# Pleroma: A lightweight social networking server # Copyright © 2017-2020 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.Pagination alias Pleroma.Plugs.EnsurePublicOrAuthenticatedPlug alias Pleroma.Plugs.OAuthScopesPlug alias Pleroma.Plugs.RateLimiter alias Pleroma.User alias Pleroma.Web.ActivityPub.ActivityPub 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.new(fn {key, value} -> {to_string(key), value} end) |> Map.put("type", ["Create", "Announce"]) |> Map.put("blocking_user", user) |> Map.put("muting_user", user) |> Map.put("reply_filtering_user", user) |> Map.put("user", user) recipients = [user.ap_id | User.following(user)] activities = recipients |> ActivityPub.fetch_activities(params) |> Enum.reverse() conn |> add_link_headers(activities) |> render("index.json", activities: activities, for: user, as: :activity ) end # GET /api/v1/timelines/direct def direct(%{assigns: %{user: user}} = conn, params) do params = params |> Map.new(fn {key, value} -> {to_string(key), value} end) |> 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 # GET /api/v1/timelines/public def public(%{assigns: %{user: user}} = conn, params) do params = Map.new(params, fn {key, value} -> {to_string(key), value} end) local_only = params["local"] cfg_key = if local_only do :local else :federated end restrict? = Pleroma.Config.get([:restrict_unauthenticated, :timelines, cfg_key]) if restrict? and is_nil(user) do render_error(conn, :unauthorized, "authorization required for timeline view") else activities = params |> Map.put("type", ["Create", "Announce"]) |> Map.put("local_only", local_only) |> Map.put("blocking_user", user) |> Map.put("muting_user", user) |> Map.put("reply_filtering_user", user) |> ActivityPub.fetch_public_activities() conn |> add_link_headers(activities, %{"local" => local_only}) |> render("index.json", activities: activities, for: user, as: :activity ) end end defp hashtag_fetching(params, user, local_only) do tags = [params["tag"], params["any"]] |> List.flatten() |> Enum.uniq() |> Enum.filter(& &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 params = Map.new(params, fn {key, value} -> {to_string(key), value} end) local_only = params["local"] activities = hashtag_fetching(params, user, local_only) conn |> add_link_headers(activities, %{"local" => local_only}) |> render("index.json", activities: activities, for: user, as: :activity ) 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.new(fn {key, value} -> {to_string(key), value} end) |> Map.put("type", "Create") |> Map.put("blocking_user", user) |> Map.put("user", user) |> Map.put("muting_user", user) # 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 ) else _e -> render_error(conn, :forbidden, "Error.") end end end