122 lines
3.6 KiB
PHP
122 lines
3.6 KiB
PHP
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<?php /*
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+--------------------------------------------------------------------+
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| CiviCRM version 4.7 |
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+--------------------------------------------------------------------+
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| Copyright CiviCRM LLC (c) 2004-2017 |
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+--------------------------------------------------------------------+
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| This file is a part of CiviCRM. |
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| CiviCRM is free software; you can copy, modify, and distribute it |
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| under the terms of the GNU Affero General Public License |
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| Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
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| CiviCRM is distributed in the hope that it will be useful, but |
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| WITHOUT ANY WARRANTY; without even the implied warranty of |
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| See the GNU Affero General Public License for more details. |
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| |
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| You should have received a copy of the GNU Affero General Public |
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| License and the CiviCRM Licensing Exception along |
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| with this program; if not, contact CiviCRM LLC |
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| at info[AT]civicrm[DOT]org. If you have questions about the |
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| GNU Affero General Public License or the licensing of CiviCRM, |
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| see the CiviCRM license FAQ at http://civicrm.org/licensing |
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+--------------------------------------------------------------------+
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*/
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/**
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*
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* @package CRM
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* @copyright CiviCRM LLC (c) 2004-2017
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*/
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/**
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* Temporarily change a global variable.
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*
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* @code
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* $globals = CRM_Utils_GlobalStack::singleton();
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* $globals->push(array(
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* '_GET' => array(
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* 'q' => 'some-value
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* ),
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* ));
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* ...do stuff...
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* $globals->pop();
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* @endcode
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*
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* Note: for purposes of this class, we'll refer to the array passed into
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* push() as a frame.
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*/
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class CRM_Utils_GlobalStack {
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/**
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* We don't have a container or dependency-injection, so use singleton instead
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*
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* @var object
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*/
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private static $_singleton = NULL;
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private $backups = array();
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/**
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* Get or set the single instance of CRM_Utils_GlobalStack.
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*
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* @return CRM_Utils_GlobalStack
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*/
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static public function singleton() {
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if (self::$_singleton === NULL) {
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self::$_singleton = new CRM_Utils_GlobalStack();
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}
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return self::$_singleton;
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}
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/**
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* @param $newFrame
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*/
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public function push($newFrame) {
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$this->backups[] = $this->createBackup($newFrame);
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$this->applyFrame($newFrame);
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}
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public function pop() {
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$this->applyFrame(array_pop($this->backups));
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}
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/**
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* @param array $new
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* The new, incoming frame.
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* @return array
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* frame
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*/
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public function createBackup($new) {
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$frame = array();
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foreach ($new as $globalKey => $values) {
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if (is_array($values)) {
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foreach ($values as $key => $value) {
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$frame[$globalKey][$key] = CRM_Utils_Array::value($key, $GLOBALS[$globalKey]);
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}
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}
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else {
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$frame[$globalKey] = CRM_Utils_Array::value($globalKey, $GLOBALS);
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}
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}
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return $frame;
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}
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/**
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* @param $newFrame
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*/
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public function applyFrame($newFrame) {
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foreach ($newFrame as $globalKey => $values) {
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if (is_array($values)) {
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foreach ($values as $key => $value) {
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$GLOBALS[$globalKey][$key] = $value;
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}
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}
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else {
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$GLOBALS[$globalKey] = $values;
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}
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}
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}
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}
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