<?php
// +----------------------------------------------------------------------
// | ShopXO 国内领先企业级B2C免费开源电商系统
// +----------------------------------------------------------------------
// | Copyright (c) 2011~2099 http://shopxo.net All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( https://opensource.org/licenses/mit-license.php )
// +----------------------------------------------------------------------
// | Author: Devil
// +----------------------------------------------------------------------
namespace base;

/**
 * Excel驱动
 * @author   Devil
 * @blog     http://gong.gg/
 * @version  0.0.1
 * @datetime 2017-01-10T21:51:08+0800
 */
class Excel
{
	private $filename;
	private $file_type;
	private $suffix;
	private $data;
	private $title;
	private $jump_url;
	private $msg;
	private $horizontal_center;
	private $vertical_center;
	private $warap_text;
	private $writer_type;

	/**
	 * 构造方法
	 * @author   Devil
	 * @blog     http://gong.gg/
	 * @version  0.0.1
	 * @datetime 2017-01-10T15:09:17+0800
	 * @param    [string]       $params['filename']				[文件名称（追加当前时间）]
	 * @param    [string]       $params['suffix']				[文件后缀名（默认xls）]
	 * @param    [string]       $params['jump_url']				[出错跳转url地址（默认上一个页面）]
	 * @param    [string]       $params['msg']					[错误提示信息]
	 * @param    [string]       $params['file_type']			[导出文件类型（默认excel）]
	 * @param    [array]        $params['title']				[标题（二维数组）]
	 * @param    [array]        $params['data']					[数据（二维数组）]
	 * @param    [int]          $params['horizontal_center']	[是否水平居中 1是]
	 * @param    [int]          $params['vertical_center']		[是否垂直居中 1是]
	 * @param    [int]          $params['warap_text']			[是否内容自动换行 1是]
	 */
	public function __construct($params = [])
	{
		// 文件名称
		$date = date('YmdHis');
		$this->filename = isset($params['filename']) ? $params['filename'].'-'.$date : $date;

		// 文件类型, 默认excel
		$type_all = array('excel' => 'vnd.ms-excel', 'pdf' => 'pdf');
		$this->file_type = (isset($params['file_type']) && isset($type_all[$params['file_type']])) ? $type_all[$params['file_type']] : $type_all['excel'];

		// 文件后缀名称
		$this->suffix = empty($params['suffix']) ? 'xls' : $params['suffix'];

		// 标题
		$this->title = isset($params['title']) ? $params['title'] : [];

		// 数据
		$this->data = isset($params['data']) ? $params['data'] : [];

		// 出错跳转地址
		$this->jump_url = empty($params['jump_url']) ? (empty($_SERVER['HTTP_REFERER']) ? __MY_URL__ : $_SERVER['HTTP_REFERER']) : $params['jump_url'];

		// 错误提示信息
		$this->msg = empty($params['msg']) ? 'title or data cannot be empty!' : $params['msg'];

		// 水平,垂直居中
		$this->horizontal_center = isset($params['horizontal_center']) ? intval($params['horizontal_center']) : 1;
		$this->vertical_center = isset($params['vertical_center']) ? intval($params['vertical_center']) : 1;

		// 内容自动换行
		$this->warap_text = isset($params['warap_text']) ? intval($params['warap_text']) : 1;

		// excel写入类型
		$this->writer_type = empty($params['writer_type']) ? 'Excel5' : trim($params['writer_type']);

		// 引入PHPExcel类库
		require ROOT.'extend'.DS.'phpexcel'.DS.'PHPExcel.php';
	}

	/**
	 * 根据字段个数，设置表头排序字母
	 * @author  Devil
	 * @blog    http://gong.gg/
	 * @version 1.0.0
	 * @date    2022-01-10
	 * @desc    description
	 */
	public function GetLetterData()
	{
		$letter_str = '';
		if(!empty($this->title) && is_array($this->title))
		{
			$count = count($this->title);
			for($i='A',$k=0; $i<='Z'; $i++, $k++)
			{
			    if($k == $count)
			    {
			        break;
			    }

			    // 最后一个取消逗号
			    if($k == ($count-1))
			    {
			        $letter_str .= $i;
			    } else {
			        $letter_str .= $i.',';
			    }
			}
		}
		return explode(',', $letter_str);
	}

	/**
	 * excel文件导出
	 * @author   Devil
	 * @blog     http://gong.gg/
	 * @version  0.0.1
	 * @datetime 2017-01-10T15:12:01+0800
	 */
	public function Export()
	{
		// 是否有数据
		if(empty($this->title) && empty($this->data))
		{
			echo '<script>alert("'.$this->msg.'");</script>';
			echo '<script>window.location.href="'.$this->jump_url.'"</script>';
			die;
		}

		// 获取配置编码类型
		$excel_charset = MyC('admin_excel_charset', 0);
		$charset = MyConst('common_excel_charset_list')[$excel_charset]['value'];

		// 获取字母
		$letter_data = $this->GetLetterData();

		// excel对象
		$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
		$sheet = $spreadsheet->getActiveSheet();

		// 标题
		$temp_cum = 0;
		$temp_row = 1;
		foreach($this->title as $k=>$v)
		{
			if(array_key_exists($temp_cum, $letter_data))
			{
				$temp_letter = $letter_data[$temp_cum].$temp_row;
				$value = ($excel_charset == 0) ? $v['name'] : iconv('utf-8', $charset, $v['name']);
	    		$sheet->setCellValue($temp_letter, $value);
	    		$sheet->getStyle($temp_letter)->getFont()->setBold(true);
	    		$temp_cum++;
			}
		}

		// 内容
		$temp_row = 2;
		foreach($this->data as $k=>$v)
		{
			if(is_array($v) && !empty($v))
			{
				$temp_cum = 0;
				foreach($this->title as $tk=>$tv)
				{
					if(array_key_exists($temp_cum, $letter_data))
					{
						$temp_letter = $letter_data[$temp_cum];
						$height = isset($tv['height']) ? intval($tv['height']) : 0;
						$width = isset($tv['width']) ? intval($tv['width']) : $height;
						if($tv['type'] == 'images')
						{
							$drawing = new \PhpOffice\PhpSpreadsheet\Worksheet\Drawing();
				            $drawing->setPath($v[$tk]);

				            // 设置宽度高度
				            $number = empty($height) ? 50 : $height-10;
				            $drawing->setHeight($number);
				            $drawing->setWidth($number);
				            $drawing->setCoordinates($temp_letter.$temp_row);

				            // 图片偏移距离
				            $x = ($width > 0) ? (($width-$number)/2)+15 : 15;
				            $drawing->setOffsetX($x);
				            $drawing->setOffsetY(15);
				            $drawing->setWorksheet($spreadsheet->getActiveSheet());
						} else {
							$value = ($excel_charset == 0) ? $v[$tk] : iconv('utf-8', $charset, $v[$tk]);
							$sheet->setCellValueByColumnAndRow($temp_cum+1, $temp_row, $value);
						}

						// 单元格宽高
						if($width > 0)
						{
							$spreadsheet->getActiveSheet()->getColumnDimension($temp_letter)->setWidth($width/5);
						}

						// 水平,垂直居中
						if($this->horizontal_center == 1)
						{
							$spreadsheet->getActiveSheet()->getStyle($temp_letter)->getAlignment()->setHorizontal(\PhpOffice\PhpSpreadsheet\Style\Alignment::HORIZONTAL_CENTER);
						}
						if($this->vertical_center == 1)
						{
							$spreadsheet->getActiveSheet()->getStyle($temp_letter)->getAlignment()->setVertical(\PhpOffice\PhpSpreadsheet\Style\Alignment::VERTICAL_CENTER);
						}

						// 自动换行
						if($this->warap_text == 1)
						{
							$sheet->getStyle($temp_letter)->getAlignment()->setWrapText(true);
						}
						$temp_cum++;
					}

					// 行高度
					if($height > 0)
					{
						$spreadsheet->getActiveSheet()->getRowDimension($temp_row)->setRowHeight($height);
					}
				}
				$temp_row++;
			}
		}

		// 丢弃输出缓冲区中的内容
        if(ob_get_length() > 0)
        {
            ob_clean();
        }

        // 头部
		header('Pragma: public');
		header('Expires: 0');
		header('Cache-Control:must-revalidate, post-check=0, pre-check=0');
		header('Content-Type:application/force-download');
		header('Content-Type:application/'.$this->file_type.';charset='.$charset);
		header('Content-Type:application/octet-stream');
		header('Content-Type:application/download');
		header('Content-Disposition:attachment;filename='.$this->filename.'.'.$this->suffix);
		header('Content-Transfer-Encoding:binary');
		$writer = \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, ucfirst($this->suffix));
		$writer->save('php://output');
	}

	/**
	 * excel文件导入
	 * @author   Devil
	 * @blog     http://gong.gg/
	 * @version  0.0.1
	 * @datetime 2017-04-06T18:18:55+0800
	 * @param    [string]    $file [文件位置,空则读取全局excel的临时文件]
	 * @return   [array]           [数据列表]
	 */
	public function Import($file = '')
	{
		// 文件为空则取全局文变量excel的临时文件
		if(empty($file) && (empty($_FILES['file']) || empty($_FILES['file']['tmp_name'])))
		{
			return DataReturn('文件为空', -1);
		}
		$file = empty($file) ? $_FILES['file']['tmp_name'] : $file;

		// 取得文件基础数据及类型判断
		$extension = empty($_FILES['file']['name']) ? 'xlsx' : substr($_FILES['file']['name'], strripos($_FILES['file']['name'], '.')+1);
		if(!in_array($extension, ['csv', 'xls', 'xlsx']))
		{
			return DataReturn('无效的excel类型文件', -1);
		}
		if('csv' == $extension)
		{     
			$reader = new \PhpOffice\PhpSpreadsheet\Reader\Csv();
		} else if('xls' == $extension)
		{     
			$reader = new \PhpOffice\PhpSpreadsheet\Reader\Xls();
		} else { 
			$reader = new \PhpOffice\PhpSpreadsheet\Reader\Xlsx();
		}
		$spreadsheet = $reader->load($file);

		// 定义变量
		$data = [];
		$title = [];
		$sheet = $spreadsheet->getActiveSheet();
		foreach($sheet->getRowIterator(1) as $rk=>$row)
		{
			$tmp = [];
			foreach($row->getCellIterator() as $cell)
			{
				$value = $cell->getFormattedValue();
				if($rk == 1)
				{
					$title[] = $value;
				} else {
					$tmp[] = $value;
				}
			}
			// 避免正行为空
			if(count(array_filter($tmp)) > 0)
			{
				$data[] = $tmp;
			}
		}
		$result = [
			'title'	=> $title,
			'data'	=> $data,
		];
		return DataReturn('处理成功', 0, $result);
	}
}
?>