chore: add fallback controller handlers

lib/logflare_web/controllers/api/fallback_controller.ex

@@ -22,4 +22,14 @@ defmodule LogflareWeb.Api.FallbackController do
     |> put_status(:not_found)
     |> json(%{error: "Not Found"})
   end
+
+  def call(conn, {:error, msg}) when is_atom(msg) do
+    call(conn, {:error, Atom.to_string(msg)})
+  end
+
+  def call(conn, {:error, msg}) when is_binary(msg) do
+    conn
+    |> put_status(400)
+    |> json(%{error: msg})
+  end
 end

lib/logflare_web/controllers/api/query_controller.ex

@@ -28,4 +28,8 @@ defmodule LogflareWeb.Api.QueryController do
       json(conn, %{result: rows})
     end
   end
+
+  def query(_conn, _params) do
+    {:error, "No query params provided. Supported query params are sql=, bq_sql=, and pg_sql="}
+  end
 end

test/logflare_web/controllers/api/query_controller_test.exs

@@ -9,6 +9,14 @@ defmodule LogflareWeb.Api.QueryControllerTest do
     {:ok, user: user}
   end
 
+
+  test "no query param provided", %{conn: conn, user: user} do
+    conn
+    |> add_access_token(user, ~w(private))
+    |> get(~p"/api/query")
+    |> json_response(400)
+  end
+
   describe "query with bq" do
     setup do
       stub(Goth, :fetch, fn _mod -> {:ok, %Goth.Token{token: "auth-token"}} end)