<?php namespace App\Http\Controllers\Admin;

use Illuminate\Pagination\LengthAwarePaginator;

/**
 * 图片管理
 * 
 */
class ImageManager extends Auth{

	//图片保存路径
	private $upload_url;
	
	/* 初始化 */
	protected function init($uid){
		// 上传路径
		$this->upload_url = DIR_IMAGE.'images/'.$uid;
		// 如果路径不存在，创建
		if ( !is_dir($this->upload_url) )  mkdir($this->upload_url, 0755,TRUE);
	}
	
	//图片和文件夹展示
	public function index(){
		
		// 初始化
		$this->init(admin('uid'));
		// 获取参数
		$data				= request()->all();
		// 目录
		$directory			= isset($data['directory']) ? $data['directory'] : '';
		//新建文件夹
		$data['folder_url']	= url('admin/image_manager/folder?'.http_build_query(['directory'=>$directory]));
		//图片上传
		$data['upload_url'] = url('admin/image_manager/upload?'.http_build_query(['directory'=>$directory]));
		//删除
		$data['delete_url']	= url('admin/image_manager/delete?');
		//搜索
		$data['search_url']	= url('admin/image_manager/index?'.http_build_query(['directory'=>$directory]));
		// 获取数据
		$file_data			=  $this->get_file_data($data);
		//dd($file_data);
		// 图片数据
		$data['images'] 	= $file_data['images'];
		$data['pagination'] = $file_data['pagination'];
		$data['parent'] = $this->get_parent_url($data); 		

		$data['refresh'] =$this->get_refresh_url($data);		
		
		$this->assign('data',$data);	
		$this->assign('heading_title','图片管理器');	
		return $this->fetch();
	}
	
	public function get_dir($d){
		$dir='';
		foreach ($d as $v) {
				$dir.=$v.'/';
		}
		$dir = substr($dir,0,strlen($dir)-1); 
		return $dir;
	}

	//图片上传
	public function upload(){
		// 初始化
		$this->init(admin('uid'));
		// 接收参数
		$directory						= request('directory','');
		// 验证是否有这个文件夹
		$directory						= $directory ? $this->upload_url.'/'.str_replace('-','/', $directory) : $this->upload_url;
		// Check its a directory
		if( !is_dir($directory) )  		return ['error'=>'不是一个文件夹'];
		// 接收文件
		$files							= request()->file('file');
		// 循环上传的文件
		foreach( $files as $file )		{
			// 仅支持字母数字-_
			if( !preg_match('/^[A-Za-z0-9\_\.]+$/',$file->getClientOriginalName() )) return ['error'=>'仅支持字母数字-_组合'];
			//保存图片
			$info						= $file->move($directory,$file->getClientOriginalName());
			// 如果有错误
			if( !$info )				return ['error'=>$file->getError()];
		}
		// 上传成功
		return							['success'=>'上传成功'];
	}

	/**
	 * 新建文件夹
	 * 
	 */
	public function folder(){
		// 初始化
		$this->init(admin('uid'));
		// 接收参数
		$directory					= request('directory','');
		// 要创建的目录名
		$folder						= request('folder','');
		// 错误提示
		if( !$folder )  			return ['error'=>'目录名必填'];
		// 避免特殊字符
		$folder						= html_entity_decode($folder, ENT_QUOTES, 'UTF-8');
		// 仅支持字母数字-_
		if( !preg_match('/^[A-Za-z0-9\_\.]+$/',$folder) ) return ['error'=>$folder.' 文件夹仅支持字母数字_组合'];
		// 验证是否有这个文件夹
		$directory					= $directory ? $this->upload_url.'/' : $this->upload_url.'/';
		// 上级目录
		$count						= 0;
		// 替换上级目录
		$folder 					= str_replace(['../', '..\\', '..'],'',$folder,$count);
		// 有上级目录
		if( $count )				return ['error'=>'不支持创建上级目录'];
		// 不允许多级
		if( count(explode('/',$folder)) > 1 )  return ['error'=>'不支持直接创建多级目录'];
		// 替换上一级
		$folder						= '/' . trim($folder,'/').'/';
		// 拼接路径
		$folder						= $directory . $folder;
		// 如果路径不存在，创建
		if ( is_dir($folder) )  	return ['error'=>'目录已存在'];
		// 创建文件夹
		mkdir($folder, 0755, TRUE);
		// 创建成功
		return						['success'=>'创建成功'];
	}


	//删除图片和文件夹
	public function delete(){
		// 初始化
		$this->init(admin('uid'));
		// 接收参数
		$paths				= request('path',[]);
		// 没有要删除的文件夹
		if( !$paths )		return ['success'=>'非法操作'];
		// 删除
		foreach ($paths as $key => $value) {
			// 判断是否增加路径
			$paths[$key] 	= is_dir($value) ? $value : DIR_IMAGE.$value;
		}
		// 调用删除
		$this->deleteFolderAndFile($paths);
		// 清除缓存
		$this->deleteFolderAndFile([DIR_IMAGE.'cache/images/']);
		// 删除成功
		return				['success'=>'删除成功'];
	}

	/**
	 * 删除文件夹以及文件
	 * 
	 * @param  $paths  路径
	 * 
	 */
	private function deleteFolderAndFile($paths){
		//	循环处理
		foreach ($paths as $value) {
			// 替换掉前后路径
			$value			= str_replace(['../', '..\\', '..'],'', $value);
			// 判断是文件么
			if( is_file($value) ){
				// 文件直接删除
				unlink($value);
			}else{
					// 如果是目录
				$files = [];
				// Make path into an array
				$path = [$value];
				// While the path array is still populated keep looping through
				while (count($path) != 0) {
					$next = array_shift($path);
					foreach ( glob($next) as $file) {
						// If directory add to path array
						if ( is_dir($file) ) $path[] = $file . '/*';
						// Add the file to the files to be deleted array
						$files[] = $file;
					}
				}
				// Reverse sort the file array
				rsort($files);
				foreach ($files as $file) {
					// If file just delete
					if (is_file($file)) {
						@unlink($file);
					// If directory use the remove directory function
					} elseif (is_dir($file)) {
						@rmdir($file);
					}
				}
			}
		}
		// 返回结果
		return  ['success'=>'删除成功'];
	}


	//取得上一级的链接
	public function get_parent_url($data){
		$url = [];
		if (isset($data['directory'])) {
			// 验证是否有这个文件夹
			$d						= explode('-', $data['directory'] );
			$dir					= '';
			if(count($d)>1){
				for ($i=0; $i <(count($d)-1); $i++) {
					if($i<(count($d)-2)){
						$dir.=$d[$i].'-';
					}else{
						$dir.=$d[$i];
					}
				}
				$url['directory']=$dir;
			}			
		}
		if (isset($data['target'])) {
			$url['target']=$data['target'];
		}

		if (isset($data['thumb'])) {
			$url['thumb'] =$data['thumb'];
		}	
		return url('admin/image_manager/index?'.http_build_query($url));
	}
	
	//取得刷新的链接(重新加载当前页面的数据)
	public function get_refresh_url($data){
		$url = [];
		if (isset($data['directory'])) {			
			$url['directory']=$data['directory'];			
		}
		if (isset($data['target'])) {
			$url['target']=$data['target'];
		}
		if (isset($data['thumb'])) {
			$url['thumb'] =$data['thumb'];
		}
		return url('admin/image_manager/index?'.http_build_query($url));
	}

	//取得图片文件，文件夹数据，分页数据
	public function get_file_data($data){
//		判断是不是有搜索名称
		$filter_name			= isset($data['filter_name']) ? rtrim(str_replace(['../', '..\\', '..', '*'], '', $data['filter_name']), '/') : null;
//		验证是否有这个文件夹
		$directory				= empty( $data['directory'] ) ? $this->upload_url : $this->upload_url.'/'.str_replace('-','/', $data['directory']);
//		取得文件夹
		$directories			= (array) glob($directory . '/' . $filter_name . '*', GLOB_ONLYDIR);
//		取得文件
		$files 					= (array) glob($directory . '/' . $filter_name . '*.{jpg,jpeg,png,gif,JPG,JPEG,PNG,GIF}', GLOB_BRACE);
//		合并文件夹和文件
		$images					= array_merge($directories, $files);
//		如果没有文件或文件夹
		if( empty($images) ) 	return ['images'=>null,'pagination'=>null];
		if( isset($images['error']) ) return ['images'=>null,'pagination'=>null,'error'=>$images['error']];
		// 如果没有文件或文件夹
		if( !$images )			return ['images'=>null,'pagination'=>null];
		//分页用链接
		$url 								= [];
		if ( isset($data['directory']) ) 	$url['directory']	= $data['directory'];
		if ( isset($data['filter_name']) )  $url['filter_name'] = html_entity_decode($data['filter_name'], ENT_QUOTES, 'UTF-8');
		if ( isset($data['target']) )		$url['target']		= $data['target'];
		if ( isset($data['thumb']) ) 		$url['thumb']		= $data['thumb'];
		// 分页
		$pagination				= new LengthAwarePaginator( array_slice($images,(16*(request('page')?request('page')-1:0)),16) ,count($images),16,null,['path'=>url('admin/image_manager/index?'.http_build_query($url))]);
		// 图片
		$images					= $pagination->items();
		// 循环所有目录及文件
		foreach ($images as $image) {
			// 获取文件名
			$name				= basename($image);
			// 获取后缀
			$ext				= pathinfo($image,PATHINFO_EXTENSION);
			// 临时数据
			$temp				= [];
			$thumb		= mb_substr($image, mb_strlen(DIR_IMAGE),mb_strlen($image));
			//echo ($thumb);
			// 如果是图片显示
			if( in_array($ext,['jpg','jpeg','png','gif','JPG','JPEG','PNG','GIF']) ){
				// 组合参数
				//$temp['thumb']			= path_compat($thumb, 100, 100);
				$temp['thumb']			= $thumb;
				$temp['name']			= $name;
				$temp['type']			= 'image';
				$temp['path']			= $thumb;
				// 赋值
				$result['images'][]		= $temp;
			}
			// 如果没有后缀,是目录
			if( !$ext ){
				// url跳转时的目录
				$url['directory']		= rtrim(str_ireplace('/', '-', mb_substr($image, mb_strlen($this->upload_url.'/'),mb_strlen($image))),'-');
				// 显示时的目录
				$path					= str_ireplace('/', '-', $image);
				// 打开
				if ( isset($data['target']) )	$url['target']	= $data['target'];
				// 缩略
				if (isset($data['thumb']))  	$url['thumb']	= $data['thumb'];
				// 组合参数
				$temp['thumb']			= '';
				$temp['name']			= $name;
				$temp['type']			= 'directory';
				$temp['path']			= $path;
				$temp['href']			= url('admin/image_manager/index?'.http_build_query($url));
				// 赋值
				$result['images'][]		= $temp;
			}
		}
		//分页显示
		$result['pagination']			= $pagination->render();
		//返回列表数据
		return							$result;
	}
}