my changes

app/Library/Xml/Strategy.php

@@ -0,0 +1,232 @@
+<?php
+namespace App\Library\Xml;
+
+use App\Dataset;
+use DOMDocument;
+
+/**
+ * Strategy short summary.
+ *
+ * Strategy description.
+ *
+ * @version 1.0
+ * @author kaiarn
+ */
+class Strategy
+{
+    /**
+     * Holds current configuration.
+     *
+     * @var Conf
+     */
+    private $_config;
+
+    /**
+     * Holds current representation version.
+     *
+     * @var double
+     */
+    protected $_version = null;
+
+
+    /**
+     * Initiate class with a valid config object.
+     */
+    public function __construct()
+    {
+        $this->_version = 1.0;
+        $this->_config = new Conf();
+    }
+
+    /**
+     * (non-PHPdoc)
+     * see library/Opus/Model/Xml/Opus_Model_Xml_Strategy#setDomDocument()
+     */
+    public function setup(Conf $conf)
+    {
+        $this->_config = $conf;
+    }
+
+    /**
+     * If a model has been set this method generates and returnes
+     * DOM representation of it.
+     *
+     * @throws \Exception Thrown if no Model is given.
+     * @return \DOMDocument DOM representation of the current Model.
+     */
+    public function getDomDocument()
+    {
+        if (null === $this->_config->model) {
+            throw new \Exception('No Model given for serialization.');
+        }
+        $this->_config->dom = new DOMDocument('1.0', 'UTF-8');
+        $root = $this->_config->dom->createElement('Opus');
+        $root->setAttribute('version', $this->getVersion());
+        $this->_config->dom->appendChild($root);
+        $root->setAttribute('xmlns:xlink', 'http://www.w3.org/1999/xlink');
+
+        $this->_mapModel($this->_config->model, $this->_config->dom, $root);
+
+        return $this->_config->dom;
+    }
+
+    protected function _mapModel(Dataset $model, \DOMDocument $dom, \DOMNode $rootNode)
+    {
+        $fields = $model->describe();
+        $excludeFields = $this->getConfig()->excludeFields;
+        if (count($excludeFields) > 0) {
+            $fieldsDiff = array_diff($fields, $excludeFields);
+        } else {
+            $fieldsDiff = $fields;
+        }
+
+        $childNode = $this->createModelNode($dom, $model);
+        $rootNode->appendChild($childNode);
+
+        foreach ($fieldsDiff as $fieldname) {
+            $field = $model->getField($fieldname);
+            $this->_mapField($field, $dom, $childNode);
+        }
+    }
+
+    protected function _mapField(Field $field, DOMDocument $dom, \DOMNode $rootNode)
+    {
+        $modelClass = $field->getValueModelClass();
+        $fieldValues = $field->getValue();
+
+        if (true === $this->getConfig()->excludeEmpty) {
+            if (true === is_null($fieldValues)
+                or (is_string($fieldValues) && trim($fieldValues) == '')
+                or (is_array($fieldValues) && empty($fieldValues))) {
+                return;
+            }
+        }
+
+        if (null === $modelClass) {
+            $this->mapSimpleField($dom, $rootNode, $field);
+        } else {
+            $fieldName = $field->getName();
+
+            if (!is_array($fieldValues)) {
+                $fieldValues = array($fieldValues);
+            }
+
+            foreach ($fieldValues as $value) {
+                $childNode = $this->createFieldElement($dom, $fieldName);
+                //$childNode->setAttribute("Value",  $value);
+                $rootNode->appendChild($childNode);
+
+                
+                // if a field has no value then is nothing more to do
+                // TODO maybe must be there an other solution
+                // FIXME remove code duplication (duplicates Opus_Model_Xml_Version*)
+                if (is_null($value)) {
+                    continue;
+                }
+
+                if ($value instanceof \Illuminate\Database\Eloquent\Model) {
+                    $this->_mapModelAttributes($value, $dom, $childNode);
+                } elseif ($value instanceof \Carbon\Carbon) {
+                    $this->_mapDateAttributes($value, $dom, $childNode);
+                } elseif (is_array($value)) {
+                    $this->_mapArrayAttributes($value, $dom, $childNode);
+                }
+            }
+        }
+    }
+
+    public function mapSimpleField(DOMDocument $dom, \DOMNode $rootNode, Field $field)
+    {
+        $fieldName = $field->getName();
+        $fieldValues = $this->getFieldValues($field);
+
+        // Replace invalid XML-1.0-Characters by UTF-8 replacement character.
+        $fieldValues = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/', "\xEF\xBF\xBD ", $fieldValues);
+        $rootNode->setAttribute($fieldName, $fieldValues);
+    }
+
+    protected function createFieldElement(DOMDocument $dom, $fieldName)
+    {
+        return $dom->createElement($fieldName);
+    }
+
+    protected function _mapDateAttributes(\Carbon\Carbon $model, DOMDocument $dom, \DOMNode $rootNode)
+    {
+        $rootNode->setAttribute("Year", $model->year);
+        $rootNode->setAttribute("Month", $model->month);
+        $rootNode->setAttribute("Day", $model->day);
+        $rootNode->setAttribute("Hour", $model->hour);
+        $rootNode->setAttribute("Minute", $model->minute);
+        $rootNode->setAttribute("Second", $model->second);
+        $rootNode->setAttribute("UnixTimestamp", $model->timestamp);
+        $rootNode->setAttribute("Timezone", $model->tzName);
+    }
+
+    protected function _mapArrayAttributes(array $attributes, DOMDocument $dom, \DOMNode $rootNode)
+    {
+        //$attributes = array_keys($model->getAttributes());
+        foreach ($attributes as $property_name => $value) {
+            $fieldName = $property_name;
+            $field = new Field($fieldName);
+            $fieldval = $value;
+            $field->setValue($fieldval);
+            $this->_mapField($field, $dom, $rootNode);
+        }
+    }
+
+    protected function _mapModelAttributes(\Illuminate\Database\Eloquent\Model $model, DOMDocument $dom, \DOMNode $rootNode)
+    {
+        $attributes = array_keys($model->getAttributes());
+        foreach ($attributes as $property_name) {
+            $fieldName = self::convertColumnToFieldname($property_name);
+            $field = new Field($fieldName);
+            $fieldval = $model->{$property_name};
+            $field->setValue($fieldval);
+            $this->_mapField($field, $dom, $rootNode);
+        }
+    }
+
+    //snakeToCamel
+    public static function convertColumnToFieldname($columnname)
+    {
+        //return lcfirst(str_replace(' ', '', ucwords(str_replace('_', ' ', $columnname))));
+        return str_replace(' ', '', ucwords(str_replace(['-', '_'], ' ', $columnname)));
+    }
+
+    public function getFieldValues($field)
+    {
+        $fieldValues = $field->getValue();
+
+        // workaround for simple fields with multiple values
+        if (true === $field->hasMultipleValues()) {
+            $fieldValues = implode(',', $fieldValues);
+        }
+        //if ($fieldValues instanceOf DateTimeZone) {
+        //    $fieldValues = $fieldValues->getName();
+        //}
+
+        return trim($fieldValues);
+    }
+
+
+    protected function createModelNode(DOMDocument $dom, Dataset $model)
+    {
+        $classname = "Rdr_" . substr(strrchr(get_class($model), '\\'), 1);
+        return $dom->createElement($classname);
+    }
+
+    /**
+     * Return version value of current xml representation.
+     *
+     * @see library/Opus/Model/Xml/Opus_Model_Xml_Strategy#getVersion()
+     */
+    public function getVersion()
+    {
+        return floor($this->_version);
+    }
+
+    public function getConfig()
+    {
+        return $this->_config;
+    }
+}