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<?php |
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namespace ntentan\honam; |
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use ntentan\honam\exceptions\TemplateResolutionException; |
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use ntentan\utils\Filesystem; |
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class TemplateFileResolver |
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{ |
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/** |
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* The array which holds the template path heirachy. |
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* |
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* @var array<string> |
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*/ |
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private $pathHierarchy = array(); |
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public function getPathHierarchy() : array |
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{ |
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return $this->pathHierarchy; |
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} |
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public function setPathHierarchy(array $pathHierarchy) : void |
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{ |
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$this->pathHierarchy = $pathHierarchy; |
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} |
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/** |
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* Append a directory to the end of the template path heirachy. |
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* |
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* @param string $path |
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*/ |
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public function appendToPathHierarchy($path) |
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{ |
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$this->pathHierarchy[] = $path; |
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} |
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/** |
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* Prepend a directory to the beginning of the template path heirachy. |
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* |
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* @param string $path |
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*/ |
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public function prependToPathHierarchy($path) |
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{ |
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array_unshift($this->pathHierarchy, $path); |
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} |
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private function testTemplateFile($testTemplate, $paths, $extension) |
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{ |
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$templateFile = ''; |
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foreach ($paths as $path) { |
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$newTemplateFile = "$path/$testTemplate.$extension"; |
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if (file_exists($newTemplateFile)) { |
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$templateFile = $newTemplateFile; |
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break; |
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} |
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} |
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return $templateFile; |
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} |
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private function testNoEngineTemplateFile($testTemplate, $paths) |
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{ |
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$templateFile = ''; |
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foreach ($paths as $path) { |
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$newTemplateFile = "$testTemplate.*"; |
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$files = array_filter( |
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iterator_to_array(Filesystem::directory($path)->getFiles(false)), |
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function($file) use($newTemplateFile) { |
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return fnmatch($newTemplateFile, basename($file)); |
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}); |
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$files = array_map(function($file) { return basename($file);}, $files); |
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if (count($files) == 1) { |
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$templateFile = $path . "/" . reset($files); |
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break; |
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} else if (count($files) > 1) { |
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$templates = implode(", ", $files); |
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throw new TemplateResolutionException("Multiple templates were resolved for the request '$testTemplate'. Please ensure that only one supported template type of the name '$testTemplate' exists in the path '$path'. Files found: $templates"); |
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} |
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} |
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return $templateFile; |
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} |
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private function searchTemplateDirectory($template, $ignoreEngine = false) |
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{ |
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$templateFile = ''; |
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$extension = ''; |
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// Split the filename on the dots. The first part before the first dot |
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// would be used to implement the file breakdown. The other parts are |
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// fused together again and appended during the evaluation of the |
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// breakdown. |
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if ($ignoreEngine) { |
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$breakDown = explode('_', $template); |
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} else { |
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$splitOnDots = explode('.', $template); |
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$breakDown = explode('_', array_shift($splitOnDots)); |
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$extension = implode(".", $splitOnDots); |
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} |
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$parts = count($breakDown); |
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for ($i = 0; $i < $parts; $i++) { |
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$testTemplate = implode("_", array_slice($breakDown, $i, count($breakDown) - $i)); |
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if ($ignoreEngine) { |
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$templateFile = $this->testNoEngineTemplateFile($testTemplate, $this->pathHierarchy); |
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} else { |
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$templateFile = $this->testTemplateFile($testTemplate, $this->pathHierarchy, $extension); |
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} |
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if ($templateFile != '') { |
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break; |
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} |
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} |
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return $templateFile; |
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} |
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/** |
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* Resolve a template file by running through all the directories in the |
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* template heirachy till a file that matches the template is found. |
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* |
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* @param string $template |
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* @return string |
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* @throws TemplateResolutionException |
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*/ |
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public function resolveTemplateFile($template) |
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{ |
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if ($template == '') { |
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throw new TemplateResolutionException("Empty template file requested"); |
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} |
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$templateFile = $this->searchTemplateDirectory($template, pathinfo($template, PATHINFO_EXTENSION) === ''); |
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if ($templateFile == null) { |
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$pathString = "[" . implode('; ', $this->pathHierarchy) . "]"; |
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throw new TemplateResolutionException( |
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"Could not find a suitable template file for the current request '{$template}'. Current template path $pathString" |
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); |
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} |
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return $templateFile; |
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} |
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} |
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ntentan /
honam
