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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.MastodonAPI.MastodonAPI do
   6   import Ecto.Query
   7   import Ecto.Changeset
   8
   9   alias Pleroma.Activity
  10   alias Pleroma.Notification
  11   alias Pleroma.Pagination
  12   alias Pleroma.ScheduledActivity
  13   alias Pleroma.User
  14   alias Pleroma.Web.CommonAPI
  15
  16   def follow(follower, followed, params \\ %{}) do
  17     options = cast_params(params)
  18     reblogs = options[:reblogs]
  19
  20     result =
  21       if not User.following?(follower, followed) do
  22         CommonAPI.follow(follower, followed)
  23       else
  24         {:ok, follower, followed, nil}
  25       end
  26
  27     with {:ok, follower, followed, _} <- result do
  28       reblogs
  29       |> case do
  30         false -> CommonAPI.hide_reblogs(follower, followed)
  31         _ -> CommonAPI.show_reblogs(follower, followed)
  32       end
  33       |> case do
  34         {:ok, follower} -> {:ok, follower}
  35         _ -> {:ok, follower}
  36       end
  37     end
  38   end
  39
  40   def get_followers(user, params \\ %{}) do
  41     user
  42     |> User.get_followers_query()
  43     |> Pagination.fetch_paginated(params)
  44   end
  45
  46   def get_friends(user, params \\ %{}) do
  47     user
  48     |> User.get_friends_query()
  49     |> Pagination.fetch_paginated(params)
  50   end
  51
  52   def get_notifications(user, params \\ %{}) do
  53     options = cast_params(params)
  54
  55     user
  56     |> Notification.for_user_query()
  57     |> restrict(:exclude_types, options)
  58     |> Pagination.fetch_paginated(params)
  59   end
  60
  61   def get_scheduled_activities(user, params \\ %{}) do
  62     user
  63     |> ScheduledActivity.for_user_query()
  64     |> Pagination.fetch_paginated(params)
  65   end
  66
  67   defp cast_params(params) do
  68     param_types = %{
  69       exclude_types: {:array, :string},
  70       reblogs: :boolean
  71     }
  72
  73     changeset = cast({%{}, param_types}, params, Map.keys(param_types))
  74     changeset.changes
  75   end
  76
  77   defp restrict(query, :exclude_types, %{exclude_types: mastodon_types = [_ | _]}) do
  78     ap_types =
  79       mastodon_types
  80       |> Enum.map(&Activity.from_mastodon_notification_type/1)
  81       |> Enum.filter(& &1)
  82
  83     query
  84     |> where([q, a], not fragment("? @> ARRAY[?->>'type']::varchar[]", ^ap_types, a.data))
  85   end
  86
  87   defp restrict(query, _, _), do: query
  88 end