/**
* Determine if a user has access to a certain operation within a group context.
*
* For content access @see hook_og_node_access().
*
* @param $op
* The operation name.
* @param $node
* The group or group content node object.
* @param $acting_user
* The user object of the acting user.
* @param $account
* Optional; The account related to the operation.
* @return
* OG_ACCESS_ALLOW - if operation is allowed;
* OG_ACCESS_DENY - if it should be denied;
* OG_ACCESS_IGNORE - if you don't care about this operation.
*/
function hook_og_access($op, $node, $acting_user, $account = NULL)
{
if ($op == 'view') {
// Show group content only if they are in a certain day, defined in the
// group's data. This data is fictional, and it's up to an implementing
// module to implement it.
if (og_is_group_content_type($node->type)) {
// Get the first node group this group content belongs to.
$gids = og_get_object_groups('node', $node);
$group = node_load($gids[0]);
if (!empty($group->data['show day'])) {
$today = date('N');
if ($group->data['show day'] == $today) {
return OG_ACCESS_ALLOW;
} else {
return OG_ACCESS_DENY;
}
} else {
// The group doesn't have a day definition, so we don't care about this
// operation.
return OG_ACCESS_IGNORE;
}
}
}
}
/**
* Helper function to determine if a user has access to score a quiz.
*
* @param $quiz_creator
* uid of the quiz creator.
*
* @return bool
*/
public function quizContextAccessToScore($quiz_creator = NULL)
{
// Must we check this node, or the parent quiz ?
if (!isset($this->checkWhat)) {
if (isset($this->question->nid) && og_is_group_content_type('node', $this->question->type)) {
$groups = og_get_entity_groups('node', $this->node);
if (!empty($groups)) {
$this->checkWhat = 'self';
}
}
// If empty, check the parent quiz.
if (!isset($this->checkWhat)) {
// Try fetching the parent quiz, if any.
$quiz = $this->getParentQuiz();
if (isset($quiz)) {
$this->checkWhat = 'parent';
} else {
// Use default permissions.
$this->checkWhat = 'none';
}
}
}
if ($this->checkWhat != 'none') {
if ($this->checkWhat == 'parent') {
$node = $this->getParentQuiz();
} else {
$node = clone $this->question;
}
if ($quiz_creator == NULL && ($quiz = quiz_get_quiz_from_menu())) {
$quiz_creator = $quiz->uid;
}
if (!($access = og_quiz_ogs_access($node, array('score taken quiz answer', 'score taken quiz answer')))) {
$access = og_quiz_ogs_access($node, 'score own quiz');
if ($access) {
global $user;
$access = $access && $user->uid == $quiz_creator;
}
}
}
return isset($access) ? $access : quiz_access_to_score($quiz_creator);
}
