function api_canvas_parameters_other($app_id, $user)
{
// Add the list of friends and the friends who've added the app
// to the POST we make
$app_info = application_get_info($app_id);
$api_friends = user_get_all_friends($user);
foreach ($api_friends as $k => $friend) {
if (!platform_can_see_app($app_id, $friend, $app_info)) {
unset($api_friends[$k]);
}
}
$csv_api_friends = implode(',', $api_friends);
return array('friends' => $csv_api_friends);
}
public function friends_getAppUsers()
{
$friend_list = user_get_all_friends($this->user_id);
$result = array();
foreach ($friend_list as $friend_id) {
if (platform_app_has_full_permission($this->app_id, $friend_id)) {
$result[] = $friend_id;
}
}
return $result;
}
/**
* Dummy helper function for sample implementation.
* Returns whether or not $id1 and $id2 are friends.
*
* @param $id1 first user
* @param $id2 second user
* @return boolean, true if $id1 and $id2 are friends
*/
function are_friends($id1, $id2)
{
$friends = user_get_all_friends($id1);
return in_array($id2, $friends);
}
/**
* Dummy helper function for sample implementation that fetches
* all rows where $id is one of the friends. The parameter $pos
* indicates whether we are looking for $id to be uid1 or uid2
* ($pos has a value of either 0 or 1), so that the id returned
* is of the correct format.
* Fills in the appropriate field in $result (passed by reference)
*
* Enforces the restriction that you can only request all friends of
* a user if that is the currently logged in user.
*
* @param $id1 first user
* @param $id2 second user
* @return boolean, true if $id1 and $id2 are friends
*/
private function get_all_friends($id, $pos, &$result)
{
if ($this->user != $id) {
throw new NoIndexFunctionException("Can't lookup all friends of {$id}; only for the logged in user(" . $this->user . ") or for pairs of users.");
}
$friend_arr = user_get_all_friends($id);
foreach ($friend_arr as $friend) {
if ($pos == 0) {
$result["{$id}:{$friend}"] = 1;
} else {
$result["{$friend}:{$id}"] = 1;
}
}
}