/**
* Initialize a mysqli connector using the credentials stored in SECRETS_FILE
*
* @uses initSecrets() If $secrets is not already initialized
*
* @return mysqli A valid mysqli connector to the database backing the CanvasAPIviaLTI instance
*
* @throws CanvasAPIviaLTI_Exception MYSQL_CONNECTION if a mysqli connection cannot be established
**/
function initMySql()
{
global $secrets;
// FIXME grown-ups don't program like this
if (!$secrets instanceof SimpleXMLElement) {
$secrets = initSecrets();
}
/* turn off warnings, since we're going to test the connection ourselves */
set_error_handler(function () {
});
$sql = new mysqli((string) $secrets->mysql->host, (string) $secrets->mysql->username, (string) $secrets->mysql->password, (string) $secrets->mysql->database);
restore_error_handler();
if ($sql->connect_error) {
throw new CanvasAPIviaLTI_Exception($sql->connect_error, CanvasAPIviaLTI_Exception::MYSQL_CONNECTION);
}
return $sql;
}
/* test if we already have a working install... */
if ($ready && !isset($_REQUEST['step'])) {
$smarty->addMessage('App already installed', 'It appears that the application has already been installed and is ready for
use.');
/* ...otherwise, let's start with the SECRETS_FILE */
} else {
if (!file_exists(SECRETS_FILE)) {
if (isset($_REQUEST['step']) && $_REQUEST['step'] == CanvasAPIviaLTI_Installer::SECRETS_ENTERED_STEP) {
CanvasAPIviaLTI_Installer::createSecretsFile(CanvasAPIviaLTI_Installer::SECRETS_ENTERED_STEP);
} else {
CanvasAPIviaLTI_Installer::createSecretsFile();
}
}
}
/* establish our database connection */
$secrets = initSecrets();
$sql = initMySql();
try {
if (!isset($_REQUEST['step'])) {
/* load all of our various schema into the database... */
CanvasAPIviaLTI_Installer::createLTIDatabaseTables();
CanvasAPIviaLTI_Installer::createAppDatabaseTables();
/* ...and initialize the app metadata... */
$metadata = CanvasAPIviaLTI_Installer::createAppMetadata();
/* ...optionally, acquire an API token for the app */
CanvasAPIviaLTI_Installer::acquireAPIToken(CanvasAPIviaLTI_Installer::API_DECISION_NEEDED_STEP);
} else {
$metadata = new AppMetadata($sql, $secrets->app->id);
$skip = isset($_REQUEST['skip']) ? $_REQUEST['skip'] : false;
CanvasAPIviaLTI_Installer::acquireAPIToken($_REQUEST['step'], $skip);
}
