3 * A generic template engine
5 * @author Roland Haeder <webmaster@ship-simu.org>
7 * @copyright Copyright(c) 2007, 2008 Roland Haeder, this is free software
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 $basePath = "";
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 $basePath and language code for compiled code-templates
50 private $compileOutputPath = "templates/_compiled";
53 * The raw (maybe uncompiled) template
55 private $rawTemplateData = "";
58 * Template data with compiled-in variables
60 private $compiledData = "";
63 * The last loaded template's FQFN for debugging the engine
65 private $lastTemplate = "";
68 * The variable stack for the templates
70 private $varStack = array();
73 * Configuration variables in a simple array
75 private $configVariables = 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();
124 // Exception codes for the template engine
125 const EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED = 0x200;
126 const EXCEPTION_TEMPLATE_CONTAINS_INVALID_VAR = 0x201;
127 const EXCEPTION_INVALID_VIEW_HELPER = 0x202;
130 * Protected constructor
132 * @param $className Name of the class
135 protected function __construct ($className) {
136 // Call parent constructor
137 parent::__construct($className);
140 $this->removeNumberFormaters();
141 $this->removeSystemArray();
145 * Search for a variable in the stack
147 * @param $var The variable we are looking for
148 * @return $idx FALSE means not found, >=0 means found on a specific index
150 private function isVariableAlreadySet ($var) {
151 // First everything is not found
154 // Is the group there?
155 if (isset($this->varStack[$this->currGroup])) {
157 foreach ($this->varStack[$this->currGroup] as $idx=>$currEntry) {
158 // Is the entry found?
159 if ($currEntry['name'] == $var) {
167 // Return the current position
172 * Return a content of a variable or null if not found
174 * @param $var The variable we are looking for
175 * @return $content Content of the variable or null if not found
177 private function readVariable ($var) {
178 // First everything is not found
181 // Get variable index
182 $found = $this->isVariableAlreadySet($var);
184 // Is the variable found?
185 if ($found !== false) {
187 $found = $this->varStack[$this->currGroup][$found]['value'];
190 //* DEBUG: */ echo __METHOD__.": group=".$this->currGroup.",var=".$var.", found=".$found."<br />\n";
192 // Return the current position
197 * Add a variable to the stack
199 * @param $var The variable we are looking for
200 * @param $value The value we want to store in the variable
203 private function addVariable ($var, $value) {
204 // Set general variable group
205 $this->setVariableGroup("general");
207 // Add it to the stack
208 $this->addGroupVariable($var, $value);
212 * Returns all variables of current group or empty array
214 * @return $result Wether array of found variables or empty array
216 private function readCurrentGroup () {
217 // Default is not found
220 // Is the group there?
221 if (isset($this->varStack[$this->currGroup])) {
223 $result = $this->varStack[$this->currGroup];
231 * Settter for variable group
233 * @param $groupName Name of variable group
234 * @param $add Wether add this group
237 public function setVariableGroup ($groupName, $add = true) {
239 //* DEBIG: */ echo __METHOD__.": currGroup=".$groupName."<br />\n";
240 $this->currGroup = $groupName;
242 // Skip group "general"
243 if (($groupName != "general") && ($add === true)) {
244 $this->varGroups[$groupName] = "OK";
250 * Adds a variable to current group
252 * @param $var Variable to set
253 * @param $value Value to store in variable
256 public function addGroupVariable ($var, $value) {
257 //* DEBUG: */ echo __METHOD__.": group=".$this->currGroup.", var=".$var.", value=".$value."<br />\n";
259 // Get current variables in group
260 $currVars = $this->readCurrentGroup();
262 // Append our variable
268 // Add it to the stack
269 $this->varStack[$this->currGroup] = $currVars;
273 * Modify an entry on the stack
275 * @param $var The variable we are looking for
276 * @param $value The value we want to store in the variable
279 private function modifyVariable ($var, $value) {
280 // Get index for variable
281 $idx = $this->isVariableAlreadySet($var);
283 // Is the variable set?
284 if ($idx !== false) {
286 $this->varStack[$this->currGroup][$idx]['value'] = $value;
291 * Setter for template type. Only "html", "emails" and "compiled" should
294 * @param $templateType The current template's type
297 private final function setTemplateType ($templateType) {
299 $templateType = (string) $templateType;
301 // And set it (only 2 letters)
302 $this->templateType = $templateType;
306 * Setter for the last loaded template's FQFN
308 * @param $template The last loaded template
311 private final function setLastTemplate ($template) {
313 $template = (string) $template;
314 $this->lastTemplate = $template;
318 * Getter for the last loaded template's FQFN
320 * @return $template The last loaded template
322 private final function getLastTemplate () {
323 return $this->lastTemplate;
327 * Setter for base path
329 * @param $basePath The local base path for all templates
332 public final function setBasePath ($basePath) {
334 $basePath = (string) $basePath;
337 $this->basePath = $basePath;
341 * Getter for base path
343 * @return $basePath The local base path for all templates
345 public final function getBasePath () {
347 return $this->basePath;
351 * Setter for template extension
353 * @param $templateExtension The file extension for all uncompiled
357 public final function setRawTemplateExtension ($templateExtension) {
359 $templateExtension = (string) $templateExtension;
362 $this->templateExtension = $templateExtension;
366 * Setter for code template extension
368 * @param $codeExtension The file extension for all uncompiled
372 public final function setCodeTemplateExtension ($codeExtension) {
374 $codeExtension = (string) $codeExtension;
377 $this->codeExtension = $codeExtension;
381 * Getter for template extension
383 * @return $templateExtension The file extension for all uncompiled
386 public final function getRawTemplateExtension () {
388 return $this->templateExtension;
392 * Getter for code-template extension
394 * @return $codeExtension The file extension for all code-
397 public final function getCodeTemplateExtension () {
399 return $this->codeExtension;
403 * Setter for path of compiled templates
405 * @param $compileOutputPath The local base path for all compiled
409 public final function setCompileOutputPath ($compileOutputPath) {
411 $compileOutputPath = (string) $compileOutputPath;
414 $this->compileOutputPath = $compileOutputPath;
418 * Getter for template type
420 * @return $templateType The current template's type
422 public final function getTemplateType () {
423 return $this->templateType;
427 * Assign (add) a given variable with a value
429 * @param $var The variable we are looking for
430 * @param $value The value we want to store in the variable
432 * @throws EmptyVariableException If the variable name is left empty
434 public final function assignVariable ($var, $value) {
435 // Trim spaces of variable name
438 // Empty variable found?
440 // Throw an exception
441 throw new EmptyVariableException(array($this, 'var'), self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
444 // First search for the variable if it was already added
445 $idx = $this->isVariableAlreadySet($var);
448 if ($idx === false) {
449 // Add it to the stack
450 //* DEBUG: */ echo "ADD: ".$var."<br />\n";
451 $this->addVariable($var, $value);
452 } elseif (!empty($value)) {
453 // Modify the stack entry
454 //* DEBUG: */ echo "MOD: ".$var."<br />\n";
455 $this->modifyVariable($var, $value);
460 * Removes a given variable
462 * @param $var The variable we are looking for
465 public final function removeVariable ($var) {
466 // First search for the variable if it was already added
467 $idx = $this->isVariableAlreadySet($var);
470 if ($idx !== false) {
471 // Remove this variable
472 $this->varStack->offsetUnset($idx);
477 * Private setter for raw template data
479 * @param $rawTemplateData The raw data from the template
482 private final function setRawTemplateData ($rawTemplateData) {
484 $rawTemplateData = (string) $rawTemplateData;
486 // And store it in this class
487 $this->rawTemplateData = $rawTemplateData;
491 * Private setter for compiled templates
495 private final function setCompiledData ($compiledData) {
497 $compiledData = (string) $compiledData;
499 // And store it in this class
500 $this->compiledData = $compiledData;
504 * Private loader for all template types
506 * @param $template The template we shall load
509 private function loadTemplate ($template) {
511 $template = (string) $template;
513 // Get extension for the template
514 $ext = $this->getRawTemplateExtension();
516 // If we shall load a code-template we need to switch the file extension
517 if ($this->getTemplateType() == $this->getConfigInstance()->readConfig('code_template_type')) {
518 // Switch over to the code-template extension
519 $ext = $this->getCodeTemplateExtension();
522 // Construct the FQFN for the template by honoring the current language
523 $fqfn = sprintf("%s%s/%s/%s%s",
524 $this->getBasePath(),
525 $this->getLanguageInstance()->getLanguageCode(),
526 $this->getTemplateType(),
531 // Load the raw template data
532 $this->loadRawTemplateData($fqfn);
536 * A private loader for raw template names
538 * @param $fqfn The full-qualified file name for a template
540 * @throws NullPointerException If $inputInstance is null
541 * @throws NoObjectException If $inputInstance is not an object
542 * @throws MissingMethodException If $inputInstance is missing a
545 private function loadRawTemplateData ($fqfn) {
546 // Get a input/output instance from the middleware
547 $ioInstance = $this->getFileIoInstance();
549 // Validate the instance
550 if (is_null($ioInstance)) {
552 throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
553 } elseif (!is_object($ioInstance)) {
554 // Throw another exception
555 throw new NoObjectException($ioInstance, self::EXCEPTION_IS_NO_OBJECT);
556 } elseif (!method_exists($ioInstance, 'loadFileContents')) {
557 // Throw yet another exception
558 throw new MissingMethodException(array($ioInstance, 'loadFileContents'), self::EXCEPTION_MISSING_METHOD);
561 // Some debug code to look on the file which is being loaded
562 //* DEBUG: */ echo __METHOD__.": FQFN=".$fqfn."<br />\n";
564 // Load the raw template
565 $rawTemplateData = $ioInstance->loadFileContents($fqfn);
567 // Store the template's contents into this class
568 $this->setRawTemplateData($rawTemplateData);
570 // Remember the template's FQFN
571 $this->setLastTemplate($fqfn);
575 * Try to assign an extracted template variable as a "content" or "config"
578 * @param $varName The variable's name (shall be content orconfig) by
580 * @param $var The variable we want to assign
582 private function assignTemplateVariable ($varName, $var) {
583 // Is it not a config variable?
584 if ($varName != "config") {
585 // Regular template variables
586 $this->assignVariable($var, "");
588 // Configuration variables
589 $this->assignConfigVariable($var);
594 * Extract variables from a given raw data stream
596 * @param $rawData The raw template data we shall analyze
599 private function extractVariablesFromRawData ($rawData) {
601 $rawData = (string) $rawData;
603 // Search for variables
604 @preg_match_all('/\$(\w+)(\[(\w+)\])?/', $rawData, $variableMatches);
606 // Did we find some variables?
607 if ((is_array($variableMatches)) && (count($variableMatches) == 4) && (count($variableMatches[0]) > 0)) {
608 // Initialize all missing variables
609 foreach ($variableMatches[3] as $key=>$var) {
611 $varName = $variableMatches[1][$key];
613 // Workarround: Do not assign empty variables
615 // Try to assign it, empty strings are being ignored
616 $this->assignTemplateVariable($varName, $var);
623 * Main analysis of the loaded template
625 * @param $templateMatches Found template place-holders, see below
628 *---------------------------------
629 * Structure of $templateMatches:
630 *---------------------------------
631 * [0] => Array - An array with all full matches
632 * [1] => Array - An array with left part (before the ":") of a match
633 * [2] => Array - An array with right part of a match including ":"
634 * [3] => Array - An array with right part of a match excluding ":"
636 private function analyzeTemplate (array $templateMatches) {
637 // Backup raw template data
638 $backup = $this->getRawTemplateData();
640 // Initialize some arrays
641 if (is_null($this->loadedRawData)) { $this->loadedRawData = array(); $this->rawTemplates = array(); }
643 // Load all requested templates
644 foreach ($templateMatches[1] as $template) {
646 // Load and compile only templates which we have not yet loaded
647 // RECURSIVE PROTECTION! BE CAREFUL HERE!
648 if ((!isset($this->loadedRawData[$template])) && (!in_array($template, $this->loadedTemplates))) {
650 // Template not found, but maybe variable assigned?
651 if ($this->isVariableAlreadySet($template) !== false) {
652 // Use that content here
653 $this->loadedRawData[$template] = $this->readVariable($template);
655 // Recursive protection:
656 $this->loadedTemplates[] = $template;
658 // Then try to search for code-templates
660 // Load the code template and remember it's contents
661 $this->loadCodeTemplate($template);
662 $this->loadedRawData[$template] = $this->getRawTemplateData();
664 // Remember this template for recursion detection
665 // RECURSIVE PROTECTION!
666 $this->loadedTemplates[] = $template;
667 } catch (FileNotFoundException $e) {
668 // Even this is not done... :/
669 $this->rawTemplates[] = $template;
670 } catch (FilePointerNotOpenedException $e) {
671 // Even this is not done... :/
672 $this->rawTemplates[] = $template;
678 // Restore the raw template data
679 $this->setRawTemplateData($backup);
683 * Compile a given raw template code and remember it for later usage
685 * @param $code The raw template code
686 * @param $template The template's name
689 private function compileCode ($code, $template) {
690 // Is this template already compiled?
691 if (in_array($template, $this->compiledTemplates)) {
696 // Remember this template being compiled
697 $this->compiledTemplates[] = $template;
699 // Compile the loaded code in five steps:
701 // 1. Backup current template data
702 $backup = $this->getRawTemplateData();
704 // 2. Set the current template's raw data as the new content
705 $this->setRawTemplateData($code);
707 // 3. Compile the template data
708 $this->compileTemplate();
710 // 4. Remember it's contents
711 $this->loadedRawData[$template] = $this->getRawTemplateData();
713 // 5. Restore the previous raw content from backup variable
714 $this->setRawTemplateData($backup);
718 * Insert all given and loaded templates by running through all loaded
719 * codes and searching for their place-holder in the main template
721 * @param $templateMatches See method analyzeTemplate()
724 private function insertAllTemplates (array $templateMatches) {
725 // Run through all loaded codes
726 foreach ($this->loadedRawData as $template=>$code) {
728 // Search for the template
729 $foundIndex = array_search($template, $templateMatches[1]);
731 // Lookup the matching template replacement
732 if (($foundIndex !== false) && (isset($templateMatches[0][$foundIndex]))) {
734 // Get the current raw template
735 $rawData = $this->getRawTemplateData();
737 // Replace the space holder with the template code
738 $rawData = str_replace($templateMatches[0][$foundIndex], $code, $rawData);
740 // Set the new raw data
741 $this->setRawTemplateData($rawData);
749 * Load all extra raw templates
753 private function loadExtraRawTemplates () {
754 // Are there some raw templates we need to load?
755 if (count($this->rawTemplates) > 0) {
756 // Try to load all raw templates
757 foreach ($this->rawTemplates as $key => $template) {
760 $this->loadWebTemplate($template);
762 // Remember it's contents
763 $this->rawTemplates[$template] = $this->getRawTemplateData();
765 // Remove it from the loader list
766 unset($this->rawTemplates[$key]);
768 // Remember this template for recursion detection
769 // RECURSIVE PROTECTION!
770 $this->loadedTemplates[] = $template;
771 } catch (FileNotFoundException $e) {
772 // This template was never found. We silently ignore it
773 unset($this->rawTemplates[$key]);
774 } catch (FilePointerNotOpenedException $e) {
775 // This template was never found. We silently ignore it
776 unset($this->rawTemplates[$key]);
783 * Assign all found template variables
785 * @param $varMatches An array full of variable/value pairs.
787 * @todo Unfinished work or don't die here.
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 die("Deeper analysis not yet implemented!");
808 } // for ($varMatches ...
811 * Compiles all loaded raw templates
813 * @param $templateMatches See method analyzeTemplate() for details
816 private function compileRawTemplateData (array $templateMatches) {
817 // Are some code-templates found which we need to compile?
818 if (count($this->loadedRawData) > 0) {
821 foreach ($this->loadedRawData as $template=>$code) {
823 // Is this template already compiled?
824 if (in_array($template, $this->compiledTemplates)) {
829 // Search for the template
830 $foundIndex = array_search($template, $templateMatches[1]);
832 // Lookup the matching variable data
833 if (($foundIndex !== false) && (isset($templateMatches[3][$foundIndex]))) {
835 // Split it up with another reg. exp. into variable=value pairs
836 preg_match_all($this->regExpVarValue, $templateMatches[3][$foundIndex], $varMatches);
838 // Assign all variables
839 $this->assignAllVariables($varMatches);
841 } // END - if (isset($templateMatches ...
843 // Compile the loaded template
844 $this->compileCode($code, $template);
846 } // END - foreach ($this->loadedRawData ...
848 // Insert all templates
849 $this->insertAllTemplates($templateMatches);
851 } // END - if (count($this->loadedRawData) ...
855 * Inserts all raw templates into their respective variables
859 private function insertRawTemplates () {
860 // Load all templates
861 foreach ($this->rawTemplates as $template=>$content) {
862 // Set the template as a variable with the content
863 $this->assignVariable($template, $content);
868 * Finalizes the compilation of all template variables
872 private function finalizeVariableCompilation () {
874 $content = $this->getRawTemplateData();
876 // Walk through all variables
877 foreach ($this->varStack['general'] as $currEntry) {
878 // Replace all [$var] or {?$var?} with the content
879 //* DEBUG: */ echo "name=".$currEntry['name'].", value=<pre>".htmlentities($currEntry['value'])."</pre>\n";
880 $content = str_replace("\$content[".$currEntry['name']."]", $currEntry['value'], $content);
881 $content = str_replace("[".$currEntry['name']."]", $currEntry['value'], $content);
882 $content = str_replace("{?".$currEntry['name']."?}", $currEntry['value'], $content);
885 // Set the content back
886 $this->setRawTemplateData($content);
890 * Getter for raw template data
892 * @return $rawTemplateData The raw data from the template
894 public final function getRawTemplateData () {
895 return $this->rawTemplateData;
899 * Getter for compiled templates
901 public final function getCompiledData () {
902 return $this->compiledData;
906 * Load a specified web template into the engine
908 * @param $template The web template we shall load which is
909 * located in "html" by default
912 public function loadWebTemplate ($template) {
914 $this->setTemplateType($this->getConfigInstance()->readConfig('web_template_type'));
916 // Load the special template
917 $this->loadTemplate($template);
921 * Assign a given congfiguration variable with a value
923 * @param $var The configuration variable we want to assign
926 public function assignConfigVariable ($var) {
927 // Sweet and simple...
928 $this->configVariables[$var] = $this->getConfigInstance()->readConfig($var);
932 * Load a specified email template into the engine
934 * @param $template The email template we shall load which is
935 * located in "emails" by default
938 public function loadEmailTemplate ($template) {
940 $this->setTemplateType($this->getConfigInstance()->readConfig('email_template_type'));
942 // Load the special template
943 $this->loadTemplate($template);
947 * Load a specified code template into the engine
949 * @param $template The code template we shall load which is
950 * located in "code" by default
953 public function loadCodeTemplate ($template) {
955 $this->setTemplateType($this->getConfigInstance()->readConfig('code_template_type'));
957 // Load the special template
958 $this->loadTemplate($template);
962 * Compile all variables by inserting their respective values
965 * @todo Make this code some nicer...
967 public final function compileVariables () {
968 // Initialize the $content array
969 $validVar = $this->getConfigInstance()->readConfig('tpl_valid_var');
972 // Iterate through all general variables
973 foreach ($this->varStack['general'] as $currVariable) {
974 // Transfer it's name/value combination to the $content array
975 //* DEBUG: */ echo $currVariable['name']."=<pre>".htmlentities($currVariable['value'])."</pre>\n";
976 $dummy[$currVariable['name']] = $currVariable['value'];
980 // Set the new variable (don't remove the second dollar !)
983 // Prepare all configuration variables
984 $config = $this->configVariables;
986 // Remove some variables
988 unset($currVariable);
990 // Run the compilation twice to get content from helper classes in
993 // Finalize the compilation of template variables
994 $this->finalizeVariableCompilation();
996 // Prepare the eval() command for comiling the template
997 $eval = sprintf("\$result = \"%s\";",
998 addslashes($this->getRawTemplateData())
1001 // This loop does remove the backslashes (\) in PHP parameters
1002 while (strpos($eval, "<?") !== false) {
1003 // Get left part before "<?"
1004 $evalLeft = substr($eval, 0, strpos($eval, "<?"));
1006 // Get all from right of "<?"
1007 $evalRight = substr($eval, (strpos($eval, "<?") + 2));
1009 // Is this a full PHP tag?
1010 if (substr(strtolower($evalRight), 0, 3) == "php") {
1011 // Remove "php" string from full PHP tag
1012 $evalRight = substr($evalRight, 3);
1015 // Cut middle part out and remove escapes
1016 $evalMiddle = trim(substr($evalRight, 0, strpos($evalRight, "?>")));
1017 $evalMiddle = stripslashes($evalMiddle);
1019 // Remove the middle part from right one
1020 $evalRight = substr($evalRight, (strpos($evalRight, "?>") + 2));
1022 // And put all together
1023 $eval = sprintf("%s<%%php %s %%>%s", $evalLeft, $evalMiddle, $evalRight);
1026 // Prepare PHP code for eval() command
1027 $evalLength = strlen($eval);
1028 $eval = str_replace(
1031 "%>", "\n\$result .= \"", $eval
1035 // Did something change?
1036 if (strlen($eval) != $evalLength) {
1037 // Run the constructed command. This will "compile" all variables in
1041 // Goes something wrong?
1042 if (!isset($result)) {
1043 // Output eval command
1044 $this->debugOutput(sprintf("Failed eval() code: <pre>%s</pre>", $this->markupCode($eval, true)), true);
1046 // Output backtrace here
1047 $this->debugBacktrace();
1050 // Set raw template data
1051 $this->setRawTemplateData($result);
1055 // Set the new content
1056 $this->setCompiledData($result);
1060 * Compile all required templates into the current loaded one
1063 * @throws UnexpectedTemplateTypeException If the template type is
1065 * @throws InvalidArrayCountException If an unexpected array
1066 * count has been found
1068 public final function compileTemplate () {
1069 // We will only work with template type "code" from configuration
1070 if ($this->getTemplateType() != $this->getConfigInstance()->readConfig('code_template_type')) {
1072 throw new UnexpectedTemplateTypeException(array($this, $this->getTemplateType(), $this->getConfigInstance()->readConfig('code_template_type')), self::EXCEPTION_TEMPLATE_TYPE_IS_UNEXPECTED);
1075 // Get the raw data.
1076 $rawData = $this->getRawTemplateData();
1078 // Remove double spaces and trim leading/trailing spaces
1079 $rawData = trim(str_replace(" ", " ", $rawData));
1081 // Search for raw variables
1082 $this->extractVariablesFromRawData($rawData);
1084 // Search for code-tags which are {? ?}
1085 preg_match_all($this->regExpCodeTags, $rawData, $templateMatches);
1087 // Analyze the matches array
1088 if ((is_array($templateMatches)) && (count($templateMatches) == 4) && (count($templateMatches[0]) > 0)) {
1089 // Entries are found:
1091 // The main analysis
1092 $this->analyzeTemplate($templateMatches);
1094 // Compile raw template data
1095 $this->compileRawTemplateData($templateMatches);
1097 // Are there some raw templates left for loading?
1098 $this->loadExtraRawTemplates();
1100 // Are some raw templates found and loaded?
1101 if (count($this->rawTemplates) > 0) {
1103 // Insert all raw templates
1104 $this->insertRawTemplates();
1106 // Remove the raw template content as well
1107 $this->setRawTemplateData("");
1111 } // END - if($templateMatches ...
1115 * Output the compiled page to the outside world. In case of web templates
1116 * this would be vaild (X)HTML code. And in case of email templates this
1117 * would store a prepared email body inside the template engine.
1121 public function output () {
1122 // Check which type of template we have
1123 switch ($this->getTemplateType()) {
1124 case "html": // Raw HTML templates can be send to the output buffer
1126 $this->getWebOutputInstance()->output($this->getCompiledData());
1129 default: // Unknown type found
1130 // Construct message
1131 $msg = sprintf("[%s->%s] Unknown/unsupported template type <strong>%s</strong> detected.",
1132 $this->__toString(),
1134 $this->getTemplateType()
1137 // Write the problem to the world...
1138 $this->debugOutput($msg);
1144 * Loads a given view helper (by name)
1146 * @param $helperName The helper's name
1148 * @throws ViewHelperNotFoundException If the given view helper was not found
1150 protected function loadViewHelper ($helperName) {
1151 // Make first character upper case, rest low
1152 $helperName = ucfirst($helperName);
1154 // Is this view helper loaded?
1155 if (!isset($this->helpers[$helperName])) {
1156 // Create a class name
1157 $className = "{$helperName}ViewHelper";
1159 // Does this class exists?
1160 if (!class_exists($className)) {
1162 throw new ViewHelperNotFoundException(array($this, $helperName), self::EXCEPTION_INVALID_VIEW_HELPER);
1165 // Generate new instance
1166 $eval = sprintf("\$this->helpers[%s] = %s::create%s();",
1176 // Return the requested instance
1177 return $this->helpers[$helperName];
1181 * Assigns the last loaded raw template content with a given variable
1183 * @param $templateName Name of the template we want to assign
1184 * @param $variableName Name of the variable we want to assign
1187 public function assignTemplateWithVariable ($templateName, $variableName) {
1188 // Get the content from last loaded raw template
1189 $content = $this->getRawTemplateData();
1191 // Assign the variable
1192 $this->assignVariable($variableName, $content);
1194 // Purge raw content
1195 $this->setRawTemplateData("");
1199 * Transfers the content of this template engine to a given response instance
1201 * @param $responseInstance An instance of a response class
1204 public function transferToResponse (Responseable $responseInstance) {
1205 // Get the content and set it in the response class
1206 $responseInstance->writeToBody($this->getCompiledData());
1210 * Assigns all the application data with template variables
1212 * @param $appInstance A manageable application instance
1215 public function assignApplicationData (ManageableApplication $appInstance) {
1216 // Get long name and assign it
1217 $this->assignVariable("app_full_name" , $appInstance->getAppName());
1219 // Get short name and assign it
1220 $this->assignVariable("app_short_name", $appInstance->getAppShortName());
1222 // Get version number and assign it
1223 $this->assignVariable("app_version" , $appInstance->getAppVersion());
1227 * "Compiles" a variable by replacing {?var?} with it's content
1229 * @param $rawCode Raw code to compile
1230 * @return $rawCode Compile code with inserted variable value
1232 public function compileRawCode ($rawCode) {
1233 // Find the variables
1234 //* DEBUG: */ echo "rawCode=<pre>".htmlentities($rawCode)."</pre>\n";
1235 preg_match_all($this->regExpVarValue, $rawCode, $varMatches);
1237 // Compile all variables
1238 //* DEBUG: */ echo "<pre>".print_r($varMatches, true)."</pre>";
1239 foreach ($varMatches[0] as $match) {
1240 // Add variable tags around it
1241 $varCode = "{?".$match."?}";
1243 // Is the variable found in code? (safes some calls)
1244 if (strpos($rawCode, $varCode) !== false) {
1245 // Replace the variable with it's value, if found
1246 //* DEBUG: */ echo __METHOD__.": match=".$match."<br />\n";
1247 $rawCode = str_replace($varCode, $this->readVariable($match), $rawCode);
1251 // Return the compiled data
1256 * Getter for variable group array
1258 * @return $vargroups All variable groups
1260 public final function getVariableGroups () {
1261 return $this->varGroups;