/**
 * Utils
 */

const bcrypt = require(`bcryptjs`);

/**
 * Build a custom error
 * @param {string} message Error message
 * @param {number} code Error code, should be HTTP status code
 */
const customError = (message, code) => {
	const error = new Error(message);
	error.code = code;
	return error;
};

/**
 * Build a custom validation error
 * @param {array[string]} validationErrors Validation errors
 */
const validationError = (validationErrors) => {
	let error = new Error("Validation error(s)");
	error.validationErrors = validationErrors;
	error.code = 400;
	return error;
};

/**
 * Hash password
 * @param {string} password Password to hash
 */
const hashPassword = (password) => {
	const salt = bcrypt.genSaltSync(10);
	return bcrypt.hashSync(password, salt);
};

/**
 * Compare password
 * @param {string} candidatePassword Hashed password supplied by user
 * @param {string} trustedPassword Hashed password on record for user
 */
const comparePassword = (candidatePassword, trustedPassword) => {
	return bcrypt.compareSync(candidatePassword, trustedPassword);
};

module.exports = {
	customError,
	validationError,
	hashPassword,
	comparePassword,
};