3 * The own template engine for loading caching and sending out the web pages
6 * @author Roland Haeder <webmaster@mxchange.org>
8 * @copyright Copyright(c) 2007, 2008 Roland Haeder, this is free software
9 * @license GNU GPL 3.0 or any newer version
10 * @link http://www.ship-simu.org
12 * This program is free software: you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation, either version 3 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 class TemplateEngine extends BaseFrameworkSystem implements CompileableTemplate {
27 * The local path name where all templates and sub folders for special
28 * templates are stored. We will internally determine the language plus
29 * "html" for web templates or "emails" for email templates
31 private $basePath = "";
34 * The extension for web and email templates (not compiled templates)
36 private $templateExtension = ".tpl";
39 * The extension for code templates (not compiled templates)
41 private $codeExtension = ".ctp";
44 * Path relative to $basePath and language code for compiled code-templates
46 private $compileOutputPath = "templates/_compiled";
49 * The raw (maybe uncompiled) template
51 private $rawTemplateData = "";
54 * Template data with compiled-in variables
56 private $compiledData = "";
59 * The last loaded template's FQFN for debugging the engine
61 private $lastTemplate = "";
64 * The variable stack for the templates. This must be initialized and
65 * shall become an instance of FrameworkArrayObject.
67 private $varStack = null;
70 * Configuration variables in a simple array
72 private $configVariables = array();
75 * Loaded templates for recursive protection and detection
77 private $loadedTemplates = array();
80 * Compiled templates for recursive protection and detection
82 private $compiledTemplates = array();
85 * Loaded raw template data
87 private $loadedRawData = null;
90 * Raw templates which are linked in code templates
92 private $rawTemplates = null;
95 * A regular expression for variable=value pairs
97 private $regExpVarValue = '/([\w_]+)(="([^"]*)"|=([\w_]+))?/';
100 * A regular expression for filtering out code tags
102 * E.g.: {?template:variable=value;var2=value2;[...]?}
104 private $regExpCodeTags = '/\{\?([a-z_]+)(:("[^"]+"|[^?}]+)+)?\?\}/';
109 private $helpers = array();
111 // Exception codes for the template engine
112 const EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED = 0xa00;
113 const EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR = 0xa01;
114 const EXCEPTION_INVALID_VIEW_HELPER = 0xa02;
117 * Protected constructor
121 protected function __construct () {
122 // Call parent constructor
123 parent::__construct(__CLASS__);
125 // Set part description
126 $this->setObjectDescription("Template-Engine");
128 // Create unique ID number
129 $this->createUniqueID();
132 $this->removeNumberFormaters();
133 $this->removeSystemArray();
137 * Creates an instance of the class TemplateEngine and prepares it for usage
139 * @param $basePath The local base path for all templates
140 * @param $langInstance An instance of LanguageSystem (default)
141 * @param $ioInstance An instance of FileIoHandler (default, middleware!)
142 * @return $tplInstance An instance of TemplateEngine
143 * @throws BasePathIsEmptyException If the provided $basePath is empty
144 * @throws InvalidBasePathStringException If $basePath is no string
145 * @throws BasePathIsNoDirectoryException If $basePath is no
146 * directory or not found
147 * @throws BasePathReadProtectedException If $basePath is
150 public final static function createTemplateEngine ($basePath, ManageableLanguage $langInstance, FileIoHandler $ioInstance) {
151 // Get a new instance
152 $tplInstance = new TemplateEngine();
154 // Is the base path valid?
155 if (empty($basePath)) {
156 // Base path is empty
157 throw new BasePathIsEmptyException($tplInstance, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
158 } elseif (!is_string($basePath)) {
160 throw new InvalidBasePathStringException(array($tplInstance, $basePath), self::EXCEPTION_INVALID_STRING);
161 } elseif (!is_dir($basePath)) {
163 throw new BasePathIsNoDirectoryException(array($tplInstance, $basePath), self::EXCEPTION_INVALID_PATH_NAME);
164 } elseif (!is_readable($basePath)) {
166 throw new BasePathReadProtectedException(array($tplInstance, $basePath), self::EXCEPTION_READ_PROTECED_PATH);
169 // Get configuration instance
170 $cfgInstance = FrameworkConfiguration::getInstance();
173 $tplInstance->setBasePath($basePath);
175 // Initialize the variable stack
176 $tplInstance->initVariableStack();
178 // Set the language and IO instances
179 $tplInstance->setLanguageInstance($langInstance);
180 $tplInstance->setFileIoInstance($ioInstance);
182 // Set template extensions
183 $tplInstance->setRawTemplateExtension($cfgInstance->readConfig("raw_template_extension"));
184 $tplInstance->setCodeTemplateExtension($cfgInstance->readConfig("code_template_extension"));
186 // Absolute output path for compiled templates
187 $tplInstance->setCompileOutputPath(PATH . $cfgInstance->readConfig("compile_output_path"));
189 // Return the prepared instance
194 * Search for a variable in the stack
196 * @param $var The variable we are looking for
197 * @return $idx FALSE means not found, >=0 means found on a specific index
199 private function isVariableAlreadySet ($var) {
200 // First everything is not found
204 for ($idx = $this->varStack->getIterator(); $idx->valid(); $idx->next()) {
206 $currEntry = $idx->current();
208 // Is the entry found?
209 if ($currEntry['name'] == $var) {
211 $found = $idx->key();
216 // Return the current position
221 * Return a content of a variable or null if not found
223 * @param $var The variable we are looking for
224 * @return $content Content of the variable or null if not found
226 private function readVariable ($var) {
227 // First everything is not found
231 for ($idx = $this->varStack->getIterator(); $idx->valid(); $idx->next()) {
233 $currEntry = $idx->current();
235 // Is the entry found?
236 if ($currEntry['name'] == $var) {
238 $content = $currEntry['value'];
243 // Return the current position
248 * Add a variable to the stack
250 * @param $var The variable we are looking for
251 * @param $value The value we want to store in the variable
254 private function addVariable ($var, $value) {
255 // Add it to the stack
256 $this->varStack->append(array(
257 'name' => trim($var),
258 'value' => trim($value)
263 * Modify an entry on the stack
265 * @param $var The variable we are looking for
266 * @param $value The value we want to store in the variable
269 private function modifyVariable ($var, $value) {
270 // It should be there so let's look again...
271 for ($idx = $this->varStack->getIterator(); $idx->valid(); $idx->next()) {
273 $currEntry = $idx->current();
275 // Is this the requested variable?
276 if ($currEntry['name'] == $var) {
277 // Change it to the other value
278 $this->varStack->offsetSet($idx->key(), array(
287 * Initialize the variable stack. This holds all variables for later
292 public final function initVariableStack () {
293 $this->varStack = new FrameworkArrayObject();
297 * Setter for base path
299 * @param $basePath The local base path for all templates
302 public final function setBasePath ($basePath) {
304 $basePath = (string) $basePath;
307 $this->basePath = $basePath;
311 * Getter for base path
313 * @return $basePath The local base path for all templates
315 public final function getBasePath () {
317 return $this->basePath;
321 * Setter for template extension
323 * @param $templateExtension The file extension for all uncompiled
327 public final function setRawTemplateExtension ($templateExtension) {
329 $templateExtension = (string) $templateExtension;
332 $this->templateExtension = $templateExtension;
336 * Setter for code template extension
338 * @param $codeExtension The file extension for all uncompiled
342 public final function setCodeTemplateExtension ($codeExtension) {
344 $codeExtension = (string) $codeExtension;
347 $this->codeExtension = $codeExtension;
351 * Getter for template extension
353 * @return $templateExtension The file extension for all uncompiled
356 public final function getRawTemplateExtension () {
358 return $this->templateExtension;
362 * Getter for code-template extension
364 * @return $codeExtension The file extension for all code-
367 public final function getCodeTemplateExtension () {
369 return $this->codeExtension;
373 * Setter for path of compiled templates
375 * @param $compileOutputPath The local base path for all
379 public final function setCompileOutputPath ($compileOutputPath) {
381 $compileOutputPath = (string) $compileOutputPath;
384 $this->compileOutputPath = $compileOutputPath;
388 * Setter for template type. Only "html", "emails" and "compiled" should
391 * @param $templateType The current template's type
394 private final function setTemplateType ($templateType) {
396 $templateType = (string) $templateType;
398 // And set it (only 2 letters)
399 $this->templateType = $templateType;
403 * Getter for template type
405 * @return $templateType The current template's type
407 public final function getTemplateType () {
408 return $this->templateType;
412 * Setter for the last loaded template's FQFN
414 * @param $template The last loaded template
417 private final function setLastTemplate ($template) {
419 $template = (string) $template;
420 $this->lastTemplate = $template;
424 * Getter for the last loaded template's FQFN
426 * @return $template The last loaded template
428 private final function getLastTemplate () {
429 return $this->lastTemplate;
433 * Assign (add) a given variable with a value
435 * @param $var The variable we are looking for
436 * @param $value The value we want to store in the variable
439 public final function assignVariable ($var, $value) {
440 // First search for the variable if it was already added
441 $idx = $this->isVariableAlreadySet($var);
444 if ($idx === false) {
445 // Add it to the stack
446 $this->addVariable($var, $value);
447 } elseif (!empty($value)) {
448 // Modify the stack entry
449 $this->modifyVariable($var, $value);
454 * Assign a given congfiguration variable with a value
456 * @param $var The configuration variable we are looking for
457 * @param $value The value we want to store in the variable
460 public final function assignConfigVariable ($var, $value) {
461 // Sweet and simple...
462 $this->configVariables[$var] = $value;
466 * Removes a given variable
468 * @param $var The variable we are looking for
471 public final function removeVariable ($var) {
472 // First search for the variable if it was already added
473 $idx = $this->isVariableAlreadySet($var);
476 if ($idx !== false) {
477 // Remove this variable
478 $this->varStack->offsetUnset($idx);
483 * Private setter for raw template data
485 * @param $rawTemplateData The raw data from the template
488 private final function setRawTemplateData ($rawTemplateData) {
490 $rawTemplateData = (string) $rawTemplateData;
492 // And store it in this class
493 $this->rawTemplateData = $rawTemplateData;
497 * Private setter for compiled templates
499 private final function setCompiledData ($compiledData) {
501 $compiledData = (string) $compiledData;
503 // And store it in this class
504 $this->compiledData = $compiledData;
508 * Private loader for all template types
510 * @param $template The template we shall load
513 private final function loadTemplate ($template) {
515 $template = (string) $template;
517 // Get extension for the template
518 $ext = $this->getRawTemplateExtension();
520 // If we shall load a code-template we need to switch the file extension
521 if ($this->getTemplateType() == $this->getConfigInstance()->readConfig("code_template_type")) {
522 // Switch over to the code-template extension
523 $ext = $this->getCodeTemplateExtension();
526 // Construct the FQFN for the template by honoring the current language
527 $fqfn = sprintf("%s%s/%s/%s%s",
528 $this->getBasePath(),
529 $this->getLanguageInstance()->getLanguageCode(),
530 $this->getTemplateType(),
535 // Load the raw template data
536 $this->loadRawTemplateData($fqfn);
540 * A private loader for raw template names
542 * @param $fqfn The full-qualified file name for a template
544 * @throws NullPointerException If $inputInstance is null
545 * @throws NoObjectException If $inputInstance is not an object
546 * @throws MissingMethodException If $inputInstance is missing a
549 private function loadRawTemplateData ($fqfn) {
550 // Get a input/output instance from the middleware
551 $ioInstance = $this->getFileIoInstance();
553 // Validate the instance
554 if (is_null($ioInstance)) {
556 throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
557 } elseif (!is_object($ioInstance)) {
558 // Throw another exception
559 throw new NoObjectException($ioInstance, self::EXCEPTION_IS_NO_OBJECT);
560 } elseif (!method_exists($ioInstance, 'loadFileContents')) {
561 // Throw yet another exception
562 throw new MissingMethodException(array($ioInstance, 'loadFileContents'), self::EXCEPTION_MISSING_METHOD);
565 // Load the raw template
566 $rawTemplateData = $ioInstance->loadFileContents($fqfn);
568 // Store the template's contents into this class
569 $this->setRawTemplateData($rawTemplateData);
571 // Remember the template's FQFN
572 $this->setLastTemplate($fqfn);
576 * Try to assign an extracted template variable as a "content" or "config"
579 * @param $varName The variable's name (shall be content or
581 * @param $var The variable we want to assign
583 private function assignTemplateVariable ($varName, $var) {
584 // Is it not a config variable?
585 if ($varName != "config") {
586 // Regular template variables
587 $this->assignVariable($var, "");
589 // Configuration variables
590 $this->assignConfigVariable($var, $this->getConfigInstance()->readConfig($var));
595 * Extract variables from a given raw data stream
597 * @param $rawData The raw template data we shall analyze
599 * @throws InvalidTemplateVariableNameException If a variable name
603 private function extractVariablesFromRawData ($rawData) {
605 $rawData = (string) $rawData;
607 // Search for variables
608 @preg_match_all('/\$(\w+)(\[(\w+)\])?/', $rawData, $variableMatches);
610 // Did we find some variables?
611 if ((is_array($variableMatches)) && (count($variableMatches) == 4) && (count($variableMatches[0]) > 0)) {
612 // Initialize all missing variables
613 foreach ($variableMatches[3] as $key=>$var) {
614 // Is the variable name valid?
615 // @TODO Find a better way than ignoring our instance variable $this
616 if (($variableMatches[1][$key] != $this->getConfigInstance()->readConfig("tpl_valid_var")) && ($variableMatches[1][$key] != "config") && ($variableMatches[1][$key] != "this")) {
617 // Invalid variable name
618 throw new InvalidTemplateVariableNameException(array($this, $this->getLastTemplate(), $variableMatches[1][$key], $this->getConfigInstance()), self::EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR);
619 } elseif ($variableMatches[1][$key] != "this") {
620 // Try to assign it, empty strings are being ignored
621 $this->assignTemplateVariable($variableMatches[1][$key], $var);
628 * Main analysis of the loaded template
630 * @param $templateMatches Found template place-holders, see below
633 *---------------------------------
634 * Structure of $templateMatches:
635 *---------------------------------
636 * [0] => Array - An array with all full matches
637 * [1] => Array - An array with left part (before the ":") of a match
638 * [2] => Array - An array with right part of a match including ":"
639 * [3] => Array - An array with right part of a match excluding ":"
641 private function analyzeTemplate (array $templateMatches) {
642 // Backup raw template data
643 $backup = $this->getRawTemplateData();
645 // Initialize some arrays
646 if (is_null($this->loadedRawData)) { $this->loadedRawData = array(); $this->rawTemplates = array(); }
648 // Load all requested templates
649 foreach ($templateMatches[1] as $template) {
651 // Load and compile only templates which we have not yet loaded
652 // RECURSIVE PROTECTION! BE CAREFUL HERE!
653 if ((!isset($this->loadedRawData[$template])) && (!in_array($template, $this->loadedTemplates))) {
655 // Then try to search for code-templates first
657 // Load the code template and remember it's contents
658 $this->loadCodeTemplate($template);
659 $this->loadedRawData[$template] = $this->getRawTemplateData();
661 // Remember this template for recursion detection
662 // RECURSIVE PROTECTION!
663 $this->loadedTemplates[] = $template;
664 } catch (FilePointerNotOpenedException $e) {
665 // Template not found, but maybe variable assigned?
666 if ($this->isVariableAlreadySet($template) !== false) {
667 // Use that content here
668 $this->loadedRawData[$template] = $this->readVariable($template);
670 // Recursive protection:
671 $this->loadedTemplates[] = $template;
673 // Even this is not done... :/
674 $this->rawTemplates[] = $template;
678 } // if ((!isset( ...
680 } // for ($templateMatches ...
682 // Restore the raw template data
683 $this->setRawTemplateData($backup);
687 * Compile a given raw template code and remember it for later usage
689 * @param $code The raw template code
690 * @param $template The template's name
693 private function compileCode ($code, $template) {
694 // Is this template already compiled?
695 if (in_array($template, $this->compiledTemplates)) {
700 // Remember this template being compiled
701 $this->compiledTemplates[] = $template;
703 // Compile the loaded code in five steps:
705 // 1. Backup current template data
706 $backup = $this->getRawTemplateData();
708 // 2. Set the current template's raw data as the new content
709 $this->setRawTemplateData($code);
711 // 3. Compile the template data
712 $this->compileTemplate();
714 // 4. Remember it's contents
715 $this->loadedRawData[$template] = $this->getRawTemplateData();
717 // 5. Restore the previous raw content from backup variable
718 $this->setRawTemplateData($backup);
722 * Insert all given and loaded templates by running through all loaded
723 * codes and searching for their place-holder in the main template
725 * @param $templateMatches See method analyzeTemplate()
728 private function insertAllTemplates (array $templateMatches) {
729 // Run through all loaded codes
730 foreach ($this->loadedRawData as $template=>$code) {
732 // Search for the template
733 $foundIndex = array_search($template, $templateMatches[1]);
735 // Lookup the matching template replacement
736 if (($foundIndex !== false) && (isset($templateMatches[0][$foundIndex]))) {
738 // Get the current raw template
739 $rawData = $this->getRawTemplateData();
741 // Replace the space holder with the template code
742 $rawData = str_replace($templateMatches[0][$foundIndex], $code, $rawData);
744 // Set the new raw data
745 $this->setRawTemplateData($rawData);
753 * Load all extra raw templates
757 private function loadExtraRawTemplates () {
758 // Are there some raw templates we need to load?
759 if (count($this->rawTemplates) > 0) {
760 // Try to load all raw templates
761 foreach ($this->rawTemplates as $key => $template) {
764 $this->loadWebTemplate($template);
766 // Remember it's contents
767 $this->rawTemplates[$template] = $this->getRawTemplateData();
769 // Remove it from the loader list
770 unset($this->rawTemplates[$key]);
772 // Remember this template for recursion detection
773 // RECURSIVE PROTECTION!
774 $this->loadedTemplates[] = $template;
775 } catch (FilePointerNotOpenedException $e) {
776 // This template was never found. We silently ignore it
777 unset($this->rawTemplates[$key]);
784 * Assign all found template variables
786 * @param $varMatches An array full of variable/value pairs.
789 private function assignAllVariables (array $varMatches) {
790 // Search for all variables
791 foreach ($varMatches[1] as $key=>$var) {
793 // Detect leading equals
794 if (substr($varMatches[2][$key], 0, 1) == "=") {
795 // Remove and cast it
796 $varMatches[2][$key] = (string) substr($varMatches[2][$key], 1);
799 // Do we have some quotes left and right side? Then it is free text
800 if ((substr($varMatches[2][$key], 0, 1) == "\"") && (substr($varMatches[2][$key], -1, 1) == "\"")) {
801 // Free string detected! Which we can assign directly
802 $this->assignVariable($var, $varMatches[3][$key]);
803 } elseif (!empty($varMatches[2][$key])) {
804 // Non-string found so we need some deeper analysis...
805 // @TODO Unfinished work or don't die here.
806 die("Deeper analysis not yet implemented!");
809 } // for ($varMatches ...
812 * Compiles all loaded raw templates
814 * @param $templateMatches See method analyzeTemplate() for details
817 private function compileRawTemplateData (array $templateMatches) {
818 // Are some code-templates found which we need to compile?
819 if (count($this->loadedRawData) > 0) {
822 foreach ($this->loadedRawData as $template=>$code) {
824 // Is this template already compiled?
825 if (in_array($template, $this->compiledTemplates)) {
830 // Search for the template
831 $foundIndex = array_search($template, $templateMatches[1]);
833 // Lookup the matching variable data
834 if (($foundIndex !== false) && (isset($templateMatches[3][$foundIndex]))) {
836 // Split it up with another reg. exp. into variable=value pairs
837 preg_match_all($this->regExpVarValue, $templateMatches[3][$foundIndex], $varMatches);
839 // Assign all variables
840 $this->assignAllVariables($varMatches);
842 } // END - if (isset($templateMatches ...
844 // Compile the loaded template
845 $this->compileCode($code, $template);
847 } // END - foreach ($this->loadedRawData ...
849 // Insert all templates
850 $this->insertAllTemplates($templateMatches);
852 } // END - if (count($this->loadedRawData) ...
856 * Inserts all raw templates into their respective variables
860 private function insertRawTemplates () {
861 // Load all templates
862 foreach ($this->rawTemplates as $template=>$content) {
863 // Set the template as a variable with the content
864 $this->assignVariable($template, $content);
869 * Finalizes the compilation of all template variables
873 private function finalizeVariableCompilation () {
875 $content = $this->getRawTemplateData();
877 // Walk through all variables
878 for ($idx = $this->varStack->getIterator(); $idx->valid(); $idx->next()) {
880 $currEntry = $idx->current();
882 // Replace all [$var] or {?$var?} with the content
883 //* DEBUG: */ echo "name=".$currEntry['name'].", value=<pre>".htmlentities($currEntry['value'])."</pre>\n";
884 $content = str_replace("\$content[".$currEntry['name']."]", $currEntry['value'], $content);
885 $content = str_replace("[".$currEntry['name']."]", $currEntry['value'], $content);
886 $content = str_replace("{?".$currEntry['name']."?}", $currEntry['value'], $content);
889 // Set the content back
890 $this->setRawTemplateData($content);
894 * Getter for raw template data
896 * @return $rawTemplateData The raw data from the template
898 public final function getRawTemplateData () {
899 return $this->rawTemplateData;
903 * Getter for compiled templates
905 public final function getCompiledData () {
906 return $this->compiledData;
910 * Load a specified web template into the engine
912 * @param $template The web template we shall load which is
913 * located in "html" by default
916 public final function loadWebTemplate ($template) {
918 $this->setTemplateType($this->getConfigInstance()->readConfig("web_template_type"));
920 // Load the special template
921 $this->loadTemplate($template);
925 * Load a specified email template into the engine
927 * @param $template The email template we shall load which is
928 * located in "emails" by default
931 public final function loadEmailTemplate ($template) {
933 $this->setTemplateType($this->getConfigInstance()->readConfig("email_template_type"));
935 // Load the special template
936 $this->loadTemplate($template);
940 * Load a specified code template into the engine
942 * @param $template The code template we shall load which is
943 * located in "code" by default
946 public final function loadCodeTemplate ($template) {
948 $this->setTemplateType($this->getConfigInstance()->readConfig("code_template_type"));
950 // Load the special template
951 $this->loadTemplate($template);
955 * Compile all variables by inserting their respective values
959 public final function compileVariables () {
960 // Initialize the $content array
961 $validVar = $this->getConfigInstance()->readConfig("tpl_valid_var");
964 // Iterate through all variables
965 for ($idx = $this->varStack->getIterator(); $idx->valid(); $idx->next()) {
967 // Get current variable from the stack
968 $currVariable = $idx->current();
970 // Transfer it's name/value combination to the $content array
971 //* DEBUG: */ echo $currVariable['name']."=<pre>".htmlentities($currVariable['value'])."</pre>\n";
972 $dummy[$currVariable['name']] = $currVariable['value'];
976 // Set the new variable (don't remove the second dollar !)
979 // Prepare all configuration variables
980 $config = $this->configVariables;
982 // Remove some variables
984 unset($currVariable);
986 // Finalize the compilation of template variables
987 $this->finalizeVariableCompilation();
989 // Prepare the eval() command for comiling the template
990 $eval = sprintf("\$result = \"%s\";",
991 addslashes($this->getRawTemplateData())
994 // This loop does remove the backslashes (\) in PHP parameters
995 // @TODO Make this some nicer...
996 while (strpos($eval, "<?") !== false) {
997 // Get left part before "<?"
998 $evalLeft = substr($eval, 0, strpos($eval, "<?"));
1000 // Get all from right of "<?"
1001 $evalRight = substr($eval, (strpos($eval, "<?") + 2));
1003 // Is this a full PHP tag?
1004 if (substr(strtolower($evalRight), 0, 3) == "php") {
1005 // Remove "php" string from full PHP tag
1006 $evalRight = substr($evalRight, 3);
1009 // Cut middle part out and remove escapes
1010 $evalMiddle = trim(substr($evalRight, 0, strpos($evalRight, "?>")));
1011 $evalMiddle = stripslashes($evalMiddle);
1013 // Remove the middle part from right one
1014 $evalRight = substr($evalRight, (strpos($evalRight, "?>") + 2));
1016 // And put all together
1017 $eval = sprintf("%s<%%php %s %%>%s", $evalLeft, $evalMiddle, $evalRight);
1020 // Prepare PHP code for eval() command
1021 $eval = str_replace(
1024 "%>", "\$result = \"", $eval
1029 if ((defined('DEBUG_EVAL')) && (is_object($this->getDebugInstance()))) $this->getDebugInstance()->output(sprintf("[%s:] Constructed PHP command: <pre><em>%s</em></pre><br />\n",
1030 $this->__toString(),
1034 // Run the constructed command. This will "compile" all variables in
1037 // Set the new content
1038 $this->setCompiledData($result);
1042 * Compile all required templates into the current loaded one
1045 * @throws UnexpectedTemplateTypeException If the template type is
1047 * @throws InvalidArrayCountException If an unexpected array
1048 * count has been found
1050 public final function compileTemplate () {
1051 // We will only work with template type "code" from configuration
1052 if ($this->getTemplateType() != $this->getConfigInstance()->readConfig("code_template_type")) {
1054 throw new UnexpectedTemplateTypeException(array($this, $this->getTemplateType(), $this->getConfigInstance()->readConfig("code_template_type")), self::EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED);
1057 // Get the raw data.
1058 $rawData = $this->getRawTemplateData();
1060 // Remove double spaces and trim leading/trailing spaces
1061 $rawData = trim(str_replace(" ", " ", $rawData));
1063 // Search for raw variables
1064 $this->extractVariablesFromRawData($rawData);
1066 // Search for code-tags which are {? ?}
1067 preg_match_all($this->regExpCodeTags, $rawData, $templateMatches);
1069 // Analyze the matches array
1070 if ((is_array($templateMatches)) && (count($templateMatches) == 4) && (count($templateMatches[0]) > 0)) {
1071 // Entries are found:
1073 // The main analysis
1074 $this->analyzeTemplate($templateMatches);
1076 // Compile raw template data
1077 $this->compileRawTemplateData($templateMatches);
1079 // Are there some raw templates left for loading?
1080 $this->loadExtraRawTemplates();
1082 // Are some raw templates found and loaded?
1083 if (count($this->rawTemplates) > 0) {
1085 // Insert all raw templates
1086 $this->insertRawTemplates();
1088 // Remove the raw template content as well
1089 $this->setRawTemplateData("");
1093 } // END - if($templateMatches ...
1097 * Output the compiled page to the outside world. In case of web templates
1098 * this would be vaild (X)HTML code. And in case of email templates this
1099 * would store a prepared email body inside the template engine.
1103 public final function output () {
1104 // Check which type of template we have
1105 switch ($this->getTemplateType()) {
1106 case "html": // Raw HTML templates can be send to the output buffer
1108 $this->getWebOutputInstance()->output($this->getCompiledData());
1111 default: // Unknown type found
1112 // Construct message
1113 $msg = sprintf("[%s:] Unknown/unsupported template type <strong>%s</strong> detected.",
1114 $this->__toString(),
1115 $this->getTemplateType()
1118 if ((is_object($this->getDebugInstance())) && (method_exists($this->getDebugInstance(), 'output'))) {
1119 // Use debug output handler
1120 $this->getDebugInstance()->output($msg);
1124 // DO NOT REWRITE THIS TO app_die() !!!
1132 * Loads a given view helper (by name)
1134 * @param $helperName The helper's name
1136 * @throws ViewHelperNotFoundException If the given view helper was not found
1138 protected function loadViewHelper ($helperName) {
1139 // Make first character upper case, rest low
1140 $helperName = ucfirst($helperName);
1142 // Is this view helper loaded?
1143 if (!isset($this->helpers[$helperName])) {
1144 // Create a class name
1145 $className = "{$helperName}ViewHelper";
1147 // Does this class exists?
1148 if (!class_exists($className)) {
1150 throw new ViewHelperNotFoundException(array($this, $helperName), self::EXCEPTION_INVALID_VIEW_HELPER);
1153 // Generate new instance
1154 $eval = sprintf("\$this->helpers[%s] = %s::create%s();",
1164 // Return the requested instance
1165 return $this->helpers[$helperName];
1169 * Assigns the last loaded raw template content with a given variable
1171 * @param $templateName Name of the template we want to assign
1172 * @param $variableName Name of the variable we want to assign
1175 public function assignTemplateWithVariable ($templateName, $variableName) {
1176 // Get the content from last loaded raw template
1177 $content = $this->getRawTemplateData();
1179 // Assign the variable
1180 $this->assignVariable($variableName, $content);
1182 // Purge raw content
1183 $this->setRawTemplateData("");
1187 * Transfers the content of this template engine to a given response instance
1189 * @param $responseInstance An instance of a response class
1192 public function transferToResponse (Responseable $responseInstance) {
1193 // Get the content and set it in the response class
1194 $responseInstance->writeToBody($this->getCompiledData());
1198 * Assigns all the application data with template variables
1200 * @param $appInstance A manageable application instance
1203 public function assignApplicationData (ManageableApplication $appInstance) {
1204 // Get long name and assign it
1205 $this->assignVariable("app_full_name" , $appInstance->getAppName());
1207 // Get short name and assign it
1208 $this->assignVariable("app_short_name", $appInstance->getAppShortName());
1210 // Get version number and assign it
1211 $this->assignVariable("app_version" , $appInstance->getAppVersion());