contents.php

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<?php

// capture global state necessary for menus
$state = [
    'contexts' => elgg_get_context_stack(),
    'input' => elgg_get_config('input'),
    'page_owner_guid' => elgg_get_page_owner_guid(),
];

// g = guid, pog = page_owner_guid, c = contexts, m = mac
$guid = (int) get_input('g', 0, false);
$page_owner_guid = (int) get_input('pog', 0, false);
$contexts = (array) get_input('c', [], false);
$mac = get_input('m', '', false);
$input = (array) get_input('i', [], false);

// verify MAC
$data = serialize([$guid, $page_owner_guid, $contexts, $input]);

if (!elgg_build_hmac($data)->matchesToken($mac)) {
    return;
}

$user = get_user($guid);
if (!$user instanceof \ElggUser) {
    return;
}

// render view using state as it was in the placeholder view
elgg_set_context_stack($contexts);
elgg_set_config('input', $input);
elgg_set_page_owner_guid($page_owner_guid);

$menu = elgg_view_menu('user_hover', [
    'entity' => $user,
    'username' => $user->username,
    'name' => $user->getDisplayName(),
]);

// wrapping in a li as it is inject into a ul via javascript
echo elgg_format_element('li', [], $menu);

// revert global state
elgg_set_context_stack($state['contexts']);
elgg_set_config('input', $state['input']);
elgg_set_page_owner_guid($state['page_owner_guid']);