<?php

namespace common\components;

use yii\imagine\Image;

class fileUtil
{
	
	//商家所用的图片上传 shish 2020.2.26
	public static function imgUpload($merchantId)
	{
		header('Content-type:text/html;charset=utf-8');
		$base64 = file_get_contents('php://input');
		$base64_image_content = str_replace("content=", "", urldecode($base64));
		//匹配出图片的格式
		if (preg_match('/^(data:\s*image\/(\w+);base64,)/', $base64_image_content, $result)) {
			$type = $result[2];
			$month = date("Ym");
			$date = date("d");
			$path = dirUtil::getImgUploadDir() . "/{$merchantId}/{$month}/{$date}/";
			if (!file_exists($path)) {
				//检查是否有该文件夹，如果没有就创建，并给予最高权限
				mkdir($path, 0700, true);
			}
			$preFileName = uniqid();
			$newFile = $preFileName . ".{$type}";
			$fullPathFile = $path . $newFile;
			if (file_put_contents($fullPathFile, base64_decode(str_replace($result[1], '', $base64_image_content))) == false) {
				util::fail('上传失败！！');
			}
			$img = "/uploads/{$merchantId}/{$month}/{$date}/" . $newFile;
			$imgInfo = getimagesize($fullPathFile);
			$width = $imgInfo[0];
			$height = $imgInfo[1];
			
			//如果图片太大，进行压缩，并删除原图
			if ($width > 800) {
				$newWidth = 800;
				$newHeight = ceil((800 * $height) / $width);
				$preFileName = stringUtil::uniqueFileName();
				$newFile = $preFileName . ".{$type}";
				$newFullPathFile = $path . $newFile;
				Image::thumbnail($fullPathFile, $newWidth, $newHeight)->save($newFullPathFile, ['quality' => 100]);
				$width = $newWidth;
				$height = $newHeight;
				$img = "/uploads/{$merchantId}/{$month}/{$date}/" . $newFile;
				unlink($fullPathFile);
				$fullPathFile = $newFullPathFile;
			}
			
			//生成小图 300px
			$smallWidth = 300;
			$smallHeight = ceil(($smallWidth * $height) / $width);
			$smallFullPathFile = $path . $preFileName . '_small.' . $type;
			Image::thumbnail($fullPathFile, $smallWidth, $smallHeight)->save($smallFullPathFile, ['quality' => 100]);
			
			$data = business::formatUploadImg($img);
			$data['shortUrl'] = $img;
			return $data;
		}
		util::fail('上传失败！');
	}
	
}