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<?php |
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/** |
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* Class CustomizedPDFMerger file. |
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* |
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* @package PostNLWooCommerce\Library |
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*/ |
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|
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namespace PostNLWooCommerce\Library; |
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|
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if ( ! defined( 'ABSPATH' ) ) { |
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exit; |
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} |
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|
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use Exception; |
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use PostNLWooCommerce\Shipping_Method\Settings; |
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use PostNLWooCommerce\Utils; |
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|
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class CustomizedPDFMerger { |
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|
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/** |
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* Files to merge. |
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* |
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* @var array |
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*/ |
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private $_files; // ['form.pdf'] ["1,2,4, 5-19"] |
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|
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/** |
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* Settings class instance. |
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* |
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* @var Settings |
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*/ |
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protected $settings; |
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|
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public function __construct() { |
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$this->settings = Settings::get_instance(); |
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} |
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|
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/** |
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* Add a PDF for inclusion in the merge with a valid file path. Pages should be formatted: 1,3,6, 12-16. |
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* |
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* @param $filepath |
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* @param string $pages |
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* @param string|null $orientation |
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* |
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* @return CustomizedPDFMerger |
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* @throws Exception |
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*/ |
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public function addPDF( $filepath, $pages = 'all', $orientation = null ) { |
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if ( file_exists( $filepath ) ) { |
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if ( strtolower( $pages ) != 'all' ) { |
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$pages = $this->_rewritepages( $pages ); |
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} |
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|
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$this->_files[] = array( $filepath, $pages, $orientation ); |
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} else { |
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throw new Exception( "Could not locate PDF on '$filepath'" ); |
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} |
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|
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return $this; |
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} |
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|
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/** |
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* Merges your provided PDFs and outputs to specified location. |
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* |
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* @param string $outputmode |
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* @param string $outputpath |
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* @param string $orientation |
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* @param string $start_position |
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* |
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* @return string|bool |
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* @throws Exception |
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*/ |
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public function merge( $outputmode = 'browser', $outputpath = 'newfile.pdf', $orientation = 'A', $start_position = 'top-left' ) { |
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if ( ! isset( $this->_files ) || ! is_array( $this->_files ) ) { |
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throw new Exception( 'No PDFs to merge.' ); |
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} |
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|
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$fpdi = new PDF_Rotate(); |
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$files = array(); |
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|
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// merger operations |
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foreach ( $this->_files as $file ) { |
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$filename = $file[0]; |
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$filepages = $file[1]; |
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$fileorientation = ( ! is_null( $file[2] ) ) ? $file[2] : $orientation; |
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|
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$count = $fpdi->setSourceFile( $filename ); |
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|
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// add the pages |
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if ( $filepages == 'all' ) { |
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for ( $i = 1; $i <= $count; $i++ ) { |
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$template = $fpdi->importPage( $i ); |
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$size = $fpdi->getTemplateSize( $template ); |
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if ( $fileorientation === 'A' ) { |
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$fileorientation = ( $size['width'] > $size['height'] ) ? 'L' : 'P'; |
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} |
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|
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$files[ $filename ][] = array( |
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'template' => $template, |
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'size' => $size, |
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'orientation' => $fileorientation, |
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); |
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} |
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} else { |
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foreach ( $filepages as $page ) { |
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if ( ! $template = $fpdi->importPage( $page ) ) { |
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throw new Exception( "Could not load page '$page' in PDF '$filename'. Check that the page exists." ); |
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} |
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$size = $fpdi->getTemplateSize( $template ); |
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|
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$files[ $filename ][] = array( |
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'template' => $template, |
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'size' => $size, |
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'orientation' => $fileorientation, |
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); |
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} |
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} |
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} |
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|
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$label_number = 1; |
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$a4_size = Utils::get_paper_size( 'A4' ); |
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$a6_size = Utils::get_paper_size( 'A6' ); |
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|
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$label_format = $this->settings->get_label_format(); |
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$first_page = true; |
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$coordinate_map = array( |
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'top-left' => array( |
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1 => array( 0, 0 ), |
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2 => array( 148, 0 ), |
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3 => array( 0, 105 ), |
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4 => array( 148, 105 ), |
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), |
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'top-right' => array( |
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1 => array( 148, 0 ), |
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2 => array( 0, 105 ), |
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3 => array( 148, 105 ), |
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4 => array( 148, 0 ), // this will be on a new page |
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), |
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'bottom-left' => array( |
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1 => array( 0, 105 ), |
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2 => array( 148, 105 ), |
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3 => array( 0, 105 ), // this will be on a new page |
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4 => array( 148, 0 ), // this will be on a new page |
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), |
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'bottom-right' => array( |
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1 => array( 148, 105 ), |
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2 => array( 0, 0 ), // this will be on a new page |
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3 => array( 148, 0 ), // this will be on a new page |
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4 => array( 0, 105 ), // this will be on a new page |
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), |
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); |
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|
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$new_page_condition_map = array( |
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'top-left' => 4, |
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'top-right' => 3, |
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'bottom-left' => 2, |
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'bottom-right' => 1, |
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); |
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|
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foreach ( $files as $filename => $file_templates ) { |
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foreach ( $file_templates as $file_template ) { |
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$rotation_needed = false; |
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$tolerance = 5; // Tolerance in mm for A6 only. |
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$file_width = intval( $file_template['size']['width'] ); |
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$file_height = intval( $file_template['size']['height'] ); |
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$file_orientation = $file_template['size']['orientation']; |
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$is_cn23 = ( stripos( $filename, '-cn23-' ) !== false ); |
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|
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// Check if the file matches A6 dimensions (vertical or horizontal) within tolerance. |
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$isA6 = ( abs( $file_width - intval( $a6_size['height'] ) ) <= $tolerance && |
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abs( $file_height - intval( $a6_size['width'] ) ) <= $tolerance ) |
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|| ( abs( $file_width - intval( $a6_size['width'] ) ) <= $tolerance && |
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abs( $file_height - intval( $a6_size['height'] ) ) <= $tolerance ); |
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|
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if ( 'A6' === $label_format || $is_cn23 || ! $isA6 ) { |
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$fpdi->AddPage( |
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$file_orientation, |
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array( |
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$file_width, |
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$file_height, |
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) |
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); |
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$fpdi->useTemplate( $file_template['template'] ); |
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$label_number = 1; |
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continue; |
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} |
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|
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if ( |
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$file_width <= ( intval( $a6_size['height'] ) + $tolerance ) && |
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$file_height <= ( intval( $a6_size['width'] ) + $tolerance ) |
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) { |
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$rotation_needed = true; |
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} |
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|
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$new_page_condition = $new_page_condition_map[ $start_position ]; |
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|
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if ( 1 === $label_number % $new_page_condition || $start_position == 'bottom-right' ) { |
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$fpdi->AddPage( |
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'L', |
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array( |
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$a4_size['width'], |
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$a4_size['height'], |
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) |
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); |
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$label_number = 1; |
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|
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if ( $first_page ) { |
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// If it's the first page, use the given start_position. |
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$first_page = false; |
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} else { |
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// For other pages, always start from top-left. |
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$start_position = 'top-left'; |
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} |
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} |
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|
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$coords = $coordinate_map[ $start_position ][ $label_number ]; |
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|
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// Scale A6 PDF. |
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if ( $rotation_needed ) { |
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$scale_x = $a6_size['width'] / $file_height; |
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$scale_y = $a6_size['height'] / $file_width; |
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} else { |
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$scale_x = $a6_size['width'] / $file_width; |
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$scale_y = $a6_size['height'] / $file_height; |
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} |
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|
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$scale = min( $scale_x, $scale_y ); |
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|
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if ( $rotation_needed ) { |
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$fpdi->Rotate( 90, 0, 0 ); |
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$fpdi->useTemplate( $file_template['template'], - $file_template['size']['width'] - $coords[1], $coords[0], ( $file_template['size']['width'] * $scale ), ( $file_template['size']['height'] * $scale ) ); |
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|
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$fpdi->Rotate( 0 ); // Reset rotation |
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} else { |
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// Portrait - place as is |
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$fpdi->useTemplate( $file_template['template'], $coords[0], $coords[1], ( $file_template['size']['width'] * $scale ), ( $file_template['size']['height'] * $scale ), false ); |
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} |
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|
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++$label_number; |
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} |
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} |
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|
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// output operations |
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$mode = $this->_switchmode( $outputmode ); |
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|
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if ( $mode == 'S' ) { |
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return $fpdi->Output( $outputpath, 'S' ); |
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} elseif ( $fpdi->Output( $outputpath, $mode ) == '' ) { |
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return true; |
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} else { |
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throw new Exception( "Error outputting PDF to '$outputmode'." ); |
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|
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return false; |
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} |
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} |
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|
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/** |
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* FPDI uses single characters for specifying the output location. Change our more descriptive string into proper format. |
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* |
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* @param $mode |
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* |
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* @return string Character |
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*/ |
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private function _switchmode( $mode ) { |
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switch ( strtolower( $mode ) ) { |
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case 'download': |
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return 'D'; |
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break; |
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case 'file': |
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return 'F'; |
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break; |
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case 'string': |
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return 'S'; |
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break; |
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default: |
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return 'I'; |
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break; |
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} |
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} |
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|
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/** |
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* Takes our provided pages in the form of 1,3,4,16-50 and creates an array of all pages |
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* |
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* @param $pages |
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* |
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* @return array |
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* @throws Exception |
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*/ |
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private function _rewritepages( $pages ) { |
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$pages = str_replace( ' ', '', $pages ); |
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$part = explode( ',', $pages ); |
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|
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// parse hyphens |
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foreach ( $part as $i ) { |
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$ind = explode( '-', $i ); |
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|
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if ( count( $ind ) == 2 ) { |
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$x = $ind[0]; // start page |
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$y = $ind[1]; // end page |
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|
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if ( $x > $y ) { |
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throw new Exception( "Starting page, '$x' is greater than ending page '$y'." ); |
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|
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return false; |
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} |
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|
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// add middle pages |
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while ( $x <= $y ) { |
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$newpages[] = (int) $x; |
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++$x; |
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} |
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} else { |
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$newpages[] = (int) $ind[0]; |
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} |
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} |
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|
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return $newpages; |
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} |
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} |
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|
