<?php
class lcs_db_report_csv extends lcs_db_report_base implements report_interface {
	
	protected $csv_text = '';
	const CRLF = "\r\n";
	
	public function __construct() {
	}
	
	public function report_start() {
	}

	public function report_end() {
	}

	public function header_start() {
	}

	public function header_end() {
	}

	public function header_row_start() {
	}

	public function header_row_end() {
		$this->csv_text = $this->remove_last_comma($this->csv_text);
		$this->csv_text .= self::CRLF;
	}

	public function header_cell_add($data = '', $args = []) {
		$this->csv_text .= '"'.$this->escape_filter($data).'",';
	}

	public function footer_start() {
	}

	public function footer_end() {
	}

	public function footer_row_start() {
	}

	public function footer_row_end() {
	}

	public function footer_cell_add($data = '', $args = []) {
	}

	public function data_start() {
	}

	public function data_end() {
	}

	public function data_row_start() {
	}

	public function data_row_end() {
		$this->csv_text = $this->remove_last_comma($this->csv_text);
		$this->csv_text .= self::CRLF;
	}

	public function data_cell_add($data = '', $args = []) {
		$this->csv_text .= '"'.$this->escape_filter($data).'",';
	}

	public function output_report($filename = '', $save_file = false) {
		if (empty($filename) && !empty($_POST['save_file_name'])) :
			$filename = $_POST['save_file_name'];
		endif;
		if (!$save_file && !empty($_POST['save_file'])) :
			$save_file = true;
		endif;
		if ($save_file) :
			$upload_dir = APP_UPLOAD_DIR . '/reports/';
			if (!is_dir($upload_dir)) :
				mkdir($upload_dir, 0777, true);
			endif;
			$filename = !empty($filename) ? $filename . '.csv' : 'Report.csv';
			$upload_path = $upload_dir . $filename;
			file_put_contents($upload_path, $this->csv_text);
			$_POST['email_attachment_path'] = $upload_path;
		else :
			$file = 'Report.csv';
			$content_type = 'text/csv';
			header("Content-Description: File Transfer");
			header('Content-Disposition: attachment; filename="' . $file . '"');
			header('Content-Type: '.$content_type);
			//header('Content-Transfer-Encoding: binary');
			header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
			header('Expires: 0');
			echo $this->csv_text;
		endif;
	}

	private function escape_filter($text) {
		$text = strip_tags($text);
		$text = str_replace('"', '""', $text);
		return $text;
	}

	private function remove_last_comma($text) {
		if (substr($text, -1) == ',') :
			$text = substr($text, 0, -1);
		endif;
		return $text;
	}
	
}