--- /dev/null
+<?php
+// Own namespace
+namespace Org\Mxchange\CoreFramework\Template\Engine\Xml;
+
+// Import framework stuff
+use Org\Mxchange\CoreFramework\Bootstrap\FrameworkBootstrap;
+use Org\Mxchange\CoreFramework\Factory\ObjectFactory;
+use Org\Mxchange\CoreFramework\Factory\Template\XmlTemplateEngineFactory;
+use Org\Mxchange\CoreFramework\Registry\GenericRegistry;
+use Org\Mxchange\CoreFramework\Template\CompileableTemplate;
+use Org\Mxchange\CoreFramework\Template\Engine\BaseTemplateEngine;
+use Org\Mxchange\CoreFramework\Traits\Stacker\StackableTrait;
+use Org\Mxchange\CoreFramework\Utils\String\StringUtils;
+
+// Import SPL stuff
+use \InvalidArgumentException;
+
+/**
+ * A generic XML template engine class
+ *
+ * @author Roland Haeder <webmaster@shipsimu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2018 Hub Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.shipsimu.org
+ * @todo This template engine does not make use of setTemplateType()
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+abstract class BaseXmlTemplateEngine extends BaseTemplateEngine {
+ // Load traits
+ use StackableTrait;
+
+ /**
+ * Main nodes in the XML tree
+ */
+ private $mainNodes = [];
+
+ /**
+ * Sub nodes in the XML tree
+ */
+ private $subNodes = [];
+
+ /**
+ * Current main node
+ */
+ private $curr = [];
+
+ /**
+ * XML template type
+ */
+ private $xmlTemplateType = 'xml';
+
+ /**
+ * Type prefix
+ */
+ private $typePrefix = 'xml';
+
+ /**
+ * Name of stacker
+ */
+ private $stackerName = '';
+
+ /**
+ * Content from dependency
+ */
+ protected $dependencyContent = [];
+
+ /**
+ * Template engine instance
+ */
+ private $templateInstance = NULL;
+
+ /**
+ * Protected constructor
+ *
+ * @param $className Name of the class
+ * @return void
+ */
+ protected function __construct (string $className) {
+ // Call parent constructor
+ parent::__construct($className);
+ }
+
+ /**
+ * Does a generic initialization of the template engine
+ *
+ * @param $typePrefix Type prefix
+ * @param $xmlTemplateType Type of XML template
+ * @return $templateInstance An instance of TemplateEngine
+ * @throws BasePathIsEmptyException If the provided $templateBasePath is empty
+ * @throws InvalidBasePathStringException If $templateBasePath is no string
+ * @throws BasePathIsNoDirectoryException If $templateBasePath is no
+ * directory or not found
+ * @throws BasePathReadProtectedException If $templateBasePath is
+ * read-protected
+ */
+ protected function initXmlTemplateEngine (string $typePrefix, string $xmlTemplateType) {
+ // Set XML template type and prefix
+ $this->xmlTemplateType = $xmlTemplateType;
+ $this->typePrefix = $typePrefix;
+
+ // Get template instance
+ $applicationInstance = GenericRegistry::getRegistry()->getInstance('application');
+
+ // Determine base path
+ $templateBasePath = FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('application_base_path') . FrameworkBootstrap::getRequestInstance()->getRequestElement('app') . '/';
+
+ // Is the base path valid?
+ if (empty($templateBasePath)) {
+ // Base path is empty
+ throw new BasePathIsEmptyException($this, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
+ } elseif (!is_string($templateBasePath)) {
+ // Is not a string
+ throw new InvalidBasePathStringException(array($this, $templateBasePath), self::EXCEPTION_INVALID_STRING);
+ } elseif (!is_dir($templateBasePath)) {
+ // Is not a path
+ throw new BasePathIsNoDirectoryException(array($this, $templateBasePath), self::EXCEPTION_INVALID_PATH_NAME);
+ } elseif (!is_readable($templateBasePath)) {
+ // Is not readable
+ throw new BasePathReadProtectedException(array($this, $templateBasePath), self::EXCEPTION_READ_PROTECED_PATH);
+ }
+
+ // Set the base path
+ $this->setTemplateBasePath($templateBasePath);
+
+ // Set template extensions
+ $this->setRawTemplateExtension(FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('raw_template_extension'));
+ $this->setCodeTemplateExtension(FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($typePrefix . '_message_template_extension'));
+
+ // Absolute output path for compiled templates
+ $this->setCompileOutputPath(sprintf('%s%s',
+ $templateBasePath,
+ FrameworkBootstrap::getConfigurationInstance()->getConfigEntry('compile_output_path')
+ ));
+
+ // Init a variable stacker
+ $stackInstance = ObjectFactory::createObjectByConfiguredName($typePrefix . '_' . $xmlTemplateType . '_stacker_class');
+
+ // Set name
+ $this->stackerName = $typePrefix . '_' . $xmlTemplateType;
+
+ // Init stacker
+ $stackInstance->initStack($this->stackerName);
+
+ // Set it
+ $this->setStackInstance($stackInstance);
+
+ // Set it in main nodes
+ array_push($this->mainNodes, str_replace('_', '-', $xmlTemplateType));
+ }
+
+ /**
+ * Load a specified XML template into the engine
+ *
+ * @param $templateName Optional name of template
+ * @return void
+ */
+ public function loadXmlTemplate (string $templateName = '') {
+ // Is the template name empty?
+ if (empty($templateName)) {
+ // Set generic template name
+ $templateName = $this->typePrefix . '_' . $this->xmlTemplateType . '_template_type';
+ } // END - if
+
+ // Set template type
+ $this->setTemplateType(FrameworkBootstrap::getConfigurationInstance()->getConfigEntry($templateName));
+
+ // Load the special template
+ $this->loadTemplate($this->xmlTemplateType);
+ }
+
+ /**
+ * Getter for current main node
+ *
+ * @return $currMainNode Current main node
+ */
+ public final function getCurrMainNode () {
+ return $this->curr['main_node'];
+ }
+
+ /**
+ * Setter for current main node
+ *
+ * @param $element Element name to set as current main node
+ * @return $currMainNode Current main node
+ */
+ private final function setCurrMainNode ($element) {
+ $this->curr['main_node'] = (string) $element;
+ }
+
+ /**
+ * Getter for main node array
+ *
+ * @return $mainNodes Array with valid main node names
+ */
+ public final function getMainNodes () {
+ return $this->mainNodes;
+ }
+
+ /**
+ * Getter for stacker name
+ *
+ * @return $stackerName Name of stacker of this class
+ */
+ protected final function getStackerName () {
+ return $this->stackerName;
+ }
+
+ /**
+ * Setter for sub node array
+ *
+ * @param $subNodes Array with valid sub node names
+ * @return void
+ */
+ public final function setSubNodes (array $subNodes) {
+ $this->subNodes = $subNodes;
+ }
+
+ /**
+ * Getter for sub node array
+ *
+ * @return $subNodes Array with valid sub node names
+ */
+ public final function getSubNodes () {
+ return $this->subNodes;
+ }
+
+ /**
+ * Setter for template engine instances
+ *
+ * @param $templateInstance An instance of a template engine class
+ * @return void
+ */
+ protected final function setTemplateInstance (CompileableTemplate $templateInstance) {
+ $this->templateInstance = $templateInstance;
+ }
+
+ /**
+ * Getter for template engine instances
+ *
+ * @return $templateInstance An instance of a template engine class
+ */
+ protected final function getTemplateInstance () {
+ return $this->templateInstance;
+ }
+
+ /**
+ * Read XML variables by calling readVariable() with 'general' as
+ * variable stack.
+ *
+ * @param $key Key to read from
+ * @return $value Value from variable
+ */
+ public function readXmlData (string $key) {
+ // Is key parameter valid?
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-XML-TEMPLATE-ENGINE: key=%s - CALLED!', $key));
+ if (empty($key)) {
+ // Throw exception
+ throw new InvalidArgumentException('Parameter key is empty');
+ }
+
+ // Read the variable
+ $value = parent::readVariable($key, 'general');
+
+ // Is this null?
+ if (is_null($value)) {
+ // Bah, needs fixing.
+ $this->debugInstance(sprintf('[%s:%d]: key=%s returns NULL', __METHOD__, __LINE__, $key));
+ } // END - if
+
+ // Return value
+ return $value;
+ }
+
+ /**
+ * Handles the template dependency for given XML node
+ *
+ * @param $node The XML node we should load a dependency template
+ * @param $templateDependency A template to load to satisfy dependencies
+ * @return void
+ */
+ protected function handleTemplateDependency ($node, $templateDependency) {
+ // Check that the XML node is not empty
+ assert(!empty($node));
+
+ // Is the template dependency set?
+ if ((!empty($templateDependency)) && (!isset($this->dependencyContent[$node]))) {
+ // Get a temporay template instance
+ $templateInstance = XmlTemplateEngineFactory::createXmlTemplateEngineInstance($this->typePrefix . '_' . self::convertDashesToUnderscores($node) . '_' . $this->xmlTemplateType . '_template_class');
+
+ // Then load it
+ $templateInstance->loadXmlTemplate($templateDependency);
+
+ // Parse the XML content
+ $templateInstance->renderXmlContent();
+
+ // Save the parsed raw content in our dependency array
+ $this->dependencyContent[$node] = $templateInstance->getRawTemplateData();
+ } // END - if
+ }
+
+ /**
+ * Handles the start element of an XML resource
+ *
+ * @param $resource XML parser resource (currently ignored)
+ * @param $element The element we shall handle
+ * @param $attributes All attributes
+ * @return void
+ * @throws InvalidXmlNodeException If an unknown/invalid XML node name was found
+ */
+ public final function startElement ($resource, $element, array $attributes) {
+ // Initial method name which will never be called...
+ $methodName = 'init' . StringUtils::convertToClassName($this->xmlTemplateType);
+
+ // Make the element name lower-case
+ $element = strtolower($element);
+
+ // Is the element a main node?
+ //* DEBUG: */ echo "START: >".$element."<<br />\n";
+ if (in_array($element, $this->getMainNodes())) {
+ // Okay, main node found!
+ $methodName = 'start' . StringUtils::convertToClassName($element);
+
+ // Set it
+ $this->setCurrMainNode($element);
+ } elseif (in_array($element, $this->getSubNodes())) {
+ // Sub node found
+ $methodName = 'start' . StringUtils::convertToClassName($element);
+ } else {
+ // Invalid node name found
+ throw new InvalidXmlNodeException(array($this, $element, $attributes), XmlParser::EXCEPTION_XML_NODE_UNKNOWN);
+ }
+
+ // Call method
+ call_user_func_array(array($this, $methodName), $attributes);
+ }
+
+ /**
+ * Ends the main or sub node by sending out the gathered data
+ *
+ * @param $resource An XML resource pointer (currently ignored)
+ * @param $nodeName Name of the node we want to finish
+ * @return void
+ * @throws XmlNodeMismatchException If current main node mismatches the closing one
+ */
+ public final function finishElement ($resource, $nodeName) {
+ // Make all lower-case
+ $nodeName = strtolower($nodeName);
+
+ // Does this match with current main node?
+ //* DEBUG: */ echo "END: >".$nodeName."<<br />\n";
+ if (($nodeName != $this->getCurrMainNode()) && (in_array($nodeName, $this->getMainNodes()))) {
+ // Did not match!
+ throw new XmlNodeMismatchException (array($this, $nodeName, $this->getCurrMainNode()), XmlParser::EXCEPTION_XML_NODE_MISMATCH);
+ } // END - if
+
+ // Construct method name
+ $methodName = 'finish' . StringUtils::convertToClassName($nodeName);
+
+ // Call the corresponding method
+ //* DEBUG: */ echo "call: ".$methodName."<br />\n";
+ call_user_func_array(array($this, $methodName), array());
+ }
+
+}
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