/**
* This is action to update exchanges from bank in database
* When grab is failed, it goes again $tries_count times after sleeping $seconds_to_sleep seconds
* If it is not helping, last exchange values from database will be inserted
*
* @param string $strategy_classname Classname of strategy
* @param int $tries_count Count of tries if caught exception
* @param int $seconds_to_sleep Seconds to sleep befor new try
*/
public function actionBank($strategy_classname, $tries_count = 5, $seconds_to_sleep = 10)
{
// create grabber
try {
$grabber = new ExchangeRateGrabber(ExchangeRateGrabberStrategyAbstract::create($strategy_classname));
} catch (\Exception $ex) {
echo 'Can\'t create grabber of ' . $strategy_classname . ': ' . trim($ex->getMessage()) . PHP_EOL;
return;
}
// start tries
$try_number = 0;
$today = (new \DateTime())->format('Y-m-d');
do {
try {
$data = $grabber->grab();
// @todo: hide in factory
$exchange = ExchangeRate::find()->where(['bank_id' => $grabber->getBankId(), 'grab_date' => $today])->one();
if (empty($exchange)) {
$exchange = new ExchangeRate();
$exchange->bank_id = $grabber->getBankId();
$exchange->grab_date = $today;
}
$exchange->dollar_buy = $data[Currency::DOLLAR_ID]['buy'];
$exchange->dollar_sale = $data[Currency::DOLLAR_ID]['sale'];
$exchange->euro_buy = $data[Currency::EURO_ID]['buy'];
$exchange->euro_sale = $data[Currency::EURO_ID]['sale'];
} catch (\Exception $ex) {
echo $strategy_classname . ' is having problems: ' . trim($ex->getMessage()) . PHP_EOL;
// if some tries left, let's sleep for a few seconds
if (++$try_number <= $tries_count) {
if (intval($seconds_to_sleep) > 0) {
sleep($seconds_to_sleep);
}
echo "Let's try again. This is try #{$try_number}" . PHP_EOL;
}
}
} while (empty($exchange) && $try_number <= $tries_count);
// get last exchange rates if grabber is not working
if (empty($exchange)) {
// @todo: hide in factory
$last_exchanges = ExchangeRate::find()->where(['bank_id' => $grabber->getBankId()])->orderBy('grab_date DESC')->one();
if ($last_exchanges->grab_date == $today) {
$exchange = $last_exchanges;
} else {
$exchange = new ExchangeRate();
$exchange->attributes = $last_exchanges->attributes;
$exchange->id = null;
$exchange->grab_date = $today;
}
echo "Last exchange rates will be inserted for {$strategy_classname}" . PHP_EOL;
}
echo $strategy_classname . " updated with dollar {$exchange->dollar_buy}/{$exchange->dollar_sale}, euro {$exchange->euro_buy}/{$exchange->euro_sale}" . PHP_EOL;
$exchange->save();
}
/**
* If bankname is null, it can be only child of CommonBankGrabStrategy
*
* {@inheritdoc}
*/
public function __construct($bankname = null)
{
$this->bankname = empty($bankname) ? parent::getBankName() : $bankname;
parent::__construct();
}
