athom-cli/lib/Settings/index.js

Command-line interface for Homey Apps

'use strict';

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

const Log = require('../..').Log;

const statAsync = util.promisify( fs.stat );
const readFileAsync = util.promisify( fs.readFile );
const writeFileAsync = util.promisify( fs.writeFile );
const mkdirAsync = util.promisify( fs.mkdir );

class Settings {
	
	constructor() {		
		this._settings = null;
		this._settingsPath = this._getSettingsPath();		
	}
		
	_getSettingsPath() {
		const platform = os.platform();
		
		if( platform === 'win32' )
			return path.join(process.env.APPDATA, 'athom-cli', 'settings.json');
						
		return path.join(process.env.HOME, '.athom-cli', 'settings.json');
	}
	
	async _getSettings() {
		if( this._settings ) return this._settings;
				
		try {
			let data = await readFileAsync( this._settingsPath, 'utf8' );
			let json = JSON.parse( data );
			this._settings = json;
		} catch( err ) {
			if( err.code !== 'ENOENT' ) Log( err );
			this._settings = {};
		}
	}
	
	async get( key ) {
		await this._getSettings();
		return this._settings[ key ] || null;
	}
	
	async set( key, value ) {
		await this._getSettings();
		
		this._settings[ key ] = value;
			
		// create directory if not exists	
		let dir = path.dirname( this._settingsPath );
		try {
			await statAsync(dir);
		} catch( err ) {
			if( err.code !== 'ENOENT' ) throw err;
			await mkdirAsync( dir );
		}
		
		let json = JSON.stringify(this._settings, false, 4);
		await writeFileAsync( this._settingsPath, json );
		
		return this.get( key );
		
	}
	
	async unset( key ) {
		return this.set( key, null );
	}
	
}

module.exports = Settings;