views.py

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

from .models import Publication

class PublicationsFeedView(View):

    # 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; )
    # If we don't convert the rich text fields to plain text)
    #    2DO: Remove editor artefacts from ricch text fields ("<p>blabla</p>") ?
    #    2DO: Remove <i> from source fields ("<p><i>Mol Cell.</i></p>") ?
    # maybe use xml.dom for that?

    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;