init server

internal/storage/model/error.go

@@ -0,0 +1,68 @@
+package model
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/lib/pq"
+)
+
+var (
+	// 400
+	ErrBadRequestFormat = APIError{
+		Type:        "bad_format",
+		HTTPCode:    http.StatusBadRequest,
+		Description: "unable to read request body, please check that the json is valid",
+	}
+	ErrDataValidation = APIError{
+		Type:        "data_validation",
+		HTTPCode:    http.StatusBadRequest,
+		Description: "the data are not valid",
+	}
+
+	// 404
+	ErrNotFound = APIError{
+		Type:     "not_found",
+		HTTPCode: http.StatusNotFound,
+	}
+
+	// 40x
+	ErrAlreadyExists = APIError{
+		Type:     "already_exists",
+		HTTPCode: http.StatusConflict,
+	}
+
+	// 50x
+	ErrInternalServer = APIError{
+		Type:     "internal_server_error",
+		HTTPCode: http.StatusInternalServerError,
+	}
+)
+
+type APIError struct {
+	HTTPCode    int                 `json:"-"`
+	Type        string              `json:"error"`
+	Description string              `json:"error_description"`
+	Details     []FieldError        `json:"error_details,omitempty"`
+	Headers     map[string][]string `json:"-"`
+}
+
+type FieldError struct {
+	Field       string `json:"field"`
+	Constraint  string `json:"constraint"`
+	Description string `json:"description"`
+}
+
+func (e *APIError) Error() string {
+	return fmt.Sprintf("error : %d, %s, %s, %v", e.HTTPCode, e.Type, e.Description, e.Details)
+}
+
+func FromPostgresError(err *pq.Error) *APIError {
+	return &APIError{
+		HTTPCode:    0,
+		Type:        "",
+		Description: "",
+		Details:     nil,
+		Headers:     nil,
+	}
+}