* @todo Method to set view template and remove html code from draw() method
* @todo Avoid the use of highlight_string() to make php syntax highlight
*/
abstract class ExceptionCatcher
{
/**
* @param Exception $oExp
*/
public static function handle(Exception $oExp)
{
echo static::draw($oExp);
}
/**
* @param Exception $oExp
* @return string
*/
public static function draw(Exception $oExp)
{
$details = static::buildDetails($oExp);
$content = sprintf('Exception: %s
', $oExp->getMessage());
$content .= sprintf('At: %s:%s
', $oExp->getFile(), $oExp->getLine());
$content .= sprintf('Trace
');
foreach ($details as $items) {
if (isset($items['trace'])) {
$content .= sprintf("
%s:%d
\n", $items['file'], $items['line']);
$content .= static::getHighlightedCode($items['trace'], true);
}
}
return $content;
}
/**
* @param array $trace
* @return string
*/
protected function getHighlightedCode(array $trace, $showLineNumber = false)
{
$content = '';
foreach ($trace as $line) {
if (! isset($line['lineContent'])) {
return;
}
$content .= $showLineNumber ?
sprintf("%d %s\n", $line['lineNumber'], $line['lineContent']) :
sprintf("%s\n", $line['lineContent']);
}
$str = highlight_string('getFile(), $oExp->getLine());
foreach ($oExp->getTrace() as $files) {
$arr[] = static::getDetails($files['file'], $files['line']);
}
return $arr;
}
/**
* @param string $file
* @param int $line
* @return array
*/
protected function getDetails($file, $line)
{
$lines = file_get_contents($file); //validate
$lines = explode("\n", $lines);
$trace = array();
foreach (range($line - 4, $line + 2) as $fetchLine) {
if (isset($lines[$fetchLine])) {
$n = strlen($fetchLine + 10);
$lineKey = sprintf('%0'.$n.'d', $fetchLine + 1);
$trace[$lineKey] = array(
'lineContent' => $lines[$fetchLine],
'lineNumber' => $lineKey
);
}
}
return array(
'file' => $file,
'line' => $line,
'trace' => $trace,
);
}
/**
* @return void
*/
public static function register()
{
set_exception_handler(array(__CLASS__, 'handle'));
}
/**
* @return void
*/
public static function unregister()
{
restore_exception_handler();
}
}