module Gzlib

# File lib/gzlib.rb, line 10
def list(*para)
  style search(*para)
end

# File lib/gzlib.rb, line 6
def search(*para)
  Search.new(*para)
end

# File lib/gzlib.rb, line 22
def book_style book
  "#{book.title} #{book.author}\n#{book.publisher} #{book.year}\n#{position_style book.positions}"
end

# File lib/gzlib.rb, line 26
def position_style poss
  free = poss.
    reject(&:loan?).
    group_by(&:lib_callno).
    map{|callno_lib, poss| [callno_lib, "free x #{poss.count}"]}

  loan = poss.
    select(&:loan?).
    sort_by(&:returnDate).
    map{|pos| [pos.lib_callno, pos.returnDate]}

  (free + loan).map{|status| status.join(' ')}.join("\n")
end

# File lib/gzlib.rb, line 16
def style search
  search.first(10).map do |book|
    book_style book
  end.join "\n\n"
end