/**
 * Copyright JS Foundation and other contributors, http://js.foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/


var log = require("../util").log; // TODO: separate module
var i18n = require("../util").i18n; // TODO: separate module


module.exports = {
    errorHandler: function(err,req,res,next) {
        if (err.message === "request entity too large") {
            log.error(err);
        } else {
            log.error(err.stack);
        }
        log.audit({event: "api.error",error:err.code||"unexpected_error",message:err.toString()},req);
        res.status(400).json({error:"unexpected_error", message:err.toString()});
    },

    determineLangFromHeaders: function(acceptedLanguages){
        var lang = i18n.defaultLang;
        acceptedLanguages = acceptedLanguages || [];
        if (acceptedLanguages.length >= 1) {
            lang = acceptedLanguages[0];
        }
        return lang;
    },
    rejectHandler: function(req,res,err) {
        res.status(err.status||500).json({
            code: err.code||"unexpected_error",
            message: err.message||err.toString()
        });
    }
}