Yapeal\Xsl\Transformer

Complexity

Total Complexity

12

Size/Duplication

Total Lines	145
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	5

Importance

Changes	15
Bugs	4	Features	4

4 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
B	transformEveApi()	0	29	3
A	addYapealProcessingInstructionToXml()	0	23	3
B	performTransform()	0	37	5

<?php
/**
 * Contains Transformer class.
 *
 * PHP version 5.5
 *
 * LICENSE:
 * This file is part of Yet Another Php Eve Api Library also know as Yapeal
 * which can be used to access the Eve Online API data and place it into a
 * database.
 * Copyright (C) 2015-2016 Michael Cummings
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * You should be able to find a copy of this license in the LICENSE.md file. A
 * copy of the GNU GPL should also be available in the GNU-GPL.md file.
 *
 * @copyright 2015-2016 Michael Cummings
 * @license   http://www.gnu.org/copyleft/lesser.html GNU LGPL
 * @author    Michael Cummings <mgcummings@yahoo.com>
 */
namespace Yapeal\Xsl;

use DOMDocument;
use SimpleXMLElement;
use tidy;
use XSLTProcessor;
use Yapeal\Event\EveApiEventEmitterTrait;
use Yapeal\Event\EveApiEventInterface;
use Yapeal\Event\MediatorInterface;
use Yapeal\FileSystem\RelativeFileSearchTrait;
use Yapeal\Log\Logger;
use Yapeal\Xml\EveApiReadWriteInterface;

/**
 * Class Transformer
 */
class Transformer implements TransformerInterface
{
    use EveApiEventEmitterTrait, RelativeFileSearchTrait;
    /**
     * Transformer Constructor.
     *
     * @param string $dir Base directory where Eve API XSL files can be found.
     */
    public function __construct($dir = __DIR__)
    {
        $this->setRelativeBaseDir($dir . '/');
    }
    /**
     * @param EveApiEventInterface $event
     * @param string               $eventName
     * @param MediatorInterface    $yem
     *
     * @return EveApiEventInterface
     * @throws \DomainException
     * @throws \InvalidArgumentException
     * @throws \LogicException
     */
    public function transformEveApi(EveApiEventInterface $event, $eventName, MediatorInterface $yem)
    {
        $this->setYem($yem);
        $data = $event->getData();
        $this->getYem()
            ->triggerLogEvent(
                'Yapeal.Log.log',
                Logger::DEBUG,
                $this->getReceivedEventMessage($data, $eventName, __CLASS__)
            );
        $fileName = $this->findEveApiFile($data->getEveApiSectionName(), $data->getEveApiName(), 'xsl');
        if ('' === $fileName) {
            return $event;
        }
        $xml = $this->addYapealProcessingInstructionToXml($data)
            ->performTransform($fileName, $data);
        if (false === $xml) {
            $mess = 'Failed to transform xml during';
            $yem->triggerLogEvent(
                'Yapeal.Log.log',
                Logger::WARNING,
                $this->createEventMessage($mess, $data, $eventName)
            );
            return $event;
        }
        $xml = (new tidy())->repairString($xml, $this->tidyConfig, 'utf8');
        return $event->setData($data->setEveApiXml($xml))
            ->eventHandled();
    }
    /**
     * Adds Processing Instruction to XML containing json encoding of any post used during retrieve.
     *
     * NOTE: This use to be done directly in the network retriever but felt modifying the XML like that belonged in
     * transform instead.
     *
     * @param EveApiReadWriteInterface $data
     *
     * @return self Fluent interface.
     * @throws \InvalidArgumentException
     */
    protected function addYapealProcessingInstructionToXml(EveApiReadWriteInterface $data)
    {
        $xml = $data->getEveApiXml();
        if (false === $xml) {
            return $this;
        }
        $arguments = $data->getEveApiArguments();
        if (!empty($arguments['vCode'])) {
            $arguments['vCode'] = substr($arguments['vCode'], 0, 8) . '...';
        }
        unset($arguments['mask']);
        $json = json_encode($arguments);
        $xml = str_replace(
            ["encoding='UTF-8'?>\r\n<eveapi", "encoding='UTF-8'?>\n<eveapi"],
            [
                "encoding='UTF-8'?>\r\n<?yapeal.parameters.json " . $json . "?>\r\n<eveapi",
                "encoding='UTF-8'?>\n<?yapeal.parameters.json " . $json . "?>\n<eveapi"
            ],
            $xml
        );
        $data->setEveApiXml($xml);
        return $this;
    }
    /**
     * @param string                   $fileName
     * @param EveApiReadWriteInterface $data
     *
     * @return false|string
     * @throws \DomainException
     * @throws \InvalidArgumentException
     * @throws \LogicException
     */
    protected function performTransform($fileName, EveApiReadWriteInterface $data)
    {
        $xslt = new XSLTProcessor();
        $oldErrors = libxml_use_internal_errors(true);
        libxml_clear_errors();
        $dom = new DOMDocument();
        $dom->load($fileName);
        $xslt->importStylesheet($dom);
        $result = false;
        try {
            $result = $xslt->transformToXml(new SimpleXMLElement($data->getEveApiXml()));
        } catch (\Exception $exc) {
            $mess = 'XML cause SimpleXMLElement exception in';
            $this->getYem()
                ->triggerLogEvent(
                    'Yapeal.log.log',
                    Logger::WARNING,
                    $this->createEveApiMessage($mess, $data),
                    ['exception' => $exc]
                );
        }
        if (false === $result) {
            /**
             * @type array $errors
             */
            $errors = libxml_get_errors();
            if (0 !== count($errors)) {
                foreach ($errors as $error) {
                    $this->getYem()
                        ->triggerLogEvent('Yapeal.Log.log', Logger::NOTICE, $error->message);
                }
            }
        }
        libxml_clear_errors();
        libxml_use_internal_errors($oldErrors);
        return $result;
    }
    /**
     * Holds tidy config settings.
     *
     * @type array $tidyConfig
     */
    protected $tidyConfig = [
        'indent'        => true,
        'indent-spaces' => 4,
        'input-xml'     => true,
        'newline'       => 'LF',
        'output-xml'    => true,
        'wrap'          => '1000'
    ];
}