Get avatar and banner from AP users.

lib/pleroma/user.ex

@@ -105,7 +105,7 @@ def update_changeset(struct, params \\ %{}) do
 
   def upgrade_changeset(struct, params \\ %{}) do
     struct
-    |> cast(params, [:bio, :name, :info, :follower_address])
+    |> cast(params, [:bio, :name, :info, :follower_address, :avatar])
     |> unique_constraint(:nickname)
     |> validate_format(:nickname, ~r/^[a-zA-Z\d]+$/)
     |> validate_length(:bio, min: 1, max: 1000)

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -264,15 +264,27 @@ def fetch_and_prepare_user_from_ap_id(ap_id) do
     with {:ok, %{status_code: 200, body: body}} <- @httpoison.get(ap_id, ["Accept": "application/activity+json"]),
     {:ok, data} <- Poison.decode(body)
       do
+      avatar = %{
+        "type" => "Image",
+        "url" => [%{"href" => data["icon"]["url"]}]
+      }
+
+      banner = %{
+        "type" => "Image",
+        "url" => [%{"href" => data["image"]["url"]}]
+      }
+
       user_data = %{
         ap_id: data["id"],
         info: %{
           "ap_enabled" => true,
-          "source_data" => data
+          "source_data" => data,
+          "banner" => banner
         },
+        avatar: avatar,
         nickname: "#{data["preferredUsername"]}@#{URI.parse(ap_id).host}",
         name: data["name"],
-        follower_address: data["followers"]
+        follower_address: data["followers"],
       }
 
       {:ok, user_data}

test/web/activity_pub/transmogrifier_test.exs

@@ -204,6 +204,8 @@ test "it upgrades a user to activitypub" do
 
       activity = Repo.get(Activity, activity.id)
       assert user.follower_address in activity.recipients
+      assert %{"url" => [%{"href" => "https://cdn.niu.moe/accounts/avatars/000/033/323/original/fd7f8ae0b3ffedc9.jpeg"}]} = user.avatar
+      assert %{"url" => [%{"href" => "https://cdn.niu.moe/accounts/headers/000/033/323/original/850b3448fa5fd477.png"}]} = user.info["banner"]
       refute "..." in activity.recipients
 
       unrelated_activity = Repo.get(Activity, unrelated_activity.id)