1. Standard Fields supported by Descope
+	supported := []string{"id", "email", "name", "phone_number"}
+
+	// 2. Add mapped custom attributes
+	// The Validator checks if the Broker's required keys (e.g., "grade") are present in this list.
+	for brokerKey := range d.fieldMapping {
+		supported = append(supported, brokerKey)
+	}
+
+	return &domain.IDPMetadata{
+		SupportedFields: supported,
+	}, nil
+}