linespin/lib/linespin.js

Simple progress output

/*
  Linespin - Simple Progress Output
 */
'use strict';
var Linespin, c;

c = require('./color');

Linespin = (function() {
  var _continue, _errorMessage, _i, _lastMessage, _message, _pendingMessage, _prettify, _reset, _speed, _spin, _spinner, _spinnerMessage, _stdout, _successMessage, _warningMessage;

  _speed = void 0;

  _stdout = process.stdout;

  _spin = ['-', '\\', '|', '/'];

  _i = 0;

  function Linespin(message, doneMessage, speed) {
    this.message = message;
    this.doneMessage = doneMessage;
    this.speed = speed;
    this.state = 'stopped';
    if (this.message == null) {
      this.message = 'Please wait...';
    }
    if (this.doneMessage == null) {
      this.doneMessage = 'Finished';
    }
    if (this.speed == null) {
      this.speed = 200;
    }
  }

  Linespin.prototype.start = function() {
    if (this.state === 'stopped') {
      this.state = 'running';
      _stdout.write("\n");
    }
    _spinnerMessage(this.message);
    return _continue(this);
  };

  Linespin.prototype.stop = function(message) {
    this.state = 'stopped';
    _reset();
    return _lastMessage(message || this.doneMessage);
  };

  Linespin.prototype.pending = function(message) {
    return _pendingMessage(message);
  };

  Linespin.prototype.success = function(message) {
    return _successMessage(message);
  };

  Linespin.prototype.error = function(message) {
    return _errorMessage(message);
  };

  Linespin.prototype.warn = function(message) {
    return _warningMessage(message);
  };

  Linespin.prototype.msg = function(message) {
    return _message(message);
  };

  _reset = function() {
    return _i = 0;
  };

  _continue = function(_this) {
    var that;
    that = _this;
    return setTimeout(function() {
      if (that.state === 'running') {
        return that.start();
      }
    }, that.speed);
  };

  _spinner = function() {
    return "" + _spin[_i = (_i + 1) % 4];
  };

  _prettify = function(message, symbol, newline, replace, color1, color2) {
    var bump, override;
    if (color2 == null) {
      color2 = color1;
    }
    bump = newline ? "\n\n" : "\n";
    override = replace ? "" + c.rewrite + c.rewrite : c.rewrite;
    return _stdout.write("" + override + c[color1] + "[" + symbol + "] " + c[color2] + message + c.reset + bump);
  };

  _spinnerMessage = function(message) {
    return _prettify(message, _spinner(), false, false, 'yellow', 'blue');
  };

  _lastMessage = function(message) {
    return _prettify(message, '✓', false, false, 'green', 'blue');
  };

  _successMessage = function(message) {
    return _prettify(message, '✓', true, true, 'green', 'grey');
  };

  _pendingMessage = function(message) {
    return _prettify(message, '?', true, false, 'blue', 'white');
  };

  _message = function(message) {
    return _prettify(message, '•', true, false, 'white');
  };

  _errorMessage = function(message) {
    return _prettify(message, '!', true, false, 'red');
  };

  _warningMessage = function(message) {
    return _prettify(message, '!', true, false, 'yellow');
  };

  return Linespin;

})();

module.exports = Linespin;