format-serialized-error.js

'use strict';
const trimOffNewlines = require('trim-off-newlines');
const chalk = require('../chalk').get();

function formatSerializedError(error) {
	const printMessage = error.values.length === 0 ?
		Boolean(error.message) :
		!error.values[0].label.startsWith(error.message);

	if (error.statements.length === 0 && error.values.length === 0) {
		return {formatted: null, printMessage};
	}

	let formatted = '';
	for (const value of error.values) {
		formatted += `${value.label}\n\n${trimOffNewlines(value.formatted)}\n\n`;
	}

	for (const statement of error.statements) {
		formatted += `${statement[0]}\n${chalk.grey('=>')} ${trimOffNewlines(statement[1])}\n\n`;
	}

	formatted = trimOffNewlines(formatted);
	return {formatted, printMessage};
}

module.exports = formatSerializedError;