Class: Date

Inherits:
Object show all
Includes:
Comparable
Defined in:
opal/stdlib/date.rb,
opal/stdlib/json.rb

Defined Under Namespace

Classes: Infinity

Constant Summary

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

1582-10-15

2299161
ENGLAND =

1752-09-14

2361222
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)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

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

Returns a new instance of Date


351
352
353
# File 'opal/stdlib/date.rb', line 351

def initialize(year = -4712, month = 1, day = 1, start = ITALY)
  @date = `new Date(year, month - 1, day)`
end

Class Method Details

.gregorian_leap?(year) ⇒ Boolean

Returns:


346
347
348
# File 'opal/stdlib/date.rb', line 346

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

.parse(string, comp = true) ⇒ Object

Raises:

  • (ArgumentError)

96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
# File 'opal/stdlib/date.rb', line 96

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

.todayObject


342
343
344
# File 'opal/stdlib/date.rb', line 342

def today
  wrap `new Date()`
end

.wrap(native) ⇒ Object


90
91
92
93
94
# File 'opal/stdlib/date.rb', line 90

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

Instance Method Details

#+(date) ⇒ Object


371
372
373
374
375
376
377
378
379
380
381
382
# File 'opal/stdlib/date.rb', line 371

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

#-(date) ⇒ Object


355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
# File 'opal/stdlib/date.rb', line 355

def -(date)
  %x{
    if (date.$$is_number) {
      var result = #{clone};
      result.date.setDate(#@date.getDate() - date);
      return result;
    }
    else if (date.date) {
      return Math.round((#@date - #{date}.date) / (1000 * 60 * 60 * 24));
    }
    else {
      #{raise TypeError};
    }
  }
end

#<(other) ⇒ Object


384
385
386
387
388
389
390
391
# File 'opal/stdlib/date.rb', line 384

def <(other)
  %x{
    var a = #@date, b = #{other}.date;
    a.setHours(0, 0, 0, 0);
    b.setHours(0, 0, 0, 0);
    return a < b;
  }
end

#<<(n) ⇒ Object


460
461
462
463
464
465
466
467
468
# File 'opal/stdlib/date.rb', line 460

def <<(n)
  %x{
    if (!n.$$is_number) {
      #{raise TypeError};
    }

    return #{self >> `-n`};
  }
end

#<=(other) ⇒ Object


393
394
395
396
397
398
399
400
# File 'opal/stdlib/date.rb', line 393

def <=(other)
  %x{
    var a = #@date, b = #{other}.date;
    a.setHours(0, 0, 0, 0);
    b.setHours(0, 0, 0, 0);
    return a <= b;
  }
end

#<=>(other) ⇒ Object


420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
# File 'opal/stdlib/date.rb', line 420

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

    if (#{Date === other}) {
      var a = #@date, b = #{other}.date;
      a.setHours(0, 0, 0, 0);
      b.setHours(0, 0, 0, 0);

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

#>(other) ⇒ Object


402
403
404
405
406
407
408
409
# File 'opal/stdlib/date.rb', line 402

def >(other)
  %x{
    var a = #@date, b = #{other}.date;
    a.setHours(0, 0, 0, 0);
    b.setHours(0, 0, 0, 0);
    return a > b;
  }
end

#>=(other) ⇒ Object


411
412
413
414
415
416
417
418
# File 'opal/stdlib/date.rb', line 411

def >=(other)
  %x{
    var a = #@date, b = #{other}.date;
    a.setHours(0, 0, 0, 0);
    b.setHours(0, 0, 0, 0);
    return a >= b;
  }
end

#>>(n) ⇒ Object


446
447
448
449
450
451
452
453
454
455
456
457
458
# File 'opal/stdlib/date.rb', line 446

def >>(n)
  %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, days_in_month(date.getFullYear(), date.getMonth())));
    return result;
  }
end

#as_jsonObject


203
204
205
# File 'opal/stdlib/json.rb', line 203

def as_json
  to_s
end

#cloneObject


472
473
474
# File 'opal/stdlib/date.rb', line 472

def clone
  Date.wrap(`new Date(#@date.getTime())`)
end

#cwdayObject


645
646
647
# File 'opal/stdlib/date.rb', line 645

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

#cweekObject


649
650
651
652
653
654
655
656
# File 'opal/stdlib/date.rb', line 649

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

#dayObject


476
477
478
# File 'opal/stdlib/date.rb', line 476

def day
  `#@date.getDate()`
end

#downto(min, &block) ⇒ Object


629
630
631
# File 'opal/stdlib/date.rb', line 629

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

#friday?Boolean

Returns:


480
481
482
# File 'opal/stdlib/date.rb', line 480

def friday?
  wday == 5
end

#jdObject


484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
# File 'opal/stdlib/date.rb', line 484

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:


520
521
522
# File 'opal/stdlib/date.rb', line 520

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

#monday?Boolean

Returns:


524
525
526
# File 'opal/stdlib/date.rb', line 524

def monday?
  wday == 1
end

#monthObject


528
529
530
# File 'opal/stdlib/date.rb', line 528

def month
  `#@date.getMonth() + 1`
end

#nextObject Also known as: succ


532
533
534
# File 'opal/stdlib/date.rb', line 532

def next
  self + 1
end

#next_day(n = 1) ⇒ Object


536
537
538
# File 'opal/stdlib/date.rb', line 536

def next_day(n=1)
  self + n
end

#next_monthObject


540
541
542
543
544
545
546
547
548
# File 'opal/stdlib/date.rb', line 540

def next_month
  %x{
    var result = #{clone}, date = result.date, cur = date.getDate();
    date.setDate(1);
    date.setMonth(date.getMonth() + 1);
    date.setDate(Math.min(cur, days_in_month(date.getFullYear(), date.getMonth())));
    return result;
  }
end

#prev_day(n = 1) ⇒ Object


550
551
552
# File 'opal/stdlib/date.rb', line 550

def prev_day(n=1)
  self - n
end

#prev_monthObject


554
555
556
557
558
559
560
561
562
# File 'opal/stdlib/date.rb', line 554

def prev_month
  %x{
    var result = #{clone}, date = result.date, cur = date.getDate();
    date.setDate(1);
    date.setMonth(date.getMonth() - 1);
    date.setDate(Math.min(cur, days_in_month(date.getFullYear(), date.getMonth())));
    return result;
  }
end

#saturday?Boolean

Returns:


564
565
566
# File 'opal/stdlib/date.rb', line 564

def saturday?
  wday == 6
end

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


601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
# File 'opal/stdlib/date.rb', line 601

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

  if (steps_count * step) < 0
    steps = []
  else
    if steps_count < 0
      steps = (0..-steps_count).step(step.abs).map { |i| -i } .reverse
    else
      steps = (0..steps_count).step(step.abs)
    end
  end

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


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

#strftime(format = '') ⇒ Object


568
569
570
571
572
573
574
575
576
# File 'opal/stdlib/date.rb', line 568

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

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

#sunday?Boolean

Returns:


580
581
582
# File 'opal/stdlib/date.rb', line 580

def sunday?
  wday == 0
end

#thursday?Boolean

Returns:


584
585
586
# File 'opal/stdlib/date.rb', line 584

def thursday?
  wday == 4
end

#to_jsonObject


199
200
201
# File 'opal/stdlib/json.rb', line 199

def to_json
  to_s.to_json
end

#to_sObject


588
589
590
591
592
593
594
595
# File 'opal/stdlib/date.rb', line 588

def to_s
  %x{
    var d = #@date, year = d.getFullYear(), month = d.getMonth() + 1, day = d.getDate();
    if (month < 10) { month = '0' + month; }
    if (day < 10) { day = '0' + day; }
    return year + '-' + month + '-' + day;
  }
end

#tuesday?Boolean

Returns:


597
598
599
# File 'opal/stdlib/date.rb', line 597

def tuesday?
  wday == 2
end

#upto(max, &block) ⇒ Object


625
626
627
# File 'opal/stdlib/date.rb', line 625

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

#wdayObject


633
634
635
# File 'opal/stdlib/date.rb', line 633

def wday
  `#@date.getDay()`
end

#wednesday?Boolean

Returns:


637
638
639
# File 'opal/stdlib/date.rb', line 637

def wednesday?
  wday == 3
end

#yearObject


641
642
643
# File 'opal/stdlib/date.rb', line 641

def year
  `#@date.getFullYear()`
end