Class: Date

Inherits:
Object show all
Extended by:
Forwardable
Includes:
Comparable
Defined in:
opal/stdlib/date.rb,
opal/stdlib/json.rb,
opal/stdlib/date/infinity.rb,
opal/stdlib/date/formatters.rb

Direct Known Subclasses

DateTime

Defined Under Namespace

Classes: Infinity

Constant Summary collapse

JULIAN = 
Infinity.new
GREGORIAN = 
-Infinity.new
ITALY =

1582-10-15

2_299_161
ENGLAND =

1752-09-14

2_361_222
MONTHNAMES = 
[nil] + %w[January February March April May June July August September October November December]
ABBR_MONTHNAMES = 
%w[jan feb mar apr may jun jul aug sep oct nov dec]
DAYNAMES = 
%w[Sunday Monday Tuesday Wednesday Thursday Friday Saturday]
ABBR_DAYNAMES = 
%w[Sun Mon Tue Wed Thu Fri Sat]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Forwardable

def_instance_delegator, def_instance_delegators, instance_delegate

Constructor Details

#initialize(year = -4712,, month = 1, day = 1, start = ITALY) ⇒ Date

Returns a new instance of Date.



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# File 'opal/stdlib/date.rb', line 283

def initialize(year = -4712, month = 1, day = 1, start = ITALY)
  %x{
    // Because of Gregorian reform calendar goes from 1582-10-04 to 1582-10-15.
    // All days in between end up as 4 october.
    if (year === 1582 && month === 10 && day > 4 && day < 15) {
      day = 4;
    }
  }

  @date = `new Date(year, month - 1, day)`
  @start = start
end

Instance Attribute Details

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'opal/stdlib/date.rb', line 296

def start
  @start
end

Class Method Details

._days_in_month(year, month) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 533

def self._days_in_month(year, month)
  %x{
    var leap = ((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0);
    return [31, (leap ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
  }
end

.def_formatter(*args, **kwargs) ⇒ Object 



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# File 'opal/stdlib/date/formatters.rb', line 2

def self.def_formatter(*args, **kwargs)
  Time.def_formatter(*args, **kwargs, on: self)
end

.gregorian_leap?(year) ⇒ Boolean

Returns:



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# File 'opal/stdlib/date.rb', line 276

def gregorian_leap?(year)
  `(new Date(#{year}, 1, 29).getMonth()-1) === 0`
end

.parse(string, comp = true) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'opal/stdlib/date.rb', line 26

def parse(string, comp = true)
  %x{
    var current_date = new Date();

    var current_day = current_date.getDate(),
        current_month = current_date.getMonth(),
        current_year = current_date.getFullYear(),
        current_wday = current_date.getDay(),
        full_month_name_regexp = #{MONTHNAMES.compact.join('|')};

    function match1(match) { return match[1]; }
    function match2(match) { return match[2]; }
    function match3(match) { return match[3]; }
    function match4(match) { return match[4]; }

    // Converts passed short year (0..99)
    // to a 4-digits year in the range (1969..2068)
    function fromShortYear(fn) {
      return function(match) {
        var short_year = fn(match);

        if (short_year >= 69) {
          short_year += 1900;
        } else {
          short_year += 2000;
        }
        return short_year;
      }
    }

    // Converts month abbr (nov) to a month number
    function fromMonthAbbr(fn) {
      return function(match) {
        var abbr = fn(match).toLowerCase();
        return #{ABBR_MONTHNAMES}.indexOf(abbr) + 1;
      }
    }

    function toInt(fn) {
      return function(match) {
        var value = fn(match);
        return parseInt(value, 10);
      }
    }

    // Depending on the 'comp' value appends 20xx to a passed year
    function to2000(fn) {
      return function(match) {
        var value = fn(match);
        if (comp) {
          return value + 2000;
        } else {
          return value;
        }
      }
    }

    // Converts passed week day name to a day number
    function fromDayName(fn) {
      return function(match) {
        var dayname = fn(match),
            wday = #{DAYNAMES.map(&:downcase)}.indexOf(#{`dayname`.downcase});

        return current_day - current_wday + wday;
      }
    }

    // Converts passed month name to a month number
    function fromFullMonthName(fn) {
      return function(match) {
        var month_name = fn(match);
        return #{MONTHNAMES.compact.map(&:downcase)}.indexOf(#{`month_name`.downcase}) + 1;
      }
    }

    var rules = [
      {
        // DD as month day number
        regexp: /^(\d{2})$/,
        year: current_year,
        month: current_month,
        day: toInt(match1)
      },
      {
        // DDD as year day number
        regexp: /^(\d{3})$/,
        year: current_year,
        month: 0,
        day: toInt(match1)
      },
      {
        // MMDD as month and day
        regexp: /^(\d{2})(\d{2})$/,
        year: current_year,
        month: toInt(match1),
        day: toInt(match2)
      },
      {
        // YYDDD as year and day number in 1969--2068
        regexp: /^(\d{2})(\d{3})$/,
        year: fromShortYear(toInt(match1)),
        month: 0,
        day: toInt(match2)
      },
      {
        // YYMMDD as year, month and day in 1969--2068
        regexp: /^(\d{2})(\d{2})(\d{2})$/,
        year: fromShortYear(toInt(match1)),
        month: toInt(match2),
        day: toInt(match3)
      },
      {
        // YYYYDDD as year and day number
        regexp: /^(\d{4})(\d{3})$/,
        year: toInt(match1),
        month: 0,
        day: toInt(match2)
      },
      {
        // YYYYMMDD as year, month and day number
        regexp: /^(\d{4})(\d{2})(\d{2})$/,
        year: toInt(match1),
        month: toInt(match2),
        day: toInt(match3)
      },
      {
        // mmm YYYY
        regexp: /^([a-z]{3})[\s\.\/\-](\d{3,4})$/,
        year: toInt(match2),
        month: fromMonthAbbr(match1),
        day: 1
      },
      {
        // DD mmm YYYY
        regexp: /^(\d{1,2})[\s\.\/\-]([a-z]{3})[\s\.\/\-](\d{3,4})$/i,
        year: toInt(match3),
        month: fromMonthAbbr(match2),
        day: toInt(match1)
      },
      {
        // mmm DD YYYY
        regexp: /^([a-z]{3})[\s\.\/\-](\d{1,2})[\s\.\/\-](\d{3,4})$/i,
        year: toInt(match3),
        month: fromMonthAbbr(match1),
        day: toInt(match2)
      },
      {
        // YYYY mmm DD
        regexp: /^(\d{3,4})[\s\.\/\-]([a-z]{3})[\s\.\/\-](\d{1,2})$/i,
        year: toInt(match1),
        month: fromMonthAbbr(match2),
        day: toInt(match3)
      },
      {
        // YYYY-MM-DD YYYY/MM/DD YYYY.MM.DD
        regexp: /^(\-?\d{3,4})[\s\.\/\-](\d{1,2})[\s\.\/\-](\d{1,2})$/,
        year: toInt(match1),
        month: toInt(match2),
        day: toInt(match3)
      },
      {
        // YY-MM-DD
        regexp: /^(\d{2})[\s\.\/\-](\d{1,2})[\s\.\/\-](\d{1,2})$/,
        year: to2000(toInt(match1)),
        month: toInt(match2),
        day: toInt(match3)
      },
      {
        // DD-MM-YYYY
        regexp: /^(\d{1,2})[\s\.\/\-](\d{1,2})[\s\.\/\-](\-?\d{3,4})$/,
        year: toInt(match3),
        month: toInt(match2),
        day: toInt(match1)
      },
      {
        // ddd
        regexp: new RegExp("^(" + #{DAYNAMES.join('|')} + ")$", 'i'),
        year: current_year,
        month: current_month,
        day: fromDayName(match1)
      },
      {
        // monthname daynumber YYYY
        regexp: new RegExp("^(" + full_month_name_regexp + ")[\\s\\.\\/\\-](\\d{1,2})(th|nd|rd)[\\s\\.\\/\\-](\\-?\\d{3,4})$", "i"),
        year: toInt(match4),
        month: fromFullMonthName(match1),
        day: toInt(match2)
      },
      {
        // monthname daynumber
        regexp: new RegExp("^(" + full_month_name_regexp + ")[\\s\\.\\/\\-](\\d{1,2})(th|nd|rd)", "i"),
        year: current_year,
        month: fromFullMonthName(match1),
        day: toInt(match2)
      },
      {
        // daynumber monthname YYYY
        regexp: new RegExp("^(\\d{1,2})(th|nd|rd)[\\s\\.\\/\\-](" + full_month_name_regexp + ")[\\s\\.\\/\\-](\\-?\\d{3,4})$", "i"),
        year: toInt(match4),
        month: fromFullMonthName(match3),
        day: toInt(match1)
      },
      {
        // YYYY monthname daynumber
        regexp: new RegExp("^(\\-?\\d{3,4})[\\s\\.\\/\\-](" + full_month_name_regexp + ")[\\s\\.\\/\\-](\\d{1,2})(th|nd|rd)$", "i"),
        year: toInt(match1),
        month: fromFullMonthName(match2),
        day: toInt(match3)
      }
    ]

    var rule, i, match;

    for (i = 0; i < rules.length; i++) {
      rule = rules[i];
      match = rule.regexp.exec(string);
      if (match) {
        var year = rule.year;
        if (typeof(year) === 'function') {
          year = year(match);
        }

        var month = rule.month;
        if (typeof(month) === 'function') {
          month = month(match) - 1
        }

        var day = rule.day;
        if (typeof(day) === 'function') {
          day = day(match);
        }

        var result = new Date(year, month, day);

        // an edge case, JS can't handle 'new Date(1)', minimal year is 1970
        if (year >= 0 && year <= 1970) {
          result.setFullYear(year);
        }

        return #{wrap `result`};
      }
    }
  }
  raise ArgumentError, 'invalid date'
end

.today ⇒ Object 



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# File 'opal/stdlib/date.rb', line 272

def today
  wrap `new Date()`
end

.wrap(native) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 19

def wrap(native)
  instance = allocate
  `#{instance}.start = #{ITALY}`
  `#{instance}.date = #{native}`
  instance
end

Instance Method Details

#+(date) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 407

def +(date)
  next_day(date)
end

#-(date) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 398

def -(date)
  %x{
    if (date.date) {
      return Math.round((#{@date} - #{date}.date) / (1000 * 60 * 60 * 24));
    }
  }
  prev_day(date)
end

#<<(n) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 330

def <<(n)
  `if (!n.$$is_number) #{raise ::TypeError}`

  prev_month(n)
end

#<=>(other) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 298

def <=>(other)
  %x{
    if (other.$$is_number) {
      return #{jd <=> other}
    }

    if (#{::Date === other}) {
      var a = #{@date}, b = #{other}.date;
      if (!Opal.is_a(#{self}, #{::DateTime})) a.setHours(0, 0, 0, 0);
      if (!Opal.is_a(#{other}, #{::DateTime})) b.setHours(0, 0, 0, 0);

      if (a < b) {
        return -1;
      }
      else if (a > b) {
        return 1;
      }
      else {
        return 0;
      }
    } else {
      return nil;
    }
  }
end

#>>(n) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 324

def >>(n)
  `if (!n.$$is_number) #{raise ::TypeError}`

  self << -n
end

#as_json ⇒ Object 



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# File 'opal/stdlib/json.rb', line 205

def as_json
  to_s
end

#clone ⇒ Object 



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# File 'opal/stdlib/date.rb', line 336

def clone
  date = Date.wrap(@date.dup)
  `date.start = #{@start}`
  date
end

#cwday ⇒ Object 



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# File 'opal/stdlib/date.rb', line 520

def cwday
  `#{@date}.getDay() || 7`
end

#cweek ⇒ Object 



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# File 'opal/stdlib/date.rb', line 524

def cweek
  %x{
    var d = new Date(#{@date});
    d.setHours(0,0,0);
    d.setDate(d.getDate()+4-(d.getDay()||7));
    return Math.ceil((((d-new Date(d.getFullYear(),0,1))/8.64e7)+1)/7);
  }
end

#downto(min, &block) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 516

def downto(min, &block)
  step(min, -1, &block)
end

#jd ⇒ Object 



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# File 'opal/stdlib/date.rb', line 348

def jd
  %x{
  //Adapted from http://www.physics.sfasu.edu/astro/javascript/julianday.html

  var mm = #{@date}.getMonth() + 1,
      dd = #{@date}.getDate(),
      yy = #{@date}.getFullYear(),
      hr = 12, mn = 0, sc = 0,
      ggg, s, a, j1, jd;

  hr = hr + (mn / 60) + (sc/3600);

  ggg = 1;
  if (yy <= 1585) {
    ggg = 0;
  }

  jd = -1 * Math.floor(7 * (Math.floor((mm + 9) / 12) + yy) / 4);

  s = 1;
  if ((mm - 9) < 0) {
    s =- 1;
  }

  a = Math.abs(mm - 9);
  j1 = Math.floor(yy + s * Math.floor(a / 7));
  j1 = -1 * Math.floor((Math.floor(j1 / 100) + 1) * 3 / 4);

  jd = jd + Math.floor(275 * mm / 9) + dd + (ggg * j1);
  jd = jd + 1721027 + 2 * ggg + 367 * yy - 0.5;
  jd = jd + (hr / 24);

  return jd;
  }
end

#julian? ⇒ Boolean

Returns:



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# File 'opal/stdlib/date.rb', line 384

def julian?
  `#{@date} < new Date(1582, 10 - 1, 15, 12)`
end

#new_start(start) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 388

def new_start(start)
  new_date = clone
  `new_date.start = start`
  new_date
end

#next ⇒ Object Also known as: succ 



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# File 'opal/stdlib/date.rb', line 394

def next
  self + 1
end

#next_day(n = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 424

def next_day(n = 1)
  `if (!n.$$is_number) #{raise ::TypeError}`
  prev_day(-n)
end

#next_month(n = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 440

def next_month(n = 1)
  `if (!n.$$is_number) #{raise ::TypeError}`
  prev_month(-n)
end

#next_year(years = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 450

def next_year(years = 1)
  `if (!years.$$is_number) #{raise ::TypeError}`
  prev_year(-years)
end

#prev_day(n = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 411

def prev_day(n = 1)
  %x{
    if (n.$$is_number) {
      var result = #{clone};
      result.date.setDate(#{@date}.getDate() - n);
      return result;
    }
    else {
      #{raise ::TypeError};
    }
  }
end

#prev_month(n = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 429

def prev_month(n = 1)
  %x{
    if (!n.$$is_number) #{raise ::TypeError}
    var result = #{clone}, date = result.date, cur = date.getDate();
    date.setDate(1);
    date.setMonth(date.getMonth() - n);
    date.setDate(Math.min(cur, #{Date._days_in_month(`date.getFullYear()`, `date.getMonth()`)}));
    return result;
  }
end

#prev_year(years = 1) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 445

def prev_year(years = 1)
  `if (!years.$$is_number) #{raise ::TypeError}`
  self.class.new(year - years, month, day)
end

#step(limit, step = 1, &block) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 490

def step(limit, step = 1, &block)
  steps_count = (limit - self).to_i

  steps = if steps_count * step < 0
            []
          elsif steps_count < 0
            (0..-steps_count).step(step.abs).map(&:-@).reverse
          else
            (0..steps_count).step(step.abs)
          end

  result = steps.map { |i| self + i }


  if block_given?
    result.each { |i| yield(i) }
    self
  else
    result
  end
end

#strftime(format = '') ⇒ Object 



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# File 'opal/stdlib/date.rb', line 455

def strftime(format = '')
  %x{
    if (format == '') {
      return #{to_s};
    }

    return #{@date.strftime(format)}
  }
end

#to_date ⇒ Object 



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# File 'opal/stdlib/date.rb', line 478

def to_date
  self
end

#to_datetime ⇒ Object 



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# File 'opal/stdlib/date.rb', line 482

def to_datetime
  DateTime.new(year, month, day)
end

#to_json ⇒ Object 



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# File 'opal/stdlib/json.rb', line 201

def to_json
  to_s.to_json
end

#to_n ⇒ Object 



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# File 'opal/stdlib/date.rb', line 486

def to_n
  @date
end

#to_time ⇒ Object 



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# File 'opal/stdlib/date.rb', line 474

def to_time
  Time.new(year, month, day)
end

#upto(max, &block) ⇒ Object 



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# File 'opal/stdlib/date.rb', line 512

def upto(max, &block)
  step(max, 1, &block)
end