Parse object link as quoteUrl

test/fixtures/quote_post/fep-e232-tag-example.json

@@ -0,0 +1,17 @@
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "type": "Note",
+  "content": "This is a quote:<br>RE: https://server.example/objects/123",
+  "tag": [
+    {
+      "type": "Link",
+      "mediaType": "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"",
+      "href": "https://server.example/objects/123",
+      "name": "RE: https://server.example/objects/123"
+    }
+  ],
+  "id": "https://server.example/objects/1",
+  "to": "https://server.example/users/1",
+  "attributedTo": "https://server.example/users/1",
+  "actor": "https://server.example/users/1"
+}

test/pleroma/web/activity_pub/object_validators/article_note_page_validator_test.exs

@@ -146,4 +146,16 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNotePageValidatorTest
     assert cng.valid?
     assert cng.changes.quoteUrl == "https://misskey.io/notes/8vs6wxufd0"
   end
+
+  test "Parse tag as quote" do
+    # https://codeberg.org/fediverse/fep/src/branch/main/fep/e232/fep-e232.md
+
+    insert(:user, ap_id: "https://server.example/users/1")
+
+    data = File.read!("test/fixtures/quote_post/fep-e232-tag-example.json") |> Jason.decode!()
+    cng = ArticleNotePageValidator.cast_and_validate(data)
+
+    assert cng.valid?
+    assert cng.changes.quoteUrl == "https://server.example/objects/123"
+  end
 end