<?php
/**
 * Heihe 黑河项目通用类
 */
 
class Heihe
{
	
	private $db;//传入PDO对象
	
	//使用到的公共变量
	public $tbl_heiheproject = "heiheproject" ;		//黑河项目表
	public $tbl_heiheuser = "heiheuser";	//黑河用户表
	public $project_status;		//汇交项目计划状态
	
	function __construct($db)
	{
		$this->db = $db;
		
		$this->project_status = array(
			0 => "计划未提交",
			1 => "计划未审核",
			2 => "跟踪专家审核",
			3 => "跟踪专家通过",
			4 => "数据委员会通过"
		);
		
	}
	
	
	//获取汇交状态
	public function getStatus($code){
		
		$status = $this->project_status;
		
		if(isset($status[$code]))
		{
			return $status[$code];
		}

	}
	
	//改变状态
	public function ChangeStatus($p,$s){
		
		$sql = "UPDATE ".$this->tbl_heiheproject." SET status=? WHERE id=?";
		
		$sth = $this->db->prepare($sql);
		
		$rs = $sth->execute(array($s,$p));
		
		return $rs;
		
	}
	
	//专家激活
	public function expertActive($pid,$code,$email)
	{
		
		if(empty($pid))
		{
			return 1;
		}
		
		if(!is_numeric($pid))
		{
			return 1;
		}
		
		if(!preg_match("/[A-Za-z0-9]/",$code))
		{
			return 1;
		}
		
		if(strlen($code) != 12)
		{
			return 1;
		}
		
		$validation = $this->makeValidation($email);
		
		if($code != $validation)
		{
			return 5;
		}
		
		$experts = $this->expertRead($pid);
		
		if(!is_array($experts))
		{
			return 10;
		}

		$matched = false;
		$match_expert = "";
		foreach($experts as $k=>$v)
		{
			if($v['validation'] == $code)
			{
				$matched = true;
				$match_expert = $v;
				unset($experts[$k]);
				break;
			}
		}
		
		if($matched != true)
		{
			return 15;
		}
		
		if(isset($match_expert['activated']))
		{
			if(strtotime($match_expert['activated']) < time())
			{
				return 20;
			}
		}
		
		$match_expert['activated'] = date("Y-m-d H:i:s",time());
		
		$experts[] = $match_expert;
		
		$experts = json_encode($experts);
		
		$this->expertUpdate($pid,$experts);
		
		return 200;
		
	}

	public function expertActiveError($level){
		
		$errors = array(
			1 => "参数错误",
			5 => "您的验证码不正确",
			10 => "此项目尚未邀请任何专家",
			15 => "您没有被邀请，请联系数据中心进行核实",
			20 => "您的邀请已经激活",
			50 => "服务器错误，请刷新页面重试",
			200 => "激活成功",
		);
		if(isset($errors[$level]))
		return $errors[$level];
		else
		return "发生意外错误，请重试";
		
	}
	
	//邀请一个专家
	/*
	$data = array(
		"name"=>'',		//专家姓名
		"email"=>'',	//专家email
		"created"=>'',	//邀请时间
		"validation"=>'',	//验证码
		"activated"=>''		//激活时间
	)	
	*/
	public function expertAdd($pid,$data){
		
		if(!is_array($data))
		{
			return 0;
		}
		
		$experts = $this->expertRead($pid);

		if(!is_array($experts))
		{
			$experts = array($data);
		}else{
			foreach($experts as $k=>$v)
			{
				if($v['email'] == $data['email'])
				{
					return -1;
				}
			}
			$experts[] = $data;
		}
		
		$experts = json_encode($experts,JSON_NUMERIC_CHECK);
		
		return $this->expertUpdate($pid,$experts);
		
	}
	
	//移除一个专家
	public function expertRemove($pid,$email){
		
		if(empty($pid) || empty($email))
		{
			return 0;
		}
		
		$experts = $this->expertRead($pid);
		
		if(!is_array($experts))
		{
			return -1;
		}else{
			foreach($experts as $k=>$v)
			{
				if(isset($v['email']) && $v['email'] == $email)
				{
					unset($experts[$k]);
				}
			}
		}
		$experts = json_encode($experts);
			
		return $this->expertUpdate($pid,$experts);
	}
	
	//更新专家
	public function expertUpdate($pid,$obj){
		
		$sql = "UPDATE ".$this->tbl_heiheproject." SET expert='$obj' WHERE id=$pid";
		$rs = $this->db->exec($sql);
		return $rs;
		
	}
	
	//读取已有的专家
	public function expertRead($pid){
		
		if(!is_numeric($pid))
		{
			return NULL;
		}
		
		$sql = "SELECT expert FROM ".$this->tbl_heiheproject." WHERE id=$pid";
		$rs = $this->db->query($sql);
		$row = $rs->fetch();
		
		$expert = $row['expert'];
		
		if(empty($expert))
		{
			return NULL;
		}
		
		$expert = json_decode($expert,true);
		
		if(count($expert)<1)
		{
			return 0;
		}else{
			return $expert;
		}
		
	}
	
	//邀请码
	public function makeValidation($email){
		return substr(md5($email),5,12);
	}

	//生成邀请连接
	public function makeInviteLink($pid,$code)
	{
		$http_base = "http://".$_SERVER ['HTTP_HOST'];
		$url = $http_base."/heihe/projects/invite/".$code.'/pid/'.$pid;
		return $url;
	}//生成邀请连接
	
	
	//从pgsql读取数组并拆分为php数组
	public function getArray($str){
		if(strlen($str)>3)
		{
			return explode(",",substr($str,1,-1));
		}else{
			return NULL;
		}
	}
	
	//将php数组组装成pgsql中的数组
	public function mkArray($array){
		if(!is_array($array))
		{
			return "{".$array."}";
		}
		if(count($array)==1)
		{
			$key = max(array_keys($array));
			return "{".$array[$key]."}";
		}
		if(count($array)>1)
		{
			return "{".join(",",$array)."}";
		}
	}
	
	//从数组中获得键名
	public function getKey($array,$needle)
	{
		foreach($array as $k=>$v)
		{
			if($v == $needle)
			{
				return $k;
			}
		}
	}

}