Add coa purchase and vendors

internal/validator/chart_of_account_validator.go

@@ -0,0 +1,78 @@
+package validator
+
+import (
+	"apskel-pos-be/internal/models"
+	"fmt"
+	"strings"
+
+	"github.com/go-playground/validator/v10"
+)
+
+type ChartOfAccountValidator interface {
+	ValidateCreateChartOfAccount(req *models.CreateChartOfAccountRequest) error
+	ValidateUpdateChartOfAccount(req *models.UpdateChartOfAccountRequest) error
+}
+
+type ChartOfAccountValidatorImpl struct {
+	validator *validator.Validate
+}
+
+func NewChartOfAccountValidator() ChartOfAccountValidator {
+	return &ChartOfAccountValidatorImpl{
+		validator: validator.New(),
+	}
+}
+
+func (v *ChartOfAccountValidatorImpl) ValidateCreateChartOfAccount(req *models.CreateChartOfAccountRequest) error {
+	if err := v.validator.Struct(req); err != nil {
+		return err
+	}
+
+	// Additional custom validations
+	if strings.TrimSpace(req.Name) == "" {
+		return fmt.Errorf("name cannot be empty")
+	}
+
+	if strings.TrimSpace(req.Code) == "" {
+		return fmt.Errorf("code cannot be empty")
+	}
+
+	// Validate code format (alphanumeric)
+	if !isValidAccountCodeFormat(req.Code) {
+		return fmt.Errorf("code must be alphanumeric")
+	}
+
+	return nil
+}
+
+func (v *ChartOfAccountValidatorImpl) ValidateUpdateChartOfAccount(req *models.UpdateChartOfAccountRequest) error {
+	if err := v.validator.Struct(req); err != nil {
+		return err
+	}
+
+	// Additional custom validations
+	if req.Name != nil && strings.TrimSpace(*req.Name) == "" {
+		return fmt.Errorf("name cannot be empty")
+	}
+
+	if req.Code != nil && strings.TrimSpace(*req.Code) == "" {
+		return fmt.Errorf("code cannot be empty")
+	}
+
+	// Validate code format if provided
+	if req.Code != nil && !isValidAccountCodeFormat(*req.Code) {
+		return fmt.Errorf("code must be alphanumeric")
+	}
+
+	return nil
+}
+
+func isValidAccountCodeFormat(code string) bool {
+	// Check if code is alphanumeric
+	for _, char := range code {
+		if !((char >= 'A' && char <= 'Z') || (char >= 'a' && char <= 'z') || (char >= '0' && char <= '9')) {
+			return false
+		}
+	}
+	return true
+}