Module: Pericope::Parsing

Included in:
Pericope
Defined in:
lib/pericope/parsing.rb

Defined Under Namespace

Classes: ReferenceFragment

Instance Method Summary collapse

Instance Method Details

#coerce_to_range(number, range) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 165

def coerce_to_range(number, range)
  return range.begin if number < range.begin
  return range.end if number > range.end
  number
end

#match_all(text) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 64

def match_all(text)
  text.scan(Pericope.regexp) do
    match = Regexp.last_match
    book = BOOK_IDS[match.captures.find_index(&:itself)]

    ranges = parse_reference(book, match[67])
    next if ranges.empty?

    attributes = {
      :original_string => match.to_s,
      :book => book,
      :ranges => ranges
    }

    yield attributes, match
  end
end

#match_one(text) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 57

def match_one(text)
  match_all(text) do |attributes|
    return attributes
  end
  nil
end

#normalize_reference(reference) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 86

def normalize_reference(reference)
  normalizations.reduce(reference.to_s) { |reference, (regex, replacement)| reference.gsub(regex, replacement) }
end

#parse(text) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 16

def parse(text)
  pericopes = []
  match_all(text) do |attributes|
    pericope = Pericope.new(attributes)
    if block_given?
      yield pericope
    else
      pericopes << pericope
    end
  end
  block_given? ? text : pericopes
end

#parse_one(text) ⇒ Object

Differs from Pericope.new in that it won’t raise an exception if text does not contain a pericope but will return nil instead.



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# File 'lib/pericope/parsing.rb', line 9

def parse_one(text)
  parse(text) do |pericope|
    return pericope
  end
  nil
end

#parse_ranges(book, ranges) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 90

def parse_ranges(book, ranges)
  default_chapter = nil
  default_chapter = 1 unless book_has_chapters?(book)
  default_verse = nil

  ranges.map do |range|
    range_begin_string, range_end_string = range.split("-")

    # treat 12:4 as 12:4-12:4
    range_end_string ||= range_begin_string

    range_begin = parse_reference_fragment(range_begin_string, default_chapter: default_chapter, default_verse: default_verse)

    # no verse specified; this is a range of chapters, start with verse 1
    chapter_range = false
    if range_begin.needs_verse?
      range_begin.verse = 1
      chapter_range = true
    end

    range_begin.chapter = to_valid_chapter(book, range_begin.chapter)
    range_begin.verse = to_valid_verse(book, range_begin.chapter, range_begin.verse)

    if range_begin_string == range_end_string && !chapter_range
      range_end = range_begin.dup
    else
      range_end = parse_reference_fragment(range_end_string, default_chapter: (range_begin.chapter unless chapter_range))
      range_end.chapter = to_valid_chapter(book, range_end.chapter)

      # treat Mark 3-1 as Mark 3-3 and, eventually, Mark 3:1-35
      range_end.chapter = range_begin.chapter if range_end.chapter < range_begin.chapter

      # this is a range of chapters, end with the last verse
      if range_end.needs_verse?
        range_end.verse = get_max_verse(book, range_end.chapter)
      else
        range_end.verse = to_valid_verse(book, range_end.chapter, range_end.verse)
      end
    end

    # e.g. parsing 11 in 12:1-8,11 => remember that 12 is the chapter
    default_chapter = range_end.chapter

    # e.g. parsing c in 9:12a, c => remember that 12 is the verse
    default_verse = range_end.verse

    range = Range.new(range_begin.to_verse(book: book), range_end.to_verse(book: book))

    # an 'a' at the beginning of a range is redundant
    range.begin.letter = nil if range.begin.letter == "a" && range.end.to_i > range.begin.to_i

    # a 'c' at the end of a range is redundant
    range.end.letter = nil if range.end.letter == max_letter && range.end.to_i > range.begin.to_i

    range
  end
end

#parse_reference(book, reference) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 82

def parse_reference(book, reference)
  parse_ranges(book, normalize_reference(reference).split(/[,;]/))
end

#parse_reference_fragment(input, default_chapter: nil, default_verse: nil) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 148

def parse_reference_fragment(input, default_chapter: nil, default_verse: nil)
  chapter, verse, letter = input.match(Pericope.fragment_regexp).captures
  chapter = default_chapter unless chapter
  chapter, verse = [verse, nil] unless chapter
  verse = default_verse unless verse
  letter = nil unless verse
  ReferenceFragment.new(chapter.to_i, verse&.to_i, letter)
end

#split(text) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 29

def split(text)
  segments = []
  start = 0

  match_all(text) do |attributes, match|

    pretext = text.slice(start...match.begin(0))
    if pretext.length > 0
      segments << pretext
      yield pretext if block_given?
    end

    pericope = Pericope.new(attributes)
    segments << pericope
    yield pericope if block_given?

    start = match.end(0)
  end

  pretext = text.slice(start...text.length)
  if pretext.length > 0
    segments << pretext
    yield pretext if block_given?
  end

  segments
end

#to_valid_chapter(book, chapter) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 157

def to_valid_chapter(book, chapter)
  coerce_to_range(chapter, 1..get_max_chapter(book))
end

#to_valid_verse(book, chapter, verse) ⇒ Object 



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# File 'lib/pericope/parsing.rb', line 161

def to_valid_verse(book, chapter, verse)
  coerce_to_range(verse, 1..get_max_verse(book, chapter))
end