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<?php
/**
 * @package modx
 * @subpackage processors.security.group.context
 */
if (!$modx->hasPermission('access_permissions')) return $modx->error->failure($modx->lexicon('permission_denied'));
$modx->lexicon->load('access','user','context');

/* check for acl */
if (empty($scriptProperties['id'])) return $modx->error->failure($modx->lexicon('acl_err_ns'));
$acl = $modx->getObject('modAccessContext',$scriptProperties['id']);
if (empty($acl)) return $modx->error->failure($modx->lexicon('acl_err_nf'));

/* validate for empty fields */
if (!isset($scriptProperties['principal'])) $modx->error->addField('principal',$modx->lexicon('usergroup_err_ns'));
if (empty($scriptProperties['target'])) $modx->error->addField('target',$modx->lexicon('context_err_ns'));
if (empty($scriptProperties['policy'])) $modx->error->addField('policy',$modx->lexicon('access_policy_err_ns'));
if (!isset($scriptProperties['authority'])) $modx->error->addField('authority',$modx->lexicon('authority_err_ns'));

if ($modx->error->hasError()) return $modx->error->failure();

/* validate for invalid data */
$context = $modx->getObject('modContext',$scriptProperties['target']);
if (empty($context)) $modx->error->addField('target',$modx->lexicon('context_err_nf'));

$policy = $modx->getObject('modAccessPolicy',$scriptProperties['policy']);
if (empty($policy)) $modx->error->addField('policy',$modx->lexicon('access_policy_err_nf'));

$alreadyExists = $modx->getObject('modAccessContext',array(
    'principal' => $scriptProperties['principal'],
    'principal_class' => 'modUserGroup',
    'target' => $scriptProperties['target'],
    'policy' => $scriptProperties['policy'],
    'id:!=' => $scriptProperties['id'],
));
if ($alreadyExists) $modx->error->addField('context',$modx->lexicon('access_context_err_ae'));

if ($modx->error->hasError()) return $modx->error->failure();

/* update object */
$acl->fromArray($scriptProperties);
if ($acl->save() == false) {
    return $modx->error->failure($modx->lexicon('access_context_err_save'));
}

return $modx->error->success('',$acl);