index.js

#!/usr/bin/env node
'use strict';

const meow = require('meow');
const linky = require('@bokub/linky');
const chalk = require('chalk');
const ora = require('ora');

const display = require('./src/display');
const inquire = require('./src/inquire');
const save = require('./src/save');
const validate = require('./src/validate');

const c = meow(`
    Usage
      $ linky [(hour|day|month|year)] [options]

    Options
      --user        -u    Linky client area e-mail
      --password    -p    Linky client area password
      --output      -o    Export data to JSON file
      --start       -s    Start of the custom time period (DD/MM/YYYY)
      --end         -e    End of the custom time period (DD/MM/YYYY)

    Examples
      $ linky
      $ linky year
      $ linky month -u me@example.com
      $ linky day -s 24/08/2018 -e 06/09/2018
      $ linky hour -u me@example.com -p password123 -o ../export/hourly-data.json
`, {
	description: false,
	flags: {
		user: {type: 'string', alias: 'u'},
		password: {type: 'string', alias: 'p'},
		output: {type: 'string', alias: 'o'},
		start: {type: 'string', alias: 's'},
		end: {type: 'string', alias: 'e'}
	}
});

main(c).catch(err => {
	console.error(chalk.red(err));
	process.exit(1);
});

async function main(cli) {
	await inquire(cli);

	const validationResult = validate(cli);
	if (validationResult.error) {
		console.error(chalk.red(validationResult.message));
		cli.showHelp();
		process.exit(1);
	}

	let data = null;
	const spinner = ora().start('Retrieving consumption');
	try {
		data = await getData(cli);
		spinner.succeed('Consumption retrieved');
	} catch (e) {
		spinner.fail('Cannot retrieve consumption');
		throw (e);
	}
	if (cli.flags.output) {
		spinner.start('Saving to file');
		try {
			await save(data, cli.flags.output);
			spinner.succeed('Saved to ' + cli.flags.output);
		} catch (e) {
			spinner.fail('Cannot save data to file');
			throw (e);
		}
	}

	display(data);
}

async function getData(i) {
	const session = await linky.login(i.flags.user, i.flags.password);
	let data;
	switch (i.input[0]) {
		case 'hour':
			data = await session.getHourlyData(i.flags);
			break;
		case 'day':
			data = await session.getDailyData(i.flags);
			break;
		case 'month':
			data = await session.getMonthlyData(i.flags);
			break;
		case 'year':
			data = await session.getYearlyData(i.flags);
			break;
		default:
			throw new Error(`Unknown resource: ${i.input[0]}`);
	}
	return data;
}