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.



285
286
287
288
289
290
291
292
293
294
295
296
 
# File 'opal/stdlib/date.rb', line 285

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.



298
299
300
 
# File 'opal/stdlib/date.rb', line 298

def start
  @start
end

Class Method Details

._days_in_month(year, month) ⇒ Object 



535
536
537
538
539
540
 
# File 'opal/stdlib/date.rb', line 535

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 



2
3
4
 
# 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:



278
279
280
 
# File 'opal/stdlib/date.rb', line 278

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

.parse(string, comp = true) ⇒ Object

Raises:

  • (ArgumentError) 


28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
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
 
# File 'opal/stdlib/date.rb', line 28

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 



274
275
276
 
# File 'opal/stdlib/date.rb', line 274

def today
  wrap `new Date()`
end

.wrap(native) ⇒ Object 



21
22
23
24
25
26
 
# File 'opal/stdlib/date.rb', line 21

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

Instance Method Details

#+(date) ⇒ Object 



409
410
411
 
# File 'opal/stdlib/date.rb', line 409

def +(date)
  next_day(date)
end

#-(date) ⇒ Object 



400
401
402
403
404
405
406
407
 
# File 'opal/stdlib/date.rb', line 400

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

#<<(n) ⇒ Object 



332
333
334
335
336
 
# File 'opal/stdlib/date.rb', line 332

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

  prev_month(n)
end

#<=>(other) ⇒ Object 



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
 
# File 'opal/stdlib/date.rb', line 300

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 



326
327
328
329
330
 
# File 'opal/stdlib/date.rb', line 326

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

  self << -n
end

#as_json ⇒ Object 



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

def as_json
  to_s
end

#clone ⇒ Object 



338
339
340
341
342
 
# File 'opal/stdlib/date.rb', line 338

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

#cwday ⇒ Object 



522
523
524
 
# File 'opal/stdlib/date.rb', line 522

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

#cweek ⇒ Object 



526
527
528
529
530
531
532
533
 
# File 'opal/stdlib/date.rb', line 526

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 



518
519
520
 
# File 'opal/stdlib/date.rb', line 518

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

#jd ⇒ Object 



350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
 
# File 'opal/stdlib/date.rb', line 350

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:



386
387
388
 
# File 'opal/stdlib/date.rb', line 386

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

#new_start(start) ⇒ Object 



390
391
392
393
394
 
# File 'opal/stdlib/date.rb', line 390

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

#next ⇒ Object Also known as: succ 



396
397
398
 
# File 'opal/stdlib/date.rb', line 396

def next
  self + 1
end

#next_day(n = 1) ⇒ Object 



426
427
428
429
 
# File 'opal/stdlib/date.rb', line 426

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

#next_month(n = 1) ⇒ Object 



442
443
444
445
 
# File 'opal/stdlib/date.rb', line 442

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

#next_year(years = 1) ⇒ Object 



452
453
454
455
 
# File 'opal/stdlib/date.rb', line 452

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

#prev_day(n = 1) ⇒ Object 



413
414
415
416
417
418
419
420
421
422
423
424
 
# File 'opal/stdlib/date.rb', line 413

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 



431
432
433
434
435
436
437
438
439
440
 
# File 'opal/stdlib/date.rb', line 431

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 



447
448
449
450
 
# File 'opal/stdlib/date.rb', line 447

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 



492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
 
# File 'opal/stdlib/date.rb', line 492

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 



457
458
459
460
461
462
463
464
465
 
# File 'opal/stdlib/date.rb', line 457

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

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

#to_date ⇒ Object 



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

def to_date
  self
end

#to_datetime ⇒ Object 



484
485
486
 
# File 'opal/stdlib/date.rb', line 484

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

#to_json ⇒ Object 



195
196
197
 
# File 'opal/stdlib/json.rb', line 195

def to_json
  to_s.to_json
end

#to_n ⇒ Object 



488
489
490
 
# File 'opal/stdlib/date.rb', line 488

def to_n
  @date
end

#to_time ⇒ Object 



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

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

#upto(max, &block) ⇒ Object 



514
515
516
 
# File 'opal/stdlib/date.rb', line 514

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