preload data into index.html

lib/pleroma/web/preload.ex

@@ -0,0 +1,30 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.Preload do
+  alias Phoenix.HTML
+  require Logger
+
+  def build_tags(_conn, params) do
+    preload_data =
+      Enum.reduce(Pleroma.Config.get([__MODULE__, :providers], []), %{}, fn parser, acc ->
+        Map.merge(acc, parser.generate_terms(params))
+      end)
+
+    rendered_html =
+      preload_data
+      |> Jason.encode!()
+      |> build_script_tag()
+      |> HTML.safe_to_string()
+
+    rendered_html
+  end
+
+  def build_script_tag(content) do
+    HTML.Tag.content_tag(:script, HTML.raw(content),
+      id: "initial-results",
+      type: "application/json"
+    )
+  end
+end