added basic soap processing classes discussed in #2

src/BeSimple/SoapCommon/SoapKernel.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+use BeSimple\SoapCommon\SoapRequest;
+use BeSimple\SoapCommon\SoapResponse;
+
+use BeSimple\SoapCommon\SoapRequestFilter;
+use BeSimple\SoapCommon\SoapResponseFilter;
+
+/**
+ * SoapKernel provides methods to pre- and post-process SoapRequests and SoapResponses using
+ * chains of SoapRequestFilter and SoapResponseFilter objects (roughly following 
+ * the chain-of-responsibility pattern).
+ * 
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+class SoapKernel
+{
+    private $requestFilters = array();
+    private $responseFilters = array();
+    
+    /**
+     * Registers the given object either as filter for SoapRequests or as filter for SoapResponses 
+     * or as filter for both depending on the implemented interfaces. Inner filters have to be registered
+     * before outer filters. This means the order is as follows: RequestFilter2->RequestFilter1 and 
+     * ResponseFilter1->ResponseFilter2.
+     * 
+     * TODO: add priority mechanism to ensure correct order of filters
+     * 
+     * @param SoapRequestFilter|SoapResponseFilter $filter
+     */
+    public function registerFilter($filter)
+    {   
+        if($filter instanceof SoapRequestFilter)
+        {
+            array_unshift($this->requestFilters, $filter);
+        }
+        
+        if($filter instanceof SoapResponseFilter)
+        {
+            array_push($this->responseFilters, $filter);
+        }
+    }
+    
+    /**
+     * Applies all registered SoapRequestFilter to the given SoapRequest. 
+     * 
+     * @param SoapRequest $request
+     */
+    public function filterRequest(SoapRequest $request)
+    {
+        foreach($this->requestFilters as $filter)
+        {
+            $filter->filterRequest($request);
+        }
+    }
+    
+    /**
+     * Applies all registered SoapResponseFilter to the given SoapResponse. 
+     * 
+     * @param SoapResponse $response
+     */
+    public function filterResponse(SoapResponse $response)
+    {
+        foreach($this->responseFilters as $filter)
+        {
+            $filter->filterRequest($response);
+        }
+    }
+}

src/BeSimple/SoapCommon/SoapMessage.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+/**
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+abstract class SoapMessage
+{
+    const CONTENT_TYPE_HEADER = 'CONTENT_TYPE';
+    const ACTION_HEADER = 'HTTP_SOAPACTION';
+    
+    static protected $versionToContentTypeMap = array(
+        SOAP_1_1 => 'text/xml; charset=%s',
+        SOAP_1_2 => 'application/soap+xml; charset=%s'
+    );
+    
+    static public function getContentTypeForVersion($version, $encoding = 'utf-8')
+    {
+        if(!in_array($soapVersion, array(SOAP_1_1, SOAP_1_2)))
+        {
+            throw new \InvalidArgumentException("The 'version' argument has to be either 'SOAP_1_1' or 'SOAP_1_2'!");
+        }
+        
+        return sprintf(self::$versionToContentTypeMap[$version], $encoding);
+    }
+    
+    protected $contentType;
+    protected $content;
+    
+    protected $contentDomDocument = null;
+    
+    protected $version;
+    protected $action;
+
+    public function getContentType()
+    {
+        return $this->contentType;
+    }
+    
+    public function setContentType($contentType)
+    {
+        $this->contentType = $contentType;
+    }
+    
+    public function getContent()
+    {
+        return $this->content;
+    }
+    
+    public function setContent($content)
+    {
+        $this->content = $content;
+    }
+    
+    public function getContentDocument()
+    {
+        if(null === $this->contentDomDocument)
+        {
+            $this->contentDomDocument = new \DOMDocument();
+            $this->contentDomDocument->loadXML($this->content);
+        }
+        
+        return $this->contentDomDocument;
+    }
+    
+    public function getVersion()
+    {
+        return $this->version;
+    }
+    
+    public function setVersion($version)
+    {
+        $this->version = $version;
+    }
+    
+    public function getAction()
+    {
+        return $this->action;
+    }
+    
+    public function setAction($action)
+    {
+        $this->action = $action;
+    }
+}

src/BeSimple/SoapCommon/SoapRequest.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+use BeSimple\SoapCommon\SoapMessage;
+
+/**
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+class SoapRequest extends SoapMessage
+{
+    
+}

src/BeSimple/SoapCommon/SoapRequestFilter.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+use BeSimple\SoapCommon\SoapRequest;
+
+/**
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+interface SoapRequestFilter
+{
+    public function filterRequest(SoapRequest $request);
+}

src/BeSimple/SoapCommon/SoapResponse.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+use BeSimple\SoapCommon\SoapMessage;
+
+/**
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+class SoapResponse extends SoapMessage
+{
+    
+}

src/BeSimple/SoapCommon/SoapResponseFilter.php

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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapCommon.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ * (c) Andreas Schamberger <mail@andreass.net>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapCommon;
+
+use BeSimple\SoapCommon\SoapResponse;
+
+/**
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+interface SoapResponseFilter
+{
+    public function filterResponse(SoapResponse $response);
+}