group.php

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<?php
function get_group_entity_as_row($guid) {
    global $CONFIG;

    $guid = (int)$guid;

    return get_data_row("SELECT * from {$CONFIG->dbprefix}groups_entity where guid=$guid");
}

function add_group_tool_option($name, $label, $default_on = true) {
    global $CONFIG;

    if (!isset($CONFIG->group_tool_options)) {
        $CONFIG->group_tool_options = array();
    }

    $group_tool_option = new \stdClass;

    $group_tool_option->name = $name;
    $group_tool_option->label = $label;
    $group_tool_option->default_on = $default_on;

    $CONFIG->group_tool_options[] = $group_tool_option;
}

function remove_group_tool_option($name) {
    global $CONFIG;

    if (!isset($CONFIG->group_tool_options)) {
        return;
    }

    foreach ($CONFIG->group_tool_options as $i => $option) {
        if ($option->name == $name) {
            unset($CONFIG->group_tool_options[$i]);
        }
    }
}

function _elgg_groups_container_override($hook, $type, $result, $params) {
    $container = $params['container'];
    $user = $params['user'];
    if (elgg_instanceof($container, 'group') && $user) {
        /* @var \ElggGroup $container */
        if ($container->isMember($user)) {
            return true;
        }
    }

    return $result;
}

function _elgg_groups_test($hook, $type, $value) {
    global $CONFIG;
    $value[] = $CONFIG->path . 'engine/tests/ElggGroupTest.php';
    return $value;
}

function _elgg_groups_init() {
    elgg_register_plugin_hook_handler('container_permissions_check', 'all', '_elgg_groups_container_override');
    elgg_register_plugin_hook_handler('unit_test', 'system', '_elgg_groups_test');
}

return function(\Elgg\EventsService $events, \Elgg\HooksRegistrationService $hooks) {
    $events->registerHandler('init', 'system', '_elgg_groups_init');
};