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<?php |
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/* |
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* This file is part of the Exchange Rate package, an RunOpenCode project. |
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* |
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* Implementation of exchange rate crawler for National Bank of Serbia, http://www.nbs.rs. |
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* |
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* (c) 2017 RunOpenCode |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace RunOpenCode\ExchangeRate\NationalBankOfSerbia\Parser; |
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use RunOpenCode\ExchangeRate\Contract\RateInterface; |
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use RunOpenCode\ExchangeRate\Model\Rate; |
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use RunOpenCode\ExchangeRate\NationalBankOfSerbia\Api; |
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use RunOpenCode\ExchangeRate\NationalBankOfSerbia\Enum\RateType; |
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use RunOpenCode\ExchangeRate\NationalBankOfSerbia\Exception\RuntimeException; |
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use RunOpenCode\Sax\Handler\AbstractSaxHandler; |
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/** |
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* Class XmlParser |
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* |
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* Parse XML document with daily rates from National Bank of Serbia. |
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* |
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* @package RunOpenCode\ExchangeRate\NationalBankOfSerbia\Parser |
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*/ |
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class XmlParser extends AbstractSaxHandler |
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{ |
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/** |
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* @var RateInterface[] |
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*/ |
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private $rates; |
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/** |
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* @var \SplStack |
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*/ |
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private $stack; |
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/** |
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* @var array |
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*/ |
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private $currentRate; |
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/** |
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* @var \DateTime |
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*/ |
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private $date; |
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/** |
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* @var string |
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*/ |
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private $rateType; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function onDocumentStart($parser, $stream) |
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{ |
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$this->rates = array(); |
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$this->stack = new \SplStack(); |
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$this->currentRate = array(); |
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$this->date = new \DateTime('now'); |
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$this->rateType = RateType::MEDIAN; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function onElementStart($parser, $name, $attributes) |
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{ |
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$this->stack->push($name); |
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if ($name === 'ITEM') { |
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$this->currentRate = array(); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function onElementData($parser, $data) |
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{ |
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if (!empty($data)) { |
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switch ($this->stack->top()) { |
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case 'DATE': |
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$this->date = \DateTime::createFromFormat('d.m.Y', $data); |
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break; |
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case 'TYPE': |
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$data = trim($data); |
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if ($data === 'FOREIGN EXCHANGE') { |
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$this->rateType = 'foreign_exchange'; |
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} elseif ($data === 'FOREIGN CASH') { |
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$this->rateType = 'foreign_cash'; |
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} |
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break; |
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case 'CURRENCY': |
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$this->currentRate['currencyCode'] = trim($data); |
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break; |
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case 'UNIT': |
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$this->currentRate['unit'] = (int) trim($data); |
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break; |
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case 'BUYING_RATE': |
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$this->currentRate['buyingRate'] = (float) trim($data); |
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break; |
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case 'SELLING_RATE': |
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$this->currentRate['sellingRate'] = (float) trim($data); |
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break; |
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case 'MIDDLE_RATE': |
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$this->currentRate['middleRate'] = (float) trim($data); |
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break; |
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} |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function onElementEnd($parser, $name) |
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{ |
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$this->stack->pop(); |
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$buildRate = function ($value, $currencyCode, $rateType, $date) { |
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return new Rate(Api::NAME, $value, $currencyCode, $rateType, $date, 'RSD', new \DateTime('now'), new \DateTime('now')); |
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}; |
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if ($name === 'ITEM') { |
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if (array_key_exists('buyingRate', $this->currentRate)) { |
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$this->rates[] = $buildRate( |
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$this->currentRate['buyingRate'] / $this->currentRate['unit'], |
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$this->currentRate['currencyCode'], |
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$this->rateType.'_buying', |
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$this->date |
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); |
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} |
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if (array_key_exists('sellingRate', $this->currentRate)) { |
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$this->rates[] = $buildRate( |
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$this->currentRate['sellingRate'] / $this->currentRate['unit'], |
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$this->currentRate['currencyCode'], |
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$this->rateType.'_selling', |
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$this->date |
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); |
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} |
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if (array_key_exists('middleRate', $this->currentRate)) { |
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$this->rates[] = $buildRate( |
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$this->currentRate['middleRate'] / $this->currentRate['unit'], |
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$this->currentRate['currencyCode'], |
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RateType::MEDIAN, |
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$this->date |
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); |
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} |
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$this->currentRate = array(); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function onDocumentEnd($parser, $stream) |
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{ |
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// noop |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @throws \RuntimeException |
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*/ |
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protected function onParseError($message, $code, $lineno) |
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{ |
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throw new RuntimeException(sprintf('Unable to parse XML source from National Bank of Serbia, reason: "%s", lineno: "%s".', $message, $lineno), $code); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function getResult() |
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{ |
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return $this->rates; |
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} |
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} |
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RunOpenCode /
exchange-rate-nbs
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.