/**
 * 公共Add方法
 * @param model 要操作資料庫的模型
 * @param conditions 增加的條件,如{id:xxx}
 * @param callback 回撥方法
 */
exports.addData = function (model, conditions, callback) {

    model.create(conditions, function (err, result) {
        if (err) {
            console.log(err);
            callback({success: 0, flag: "save data fail"
 
});
        } else {
            console.log('save success');
            callback({success: 1, flag: "save data success"});
        }
    });

}

/**
 * 公共update方法
 * @param model 要操作資料庫的模型
 * @param conditions 增加的條件,如{id:xxx}
 * @param update 更新條件{set{id:xxx}}
 * @param options
 * @param callback
 */
 

exports.updateData = function (model, conditions, update, options, callback) {

    model.update(conditions, update, options, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "update data fail"});
        } else {
            if (result.n != 0
 
) {
                console.log('update success!');
                callback({success: 1, flag: "update data success"});
            } else {
                console.log('update fail:no this data!');
                callback({success: 0, flag: 'update fail:no this data!'});
            }
        }
    });
}

/**
 * 公共remove方法
 * @param model
 * @param conditions
 * @param callback
 */
exports.removeData = function (model, conditions, callback) {

    model.remove(conditions, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "remove data fail"});
        } else {
            if (result.result.n != 0) {
                console.log('remove success!');
                callback({success: 1, flag: "remove data success"});
            } else {
                console.log('remove fail:no this data!');
                callback({success: 0, flag: 'remove fail:no this data!'});
            }

        }
    });
}

/**
 * 公共find方法 非關聯查詢
 * @param model
 * @param conditions
 * @param fields 查詢時限定的條件，如順序，某些欄位不查詢等
 * @param options
 * @param callback
 */
exports.findData = function (model, conditions, fields, options, callback) {

    var sort = options.sort == undefined ? {_id:-1} : options.sort;
    delete options.sort;
    model.find(conditions, fields, options, function (error, result) {
        if (error) {
            console.log(error);
            callback({success: 0, flag: "find data fail"});
        } else {
            if (result.length != 0) {
                console.log('find success!');
                callback({success: 1, flag: "find data success", result: result});
            } else {
                console.log('find fail:no this data!');
                callback({success: 0, flag: 'find fail:no this data!'});
            }
        }
    }).sort(sort);
}

/**
 * 公共populate find方法
 * 是關聯查詢
 * @param model
 * @param conditions
 * @param path :The field need to be refilled （需要覆蓋的欄位）
 * @param fields :select fields (name -_id,Separated by a space field,In front of the field name plus "-"said not filled in)
 * @param refmodel （關聯的欄位，有path可為null）
 * @param options
 * @param callback
 */
exports.findDataPopulation = function (model, conditions, path, fields, refmodel, options, callback) {

    model.find(conditions).populate(path, fields, refmodel, options).exec(function (err, result) {
        if (err) {
            console.log(err);
            callback({success: 0, flag: 'population find data fail'});
        } else {
            if (result.length != 0) {
                console.log('population find success!');
                callback({success: 1, flag: 'population find data success', result: result});
            } else {
                console.log('population find fail:no this data!');
                callback({success: 0, flag: 'population find fail:no this data!'});
            }
        }
    });
}