<?php

namespace Invite\Src;

use Dever;
use Invite\Lib\Relation;

class Api
{
	# 获取邀请码
	public function code($uid)
	{	
    	$info = Dever::db('invite/code')->one(array('uid' => $uid));
    	if ($info) {
    		return $info['value'];
    	} else {
    		$code = Dever::uid($uid);
    		return $this->createCode($uid, $code);
    	}
	}

	private function createCode($uid, $code)
	{
		$info = Dever::db('invite/code')->one(array('value' => $code));
		if ($info) {
			$code = Dever::code(6);
			return $this->createCode($uid, $code);
		} else {
			Dever::db('invite/code')->insert(array('value' => $code, 'uid' => $uid));
			return $code;
		}
	}

	# 根据邀请码获取邀请人uid
	public function getUid($code)
	{	
    	$info = Dever::db('invite/code')->one(array('value' => $code));
		if ($info) {
			return $info['uid'];
		}
		return false;
	}

	# 设置邀请关系
	public function setRelation($uid, $parent = false, $code = false)
	{
		if ($code) {
			$parent = $this->getCode($code);
		}
		if ($parent <= 0) {
			$parent = $this->getSourceUid($uid, false);
			if ($parent <= 0) {
				return false;
			}
		}
		$relation = new Relation();
		$relation->set($parent, $uid);
		return true;
	}

	# 获取某个用户的下级
	public function getChild($uid, $level = false)
	{
		$relation = new Relation();
		return $relation->getChild($uid, $level);
	}

	# 获取某个用户的上级
	public function getParent($uid, $level = 1)
	{
		$relation = new Relation();
		$info = $relation->getParent($uid, $level);
		if ($info) {
			return $info['uid'];
		}
		return false;
	}

	# 获取来源用户uid
	public function getSourceUid($uid, $error = true)
    {
        $source_signature = Dever::input('source_signature');

        if (!$source_signature) {
            if (!$error) {
                return false;
            }
            Dever::alert('错误的来源uid');
        }
        $user = Dever::loginResult($source_signature, false);
        if (!isset($user['uid'])) {
            if (!$error) {
                return false;
            }
            Dever::alert('错误的来源uid');
        }

        $source_uid = $user['uid'];

        if ($uid == $source_uid) {
        	if (!$error) {
        		return false;
        	}
            Dever::alert('来源uid和当前uid相同');
        }

        return $source_uid;
    }
}