feat: implement repository layer for data access

- Add CertificateRepository with CRUD operations
- Implement CertificateAuthorityRepository for CA management
- Add CertificateRequestRepository for CSR handling
- Include UserRepository and OrganizationRepository
- Implement proper error handling and validation
- Add support for soft deletes and relationships
- Include query optimization and filtering capabilities

repositories/csr.go

@@ -0,0 +1,91 @@
+package repositories
+
+import (
+	"git.secnex.io/secnex/certman/models"
+	"gorm.io/gorm"
+)
+
+type CertificateRequestRepository struct {
+	db *gorm.DB
+}
+
+// NewCertificateRequestRepository creates a new certificate request repository
+func NewCertificateRequestRepository(db *gorm.DB) *CertificateRequestRepository {
+	return &CertificateRequestRepository{db: db}
+}
+
+// GetByID returns a certificate request by their ID
+func (r *CertificateRequestRepository) GetByID(id string) (models.CertificateRequest, error) {
+	var csr models.CertificateRequest
+	if err := r.db.First(&csr, id).Error; err != nil {
+		return models.CertificateRequest{}, err
+	}
+	return csr, nil
+}
+
+// GetAll returns all certificate requests
+func (r *CertificateRequestRepository) GetAll() ([]models.CertificateRequest, error) {
+	var csrs []models.CertificateRequest
+	if err := r.db.Find(&csrs).Error; err != nil {
+		return []models.CertificateRequest{}, err
+	}
+	return csrs, nil
+}
+
+// Create creates a new certificate request
+func (r *CertificateRequestRepository) Create(csr models.CertificateRequest) error {
+	return r.db.Create(&csr).Error
+}
+
+// Update updates a certificate request
+func (r *CertificateRequestRepository) Update(csr models.CertificateRequest) error {
+	return r.db.Save(&csr).Error
+}
+
+// Delete deletes a certificate request by their ID
+func (r *CertificateRequestRepository) Delete(id string) error {
+	return r.db.Delete(&models.CertificateRequest{}, id).Error
+}
+
+// HardDelete deletes a certificate request by their ID
+func (r *CertificateRequestRepository) HardDelete(csr models.CertificateRequest) error {
+	return r.db.Unscoped().Delete(&csr).Error
+}
+
+// GetByStatus returns certificate requests by status
+func (r *CertificateRequestRepository) GetByStatus(status models.RequestStatus) ([]models.CertificateRequest, error) {
+	var csrs []models.CertificateRequest
+	if err := r.db.Where("status = ?", status).Find(&csrs).Error; err != nil {
+		return []models.CertificateRequest{}, err
+	}
+	return csrs, nil
+}
+
+// GetPending returns all pending certificate requests
+func (r *CertificateRequestRepository) GetPending() ([]models.CertificateRequest, error) {
+	return r.GetByStatus(models.RequestStatusPending)
+}
+
+// GetApproved returns all approved certificate requests
+func (r *CertificateRequestRepository) GetApproved() ([]models.CertificateRequest, error) {
+	return r.GetByStatus(models.RequestStatusApproved)
+}
+
+// GetRejected returns all rejected certificate requests
+func (r *CertificateRequestRepository) GetRejected() ([]models.CertificateRequest, error) {
+	return r.GetByStatus(models.RequestStatusRejected)
+}
+
+// GetCancelled returns all cancelled certificate requests
+func (r *CertificateRequestRepository) GetCancelled() ([]models.CertificateRequest, error) {
+	return r.GetByStatus(models.RequestStatusCancelled)
+}
+
+// GetByCA returns certificate requests for a specific CA
+func (r *CertificateRequestRepository) GetByCA(caID string) ([]models.CertificateRequest, error) {
+	var csrs []models.CertificateRequest
+	if err := r.db.Where("certificate_authority_id = ?", caID).Find(&csrs).Error; err != nil {
+		return []models.CertificateRequest{}, err
+	}
+	return csrs, nil
+}