PhutilEmailAddress.php
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	<?php

	/**
	* Basic email address parser. This parser is very liberal and does not attempt
	* to be fully RFC-compliant, because trying to do so is a crazy mess. However,
	* it should parse all reasonable addresses which are actually in use on the
	* internet today.
	*/
	final class PhutilEmailAddress extends Phobject {

	private $displayName;
	private $localPart;
	private $domainName;

	public function __construct($email_address = null) {
	$email_address = trim($email_address);

	$matches = null;
	if (preg_match('/^(.)<(.?)>$/', $email_address, $matches)) {
	$display_name = trim($matches[1], '\'" ');
	if (strpos($matches[2], '@') !== false) {
	list($local_part, $domain_name) = explode('@', $matches[2], 2);
	} else {
	$local_part = $matches[2];
	$domain_name = null;
	}
	} else if (preg_match('/^(.)@(.)$/', $email_address, $matches)) {
	$display_name = null;
	$local_part = $matches[1];
	$domain_name = $matches[2];
	} else {
	$display_name = null;
	$local_part = $email_address;
	$domain_name = null;
	}

	$this->displayName = $display_name;
	$this->localPart = $local_part;
	$this->domainName = $domain_name;
	}

	public function __toString() {
	$address = $this->getAddress();
	if (strlen($this->displayName)) {
	$display_name = $this->encodeDisplayName($this->displayName);
	return $display_name.' <'.$address.'>';
	} else {
	return $address;
	}
	}

	public function setDisplayName($display_name) {
	$this->displayName = $display_name;
	return $this;
	}

	public function getDisplayName() {
	return $this->displayName;
	}

	public function setLocalPart($local_part) {
	$this->localPart = $local_part;
	return $this;
	}

	public function getLocalPart() {
	return $this->localPart;
	}

	public function setDomainName($domain_name) {
	$this->domainName = $domain_name;
	return $this;
	}

	public function getDomainName() {
	return $this->domainName;
	}

	public function setAddress($address) {
	$parts = explode('@', $address, 2);

	$this->localPart = $parts[0];
	if (isset($parts[1])) {
	$this->domainName = $parts[1];
	}

	return $this;
	}

	public function getAddress() {
	$address = $this->localPart;
	if (strlen($this->domainName)) {
	$address .= '@'.$this->domainName;
	}
	return $address;
	}

	private function encodeDisplayName($name) {
	// NOTE: This is a reasonable effort based on a cursory reading of
	// RFC2822, but may be significantly misguided.

	// Newlines are not permitted, even when escaped. Discard them.
	$name = preg_replace("/\s[\r\n]+\s/", ' ', $name);

	// Escape double quotes and backslashes.
	$name = addcslashes($name, '\\"');

	// Quote the string.
	$name = '"'.$name.'"';

	return $name;
	}

	}

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