84 lines
3.3 KiB
PHP
84 lines
3.3 KiB
PHP
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<?php
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$config = parse_ini_file(__DIR__ . '/../config/flashii.ini');
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try {
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$pdo = new PDO($config['exrate-dsn'], $config['exrate-user'], $config['exrate-pass'], [
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PDO::ATTR_CASE => PDO::CASE_NATURAL,
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
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PDO::ATTR_STRINGIFY_FETCHES => false,
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PDO::ATTR_EMULATE_PREPARES => false,
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PDO::MYSQL_ATTR_INIT_COMMAND => "
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SET SESSION
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sql_mode = 'STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION',
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time_zone = '+00:00';
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",
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]);
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} catch(PDOException $ex) {
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die((string)$ex);
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}
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define('EXRATE_INTER', 'EUR');
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define('EXRATE_COMMON', [
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'EUR', 'AUD', 'GBP', 'CAD', 'USD', 'JPY', 'PLN', 'SGD', 'RUB', 'ILS',
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]);
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$from = strtoupper((string)filter_input(INPUT_GET, 'from', FILTER_SANITIZE_STRING));
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$to = strtoupper((string)filter_input(INPUT_GET, 'to', FILTER_SANITIZE_STRING));
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$amount = (string)(filter_input(INPUT_GET, 'amount', FILTER_SANITIZE_NUMBER_FLOAT, FILTER_FLAG_ALLOW_FRACTION) ?? '1');
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if((!empty($to) && strlen($to) !== 3) || strlen($from) !== 3) {
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http_response_code(400);
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die('Invalid currency specified.');
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}
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$needsRefresh = $pdo->prepare('SELECT MAX(`rate_stored`) <= NOW() - INTERVAL 1 DAY FROM `exchange-rates` LIMIT 1');
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$needsRefresh = $needsRefresh->execute() ? $needsRefresh->fetchColumn() : 1;
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if($needsRefresh !== 0) {
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$data = json_decode(file_get_contents('https://api.exchangerate.host/latest?base=' . EXRATE_INTER), true);
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if($data !== null) {
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$pdo->exec('TRUNCATE `exchange-rates`;');
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$insertCurrency = $pdo->prepare('REPLACE INTO `exchange-rates` (`rate_from`, `rate_to`, `rate_value`) VALUES (:from, :to, :value)');
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$insertCurrency->bindValue('from', $data['base']);
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foreach($data['rates'] as $currency => $rate) {
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$insertCurrency->bindValue('to', $currency);
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$insertCurrency->bindValue('value', $rate);
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$insertCurrency->execute();
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}
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}
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}
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$result = new stdClass;
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$result->from = $from;
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$result->to = $to;
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$result->amount = (float)$amount;
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if($from === $to) {
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$result->result = $result->amount;
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} else {
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$convertCurrency = $pdo->prepare('SELECT (SELECT (:amount / `rate_value`) FROM `exchange-rates` WHERE `rate_from` = \'' . EXRATE_INTER . '\' AND `rate_to` = :from) * `rate_value` FROM `exchange-rates` WHERE `rate_from` = \'' . EXRATE_INTER . '\' AND `rate_to` = :to;');
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$convertCurrency->bindValue('from', $from);
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$convertCurrency->bindValue('amount', $amount);
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if(empty($to)) {
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$result->results = [];
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foreach(EXRATE_COMMON as $commonCurrency) {
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if($commonCurrency === $from)
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continue;
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$result->results[] = $current = new stdClass;
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$current->to = $commonCurrency;
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$convertCurrency->bindValue('to', $commonCurrency);
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$convertCurrency->execute();
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$current->result = $convertCurrency->fetchColumn() ?? 0;
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}
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} else {
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$convertCurrency->bindValue('to', $to);
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$convertCurrency->execute();
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$result->result = $convertCurrency->fetchColumn() ?? 0;
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}
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}
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http_response_code(200);
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header('Content-Type: application/json');
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echo json_encode($result);
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