fastest-validator/lib/rules/email.js

The fastest JS validator library for NodeJS

"use strict";

const PRECISE_PATTERN = /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
const BASIC_PATTERN = /^\S+@\S+\.\S+$/;

/**	Signature: function(value, field, parent, errors, context)
 */
module.exports = function({ schema, messages }, path, context) {
	const src = [];

	const pattern = schema.mode == "precise" ? PRECISE_PATTERN : BASIC_PATTERN;
	let sanitized = false;

	src.push(`
		if (typeof value !== "string") {
			${this.makeError({ type: "string",  actual: "value", messages })}
			return value;
		}
	`);

	if (!schema.empty) {
		src.push(`
			if (value.length === 0) {
				${this.makeError({ type: "emailEmpty", actual: "value", messages })}
				return value;
			}
		`);
	} else {
		src.push(`
			if (value.length === 0) return value;
		`);
	}

	if (schema.normalize) {
		sanitized = true;
		src.push(`
			value = value.trim().toLowerCase();
		`);
	}

	if (schema.min != null) {
		src.push(`
			if (value.length < ${schema.min}) {
				${this.makeError({ type: "emailMin", expected: schema.min, actual: "value.length", messages })}
			}
		`);
	}

	if (schema.max != null) {
		src.push(`
			if (value.length > ${schema.max}) {
				${this.makeError({ type: "emailMax", expected: schema.max, actual: "value.length", messages })}
			}
		`);
	}

	src.push(`
		if (!${pattern.toString()}.test(value)) {
			${this.makeError({ type: "email",  actual: "value", messages })}
		}

		return value;
	`);

	return {
		sanitized,
		source: src.join("\n")
	};
};