PhorgeSystemDeprecationWarningListener.php
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PhorgeSystemDeprecationWarningListener.php
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	<?php

	final class PhorgeSystemDeprecationWarningListener
	extends PhabricatorEventListener {

	const CACHE_KEY = 'setup-check:deprecation-warnings';
	const MAX_ENTRIES = 5;

	public function handleEvent(PhutilEvent $event) {
	// we're not an actual PhutilEventListener - we're just using the `register`
	// part of that framework.
	}

	public function register() {
	PhutilErrorHandler::addErrorListener(
	array($this, 'handleErrors'));
	}

	public function handleErrors($event, $value, $metadata) {

	if ($event !== PhutilErrorHandler::DEPRECATED) {
	return;
	}

	$trace_key = sprintf(
	'%s:%s',
	basename($metadata['file']),
	$metadata['line']);

	$cache = PhabricatorCaches::getRuntimeCache();
	$cache_entry = $cache->getKey(self::CACHE_KEY);

	if (!$cache_entry) {
	$cache_entry = array();
	}

	$trace_entry = idx($cache_entry, $trace_key);

	if ($trace_entry) {
	$trace_entry['counter']++;
	} else {
	$trace_entry = array(
	'counter' => 1,
	'message' => $value,
	'trace' => PhutilErrorHandler::formatStacktrace($metadata['trace']),
	);
	}
	$cache_entry[$trace_key] = $trace_entry;

	$cache->setKey(self::CACHE_KEY , $cache_entry);
	}

	public function getWarnings() {
	$cache = PhabricatorCaches::getRuntimeCache();
	return $cache->getKey(self::CACHE_KEY);
	}

	}