AzenKain
4e1e9892ac
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Build and Release / release (push) Successful in 1m8s
119 lines
2.7 KiB
Go
119 lines
2.7 KiB
Go
package validator
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import (
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"errors"
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"net/url"
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"path"
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"reflect"
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"strings"
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"github.com/go-playground/validator/v10"
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"github.com/gofiber/fiber/v3"
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)
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var validate = validator.New()
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func init() {
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validate.RegisterTagNameFunc(func(fld reflect.StructField) string {
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name := strings.SplitN(fld.Tag.Get("json"), ",", 2)[0]
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if name == "-" {
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return ""
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}
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if name == "" {
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name = strings.SplitN(fld.Tag.Get("query"), ",", 2)[0]
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}
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return name
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})
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validate.RegisterValidation("image_url", func(fl validator.FieldLevel) bool {
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val := fl.Field().String()
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if val == "" {
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return true
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}
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return isImageURL(val)
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})
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}
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func isImageURL(u string) bool {
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parsed, err := url.Parse(u)
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if err != nil {
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return false
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}
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ext := strings.ToLower(path.Ext(parsed.Path))
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switch ext {
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case ".jpg", ".jpeg", ".png", ".gif", ".webp":
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return true
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default:
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return false
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}
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}
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type ErrorResponse struct {
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FailedField string `json:"failed_field,omitempty"`
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Tag string `json:"tag,omitempty"`
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Value string `json:"value,omitempty"`
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Message string `json:"message"`
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}
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func formatValidationError(err error) []*ErrorResponse {
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var validationErrors validator.ValidationErrors
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var errorsList []*ErrorResponse
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if errors.As(err, &validationErrors) {
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for _, fieldError := range validationErrors {
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message := ""
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switch fieldError.Tag() {
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case "required":
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message = fieldError.Field() + " is mandatory"
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case "email":
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message = "The email address is invalid"
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case "min":
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message = fieldError.Field() + " is too short (min " + fieldError.Param() + ")"
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case "max":
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message = fieldError.Field() + " is too long (max " + fieldError.Param() + ")"
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case "image_url":
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message = fieldError.Field() + " must be a link to an image (jpg, png, etc.)"
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default:
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message = "Field " + fieldError.Field() + " failed on validation: " + fieldError.Tag()
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}
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errorsList = append(errorsList, &ErrorResponse{
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FailedField: fieldError.Field(),
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Tag: fieldError.Tag(),
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Value: fieldError.Param(),
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Message: message,
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})
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}
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} else {
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errorsList = append(errorsList, &ErrorResponse{
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Message: "Invalid request payload: " + err.Error(),
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})
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}
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return errorsList
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}
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func ValidateQueryDto(c fiber.Ctx, dto any) []*ErrorResponse {
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if err := c.Bind().Query(dto); err != nil {
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return formatValidationError(err)
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}
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if err := validate.Struct(dto); err != nil {
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return formatValidationError(err)
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}
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return nil
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}
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func ValidateBodyDto(c fiber.Ctx, dto any) []*ErrorResponse {
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if err := c.Bind().Body(dto); err != nil {
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return formatValidationError(err)
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}
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if err := validate.Struct(dto); err != nil {
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return formatValidationError(err)
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}
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return nil
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} |