#!/usr/bin/ruby -I../.. -rmagic_xml
#Copyright (c) 2006-2007 Tomasz Wegrzanowski <Tomasz.Wegrzanowski@gmail.com>
#
#Permission is hereby granted, free of charge, to any person obtaining a
#copy of this software and associated documentation files (the "Software"),
#to deal in the Software without restriction, including without limitation
#the rights to use, copy, modify, merge, publish, distribute, sublicense,
#and/or sell copies of the Software, and to permit persons to whom the
#Software is furnished to do so, subject to the following conditions:
#
#The above copyright notice and this permission notice shall be included in
#all copies or substantial portions of the Software.
#
#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
#OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
#ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#DEALINGS IN THE SOFTWARE.


XML.results! {
    doc = XML.load('bib.xml')
    a = doc.descendants(:author)
    books = doc.children(:book)

    a.map{|node| 
        [node[:@last], node[:@first]]
    }.uniq.sort.each {|last, first|
        result! {
            author! {
                last! last
                first! first
            }
            books.each{|b|
                next unless b.children(:author).any?{|ba|
                    ba[:@last] == last and ba[:@first] == first
                }
                add! b.children(:title)
            }
        }
    }
}