# Pleroma: A lightweight social networking server # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Emoji do @moduledoc """ This GenServer stores in an ETS table the list of the loaded emojis, and also allows to reload the list at runtime. """ use GenServer alias Pleroma.Emoji.Loader require Logger @ets __MODULE__.Ets @ets_options [ :ordered_set, :protected, :named_table, {:read_concurrency, true} ] defstruct [:code, :file, :tags, :safe_code, :safe_file] @doc "Build emoji struct" def build({code, file, tags}) do %__MODULE__{ code: code, file: file, tags: tags, safe_code: Pleroma.HTML.strip_tags(code), safe_file: Pleroma.HTML.strip_tags(file) } end def build({code, file}), do: build({code, file, []}) @doc false def start_link(_) do GenServer.start_link(__MODULE__, [], name: __MODULE__) end @doc "Reloads the emojis from disk." @spec reload() :: :ok def reload do GenServer.call(__MODULE__, :reload) end @doc "Returns the path of the emoji `name`." @spec get(String.t()) :: String.t() | nil def get(name) do case :ets.lookup(@ets, name) do [{_, path}] -> path _ -> nil end end @doc "Returns all the emojos!!" @spec get_all() :: list({String.t(), String.t(), String.t()}) def get_all do :ets.tab2list(@ets) end @doc "Clear out old emojis" def clear_all, do: :ets.delete_all_objects(@ets) @doc false def init(_) do @ets = :ets.new(@ets, @ets_options) GenServer.cast(self(), :reload) {:ok, nil} end @doc false def handle_cast(:reload, state) do update_emojis(Loader.load()) {:noreply, state} end @doc false def handle_call(:reload, _from, state) do update_emojis(Loader.load()) {:reply, :ok, state} end @doc false def terminate(_, _) do :ok end @doc false def code_change(_old_vsn, state, _extra) do update_emojis(Loader.load()) {:ok, state} end defp update_emojis(emojis) do :ets.insert(@ets, emojis) end end