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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web do
   6   @moduledoc """
   7   A module that keeps using definitions for controllers,
   8   views and so on.
   9
  10   This can be used in your application as:
  11
  12       use Pleroma.Web, :controller
  13       use Pleroma.Web, :view
  14
  15   The definitions below will be executed for every view,
  16   controller, etc, so keep them short and clean, focused
  17   on imports, uses and aliases.
  18
  19   Do NOT define functions inside the quoted expressions
  20   below.
  21   """
  22
  23   def controller do
  24     quote do
  25       use Phoenix.Controller, namespace: Pleroma.Web
  26
  27       import Plug.Conn
  28       import Pleroma.Web.Gettext
  29       import Pleroma.Web.Router.Helpers
  30       import Pleroma.Web.TranslationHelpers
  31
  32       plug(:set_put_layout)
  33
  34       defp set_put_layout(conn, _) do
  35         put_layout(conn, Pleroma.Config.get(:app_layout, "app.html"))
  36       end
  37     end
  38   end
  39
  40   def view do
  41     quote do
  42       use Phoenix.View,
  43         root: "lib/pleroma/web/templates",
  44         namespace: Pleroma.Web
  45
  46       # Import convenience functions from controllers
  47       import Phoenix.Controller, only: [get_csrf_token: 0, get_flash: 2, view_module: 1]
  48
  49       import Pleroma.Web.ErrorHelpers
  50       import Pleroma.Web.Gettext
  51       import Pleroma.Web.Router.Helpers
  52
  53       require Logger
  54
  55       @doc "Same as `render/3` but wrapped in a rescue block"
  56       def safe_render(view, template, assigns \\ %{}) do
  57         Phoenix.View.render(view, template, assigns)
  58       rescue
  59         error ->
  60           Logger.error(
  61             "#{__MODULE__} failed to render #{inspect({view, template})}\n" <>
  62               Exception.format(:error, error, __STACKTRACE__)
  63           )
  64
  65           nil
  66       end
  67
  68       @doc """
  69       Same as `render_many/4` but wrapped in rescue block.
  70       """
  71       def safe_render_many(collection, view, template, assigns \\ %{}) do
  72         Enum.map(collection, fn resource ->
  73           as = Map.get(assigns, :as) || view.__resource__
  74           assigns = Map.put(assigns, as, resource)
  75           safe_render(view, template, assigns)
  76         end)
  77         |> Enum.filter(& &1)
  78       end
  79     end
  80   end
  81
  82   def router do
  83     quote do
  84       use Phoenix.Router
  85       # credo:disable-for-next-line Credo.Check.Consistency.MultiAliasImportRequireUse
  86       import Plug.Conn
  87       import Phoenix.Controller
  88     end
  89   end
  90
  91   def channel do
  92     quote do
  93       # credo:disable-for-next-line Credo.Check.Consistency.MultiAliasImportRequireUse
  94       use Phoenix.Channel
  95       import Pleroma.Web.Gettext
  96     end
  97   end
  98
  99   @doc """
 100   When used, dispatch to the appropriate controller/view/etc.
 101   """
 102   defmacro __using__(which) when is_atom(which) do
 103     apply(__MODULE__, which, [])
 104   end
 105
 106   def base_url do
 107     Pleroma.Web.Endpoint.url()
 108   end
 109 end