Class: Emendate::DateSegmenter

Inherits:
Object
  • Object
show all
Includes:
DateUtils
Defined in:
lib/emendate/date_segmenter.rb

Constant Summary collapse

SEPTYPES =

Segment types to be treated as date separators after initial date segmentation and application of modifiers

%i[and or comma pipe]

Class Method Summary collapse

Instance Method Summary collapse

Methods included from DateUtils

#expand_shorter_digits, #is_range?, #max_season, #min_season, #month_abbr_literal, #month_literal, #possible_range?, #valid_date?, #valid_day?, #valid_month?, #valid_month_or_season?, #valid_season?, #valid_year?

Constructor Details

#initialize(tokens) ⇒ DateSegmenter

Returns a new instance of DateSegmenter.



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# File 'lib/emendate/date_segmenter.rb', line 18

def initialize(tokens)
  @origtokens = tokens
  @working = tokens.class.new.copy(tokens)
  @result = tokens.class.new.copy(tokens)
  result.clear
end

Class Method Details

.call ⇒ Object 



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# File 'lib/emendate/date_segmenter.rb', line 9

def call(...)
  new(...).call
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/emendate/date_segmenter.rb', line 25

def call
  recursive_parse until working.empty?

  %i[partial before after era_bce].each do |mod|
    working.copy(result)
    result.clear
    apply_modifiers(mod) until working.empty?
  end

  separators = result.select { |seg| SEPTYPES.include?(seg.type) }
  return Success(result) if separators.empty?

  if separators.map(&:type).uniq.length > 1
    return Failure(Emendate::SegmentSet.new(segments: [
      Emendate::DateTypes::Error.new(
        sources: result, error_type: :unprocessable,
        message: "Multiple date separator types"
      )
    ]))
  else
    transform_separators(separators)
  end
rescue Emendate::InvalidDateError => e
  Failure(Emendate::SegmentSet.new(segments: [
    Emendate::DateTypes::Error.new(
      sources: result, error_type: :invalid, exception: e
    )
  ]))
rescue Emendate::ForbiddenSegmentAdditionError => e
  result << Emendate::DateTypes::Error.new(
    sources: origtokens, error_type: :unprocessable, exception: e
  )
  Failure(result)
else
  Success(result)
end