Class: Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/timetwister/parser.rb

Class Method Summary collapse

Class Method Details

.add_full_dates ⇒ Object

enrich the final output hash with more comprehensive date metadata



932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
 
# File 'lib/timetwister/parser.rb', line 932

def self.add_full_dates
  if @dates[:date_start] && !@dates[:date_start_full]
    if @dates[:date_start].match(/\d{4}\-\d{2}\-\d{2}/)
      @dates[:date_start_full] = @dates[:date_start]
    elsif @dates[:date_start].match(/\d{4}\-\d{2}/)
      @dates[:date_start_full] = @dates[:date_start] + "-01"
    elsif @dates[:date_start].match(/\d{4}/)
      @dates[:date_start_full] = @dates[:date_start] + "-01-01"
    end
  end
  if @dates[:date_end] && !@dates[:date_end_full]
    if @dates[:date_end].match(/\d{4}\-\d{2}\-\d{2}/)
      @dates[:date_end_full] = @dates[:date_end]
    else
      year = @dates[:date_end].match(/^\d{4}/).to_s
      if @dates[:date_end].match(/\d{4}\-\d{2}/)
        month = @dates[:date_end].match(/\d{2}$/).to_s
        day = Utilities.days_in_month(month,year).to_s
        @dates[:date_end_full] = @dates[:date_end] + "-#{day}"
      elsif @dates[:date_end].match(/\d{4}/)
        @dates[:date_end_full] = @dates[:date_end] + "-12-31"
      end
    end
  end
end

.full_date_single_to_datetime(string) ⇒ Object

Transform full date strings into parsed datetime objects e.g. “September 9, 1999” -> datetime



847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
 
# File 'lib/timetwister/parser.rb', line 847

def self.full_date_single_to_datetime(string)
  new_string = string.clone
  if new_string.match(/\d{4}\-\d{2}\-\d{2}/)
    parse_string = new_string
  else
    year = new_string.match(/[0-9]{4}/).to_s
    new_string.gsub!(Regexp.new(year), '')
    if new_string.match(/[0-9]{1,2}/)
      day = new_string.match(/[0-9]{1,2}/).to_s
      new_string.gsub!(Regexp.new(day), '')
    else
      day = nil
    end

    new_string.gsub!(/[\.\,\s\-]+/,'')

    month = new_string.clone
    parse_string = month
    parse_string += day ? " #{day}, #{year}" : " #{year}"
  end
  datetime = DateTime.parse(parse_string)
end

.iso8601_datetime(iso_8601_date) ⇒ Object

generates datetime from ISO8601-formatted date



915
916
917
918
919
920
921
922
923
 
# File 'lib/timetwister/parser.rb', line 915

def self.iso8601_datetime(iso_8601_date)
  if iso_8601_date.match(/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}$/)
    DateTime.parse(iso_8601_date)
  elsif iso_8601_date.match(/^[0-9]{4}\-[0-9]{2}$/)
    DateTime.parse(iso_8601_date + '-01')
  else
    DateTime.parse(iso_8601_date + '-01-01')
  end
end

.iso8601_string_format(iso_8601_date) ⇒ Object

detects format of ISO8601 date to pass to strftime



904
905
906
907
908
909
910
911
912
 
# File 'lib/timetwister/parser.rb', line 904

def self.iso8601_string_format(iso_8601_date)
  if iso_8601_date.match(/^[0-9]{4}\-[0-9]{2}\-[0-9]{2}$/)
    return '%Y-%m-%d'
  elsif iso_8601_date.match(/^[0-9]{4}\-[0-9]{2}$/)
    return '%Y-%m'
  else
    return '%Y'
  end
end

.match_replace ⇒ Object 



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
 
# File 'lib/timetwister/parser.rb', line 49

def self.match_replace
  match_replace_clusters.each do |c|
    match_patterns = (c[:match].kind_of? Array) ? c[:match] : [c[:match]]
    match_patterns.each do |p|
      match_test = @regex_tokens[:anchor_start] + p + @regex_tokens[:anchor_end]
      if @string.match(match_test)
        @dates[:test_data] = c[:id]
        if c[:proc]
          # clone string to avoid changing it via in-place methods used in Procs
          work_string = @string.clone

          # using a begin/rescue to catch dates that Date.parse errors on
          begin
            c[:proc].call(work_string, c[:arg])

          # ArgumentError for pre-2.7.0 DateTime errors,
          # Date::Error for 2.7.0 and later
          rescue ArgumentError || Date::Error
            @dates = { :original_string => @string, :index_dates => [], :keydate => nil, :keydate_z => nil, :date_start => nil, :date_end => nil,
                :date_start_full => nil, :date_end_full => nil, :inclusive_range => nil, :certainty => nil }
          end
        end
        break
      end
    end
  end
end

.match_replace_clusters ⇒ Object 



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
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
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
 
# File 'lib/timetwister/parser.rb', line 78

def self.match_replace_clusters
  r = @regex_tokens

  # extend regex_tokens for common complex formats

  # July 4, 1776
  r[:date_month_day_year] = "(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:optional_comma]}#{r[:year]}"
  # July 1776
  r[:date_month_year] = "(#{r[:circa]})?#{r[:named_month]}#{r[:optional_comma]}#{r[:year]}"
  # 1776 July 4
  r[:date_year_month_day] = "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:named_month]}#{r[:day_of_month]}"
  # 1776 4 July
  r[:date_year_day_month] = "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:day_of_month]}#{r[:named_month]}"
  # 4 July 1776
  r[:date_day_month_year] = "(#{r[:circa]})?#{r[:day_of_month]}#{r[:named_month]}#{r[:optional_comma]}#{r[:year]}"
  # 1776 July
  r[:date_year_month] = "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:named_month]}"

  match_replace = []

  # NOTE: :match values will be converted to regular expressions
  #   and anchored at the beginning and end of test string.
  #   Leading and trailing punctuation will be ignored

  # options[:force_8601] == true will force '2001-02' to be treated as February 2001 rather than 2001-2002
  #   and will handle ISO8601 ranges, e.g. 2001-02/2001-12
  if @options[:force_8601]
    match_replace << {
      :match => "#{r[:iso8601_full]}\\/#{r[:iso8601_full]}",
      :proc => proc_8601_range,
      :id => 10
    }
    match_replace << {
      :match => "#{r[:iso8601_month]}",
      :proc => proc_month_year_single,
      :id => 20
    }
  end

  # ISO 8601 (full dates only - see note on options[:force_8601] above)
  match_replace << {
    :match => "#{r[:iso8601]}",
    :proc => proc_full_date_single,
    :id => 30
  }

  # ISO 8601 ranges (full dates only - see note on options[:force_8601] above)
  match_replace << {
    :match => "#{r[:iso8601]}\\/#{r[:iso8601]}",
    :proc => proc_8601_range,
    :id => 40
  }

  # matches any number of 4-digit years separated by a single range or list delimiter
  match_replace << {
    :match => "((#{r[:year]})|(#{r[:year_range_short]}))(#{r[:range_or_list_delimiter]}((#{r[:year]})|(#{r[:year_range_short]})))+",
    :proc => proc_year_range_list_combo,
    :id => 60
  }

  # 1969, [1969], c1969
  # anti-matches the range delimiter as to not override id 150/160
  match_replace << {
    :match => [
              "(#{r[:circa]})?[^#{r[:range_delimiter]}]#{r[:year]}([\\,\\;\\s(and)]{1,3}#{r[:nd]})?",
              "^#{r[:year]}$"],
    :proc => proc_single_year,
    :id => 70
  }

  # "July 4 1976 - Oct 1 1981"
  # "4 July 1976 - 1 Oct 1981"
  # "1976 July 4 - 1981 Oct 1"
  # "1976 4 July - 1981 1 Oct"
  match_replace << {
    :match => [
      "#{r[:date_month_day_year]}#{r[:range_delimiter]}#{r[:date_month_day_year]}",
      "#{r[:date_day_month_year]}#{r[:range_delimiter]}#{r[:date_day_month_year]}",
      "#{r[:date_year_month_day]}#{r[:range_delimiter]}#{r[:date_year_month_day]}",
      "#{r[:date_year_day_month]}#{r[:range_delimiter]}#{r[:date_year_day_month]}",
    ],
    :proc => proc_full_date_single_range,
    :id => 80
  }

  # "1976 July - 1981 Oct"
  # "July 1976 - Oct 1981"
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:date_year_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:date_year_month]}",
      "(#{r[:circa]})?#{r[:date_month_year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:date_month_year]}"
    ],
    :proc => proc_full_date_single_range,
    :arg => 'month',
    :id => 100
  }



  # 1969-1977
  match_replace << {
    :match => "(#{r[:circa]})?#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}",
    :proc => proc_year_range,
    :id => 120
  }

  # 1960-1980s
  match_replace << {
    :match => "(#{r[:circa]})?#{r[:year]}#{r[:range_delimiter]}#{r[:decade_s]}",
    :proc => proc_range_year_to_decade,
    :id => 130
  }

  # 1960s-1981
  match_replace << {
    :match => "(#{r[:circa]})?\\s?#{r[:decade_s]}#{r[:range_delimiter]}(#{r[:circa]})?\\s?#{r[:year]}",
    :proc => proc_year_range,
    :id => 140
  }

  # 1969-72
  match_replace << {
    :match => "(#{r[:circa]})?#{r[:year_range_short]}",
    :proc => proc_year_range_short,
    :id => 145
  }

  # 1969- (e.g. after 1969)
  match_replace << {
    :match => "(#{r[:circa]})?\\s?#{r[:year]}#{r[:range_delimiter]}",
    :proc => proc_single_year,
    :arg => 'start',
    :id => 150
  }

  # -1969 (e.g. before 1969) - treat as single
  match_replace << {
    :match => "#{r[:range_delimiter]}(#{r[:circa]})?\\s?#{r[:year]}",
    :proc => proc_single_year,
    :arg => 'end',
    :id => 160
  }

  # nd, n.d., undated, Undated...
  # note that :id never manifests anywhere (no hash to put it into)
  # so the :test_data for undated is nil
  match_replace << {
    :match => "#{r[:nd]}",
    :proc => nil,
    :id => 170
  }

  # 1970's, 1970s
  match_replace << {
    :match => "(#{r[:circa]})?#{r[:decade_s]}",
    :proc => proc_decade_s,
    :id => 180
  }

  # 1970s - 1980s, etc.
  match_replace << {
    :match => "(#{r[:circa]})?\\s?#{r[:decade_s]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:decade_s]}",
    :proc => proc_decade_s_range,
    :id => 190
  }

  # July 4 1976
  # 4 July 1976
  # 1976 July 4
  # 1976 4 July
  # (with or without optional commas)
  match_replace << {
    :match => [
      "#{r[:date_month_day_year]}",
      "#{r[:date_day_month_year]}",
      "#{r[:date_year_month_day]}",
      "#{r[:date_year_day_month]}"
    ],
    :proc => proc_full_date_single,
    :id => 200
  }


  # December 1941
  # 1941 December
  # (with or without optional commas)
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:date_month_year]}",
      "(#{r[:circa]})?#{r[:date_year_month]}"
    ],
    :proc => proc_month_year_single,
    :id => 220
  }


  # Jun-July 1969
  # 1969 Jun-July
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:named_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:optional_comma]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:named_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}",
    ],
    :proc => proc_single_year_month_range,
    :id => 230
  }


  # Feb. 1-20, 1980
  # 1980 Feb. 1-20
  # 1980 1-20 Feb.
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}#{r[:day_of_month]}#{r[:optional_comma]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}#{r[:day_of_month]}",
      "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:day_of_month]}#{r[:range_delimiter]}#{r[:day_of_month]}#{r[:named_month]}",
      "(#{r[:circa]})?#{r[:day_of_month]}#{r[:range_delimiter]}#{r[:day_of_month]}#{r[:named_month]}#{r[:optional_comma]}#{r[:year]}"
    ],
    :proc => proc_single_month_date_range,
    :id => 240
  }


  # Early 1960's, mid-1980s, late 1950's, etc.
  match_replace << {
    :match => "(#{r[:circa]})?#{r[:decade_qualifier]}\\s?#{r[:decade_s]}",
    :proc => proc_decade_s_qualified,
    :id => 250
  }


  # 19--, 18--, 18--?, etc.
  match_replace << {
    :match => "(#{r[:circa]})?[1-2][0-9]\-{2}",
    :proc => proc_century_with_placeholders,
    :id => 290
  }

  # Jan 2-Dec 31 1865
  # 1865 Jan 2-Dec 31
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:optional_comma]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:year]}#{r[:optional_comma]}#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}",
      "(#{r[:circa]})?#{r[:day_of_month]}#{r[:named_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:day_of_month]}#{r[:named_month]}#{r[:optional_comma]}#{r[:year]}"
      ],
    :proc => proc_year_with_dates,
    :id => 310
  }

  # 1863 Aug 7-1866 Dec
  match_replace << {
    :match => [
      "(#{r[:circa]})?#{r[:year]}#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}#{r[:named_month]}",
      "(#{r[:circa]})?#{r[:day_of_month]}#{r[:named_month]}#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:named_month]}#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:day_of_month]}#{r[:optional_comma]}#{r[:year]}",
      "(#{r[:circa]})?#{r[:year]}#{r[:named_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}#{r[:named_month]}#{r[:day_of_month]}"
      ],
    :proc => proc_full_with_year_month,
    :id => 330
  }

  # 1942 November-1943
  # 1943-1944 November
  # November 1942-1943
  # 1942-November 1943
  match_replace << {
    :match => [
     "(#{r[:circa]})?#{r[:year]}#{r[:named_month]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}",
     "(#{r[:circa]})?#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}#{r[:named_month]}",
     "(#{r[:circa]})?#{r[:named_month]}#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:year]}",
     "(#{r[:circa]})?#{r[:year]}#{r[:range_delimiter]}(#{r[:circa]})?#{r[:named_month]}#{r[:year]}"
      ],
      :proc => proc_year_range_single_date,
      :id => 340
  }

  # 01/31/1999
  match_replace << {
    :match => "(#{r[:circa]})?[0-1]?[0-9]/[0-3]?[0-9]/#{r[:year]}",
    :proc => proc_date_with_slashes,
    :id => 350
  }

  # 19th century
  match_replace << {
    :match => "(#{r[:decade_qualifier]})?\s?[0-2]?[0-9]\s[Cc][Ee][Nn][Tt][Uu][Rr][Yy]",
    :proc => proc_century_with_qualifiers,
    :id => 360
  }

  match_replace
end

.proc_8601_range ⇒ Object 



662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
 
# File 'lib/timetwister/parser.rb', line 662

def self.proc_8601_range
  proc = Proc.new do |string|
    dates = string.split('/')
    dates.each { |d| d.strip! }

    datetime_start = iso8601_datetime(dates[0])
    datetime_end = iso8601_datetime(dates[1])

    if datetime_start && datetime_end
      year_start = datetime_start.strftime('%Y').to_i
      year_end = datetime_end.strftime('%Y').to_i

      if Utilities.datetime_comparitor(datetime_end) < Utilities.datetime_comparitor(datetime_start)
        # this range is reversed in error
        years = [year_end,year_start]
        year_start, year_end = years[0], years[1]
        datetimes = [datetime_end,datetime_start]
        datetime_start, datetime_end = datetimes[0], datetimes[1]
      end

      @dates[:index_dates] += (year_start..year_end).to_a
      @dates[:date_start] = datetime_start.strftime(iso8601_string_format dates[0])
      @dates[:date_end] = datetime_end.strftime(iso8601_string_format dates[1])
      @dates[:inclusive_range] = true

    end
  end
end

.proc_century_with_placeholders ⇒ Object

19–



493
494
495
496
497
498
499
500
501
502
503
 
# File 'lib/timetwister/parser.rb', line 493

def self.proc_century_with_placeholders
  proc = Proc.new do |string|
    century = string.match(/[0-9]{2}/).to_s
    century += '00'
    century_start = century.to_i
    century_end = (century_start + 99)
    @dates[:index_dates] = (century_start..century_end).to_a
    @dates[:inclusive_range] = true
    process_year_range()
  end
end

.proc_century_with_qualifiers ⇒ Object

mid 19th century



506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
 
# File 'lib/timetwister/parser.rb', line 506

def self.proc_century_with_qualifiers
  proc = Proc.new do |string|
    century = string.match(/[0-9]{2}/).to_s

    if string.match(/[Ee]arly/)
      range_start = '00'
      range_end = '40'
    elsif string.match(/[Mm]id(dle)?/)
      range_start = '30'
      range_end = '80'
    elsif string.match(/[Ll]ate/)
      range_start = '70'
      range_end = '00'
    else
      range_start = '00'
      range_end = '99'
    end

    century_start = (century + range_start).to_i - 100
    century_end = (century + range_end).to_i - 100

    @dates[:index_dates] = (century_start..century_end).to_a
    @dates[:inclusive_range] = true
    process_year_range()
  end
end

.proc_date_with_slashes ⇒ Object

we assume that all matching dates are mm/dd/yyyy if they’re dd/mm/yyyy, this may get jumbled, but that’s rare enough to be okay



828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
 
# File 'lib/timetwister/parser.rb', line 828

def self.proc_date_with_slashes
  proc = Proc.new do |string|
    dates = string.split('/')
    dates.collect! do |d|
      d.strip!
      if d.length == 1
        # convert to ISO style numbers
        d = "0" + d.to_s
      else
        # i am not proud of this
        d = d
      end
    end
    proc_full_date_single.call(dates[2].to_s + "-" + dates[0].to_s + "-" + dates[1].to_s)
  end
end

.proc_decade_s ⇒ Object

1990s



481
482
483
484
485
486
487
488
489
490
 
# File 'lib/timetwister/parser.rb', line 481

def self.proc_decade_s
  proc = Proc.new do |string|
    decade = string.match(/[0-9]{3}0/).to_s
    decade_start = decade.to_i
    decade_end = (decade_start + 9)
    @dates[:index_dates] = (decade_start..decade_end).to_a
    @dates[:inclusive_range] = true
    process_year_range()
  end
end

.proc_decade_s_qualified ⇒ Object

early 1990s



534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
 
# File 'lib/timetwister/parser.rb', line 534

def self.proc_decade_s_qualified
  proc = Proc.new do |string|
    decade = string.match(/[0-9]{3}0/).to_s
    decade_start = decade.to_i
    if string.match(/[Ee]arly/)
      range_start = decade_start
      range_end = decade_start + 5
    elsif string.match(/[Mm]id(dle)?/)
      range_start = decade_start + 3
      range_end = range_start + 5
    elsif string.match(/[Ll]ate/)
      range_start = decade_start + 5
      range_end = decade_start + 9
    end
    @dates[:index_dates] = (range_start..range_end).to_a
    @dates[:inclusive_range] = true
    process_year_range()
  end
end

.proc_decade_s_range ⇒ Object

1990s-2000s



555
556
557
558
559
560
561
562
563
564
565
566
 
# File 'lib/timetwister/parser.rb', line 555

def self.proc_decade_s_range
  proc = Proc.new do |string|
    decades = string.scan(/[0-9]{3}0/)
    if decades.length == 2
      range_start = decades[0].to_i
      range_end = decades[1].to_i + 9
      @dates[:index_dates] = (range_start..range_end).to_a
      @dates[:inclusive_range] = true
      process_year_range()
    end
  end
end

.proc_full_date_single ⇒ Object

1999-09-09 September 9, 1999 1999 September 9



571
572
573
574
575
576
577
578
579
 
# File 'lib/timetwister/parser.rb', line 571

def self.proc_full_date_single
  proc = Proc.new do |string|
    datetime = full_date_single_to_datetime(string)
    if datetime
      @dates[:date_start] = datetime.strftime('%Y-%m-%d')
      @dates[:index_dates] << datetime.strftime('%Y').to_i
    end
  end
end

.proc_full_date_single_range ⇒ Object

“1976 July 4 - 1981 October 1”, etc. call with second argument ‘month’ if no day value is present



597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
 
# File 'lib/timetwister/parser.rb', line 597

def self.proc_full_date_single_range
  proc = Proc.new do |string, specificity|
    dates = []
    full_date_format = (specificity == 'month') ? '%Y-%m' : '%Y-%m-%d'
    if string.match(/\-/)
      dates = string.split('-')
    elsif string.match(/\sto\s/)
      dates = string.split(' to ')
    end

    dates.each { |d| d.strip! }

    if dates.length == 2
      datetime_start = full_date_single_to_datetime(dates[0])
      datetime_end = full_date_single_to_datetime(dates[1])

      # if month-specific, modify datetimes to include all days of each month
      if specificity == 'month'
        month_date_start = datetime_start.strftime('%Y-%m')
        datetime_start = DateTime.parse(month_date_start + '-01')
        month_date_end = datetime_end.strftime('%Y-%m')
        month_date_end_parts = month_date_end.split('-')

        month_date_end_last = Utilities.days_in_month(month_date_end_parts[1],month_date_end_parts[0]).to_s
        month_date_full = month_date_end + "-#{month_date_end_last}"

        datetime_end = DateTime.parse(month_date_full)
      end

      if datetime_start && datetime_end
        process_date_range(datetime_start,datetime_end,specificity)
      end
      @dates[:inclusive_range] = true
    end
  end
end

.proc_full_with_year_month ⇒ Object

1863 Aug 7-1866 Dec



785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
 
# File 'lib/timetwister/parser.rb', line 785

def self.proc_full_with_year_month
  proc = Proc.new do |string|
    dates = []
    if string.match(/\-/)
      dates = string.split('-')
    elsif string.match(/\sto\s/)
      dates = string.split(' to ')
    end

    dates.each { |d| d.strip! }

    if dates.length == 2

      datetime_end = full_date_single_to_datetime(dates[1])

      if !dates[0].match(/[0-9]\D+[0-9]/).nil?
        datetime_start = full_date_single_to_datetime(dates[0])
        month_date_start = datetime_start.strftime('%Y-%m-%d')
        month_date_end = datetime_end.strftime('%Y-%m')
        month_date_end_parts = month_date_end.split('-')

        month_date_end_last = Utilities.days_in_month(month_date_end_parts[1],month_date_end_parts[0]).to_s
        month_date_full = month_date_end + "-#{month_date_end_last}"

        datetime_end = DateTime.parse(month_date_full)
      else
        datetime_start = full_date_single_to_datetime(dates[0] + "-01")
        if datetime_start && datetime_end
          month_date_start = datetime_start.strftime('%Y-%m')
          month_date_end = datetime_end.strftime('%Y-%m-%d')
        end
      end

      if datetime_start && datetime_end
        process_date_range(datetime_start,datetime_end)
      end
      @dates[:inclusive_range] = true
    end
  end
end

.proc_month_year_single ⇒ Object

September 1999 1999 September



583
584
585
586
587
588
589
590
591
592
593
 
# File 'lib/timetwister/parser.rb', line 583

def self.proc_month_year_single
  proc = Proc.new do |string|
    string.gsub!(/\?/,'')

    datetime = DateTime.parse(string)
    if datetime
      @dates[:date_start] = datetime.strftime('%Y-%m')
      @dates[:index_dates] << datetime.strftime('%Y').to_i
    end
  end
end

.proc_range_year_to_decade ⇒ Object

1999 - 2010s



410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
 
# File 'lib/timetwister/parser.rb', line 410

def self.proc_range_year_to_decade
  proc = Proc.new do |string|
      range = year_range(string)
      range_start, range_end_decade = range

    if range_start && range_end_decade
      if range_end_decade > range_start
        range_end = range_end_decade + 9
        (range_start..range_end).to_a.each { |d| @dates[:index_dates] << d }
        @dates[:inclusive_range] = true
        process_year_range()
      end
    end
  end
end

.proc_single_month_date_range ⇒ Object

Feb. 1-20, 1980 1980 Feb. 1-20 1980 1-20 Feb.



638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
 
# File 'lib/timetwister/parser.rb', line 638

def self.proc_single_month_date_range
  proc = Proc.new do |string|
    year = Utilities.extract_year(string)
    day_range = string.match(/\d{1,2}\-\d{1,2}/).to_s
    string.gsub!(Regexp.new(day_range),'')
    month = string.strip
    days = day_range.split('-')
    dates = []
    if days.length == 2
      days.each do |d|
        d.strip!
        dates << "#{month} #{d} #{year}"
      end
      datetime_start = full_date_single_to_datetime(dates[0])
      datetime_end = full_date_single_to_datetime(dates[1])
      if datetime_start && datetime_end
        process_date_range(datetime_start,datetime_end)
      end
    end
    @dates[:inclusive_range] = true
  end
end

.proc_single_year ⇒ Object 



374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
 
# File 'lib/timetwister/parser.rb', line 374

def self.proc_single_year
  proc = Proc.new do |string, open_range|
    year = string.gsub(/[^0-9]*/,'')
    @dates[:index_dates] << year.to_i
    case open_range
    when 'start'
      @dates[:date_start] = year
    when 'end'
      @dates[:date_end] = year
    else
      @dates[:date_start] = year
      @dates[:date_end] = year
    end
  end
end

.proc_single_year_month_range ⇒ Object

“1981 Oct-Dec”, “Oct-Dec 1981”, etc.



693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
 
# File 'lib/timetwister/parser.rb', line 693

def self.proc_single_year_month_range
  proc = Proc.new do |string|
    year = string.match(/[0-9]{4}/).to_s
    string.gsub!(year,'')
    string.strip!
    first_month = string.match(@regex_tokens[:named_month]).to_s
    last_month = string.match(@regex_tokens[:named_month] + '$').to_s

    date_string_first = first_month + ' 1,' + year
    datetime_first = DateTime.parse(date_string_first)
    if !last_month.empty?
      @dates[:date_start] = datetime_first.strftime('%Y-%m')
      date_string_last = last_month + ' ' + year
      datetime_last = DateTime.parse(date_string_last)
      @dates[:date_end] = datetime_last.strftime('%Y-%m')
    end
    @dates[:inclusive_range] = true
    @dates[:index_dates] << year.to_i
  end
end

.proc_year_range ⇒ Object

1999



392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
 
# File 'lib/timetwister/parser.rb', line 392

def self.proc_year_range
  proc = Proc.new do |string|
    # Only supports years from 1000
    range = year_range(string)
    if range.length > 0
      range_start, range_end = range
      if range_end > range_start

        (range_start..range_end).to_a.each { |d| @dates[:index_dates] << d }

        @dates[:inclusive_range] = true
        process_year_range()
      end
    end
  end
end

.proc_year_range_list_combo ⇒ Object

this may be obsolete - however, keep it just in case



446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
 
# File 'lib/timetwister/parser.rb', line 446

def self.proc_year_range_list_combo
  proc = Proc.new do |string|
    ranges = []
    list = []
    index_dates = []
    years = string.scan(/[0-2][0-9]{3}/)
    delimiters = string.scan(/\s?[\-\;\,]\s?/)
    delimiters.each { |d| d.strip! }
    i = 0
    while i < years.length
      y1 = years[i]
      d = delimiters[i]
      if d == '-'
        y2 = years[i + 1]
        ranges << [y1,y2]
        i += 2
      else
        list << y1
        i += 1
      end
    end
    ranges.each do |r|
      range_start = r[0].to_i
      range_end = r[1].to_i
      (range_start..range_end).to_a.each { |d| index_dates << d }
    end
    list.each { |y| index_dates << y.to_i }
    index_dates.sort!
    @dates[:index_dates] = index_dates
    @dates[:inclusive_range] = false
    process_year_range()
  end
end

.proc_year_range_short ⇒ Object

1990-91



428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
 
# File 'lib/timetwister/parser.rb', line 428

def self.proc_year_range_short
  proc = Proc.new do |string|
    range = string.split('-')
    range.each { |d| d.gsub!(/[^0-9]*/,'') }
    decade_string = range[0].match(/^[0-9]{2}/).to_s
    range[1] = decade_string + range[1]
    range_start = range[0].to_i
    range_end = range[1].to_i

    if range_end > range_start
      (range_start..range_end).to_a.each { |d| @dates[:index_dates] << d }
      @dates[:inclusive_range] = true
      process_year_range()
    end
  end
end

.proc_year_range_single_date ⇒ Object

1942 November-1943 1943-1944 November November 1942-1943 1942-November 1943



719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
 
# File 'lib/timetwister/parser.rb', line 719

def self.proc_year_range_single_date
  proc = Proc.new do |string|
    dates = []
    if string.match(/\-/)
      dates = string.split('-')
    elsif string.match(/\sto\s/)
      dates = string.split(' to ')
    end

    dates.each { |d| d.strip! }
    if dates.length == 2
      if dates[0].match(/[A-Za-z]/)
        datetime_start = full_date_single_to_datetime(dates[0] + "-01")
        datetime_end = full_date_single_to_datetime(dates[1] + "-12-31")
      else
        datetime_start = full_date_single_to_datetime(dates[0] + "-01-01")
        datetime_end_tmp = full_date_single_to_datetime(dates[1] + "-28")
        datetime_end = full_date_single_to_datetime(dates[1] + "-" + Utilities.days_in_month(datetime_end_tmp.month, datetime_end_tmp.year).to_s)
      end

      if datetime_start && datetime_end
        process_date_range(datetime_start,datetime_end,"month")
      end
      @dates[:inclusive_range] = true

    end
  end
end

.proc_year_with_dates ⇒ Object

Jan 2-Dec 31 1865 1865 Jan 2-Dec 31



750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
 
# File 'lib/timetwister/parser.rb', line 750

def self.proc_year_with_dates
  proc = Proc.new do |string|
    # extract year for later
    year = string.match(/[0-9]{4}/).to_s

    # instead of dealing with punctuation, we'll scorch the earth
    string.gsub!(/[\,\?]/,'')

    # split the string into two different dates
    if string.match(/\-/)
      dates = string.split('-')
    elsif string.match(/\sto\s/)
      dates = string.split(' to ')
    end

    # if everything's as expected, append the year to the shorter date
    if dates.length == 2
      dates.each { |d|
        if d.match(year).nil?
          d << " "
          d << year
        end
      }

      # change our strings to datetime objects
      # and send them to be processed elsewhere
      datetime_start = DateTime.parse(dates[0])
      datetime_end = DateTime.parse(dates[1])
      process_date_range(datetime_start, datetime_end)
      @dates[:inclusive_range] = true
    end
  end
end

.process_date_range(datetime_start, datetime_end, specificity = nil) ⇒ Object 



871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
 
# File 'lib/timetwister/parser.rb', line 871

def self.process_date_range(datetime_start,datetime_end,specificity=nil)

  if !datetime_start || !datetime_end
    return
  end

  date_format = (specificity == 'month') ? '%Y-%m' : '%Y-%m-%d'

  year_start = datetime_start.strftime('%Y').to_i
  year_end = datetime_end.strftime('%Y').to_i

  if Utilities.datetime_comparitor(datetime_end) > Utilities.datetime_comparitor(datetime_start)

    @dates[:index_dates] += (year_start..year_end).to_a

    @dates[:date_start] = datetime_start.strftime(date_format)
    @dates[:date_end] = datetime_end.strftime(date_format)

    @dates[:date_start_full] = datetime_start.strftime('%Y-%m-%d')
    @dates[:date_end_full] = datetime_end.strftime('%Y-%m-%d')
  end
end

.process_year_range ⇒ Object

generates date_start and date_end from index_dates list



895
896
897
898
899
900
 
# File 'lib/timetwister/parser.rb', line 895

def self.process_year_range
  @dates[:index_dates].sort!
  @dates[:index_dates].uniq!
  @dates[:date_start] = @dates[:index_dates].first
  @dates[:date_end] = @dates[:index_dates].last
end

.string_to_dates(str, options) ⇒ Object 



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
 
# File 'lib/timetwister/parser.rb', line 8

def self.string_to_dates(str, options)
  @string = str.clone
  @options = options

  @dates = { :original_string => str, :index_dates => [], :date_start => nil, :date_end => nil,
    :date_start_full => nil, :date_end_full => nil, :inclusive_range => nil, :certainty => nil }

  @regex_tokens = Utilities.regex_tokens

  # defensive checks against very malformed date strings
  if str.include?('??')
    return @dates
  end

  # perform this here, before the string gets purged of certainty indicators
  @dates[:certainty] = Utilities.return_certainty(@string)

  # normalize the string into the parser's preferred form
  @string = Utilities.clean_string(@string)
  @string = Utilities.language_to_english(@string)
  @string = Utilities.replace_ordinals(@string)

  # parse!
  self.match_replace

  # if there are any future dates, return an empty hash
  if @dates[:index_dates] != [] && @dates[:index_dates].last > Time.now.year
    return { :original_string => @string, :index_dates => [], :keydate => nil, :keydate_z => nil, :date_start => nil, :date_end => nil,
      :date_start_full => nil, :date_end_full => nil, :inclusive_range => nil, :certainty => nil }
  end

  if @dates[:date_start] && !@dates[:date_end] && !(@dates[:test_data] == 150 || @dates[:test_data] == 160)
    @dates[:date_end] = @dates[:date_start]
  end

  @dates = Utilities.stringify_values(@dates)
  add_full_dates

  return @dates
end

.year_range(string) ⇒ Object 



925
926
927
928
929
 
# File 'lib/timetwister/parser.rb', line 925

def self.year_range(string)
  range = string.scan(Regexp.new(@regex_tokens[:year]))
  range.each { |d| d.gsub!(/[^0-9]*/,'') }
  range.map { |y| y.to_i }
end