silverstripe-framework/Dev/Debug.php

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<?php
namespace SilverStripe\Dev;
use SilverStripe\Control\Director;
use SilverStripe\Core\Convert;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\ORM\DB;
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use SilverStripe\Security\Permission;
use SilverStripe\Security\Security;
/**
* Supports debugging and core error handling.
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*
* Attaches custom methods to the default error handling hooks
* in PHP. Currently, two levels of error are supported:
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*
* - Notice
* - Warning
* - Error
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*
* Uncaught exceptions are currently passed to the debug
* reporter as standard PHP errors.
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*
* Errors handled by this class are passed along to {@link SS_Log}.
* For configuration information, see the {@link SS_Log}
* class documentation.
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*
* @todo add support for user defined config: Debug::die_on_notice(true | false)
* @todo better way of figuring out the error context to display in highlighted source
*/
class Debug {
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/**
* Show the contents of val in a debug-friendly way.
* Debug::show() is intended to be equivalent to dprintr()
*
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* @param mixed $val
* @param bool $showHeader
*/
public static function show($val, $showHeader = true) {
if(!Director::isLive()) {
if($showHeader) {
$caller = Debug::caller();
if(Director::is_ajax() || Director::is_cli())
echo "Debug ($caller[class]$caller[type]$caller[function]() in " . basename($caller['file'])
. ":$caller[line])\n";
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else
echo "<div style=\"background-color: white; text-align: left;\">\n<hr>\n"
. "<h3>Debug <span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]()"
. " \nin " . basename($caller['file']) . ":$caller[line])</span>\n</h3>\n";
}
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echo Debug::text($val);
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if(!Director::is_ajax() && !Director::is_cli()) echo "</div>";
else echo "\n\n";
}
}
/**
* Returns the caller for a specific method
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*
* @return array
*/
public static function caller() {
$bt = debug_backtrace();
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$caller = isset($bt[2]) ? $bt[2] : array();
$caller['line'] = $bt[1]['line'];
$caller['file'] = $bt[1]['file'];
if(!isset($caller['class'])) $caller['class'] = '';
if(!isset($caller['type'])) $caller['type'] = '';
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if(!isset($caller['function'])) $caller['function'] = '';
return $caller;
}
/**
* Close out the show dumper
*
* @param mixed $val
*/
public static function endshow($val) {
if(!Director::isLive()) {
$caller = Debug::caller();
echo "<hr>\n<h3>Debug \n<span style=\"font-size: 65%\">($caller[class]$caller[type]$caller[function]()"
. " \nin " . basename($caller['file']) . ":$caller[line])</span>\n</h3>\n";
echo Debug::text($val);
die();
}
}
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/**
* Quick dump of a variable.
*
* @param mixed $val
*/
public static function dump($val) {
echo self::create_debug_view()->renderVariable($val, self::caller());
}
/**
* @param mixed $val
* @return string
*/
public static function text($val) {
if(is_object($val)) {
if(method_exists($val, 'hasMethod')) {
$hasDebugMethod = $val->hasMethod('debug');
} else {
$hasDebugMethod = method_exists($val, 'debug');
}
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if($hasDebugMethod) {
return $val->debug();
}
}
if(is_array($val)) {
$result = "<ul>\n";
foreach($val as $k => $v) {
$result .= "<li>$k = " . Debug::text($v) . "</li>\n";
}
$val = $result . "</ul>\n";
} else if (is_object($val)) {
$val = var_export($val, true);
} else if (is_bool($val)) {
$val = $val ? 'true' : 'false';
$val = '(bool) ' . $val;
} else {
if(!Director::is_cli() && !Director::is_ajax()) {
$val = "<pre style=\"font-family: Courier new\">" . htmlentities($val, ENT_COMPAT, 'UTF-8')
. "</pre>\n";
}
}
return $val;
}
/**
* Show a debugging message
*
* @param string $message
* @param bool $showHeader
*/
public static function message($message, $showHeader = true) {
if(!Director::isLive()) {
$caller = Debug::caller();
$file = basename($caller['file']);
if(Director::is_cli()) {
if($showHeader) echo "Debug (line $caller[line] of $file):\n ";
echo $message . "\n";
} else {
echo "<p class=\"message warning\">\n";
if($showHeader) echo "<b>Debug (line $caller[line] of $file):</b>\n ";
echo Convert::raw2xml($message) . "</p>\n";
}
}
}
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/**
* Create an instance of an appropriate DebugView object.
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*
* @return DebugView
*/
public static function create_debug_view() {
$service = Director::is_cli() || Director::is_ajax()
? 'SilverStripe\\Dev\\CliDebugView'
: 'SilverStripe\\Dev\\DebugView';
return Injector::inst()->get($service);
}
/**
* Check if the user has permissions to run URL debug tools,
* else redirect them to log in.
*/
public static function require_developer_login() {
if(Director::isDev()) {
return;
}
if(isset($_SESSION['loggedInAs'])) {
// We have to do some raw SQL here, because this method is called in Object::defineMethods().
// This means we have to be careful about what objects we create, as we don't want Object::defineMethods()
// being called again.
// This basically calls Permission::checkMember($_SESSION['loggedInAs'], 'ADMIN');
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// @TODO - Rewrite safely using DataList::filter
$memberID = $_SESSION['loggedInAs'];
$permission = DB::prepared_query('
SELECT "ID" FROM "Permission"
INNER JOIN "Group_Members" ON "Permission"."GroupID" = "Group_Members"."GroupID"
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WHERE "Permission"."Code" = ?
AND "Permission"."Type" = ?
AND "Group_Members"."MemberID" = ?',
array(
'ADMIN', // Code
Permission::GRANT_PERMISSION, // Type
$memberID // MemberID
)
)->value();
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if($permission) return;
}
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// This basically does the same as
// Security::permissionFailure(null, "You need to login with developer access to make use of debugging tools.")
// We have to do this because of how early this method is called in execution.
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$_SESSION['SilverStripe\\Security\\Security']['Message']['message']
= "You need to login with developer access to make use of debugging tools.";
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$_SESSION['SilverStripe\\Security\\Security']['Message']['type'] = 'warning';
$_SESSION['BackURL'] = $_SERVER['REQUEST_URI'];
header($_SERVER['SERVER_PROTOCOL'] . " 302 Found");
header("Location: " . Director::baseURL() . Security::login_url());
die();
}
}