const logger = require("./cors/log").getLogger("comm.app.js");
module.exports = function (req, res, next) {
    //判断来源于接口还是来源于浏览器
    if(req.headers["x-requested-with"] == "XMLHttpRequest"){
        //来自接口
        req.isFromHttpRequest = true;
    }else{
        req.isFromHttpRequest = false;
    }

    //请求地址格式化
    if(process.env.NODE_ENV == "production"){
        req._fromUrl =  req.originalUrl;
    }else{
        req._fromUrl =  req.protocol + "://" + req.hostname + ":3001"  + req.originalUrl;
    }
    res.locals._fromUrl = encodeURIComponent( req._fromUrl);

    //判断是否来源于移动端
    var deviceAgent = req.headers["user-agent"].toLowerCase();
    var agentID = deviceAgent.match(/(iphone|ipod|ipad|android)/);
    if (agentID) {
      //"Mobile";
        req.isMobile = true;
    } else {
        // "PC";
        req.isMobile = false;
    }

    //公共的返回
    res.success = function (data) {
        res.json({
            success:true,
            data:data || '',
            message:""
        })
    };
    
    res.error = function (opt) {
        
        opt = opt || '';
        if(typeof opt == "string" ){
            res.json({
                success:false,
                message:opt || '',
                code:-1
            });
        }else if(Object.prototype.toString.call(opt) == "[object Error]"){
            //记录日志
            logger.error(opt);
            res.json({
                success:false,
                message:"服务器异常",
                code: -5
            }); 
        }else{
           // logger.error(opt);
            res.json({
                success:false,
                message:opt.message || '',
                code:opt.code || -5
            });
        }
    }

    next();
}