<?php
/*
 * add mz 2014-12-30
 * Class to create one pdf file from many documents
 */
class EcmMultiPdf {
	const TEMP_DIR = "temp/EcmMultiPdf/";
	const MY_PATH = "include/ECM/EcmMultiPdf/";
	private $outputfile;
	private $documents; // is two-dimensions array, $documents[i] = array('module'=>'moduleName', 'record'=>'record_id')
	private $status;
	private $count;
	private $temp_files; // array with temponary file names
	private $s; // class strings
	function __construct($documents, $outputfile = 'multi.pdf') {
		$this->documents = $documents;
		$this->outputfile = strtolower ( substr ( $outputfile, - 4 ) ) == '.pdf' ? strtolower ( substr ( $outputfile, 0, - 4 ) ) .'_'. create_guid () . '.pdf' : $outputfile .'_'. create_guid () . '.pdf';
		$this->count = sizeof ( $this->documents );
		$this->temp_files = array ();	
		// create temp dir if not exists
		if (! is_dir ( self::TEMP_DIR ))
			mkdir ( self::TEMP_DIR );
	}
	/*
	 * Function creates pdf
	 * return:
	 * file path on succes
	 * -1: prepareDosc error
	 * -2: mergeFiles error
	 */
	public function process() {
		if (! $this->prepareDocs ())
			return - 1;
		if (! $this->mergeFiles ())
			return - 2;
		$this->deleteTempFiles ();
		return self::TEMP_DIR . $this->outputfile;
	}
	private function prepareDocs() {
		if (! is_array ( $this->documents ) || $this->count == 0)
			return false;
		
		for($i = 0; $i < $this->count; $i ++) {
			$doc = ( array ) $this->documents [$i]; // cast from object to array when it's axaj call
			if (! is_array ( $doc ) || sizeof ( $doc ) != 2 || ! $doc ['module'] || ! $doc ['record'])
				return false;
			if (! file_exists ( 'modules/' . $doc ['module'] . '/createPDF.php' ))
				return false;
			include_once 'modules/' . $doc ['module'] . '/createPDF.php';
			$generator = 'create' . substr ( $doc ['module'], 0, - 1 ) . 'Pdf';
			$filename = basename ( $generator ( $doc ['record'], 'MULTIPDF' ) );
			$this->temp_files [$i] = $filename;
		}
		return true;
	}
	private function mergeFiles() {
		include_once self::MY_PATH . 'PDFMerger.php';
		$merger = new PDFMerger ();
		$errors = array ();
		for($i = 0; $i < $this->count; $i ++) 
			if (file_exists ( self::TEMP_DIR . $this->temp_files [$i] ))
				$merger->addPDF ( self::TEMP_DIR . $this->temp_files [$i], 'all' );
			else 
				return -2;
		if (!file_put_contents ( self::TEMP_DIR . $this->outputfile, $merger->merge ( 'string', $this->outputfile ) ));
			return -2;
		return true; // file is ready
	}
	private function deleteTempFiles() {
		if (sizeof ( $this->temp_files ) == 0)
			return;
		foreach ( $this->temp_files as $f )
			unlink ( self::TEMP_DIR . $f );
	}
}
?>