git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/activity_pub.ex

   1 defmodule Pleroma.Web.ActivityPub.ActivityPub do
   2   alias Pleroma.{Activity, Repo, Object, Upload, User, Notification}
   3   alias Pleroma.Web.ActivityPub.Transmogrifier
   4   alias Pleroma.Web.WebFinger
   5   alias Pleroma.Web.Federator
   6   alias Pleroma.Web.OStatus
   7   import Ecto.Query
   8   import Pleroma.Web.ActivityPub.Utils
   9   require Logger
  10
  11   @httpoison Application.get_env(:pleroma, :httpoison)
  12
  13   def get_recipients(data) do
  14     (data["to"] || []) ++ (data["cc"] || [])
  15   end
  16
  17   def insert(map, local \\ true) when is_map(map) do
  18     with nil <- Activity.get_by_ap_id(map["id"]),
  19          map <- lazy_put_activity_defaults(map),
  20          :ok <- insert_full_object(map) do
  21       {:ok, activity} =
  22         Repo.insert(%Activity{
  23           data: map,
  24           local: local,
  25           actor: map["actor"],
  26           recipients: get_recipients(map)
  27         })
  28
  29       Notification.create_notifications(activity)
  30       stream_out(activity)
  31       {:ok, activity}
  32     else
  33       %Activity{} = activity -> {:ok, activity}
  34       error -> {:error, error}
  35     end
  36   end
  37
  38   def stream_out(activity) do
  39     if activity.data["type"] in ["Create", "Announce"] do
  40       Pleroma.Web.Streamer.stream("user", activity)
  41
  42       if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") do
  43         Pleroma.Web.Streamer.stream("public", activity)
  44
  45         if activity.local do
  46           Pleroma.Web.Streamer.stream("public:local", activity)
  47         end
  48       end
  49     end
  50   end
  51
  52   def create(%{to: to, actor: actor, context: context, object: object} = params) do
  53     additional = params[:additional] || %{}
  54     # only accept false as false value
  55     local = !(params[:local] == false)
  56     published = params[:published]
  57
  58     with create_data <-
  59            make_create_data(
  60              %{to: to, actor: actor, published: published, context: context, object: object},
  61              additional
  62            ),
  63          {:ok, activity} <- insert(create_data, local),
  64          :ok <- maybe_federate(activity) do
  65       {:ok, activity}
  66     end
  67   end
  68
  69   def accept(%{to: to, actor: actor, object: object} = params) do
  70     # only accept false as false value
  71     local = !(params[:local] == false)
  72
  73     with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
  74          {:ok, activity} <- insert(data, local),
  75          :ok <- maybe_federate(activity) do
  76       {:ok, activity}
  77     end
  78   end
  79
  80   def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
  81     # only accept false as false value
  82     local = !(params[:local] == false)
  83
  84     with data <- %{
  85            "to" => to,
  86            "cc" => cc,
  87            "type" => "Update",
  88            "actor" => actor,
  89            "object" => object
  90          },
  91          {:ok, activity} <- insert(data, local),
  92          :ok <- maybe_federate(activity) do
  93       {:ok, activity}
  94     end
  95   end
  96
  97   # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
  98   def like(
  99         %User{ap_id: ap_id} = user,
 100         %Object{data: %{"id" => _}} = object,
 101         activity_id \\ nil,
 102         local \\ true
 103       ) do
 104     with nil <- get_existing_like(ap_id, object),
 105          like_data <- make_like_data(user, object, activity_id),
 106          {:ok, activity} <- insert(like_data, local),
 107          {:ok, object} <- add_like_to_object(activity, object),
 108          :ok <- maybe_federate(activity) do
 109       {:ok, activity, object}
 110     else
 111       %Activity{} = activity -> {:ok, activity, object}
 112       error -> {:error, error}
 113     end
 114   end
 115
 116   def unlike(%User{} = actor, %Object{} = object) do
 117     with %Activity{} = activity <- get_existing_like(actor.ap_id, object),
 118          {:ok, _activity} <- Repo.delete(activity),
 119          {:ok, object} <- remove_like_from_object(activity, object) do
 120       {:ok, object}
 121     else
 122       _e -> {:ok, object}
 123     end
 124   end
 125
 126   def announce(
 127         %User{ap_id: _} = user,
 128         %Object{data: %{"id" => _}} = object,
 129         activity_id \\ nil,
 130         local \\ true
 131       ) do
 132     with true <- is_public?(object),
 133          announce_data <- make_announce_data(user, object, activity_id),
 134          {:ok, activity} <- insert(announce_data, local),
 135          {:ok, object} <- add_announce_to_object(activity, object),
 136          :ok <- maybe_federate(activity) do
 137       {:ok, activity, object}
 138     else
 139       error -> {:error, error}
 140     end
 141   end
 142
 143   def unannounce(
 144         %User{} = actor,
 145         %Object{} = object,
 146         local \\ true,
 147         activity_id \\ nil
 148       ) do
 149     with %Activity{} = activity <- get_existing_announce(actor.ap_id, object),
 150          unannounce_data <- make_unannounce_data(actor, activity, activity_id),
 151          {:ok, unannounce_activity} <- insert(unannounce_data, local),
 152          :ok <- maybe_federate(activity),
 153          {:ok, _activity} <- Repo.delete(activity),
 154          {:ok, object} <- remove_announce_from_object(activity, object) do
 155       {:ok, unannounce_activity, activity, object}
 156     else
 157       _e -> {:ok, object}
 158     end
 159   end
 160
 161   def follow(follower, followed, activity_id \\ nil, local \\ true) do
 162     with data <- make_follow_data(follower, followed, activity_id),
 163          {:ok, activity} <- insert(data, local),
 164          :ok <- maybe_federate(activity) do
 165       {:ok, activity}
 166     end
 167   end
 168
 169   def unfollow(follower, followed, local \\ true) do
 170     with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
 171          unfollow_data <- make_unfollow_data(follower, followed, follow_activity),
 172          {:ok, activity} <- insert(unfollow_data, local),
 173          :ok,
 174          maybe_federate(activity) do
 175       {:ok, activity}
 176     end
 177   end
 178
 179   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
 180     user = User.get_cached_by_ap_id(actor)
 181
 182     data = %{
 183       "type" => "Delete",
 184       "actor" => actor,
 185       "object" => id,
 186       "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
 187     }
 188
 189     with Repo.delete(object),
 190          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
 191          {:ok, activity} <- insert(data, local),
 192          :ok <- maybe_federate(activity) do
 193       {:ok, activity}
 194     end
 195   end
 196
 197   def fetch_activities_for_context(context, opts \\ %{}) do
 198     public = ["https://www.w3.org/ns/activitystreams#Public"]
 199
 200     recipients =
 201       if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
 202
 203     query = from(activity in Activity)
 204
 205     query =
 206       query
 207       |> restrict_blocked(opts)
 208       |> restrict_recipients(recipients, opts["user"])
 209
 210     query =
 211       from(
 212         activity in query,
 213         where:
 214           fragment(
 215             "?->>'type' = ? and ?->>'context' = ?",
 216             activity.data,
 217             "Create",
 218             activity.data,
 219             ^context
 220           ),
 221         order_by: [desc: :id]
 222       )
 223
 224     Repo.all(query)
 225   end
 226
 227   # TODO: Make this work properly with unlisted.
 228   def fetch_public_activities(opts \\ %{}) do
 229     q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
 230
 231     q
 232     |> Repo.all()
 233     |> Enum.reverse()
 234   end
 235
 236   defp restrict_since(query, %{"since_id" => since_id}) do
 237     from(activity in query, where: activity.id > ^since_id)
 238   end
 239
 240   defp restrict_since(query, _), do: query
 241
 242   defp restrict_tag(query, %{"tag" => tag}) do
 243     from(
 244       activity in query,
 245       where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
 246     )
 247   end
 248
 249   defp restrict_tag(query, _), do: query
 250
 251   defp restrict_recipients(query, [], user), do: query
 252
 253   defp restrict_recipients(query, recipients, nil) do
 254     from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
 255   end
 256
 257   defp restrict_recipients(query, recipients, user) do
 258     from(
 259       activity in query,
 260       where: fragment("? && ?", ^recipients, activity.recipients),
 261       or_where: activity.actor == ^user.ap_id
 262     )
 263   end
 264
 265   defp restrict_limit(query, %{"limit" => limit}) do
 266     from(activity in query, limit: ^limit)
 267   end
 268
 269   defp restrict_limit(query, _), do: query
 270
 271   defp restrict_local(query, %{"local_only" => true}) do
 272     from(activity in query, where: activity.local == true)
 273   end
 274
 275   defp restrict_local(query, _), do: query
 276
 277   defp restrict_max(query, %{"max_id" => max_id}) do
 278     from(activity in query, where: activity.id < ^max_id)
 279   end
 280
 281   defp restrict_max(query, _), do: query
 282
 283   defp restrict_actor(query, %{"actor_id" => actor_id}) do
 284     from(activity in query, where: activity.actor == ^actor_id)
 285   end
 286
 287   defp restrict_actor(query, _), do: query
 288
 289   defp restrict_type(query, %{"type" => type}) when is_binary(type) do
 290     restrict_type(query, %{"type" => [type]})
 291   end
 292
 293   defp restrict_type(query, %{"type" => type}) do
 294     from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
 295   end
 296
 297   defp restrict_type(query, _), do: query
 298
 299   defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
 300     from(
 301       activity in query,
 302       where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
 303     )
 304   end
 305
 306   defp restrict_favorited_by(query, _), do: query
 307
 308   defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
 309     from(
 310       activity in query,
 311       where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
 312     )
 313   end
 314
 315   defp restrict_media(query, _), do: query
 316
 317   # Only search through last 100_000 activities by default
 318   defp restrict_recent(query, %{"whole_db" => true}), do: query
 319
 320   defp restrict_recent(query, _) do
 321     since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
 322
 323     from(activity in query, where: activity.id > ^since)
 324   end
 325
 326   defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
 327     blocks = info["blocks"] || []
 328     from(activity in query, where: fragment("not (? = ANY(?))", activity.actor, ^blocks))
 329   end
 330
 331   defp restrict_blocked(query, _), do: query
 332
 333   def fetch_activities_query(recipients, opts \\ %{}) do
 334     base_query =
 335       from(
 336         activity in Activity,
 337         limit: 20,
 338         order_by: [fragment("? desc nulls last", activity.id)]
 339       )
 340
 341     base_query
 342     |> restrict_recipients(recipients, opts["user"])
 343     |> restrict_tag(opts)
 344     |> restrict_since(opts)
 345     |> restrict_local(opts)
 346     |> restrict_limit(opts)
 347     |> restrict_max(opts)
 348     |> restrict_actor(opts)
 349     |> restrict_type(opts)
 350     |> restrict_favorited_by(opts)
 351     |> restrict_recent(opts)
 352     |> restrict_blocked(opts)
 353     |> restrict_media(opts)
 354   end
 355
 356   def fetch_activities(recipients, opts \\ %{}) do
 357     fetch_activities_query(recipients, opts)
 358     |> Repo.all()
 359     |> Enum.reverse()
 360   end
 361
 362   def upload(file) do
 363     data = Upload.store(file)
 364     Repo.insert(%Object{data: data})
 365   end
 366
 367   def user_data_from_user_object(data) do
 368     avatar =
 369       data["icon"]["url"] &&
 370         %{
 371           "type" => "Image",
 372           "url" => [%{"href" => data["icon"]["url"]}]
 373         }
 374
 375     banner =
 376       data["image"]["url"] &&
 377         %{
 378           "type" => "Image",
 379           "url" => [%{"href" => data["image"]["url"]}]
 380         }
 381
 382     user_data = %{
 383       ap_id: data["id"],
 384       info: %{
 385         "ap_enabled" => true,
 386         "source_data" => data,
 387         "banner" => banner
 388       },
 389       avatar: avatar,
 390       nickname: "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}",
 391       name: data["name"],
 392       follower_address: data["followers"],
 393       bio: data["summary"]
 394     }
 395
 396     {:ok, user_data}
 397   end
 398
 399   def fetch_and_prepare_user_from_ap_id(ap_id) do
 400     with {:ok, %{status_code: 200, body: body}} <-
 401            @httpoison.get(ap_id, Accept: "application/activity+json"),
 402          {:ok, data} <- Jason.decode(body) do
 403       user_data_from_user_object(data)
 404     else
 405       e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
 406     end
 407   end
 408
 409   def make_user_from_ap_id(ap_id) do
 410     if user = User.get_by_ap_id(ap_id) do
 411       Transmogrifier.upgrade_user_from_ap_id(ap_id)
 412     else
 413       with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
 414         User.insert_or_update_user(data)
 415       else
 416         e -> {:error, e}
 417       end
 418     end
 419   end
 420
 421   def make_user_from_nickname(nickname) do
 422     with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
 423       make_user_from_ap_id(ap_id)
 424     else
 425       _e -> {:error, "No AP id in WebFinger"}
 426     end
 427   end
 428
 429   def publish(actor, activity) do
 430     followers =
 431       if actor.follower_address in activity.recipients do
 432         {:ok, followers} = User.get_followers(actor)
 433         followers |> Enum.filter(&(!&1.local))
 434       else
 435         []
 436       end
 437
 438     remote_inboxes =
 439       (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
 440       |> Enum.filter(fn user -> User.ap_enabled?(user) end)
 441       |> Enum.map(fn %{info: %{"source_data" => data}} ->
 442         (data["endpoints"] && data["endpoints"]["sharedInbox"]) || data["inbox"]
 443       end)
 444       |> Enum.uniq()
 445
 446     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 447     json = Jason.encode!(data)
 448
 449     Enum.each(remote_inboxes, fn inbox ->
 450       Federator.enqueue(:publish_single_ap, %{
 451         inbox: inbox,
 452         json: json,
 453         actor: actor,
 454         id: activity.data["id"]
 455       })
 456     end)
 457   end
 458
 459   def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
 460     Logger.info("Federating #{id} to #{inbox}")
 461     host = URI.parse(inbox).host
 462
 463     signature =
 464       Pleroma.Web.HTTPSignatures.sign(actor, %{host: host, "content-length": byte_size(json)})
 465
 466     @httpoison.post(
 467       inbox,
 468       json,
 469       [{"Content-Type", "application/activity+json"}, {"signature", signature}],
 470       hackney: [pool: :default]
 471     )
 472   end
 473
 474   # TODO:
 475   # This will create a Create activity, which we need internally at the moment.
 476   def fetch_object_from_id(id) do
 477     if object = Object.get_cached_by_ap_id(id) do
 478       {:ok, object}
 479     else
 480       Logger.info("Fetching #{id} via AP")
 481
 482       with true <- String.starts_with?(id, "http"),
 483            {:ok, %{body: body, status_code: code}} when code in 200..299 <-
 484              @httpoison.get(
 485                id,
 486                [Accept: "application/activity+json"],
 487                follow_redirect: true,
 488                timeout: 10000,
 489                recv_timeout: 20000
 490              ),
 491            {:ok, data} <- Jason.decode(body),
 492            nil <- Object.get_by_ap_id(data["id"]),
 493            params <- %{
 494              "type" => "Create",
 495              "to" => data["to"],
 496              "cc" => data["cc"],
 497              "actor" => data["attributedTo"],
 498              "object" => data
 499            },
 500            {:ok, activity} <- Transmogrifier.handle_incoming(params) do
 501         {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
 502       else
 503         object = %Object{} ->
 504           {:ok, object}
 505
 506         e ->
 507           Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
 508
 509           case OStatus.fetch_activity_from_url(id) do
 510             {:ok, [activity | _]} -> {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
 511             e -> e
 512           end
 513       end
 514     end
 515   end
 516
 517   def is_public?(activity) do
 518     "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
 519                                                          (activity.data["cc"] || []))
 520   end
 521
 522   def visible_for_user?(activity, nil) do
 523     is_public?(activity)
 524   end
 525
 526   def visible_for_user?(activity, user) do
 527     x = [user.ap_id | user.following]
 528     y = activity.data["to"] ++ (activity.data["cc"] || [])
 529     visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
 530   end
 531 end