<?php

require_once "WXBizMsgCrypt/WXBizMsgCrypt.php";

//这个类是用来处理微信消息回复相关的问题
class LewaimaiWeixinMessage {
	public static function getResponse($xmlMsg)
	{
		$msgObj = simplexml_load_string($xmlMsg, 'SimpleXMLElement', LIBXML_NOCDATA);
		if ($msgObj == false)
		{
			LewaimaiDebug::Log("Parsel XML Failed!");
			return false;
		}
		
		//公共属性
		$FromUserName = $msgObj->FromUserName;
		$ToUserName = $msgObj->ToUserName;
		$CreateTime = $msgObj->CreateTime;
		$MsgType = $msgObj->MsgType;
		$MsgId = $msgObj->MsgId;
		
		if ($MsgType == "text") 
		{
			$TextContent = trim($msgObj->Content);
			if (strlen($TextContent) == 0) 
			{
				$newResponse =  "success";
			}
			else
			{
				$newTextMsgHandle = new TextMsgHandle;
				$newTextMsgHandle->SetMsgInfo($FromUserName, $ToUserName, $CreateTime, $MsgType, $MsgId);
				
				$newTextMsgHandle->m_TextContent = $TextContent;
				
				$newResponse = $newTextMsgHandle->GetResponse();
			}
		}
		elseif ($MsgType == "event")
		{
			$Event = trim($msgObj->Event);
			$EventKey = trim($msgObj->EventKey);
				
			$Latitude = trim($msgObj->Latitude);
			$Longitude = trim($msgObj->Longitude);
			$Precision = trim($msgObj->Precision);
			
			$Ticket = trim($msgObj->Ticket);
				
			if (!empty($Event))
			{
				$newEventMsgHandle = new EventMsgHandle();
				$newEventMsgHandle->SetMsgInfo($FromUserName, $ToUserName, $CreateTime, $MsgType, $MsgId);
				
				$newEventMsgHandle->m_Event = $Event;
				$newEventMsgHandle->m_EventKey = $EventKey;
				$newEventMsgHandle->m_Latitude = $Latitude;
				$newEventMsgHandle->m_Longitude = $Longitude;
				$newEventMsgHandle->m_Precision = $Precision;
				$newEventMsgHandle->m_Ticket = $Ticket;
			
				$newResponse = $newEventMsgHandle->GetResponse();
			}
			else
			{
				$newResponse =  "success";
			}
		}
		elseif ($MsgType == "location")
		{
			$Location_X = trim($msgObj->Location_X); //腾讯接口里面这里X是维度，Y是经度
			$Location_Y = trim($msgObj->Location_Y);
			$Scale = trim($msgObj->Scale);
			$Label = trim($msgObj->Label);
				
			if (!empty($Location_X) && !empty($Location_Y))
			{
				$newLocationMsgHandle = new LocationMsgHandle();
				$newLocationMsgHandle->SetMsgInfo($FromUserName, $ToUserName, $CreateTime, $MsgType, $MsgId);
				
				$newLocationMsgHandle->m_Location_X = $Location_X;
				$newLocationMsgHandle->m_Location_Y = $Location_Y;
				$newLocationMsgHandle->m_Scale = $Scale;
				$newLocationMsgHandle->m_Label = $Label;
			
				$newResponse = $newLocationMsgHandle->GetResponse();
			}
			else
			{
				$newResponse = "success";
			}
		}
		elseif ($MsgType == "image")
		{
			$PicUrl = trim($msgObj->PicUrl);
			$MediaId = trim($msgObj->MediaId);
			
			if(!empty($PicUrl) && !empty($MediaId))
			{
				$picturereplytage = PictureReplyTage::model()->find('picurl="'.$PicUrl.'"');
				if($picturereplytage)
				{
					if($picturereplytage->time + 30 > time())
					{
						exit;
					}
					else
					{
						$picturereplytage->time = time();
						$picturereplytage->update();
					}
				}
				else
				{
					$picturereplytage = new PictureReplyTage();
					$picturereplytage->picurl = $PicUrl;
					$picturereplytage->time = time();
					$picturereplytage->save();
				}
				
				$newImageMsgHandle = new ImageMsgHandle();
				$newImageMsgHandle->SetMsgInfo($FromUserName, $ToUserName, $CreateTime, $MsgType, $MsgId);
				
				$newResponse = $newImageMsgHandle->GetResponse();
			}
			else
			{
				$newResponse = "success";
			}
		}
		elseif ($MsgType == "voice")
		{
			$format = trim($msgObj->Format);
			$MediaId = trim($msgObj->MediaId);
			
			if(!empty($format) && !empty($MediaId))
			{
				$voicereplytage = VoiceReplyTage::model()->find('media_id="'.$MediaId.'"');
				if($voicereplytage)
				{
					if($voicereplytage->time + 30 > time())
					{
						exit;
					}
					else
					{
						$voicereplytage->time = time();
						$voicereplytage->update();
					}
				}
				else
				{
					$voicereplytage = new VoiceReplyTage();
					$voicereplytage->media_id = $MediaId;
					$voicereplytage->format = $format;
					$voicereplytage->time = time();
					$voicereplytage->save();
				}
				
				$newVoiceMsgHandle = new VoiceMsgHandle();
				$newVoiceMsgHandle->SetMsgInfo($FromUserName, $ToUserName, $CreateTime, $MsgType, $MsgId);
				
				$newResponse = $newVoiceMsgHandle->GetResponse();
			}
			else
			{
				$newResponse = "success";
			}
		}
		else
		{
			$newResponse = "success";
		}
		
		if (!isset($newResponse)) 
		{
			Yii::log("MsgType:" . $MsgType);
		}
		
		return $newResponse;
	}
	
	public static function getDecryptMsg()
	{
		$msg_signature = $_GET["msg_signature"];
		$timestamp = $_GET["timestamp"];
		$nonce = $_GET["nonce"];
		 
		$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
		$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
		if ($postObj == false)
		{
			Yii::log("Parsel XML Failed!");
			echo "are u kidding?";
			exit();
		}
		 
		$encrypt = $postObj->Encrypt;
		 
		$format = "<xml><ToUserName><![CDATA[toUser]]></ToUserName><Encrypt><![CDATA[%s]]></Encrypt></xml>";
		$from_xml = sprintf($format, $encrypt);
		 
		$appId = LEWAIMAI_PINGTAI_APPID;
		$token = LEWAIMAI_PINGTAI_TOKEN;
		$encodingAesKey = LEWAIMAI_PINGTAI_ENCODINGAESKEY;
		$pc = new WXBizMsgCrypt($token, $encodingAesKey, $appId);
		 
		//第三方收到公众号平台发送的消息
		$msg = '';
		$errCode = $pc->decryptMsg($msg_signature, $timestamp, $nonce, $from_xml, $msg);
		
		return $msg;
	}
}