MastoAPI: add domain blocking.

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -780,6 +780,46 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
     assert [%{"id" => ^other_user_id}] = json_response(conn, 200)
   end
 
+  test "blocking / unblocking a domain", %{conn: conn} do
+    user = insert(:user)
+    other_user = insert(:user, %{ap_id: "https://dogwhistle.zone/@pundit"})
+
+    conn =
+      conn
+      |> assign(:user, user)
+      |> post("/api/v1/domain_blocks", %{"domain" => "dogwhistle.zone"})
+
+    assert %{} = json_response(conn, 200)
+    user = User.get_cached_by_ap_id(user.ap_id)
+    assert User.blocks?(user, other_user)
+
+    conn =
+      build_conn()
+      |> assign(:user, user)
+      |> delete("/api/v1/domain_blocks", %{"domain" => "dogwhistle.zone"})
+
+    assert %{} = json_response(conn, 200)
+    user = User.get_cached_by_ap_id(user.ap_id)
+    refute User.blocks?(user, other_user)
+  end
+
+  test "getting a list of domain blocks" do
+    user = insert(:user)
+
+    {:ok, user} = User.block_domain(user, "bad.site")
+    {:ok, user} = User.block_domain(user, "even.worse.site")
+
+    conn =
+      conn
+      |> assign(:user, user)
+      |> get("/api/v1/domain_blocks")
+
+    domain_blocks = json_response(conn, 200)
+
+    assert "bad.site" in domain_blocks
+    assert "even.worse.site" in domain_blocks
+  end
+
   test "unimplemented mute endpoints" do
     user = insert(:user)
     other_user = insert(:user)