1 files changed, 60 insertions, 12 deletions

diff --git a/lib/pleroma/html.ex b/lib/pleroma/html.ex
index 05253157e..cf6c0ee0a 100644
--- a/lib/pleroma/html.ex
+++ b/lib/pleroma/html.ex
@@ -28,27 +28,40 @@ defmodule Pleroma.HTML do
   def filter_tags(html), do: filter_tags(html, nil)
   def strip_tags(html), do: Scrubber.scrub(html, Scrubber.StripTags)
 
-  def get_cached_scrubbed_html_for_object(content, scrubbers, object, module) do
-    key = "#{module}#{generate_scrubber_signature(scrubbers)}|#{object.id}"
-    Cachex.fetch!(:scrubber_cache, key, fn _key -> ensure_scrubbed_html(content, scrubbers) end)
+  def get_cached_scrubbed_html_for_activity(content, scrubbers, activity, key \\ "") do
+    key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
+
+    Cachex.fetch!(:scrubber_cache, key, fn _key ->
+      object = Pleroma.Object.normalize(activity)
+      ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false)
+    end)
   end
 
-  def get_cached_stripped_html_for_object(content, object, module) do
-    get_cached_scrubbed_html_for_object(
+  def get_cached_stripped_html_for_activity(content, activity, key) do
+    get_cached_scrubbed_html_for_activity(
       content,
       HtmlSanitizeEx.Scrubber.StripTags,
-      object,
-      module
+      activity,
+      key
     )
   end
 
   def ensure_scrubbed_html(
         content,
-        scrubbers
+        scrubbers,
+        false = _fake
       ) do
     {:commit, filter_tags(content, scrubbers)}
   end
 
+  def ensure_scrubbed_html(
+        content,
+        scrubbers,
+        true = _fake
+      ) do
+    {:ignore, filter_tags(content, scrubbers)}
+  end
+
   defp generate_scrubber_signature(scrubber) when is_atom(scrubber) do
     generate_scrubber_signature([scrubber])
   end
@@ -93,14 +106,31 @@ defmodule Pleroma.HTML.Scrubber.TwitterText do
 
   # links
   Meta.allow_tag_with_uri_attributes("a", ["href", "data-user", "data-tag"], @valid_schemes)
-  Meta.allow_tag_with_these_attributes("a", ["name", "title", "class"])
+
+  Meta.allow_tag_with_this_attribute_values("a", "class", [
+    "hashtag",
+    "u-url",
+    "mention",
+    "u-url mention",
+    "mention u-url"
+  ])
+
+  Meta.allow_tag_with_this_attribute_values("a", "rel", [
+    "tag",
+    "nofollow",
+    "noopener",
+    "noreferrer"
+  ])
+
+  Meta.allow_tag_with_these_attributes("a", ["name", "title"])
 
   # paragraphs and linebreaks
   Meta.allow_tag_with_these_attributes("br", [])
   Meta.allow_tag_with_these_attributes("p", [])
 
   # microformats
-  Meta.allow_tag_with_these_attributes("span", ["class"])
+  Meta.allow_tag_with_this_attribute_values("span", "class", ["h-card"])
+  Meta.allow_tag_with_these_attributes("span", [])
 
   # allow inline images for custom emoji
   @allow_inline_images Keyword.get(@markup, :allow_inline_images)
@@ -135,7 +165,23 @@ defmodule Pleroma.HTML.Scrubber.Default do
   Meta.strip_comments()
 
   Meta.allow_tag_with_uri_attributes("a", ["href", "data-user", "data-tag"], @valid_schemes)
-  Meta.allow_tag_with_these_attributes("a", ["name", "title", "class"])
+
+  Meta.allow_tag_with_this_attribute_values("a", "class", [
+    "hashtag",
+    "u-url",
+    "mention",
+    "u-url mention",
+    "mention u-url"
+  ])
+
+  Meta.allow_tag_with_this_attribute_values("a", "rel", [
+    "tag",
+    "nofollow",
+    "noopener",
+    "noreferrer"
+  ])
+
+  Meta.allow_tag_with_these_attributes("a", ["name", "title"])
 
   Meta.allow_tag_with_these_attributes("abbr", ["title"])
 
@@ -150,11 +196,13 @@ defmodule Pleroma.HTML.Scrubber.Default do
   Meta.allow_tag_with_these_attributes("ol", [])
   Meta.allow_tag_with_these_attributes("p", [])
   Meta.allow_tag_with_these_attributes("pre", [])
-  Meta.allow_tag_with_these_attributes("span", ["class"])
   Meta.allow_tag_with_these_attributes("strong", [])
   Meta.allow_tag_with_these_attributes("u", [])
   Meta.allow_tag_with_these_attributes("ul", [])
 
+  Meta.allow_tag_with_this_attribute_values("span", "class", ["h-card"])
+  Meta.allow_tag_with_these_attributes("span", [])
+
   @allow_inline_images Keyword.get(@markup, :allow_inline_images)
 
   if @allow_inline_images do