class-print.php

<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class WooCommerceNFePrint extends WooCommerceNFe {

	//Files folder path
	private $files_folder;

	/**
	 * Constructor
	 * 
	 * @return void
	 */
	public function __construct(){

		//If Temp directory is not defined, create a folder to save the files
		if (defined('WP_TEMP_DIR')) {
			
			$this->files_folder = WP_TEMP_DIR;

		}
		else {

			$this->files_folder = dirname(__FILE__) . '/danfes_pdf';
			wp_mkdir_p($this->files_folder);

		}

		

	}

	/**
	 * Print nfe pdf
	 * 
	 * @param array $order_ids
	 * @param string $type Danfe type (normal, simplificada, etiqueta)
	 *
	 * @return boolean
	 */
	public function print( $order_ids = array(), $type = 'normal' ){

		$data = array();

		foreach ($order_ids as $order_id) {

			//Get order nfe data
			$order = wc_get_order( $order_id );
			$order_nfe_data = get_post_meta( $order->id,  'nfe', true );

			if(!$order_nfe_data){
				continue;
			} 

			//Use the last nfe issued
			$nf = end($order_nfe_data);
			if ($nf['modelo'] == 'lote_rps' || ($nf['modelo'] == 'nfse' && ($type != 'normal' || empty($nf['pdf_rps'])))) continue;

			//Set Danfe's url 
			$item = array('chave' => $nf['chave_acesso']);
			if ((isset($nf['url_danfe']) || trim($nf['url_danfe']) == '') && $nf['chave_acesso']) {
				$nf['url_danfe'] = 'https://nfe.webmaniabr.com/danfe/'.$nf['chave_acesso'].'/';
			}
			if ($type == 'normal') {
				$item['url'] = ($nf['modelo'] == 'nfse') ? $nf['pdf_rps'] : $nf['url_danfe'];
			}
			else if ($type == 'simplificada') {
				$item['url'] = ($nf['url_danfe_simplificada']) ? $nf['url_danfe_simplificada'] : str_replace('/danfe/', '/danfe/simples/', $nf['url_danfe']);
			}
			else if ($type == 'etiqueta') {
				$item['url'] = ($nf['url_danfe_etiqueta']) ? $nf['url_danfe_etiqueta'] : str_replace('/danfe/', '/danfe/etiqueta/', $nf['url_danfe']);
			}
			
			$data[] = $item;

		}		

		//Creates pdf of selected orders nfe
		$result = (!empty($data)) ? $this->createPDF($data) : false;

		if ($result["result"] == true){

			$temp_dir = str_replace(ABSPATH, '', $this->files_folder);
			$link_pdf = get_site_url().'/'.$temp_dir.'/'.$result["file"].".pdf";
			
			$this->add_success( "Arquivo de impressão gerado com sucesso. <a href='$link_pdf' target='_blank'>Clique aqui</a> para acessá-lo." );

		} else {

			$this->add_error( "Erro ao gerar arquivo de impressão." );

		}

		return $result;

	}

	/**
	 * Create pdf with DANFEs
	 * 
	 * @param array $data Danfe urls
	 *
	 * @return array Result of merging files (bool) and pdf's url
	 */
	private function createPDF($data){

		$pdf = new PDFMerger();

		foreach ($data as $item) {

			try {
				$content = $this->curl_get_file_contents($item['url']);
				if ($content && (strpos($content, '%PDF-') !== false && strpos($content, '%%EOF') !== false)) {
					file_put_contents("{$this->files_folder}/{$item['chave']}.pdf", $content);
					$pdf->addPDF("{$this->files_folder}/{$item['chave']}.pdf", 'all');
				}
			} catch (Exception $e) {
				continue;
			}

		}

		$filename = time()."-".random_int(1, 10000000000);

		try {
			$result = $pdf->merge('file', "{$this->files_folder}/{$filename}.pdf");
			return array("result" => $result, "file" => $filename);
		} catch (Exception $e) {
			return array("result" => false, "file" => $filename);
		}
	}

	/**
	 * Get file content from URL using curl
	 * 
	 * @param string $url
	 * @return mixed
	 */
	public static function curl_get_file_contents($url) {

		$headers = [
			'Authorization: Bearer ' . get_option('wc_settings_woocommercenfe_bearer_access_token'),
			'X-Access-Token: ' . get_option('wc_settings_woocommercenfe_access_token'),
			'X-Access-Token-Secret: ' . get_option('wc_settings_woocommercenfe_access_token_secret'),
			'X-Consumer-Key: ' . get_option('wc_settings_woocommercenfe_consumer_key'),
			'X-Consumer-Secret: ' . get_option('wc_settings_woocommercenfe_consumer_secret')
		];

		$c = curl_init();

		curl_setopt($c, CURLOPT_URL, $url);
		curl_setopt($c, CURLOPT_HTTPGET, true);
		curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($c, CURLOPT_HTTPHEADER, $headers);

		$contents = curl_exec($c);
		
		curl_close($c);

		if(strpos($contents, 'error') !== false) return false;

		return $contents ?? false;
	}
}