devel.module

<?php


/**
 * @file
 * This module holds functions useful for Drupal development.
 * Please contribute!
 */
define('DEVEL_ERROR_HANDLER_NONE', 0);
define('DEVEL_ERROR_HANDLER_STANDARD', 1);
define('DEVEL_ERROR_HANDLER_BACKTRACE_KINT', 2);
define('DEVEL_ERROR_HANDLER_BACKTRACE_DPM', 4);
define('DEVEL_MIN_TEXTAREA', 50);
use Drupal\comment\CommentInterface;
use Drupal\Core\Database\Database;
use Drupal\Core\Database\Query\AlterableInterface;
use Drupal\Core\Entity\EntityInterface;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Logger\RfcLogLevel;
use Drupal\Core\Menu\LocalTaskDefault;
use Drupal\Core\Render\Element;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\Core\Url;
use Drupal\Core\Utility\Error;
use Drupal\devel\EntityTypeInfo;
use Drupal\devel\ToolbarHandler;
use Drupal\Core\StringTranslation\TranslatableMarkup;

/**
 * Implements hook_help().
 */
function devel_help($route_name, RouteMatchInterface $route_match) {
    switch ($route_name) {
        case 'help.page.devel':
            $output = '';
            $output .= '<h3>' . t('About') . '</h3>';
            $output .= '<p>' . t('The Devel module provides a suite of modules containing fun for module developers and themers. For more information, see the <a href=":url">online documentation for the Devel module</a>.', [
                ':url' => 'https://www.drupal.org/docs/8/modules/devel',
            ]) . '</p>';
            $output .= '<h3>' . t('Uses') . '</h3>';
            $output .= '<dl>';
            $output .= '<dt>' . t('Inspecting Service Container') . '</dt>';
            $output .= '<dd>' . t('The module allows you to inspect Services and Parameters registered in the Service Container. You can see those informations on <a href=":url">Container info</a> page.', [
                ':url' => Url::fromRoute('devel.container_info.service')->toString(),
            ]) . '</dd>';
            $output .= '<dt>' . t('Inspecting Routes') . '</dt>';
            $output .= '<dd>' . t('The module allows you to inspect routes information, gathering all routing data from <em>.routing.yml</em> files and from classes which subscribe to the route build/alter events. You can see those informations on <a href=":url">Routes info</a> page.', [
                ':url' => Url::fromRoute('devel.route_info')->toString(),
            ]) . '</dd>';
            $output .= '<dt>' . t('Inspecting Events') . '</dt>';
            $output .= '<dd>' . t('The module allow you to inspect listeners registered in the event dispatcher. You can see those informations on <a href=":url">Events info</a> page.', [
                ':url' => Url::fromRoute('devel.event_info')->toString(),
            ]) . '</dd>';
            $output .= '</dl>';
            return $output;
        case 'devel.container_info.service':
        case 'devel.container_info.parameter':
            $output = '';
            $output .= '<p>' . t('Displays Services and Parameters registered in the Service Container. For more informations on the Service Container, see the <a href=":url">Symfony online documentation</a>.', [
                ':url' => 'http://symfony.com/doc/current/service_container.html',
            ]) . '</p>';
            return $output;
        case 'devel.route_info':
            $output = '';
            $output .= '<p>' . t('Displays registered routes for the site. For a complete overview of the routing system, see the <a href=":url">online documentation</a>.', [
                ':url' => 'https://www.drupal.org/docs/8/api/routing-system',
            ]) . '</p>';
            return $output;
        case 'devel.event_info':
            $output = '';
            $output .= '<p>' . t('Displays events and listeners registered in the event dispatcher. For a complete overview of the event system, see the <a href=":url">Symfony online documentation</a>.', [
                ':url' => 'http://symfony.com/doc/current/components/event_dispatcher.html',
            ]) . '</p>';
            return $output;
        case 'devel.reinstall':
            $output = '<p>' . t('<strong>Warning</strong> - will delete your module tables and configuration.') . '</p>';
            $output .= '<p>' . t('Uninstall and then install the selected modules. <code>hook_uninstall()</code> and <code>hook_install()</code> will be executed and the schema version number will be set to the most recent update number.') . '</p>';
            return $output;
        case 'devel/session':
            return '<p>' . t('Here are the contents of your <code>$_SESSION</code> variable.') . '</p>';
        case 'devel.state_system_page':
            return '<p>' . t('This is a list of state variables and their values. For more information read online documentation of <a href=":documentation">State API in Drupal 8</a>.', array(
                ':documentation' => "https://www.drupal.org/developing/api/8/state",
            )) . '</p>';
        case 'devel.layout_info':
            $output = '';
            $output .= '<p>' . t('Displays layouts available to the site. For a complete overview of the layout system, see the <a href=":url">Layout API documentation</a>.', [
                ':url' => 'https://www.drupal.org/docs/8/api/layout-api',
            ]) . '</p>';
            return $output;
    }
}

/**
 * Implements hook_entity_type_alter().
 */
function devel_entity_type_alter(array &$entity_types) {
    return \Drupal::service('class_resolver')->getInstanceFromDefinition(EntityTypeInfo::class)
        ->entityTypeAlter($entity_types);
}

/**
 * Implements hook_entity_operation().
 */
function devel_entity_operation(EntityInterface $entity) {
    return \Drupal::service('class_resolver')->getInstanceFromDefinition(EntityTypeInfo::class)
        ->entityOperation($entity);
}

/**
 * Implements hook_toolbar().
 */
function devel_toolbar() {
    return \Drupal::service('class_resolver')->getInstanceFromDefinition(ToolbarHandler::class)
        ->toolbar();
}

/**
 * Implements hook_menu_links_discovered_alter().
 */
function devel_menu_links_discovered_alter(&$links) {
    // Conditionally add the Layouts info menu link.
    if (\Drupal::moduleHandler()->moduleExists('layout_discovery')) {
        $links['devel.layout_info'] = [
            'title' => new TranslatableMarkup('Layouts Info'),
            'route_name' => 'devel.layout_info',
            'description' => new TranslatableMarkup('Overview of layouts available to the site.'),
            'menu_name' => 'devel',
        ];
    }
}

/**
 * Implements hook_local_tasks_alter().
 */
function devel_local_tasks_alter(&$local_tasks) {
    if (\Drupal::moduleHandler()->moduleExists('toolbar')) {
        $local_tasks['devel.toolbar.settings_form'] = [
            'title' => 'Toolbar Settings',
            'base_route' => 'devel.admin_settings',
            'route_name' => 'devel.toolbar.settings_form',
            'class' => LocalTaskDefault::class,
            'options' => [],
        ];
    }
}

/**
 * Sets message.
 */
function devel_set_message($msg, $type = NULL) {
    if (function_exists('drush_log')) {
        drush_log($msg, $type);
    }
    else {
        drupal_set_message($msg, $type, TRUE);
    }
}

/**
 * Gets error handlers.
 */
function devel_get_handlers() {
    $error_handlers = \Drupal::config('devel.settings')->get('error_handlers');
    if (!empty($error_handlers)) {
        unset($error_handlers[DEVEL_ERROR_HANDLER_NONE]);
    }
    return $error_handlers;
}

/**
 * Sets a new error handler or restores the prior one.
 */
function devel_set_handler($handlers) {
    if (empty($handlers)) {
        restore_error_handler();
    }
    elseif (count($handlers) == 1 && isset($handlers[DEVEL_ERROR_HANDLER_STANDARD])) {
        // Do nothing.
    }
    else {
        set_error_handler('backtrace_error_handler');
    }
}

/**
 * Displays backtrace showing the route of calls to the current error.
 *
 * @param int $error_level
 *   The level of the error raised.
 * @param string $message
 *   The error message.
 * @param string $filename
 *   The filename that the error was raised in.
 * @param int $line
 *   The line number the error was raised at.
 * @param array $context
 *   An array that points to the active symbol table at the point the error
 *   occurred.
 */
function backtrace_error_handler($error_level, $message, $filename, $line, $context) {
    // Hide stack trace and parameters from unqualified users.
    if (!\Drupal::currentUser()->hasPermission('access devel information')) {
        // Do what core does in bootstrap.inc and errors.inc.
        // (We need to duplicate the core code here rather than calling it
        // to avoid having the backtrace_error_handler() on top of the call stack.)
        if ($error_level & error_reporting()) {
            $types = drupal_error_levels();
            list($severity_msg, $severity_level) = $types[$error_level];
            $backtrace = debug_backtrace();
            $caller = Error::getLastCaller($backtrace);
            // We treat recoverable errors as fatal.
            _drupal_log_error(array(
                '%type' => isset($types[$error_level]) ? $severity_msg : 'Unknown error',
                '@message' => $message,
                '%function' => $caller['function'],
                '%file' => $caller['file'],
                '%line' => $caller['line'],
                'severity_level' => $severity_level,
                'backtrace' => $backtrace,
            ), $error_level == E_RECOVERABLE_ERROR);
        }
        return;
    }
    // Don't respond to the error if it was suppressed with a '@'
    if (error_reporting() == 0) {
        return;
    }
    // Don't respond to warning caused by ourselves.
    if (preg_match('#Cannot modify header information - headers already sent by \\([^\\)]*[/\\\\]devel[/\\\\]#', $message)) {
        return;
    }
    if ($error_level & error_reporting()) {
        // Only write each distinct NOTICE message once, as repeats do not give any
        // further information and can choke the page output.
        if ($error_level == E_NOTICE) {
            static $written = array();
            if (!empty($written[$line][$filename][$message])) {
                return;
            }
            $written[$line][$filename][$message] = TRUE;
        }
        $types = drupal_error_levels();
        list($severity_msg, $severity_level) = $types[$error_level];
        $backtrace = debug_backtrace();
        $caller = Error::getLastCaller($backtrace);
        $variables = array(
            '%type' => isset($types[$error_level]) ? $severity_msg : 'Unknown error',
            '@message' => $message,
            '%function' => $caller['function'],
            '%file' => $caller['file'],
            '%line' => $caller['line'],
        );
        $msg = t('%type: @message in %function (line %line of %file).', $variables);
        // Show message if error_level is ERROR_REPORTING_DISPLAY_SOME or higher.
        // (This is Drupal's error_level, which is different from $error_level,
        // and we purposely ignore the difference between _SOME and _ALL,
        // see #970688!)
        if (\Drupal::config('system.logging')->get('error_level') != 'hide') {
            $error_handlers = devel_get_handlers();
            if (!empty($error_handlers[DEVEL_ERROR_HANDLER_STANDARD])) {
                drupal_set_message($msg, $severity_level <= RfcLogLevel::NOTICE ? 'error' : 'warning', TRUE);
            }
            if (!empty($error_handlers[DEVEL_ERROR_HANDLER_BACKTRACE_KINT])) {
                print kpr(ddebug_backtrace(TRUE, 1), TRUE, $msg);
            }
            if (!empty($error_handlers[DEVEL_ERROR_HANDLER_BACKTRACE_DPM])) {
                dpm(ddebug_backtrace(TRUE, 1), $msg, 'warning');
            }
        }
        \Drupal::logger('php')->log($severity_level, $msg);
    }
}

/**
 * Implements hook_page_attachments_alter().
 */
function devel_page_attachments_alter(&$page) {
    if (\Drupal::currentUser()->hasPermission('access devel information') && \Drupal::config('devel.settings')->get('page_alter')) {
        dpm($page, 'page');
    }
}

/**
 * Wrapper for DevelDumperManager::dump().
 *
 * Calls the http://www.firephp.org/ fb() function if it is found.
 *
 * @see \Drupal\devel\DevelDumperManager::dump()
 */
function dfb() {
    $args = func_get_args();
    \Drupal::service('devel.dumper')->dump($args, NULL, 'firephp');
}

/**
 * Wrapper for DevelDumperManager::dump().
 *
 * Calls dfb() to output a backtrace.
 *
 * @see \Drupal\devel\DevelDumperManager::dump()
 */
function dfbt($label) {
    \Drupal::service('devel.dumper')->dump(FirePHP::TRACE, $label, 'firephp');
}

/**
 * Wrapper for DevelDumperManager::dump().
 *
 * Wrapper for ChromePHP Class log method.
 *
 * @see \Drupal\devel\DevelDumperManager::dump()
 */
function dcp() {
    $args = func_get_args();
    \Drupal::service('devel.dumper')->dump($args, NULL, 'chromephp');
}
if (!function_exists('dd')) {
    
    /**
     * Wrapper for DevelDumperManager::debug().
     *
     * @deprecated since Drupal 8.6.0 because symfony now has dd() as a function.
     *   Use the ddm() function instead.
     * 
     * @see \Drupal\devel\DevelDumperManager::debug()
     */
    function dd($data, $label = NULL) {
        return \Drupal::service('devel.dumper')->debug($data, $label, 'default');
    }
}
if (!function_exists('ddm')) {
    
    /**
     * Wrapper for DevelDumperManager::debug() to replace previous dd function.
     *
     * @see \Drupal\devel\DevelDumperManager::debug()
     */
    function ddm($data, $label = NULL) {
        return \Drupal::service('devel.dumper')->debug($data, $label, 'default');
    }
}

/**
 * Wrapper for DevelDumperManager::message().
 *
 * Prints a variable to the 'message' area of the page.
 *
 * Uses drupal_set_message().
 *
 * @param $input
 *   An arbitrary value to output.
 * @param string $name
 *   Optional name for identifying the output.
 * @param string $type
 *   Optional message type for drupal_set_message(), defaults to 'status'.
 *
 * @return input
 *   The unaltered input value.
 *
 * @see \Drupal\devel\DevelDumperManager::message()
 */
function dpm($input, $name = NULL, $type = 'status') {
    \Drupal::service('devel.dumper')->message($input, $name, $type);
    return $input;
}

/**
 * Wrapper for DevelDumperManager::message().
 *
 * Displays a Variable::export() variable to the 'message' area of the page.
 *
 * Uses drupal_set_message().
 *
 * @param $input
 *   An arbitrary value to output.
 * @param string $name
 *   Optional name for identifying the output.
 *
 * @return input
 *   The unaltered input value.
 *
 * @see \Drupal\devel\DevelDumperManager::message()
 */
function dvm($input, $name = NULL) {
    \Drupal::service('devel.dumper')->message($input, $name, 'status', 'drupal_variable');
    return $input;
}

/**
 * An alias for dpm(), for historic reasons.
 */
function dsm($input, $name = NULL) {
    return dpm($input, $name);
}

/**
 * Wrapper for DevelDumperManager::dumpOrExport().
 *
 * An alias for the devel.dumper service. Saves carpal tunnel syndrome.
 *
 * @see \Drupal\devel\DevelDumperManager::dumpOrExport()
 */
function dpr($input, $export = FALSE, $name = NULL) {
    return \Drupal::service('devel.dumper')->dumpOrExport($input, $name, $export, 'default');
}

/**
 * Wrapper for DevelDumperManager::dumpOrExport().
 *
 * An alias for devel_dump(). Saves carpal tunnel syndrome.
 *
 * @see \Drupal\devel\DevelDumperManager::dumpOrExport()
 */
function kpr($input, $export = FALSE, $name = NULL) {
    return \Drupal::service('devel.dumper')->dumpOrExport($input, $name, $export);
}

/**
 * Wrapper for DevelDumperManager::dumpOrExport().
 *
 * Like dpr(), but uses Variable::export() instead.
 *
 * @see \Drupal\devel\DevelDumperManager::dumpOrExport()
 */
function dvr($input, $export = FALSE, $name = NULL) {
    return \Drupal::service('devel.dumper')->dumpOrExport($input, $name, $export, 'drupal_variable');
}

/**
 * Prints the arguments passed into the current function.
 */
function dargs($always = TRUE) {
    static $printed;
    if ($always || !$printed) {
        $bt = debug_backtrace();
        print kpr($bt[1]['args'], TRUE);
        $printed = TRUE;
    }
}

/**
 * Prints a SQL string from a DBTNG Select object. Includes quoted arguments.
 *
 * @param object $query
 *   An object that implements the SelectInterface interface.
 * @param boolean $return
 *   Whether to return the string. Default is FALSE, meaning to print it
 *   and return $query instead.
 * @param string $name
 *   Optional name for identifying the output.
 *
 * @return object|string
 *   The $query object, or the query string if $return was TRUE.
 */
function dpq($query, $return = FALSE, $name = NULL) {
    if (\Drupal::currentUser()->hasPermission('access devel information')) {
        if (method_exists($query, 'preExecute')) {
            $query->preExecute();
        }
        $sql = (string) $query;
        $quoted = array();
        $connection = Database::getConnection();
        foreach ((array) $query->arguments() as $key => $val) {
            $quoted[$key] = is_null($val) ? 'NULL' : $connection->quote($val);
        }
        $sql = strtr($sql, $quoted);
        if ($return) {
            return $sql;
        }
        dpm($sql, $name);
    }
    return $return ? NULL : $query;
}

/**
 * Prints a renderable array element to the screen using kprint_r().
 *
 * #pre_render and/or #post_render pass-through callback for kprint_r().
 *
 * @todo Investigate appending to #suffix.
 * @todo Investigate label derived from #id, #title, #name, and #theme.
 */
function devel_render() {
    $args = func_get_args();
    // #pre_render and #post_render pass the rendered $element as last argument.
    kpr(end($args));
    // #pre_render and #post_render expect the first argument to be returned.
    return reset($args);
}

/**
 * Prints the function call stack.
 *
 * @param $return
 *   Pass TRUE to return the formatted backtrace rather than displaying it in
 *   the browser via kprint_r().
 * @param $pop
 *   How many items to pop from the top of the stack; useful when calling from
 *   an error handler.
 * @param $options
 *   Options to pass on to PHP's debug_backtrace().
 *
 * @return string|NULL
 *   The formatted backtrace, if requested, or NULL.
 *
 * @see http://php.net/manual/en/function.debug-backtrace.php
 */
function ddebug_backtrace($return = FALSE, $pop = 0, $options = DEBUG_BACKTRACE_PROVIDE_OBJECT) {
    if (\Drupal::currentUser()->hasPermission('access devel information')) {
        $backtrace = debug_backtrace($options);
        while ($pop-- > 0) {
            array_shift($backtrace);
        }
        $counter = count($backtrace);
        $path = $backtrace[$counter - 1]['file'];
        $path = substr($path, 0, strlen($path) - 10);
        $paths[$path] = strlen($path) + 1;
        $paths[DRUPAL_ROOT] = strlen(DRUPAL_ROOT) + 1;
        $nbsp = " ";
        // Show message if error_level is ERROR_REPORTING_DISPLAY_SOME or higher.
        // (This is Drupal's error_level, which is different from $error_level,
        // and we purposely ignore the difference between _SOME and _ALL,
        // see #970688!)
        if (\Drupal::config('system.logging')->get('error_level') != 'hide') {
            while (!empty($backtrace)) {
                $call = array();
                if (isset($backtrace[0]['file'])) {
                    $call['file'] = $backtrace[0]['file'];
                    foreach ($paths as $path => $len) {
                        if (strpos($backtrace[0]['file'], $path) === 0) {
                            $call['file'] = substr($backtrace[0]['file'], $len);
                        }
                    }
                    $call['file'] .= ':' . $backtrace[0]['line'];
                }
                if (isset($backtrace[1])) {
                    if (isset($backtrace[1]['class'])) {
                        $function = $backtrace[1]['class'] . $backtrace[1]['type'] . $backtrace[1]['function'] . '()';
                    }
                    else {
                        $function = $backtrace[1]['function'] . '()';
                    }
                    $backtrace[1] += array(
                        'args' => array(),
                    );
                    foreach ($backtrace[1]['args'] as $key => $value) {
                        $call['args'][$key] = $value;
                    }
                }
                else {
                    $function = 'main()';
                    $call['args'] = $_GET;
                }
                $nicetrace[($counter <= 10 ? $nbsp : '') . --$counter . ': ' . $function] = $call;
                array_shift($backtrace);
            }
            if ($return) {
                return $nicetrace;
            }
            kpr($nicetrace);
        }
    }
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adds mouse-over hints on the Permissions page to display
 * language-independent machine names and module base names.
 *
 * @see \Drupal\user\Form\UserPermissionsForm::buildForm()
 */
function devel_form_user_admin_permissions_alter(&$form, FormStateInterface $form_state) {
    if (\Drupal::currentUser()->hasPermission('access devel information') && \Drupal::config('devel.settings')->get('raw_names')) {
        foreach (Element::children($form['permissions']) as $key) {
            if (isset($form['permissions'][$key][0])) {
                $form['permissions'][$key][0]['#wrapper_attributes']['title'] = $key;
            }
            elseif (isset($form['permissions'][$key]['description'])) {
                $form['permissions'][$key]['description']['#wrapper_attributes']['title'] = $key;
            }
        }
    }
}

/**
 * Implements hook_form_FORM_ID_alter().
 *
 * Adds mouse-over hints on the Modules page to display module base names.
 *
 * @see \Drupal\system\Form\ModulesListForm::buildForm()
 * @see theme_system_modules_details()
 */
function devel_form_system_modules_alter(&$form, FormStateInterface $form_state) {
    if (\Drupal::currentUser()->hasPermission('access devel information') && \Drupal::config('devel.settings')->get('raw_names', FALSE) && isset($form['modules']) && is_array($form['modules'])) {
        foreach (Element::children($form['modules']) as $group) {
            if (is_array($form['modules'][$group])) {
                foreach (Element::children($form['modules'][$group]) as $key) {
                    if (isset($form['modules'][$group][$key]['name']['#markup'])) {
                        $form['modules'][$group][$key]['name']['#markup'] = '<span title="' . $key . '">' . $form['modules'][$group][$key]['name']['#markup'] . '</span>';
                    }
                }
            }
        }
    }
}

/**
 * Implements hook_query_TAG_alter().
 *
 * Makes debugging entity query much easier.
 *
 * Example usage:
 * @code
 * $query = \Drupal::entityQuery('node');
 * $query->condition('status', NODE_PUBLISHED);
 * $query->addTag('debug');
 * $query->execute();
 * @endcode
 */
function devel_query_debug_alter(AlterableInterface $query) {
    if (!$query->hasTag('debug-semaphore')) {
        $query->addTag('debug-semaphore');
        dpq($query);
    }
}