views.py

from django.http import HttpResponse
from django.views.generic.base import View

from .models import Publication


class PublicationsFeedView(View):

    # IMPORTANT: Quick hack to get experiments going, This assumes, that the
    # editor of the publications is trusted to put only expected values into the
    # fields.
    #
    # 2DO: check for legal XML characters everywhere https://www.w3.org/TR/xml/#NT-Char
    # 2DO: Put HTML content in <![CDATA[...]]> ?
    # If we don't make DOI into element:
    #   2DO: escape invalid characterds in attribute ( &quot; &amp; &lt; &gt; )
    # If we don't convert the rich text fields to plain text maybe:
    #    2DO: Remove <p> editor artefacts from rich text fields ("<p>blabla</p>") ?
    #    2DO: Remove <i> from source fields ("<p><i>Mol Cell.</i></p>") ?
    # maybe use xml.dom for that?
    # 2DO: ... ?

    def get(self, request, *args, **kwargs):
        response = HttpResponse(content_type="application/rss+xml; charset=utf-8")
        response.write('<?xml version="1.0" encoding="utf-8" ?>\n')
        response.write('<publication-list>\n')
        for item in Publication.objects.order_by('sort_order')[:3]:
            response.write(f'  <publication doi="{item.doi}">\n')
            response.write(f'    <authors>{item.authors}</authors>\n')
            response.write(f'    <title>{item.title}</title>\n')
            response.write(f'    <source>{item.source}</source>\n')
            response.write(f'    <groups>{item.groups}</groups>\n')
            response.write('  </publication>\n')
        response.write('</publication-list>\n')
        return response


class PublicationsRssFeedView(View):

    # IMPORTANT: Quick hack to get experiments going, This assumes, that the
    # editor of the publications is trusted to put only expected values into the
    # fields.
    #
    # 2DO: check for legal XML characters everywhere https://www.w3.org/TR/xml/#NT-Char
    # 2DO: Put HTML content in <![CDATA[...]]> ?
    # If we don't make DOI into element:
    #   2DO: escape invalid characterds in attribute ( &quot; &amp; &lt; &gt; )
    # If we don't convert the rich text fields to plain text maybe:
    #    2DO: Remove <p> editor artefacts from rich text fields ("<p>blabla</p>") ?
    #    2DO: Remove <i> from source fields ("<p><i>Mol Cell.</i></p>") ?
    # maybe use xml.dom for that?
    # 2DO: ... ?

    def get(self, request, *args, **kwargs):
        response = HttpResponse(content_type="application/rss+xml; charset=utf-8")
        response.write('<?xml version="1.0" encoding="utf-8" ?>\n')
        response.write('<rss version="2.0">\n')
        response.write('  <channel xmlns:pl="http://www.molgen.mpg.de/xml/publication_feed">\n')
        # the next three elements are required https://www.rssboard.org/rss-specification
        response.write('    <title>Last Three Publications</title>\n')
        response.write('    <link>https://intranet.molgen.mpg.de/</link>\n')
        response.write('    <description>The last three publications published on the Intranet site</description>\n')
        for item in Publication.objects.order_by('sort_order')[:3]:
            # all elements optional, but either title or description allowed
            response.write(f'    <item pl:doi="{item.doi}">\n')
            response.write(f'      <title>{item.title}</title>\n')
            response.write(f'      <pl:authors>{item.authors}</pl:authors>\n')
            response.write(f'      <pl:title>{item.title}</pl:title>\n')
            response.write(f'      <pl:source>{item.source}</pl:source>\n')
            response.write(f'      <pl:groups>{item.groups}</pl:groups>\n')
            response.write('     </item>\n')
        response.write('  </channel>\n')
        response.write('</rss>\n')
        return response