+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.MastodonAPI do
+ import Ecto.Query
+ import Ecto.Changeset
+
+ alias Pleroma.Notification
+ alias Pleroma.Pagination
+ alias Pleroma.ScheduledActivity
+ alias Pleroma.User
+ alias Pleroma.Web.CommonAPI
+
+ @spec follow(User.t(), User.t(), map) :: {:ok, User.t()} | {:error, String.t()}
+ def follow(follower, followed, params \\ %{}) do
+ result =
+ if not User.following?(follower, followed) do
+ CommonAPI.follow(follower, followed)
+ else
+ {:ok, follower, followed, nil}
+ end
+
+ with {:ok, follower, _followed, _} <- result do
+ options = cast_params(params)
+ set_reblogs_visibility(options[:reblogs], result)
+ set_subscription(options[:notify], result)
+ {:ok, follower}
+ end
+ end
+
+ defp set_reblogs_visibility(false, {:ok, follower, followed, _}) do
+ CommonAPI.hide_reblogs(follower, followed)
+ end
+
+ defp set_reblogs_visibility(_, {:ok, follower, followed, _}) do
+ CommonAPI.show_reblogs(follower, followed)
+ end
+
+ defp set_subscription(true, {:ok, follower, followed, _}) do
+ User.subscribe(follower, followed)
+ end
+
+ defp set_subscription(false, {:ok, follower, followed, _}) do
+ User.unsubscribe(follower, followed)
+ end
+
+ defp set_subscription(_, _), do: {:ok, nil}
+
+ @spec get_followers(User.t(), map()) :: list(User.t())
+ def get_followers(user, params \\ %{}) do
+ user
+ |> User.get_followers_query()
+ |> Pagination.fetch_paginated(params)
+ end
+
+ def get_friends(user, params \\ %{}) do
+ user
+ |> User.get_friends_query()
+ |> Pagination.fetch_paginated(params)
+ end
+
+ def get_notifications(user, params \\ %{}) do
+ options = cast_params(params)
+
+ user
+ |> Notification.for_user_query(options)
+ |> restrict(:include_types, options)
+ |> restrict(:exclude_types, options)
+ |> restrict(:account_ap_id, options)
+ |> Pagination.fetch_paginated(params)
+ end
+
+ def get_scheduled_activities(user, params \\ %{}) do
+ user
+ |> ScheduledActivity.for_user_query()
+ |> Pagination.fetch_paginated(params)
+ end
+
+ defp cast_params(params) do
+ param_types = %{
+ exclude_types: {:array, :string},
+ include_types: {:array, :string},
+ exclude_visibilities: {:array, :string},
+ reblogs: :boolean,
+ with_muted: :boolean,
+ account_ap_id: :string,
+ notify: :boolean
+ }
+
+ changeset = cast({%{}, param_types}, params, Map.keys(param_types))
+ changeset.changes
+ end
+
+ defp restrict(query, :include_types, %{include_types: mastodon_types = [_ | _]}) do
+ where(query, [n], n.type in ^mastodon_types)
+ end
+
+ defp restrict(query, :exclude_types, %{exclude_types: mastodon_types = [_ | _]}) do
+ where(query, [n], n.type not in ^mastodon_types)
+ end
+
+ defp restrict(query, :account_ap_id, %{account_ap_id: account_ap_id}) do
+ where(query, [n, a], a.actor == ^account_ap_id)
+ end
+
+ defp restrict(query, _, _), do: query
+end