muenchhausen/lib/fake/date/index.js

Produce authentic mockup fake data

"use strict";

var I18n = require("./../../i18n");

function pad(num, size) {
  var s = num + "";
  while (s.length < size) s = "0" + s;
  return s;
}



function MDate(context) {
  this.culture = context.culture;
  this.value = new Date();
  this.i18n = new I18n(this.culture, "datetimeformat").jsonLoader();
  return this;
}

/**
 * current date formated based on current culture. A custom format is optional possible.
 * JavaScript example: .now({"format" : "yyyy-MM-ddThh:mm:ss"})
 * Template example: `"now:$(date.now format:'yyyy-MM-ddThh:mm:ss')"`
 */
MDate.prototype.now = function now(context) {
  this.value = new Date();
  return {
    value: this.value,
    text: (function () {
      return dateFormater(this.value, context.format || this.i18n.shortDatePattern)
    }).bind(this)
  };
};


function minTime() {
  return new Date(1, 0, 1).getTime();
}

function maxTime() {
  return new Date(9999, 0, 1).getTime();
}

function parseMunchhauseDateTime(str) {
  var year = parseInt(str.substring(0, 4), 10);
  var month = parseInt(str.substring(4, 6), 10) - 1;
  var day = parseInt(str.substring(6, 8), 10);
  var result = new Date(year, month, day).getTime();
  return result;
}

function renderMunchhauseDateTime(dt) {
  var year = dt.getFullYear().toString();
  var month = pad((dt.getMonth() + 1).toString(), 2);
  var day = pad(dt.getDate().toString(), 2);
  var result = new Date(year, month, day).getTime();
  return result;
}

function randomDate(setup) {
  var startDate;
  var endDate;

  if (setup.min) {
    startDate = parseMunchhauseDateTime(setup.min.toString());
  } else {
    startDate = minTime();
  }
  if (setup.max) {
    endDate = parseMunchhauseDateTime(setup.max.toString());
  } else {
    endDate = maxTime();
  }

  var spaces = (endDate - startDate);
  var percentage = Math.random()
  var timestamp = Math.round(percentage * spaces);
  timestamp += startDate;

  return new Date(timestamp);
}

/**
 * random date formated based on current culture. A custom format as well as min and max dates are optional possible.
 * JavaScript example: .random({"min" : "19080901", "max" : "23450901"})
 * Template example: `"random:$(date.random min:19080901, max:23450901)"`
 */
MDate.prototype.random = function random(context) {
  this.value = randomDate(context);
  return {
    value: this.value,
    text: (function () {
      return dateFormater(this.value, context.format || this.i18n.shortDatePattern)
    }).bind(this)
  };
};



/**
 * random date in future formated based on current culture. A custom format as well as min and max dates are optional possible.
 * JavaScript example: .future()
 * Template example: `"future:$(date.future max:23450901)"`
 */
MDate.prototype.future = function future(context) {
  context.min = renderMunchhauseDateTime(new Date());
  this.value = randomDate(context);
  return {
    value: this.value,
    text: (function () {
      return dateFormater(this.value, context.format || this.i18n.shortDatePattern)
    }).bind(this)
  };
};


/**
 * random date from past formated based on current culture. A custom format as well as min and max dates are optional possible.
 * JavaScript example: .past()
 * Template example: `"past:$(date.past min:19080901)"`
 */
MDate.prototype.past = function past(context) {
  context.max = renderMunchhauseDateTime(new Date());
  this.value = randomDate(context);
  return {
    value: this.value,
    text: (function () {
      return dateFormater(this.value, context.format || this.i18n.shortDatePattern)
    }).bind(this)
  };
};

/**
 * random month name based on current culture 
 * Template example: `rnd:$(date.month)`
 */
MDate.prototype.month = function month() {
  var randomMonth = Math.round(Math.random() * 11);
  this.value = randomMonth;
  return {
    value: this.value,
    text: this._getMonth.bind(this)
  };
};



var formatDatePart = function (fragment, text, value) {
  var x = fragment;
  /*eslint-disable */
  var result;
  /*eslint-enable */
  var i = 0;
  var reg = new RegExp(text, "g");
  while ((result = reg.exec(fragment)) !== null) {
    x = x.replace(text, value[i]);
    i++;
  }
  return x;
}

var dateFormater = function (date, format) {
  var x = format;
  var year = date.getFullYear().toString();
  var month = pad(date.getMonth().toString(), 2);
  var day = pad(date.getDate().toString(), 2);
  /*  var hour = pad(date.getHours().toString(), 2);
    var minute = pad(date.getMinutes().toString(), 2);
    var second = pad(date.getSeconds().toString(), 2);*/

  x = formatDatePart(x, "y", year);
  x = formatDatePart(x, "M", month);
  x = formatDatePart(x, "d", day);
  /*  x = formatDatePart(x, "h", hour);
    x = formatDatePart(x, "m", minute);
    x = formatDatePart(x, "s", second);*/

  return x;
}



MDate.prototype._getWeekday = function _getWeekday() {
  return this.i18n.weekdays[this.value];
};

MDate.prototype._getMonth = function _getMonth() {
  return this.i18n.month[this.value];
};

/**
 * random weekday name based on current culture 
 * Template example: `rnd:$(date.weekday)`
 */
MDate.prototype.weekday = function weekday() {
  var randomDay = Math.round(Math.random() * 28);
  var date = new Date(2001, 1, randomDay)
  this.value = date.getDay();
  return {
    value: this.value,
    text: this._getWeekday.bind(this)
  };
};

module.exports = MDate;