Use compile with opts for post queries

lib/philomena/posts/query.ex

@@ -90,7 +90,8 @@ defmodule Philomena.Posts.Query do
     |> Parser.parse(query_string, context)
   end
 
-  def compile(user, query_string) do
+  def compile(query_string, opts \\ []) do
+    user = Keyword.get(opts, :user)
     query_string = query_string || ""
 
     case user do

lib/philomena_web/controllers/api/json/search/post_controller.ex

@@ -9,7 +9,7 @@ defmodule PhilomenaWeb.Api.Json.Search.PostController do
   def index(conn, params) do
     user = conn.assigns.current_user
 
-    case Query.compile(user, params["q"] || "") do
+    case Query.compile(params["q"], user: user) do
       {:ok, query} ->
         posts =
           Post

lib/philomena_web/controllers/post_controller.ex

@@ -13,8 +13,8 @@ defmodule PhilomenaWeb.PostController do
     conn = Map.put(conn, :params, params)
     user = conn.assigns.current_user
 
-    user
-    |> Query.compile(pq)
+    pq
+    |> Query.compile(user: user)
     |> render_index(conn, user)
   end