node-notifier/bin.js

#!/usr/bin/env node

var Notification = require('./').Notification;
var minimist = require('minimist');
var usage = require('cli-usage');

var aliases = {
  'help': 'h',
  'title': 't',
  'subtitle': 'st',
  'message': 'm',
  'icon': 'i',
  'sound': 's',
  'open': 'o',
  'port': 'p',
};

var argv = minimist(process.argv.slice(2), {
  alias: aliases,
  string: ['icon', 'message', 'open', 'subtitle', 'title', 'host', 'port']
});

readme(aliases, ['host']);

var validOpts = Object.keys(aliases).concat('host');
var passedOptions = getOptionsIfExists(validOpts, argv);
var stdinMessage = '';

if (process.stdin.isTTY) {
  doNotification(passedOptions);
} else {
  process.stdin.resume();
  process.stdin.setEncoding('utf8');
  process.stdin.on('data', function(data) {
    if (data) {
      stdinMessage += data;
    } else {
      doNotification(passedOptions);
      this.end();
      return;
    }
  });
  process.stdin.on('end', function(){
    if (stdinMessage) {
      passedOptions.message = stdinMessage;
    }
    doNotification(passedOptions);
  });
}

function doNotification (options) {
  var notifier = new Notification(options);
  if (!options.message) {
    // Do not show an empty message
    process.exit(0);
  }
  notifier.notify(options, function (err, msg) {
    if (err) {
      console.error(err.message);
      process.exit(1);
    }

    if (!msg) return;
    console.log(msg);
    process.exit(0);
  });
}

function getOptionsIfExists(optionTypes, argv) {
  var options = {};
  optionTypes.forEach(function (key) {
    if (key && argv[key]) {
      options[key] = argv[key];
    }
  });
  return options;
}

function readme(input, extra) {
  var str = '# notify\n \n## Options\n' + params(input, extra) + '\n\n';
  str += '## Example\n```shell\n';
  str += '$ notify -t "Hello" -m "My Message" -s --open http://github.com\n';
  str += '$ notify -t "Agent Coulson" --icon https://raw.githubusercontent.com/mikaelbr/node-notifier/master/example/coulson.jpg \n';
  str += '$ notify -m "My Message" -s Glass\n';
  str += '$ echo "My Message" | notify -t "Hello"```\n\n';
  usage(str);
}

function params(input, extra) {
  var withAlias = Object.keys(input).reduce(function (acc, key) {
    return acc + ' * --' + key + ' (alias -' + input[key] + ')\n';
  }, '');

  if (!extra) return withAlias;

  return withAlias + extra.reduce(function (acc, key) {
    return acc + ' * --' + key + '\n';
  }, '')
}