index.js

#!/usr/bin/env node
const clim8Pkg = require("./package.json");
const clim8Program = require("commander");

const Weather = require("./lib/Weather");
const weather = new Weather();

const EXIT_ERROR = 1;

// clim8 program
clim8Program
    .version(clim8Pkg.version)
    .usage("[options] <option>")
    .option("-C, --city [city]", "provide city")
    .option("-S, --citystate [city,state]", "provide city and state", items => items.split(","))
    .option("-L, --coordinates [latitude,longitude]", "provide latitude and longitude", items => items.split(","))
    .parse(process.argv);

if (clim8Program.city) weather.getCurrentWeatherByCity(clim8Program.city);
else if (clim8Program.citystate) {
    if (clim8Program.citystate.length !== 2) {
        console.log("City and state are mandatory, example: London,Uk");
        process.exit(EXIT_ERROR);
    }

    weather.getCurrentWeatherByCityAndState(clim8Program.citystate[0], clim8Program.citystate[1]);
} else if (clim8Program.coordinates) {
    if (clim8Program.coordinates.length !== 2) {
        console.log("Latitude and Longitude are mandatory, example: 44.4949,11.3426");
        process.exit(EXIT_ERROR);
    }

    weather.getCurrentWeatherByCoordinates(clim8Program.coordinates[0], clim8Program.coordinates[1]);
} else console.log("Confused? Do you need some help? clim8 --help");