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<?php |
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namespace WPEmerge\View; |
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use WPEmerge\Exceptions\ViewException; |
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/** |
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* Render view files with php. |
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*/ |
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class PhpViewEngine implements ViewEngineInterface { |
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/** |
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* {@inheritDoc} |
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*/ |
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public function exists( $view ) { |
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$file = $this->resolveFilepath( $view ); |
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return strlen( $file ) > 0; |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function canonical( $view ) { |
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return $this->resolveFilepath( $view ); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function make( $views ) { |
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foreach ( $views as $view ) { |
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if ( $this->exists( $view ) ) { |
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$filepath = $this->resolveFilepath( $view ); |
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return $this->makeView( $view, $filepath ); |
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} |
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} |
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throw new ViewException( 'View not found for "' . implode( ', ', $views ) . '"' ); |
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} |
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/** |
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* Create a view instance. |
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* |
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* @param string $name |
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* @param string $filepath |
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* @return ViewInterface |
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*/ |
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protected function makeView( $name, $filepath ) { |
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$view = (new PhpView()) |
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->setName( $name ) |
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->setFilepath( $filepath ); |
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$layout = $this->getViewLayout( $view ); |
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if ( $layout !== null ) { |
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$view->setLayout( $layout ); |
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} |
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return $view; |
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} |
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/** |
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* Create a view instance for the given view's layout header, if any. |
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* |
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* @param PhpView $view |
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* @return ViewInterface |
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*/ |
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protected function getViewLayout( PhpView $view ) { |
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$layout_headers = array_filter( get_file_data( |
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$view->getFilepath(), |
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['App Layout'] |
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) ); |
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if ( empty( $layout_headers ) ) { |
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return null; |
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} |
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$layout_file = trim( $layout_headers[0] ); |
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if ( ! $this->exists( $layout_file ) ) { |
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throw new ViewException( 'View layout not found for "' . $layout_file . '"' ); |
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} |
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return $this->makeView( $this->canonical( $layout_file ), $this->resolveFilepath( $layout_file ) ); |
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} |
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/** |
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* Resolve a view name to an absolute filepath. |
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* |
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* @param string $view |
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* @return string |
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*/ |
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protected function resolveFilepath( $view ) { |
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$file = locate_template( $view, false ); |
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if ( ! $file ) { |
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// locate_template failed to find the view - try adding a .php extension. |
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$file = locate_template( $view . '.php', false ); |
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} |
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if ( ! $file ) { |
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// locate_template failed to find the view - test if a valid absolute path was passed. |
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$file = $this->resolveFilepathFromFilesystem( $view ); |
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} |
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if ( $file ) { |
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$file = realpath( $file ); |
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} |
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return $file; |
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} |
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/** |
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* Resolve a view if it exists on the filesystem. |
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* |
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* @param string $view |
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* @return string |
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*/ |
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protected function resolveFilepathFromFilesystem( $view ) { |
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return file_exists( $view ) ? $view : ''; |
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} |
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} |
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htmlburger /
wpemerge
