ArcanistUserSymbolRef.php
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ArcanistUserSymbolRef.php
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	<?php

	final class ArcanistUserSymbolRef
	extends ArcanistSymbolRef {

	private $type;

	const TYPE_ID = 'id';
	const TYPE_PHID = 'phid';
	const TYPE_USERNAME = 'username';
	const TYPE_FUNCTION = 'function';

	public function getRefDisplayName() {
	return pht('User Symbol "%s"', $this->getSymbol());
	}

	protected function newCacheKeyParts() {
	return array(
	sprintf('type(%s)', $this->type),
	);
	}

	public function getSymbolType() {
	return $this->type;
	}

	protected function resolveSymbol($symbol) {
	$matches = null;

	$is_id = preg_match('/^([1-9]\d*)\z/', $symbol, $matches);
	if ($is_id) {
	$this->type = self::TYPE_ID;
	return (int)$matches[1];
	}

	$is_phid = preg_match('/^PHID-USER-\S+\z/', $symbol, $matches);
	if ($is_phid) {
	$this->type = self::TYPE_PHID;
	return $matches[0];
	}

	$is_function = preg_match('/^\S+$\s$\s\z/', $symbol, $matches);
	if ($is_function) {
	$this->type = self::TYPE_FUNCTION;
	return $matches[0];
	}

	$is_username = preg_match('/^@?(\S+)\z/', $symbol, $matches);
	if ($is_username) {
	$this->type = self::TYPE_USERNAME;
	return $matches[1];
	}

	throw new PhutilArgumentUsageException(
	pht(
	'The format of user symbol "%s" is unrecognized. Expected a '.
	'username like "alice" or "@alice", or a user PHID, or a user '.
	'ID, or a special function like "viewer()".',
	$symbol));
	}

	}