class MetalArchives::Parsers::Parser

# File lib/metal_archives/parsers/parser.rb, line 21
def parse_country(input)
  ISO3166::Country.find_country_by_name input
end

# File lib/metal_archives/parsers/parser.rb, line 48
def parse_genre(input)
  genres = []
  # Split fields
  input.split(",").each do |genre|
    ##
    # Start with a single empty genre string. Split the genre by spaces
    # and process each component. If a component does not have a slash,
    # concatenate it to all genre strings present in +temp+. If it does
    # have a slash present, duplicate all genre strings, and concatenate
    # the first component (before the slash) to the first half, and the
    # last component to the last half. +temp+ now has an array of genre
    # combinations.
    #
    # 'Traditional Heavy/Power Metal' => ['Traditional Heavy', 'Traditional Power']
    # 'Traditional/Classical Heavy/Power Metal' => [
    #                                       'Traditional Heavy', 'Traditional Power',
    #                                       'Classical Heavy', 'Classical Power']
    #
    temp = [""]
    genre.downcase.split.reject { |g| ["(early)", "(later)", "metal"].include? g }.each do |g|
      if g.include? "/"
        # Duplicate all WIP genres
        temp2 = temp.dup

        # Assign first and last components to temp and temp2 respectively
        split = g.split "/"
        temp.map! { |t| t.empty? ? split.first.capitalize : "#{t.capitalize} #{split.first.capitalize}" }
        temp2.map! { |t| t.empty? ? split.last.capitalize : "#{t.capitalize} #{split.last.capitalize}" }

        # Add both genre trees
        temp += temp2
      else
        temp.map! { |t| t.empty? ? g.capitalize : "#{t.capitalize} #{g.capitalize}" }
      end
    end
    genres += temp
  end
  genres.uniq
end

# File lib/metal_archives/parsers/parser.rb, line 91
def parse_year_range(input)
  r = input.split("-")
  date_start = (r.first == "?" ? nil : NilDate.new(r.first.to_i))
  date_end = if r.length > 1
               (r.last == "?" || r.last == "present" ? nil : NilDate.new(r.last.to_i))
             else
               date_start.dup
             end

  MetalArchives::Range.new date_start, date_end
end

# File lib/metal_archives/parsers/parser.rb, line 30
def sanitize(input)
  input.gsub(/^"/, "").gsub(/"$/, "").strip
end