working rss feed for shelves

bookwyrm/templates/rss/edition.html

@@ -0,0 +1,4 @@
+{{obj.title}} by {{obj.author_text}}
+{{obj.description|default:""}}
+{% if obj.description %}ISBN: {{item.isbn_10|default:""}}{% endif %}
+{% if obj.description %}ISBN13: {{item.isbn_13}}{% endif %}

bookwyrm/urls.py

@@ -540,11 +540,21 @@ urlpatterns = [
         views.Shelf.as_view(),
         name="shelf",
     ),
+    re_path(
+        rf"^{USER_PATH}/(shelf|books)/(?P<shelf_identifier>[\w-]+)(/rss)?/?$",
+        views.rss_feed.RssShelfFeed(),
+        name="shelf-rss",
+    ),
     re_path(
         rf"^{LOCAL_USER_PATH}/(books|shelf)/(?P<shelf_identifier>[\w-]+)(.json)?/?$",
         views.Shelf.as_view(),
         name="shelf",
     ),
+    re_path(
+        rf"^{LOCAL_USER_PATH}/(books|shelf)/(?P<shelf_identifier>[\w-]+)(/rss)?/?$",
+        views.rss_feed.RssShelfFeed(),
+        name="shelf-rss",
+    ),
     re_path(r"^create-shelf/?$", views.create_shelf, name="shelf-create"),
     re_path(r"^delete-shelf/(?P<shelf_id>\d+)/?$", views.delete_shelf),
     re_path(r"^shelve/?$", views.shelve),

bookwyrm/views/rss_feed.py

@@ -3,6 +3,7 @@
 from django.contrib.syndication.views import Feed
 from django.template.loader import get_template
 from django.utils.translation import gettext_lazy as _
+from django.shortcuts import get_object_or_404
 from ..models import Review, Quotation, Comment
 
 from .helpers import get_user_from_username
@@ -177,3 +178,65 @@ class RssCommentsOnlyFeed(Feed):
     def item_pubdate(self, item):
         """publication date of the item"""
         return item.published_date
+
+
+class RssShelfFeed(Feed):
+    """serialize a shelf activity in rss"""
+
+    description_template = "rss/edition.html"
+
+    def item_title(self, item):
+        """render the item title"""
+        if hasattr(item, "pure_name") and item.pure_name:
+            return item.pure_name
+        authors = item.authors
+        authors.display_name = f"{item.author_text}:"
+        template = get_template("rss/title.html")
+        return template.render({"user": authors, "item_title": item.title}).strip()
+
+    def get_object(
+        self, request, shelf_identifier, username
+    ):  # pylint: disable=arguments-differ
+        """the user who's posts get serialized"""
+        user = get_user_from_username(request.user, username)
+        # always get privacy, don't support rss over anything private
+        # Shelf.privacy_filter(request.user).filter(user=user).all()
+
+        # TODO: get the SHELF of the object
+        shelf = get_object_or_404(user.shelf_set, identifier=shelf_identifier)
+        shelf.raise_visible_to_user(request.user)
+        return shelf
+
+    def link(self, obj):
+        """link to the shelf"""
+        return obj.local_path
+
+    def title(self, obj):
+        """title of the rss feed entry"""
+        return _(f"Books added to {obj.name}")
+
+    def items(self, obj):
+        """the user's activity feed"""
+        return obj.books.order_by("-published_date")[:10]
+
+    def item_link(self, item):
+        """link to the status"""
+        return item.local_path
+
+    def item_pubdate(self, item):
+        """publication date of the item"""
+        return item.published_date
+
+    def description(self, obj):
+        # if there's a description, lets add it. Not everyone puts a description in.
+        desc = ""
+        if obj.description:
+            desc = f"  {obj.description}"
+        return f"Books added to the '{obj.name}' shelf for {obj.user.name}.{desc}"
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        # TODO: gotta check that this is the SHELF user!
+        context["user"] = kwargs["request"].user
+        context["shelf"] = kwargs["obj"]
+        return context