Sibyx/phpGPX

<?php
/**
 * Created            16/02/2017 16:32
 * @author            Jakub Dubec <jakub.dubec@gmail.com>
 */

namespace phpGPX\Parsers\Extensions;

use phpGPX\Models\Extensions\TrackPointExtension;
use phpGPX\Parsers\ExtensionParser;

class TrackPointExtensionParser
{
    private static $attributeMapper = [
        'atemp' => [
            'name' => 'aTemp',
            'type' => 'float'
        ],
        'wtemp' => [
            'name' => 'wTemp',
            'type' => 'float'
        ],
        'depth' => [
            'name' => 'depth',
            'type' => 'float'
        ],
        'hr' => [
            'name' => 'hr',
            'type' => 'float'
        ],
        'cad' => [
            'name' => 'cad',
            'type' => 'float'
        ],
        'speed' => [
            'name' => 'speed',
            'type' => 'float'
        ],
        'course' => [
            'name' => 'course',
            'type' => 'int'
        ],
        'bearing' => [
            'name' => 'bearing',
            'type' => 'int'
        ]
    ];

    /**
     * @param \SimpleXMLElement $node
     * @return TrackPointExtension
     */
    public static function parse($node)
    {
        $extension = new TrackPointExtension();

        foreach (self::$attributeMapper as $key => $attribute) {
            $extension->{$attribute['name']} = isset($node->$key) ? $node->$key : null;
            if (!is_null($extension->{$attribute['name']})) {
                settype($extension->{$attribute['name']}, $attribute['type']);
            }

            // Remove in v1.0
            if ($key == 'hr') {
                $extension->heartRate = $extension->hr;
            }

            // Remove in v1.0
            if ($key == 'cad') {
                $extension->cadence = $extension->cad;
            }

            // Remove in v1.0
            if ($key == 'atemp') {
                $extension->avgTemperature = $extension->aTemp;
            }
        }

        return $extension;
    }

    /**
     * @param TrackPointExtension $extension
     * @param \DOMDocument $document
     * @return \DOMElement
     */
    public static function toXML(TrackPointExtension $extension, \DOMDocument &$document)
    {
        $node =  $document->createElement("gpxtpx:TrackPointExtension");

        ExtensionParser::$usedNamespaces[TrackPointExtension::EXTENSION_NAME] = [
            'namespace' => TrackPointExtension::EXTENSION_NAMESPACE,
            'xsd' => TrackPointExtension::EXTENSION_NAMESPACE_XSD,
            'name' => TrackPointExtension::EXTENSION_NAME,
            'prefix' => TrackPointExtension::EXTENSION_NAMESPACE_PREFIX
        ];

        foreach (self::$attributeMapper as $key => $attribute) {
            if (!is_null($extension->{$attribute['name']})) {
                $child = $document->createElement(
                    sprintf("%s:%s", TrackPointExtension::EXTENSION_NAMESPACE_PREFIX, $key),
                    $extension->{$attribute['name']}
                );
                $node->appendChild($child);
            }
        }

        return $node;
    }
}