3 * A generic template engine
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 Core Developer Team
8 * @license GNU GPL 3.0 or any newer version
9 * @link http://www.ship-simu.org
11 * This program is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 class BaseTemplateEngine extends BaseFrameworkSystem {
26 * The local path name where all templates and sub folders for special
27 * templates are stored. We will internally determine the language plus
28 * "html" for web templates or "emails" for email templates
30 private $templateBasePath = '';
35 private $templateType = 'html';
38 * The extension for web and email templates (not compiled templates)
40 private $templateExtension = '.tpl';
43 * The extension for code templates (not compiled templates)
45 private $codeExtension = '.ctp';
48 * Path relative to $templateBasePath and language code for compiled code-templates
50 private $compileOutputPath = 'templates/_compiled/';
53 * The path name for all templates
55 private $genericBasePath = 'templates/';
58 * The raw (maybe uncompiled) template
60 private $rawTemplateData = '';
63 * Template data with compiled-in variables
65 private $compiledData = '';
68 * The last loaded template's FQFN for debugging the engine
70 private $lastTemplate = '';
73 * The variable stack for the templates
75 private $varStack = array();
78 * Loaded templates for recursive protection and detection
80 private $loadedTemplates = array();
83 * Compiled templates for recursive protection and detection
85 private $compiledTemplates = array();
88 * Loaded raw template data
90 private $loadedRawData = null;
93 * Raw templates which are linked in code templates
95 private $rawTemplates = null;
98 * A regular expression for variable=value pairs
100 private $regExpVarValue = '/([\w_]+)(="([^"]*)"|=([\w_]+))?/';
103 * A regular expression for filtering out code tags
105 * E.g.: {?template:variable=value;var2=value2;[...]?}
107 private $regExpCodeTags = '/\{\?([a-z_]+)(:("[^"]+"|[^?}]+)+)?\?\}/';
112 private $helpers = array();
115 * Current variable group
117 private $currGroup = 'general';
120 * All template groups except "general"
122 private $varGroups = array();
127 private $codeBegin = '<?php';
132 private $codeEnd = '?>';
135 * Language support is enabled by default
137 private $languageSupport = true;
139 // Exception codes for the template engine
140 const EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED = 0x110;
141 const EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR = 0x111;
142 const EXCEPTION_INVALID_VIEW_HELPER = 0x112;
145 * Protected constructor
147 * @param $className Name of the class
150 protected function __construct ($className) {
151 // Call parent constructor
152 parent::__construct($className);
156 * Search for a variable in the stack
158 * @param $var The variable we are looking for
159 * @return $idx FALSE means not found, >=0 means found on a specific index
161 private function isVariableAlreadySet ($var) {
162 // First everything is not found
165 // Is the group there?
166 if (isset($this->varStack[$this->currGroup])) {
168 foreach ($this->varStack[$this->currGroup] as $idx => $currEntry) {
169 //* DEBUG: */ echo __METHOD__.":currGroup={$this->currGroup},idx={$idx},currEntry={$currEntry['name']},var={$var}<br />\n";
170 // Is the entry found?
171 if ($currEntry['name'] == $var) {
173 //* DEBUG: */ echo __METHOD__.":FOUND!<br />\n";
180 // Return the current position
185 * Return a content of a variable or null if not found
187 * @param $var The variable we are looking for
188 * @return $content Content of the variable or null if not found
190 protected function readVariable ($var) {
191 // First everything is not found
194 // Get variable index
195 $found = $this->isVariableAlreadySet($var);
197 // Is the variable found?
198 if ($found !== false) {
200 $content = $this->varStack[$this->currGroup][$found]['value'];
203 // Return the current position
204 //* DEBUG: */ echo __METHOD__.": group=".$this->currGroup.",var=".$var.", content[".gettype($content)."]=".$content."<br />\n";
209 * Add a variable to the stack
211 * @param $var The variable we are looking for
212 * @param $value The value we want to store in the variable
215 private function addVariable ($var, $value) {
216 // Set general variable group
217 $this->setVariableGroup('general');
219 // Add it to the stack
220 $this->addGroupVariable($var, $value);
224 * Returns all variables of current group or empty array
226 * @return $result Wether array of found variables or empty array
228 private function readCurrentGroup () {
229 // Default is not found
232 // Is the group there?
233 if (isset($this->varStack[$this->currGroup])) {
235 $result = $this->varStack[$this->currGroup];
243 * Settter for variable group
245 * @param $groupName Name of variable group
246 * @param $add Wether add this group
249 public function setVariableGroup ($groupName, $add = true) {
251 //* DEBIG: */ echo __METHOD__.": currGroup=".$groupName."<br />\n";
252 $this->currGroup = $groupName;
254 // Skip group 'general'
255 if (($groupName != 'general') && ($add === true)) {
256 $this->varGroups[$groupName] = 'OK';
262 * Adds a variable to current group
264 * @param $var Variable to set
265 * @param $value Value to store in variable
268 public function addGroupVariable ($var, $value) {
269 //* DEBUG: */ echo __METHOD__.": group=".$this->currGroup.", var=".$var.", value=".$value."<br />\n";
271 // Get current variables in group
272 $currVars = $this->readCurrentGroup();
274 // Append our variable
280 // Add it to the stack
281 $this->varStack[$this->currGroup] = $currVars;
285 * Modify an entry on the stack
287 * @param $var The variable we are looking for
288 * @param $value The value we want to store in the variable
291 private function modifyVariable ($var, $value) {
292 // Get index for variable
293 $idx = $this->isVariableAlreadySet($var);
295 // Is the variable set?
296 if ($idx !== false) {
298 $this->varStack[$this->currGroup][$idx]['value'] = $value;
303 * Setter for template type. Only 'html', 'emails' and 'compiled' should
306 * @param $templateType The current template's type
309 protected final function setTemplateType ($templateType) {
310 $this->templateType = (string) $templateType;
314 * Setter for the last loaded template's FQFN
316 * @param $template The last loaded template
319 private final function setLastTemplate ($template) {
320 $this->lastTemplate = (string) $template;
324 * Getter for the last loaded template's FQFN
326 * @return $template The last loaded template
328 private final function getLastTemplate () {
329 return $this->lastTemplate;
333 * Setter for base path
335 * @param $templateBasePath The relative base path for all templates
338 public final function setTemplateBasePath ($templateBasePath) {
340 $this->templateBasePath = (string) $templateBasePath;
344 * Getter for base path
346 * @return $templateBasePath The relative base path for all templates
348 public final function getTemplateBasePath () {
350 return $this->templateBasePath;
354 * Getter for generic base path
356 * @return $templateBasePath The relative base path for all templates
358 public final function getGenericBasePath () {
360 return $this->genericBasePath;
364 * Setter for template extension
366 * @param $templateExtension The file extension for all uncompiled
370 public final function setRawTemplateExtension ($templateExtension) {
372 $this->templateExtension = (string) $templateExtension;
376 * Setter for code template extension
378 * @param $codeExtension The file extension for all uncompiled
382 public final function setCodeTemplateExtension ($codeExtension) {
384 $this->codeExtension = (string) $codeExtension;
388 * Getter for template extension
390 * @return $templateExtension The file extension for all uncompiled
393 public final function getRawTemplateExtension () {
395 return $this->templateExtension;
399 * Getter for code-template extension
401 * @return $codeExtension The file extension for all code-
404 public final function getCodeTemplateExtension () {
406 return $this->codeExtension;
410 * Setter for path of compiled templates
412 * @param $compileOutputPath The local base path for all compiled
416 public final function setCompileOutputPath ($compileOutputPath) {
418 $this->compileOutputPath = (string) $compileOutputPath;
422 * Getter for template type
424 * @return $templateType The current template's type
426 public final function getTemplateType () {
427 return $this->templateType;
431 * Assign (add) a given variable with a value
433 * @param $var The variable we are looking for
434 * @param $value The value we want to store in the variable
436 * @throws EmptyVariableException If the variable name is left empty
438 public final function assignVariable ($var, $value) {
439 // Trim spaces of variable name
442 // Empty variable found?
444 // Throw an exception
445 throw new EmptyVariableException(array($this, 'var'), self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
448 // First search for the variable if it was already added
449 $idx = $this->isVariableAlreadySet($var);
452 if ($idx === false) {
453 // Add it to the stack
454 //* DEBUG: */ echo "ADD: ".$var."<br />\n";
455 $this->addVariable($var, $value);
456 } elseif (!empty($value)) {
457 // Modify the stack entry
458 //* DEBUG: */ echo "MOD: ".$var."<br />\n";
459 $this->modifyVariable($var, $value);
464 * Removes a given variable
466 * @param $var The variable we are looking for
469 public final function removeVariable ($var) {
470 // First search for the variable if it was already added
471 $idx = $this->isVariableAlreadySet($var);
474 if ($idx !== false) {
475 // Remove this variable
476 $this->varStack->offsetUnset($idx);
481 * Private setter for raw template data
483 * @param $rawTemplateData The raw data from the template
486 protected final function setRawTemplateData ($rawTemplateData) {
487 // And store it in this class
488 //* DEBUG: */ echo __METHOD__.':'.$this->getUniqueId().': '.strlen($rawTemplateData).' Bytes set.<br />\n';
489 //* DEBUG: */ echo $this->currGroup.' variables: '.count($this->varStack[$this->currGroup]).', groups='.count($this->varStack).'<br />\n';
490 $this->rawTemplateData = (string) $rawTemplateData;
494 * Getter for raw template data
496 * @return $rawTemplateData The raw data from the template
498 public final function getRawTemplateData () {
499 //* DEBUG: */ echo __METHOD__.':'.$this->getUniqueId().': '.strlen($this->rawTemplateData).' Bytes read.<br />\n';
500 return $this->rawTemplateData;
504 * Private setter for compiled templates
508 private final function setCompiledData ($compiledData) {
509 // And store it in this class
510 //* DEBUG: */ echo __METHOD__.':'.$this->getUniqueId().': '.strlen($compiledData).' Bytes set.<br />\n';
511 $this->compiledData = (string) $compiledData;
515 * Getter for compiled templates
517 * @return $compiledData Compiled template data
519 public final function getCompiledData () {
520 //* DEBUG: */ echo __METHOD__.':'.$this->getUniqueId().': '.strlen($this->compiledData).' Bytes read.<br />\n';
521 return $this->compiledData;
525 * Private loader for all template types
527 * @param $template The template we shall load
528 * @param $extOther An other extension to use
530 * @throws FileIoException If the template was not found
532 protected function loadTemplate ($template, $extOther = '') {
533 // Get extension for the template if empty
534 if (empty($extOther)) {
535 // None provided, so get the raw one
536 $ext = $this->getRawTemplateExtension();
539 $ext = (string) $extOther;
542 // Is language support enabled?
543 if ($this->isLanguageSupportEnabled()) {
544 // Construct the FQFN for the template by honoring the current language
545 $fqfn = sprintf("%s%s%s%s/%s/%s%s",
546 $this->getConfigInstance()->getConfigEntry('base_path'),
547 $this->getTemplateBasePath(),
548 $this->getGenericBasePath(),
549 $this->getLanguageInstance()->getLanguageCode(),
550 $this->getTemplateType(),
555 // Construct the FQFN for the template without language
556 $fqfn = sprintf("%s%s%s%s/%s%s",
557 $this->getConfigInstance()->getConfigEntry('base_path'),
558 $this->getTemplateBasePath(),
559 $this->getGenericBasePath(),
560 $this->getTemplateType(),
568 // Load the raw template data
569 $this->loadRawTemplateData($fqfn);
570 } catch (FileIoException $e) {
571 // If we shall load a code-template we need to switch the file extension
572 if (($this->getTemplateType() != $this->getConfigInstance()->getConfigEntry('web_template_type')) && (empty($extOther))) {
573 // Switch over to the code-template extension and try it again
574 $ext = $this->getCodeTemplateExtension();
577 $this->loadTemplate($template, $ext);
580 throw new FileIoException($fqfn, FrameworkFileInputPointer::EXCEPTION_FILE_NOT_FOUND);
587 * A private loader for raw template names
589 * @param $fqfn The full-qualified file name for a template
592 private function loadRawTemplateData ($fqfn) {
593 // Get a input/output instance from the middleware
594 $ioInstance = $this->getFileIoInstance();
596 // Some debug code to look on the file which is being loaded
597 //* DEBUG: */ echo __METHOD__.": FQFN=".$fqfn."<br />\n";
599 // Load the raw template
600 $rawTemplateData = $ioInstance->loadFileContents($fqfn);
602 // Store the template's contents into this class
603 $this->setRawTemplateData($rawTemplateData);
605 // Remember the template's FQFN
606 $this->setLastTemplate($fqfn);
610 * Try to assign an extracted template variable as a "content" or 'config'
613 * @param $varName The variable's name (shall be content orconfig) by
615 * @param $var The variable we want to assign
617 private function assignTemplateVariable ($varName, $var) {
618 // Is it not a config variable?
619 if ($varName != 'config') {
620 // Regular template variables
621 $this->assignVariable($var, '');
623 // Configuration variables
624 $this->assignConfigVariable($var);
629 * Extract variables from a given raw data stream
631 * @param $rawData The raw template data we shall analyze
634 private function extractVariablesFromRawData ($rawData) {
636 $rawData = (string) $rawData;
638 // Search for variables
639 @preg_match_all('/\$(\w+)(\[(\w+)\])?/', $rawData, $variableMatches);
641 // Did we find some variables?
642 if ((is_array($variableMatches)) && (count($variableMatches) == 4) && (count($variableMatches[0]) > 0)) {
643 // Initialize all missing variables
644 foreach ($variableMatches[3] as $key => $var) {
646 $varName = $variableMatches[1][$key];
648 // Workarround: Do not assign empty variables
650 // Try to assign it, empty strings are being ignored
651 $this->assignTemplateVariable($varName, $var);
658 * Main analysis of the loaded template
660 * @param $templateMatches Found template place-holders, see below
663 *---------------------------------
664 * Structure of $templateMatches:
665 *---------------------------------
666 * [0] => Array - An array with all full matches
667 * [1] => Array - An array with left part (before the ':') of a match
668 * [2] => Array - An array with right part of a match including ':'
669 * [3] => Array - An array with right part of a match excluding ':'
671 private function analyzeTemplate (array $templateMatches) {
672 // Backup raw template data
673 $backup = $this->getRawTemplateData();
675 // Initialize some arrays
676 if (is_null($this->loadedRawData)) { $this->loadedRawData = array(); $this->rawTemplates = array(); }
678 // Load all requested templates
679 foreach ($templateMatches[1] as $template) {
681 // Load and compile only templates which we have not yet loaded
682 // RECURSIVE PROTECTION! BE CAREFUL HERE!
683 if ((!isset($this->loadedRawData[$template])) && (!in_array($template, $this->loadedTemplates))) {
685 // Template not found, but maybe variable assigned?
686 //* DEBUG: */ echo __METHOD__.":template={$template}<br />\n";
687 if ($this->isVariableAlreadySet($template) !== false) {
688 // Use that content here
689 $this->loadedRawData[$template] = $this->readVariable($template);
691 // Recursive protection:
692 $this->loadedTemplates[] = $template;
693 } elseif (isset($this->varStack['config'][$template])) {
694 // Use that content here
695 $this->loadedRawData[$template] = $this->varStack['config'][$template];
697 // Recursive protection:
698 $this->loadedTemplates[] = $template;
700 // Then try to search for code-templates
702 // Load the code template and remember it's contents
703 $this->loadCodeTemplate($template);
704 $this->loadedRawData[$template] = $this->getRawTemplateData();
706 // Remember this template for recursion detection
707 // RECURSIVE PROTECTION!
708 $this->loadedTemplates[] = $template;
709 } catch (FileIoException $e) {
710 // Even this is not done... :/
711 $this->rawTemplates[] = $template;
717 // Restore the raw template data
718 $this->setRawTemplateData($backup);
722 * Compile a given raw template code and remember it for later usage
724 * @param $code The raw template code
725 * @param $template The template's name
728 private function compileCode ($code, $template) {
729 // Is this template already compiled?
730 if (in_array($template, $this->compiledTemplates)) {
735 // Remember this template being compiled
736 $this->compiledTemplates[] = $template;
738 // Compile the loaded code in five steps:
740 // 1. Backup current template data
741 $backup = $this->getRawTemplateData();
743 // 2. Set the current template's raw data as the new content
744 $this->setRawTemplateData($code);
746 // 3. Compile the template data
747 $this->compileTemplate();
749 // 4. Remember it's contents
750 $this->loadedRawData[$template] = $this->getRawTemplateData();
752 // 5. Restore the previous raw content from backup variable
753 $this->setRawTemplateData($backup);
757 * Insert all given and loaded templates by running through all loaded
758 * codes and searching for their place-holder in the main template
760 * @param $templateMatches See method analyzeTemplate()
763 private function insertAllTemplates (array $templateMatches) {
764 // Run through all loaded codes
765 foreach ($this->loadedRawData as $template => $code) {
767 // Search for the template
768 $foundIndex = array_search($template, $templateMatches[1]);
770 // Lookup the matching template replacement
771 if (($foundIndex !== false) && (isset($templateMatches[0][$foundIndex]))) {
773 // Get the current raw template
774 $rawData = $this->getRawTemplateData();
776 // Replace the space holder with the template code
777 $rawData = str_replace($templateMatches[0][$foundIndex], $code, $rawData);
779 // Set the new raw data
780 $this->setRawTemplateData($rawData);
786 * Load all extra raw templates
790 private function loadExtraRawTemplates () {
791 // Are there some raw templates we need to load?
792 if (count($this->rawTemplates) > 0) {
793 // Try to load all raw templates
794 foreach ($this->rawTemplates as $key => $template) {
797 $this->loadWebTemplate($template);
799 // Remember it's contents
800 $this->rawTemplates[$template] = $this->getRawTemplateData();
802 // Remove it from the loader list
803 unset($this->rawTemplates[$key]);
805 // Remember this template for recursion detection
806 // RECURSIVE PROTECTION!
807 $this->loadedTemplates[] = $template;
808 } catch (FileIoException $e) {
809 // This template was never found. We silently ignore it
810 unset($this->rawTemplates[$key]);
817 * Assign all found template variables
819 * @param $varMatches An array full of variable/value pairs.
821 * @todo Unfinished work or don't die here.
823 private function assignAllVariables (array $varMatches) {
824 // Search for all variables
825 foreach ($varMatches[1] as $key => $var) {
827 // Detect leading equals
828 if (substr($varMatches[2][$key], 0, 1) == '=') {
829 // Remove and cast it
830 $varMatches[2][$key] = (string) substr($varMatches[2][$key], 1);
833 // Do we have some quotes left and right side? Then it is free text
834 if ((substr($varMatches[2][$key], 0, 1) == "\"") && (substr($varMatches[2][$key], -1, 1) == "\"")) {
835 // Free string detected! Which we can assign directly
836 $this->assignVariable($var, $varMatches[3][$key]);
837 } elseif (!empty($varMatches[2][$key])) {
838 // @TODO Non-string found so we need some deeper analysis...
839 ApplicationEntryPoint::app_die('Deeper analysis not yet implemented!');
842 } // for ($varMatches ...
845 * Compiles all loaded raw templates
847 * @param $templateMatches See method analyzeTemplate() for details
850 private function compileRawTemplateData (array $templateMatches) {
851 // Are some code-templates found which we need to compile?
852 if (count($this->loadedRawData) > 0) {
855 foreach ($this->loadedRawData as $template => $code) {
857 // Is this template already compiled?
858 if (in_array($template, $this->compiledTemplates)) {
863 // Search for the template
864 $foundIndex = array_search($template, $templateMatches[1]);
866 // Lookup the matching variable data
867 if (($foundIndex !== false) && (isset($templateMatches[3][$foundIndex]))) {
869 // Split it up with another reg. exp. into variable=value pairs
870 preg_match_all($this->regExpVarValue, $templateMatches[3][$foundIndex], $varMatches);
872 // Assign all variables
873 $this->assignAllVariables($varMatches);
875 } // END - if (isset($templateMatches ...
877 // Compile the loaded template
878 $this->compileCode($code, $template);
880 } // END - foreach ($this->loadedRawData ...
882 // Insert all templates
883 $this->insertAllTemplates($templateMatches);
885 } // END - if (count($this->loadedRawData) ...
889 * Inserts all raw templates into their respective variables
893 private function insertRawTemplates () {
894 // Load all templates
895 foreach ($this->rawTemplates as $template => $content) {
896 // Set the template as a variable with the content
897 $this->assignVariable($template, $content);
902 * Finalizes the compilation of all template variables
906 private function finalizeVariableCompilation () {
908 $content = $this->getRawTemplateData();
909 //* DEBUG: */ echo __METHOD__.': content before='.strlen($content).' ('.md5($content).')<br />\n';
911 // Walk through all variables
912 foreach ($this->varStack['general'] as $currEntry) {
913 //* DEBUG: */ echo __METHOD__.': name='.$currEntry['name'].', value=<pre>'.htmlentities($currEntry['value']).'</pre>\n';
914 // Replace all [$var] or {?$var?} with the content
915 // @TODO Old behaviour, will become obsolete!
916 $content = str_replace("\$content[".$currEntry['name'].']', $currEntry['value'], $content);
918 // @TODO Yet another old way
919 $content = str_replace('['.$currEntry['name'].']', $currEntry['value'], $content);
922 $content = str_replace('{?'.$currEntry['name'].'?}', $currEntry['value'], $content);
925 //* DEBUG: */ echo __METHOD__.': content after='.strlen($content).' ('.md5($content).')<br />\n';
927 // Set the content back
928 $this->setRawTemplateData($content);
932 * Load a specified web template into the engine
934 * @param $template The web template we shall load which is located in
938 public function loadWebTemplate ($template) {
940 $this->setTemplateType($this->getConfigInstance()->getConfigEntry('web_template_type'));
942 // Load the special template
943 $this->loadTemplate($template);
947 * Assign a given congfiguration variable with a value
949 * @param $var The configuration variable we want to assign
952 public function assignConfigVariable ($var) {
953 // Sweet and simple...
954 //* DEBUG: */ echo __METHOD__.':var={$var}<br />\n';
955 $this->varStack['config'][$var] = $this->getConfigInstance()->getConfigEntry($var);
959 * Load a specified email template into the engine
961 * @param $template The email template we shall load which is located in
962 * 'emails' by default
965 * @see See loadCodeTemplate()
967 public function loadEmailTemplate ($template) {
969 $this->setTemplateType($this->getConfigInstance()->getConfigEntry('email_template_type'));
971 // Load the special template
972 $this->loadTemplate($template);
976 * Load a specified code template into the engine
978 * @param $template The code template we shall load which is
979 * located in 'code' by default
982 public function loadCodeTemplate ($template) {
984 $this->setTemplateType($this->getConfigInstance()->getConfigEntry('code_template_type'));
986 // Load the special template
987 $this->loadTemplate($template);
991 * Compiles configuration place-holders in all variables. This 'walks'
992 * through the variable stack 'general'. It interprets all values from that
993 * variables as configuration entries after compiling them.
997 public final function compileConfigInVariables () {
998 // Iterate through all general variables
999 foreach ($this->varStack['general'] as $idx=>$currVariable) {
1000 // Compile the value
1001 $value = $this->compileRawCode($this->readVariable($currVariable['name']), true);
1003 // Remove it from stack
1004 unset($this->varStack['general'][$idx]);
1006 // Re-assign the variable
1007 $this->assignConfigVariable($value);
1012 * Compile all variables by inserting their respective values
1015 * @todo Make this code some nicer...
1017 public final function compileVariables () {
1018 // Initialize the $content array
1019 $validVar = $this->getConfigInstance()->getConfigEntry('tpl_valid_var');
1022 // Iterate through all general variables
1023 foreach ($this->varStack['general'] as $currVariable) {
1024 // Transfer it's name/value combination to the $content array
1025 //* DEBUG: */ echo $currVariable['name'].'=<pre>'.htmlentities($currVariable['value']).'</pre>\n';
1026 $dummy[$currVariable['name']] = $currVariable['value'];
1029 // Set the new variable (don't remove the second dollar!)
1030 $$validVar = $dummy;
1032 // Prepare all configuration variables
1034 if (isset($this->varStack['config'])) {
1035 $config = $this->varStack['config'];
1038 // Remove some variables
1040 unset($currVariable);
1042 // Run the compilation three times to get content from helper classes in
1045 // Finalize the compilation of template variables
1046 $this->finalizeVariableCompilation();
1048 // Prepare the eval() command for comiling the template
1049 $eval = sprintf("\$result = \"%s\";",
1050 addslashes($this->getRawTemplateData())
1053 // This loop does remove the backslashes (\) in PHP parameters
1054 while (strpos($eval, $this->codeBegin) !== false) {
1055 // Get left part before "<?"
1056 $evalLeft = substr($eval, 0, strpos($eval, $this->codeBegin));
1058 // Get all from right of "<?"
1059 $evalRight = substr($eval, (strpos($eval, $this->codeBegin) + 5));
1061 // Cut middle part out and remove escapes
1062 $evalMiddle = trim(substr($evalRight, 0, strpos($evalRight, $this->codeEnd)));
1063 $evalMiddle = stripslashes($evalMiddle);
1065 // Remove the middle part from right one
1066 $evalRight = substr($evalRight, (strpos($evalRight, $this->codeEnd) + 2));
1068 // And put all together
1069 $eval = sprintf("%s<%%php %s %%>%s", $evalLeft, $evalMiddle, $evalRight);
1072 // Prepare PHP code for eval() command
1073 $eval = str_replace(
1082 // Run the constructed command. This will "compile" all variables in
1085 // Goes something wrong?
1086 if ((!isset($result)) || (empty($result))) {
1087 // Output eval command
1088 $this->debugOutput(sprintf("Failed eval() code: <pre>%s</pre>", $this->markupCode($eval, true)), true);
1090 // Output backtrace here
1091 $this->debugBackTrace();
1094 // Set raw template data
1095 $this->setRawTemplateData($result);
1099 // Final variable assignment
1100 $this->finalizeVariableCompilation();
1102 // Set the new content
1103 $this->setCompiledData($this->getRawTemplateData());
1107 * Compile all required templates into the current loaded one
1110 * @throws UnexpectedTemplateTypeException If the template type is
1112 * @throws InvalidArrayCountException If an unexpected array
1113 * count has been found
1115 public function compileTemplate () {
1116 // We will only work with template type "code" from configuration
1117 if ($this->getTemplateType() != $this->getConfigInstance()->getConfigEntry('code_template_type')) {
1119 throw new UnexpectedTemplateTypeException(array($this, $this->getTemplateType(), $this->getConfigInstance()->getConfigEntry('code_template_type')), self::EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED);
1122 // Get the raw data.
1123 $rawData = $this->getRawTemplateData();
1125 // Remove double spaces and trim leading/trailing spaces
1126 $rawData = trim(str_replace(' ', ' ', $rawData));
1128 // Search for raw variables
1129 $this->extractVariablesFromRawData($rawData);
1131 // Search for code-tags which are {? ?}
1132 preg_match_all($this->regExpCodeTags, $rawData, $templateMatches);
1134 // Analyze the matches array
1135 if ((is_array($templateMatches)) && (count($templateMatches) == 4) && (count($templateMatches[0]) > 0)) {
1136 // Entries are found:
1138 // The main analysis
1139 $this->analyzeTemplate($templateMatches);
1141 // Compile raw template data
1142 $this->compileRawTemplateData($templateMatches);
1144 // Are there some raw templates left for loading?
1145 $this->loadExtraRawTemplates();
1147 // Are some raw templates found and loaded?
1148 if (count($this->rawTemplates) > 0) {
1150 // Insert all raw templates
1151 $this->insertRawTemplates();
1153 // Remove the raw template content as well
1154 $this->setRawTemplateData('');
1158 } // END - if($templateMatches ...
1162 * A old deprecated method
1166 * @see BaseTemplateEngine::transferToResponse
1168 public function output () {
1169 // Check which type of template we have
1170 switch ($this->getTemplateType()) {
1171 case 'html': // Raw HTML templates can be send to the output buffer
1173 $this->getWebOutputInstance()->output($this->getCompiledData());
1176 default: // Unknown type found
1177 // Construct message
1178 $msg = sprintf("[%s->%s] Unknown/unsupported template type <span class=\"data\">%s</span> detected.",
1179 $this->__toString(),
1181 $this->getTemplateType()
1184 // Write the problem to the world...
1185 $this->debugOutput($msg);
1191 * Loads a given view helper (by name)
1193 * @param $helperName The helper's name
1196 protected function loadViewHelper ($helperName) {
1197 // Make first character upper case, rest low
1198 $helperName = $this->convertToClassName($helperName);
1200 // Is this view helper loaded?
1201 if (!isset($this->helpers[$helperName])) {
1202 // Create a class name
1203 $className = "{$helperName}ViewHelper";
1205 // Generate new instance
1206 $this->helpers[$helperName] = ObjectFactory::createObjectByName($className);
1209 // Return the requested instance
1210 return $this->helpers[$helperName];
1214 * Assigns the last loaded raw template content with a given variable
1216 * @param $templateName Name of the template we want to assign
1217 * @param $variableName Name of the variable we want to assign
1220 public function assignTemplateWithVariable ($templateName, $variableName) {
1221 // Get the content from last loaded raw template
1222 $content = $this->getRawTemplateData();
1224 // Assign the variable
1225 $this->assignVariable($variableName, $content);
1227 // Purge raw content
1228 $this->setRawTemplateData('');
1232 * Transfers the content of this template engine to a given response instance
1234 * @param $responseInstance An instance of a response class
1237 public function transferToResponse (Responseable $responseInstance) {
1238 // Get the content and set it in response class
1239 $responseInstance->writeToBody($this->getCompiledData());
1243 * Assigns all the application data with template variables
1245 * @param $appInstance A manageable application instance
1248 public function assignApplicationData (ManageableApplication $appInstance) {
1249 // Get long name and assign it
1250 $this->assignVariable('app_full_name' , $appInstance->getAppName());
1252 // Get short name and assign it
1253 $this->assignVariable('app_short_name', $appInstance->getAppShortName());
1255 // Get version number and assign it
1256 $this->assignVariable('app_version' , $appInstance->getAppVersion());
1258 // Assign extra application-depending data
1259 $appInstance->assignExtraTemplateData($this);
1263 * "Compiles" a variable by replacing {?var?} with it's content
1265 * @param $rawCode Raw code to compile
1266 * @param $setMatchAsCode Sets $match if readVariable() returns empty result
1267 * @return $rawCode Compile code with inserted variable value
1269 public function compileRawCode ($rawCode, $setMatchAsCode=false) {
1270 // Find the variables
1271 //* DEBUG: */ echo __METHOD__.":rawCode=<pre>".htmlentities($rawCode)."</pre>\n";
1272 preg_match_all($this->regExpVarValue, $rawCode, $varMatches);
1274 // Compile all variables
1275 //* DEBUG: */ echo __METHOD__.":<pre>".print_r($varMatches, true)."</pre>\n";
1276 foreach ($varMatches[0] as $match) {
1277 // Add variable tags around it
1278 $varCode = '{?' . $match . '?}';
1280 // Is the variable found in code? (safes some calls)
1281 if (strpos($rawCode, $varCode) !== false) {
1282 // Replace the variable with it's value, if found
1283 $value = $this->readVariable($match);
1284 //* DEBUG: */ echo __METHOD__.": match=".$match.",value[".gettype($value)."]=".$value."<br />\n";
1285 if (($setMatchAsCode === true) && (is_null($value))) {
1287 $rawCode = str_replace($varCode, $match, $rawCode);
1290 $rawCode = str_replace($varCode, $value, $rawCode);
1295 // Return the compiled data
1296 //* DEBUG: */ echo __METHOD__.":rawCode=<pre>".htmlentities($rawCode)."</pre>\n";
1301 * Getter for variable group array
1303 * @return $vargroups All variable groups
1305 public final function getVariableGroups () {
1306 return $this->varGroups;
1310 * Renames a variable in code and in stack
1312 * @param $oldName Old name of variable
1313 * @param $newName New name of variable
1316 public function renameVariable ($oldName, $newName) {
1317 //* DEBUG: */ echo __METHOD__.": oldName={$oldName}, newName={$newName}<br />\n";
1318 // Get raw template code
1319 $rawData = $this->getRawTemplateData();
1322 $rawData = str_replace($oldName, $newName, $rawData);
1324 // Set the code back
1325 $this->setRawTemplateData($rawData);
1329 * Renders the given XML content
1331 * @param $content Valid XML content or if not set the current loaded raw content
1333 * @throws XmlParserException If an XML error was found
1335 public function renderXmlContent ($content = null) {
1336 // Is the content set?
1337 if (is_null($content)) {
1338 // Get current content
1339 $content = $this->getRawTemplateData();
1342 // Get a XmlParser instance
1343 $parserInstance = ObjectFactory::createObjectByConfiguredName('xml_parser_class', array($this));
1345 // Parse the XML document
1346 $parserInstance->parseXmlContent($content);
1350 * Enables or disables language support
1352 * @param $languageSupport New language support setting
1355 public final function enableLanguageSupport ($languageSupport = true) {
1356 $this->languageSupport = (bool) $languageSupport;
1360 * Checks wether language support is enabled
1362 * @return $languageSupport Wether language support is enabled or disabled
1364 public final function isLanguageSupportEnabled () {
1365 return $this->languageSupport;