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Eddy Prosperi
2024-12-17 17:34:10 +01:00
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libraries/fof40/Html/FEFHelper/BrowseView.php Normal file
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<?php
/**
* @package FOF
* @copyright Copyright (c)2010-2022 Nicholas K. Dionysopoulos / Akeeba Ltd
* @license GNU General Public License version 3, or later
*/
namespace FOF40\Html\FEFHelper;
defined('_JEXEC') || die;
use FOF40\Container\Container;
use FOF40\Html\SelectOptions;
use FOF40\Model\DataModel;
use FOF40\Utils\ArrayHelper;
use FOF40\View\DataView\DataViewInterface;
use FOF40\View\View;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Language\Text;
/**
* An HTML helper for Browse views.
*
* It reintroduces a FEF-friendly of some of the functionality found in FOF 3's Header and Field classes. These
* helpers are also accessible through Blade, making the transition from XML forms to Blade templates easier.
*
* @since 3.3.0
*/
abstract class BrowseView
{
/**
* Caches the results of getOptionsFromModel keyed by a hash. The hash is computed by the model
* name, the model state and the options passed to getOptionsFromModel.
*
* @var array
*/
private static $cacheModelOptions = [];
/**
* Get the translation key for a field's label
*
* @param string $fieldName The field name
*
* @return string
*
* @since 3.3.0
*/
public static function fieldLabelKey(string $fieldName): string
{
$view = self::getViewFromBacktrace();
try
{
$inflector = $view->getContainer()->inflector;
$viewName = $inflector->singularize($view->getName());
$altViewName = $inflector->pluralize($view->getName());
$componentName = $view->getContainer()->componentName;
$keys = [
strtoupper($componentName . '_' . $viewName . '_FIELD_' . $fieldName),
strtoupper($componentName . '_' . $altViewName . '_FIELD_' . $fieldName),
strtoupper($componentName . '_' . $viewName . '_' . $fieldName),
strtoupper($componentName . '_' . $altViewName . '_' . $fieldName),
];
foreach ($keys as $key)
{
if (Text::_($key) !== $key)
{
return $key;
}
}
return $keys[0];
}
catch (\Exception $e)
{
return ucfirst($fieldName);
}
}
/**
* Returns the label for a field (translated)
*
* @param string $fieldName The field name
*
* @return string
*/
public static function fieldLabel(string $fieldName): string
{
return Text::_(self::fieldLabelKey($fieldName));
}
/**
* Return a table field header which sorts the table by that field upon clicking
*
* @param string $field The name of the field
* @param string|null $langKey (optional) The language key for the header to be displayed
*
* @return string
*/
public static function sortgrid(string $field, ?string $langKey = null): string
{
/** @var DataViewInterface $view */
$view = self::getViewFromBacktrace();
if (is_null($langKey))
{
$langKey = self::fieldLabelKey($field);
}
return HTMLHelper::_('FEFHelp.browse.sort', $langKey, $field, $view->getLists()->order_Dir, $view->getLists()->order, $view->getTask());
}
/**
* Create a browse view filter from values returned by a model
*
* @param string $localField Field name
* @param string $modelTitleField Foreign model field for drop-down display values
* @param null $modelName Foreign model name
* @param string $placeholder Placeholder for no selection
* @param array $params Generic select display parameters
*
* @return string
*
* @since 3.3.0
*/
public static function modelFilter(string $localField, string $modelTitleField = 'title', ?string $modelName = null,
?string $placeholder = null, array $params = []): string
{
/** @var DataModel $model */
$model = self::getViewFromBacktrace()->getModel();
if (empty($modelName))
{
$modelName = $model->getForeignModelNameFor($localField);
}
if (is_null($placeholder))
{
$placeholder = self::fieldLabelKey($localField);
}
$params = array_merge([
'list.none' => '&mdash; ' . Text::_($placeholder) . ' &mdash;',
'value_field' => $modelTitleField,
'fof.autosubmit' => true,
], $params);
return self::modelSelect($localField, $modelName, $model->getState($localField), $params);
}
/**
* Display a text filter (search box)
*
* @param string $localField The name of the model field. Used when getting the filter state.
* @param string $searchField The INPUT element's name. Default: "filter_$localField".
* @param string $placeholder The Text language key for the placeholder. Default: extrapolate from $localField.
* @param array $attributes HTML attributes for the INPUT element.
*
* @return string
*
* @since 3.3.0
*/
public static function searchFilter(string $localField, ?string $searchField = null, ?string $placeholder = null,
array $attributes = []): string
{
/** @var DataModel $model */
$view = self::getViewFromBacktrace();
$model = $view->getModel();
$searchField = empty($searchField) ? $localField : $searchField;
$placeholder = empty($placeholder) ? self::fieldLabelKey($localField) : $placeholder;
$attributes['type'] = $attributes['type'] ?? 'text';
$attributes['name'] = $searchField;
$attributes['id'] = !isset($attributes['id']) ? "filter_$localField" : $attributes['id'];
$attributes['placeholder'] = !isset($attributes['placeholder']) ? $view->escape(Text::_($placeholder)) : $attributes['placeholder'];
$attributes['title'] = $attributes['title'] ?? $attributes['placeholder'];
$attributes['value'] = $view->escape($model->getState($localField));
if (!isset($attributes['onchange']))
{
$attributes['class'] = trim(($attributes['class'] ?? '') . ' akeebaCommonEventsOnChangeSubmit');
$attributes['data-akeebasubmittarget'] = $attributes['data-akeebasubmittarget'] ?? 'adminForm';
}
// Remove null attributes and collapse into a string
$attributes = array_filter($attributes, function ($v) {
return !is_null($v);
});
$attributes = ArrayHelper::toString($attributes);
return "<input $attributes />";
}
/**
* Create a browse view filter with dropdown values
*
* @param string $localField Field name
* @param array $options The HTMLHelper options list to use
* @param string $placeholder Placeholder for no selection
* @param array $params Generic select display parameters
*
* @return string
*
* @since 3.3.0
*/
public static function selectFilter(string $localField, array $options, ?string $placeholder = null,
array $params = []): string
{
/** @var DataModel $model */
$model = self::getViewFromBacktrace()->getModel();
if (is_null($placeholder))
{
$placeholder = self::fieldLabelKey($localField);
}
$params = array_merge([
'list.none' => '&mdash; ' . Text::_($placeholder) . ' &mdash;',
'fof.autosubmit' => true,
], $params);
return self::genericSelect($localField, $options, $model->getState($localField), $params);
}
/**
* View access dropdown filter
*
* @param string $localField Field name
* @param string $placeholder Placeholder for no selection
* @param array $params Generic select display parameters
*
* @return string
*
* @since 3.3.0
*/
public static function accessFilter(string $localField, ?string $placeholder = null, array $params = []): string
{
return self::selectFilter($localField, SelectOptions::getOptions('access', $params), $placeholder, $params);
}
/**
* Published state dropdown filter
*
* @param string $localField Field name
* @param string $placeholder Placeholder for no selection
* @param array $params Generic select display parameters
*
* @return string
*
* @since 3.3.0
*/
public static function publishedFilter(string $localField, ?string $placeholder = null, array $params = []): string
{
return self::selectFilter($localField, SelectOptions::getOptions('published', $params), $placeholder, $params);
}
/**
* Create a select box from the values returned by a model
*
* @param string $name Field name
* @param string $modelName The name of the model, e.g. "items" or "com_foobar.items"
* @param mixed $currentValue The currently selected value
* @param array $params Passed to optionsFromModel and genericSelect
* @param array $modelState Optional state variables to pass to the model
* @param array $options Any HTMLHelper select options you want to add in front of the model's returned
* values
*
* @return string
*
* @see self::getOptionsFromModel
* @see self::getOptionsFromSource
* @see self::genericSelect
*
* @since 3.3.0
*/
public static function modelSelect(string $name, string $modelName, $currentValue, array $params = [],
array $modelState = [], array $options = []): string
{
$params = array_merge([
'fof.autosubmit' => true,
], $params);
$options = self::getOptionsFromModel($modelName, $params, $modelState, $options);
return self::genericSelect($name, $options, $currentValue, $params);
}
/**
* Get a (human readable) title from a (typically numeric, foreign key) key value using the data
* returned by a DataModel.
*
* @param string $value The key value
* @param string $modelName The name of the model, e.g. "items" or "com_foobar.items"
* @param array $params Passed to getOptionsFromModel
* @param array $modelState Optional state variables to pass to the model
* @param array $options Any HTMLHelper select options you want to add in front of the model's returned
* values
*
* @return string
*
* @see self::getOptionsFromModel
* @see self::getOptionsFromSource
* @see self::genericSelect
*
* @since 3.3.0
*/
public static function modelOptionName(string $value, ?string $modelName = null, array $params = [],
array $modelState = [], array $options = []): ?string
{
if (!isset($params['cache']))
{
$params['cache'] = true;
}
if (!isset($params['none_as_zero']))
{
$params['none_as_zero'] = true;
}
$options = self::getOptionsFromModel($modelName, $params, $modelState, $options);
return self::getOptionName($value, $options);
}
/**
* Gets the active option's label given an array of HTMLHelper options
*
* @param mixed $selected The currently selected value
* @param array $data The HTMLHelper options to parse
* @param string $optKey Key name, default: value
* @param string $optText Value name, default: text
* @param bool $selectFirst Should I automatically select the first option? Default: true
*
* @return mixed The label of the currently selected option
*/
public static function getOptionName($selected, array $data, string $optKey = 'value', string $optText = 'text', bool $selectFirst = true): ?string
{
$ret = null;
foreach ($data as $elementKey => &$element)
{
if (is_array($element))
{
$key = $optKey === null ? $elementKey : $element[$optKey];
$text = $element[$optText];
}
elseif (is_object($element))
{
$key = $optKey === null ? $elementKey : $element->$optKey;
$text = $element->$optText;
}
else
{
// This is a simple associative array
$key = $elementKey;
$text = $element;
}
if (is_null($ret) && $selectFirst && ($selected == $key))
{
$ret = $text;
}
elseif ($selected == $key)
{
$ret = $text;
}
}
return $ret;
}
/**
* Create a generic select list based on a bunch of options. Option sources will be merged into the provided
* options automatically.
*
* Parameters:
* - format.depth The current indent depth.
* - format.eol The end of line string, default is linefeed.
* - format.indent The string to use for indentation, default is tab.
* - groups If set, looks for keys with the value "<optgroup>" and synthesizes groups from them. Deprecated.
* Default: true.
* - list.select Either the value of one selected option or an array of selected options. Default: $currentValue.
* - list.translate If true, text and labels are translated via Text::_(). Default is false.
* - list.attr HTML element attributes (key/value array or string)
* - list.none Placeholder for no selection (creates an option with an empty string key)
* - option.id The property in each option array to use as the selection id attribute. Defaults: null.
* - option.key The property in each option array to use as the Default: "value". If set to null, the index of the
* option array is used.
* - option.label The property in each option array to use as the selection label attribute. Default: null
* - option.text The property in each option array to use as the displayed text. Default: "text". If set to null,
* the option array is assumed to be a list of displayable scalars.
* - option.attr The property in each option array to use for additional selection attributes. Defaults: null.
* - option.disable: The property that will hold the disabled state. Defaults to "disable".
* - fof.autosubmit Should I auto-submit the form on change? Default: true
* - fof.formname Form to auto-submit. Default: adminForm
* - class CSS class to apply
* - size Size attribute for the input
* - multiple Is this a multiple select? Default: false.
* - required Is this a required field? Default: false.
* - autofocus Should I focus this field automatically? Default: false
* - disabled Is this a disabled field? Default: false
* - readonly Render as a readonly field with hidden inputs? Overrides 'disabled'. Default: false
* - onchange Custom onchange handler. Overrides fof.autosubmit. Default: NULL (use fof.autosubmit).
*
* @param string $name
* @param array $options
* @param mixed $currentValue
* @param array $params
*
* @return string
*
* @since 3.3.0
*/
public static function genericSelect(string $name, array $options, $currentValue, array $params = []): string
{
$params = array_merge([
'format.depth' => 0,
'format.eol' => "\n",
'format.indent' => "\t",
'groups' => true,
'list.select' => $currentValue,
'list.translate' => false,
'option.id' => null,
'option.key' => 'value',
'option.label' => null,
'option.text' => 'text',
'option.attr' => null,
'option.disable' => 'disable',
'list.attr' => '',
'list.none' => '',
'id' => null,
'fof.autosubmit' => true,
'fof.formname' => 'adminForm',
'class' => '',
'size' => '',
'multiple' => false,
'required' => false,
'autofocus' => false,
'disabled' => false,
'onchange' => null,
'readonly' => false,
], $params);
$currentValue = $params['list.select'];
$classes = $params['class'] ?? '';
$classes = is_array($classes) ? implode(' ', $classes) : $classes;
// If fof.autosubmit is enabled and onchange is not set we will add our own handler
if ($params['fof.autosubmit'] && is_null($params['onchange']))
{
$formName = $params['fof.formname'] ?: 'adminForm';
$classes .= ' akeebaCommonEventsOnChangeSubmit';
$params['data-akeebasubmittarget'] = $formName;
}
// Construct SELECT element's attributes
$attr = [
'class' => trim($classes) ?: null,
'size' => ($params['size'] ?? null) ?: null,
'multiple' => ($params['multiple'] ?? null) ?: null,
'required' => ($params['required'] ?? false) ?: null,
'aria-required' => ($params['required'] ?? false) ? 'true' : null,
'autofocus' => ($params['autofocus'] ?? false) ?: null,
'disabled' => (($params['disabled'] ?? false) || ($params['readonly'] ?? false)) ?: null,
'onchange' => $params['onchange'] ?? null,
];
$attr = array_filter($attr, function ($x) {
return !is_null($x);
});
// We merge the constructed SELECT element's attributes with the 'list.attr' array, if it was provided
$params['list.attr'] = array_merge($attr, (($params['list.attr'] ?? []) ?: []));
// Merge the options with those fetched from a source (e.g. another Helper object)
$options = array_merge($options, self::getOptionsFromSource($params));
if (!empty($params['list.none']))
{
array_unshift($options, HTMLHelper::_('FEFHelp.select.option', '', Text::_($params['list.none'])));
}
$html = [];
// Create a read-only list (no name) with hidden input(s) to store the value(s).
if ($params['readonly'])
{
$html[] = HTMLHelper::_('FEFHelp.select.genericlist', $options, $name, $params);
// E.g. form field type tag sends $this->value as array
if ($params['multiple'] && is_array($currentValue))
{
if (count($currentValue) === 0)
{
$currentValue[] = '';
}
foreach ($currentValue as $value)
{
$html[] = '<input type="hidden" name="' . $name . '" value="' . htmlspecialchars($value, ENT_COMPAT, 'UTF-8') . '"/>';
}
}
else
{
$html[] = '<input type="hidden" name="' . $name . '" value="' . htmlspecialchars($value, ENT_COMPAT, 'UTF-8') . '"/>';
}
}
else
// Create a regular list.
{
$html[] = HTMLHelper::_('FEFHelp.select.genericlist', $options, $name, $params);
}
return implode($html);
}
/**
* Replace tags that reference fields with their values
*
* @param string $text Text to process
* @param DataModel $item The DataModel instance to get values from
*
* @return string Text with tags replace
*
* @since 3.3.0
*/
public static function parseFieldTags(string $text, DataModel $item): string
{
$ret = $text;
if (empty($item))
{
return $ret;
}
/**
* Replace [ITEM:ID] in the URL with the item's key value (usually: the auto-incrementing numeric ID)
*/
$replace = $item->getId();
$ret = str_replace('[ITEM:ID]', $replace, $ret);
// Replace the [ITEMID] in the URL with the current Itemid parameter
$ret = str_replace('[ITEMID]', $item->getContainer()->input->getInt('Itemid', 0), $ret);
// Replace the [TOKEN] in the URL with the Joomla! form token
$ret = str_replace('[TOKEN]', $item->getContainer()->platform->getToken(true), $ret);
// Replace other field variables in the URL
$data = $item->getData();
foreach ($data as $field => $value)
{
// Skip non-processable values
if (is_array($value) || is_object($value))
{
continue;
}
$search = '[ITEM:' . strtoupper($field) . ']';
$ret = str_replace($search, $value, $ret);
}
return $ret;
}
/**
* Get the FOF View from the backtrace of the static call. MAGIC!
*
* @return View
*
* @since 3.3.0
*/
public static function getViewFromBacktrace(): View
{
// In case we are on a brain-dead host
if (!function_exists('debug_backtrace'))
{
throw new \RuntimeException("Your host has disabled the <code>debug_backtrace</code> PHP function. Please ask them to re-enable it. It's required for running this software.");
}
/**
* For performance reasons I look into the last 4 call stack entries. If I don't find a container I
* will expand my search by another 2 entries and so on until I either find a container or I stop
* finding new call stack entries.
*/
$lastNumberOfEntries = 0;
$limit = 4;
$skip = 0;
$container = null;
while (true)
{
$backtrace = debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT, $limit);
if (count($backtrace) === $lastNumberOfEntries)
{
throw new \RuntimeException(__METHOD__ . ": Cannot retrieve FOF View from call stack. You are either calling me from a non-FEF extension or your PHP is broken.");
}
$lastNumberOfEntries = count($backtrace);
if ($skip)
{
$backtrace = array_slice($backtrace, $skip);
}
foreach ($backtrace as $bt)
{
if (!isset($bt['object']))
{
continue;
}
if ($bt['object'] instanceof View)
{
return $bt['object'];
}
}
$skip = $limit;
$limit += 2;
}
}
/**
* Get HTMLHelper options from an alternate source, e.g. a helper. This is useful for adding arbitrary options
* which are either dynamic or you do not want to inline to your view, e.g. reusable options across
* different views.
*
* The attribs can be:
* source_file The file to load. You can use FOF's URIs such as 'admin:com_foobar/foo/bar'
* source_class The class to use
* source_method The static method to use on source_class
* source_key Use * if you're returning a key/value array. Otherwise the array key for the key (ID)
* value.
* source_value Use * if you're returning a key/value array. Otherwise the array key for the displayed
* value. source_translate Should I pass the value field through Text? Default: true source_format Set
* to "optionsobject" if you're returning an array of HTMLHelper options. Ignored otherwise.
*
* @param array $attribs
*
* @return array
*
* @since 3.3.0
*/
private static function getOptionsFromSource(array $attribs = []): array
{
$options = [];
$container = self::getContainerFromBacktrace();
$attribs = array_merge([
'source_file' => '',
'source_class' => '',
'source_method' => '',
'source_key' => '*',
'source_value' => '*',
'source_translate' => true,
'source_format' => '',
], $attribs);
$source_file = $attribs['source_file'];
$source_class = $attribs['source_class'];
$source_method = $attribs['source_method'];
$source_key = $attribs['source_key'];
$source_value = $attribs['source_value'];
$source_translate = $attribs['source_translate'];
$source_format = $attribs['source_format'];
if ($source_class && $source_method)
{
// Maybe we have to load a file?
if (!empty($source_file))
{
$source_file = $container->template->parsePath($source_file, true);
if ($container->filesystem->fileExists($source_file))
{
include $source_file;
}
}
// Make sure the class exists
// ...and so does the option
if (class_exists($source_class, true) && in_array($source_method, get_class_methods($source_class)))
{
// Get the data from the class
if ($source_format == 'optionsobject')
{
$options = array_merge($options, $source_class::$source_method());
}
else
{
$source_data = $source_class::$source_method();
// Loop through the data and prime the $options array
foreach ($source_data as $k => $v)
{
$key = (empty($source_key) || ($source_key == '*')) ? $k : @$v[$source_key];
$value = (empty($source_value) || ($source_value == '*')) ? $v : @$v[$source_value];
if ($source_translate)
{
$value = Text::_($value);
}
$options[] = HTMLHelper::_('FEFHelp.select.option', $key, $value, 'value', 'text');
}
}
}
}
reset($options);
return $options;
}
/**
* Get HTMLHelper options from the values returned by a model.
*
* The params can be:
* key_field The model field used for the OPTION's key. Default: the model's ID field.
* value_field The model field used for the OPTION's displayed value. You must provide it.
* apply_access Should I apply Joomla ACLs to the model? Default: FALSE.
* none Placeholder for no selection. Default: NULL (no placeholder).
* none_as_zero When true, the 'none' placeholder applies to values '' **AND** '0' (empty string and zero)
* translate Should I pass the values through Text? Default: TRUE.
* with Array of relation names for eager loading.
* cache Cache the results for faster reuse
*
* @param string $modelName The name of the model, e.g. "items" or "com_foobar.items"
* @param array $params Parameters which define which options to get from the model
* @param array $modelState Optional state variables to pass to the model
* @param array $options Any HTMLHelper select options you want to add in front of the model's returned
* values
*
* @return mixed
*
* @since 3.3.0
*/
private static function getOptionsFromModel(string $modelName, array $params = [], array $modelState = [],
array $options = []): array
{
// Let's find the FOF DI container from the call stack
$container = self::getContainerFromBacktrace();
// Explode model name into component name and prefix
$componentName = $container->componentName;
$mName = $modelName;
if (strpos($modelName, '.') !== false)
{
[$componentName, $mName] = explode('.', $mName, 2);
}
if ($componentName !== $container->componentName)
{
$container = Container::getInstance($componentName);
}
/** @var DataModel $model */
$model = $container->factory->model($mName)->setIgnoreRequest(true)->savestate(false);
$defaultParams = [
'key_field' => $model->getKeyName(),
'value_field' => 'title',
'apply_access' => false,
'none' => null,
'none_as_zero' => false,
'translate' => true,
'with' => [],
];
$params = array_merge($defaultParams, $params);
$cache = isset($params['cache']) && $params['cache'];
$cacheKey = null;
if ($cache)
{
$cacheKey = sha1(print_r([
$model->getContainer()->componentName,
$model->getName(),
$params['key_field'],
$params['value_field'],
$params['apply_access'],
$params['none'],
$params['translate'],
$params['with'],
$modelState,
], true));
}
if ($cache && isset(self::$cacheModelOptions[$cacheKey]))
{
return self::$cacheModelOptions[$cacheKey];
}
if (empty($params['none']) && !is_null($params['none']))
{
$langKey = strtoupper($model->getContainer()->componentName . '_TITLE_' . $model->getName());
$placeholder = Text::_($langKey);
if ($langKey !== $placeholder)
{
$params['none'] = '&mdash; ' . $placeholder . ' &mdash;';
}
}
if (!empty($params['none']))
{
$options[] = HTMLHelper::_('FEFHelp.select.option', null, Text::_($params['none']));
if ($params['none_as_zero'])
{
$options[] = HTMLHelper::_('FEFHelp.select.option', 0, Text::_($params['none']));
}
}
if ($params['apply_access'])
{
$model->applyAccessFiltering();
}
if (!is_null($params['with']))
{
$model->with($params['with']);
}
// Set the model's state, if applicable
foreach ($modelState as $stateKey => $stateValue)
{
$model->setState($stateKey, $stateValue);
}
// Set the query and get the result list.
$items = $model->get(true);
foreach ($items as $item)
{
$value = $item->{$params['value_field']};
if ($params['translate'])
{
$value = Text::_($value);
}
$options[] = HTMLHelper::_('FEFHelp.select.option', $item->{$params['key_field']}, $value);
}
if ($cache)
{
self::$cacheModelOptions[$cacheKey] = $options;
}
return $options;
}
/**
* Get the FOF DI container from the backtrace of the static call. MAGIC!
*
* @return Container
*
* @since 3.3.0
*/
private static function getContainerFromBacktrace(): Container
{
// In case we are on a brain-dead host
if (!function_exists('debug_backtrace'))
{
throw new \RuntimeException("Your host has disabled the <code>debug_backtrace</code> PHP function. Please ask them to re-enable it. It's required for running this software.");
}
/**
* For performance reasons I look into the last 4 call stack entries. If I don't find a container I
* will expand my search by another 2 entries and so on until I either find a container or I stop
* finding new call stack entries.
*/
$lastNumberOfEntries = 0;
$limit = 4;
$skip = 0;
$container = null;
while (true)
{
$backtrace = debug_backtrace(DEBUG_BACKTRACE_PROVIDE_OBJECT, $limit);
if (count($backtrace) === $lastNumberOfEntries)
{
throw new \RuntimeException(__METHOD__ . ": Cannot retrieve FOF container from call stack. You are either calling me from a non-FEF extension or your PHP is broken.");
}
$lastNumberOfEntries = count($backtrace);
if ($skip !== 0)
{
$backtrace = array_slice($backtrace, $skip);
}
foreach ($backtrace as $bt)
{
if (!isset($bt['object']))
{
continue;
}
if (!method_exists($bt['object'], 'getContainer'))
{
continue;
}
return $bt['object']->getContainer();
}
$skip = $limit;
$limit += 2;
}
}
}