This is an open-source schema validation toolkit inspired by zod.dev. It provides a simple and expressive API for validating strings, numbers, struct, ... with various constraints. Schema is designed to be easy to use, extensible, and suitable for a wide range of applications.

Feel free to use and modify it for any purpose. If you have any suggestions for improvement, please don't hesitate to reach out. Thank you!

Features include:

• String Validation: Min/Max length, email format, and more.
• Number Validation: Min/Max value, integer check, positive/negative, even/odd, divisibility, and more.
• Custom Error Messages: Provide custom error messages for failed validations.
• Composability: Combine multiple validations easily.
• Extensible: Easy to add custom validation logic.

To install this package, use go get:

go get github.com/mkafonso/schema

• Install schema with one line of code
• Check out the API Documentation https://pkg.go.dev/github.com/mkafonso/schema

• Minimum Length: Ensure the string has a minimum length.
• Maximum Length: Ensure the string does not exceed a maximum length.
• Email Format: Validate the string as an email format.

See it in action:

package yours

import (
	"fmt"

	"github.com/mkafonso/schema/pkg/validator"
)

func ValidateEmailExample() {
	input := "[email protected]"

	// Defining a validation schema
	stringValidator := validator.NewStringValidator().
		MinLength(5, "A string deve ter no mínimo 5 caracteres").   // Sets minimum length constraint
		MaxLength(50, "A string deve ter no máximo 50 caracteres"). // Sets maximum length constraint
		IsEmail("Formato de email inválido")                        // Validates as an email format

	// Validating the input
	result := stringValidator.Validate(input)

	// Handling validation result
	if result.IsValid {
		fmt.Println("Validation successful!") // Message for successful validation
	} else {
		fmt.Println("Validation error:", result.Errors) // Printing validation errors
	}
}

This project is licensed under the terms of the MIT license.