Class: Scripref::Parser

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

Constant Summary collapse

NUMBER_RE = 
/\d+\s*/

Instance Method Summary collapse

Constructor Details

#initialize(*mods) ⇒ Parser

Returns a new instance of Parser.

Parameters:

  • mods —

    one or more modules to include



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# File 'lib/scripref/parser.rb', line 11

def initialize *mods
  @mods = mods
  mods.each do |m|
    m.class_eval do
      extend ConstReader
      const_reader constants
    end
    extend m
  end
end

Instance Method Details

#b1 ⇒ Object

try to parse first book



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# File 'lib/scripref/parser.rb', line 37

def b1
  s = scan(book_re) or return nil
  @text << s
  @b1 = @b2 = book2num(s)

  if check(Regexp.new(NUMBER_RE.source + cv_sep_re.source))
    @c1 = @v1 = nil
    @c2 = @v2 = nil
    c1
  else
    if Scripref.book_has_only_one_chapter?(@b1)
      @c1 = @c2 = 1
      epsilon or (hyphen and b2) or v1 or nil
    else
      @c1 = @v1 = nil
      @c2 = @v2 = nil
      epsilon or (hyphen and b2) or c1 or nil
    end
  end
end

#b2 ⇒ Object

try to parse second book



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# File 'lib/scripref/parser.rb', line 107

def b2
  s = scan(book_re) or return nil
  @text << s
  @b2 = book2num(s)
  @c2 = @v2 = nil

  if check(Regexp.new(NUMBER_RE.source + cv_sep_re.source))
    c2
  else
    if Scripref.book_has_only_one_chapter?(@b2)
      @c2 = 1
      epsilon or v2 or nil
    else
      epsilon or c2 or nil
    end
  end
end

#book2num(str) ⇒ Object 



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# File 'lib/scripref/parser.rb', line 227

def book2num str
  return nil unless book_re =~str
  books_res.each_with_index do |re, i|
   if str =~ Regexp.new('^' << re.to_s << '$')
     num = i + 1
     return num
   end
  end
end

#c1 ⇒ Object

try parse first chapter



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# File 'lib/scripref/parser.rb', line 59

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

  if cv_sep
    v1 or nil
  elsif hyphen
    b2 or c2 or nil
  elsif pass_sep
    b1 or c1
  else
    epsilon or nil
  end
end

#c2 ⇒ Object

try to parse second chapter



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# File 'lib/scripref/parser.rb', line 126

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

  if cv_sep
    v2 or nil
  else
    epsilon or nil
  end
end

#cv_sep ⇒ Object

try to parse separator or chapter and verse



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# File 'lib/scripref/parser.rb', line 170

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 161

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

#hyphen ⇒ Object

try to parse hyphen



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# File 'lib/scripref/parser.rb', line 180

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

#inspect ⇒ Object 



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# File 'lib/scripref/parser.rb', line 237

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

#parse(str) ⇒ Object

Parsing a string of a scripture reference

Parameters:

  • str —

    string to parse



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# File 'lib/scripref/parser.rb', line 24

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

#pass_sep ⇒ Object

try to parse separator between passages



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# File 'lib/scripref/parser.rb', line 190

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

#push_passage ⇒ Object 



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# File 'lib/scripref/parser.rb', line 221

def push_passage
  @result << Passage.new(@text, @b1, @c1, @v1, @b2, @c2, @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 31

def start
  @text = ''
  b1 or []
end

#v1 ⇒ Object

try to parse first verse



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# File 'lib/scripref/parser.rb', line 76

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

  if addon = verse_addon
    case addon
    when :f, :ff
      @v2 = addon
    when :a, :b, :c
      @a1 = addon
    end
  end

  if hyphen
    b2 or (
    if check(Regexp.new(NUMBER_RE.source + cv_sep_re.source))
      c2
    else
      v2 or nil
    end)
  elsif pass_sep
    b1 or c1
  elsif verse_sep
    v1
  else
    epsilon or nil
  end
end

#v2 ⇒ Object

try to parse second verse



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# File 'lib/scripref/parser.rb', line 139

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

  if addon = verse_addon
    case addon
    when :a, :b, :c
      @a2 = addon
    end
  end

  if verse_sep
    v1
  elsif pass_sep
    b1 or c1
  else
    epsilon or nil
  end
end

#verse_addon ⇒ Object

try to parse addons for verses



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# File 'lib/scripref/parser.rb', line 212

def verse_addon
  if s = scan(verse_addon_re)
    @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 201

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