Chat: Allow posting without content if an attachment is present.

test/web/activity_pub/object_validator_test.exs

@@ -103,6 +103,38 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidatorTest do
       assert object["attachment"]
     end
 
+    test "validates for a basic object with an attachment but without content", %{
+      valid_chat_message: valid_chat_message,
+      user: user
+    } do
+      file = %Plug.Upload{
+        content_type: "image/jpg",
+        path: Path.absname("test/fixtures/image.jpg"),
+        filename: "an_image.jpg"
+      }
+
+      {:ok, attachment} = ActivityPub.upload(file, actor: user.ap_id)
+
+      valid_chat_message =
+        valid_chat_message
+        |> Map.put("attachment", attachment.data)
+        |> Map.delete("content")
+
+      assert {:ok, object, _meta} = ObjectValidator.validate(valid_chat_message, [])
+
+      assert object["attachment"]
+    end
+
+    test "does not validate if the message has no content", %{
+      valid_chat_message: valid_chat_message
+    } do
+      contentless =
+        valid_chat_message
+        |> Map.delete("content")
+
+      refute match?({:ok, _object, _meta}, ObjectValidator.validate(contentless, []))
+    end
+
     test "does not validate if the message is longer than the remote_limit", %{
       valid_chat_message: valid_chat_message
     } do

test/web/common_api/common_api_test.exs

@@ -27,6 +27,29 @@ defmodule Pleroma.Web.CommonAPITest do
   describe "posting chat messages" do
     setup do: clear_config([:instance, :chat_limit])
 
+    test "it posts a chat message without content but with an attachment" do
+      author = insert(:user)
+      recipient = insert(:user)
+
+      file = %Plug.Upload{
+        content_type: "image/jpg",
+        path: Path.absname("test/fixtures/image.jpg"),
+        filename: "an_image.jpg"
+      }
+
+      {:ok, upload} = ActivityPub.upload(file, actor: author.ap_id)
+
+      {:ok, activity} =
+        CommonAPI.post_chat_message(
+          author,
+          recipient,
+          nil,
+          media_id: upload.id
+        )
+
+      assert activity
+    end
+
     test "it posts a chat message" do
       author = insert(:user)
       recipient = insert(:user)

test/web/pleroma_api/controllers/chat_controller_test.exs

@@ -53,6 +53,20 @@ defmodule Pleroma.Web.PleromaAPI.ChatControllerTest do
       assert result["chat_id"] == chat.id |> to_string()
     end
 
+    test "it fails if there is no content", %{conn: conn, user: user} do
+      other_user = insert(:user)
+
+      {:ok, chat} = Chat.get_or_create(user.id, other_user.ap_id)
+
+      result =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/v1/pleroma/chats/#{chat.id}/messages")
+        |> json_response_and_validate_schema(400)
+
+      assert result
+    end
+
     test "it works with an attachment", %{conn: conn, user: user} do
       file = %Plug.Upload{
         content_type: "image/jpg",
@@ -70,13 +84,11 @@ defmodule Pleroma.Web.PleromaAPI.ChatControllerTest do
         conn
         |> put_req_header("content-type", "application/json")
         |> post("/api/v1/pleroma/chats/#{chat.id}/messages", %{
-          "content" => "Hallo!!",
           "media_id" => to_string(upload.id)
         })
         |> json_response_and_validate_schema(200)
 
-      assert result["content"] == "Hallo!!"
-      assert result["chat_id"] == chat.id |> to_string()
+      assert result["attachment"]
     end
   end