legendaryjs/core/helpers/validate.js

LegendaryJS – The ultimate backend framework for speed, power, and simplicity.

function validate(data = {}, schema = {}) {
  const errors = [];

  for (const key in schema) {
    const rules = schema[key];
    const value = data[key];

    if (rules.required && (value === undefined || value === null || value === '')) {
      errors.push(`${key} is required`);
    }

    if (rules.type && typeof value !== rules.type.toLowerCase()) {
      errors.push(`${key} must be of type ${rules.type}`);
    }

    if (rules.min && typeof value === 'string' && value.length < rules.min) {
      errors.push(`${key} must be at least ${rules.min} characters`);
    }

    if (rules.max && typeof value === 'string' && value.length > rules.max) {
      errors.push(`${key} must be at most ${rules.max} characters`);
    }

    if (rules.enum && !rules.enum.includes(value)) {
      errors.push(`${key} must be one of: ${rules.enum.join(', ')}`);
    }
  }

  return {
    valid: errors.length === 0,
    errors
  };
}

module.exports = { validate };