/**
* Check if a user can answer a question
*
* @param ElggQuestion $question the question that needs answer
* @param ElggUser $user the user askting the question (default: current user)
*
* @return bool
*/
function questions_can_answer_question(ElggQuestion $question, ElggUser $user = null)
{
static $general_experts_only;
// default to page owner
if (!$question instanceof ElggQuestion) {
return false;
}
// default to current user
if (!$user instanceof ElggUser) {
$user = elgg_get_logged_in_user_entity();
}
if (empty($user)) {
// not logged in
return false;
}
$container = $question->getContainerEntity();
if (!questions_experts_enabled()) {
return questions_can_ask_question($container, $user);
}
// get plugin setting
if (!isset($general_experts_only)) {
$general_experts_only = questions_experts_only_answer();
}
$is_expert = questions_is_expert($container, $user);
// check general setting
if ($general_experts_only && !$is_expert) {
return false;
}
if (!$container instanceof ElggGroup) {
return true;
}
// check group settings
$group_experts_only = false;
if ($container->getPrivateSetting('questions_who_can_answer') === 'experts') {
$group_experts_only = true;
}
if ($group_experts_only && !$is_expert) {
return false;
}
// are you a group member or can you edit the group
return $container->isMember($user) || $container->canEdit($user->getGUID());
}
if ($show_group_selector && elgg_is_active_plugin('groups')) {
$group_options = ['type' => 'group', 'limit' => false, 'metadata_name_value_pairs' => ['name' => 'questions_enable', 'value' => 'yes'], 'joins' => ['JOIN ' . elgg_get_config('dbprefix') . 'groups_entity ge ON e.guid = ge.guid'], 'order_by' => 'ge.name ASC'];
if (!$editing) {
$owner = elgg_get_logged_in_user_entity();
$group_options['relationship'] = 'member';
$group_options['relationship_guid'] = elgg_get_logged_in_user_guid();
} else {
$owner = $question->getOwnerEntity();
}
// group selector
$groups = new ElggBatch('elgg_get_entities_from_relationship', $group_options);
// build group optgroup
$group_optgroup = [];
foreach ($groups as $group) {
// can questions be asked in this group
if (!questions_can_ask_question($group)) {
continue;
}
$selected = ['value' => $group->getGUID()];
if ($group->getGUID() == $question->getContainerGUID()) {
$selected['selected'] = true;
}
$group_optgroup[] = elgg_format_element('option', $selected, $group->name);
}
if (!empty($group_optgroup)) {
$container_options = true;
$select_options = [];
// add user to the list
$selected = ['value' => ''];
if ($owner->getGUID() == $question->getContainerGUID()) {
$selected['selected'] = true;
$adding = !$question->getGUID();
$editing = !$adding;
$moving = false;
if ($editing && !$question->canEdit()) {
register_error(elgg_echo('actionunauthorized'));
forward(REFERER);
}
$container_guid = (int) get_input('container_guid');
if (empty($container_guid)) {
$container_guid = (int) $question->getOwnerGUID();
}
if ($editing && $container_guid != $question->getContainerGUID()) {
$moving = true;
}
$container = get_entity($container_guid);
if ($adding && !questions_can_ask_question($container)) {
register_error(elgg_echo('questions:action:question:save:error:container'));
forward(REFERER);
}
if (questions_limited_to_groups() && $container_guid == $question->getOwnerGUID()) {
register_error(elgg_echo('questions:action:question:save:error:limited_to_groups'));
forward(REFERER);
}
$title = get_input('title');
$description = get_input('description');
$tags = string_to_tag_array(get_input('tags', ''));
$access_id = (int) get_input('access_id');
$comments_enabled = get_input('comments_enabled');
if (empty($container_guid) || empty($title)) {
register_error(elgg_echo('questions:action:question:save:error:body', [$container_guid, $title]));
forward(REFERER);
