# 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.TimelineController do use Pleroma.Web, :controller import Pleroma.Web.ControllerHelper, only: [add_link_headers: 2, add_link_headers: 3] alias Pleroma.Config alias Pleroma.Pagination alias Pleroma.User alias Pleroma.Web.ActivityPub.ActivityPub alias Pleroma.Web.Plugs.EnsurePublicOrAuthenticatedPlug alias Pleroma.Web.Plugs.OAuthScopesPlug alias Pleroma.Web.Plugs.RateLimiter plug(Pleroma.Web.ApiSpec.CastAndValidate) plug(:skip_plug, EnsurePublicOrAuthenticatedPlug when action in [:public, :hashtag]) # TODO: Replace with a macro when there is a Phoenix release with the following commit in it: # https://github.com/phoenixframework/phoenix/commit/2e8c63c01fec4dde5467dbbbf9705ff9e780735e plug(RateLimiter, [name: :timeline, bucket_name: :direct_timeline] when action == :direct) plug(RateLimiter, [name: :timeline, bucket_name: :public_timeline] when action == :public) plug(RateLimiter, [name: :timeline, bucket_name: :home_timeline] when action == :home) plug(RateLimiter, [name: :timeline, bucket_name: :hashtag_timeline] when action == :hashtag) plug(RateLimiter, [name: :timeline, bucket_name: :list_timeline] when action == :list) plug(OAuthScopesPlug, %{scopes: ["read:statuses"]} when action in [:home, :direct]) plug(OAuthScopesPlug, %{scopes: ["read:lists"]} when action == :list) plug( OAuthScopesPlug, %{scopes: ["read:statuses"], fallback: :proceed_unauthenticated} when action in [:public, :hashtag] ) plug(:put_view, Pleroma.Web.MastodonAPI.StatusView) defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.TimelineOperation # GET /api/v1/timelines/home def home(%{assigns: %{user: user}} = conn, params) do params = params |> Map.put(:type, ["Create", "Announce"]) |> Map.put(:blocking_user, user) |> Map.put(:muting_user, user) |> Map.put(:reply_filtering_user, user) |> Map.put(:announce_filtering_user, user) |> Map.put(:user, user) |> Map.put(:local_only, params[:local]) |> Map.delete(:local) activities = [user.ap_id | User.following(user)] |> ActivityPub.fetch_activities(params) |> Enum.reverse() conn |> add_link_headers(activities) |> render("index.json", activities: activities, for: user, as: :activity, with_muted: Map.get(params, :with_muted, false) ) end # GET /api/v1/timelines/direct def direct(%{assigns: %{user: user}} = conn, params) do params = params |> Map.put(:type, "Create") |> Map.put(:blocking_user, user) |> Map.put(:user, user) |> Map.put(:visibility, "direct") activities = [user.ap_id] |> ActivityPub.fetch_activities_query(params) |> Pagination.fetch_paginated(params) conn |> add_link_headers(activities) |> render("index.json", activities: activities, for: user, as: :activity ) end defp restrict_unauthenticated?(true = _local_only) do Config.restrict_unauthenticated_access?(:timelines, :local) end defp restrict_unauthenticated?(_) do Config.restrict_unauthenticated_access?(:timelines, :federated) end # GET /api/v1/timelines/public def public(%{assigns: %{user: user}} = conn, params) do local_only = params[:local] if is_nil(user) and restrict_unauthenticated?(local_only) do fail_on_bad_auth(conn) else activities = params |> Map.put(:type, ["Create"]) |> Map.put(:local_only, local_only) |> Map.put(:blocking_user, user) |> Map.put(:muting_user, user) |> Map.put(:reply_filtering_user, user) |> Map.put(:instance, params[:instance]) |> ActivityPub.fetch_public_activities() conn |> add_link_headers(activities, %{"local" => local_only}) |> render("index.json", activities: activities, for: user, as: :activity, with_muted: Map.get(params, :with_muted, false) ) end end defp fail_on_bad_auth(conn) do render_error(conn, :unauthorized, "authorization required for timeline view") end defp hashtag_fetching(params, user, local_only) do tags = [params[:tag], params[:any]] |> List.flatten() |> Enum.uniq() |> Enum.reject(&is_nil/1) |> Enum.map(&String.downcase/1) tag_all = params |> Map.get(:all, []) |> Enum.map(&String.downcase/1) tag_reject = params |> Map.get(:none, []) |> Enum.map(&String.downcase/1) _activities = params |> Map.put(:type, "Create") |> Map.put(:local_only, local_only) |> Map.put(:blocking_user, user) |> Map.put(:muting_user, user) |> Map.put(:user, user) |> Map.put(:tag, tags) |> Map.put(:tag_all, tag_all) |> Map.put(:tag_reject, tag_reject) |> ActivityPub.fetch_public_activities() end # GET /api/v1/timelines/tag/:tag def hashtag(%{assigns: %{user: user}} = conn, params) do local_only = params[:local] if is_nil(user) and restrict_unauthenticated?(local_only) do fail_on_bad_auth(conn) else activities = hashtag_fetching(params, user, local_only) conn |> add_link_headers(activities, %{"local" => local_only}) |> render("index.json", activities: activities, for: user, as: :activity, with_muted: Map.get(params, :with_muted, false) ) end end # GET /api/v1/timelines/list/:list_id def list(%{assigns: %{user: user}} = conn, %{list_id: id} = params) do with %Pleroma.List{title: _title, following: following} <- Pleroma.List.get(id, user) do params = params |> Map.put(:type, "Create") |> Map.put(:blocking_user, user) |> Map.put(:user, user) |> Map.put(:muting_user, user) |> Map.put(:local_only, params[:local]) # we must filter the following list for the user to avoid leaking statuses the user # does not actually have permission to see (for more info, peruse security issue #270). user_following = User.following(user) activities = following |> Enum.filter(fn x -> x in user_following end) |> ActivityPub.fetch_activities_bounded(following, params) |> Enum.reverse() render(conn, "index.json", activities: activities, for: user, as: :activity, with_muted: Map.get(params, :with_muted, false) ) else _e -> render_error(conn, :forbidden, "Error.") end end end