const fs = require('fs');
const path = require('path');


function loadJS(file, callback){
    fs.readFile(file, { encoding: 'utf-8' }, (err, data) => {
        if(err){
            console.error(err);
        }else {
            let service = eval(data);
            callback(service);
        }
    });
}


module.exports.loadService = (file, callback) => {
    let file_ext = file.match(/\.[0-9a-z]+$/i)[0];
    fs.exists(file, exists => {
        if(exists){
            fs.stat(file, (err, stats) => {
                if(err){
                    console.error(err);
                }else {
                    let modtime = stats.mtimeMs;
                    let cb = service => {
                        service = service || {};
                        service.modMs = modtime;
                        callback(service);
                    }
                    switch(file_ext){
                        case '.js': loadJS(file, cb); break;
                    }
                }
            });
        }
    });
}