<?php
// +----------------------------------------------------------------------
// | KyxsCMS [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2018~2019 http://www.kyxscms.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: kyxscms
// +----------------------------------------------------------------------

namespace app\common\model;
use think\Model;
use think\Db;
use think\facade\Request;
use think\facade\Cache;
use think\facade\Config;
use think\facade\Env;
use think\facade\Validate;
use org\File;
use net\Gather;

class Api extends Model
{
	public function get_nav($category,$type,$limit,$cid,$field=true){
		$map = ['status' => 1,'pid' => $category];
		if($type!==false){
			$map['type']=$type;
		}
        $data=Db::name('category')->field($field)->where($map)->limit($limit)->order('sort')->select();
        if($data){
			foreach ($data as $k=>$v){
				$meun_list[$k]=$v;
				if($v["type"]==3){
					$meun_list[$k]["url"]=$this->nav_check_url($v["link"]);
					$meun_list[$k]["branch"]=0;
					$visit = strtolower(Request::module()."/".Request::controller()."/".Request::action());
					if($v["link"]==$visit){
						$meun_list[$k]["current"]=1;
					}else{
						$meun_list[$k]["current"]=0;
					}
				}else{
					$meun_list[$k]["url"]=url("home/lists/index",["id"=>$v["id"]]);
					$meun_list[$k]["branch"]=$this->get_branch($v["id"]);
					$meun_list[$k]["current"]=$this->has_current($v["id"],$cid);
				}
			}
			if($category===0 && $type===false){
				array_unshift($meun_list,['id'=>0,'title'=>'首页','url'=>url('home/index/index'),'branch'=>0,'current'=>$this->has_current(0,$cid)]);
			}
			return $meun_list;
		}
    }

    public function get_slider($limit){
		$map = ['status' => 1];
		$map['type'] = Request::isMobile()?'1':'0';
        $data=Db::name('slider')->where($map)->limit($limit)->order('sort')->select();
        if($data){
			foreach ($data as $k=>$v){
				$slider_list[$k]=['id'=>$v['id'],'title'=>$v['title'],'pic'=>$this->check_pic($v['picpath']),'url'=>$v['link']];
			}
			return $slider_list;
		}
    }

    public function get_news($category, $order, $limit, $pos, $time, $page, $id=null){
    	$category=$this->get_id($category);
		$map = $this->list_map($category,$pos);
		if($id){
			$map[] = ['id','in',$id];
		}
        $news=Db::name('news')->where($map)->whereTime('update_time',$time)->order($order);
        if($page){
        	$simple = Request::isMobile()?true:false;
        	$data=$news->paginate($limit,$simple);
    	}else{
    		$data=$news->limit($limit)->select();
    	}
        if($data){
         	foreach ($data as $k=>$v){
				$data[$k]=$this->data_change($v,'news');
			}
			return $data;
		}
    }

    public function get_novel($category, $order, $limit, $pos, $time, $newbook, $over, $author, $page, $id=null){
    	$category=$this->get_id($category);
    	if($page){
    		$map = $this->list_page_map($category);
	    	$update=Request::param('update',NULL);
	    	if(Request::param('order')){
	    		$order=Request::param('order');
	    		if(strstr($order,'+')){
	    			$order=str_replace('+',' ',$order);
	    		}
	    	}
	    	if(isset($update)){
				$filter_update=array_keys(Config::get('web.filter_update'));
				$time=$filter_update[$update];
			}
    	}else{
    		$map = $this->list_map($category,$pos);
    	}
		if($newbook){
			$map[] = ['serialize','=',0];
			$map[] = ['create_time','>=',strtotime("-3 month")];
		}
		if($over){
			$map[] = ['serialize','=',1];
		}
		if($author){
			$map[] = ['author','=',$author];
		}
		if($id){
			$map[] = ['id','in',$id];
		}
        $novel=Db::name('novel')->where($map)->order($order);
        if($time){
        	$novel=$novel->whereTime('update_time',$time);
        }
        if($page){
        	$simple = Request::isMobile()?true:false;
        	$data=$novel->paginate($limit,$simple);
    	}else{
    		$data=$novel->limit($limit)->select();
    	}
        if($data){
         	foreach ($data as $k=>$v){
				$data[$k]=$this->data_change($v,'novel');
			}
			return $data;
		}
    }

    public function get_chapter_list($nid, $order, $limit, $page){
    	$map[] = ['status','=',1];
    	$map[] = ['novel_id','=',$nid];
    	$chapter_data=Db::name('novel_chapter')->field('id,chapter')->where($map)->find();
    	if($chapter_data){
    		$chapter_data['chapter']=$this->decompress_chapter($chapter_data['chapter']);
    		$chapter_data['chapter']=json_decode($chapter_data['chapter'],true);
    	}
    	if(strpos(strtolower($order),'desc') !== false){
    		$data=array_reverse($chapter_data['chapter']);
    	}else{
    		$data=$chapter_data['chapter'];
    	}
    	if($page){
    		$class='\\think\\paginator\\driver\\Bootstrap';
    		$page_num  = call_user_func([$class,'getCurrentPage',]);
    		$page_num = $page_num < 1 ? 1 : $page_num;
        	$config['path'] = call_user_func([$class, 'getCurrentPath']);
        	$totals=count($data);
	        if($totals>$limit){
	            $start=$page_num*$limit;
	            $data=array_slice($data,$start,$limit,true);
	        }
	        $simple = Request::isMobile()?true:false;
        	$data=$class::make($data, $limit, $page_num, $totals, $simple, $config);
    	}else{
    		if($limit){
    			$data=array_slice($data,0,$limit,true);
    		}
    	}
    	if($data){
         	foreach ($data as $k=>$v){
         		if($v['issued']==1){
         			$data[$k]['id']=$k;
         			$data[$k]['new']=(time()-$v['update_time']<(3*24*3600))?1:0;
					$data[$k]['time']=$v['update_time'];
					$data[$k]['url']=url('home/chapter/index',['id'=>$chapter_data['id'],'key'=>$k]);
         		}else{
         			unset($data[$k]);
         		}
			}
			return $data;
		}
    }

    public function get_chapter($id,$key){
    	$map[] = ['status','=',1];
    	$map[] = ['id','=',$id];
    	$chapter_data=Db::name('novel_chapter')->field('id,chapter,novel_id,collect_id')->where($map)->find();
    	if($chapter_data){
    		$chapter_data['chapter']=$this->decompress_chapter($chapter_data['chapter']);
    		$chapter_data['chapter']=json_decode($chapter_data['chapter'],true);
    		$chapter=isset($chapter_data['chapter'][$key])?$chapter_data['chapter'][$key]:'';
    		if($chapter){
		    	$chapter['id']=$key;
		    	$chapter['novel_id']=$chapter_data['novel_id'];
		    	$chapter['source_id']=$chapter_data['id'];
		    	$chapter_data_keys = array_keys($chapter_data['chapter']);
		    	$chapter_data_keys_num = array_search($key,$chapter_data_keys);
		    	if($chapter_data_keys_num<=0){
		    		$chapter['prev']=null;
		    	}else{
		    		$chapter_data_prev_keys=$chapter_data_keys[$chapter_data_keys_num-1];
		    		$chapter['prev']=$chapter_data['chapter'][$chapter_data_prev_keys];
		    		$chapter['prev']['id']=$chapter_data_prev_keys;
		    	}
		    	if($chapter_data_keys_num>=(count($chapter_data_keys)-1)){
		    		$chapter['next']=null;
		    	}else{
		    		$chapter_data_next_keys=$chapter_data_keys[$chapter_data_keys_num+1];
		    		$chapter['next']=$chapter_data['chapter'][$chapter_data_next_keys];
		    		$chapter['next']['id']=$chapter_data_next_keys;
		    	}
		    	$chapter['time']=time_format($chapter['update_time']);
		    	$chapter['prev']['url']=$chapter['prev']?url('home/chapter/index',['id'=>$id,'key'=>$chapter_data_prev_keys]):'javascript:void(0);';
		    	$chapter['next']['url']=$chapter['next']?url('home/chapter/index',['id'=>$id,'key'=>$chapter_data_next_keys]):'javascript:void(0);';
		    	if($chapter['auto']==1){
		    		$getchapter=model('common/union_chapter')->get_chapter($chapter['reurl']);
		    		if(!empty($getchapter['content'])){
		    			$word=mb_strlen($getchapter['content']);
		    			$this->set_chapter_content($chapter['path'],$getchapter['content']);
		    			$chapter_data['chapter'][$key]['auto']=0;
		    			$chapter_data['chapter'][$key]['word']=$word;
		    			$chapter_data['chapter'][$key]['intro']=$getchapter['intro'];
		    			$chapter_data['chapter']=json_encode($chapter_data['chapter']);
		    			$chapter_data['chapter']=$this->compress_chapter($chapter_data['chapter']);
		    			Db::name('novel_chapter')->update($chapter_data);
		    			$chapter['content']=$getchapter['content'];
						$chapter['intro']=$getchapter['intro'];
						$chapter['word']=$word;
		    		}else{
		    			$chapter['content']=model('common/union_chapter')->getError();
		    		}
		    	}elseif($chapter['auto']==2){
		    		$getchapter=Gather::get_chapter_content($chapter_data['collect_id'],$chapter['reurl']);
		            if($getchapter!==false){
		            	$word=mb_strlen($getchapter['chapter_content']);
		            	if($word>500){
		            		$this->set_chapter_content($chapter['path'],$getchapter['chapter_content']);
			    			$chapter_data['chapter'][$key]['auto']=0;
			    			$chapter_data['chapter'][$key]['word']=$word;
			    			if(!empty($getchapter['chapter_title'])){
			    				$chapter_data['chapter'][$key]['title']=$getchapter['chapter_title'];
			    			}
			    			$chapter_data['chapter']=json_encode($chapter_data['chapter']);
			    			$chapter_data['chapter']=$this->compress_chapter($chapter_data['chapter']);
			    			Db::name('novel_chapter')->update($chapter_data);
			    			$novel_data=['word'=>Db::raw('word+'.($word-$chapter['word']))];
			    			Db::name('novel')->where(['id'=>$chapter['novel_id']])->update($novel_data);
		            	}
						$chapter['word']=$word;
		                $chapter['title']=empty($getchapter['chapter_title'])?'':$getchapter['chapter_title'];
		                $chapter['content']=empty($getchapter['chapter_content'])?'章节内容转码失败！':$getchapter['chapter_content'];
		            }else{
		                $chapter['content']='章节内容转码失败！';
		            }
		    	}else{
		    		$chapter['content']=$this->get_chapter_content($chapter['path']);
		    	}
		    	$chapter['content']=$this->change_chapter_content($chapter['content']);
		    	return $chapter;
    		}
	    }
    }

	public function get_link($limit){
		$map = ['status' => 1];
		$link=Db::name('link')->where($map)->field('id,title,url')->limit($limit)->select();
		return $link;
	}

	public function get_filter($name,$type,$cid){
		$name = ($name=="type")?"id":$name;
		$map=Request::param();
		unset($map[$name],$map['page']);
		$filter_name=Request::param($name);
		if($name=="id"){
			$id=$this->siblingsId($cid);
			if($id!==0){
				$map[$name]=$id;
			}
			$filter[]=["title"=>'全部',"url"=>url('home/lists/lists',$map),'current'=>($id==Request::param('id'))?1:0];
			$where = ['status' => 1,'pid' => $id];
			if($type!==false){
				$where['type'] = $type;
			}
			$data=Db::name('category')->where($where)->field('id,title,type,link')->select();
			foreach ($data as $key => $value){
				if($value["type"]==3){
					$filter[]=["title"=>$value["title"],"url"=>$this->nav_check_url($value["link"]),'current'=>$this->filter_has_current($value['id'],$filter_name)];
				}else{
					$map[$name]=$value['id'];
					$filter[]=["title"=>$value["title"],"url"=>url('home/lists/lists',$map),'current'=>$this->filter_has_current($value['id'],$filter_name)];
				}
			}
		}else{
			$filter[]=["title"=>'全部',"url"=>url('home/lists/lists',$map),'current'=>isset($filter_name)?0:1];
			$i=0;
			foreach (Config::get('web.filter_'.$name) as $key => $value) {
				$map[$name]=$i;
				$filter[]=["title"=>$value,"url"=>url('home/lists/lists',$map),'current'=>($filter_name==$i && isset($filter_name))?1:0];
				$i++;
			}
		}
		return $filter;
	}

	//面包屑导航
    public function get_crumbs($cid=0,$id=0){
    	$type=strtolower(Request::controller());
    	if(!in_array($type,['novel','news'])){
    		$type='novel';
    	}
		$crumbs[]=['title'=>'首页','url'=>url('home/index/index')];
		if($cid){
			$crumbs=array_merge($crumbs,$this->get_parent($cid));
		}
		if($keyword=Request::param('keyword')){
			$crumbs[]=['title'=>$keyword,'url'=>url('home/search/index',['keyword'=>$keyword])];
		}
		if($id){
			$data=Db::name($type)->where('id',$id)->field("id,title")->find();
			if($data){
				$crumbs[]=['title'=>$data['title'],'url'=>url('home/'.$type.'/index',['id'=>$data['id']])];
			}
		}
		return $crumbs;
	}

	// oauth登录
	public function get_oauth_login($mold){
		$config = [];
        $map=[];
        $map[] = ['group','=','oauth'];
        $map[] = ['status','=',1];
        $map[] = ['','exp',Db::raw('find_in_set("'.$mold.'",`mold`)')];
        $login  =   Db::name('Addons')->where($map)->field('title,name,config')->order('sort')->select();
        if($login){
        	foreach ($login as $key => $value) {
        		$config=json_decode($value['config'],true);
        		$data[$key]['title']=$value['title'];
        		$data[$key]['pic']=$config['login_img'];
        		$data[$key]['url']=url('\\addons\\'.$value['name'].'\\'.$value['name'].'@login');
        	}
        	return $data;
        }
	}

	//ad代码
	public function get_ad($id){
		$ad  =   Db::name('ad')->where(['id'=>$id])->value('value');
		if($ad){
			return $ad;
		}
	}

	public function get_branch($category){
		$map = ['status' => 1,'pid'=>$category];
		$Count=Db::name("category")->where($map)->Count();
		if($Count>0){
			return 1;
		}else{
			return 0;
		}
	}

	private function has_current($id,$cid){
		$visit = strtolower(Request::module()."/".Request::controller()."/".Request::action());
		if($id==0 && empty($cid) && $visit=='home/index/index'){
			return 1;
		}
		if($id==$cid && $id!=0 && $visit=='home/lists/index'){
			return 1;
		}
		if($id==$this->get_category($cid,'pid') && $cid  && $id!=0 && $visit=='home/lists/index'){
			return 1;
		}
		return 0;
	}

	private function filter_has_current($id,$cid){
		if($id==$cid && $id!=0){
			return 1;
		}
		if($id==$this->get_category($cid,'pid') && $cid  && $id!=0){
			return 1;
		}
		return 0;
	}

	private function get_id($id){
		if($id){
			$id = explode(',',$id);
			$map = ['status' => 1,'pid' => $id];
			$info = Db::name('category')->field("id")->where($map)->order('sort')->select();
			if($info){
				foreach ($info as $key=>$val){
					$ids[]=$val["id"];
				}
				return $ids;
			}else{
				return $id;
			}
		}
	}

	private function siblingsId($id){
		$pid=$this->get_category($id,'pid');
		if($pid==0){
			return $id;
		}
		return $pid;
	}

	private function list_map($category,$pos){
		$map[] = ['status','=',1];
		if(!empty($category)){
			$map[] = is_array($category)?['category','in',$category]:['category','=',$category];
		}
		if(is_numeric($pos)){
			$map[] = ['position','exp',Db::raw('& '.$pos.' = '.$pos)];
		}
		return $map;
	}

	private function list_page_map($category){
		$map[] = ['status','=',1];
		$serialize=Request::param('serialize',NULL);
		$size=Request::param('size',NULL);
		$keyword=Request::param('keyword',NULL);
		if(isset($keyword)){
			$map[]=['title|author','like','%'.trim($keyword).'%'];
			return $map;
		}
		if(!empty($category)){
			$map[] = is_array($category)?['category','in',$category]:['category','=',$category];
		}
		if(isset($serialize)){
			$filter_serialize=array_keys(Config::get('web.filter_serialize'));
			$map[]=['serialize','=',$filter_serialize[$serialize]];
		}
		if(isset($size)){
			$filter_size=array_keys(Config::get('web.filter_size'));
			$where_size=explode(' ',$filter_size[$size]);
			$map[]=['word',$where_size[0],$where_size[1]];
		}
		return $map;
	}

	private function get_parent($id,&$list=[]){
		$data=$this->get_category($id);
		if($data){
			array_unshift($list,['title'=>$data['title'],'url'=>url('home/lists/index',['id'=>$data['id']])]);
			$this->get_parent($data['pid'],$list);
		}
		return $list;
	}

	public function get_category($cid,$field=''){
		$data=Cache::remember('category',function(){
			return Db::name("category")->where('status',1)->column('*','id');
		});
		if($field){
			return isset($data[$cid][$field])?$data[$cid][$field]:false;
		}else{
			return isset($data[$cid])?$data[$cid]:false;
		}
	}

	public function data_change($data,$type){
		$data["cid"]=$data["category"];
		$data["ctitle"]=$this->get_category($data["category"],'title');
		$data["curl"]=url('home/lists/index',["id"=>$data["category"]]);
		$data["time"]=$data["update_time"];
		$data['pic']=$this->check_pic($data['pic']);
		switch ($type) {
			case 'news':
				preg_match_all('/<img.*?src="(.*?)".*?>/is',$data["content"],$matches);
				$data["content_pic"]=$matches[1];
				break;
			case 'novel':
				$data['tag_array']=explode(',', $data['tag']);
				$data["word_million"]=number_format($data["word"]/10000,2);
				$data["serialize_text"]=($data["serialize"]==1)?"已完结":"连载中";
				$data["author_url"]=url('home/search/index',['keyword'=>$data["author"]]);
				$chapter_data=Db::name('novel_chapter')->field('id,chapter')->where(['novel_id'=>$data['id'],'status'=>1])->find();
				if($chapter_data){
					$chapter_data['chapter']=$this->decompress_chapter($chapter_data['chapter']);
					$chapter_data['chapter']=json_decode($chapter_data['chapter'],true);
					$chapter_data_last=end($chapter_data['chapter']);
					$chapter['source_id']=$chapter_data['id'];
					$chapter['chapter_id']=array_search($chapter_data_last,$chapter_data['chapter']);
					$chapter['chapter_title']=$chapter_data_last['title'];
					$visit = strtolower(Request::module()."/".Request::controller()."/".Request::action());
					$allowUrl = ['home/novel/index'];
					if(in_array($visit,$allowUrl)){
						if($chapter_data_last['auto']==0){
							$chapter['chapter_content']=$this->get_chapter_content($chapter_data_last['path']);
							$chapter['chapter_content']=$this->change_chapter_content($chapter['chapter_content']);
						}else{
							$chapter['chapter_content']='';
						}
					}
					$data=array_merge($data,$chapter);
					$data['chapter_time'] = $chapter_data_last['update_time'];
					$data['chapter_word'] = $chapter_data_last['word'];
					$data["chapter_url"]=url('home/chapter/index',['id'=>$chapter_data['id'],'key'=>$data['chapter_id']]);
					$data["chapter_count"]=count($chapter_data['chapter']);
				}else{
					$data['chapter_id'] = "";
					$data['chapter_title'] = "";
					$data['chapter_content'] = "";
					$data['chapter_time'] = "";
					$data['chapter_word'] = "";
					$data['chapter_count'] = "";
					$data['chapter_url'] = "";
				}
				break;
			default:
				break;
		}
		$data["url"]=url("home/".$type."/index",["id"=>$data["id"]]);
		$data["digg"]=[
			"up"=>$data["up"],
			"up_js"=>"onclick=digg('".$data["id"]."','up','".$type."')",
			"down"=>$data["down"],
			"down_js"=>"onclick=digg('".$data["id"]."','down','".$type."')"
		];
		unset($data["category"],$data["status"],$data["up"],$data["down"]);
		return $data;
	}

	public function get_tpl($id,$tpl_type){
		$tpl=$this->get_category($id);
		if($tpl[$tpl_type]){
			return $tpl[$tpl_type];
		}
		if($tpl['pid']==0){
			$this->error='模板未设置！';
		}else{
			return $this->get_tpl($tpl['pid'],$tpl_type);
		}
	}

	public function novel_detail($id){
		$info = Db::name("novel")->where(['id'=>$id,'status'=>1])->find();
		if(!$info){
			$this->error = '小说被禁用或已删除！';
			return false;
		}
		return $this->data_change($info,'novel');
	}

	public function novel_reader_url($id){
		$chapter=Db::name('novel_chapter')->field('id,chapter')->where(['novel_id'=>$id,'status'=>1])->find();
		if($chapter){
            $chapter['chapter']=$this->decompress_chapter($chapter['chapter']);
			$chapter['chapter']=json_decode($chapter['chapter'],true);
			$chapter_key=key($chapter['chapter']);
			return url('home/chapter/index',['id'=>$chapter['id'],'key'=>$chapter_key]);
		}
	}

	public function news_detail($id){
		$info = Db::name("news")->where(['id'=>$id,'status'=>1])->find();
		if(!$info){
			$this->error = '文章被禁用或已删除！';
			return false;
		}
		return $this->data_change($info,'news');
	}

	public function hits($id,$type){
		$hits_time=Db::name($type)->where(['id'=>$id])->value('hits_time');
		if(date('d',$hits_time)==date('d',time())){
			$data['hits_day']=Db::raw('hits_day+1');
		}else{
			$data['hits_day']=1;
		}
		if(date('W',$hits_time)==date('W',time())){
			$data['hits_week']=Db::raw('hits_week+1');
		}else{
			$data['hits_week']=1;
		}
		if(date('m',$hits_time)==date('m',time())){
			$data['hits_month']=Db::raw('hits_month+1');
		}else{
			$data['hits_month']=1;
		}
		$data['hits']=Db::raw('hits+1');
		$data['hits_time']=time();
		Db::name($type)->where('id',$id)->update($data);
	}

	public function digg($id,$type,$digg){
		if(!cookie('digg_'.$type.$digg.$id)){
			cookie('digg_'.$type.$digg.$id,true);
			Db::name($type)->where('id',$id)->setInc($digg);
			return true;
		}else{
			return false;
		}
	}

	public function compress_chapter($content){
		if(Config::get('web.data_save_compress')){
			ini_set("memory_limit","-1");
            $content=base64_encode(gzcompress($content,Config::get('web.data_save_compress_level')));
        }
        return $content;
	}

	public function decompress_chapter($content){
		if(Config::get('web.data_save_compress')){
			ini_set("memory_limit","-1");
            $content=@gzuncompress(base64_decode($content));
        }
        return $content;
	}

	public function get_chapter_content($path){
		$addons_name = Cache::remember('addons_storage',function(){
        	$map = ['status'=>1,'group'=>'storage'];
			return Db::name('Addons')->where($map)->value('name');
		});
		if($addons_name){
        	$addons_class = get_addon_class($addons_name);
	        if(class_exists($addons_class)){
	        	$addon = new $addons_class();
	        	$content = $addon->read($path);
	        }
        }else{
        	$content=File::read(Env::get('runtime_path').'txt'.DIRECTORY_SEPARATOR.$path);
        }
        $content=$this->decompress_chapter($content);
        return $content;
	}

	public function set_chapter_content($path,$content){
        $content=$this->compress_chapter($content);
        $addons_name = Cache::remember('addons_storage',function(){
        	$map = ['status'=>1,'group'=>'storage'];
			return Db::name('Addons')->where($map)->value('name');
		});
        if($addons_name){
        	$addons_class = get_addon_class($addons_name);
	        if(class_exists($addons_class)){
	        	$addon = new $addons_class();
	        	$addon->put($path,$content);
	        }
        }else{
        	File::put(Env::get('runtime_path').'txt'.DIRECTORY_SEPARATOR.$path,$content);
        }
        return $path;
	}

	private function change_chapter_content($content){
		$content = str_replace(['<br>','<br\/>','<br />','　','&nbsp;'], ["\r\n","\r\n","\r\n","",""], strtolower($content));
		$content_array = preg_split('/[\r\n]+/', trim($content,"\r\n"));
		if(is_array($content_array)){
			$content = '';
			foreach ($content_array as $value) {
	    		if($value){
					$content.='<p>　　'.$value.'<p/>';
				}
	    	}
		}
		return $content;
	}

	private function nav_check_url($url){
		$validate = Validate::checkRule($url,'url');
		if(!$validate){
			return url($url);
		}else{
			return $url;
		}
	}

	private function check_pic($pic){
		if(empty($pic)){
			$pic="/public/home/images/default_cover.png";
		}
		$validate = Validate::checkRule($pic,'url');
		if(!$validate){
			return Request::domain().$pic;
		}else{
			return $pic;
		}
	}
}