# Source code for ebooklib.plugins.booktype

    # This file is part of EbookLib.
    # Copyright (c) 2013 Aleksandar Erkalovic <aerkalov@gmail.com>
    #
    # EbookLib is free software: you can redistribute it and/or modify
    # it under the terms of the GNU Affero General Public License as published by
    # the Free Software Foundation, either version 3 of the License, or
    # (at your option) any later version.
    #
    # EbookLib 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 Affero General Public License for more details.
    #
    # You should have received a copy of the GNU Affero General Public License
    # along with EbookLib.  If not, see <http://www.gnu.org/licenses/>.

    from ebooklib.plugins.base import BasePlugin
    from ebooklib.utils import parse_html_string

    class BooktypeLinks(BasePlugin):
        NAME = "Booktype Links"

        def __init__(self, booktype_book):
            self.booktype_book = booktype_book

        def html_before_write(self, book, chapter):
            try:
                from urlparse import urljoin, urlparse
            except ImportError:
                from urllib.parse import urljoin, urlparse

            from lxml import etree

            try:
                tree = parse_html_string(chapter.content)
            except Exception:
                return

            root = tree.getroottree()

            if len(root.find("body")) != 0:
                body = tree.find("body")

                # should also be aware to handle
                # ../chapter/
                # ../chapter/#reference
                # ../chapter#reference

                for _link in body.xpath("//a"):
                    # This is just temporary for the footnotes
                    if _link.get("href", "").find("InsertNoteID") != -1:
                        _ln = _link.get("href", "")
                        i = _ln.find("#")
                        _link.set("href", _ln[i:])

                        continue

                    _u = urlparse(_link.get("href", ""))

                    # Let us care only for internal links at the moment
                    if _u.scheme == "":
                        if _u.path != "":
                            _link.set("href", "{path}.xhtml".format(path=_u.path))  # noqa: UP032

                        if _u.fragment != "":
                            _link.set("href", urljoin(_link.get("href"), "#{fragment}".format(fragment=_u.fragment)))  # noqa: UP032

                        if _link.get("name") is not None:
                            _link.set("id", _link.get("name"))
                            etree.strip_attributes(_link, "name")

            chapter.content = etree.tostring(tree, pretty_print=True, encoding="utf-8")

    class BooktypeFootnotes(BasePlugin):
        NAME = "Booktype Footnotes"

        def __init__(self, booktype_book):
            self.booktype_book = booktype_book

        def html_before_write(self, book, chapter):
            from lxml import etree

            from ebooklib import epub

            try:
                tree = parse_html_string(chapter.content)
            except Exception:
                return

            root = tree.getroottree()

            if len(root.find("body")) != 0:
                body = tree.find("body")

                # <span id="InsertNoteID_1_marker1" class="InsertNoteMarker">
                #   <sup><a href="#InsertNoteID_1">1</a></sup>
                # <span>

                # <ol id="InsertNote_NoteList">
                #   <li id="InsertNoteID_1">prvi footnote
                #     <span id="InsertNoteID_1_LinkBacks">
                #       <sup><a href="#InsertNoteID_1_marker1">^</a></sup>
                #     </span>
                #   </li>
                # </ol>

                # <a epub:type="noteref" href="#n1">1</a></p>
                # <aside epub:type="footnote" id="n1"><p>These have been corrected in this EPUB3 edition.</p></aside>
                for footnote in body.xpath('//span[@class="InsertNoteMarker"]'):
                    footnote_id = footnote.get("id")[:-8]
                    a = footnote.getchildren()[0].getchildren()[0]

                    footnote_text = body.xpath('//li[@id="{footnote_id}"]'.format(footnote_id=footnote_id))[0]  # noqa: UP032

                    a.attrib["{%s}type" % epub.NAMESPACES["EPUB"]] = "noteref"  # noqa
                    ftn = etree.SubElement(body, "aside", {"id": footnote_id})
                    ftn.attrib["{%s}type" % epub.NAMESPACES["EPUB"]] = "footnote"  # noqa
                    ftn_p = etree.SubElement(ftn, "p")
                    ftn_p.text = footnote_text.text

                old_footnote = body.xpath('//ol[@id="InsertNote_NoteList"]')
                if len(old_footnote) > 0:
                    body.remove(old_footnote[0])

            chapter.content = etree.tostring(tree, pretty_print=True, encoding="utf-8")