lib/lyric_parser.rb

   1 module Lyrix
   2   class LyricParser
   3     DEFAULT_OPTIONS = {}
   4
   5     def initialize(lyrics, options = {})
   6       @options = DEFAULT_OPTIONS.merge(options)
   7       @lyrics = lyrics
   8     end
   9
  10     def parse
  11       @parsed_lyrics ||= parse!
  12       @parsed_lyrics
  13     end
  14
  15     def parse!
  16       parsed = {}
  17
  18       parsed[:slides] = @lyrics.strip.gsub("\r\n", "\n").split(/\n[ \t]*\n/)
  19       parsed[:slides].collect! { |s| s.strip }
  20       parsed[:slides].reject! { |s| s.empty? }
  21
  22       parsed[:slides].each_with_index do |s,idx|
  23         [:chorus, :bridge].each do |sub|
  24           if s =~ Regexp.new("^\\[#{sub}\\]") and !parsed.has_key?(sub)
  25             parsed[sub] = s.split("\n")[1..-1].join("\n")
  26             parsed[:slides][idx] = parsed[sub]
  27           end
  28
  29           parsed[:slides][idx].gsub!("[#{sub}]", parsed[sub]) if parsed[sub]
  30         end
  31
  32         if s =~ /^\[([2-9])x\]/
  33           parsed[:slides][idx] = (1..($1.to_i)).collect { s.split("\n")[1..-1].join("\n") }
  34         end
  35       end
  36
  37       parsed[:slides].flatten!
  38
  39       parsed[:slides].each_with_index do |s,idx|
  40         slide = parsed[:slides][idx].split("\n")
  41         slide.each_with_index do |line,i|
  42           puts line.inspect
  43           if line.strip =~ /\[([2-9])x\]$/
  44             num = $1.to_i
  45             line = line.gsub("[#{num}x]", "").strip
  46             slide[i] = (1..num).collect { line }
  47           end
  48         end
  49         parsed[:slides][idx] = slide.flatten.join("\n")
  50       end
  51
  52       parsed
  53     end
  54
  55     def to_slides
  56       parse[:slides]
  57     end
  58   end
  59 end