Class: Scripref::Parser

Inherits:
StringScanner
  • Object
show all
Includes:
BasicMethods
Defined in:
lib/scripref/parser.rb

Constant Summary

Constants included from BasicMethods

BasicMethods::NUMBER_RE

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from BasicMethods

#book_re, #chapter_re, #verse_re

Constructor Details

#initialize(*mods) ⇒ Parser 



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# File 'lib/scripref/parser.rb', line 14

def initialize *mods
  @mods = mods
  mods.each {|m| extend m}
end

Instance Attribute Details

#error ⇒ Object (readonly)

Returns the value of attribute error.



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# File 'lib/scripref/parser.rb', line 9

def error
  @error
end

Instance Method Details

#abbrev2book(str) ⇒ Object 



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# File 'lib/scripref/parser.rb', line 246

def abbrev2book str
  s = str.strip
  s.sub! /\.$/, ''
  @books_str ||= ('#' << book_names.map(&:names).flatten.join('#') << '#')
  pattern = s.chars.map {|c| Regexp.escape(c) << '[^#]*'}.join
  re = /(?<=#)#{pattern}(?=#)/
  names = @books_str.scan(re)
  uniq_numbers = names.map {|n| str2book_num(n)}.uniq
  if uniq_numbers.size != 1
    unscan
    give_up format("Abbreviation %s is ambiguous it matches %s!", s, names.join(', '))
  end
  names.first
end

#abbrev2num(str) ⇒ Object 



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# File 'lib/scripref/parser.rb', line 240

def abbrev2num str
  s = str.strip
  s.sub! /\.$/, ''
  str2book_num(s) or str2book_num(abbrev2book(s))
end

#b1 ⇒ Object

try to parse first book



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# File 'lib/scripref/parser.rb', line 35

def b1
  s = scan(book_re) or return nil
  @text << s
  @b1 = @b2 = abbrev2num(s)
  @c1 = @v1 = @c2 = @v2 = nil

  if pass_sep
    b1 or give_up 'EOS or book expected!'
  elsif check(Regexp.new(chapter_re.source + cv_sep_re.source))
    @c1 = @v1 = nil
    @c2 = @v2 = nil
    c1
  else
    if book_has_only_one_chapter?(@b1)
      @c1 = @c2 = 1
      epsilon or (hyphen and b2) or v1 or give_up 'EOS or hyphen and book or verse expected!'
    else
      @c1 = @v1 = nil
      @c2 = @v2 = nil
      epsilon or (hyphen and b2) or c1 or give_up 'EOS or hyphen and book or chapter expected!'
    end
  end
end

#b2 ⇒ Object

try to parse second book



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# File 'lib/scripref/parser.rb', line 108

def b2
  s = scan(book_re) or return nil
  @text << s
  @b2 = abbrev2num(s)
  @c2 = @v2 = nil

  if pass_sep
    b1 or give_up 'EOS or book expected!'
  elsif check(Regexp.new(chapter_re.source + cv_sep_re.source))
    c2
  else
    if book_has_only_one_chapter?(@b2)
      @c2 = 1
      epsilon or v2 or give_up 'EOS or chapter or verse expected!'
    else
      epsilon or c2 or give_up 'EOS or chapter expected!'
    end
  end
end

#c1 ⇒ Object

try parse first chapter



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# File 'lib/scripref/parser.rb', line 60

def c1
  s = scan(chapter_re) or return nil
  @text << s
  @c1 = @c2 = s.to_i
  @v1 = @v2 = nil

  if cv_sep
    v1 or give_up 'Verse expected!'
  elsif hyphen
    b2 or c2 or give_up 'Book or chapter expected!'
  elsif pass_sep
    b1 or c1 or give_up 'Book or chapter expected!'
  else
    epsilon or give_up 'EOS or chapter verse separator or hyphen and book or hyphen and chapter or passage separator and book or passage separator and chapter expected!'
  end
end

#c2 ⇒ Object

try to parse second chapter



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# File 'lib/scripref/parser.rb', line 129

def c2
  s = scan(chapter_re) or return nil
  @text << s
  @c2 = s.to_i

  if cv_sep
    v2 or give_up 'Verse expected!'
  elsif pass_sep
    b1 or c1 or give_up 'Book or chapter expected!'
  else
    epsilon or give_up 'EOS or chapter verse separator expected!'
  end
end

#cv_sep ⇒ Object

try to parse separator or chapter and verse



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# File 'lib/scripref/parser.rb', line 172

def cv_sep
  if s = scan(cv_sep_re)
    @text << s
    s
  else
    nil
  end
end

#epsilon ⇒ Object

try to parse end of string



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# File 'lib/scripref/parser.rb', line 163

def epsilon
  if eos?
    push_passage
    return @result
  end
  nil
end

#format_error ⇒ Object 



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# File 'lib/scripref/parser.rb', line 289

def format_error
  if error
    format("%s\n%s\n%s^", error, string, ' ' * pointer)
  else
    ''
  end
end

#give_up(msg) ⇒ Object 



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# File 'lib/scripref/parser.rb', line 284

def give_up msg
  @error = msg
  fail ParserError, format_error
end

#hyphen ⇒ Object

try to parse hyphen



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# File 'lib/scripref/parser.rb', line 182

def hyphen
  if s = scan(hyphen_re)
    @text << s
    s
  else
    nil
  end
end

#init_str2book_num ⇒ Object 



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# File 'lib/scripref/parser.rb', line 261

def init_str2book_num
  unless @str2book_num
    @str2book_num = {}
    book_names.each_with_index do |bn, i|
      bn.names.each do |n|
        @str2book_num[n] = i+1
      end
      bn.abbrevs.each do |n|
        @str2book_num[n] = i+1
      end
    end
  end
end

#inspect ⇒ Object 



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# File 'lib/scripref/parser.rb', line 280

def inspect
  "#<#{self.class} #{@mods.inspect}>"
end

#parse(str) ⇒ Object Also known as: <<

Parsing a string of a scripture reference



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# File 'lib/scripref/parser.rb', line 21

def parse str
  self.string = str
  @result = []
  @error = nil
  start
end

#pass_sep ⇒ Object

try to parse separator between passages



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# File 'lib/scripref/parser.rb', line 192

def pass_sep
  if s = scan(pass_sep_re)
    push_passage
    @result << PassSep.new(s)
    s
  else
    nil
  end
end

#push_passage ⇒ Object 



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# File 'lib/scripref/parser.rb', line 234

def push_passage
  @result << Passage.new(text: @text, b1: @b1, c1: @c1, v1: @v1, b2: @b2, c2: @c2, v2: @v2, a1: @a1, a2: @a2)
  @text = ''
  @a1 = @a2 = nil
end

#start ⇒ Object

start of parsing grammer



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# File 'lib/scripref/parser.rb', line 29

def start
  @text = ''
  b1 or give_up 'Book expected!'
end

#str2book_num(str) ⇒ Object 



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# File 'lib/scripref/parser.rb', line 275

def str2book_num str
  init_str2book_num
  @str2book_num[str]
end

#v1 ⇒ Object

try to parse first verse



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# File 'lib/scripref/parser.rb', line 78

def v1
  s = scan(verse_re) or return nil
  @text << s
  @v1 = @v2 = s.to_i

  if addon = verse_addon
    @a1 = addon
  end

  if postfix = verse_postfix
    @v2 = postfix
  end

  if hyphen
    b2 or (
    if check(Regexp.new(chapter_re.source + cv_sep_re.source))
      c2
    else
      v2 or give_up 'Chapter or verse expected!'
    end)
  elsif pass_sep
    b1 or c1 or give_up 'Book or chapter expected!'
  elsif verse_sep
    v1 or give_up 'Verse expected!'
  else
    epsilon or give_up 'EOS or passage separator or verse separator or hyphen expected!'
  end
end

#v2 ⇒ Object

try to parse second verse



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# File 'lib/scripref/parser.rb', line 144

def v2
  s = scan(verse_re) or return nil
  @text << s
  @v2 = s.to_i

  if addon = verse_addon
    @a2 = addon
  end

  if verse_sep
    v1 or give_up 'Verse expected!'
  elsif pass_sep
    b1 or c1 or give_up 'Book or chapter expected!'
  else
    epsilon or give_up 'EOS or verse separator or passage separator expected!'
  end
end

#verse_addon ⇒ Object

try to parse addons for verses



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# File 'lib/scripref/parser.rb', line 214

def verse_addon
  if s = scan(verse_addon_re)
    @text << s
    s.to_sym
  else
    nil
  end
end

#verse_postfix ⇒ Object

try to parse postfixes for verse



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# File 'lib/scripref/parser.rb', line 224

def verse_postfix
  s = (scan(postfix_one_following_verse_re) or scan(postfix_more_following_verses_re))
  if s
    @text << s
    s.to_sym
  else
    nil
  end
end

#verse_sep ⇒ Object

try to parse verse separator



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# File 'lib/scripref/parser.rb', line 203

def verse_sep
  if s = scan(verse_sep_re)
    push_passage
    @result << VerseSep.new(s)
    s
  else
    nil
  end
end