# Nick's web site: Ruby helpers for processing
#
# Copyright © 2018 Nick Bowler
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

require 'nokogiri'

Xmlns = {
    'xhtml' => 'http://www.w3.org/1999/xhtml'
}.freeze

def to_xhtml(subpath = "", item = @item)
    if item.identifier =~ '/index.*'
        ret =  "/" + subpath + "/index.xhtml"
    else
        ret = item.identifier.without_ext + "/" + subpath + "/index.xhtml"
    end

    return ret.gsub(/\/+/, "/")
end

def item_source(item = @item)
    filename = "content" + item.identifier

    if File.file? filename then
        return filename
    end

    return nil
end

def item_uri(item = @item, rep: :default)
    return item.path(rep: rep).gsub(/\/index.[^.]*$/, "/")
end

def find_license(license)
    matches = @items.find_all("/license/" + license + ".*")

    raise("License not defined: " + license) if !matches.length
    return matches.sort_by { |item| item.identifier } [0]
end