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, MRF}
   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   @instance Application.get_env(:pleroma, :instance)
  14
  15   def get_recipients(data) do
  16     (data["to"] || []) ++ (data["cc"] || [])
  17   end
  18
  19   defp check_actor_is_active(actor) do
  20     if not is_nil(actor) do
  21       with user <- User.get_cached_by_ap_id(actor),
  22            nil <- user.info["deactivated"] do
  23         :ok
  24       else
  25         _e -> :reject
  26       end
  27     else
  28       :ok
  29     end
  30   end
  31
  32   def insert(map, local \\ true) when is_map(map) do
  33     with nil <- Activity.get_by_ap_id(map["id"]),
  34          map <- lazy_put_activity_defaults(map),
  35          :ok <- check_actor_is_active(map["actor"]),
  36          {:ok, map} <- MRF.filter(map),
  37          :ok <- insert_full_object(map) do
  38       {:ok, activity} =
  39         Repo.insert(%Activity{
  40           data: map,
  41           local: local,
  42           actor: map["actor"],
  43           recipients: get_recipients(map)
  44         })
  45
  46       Notification.create_notifications(activity)
  47       stream_out(activity)
  48       {:ok, activity}
  49     else
  50       %Activity{} = activity -> {:ok, activity}
  51       error -> {:error, error}
  52     end
  53   end
  54
  55   def stream_out(activity) do
  56     if activity.data["type"] in ["Create", "Announce"] do
  57       Pleroma.Web.Streamer.stream("user", activity)
  58
  59       if Enum.member?(activity.data["to"], "https://www.w3.org/ns/activitystreams#Public") do
  60         Pleroma.Web.Streamer.stream("public", activity)
  61
  62         if activity.local do
  63           Pleroma.Web.Streamer.stream("public:local", activity)
  64         end
  65       end
  66     end
  67   end
  68
  69   def create(%{to: to, actor: actor, context: context, object: object} = params) do
  70     additional = params[:additional] || %{}
  71     # only accept false as false value
  72     local = !(params[:local] == false)
  73     published = params[:published]
  74
  75     with create_data <-
  76            make_create_data(
  77              %{to: to, actor: actor, published: published, context: context, object: object},
  78              additional
  79            ),
  80          {:ok, activity} <- insert(create_data, local),
  81          :ok <- maybe_federate(activity),
  82          {:ok, _actor} <- User.increase_note_count(actor) do
  83       {:ok, activity}
  84     end
  85   end
  86
  87   def accept(%{to: to, actor: actor, object: object} = params) do
  88     # only accept false as false value
  89     local = !(params[:local] == false)
  90
  91     with data <- %{"to" => to, "type" => "Accept", "actor" => actor, "object" => object},
  92          {:ok, activity} <- insert(data, local),
  93          :ok <- maybe_federate(activity) do
  94       {:ok, activity}
  95     end
  96   end
  97
  98   def reject(%{to: to, actor: actor, object: object} = params) do
  99     # only accept false as false value
 100     local = !(params[:local] == false)
 101
 102     with data <- %{"to" => to, "type" => "Reject", "actor" => actor, "object" => object},
 103          {:ok, activity} <- insert(data, local),
 104          :ok <- maybe_federate(activity) do
 105       {:ok, activity}
 106     end
 107   end
 108
 109   def update(%{to: to, cc: cc, actor: actor, object: object} = params) do
 110     # only accept false as false value
 111     local = !(params[:local] == false)
 112
 113     with data <- %{
 114            "to" => to,
 115            "cc" => cc,
 116            "type" => "Update",
 117            "actor" => actor,
 118            "object" => object
 119          },
 120          {:ok, activity} <- insert(data, local),
 121          :ok <- maybe_federate(activity) do
 122       {:ok, activity}
 123     end
 124   end
 125
 126   # TODO: This is weird, maybe we shouldn't check here if we can make the activity.
 127   def like(
 128         %User{ap_id: ap_id} = user,
 129         %Object{data: %{"id" => _}} = object,
 130         activity_id \\ nil,
 131         local \\ true
 132       ) do
 133     with nil <- get_existing_like(ap_id, object),
 134          like_data <- make_like_data(user, object, activity_id),
 135          {:ok, activity} <- insert(like_data, local),
 136          {:ok, object} <- add_like_to_object(activity, object),
 137          :ok <- maybe_federate(activity) do
 138       {:ok, activity, object}
 139     else
 140       %Activity{} = activity -> {:ok, activity, object}
 141       error -> {:error, error}
 142     end
 143   end
 144
 145   def unlike(
 146         %User{} = actor,
 147         %Object{} = object,
 148         activity_id \\ nil,
 149         local \\ true
 150       ) do
 151     with %Activity{} = like_activity <- get_existing_like(actor.ap_id, object),
 152          unlike_data <- make_unlike_data(actor, like_activity, activity_id),
 153          {:ok, unlike_activity} <- insert(unlike_data, local),
 154          {:ok, _activity} <- Repo.delete(like_activity),
 155          {:ok, object} <- remove_like_from_object(like_activity, object),
 156          :ok <- maybe_federate(unlike_activity) do
 157       {:ok, unlike_activity, like_activity, object}
 158     else
 159       _e -> {:ok, object}
 160     end
 161   end
 162
 163   def announce(
 164         %User{ap_id: _} = user,
 165         %Object{data: %{"id" => _}} = object,
 166         activity_id \\ nil,
 167         local \\ true
 168       ) do
 169     with true <- is_public?(object),
 170          announce_data <- make_announce_data(user, object, activity_id),
 171          {:ok, activity} <- insert(announce_data, local),
 172          {:ok, object} <- add_announce_to_object(activity, object),
 173          :ok <- maybe_federate(activity) do
 174       {:ok, activity, object}
 175     else
 176       error -> {:error, error}
 177     end
 178   end
 179
 180   def unannounce(
 181         %User{} = actor,
 182         %Object{} = object,
 183         activity_id \\ nil,
 184         local \\ true
 185       ) do
 186     with %Activity{} = announce_activity <- get_existing_announce(actor.ap_id, object),
 187          unannounce_data <- make_unannounce_data(actor, announce_activity, activity_id),
 188          {:ok, unannounce_activity} <- insert(unannounce_data, local),
 189          :ok <- maybe_federate(unannounce_activity),
 190          {:ok, _activity} <- Repo.delete(announce_activity),
 191          {:ok, object} <- remove_announce_from_object(announce_activity, object) do
 192       {:ok, unannounce_activity, announce_activity, object}
 193     else
 194       _e -> {:ok, object}
 195     end
 196   end
 197
 198   def follow(follower, followed, activity_id \\ nil, local \\ true) do
 199     with data <- make_follow_data(follower, followed, activity_id),
 200          {:ok, activity} <- insert(data, local),
 201          :ok <- maybe_federate(activity) do
 202       {:ok, activity}
 203     end
 204   end
 205
 206   def unfollow(follower, followed, activity_id \\ nil, local \\ true) do
 207     with %Activity{} = follow_activity <- fetch_latest_follow(follower, followed),
 208          unfollow_data <- make_unfollow_data(follower, followed, follow_activity, activity_id),
 209          {:ok, activity} <- insert(unfollow_data, local),
 210          :ok <- maybe_federate(activity) do
 211       {:ok, activity}
 212     end
 213   end
 214
 215   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, local \\ true) do
 216     user = User.get_cached_by_ap_id(actor)
 217
 218     data = %{
 219       "type" => "Delete",
 220       "actor" => actor,
 221       "object" => id,
 222       "to" => [user.follower_address, "https://www.w3.org/ns/activitystreams#Public"]
 223     }
 224
 225     with Repo.delete(object),
 226          Repo.delete_all(Activity.all_non_create_by_object_ap_id_q(id)),
 227          {:ok, activity} <- insert(data, local),
 228          :ok <- maybe_federate(activity),
 229          {:ok, _actor} <- User.decrease_note_count(user) do
 230       {:ok, activity}
 231     end
 232   end
 233
 234   def block(blocker, blocked, activity_id \\ nil, local \\ true) do
 235     follow_activity = fetch_latest_follow(blocker, blocked)
 236
 237     if follow_activity do
 238       unfollow(blocker, blocked, nil, local)
 239     end
 240
 241     with block_data <- make_block_data(blocker, blocked, activity_id),
 242          {:ok, activity} <- insert(block_data, local),
 243          :ok <- maybe_federate(activity) do
 244       {:ok, activity}
 245     end
 246   end
 247
 248   def unblock(blocker, blocked, activity_id \\ nil, local \\ true) do
 249     with %Activity{} = block_activity <- fetch_latest_block(blocker, blocked),
 250          unblock_data <- make_unblock_data(blocker, blocked, block_activity, activity_id),
 251          {:ok, activity} <- insert(unblock_data, local),
 252          :ok <- maybe_federate(activity) do
 253       {:ok, activity}
 254     end
 255   end
 256
 257   def fetch_activities_for_context(context, opts \\ %{}) do
 258     public = ["https://www.w3.org/ns/activitystreams#Public"]
 259
 260     recipients =
 261       if opts["user"], do: [opts["user"].ap_id | opts["user"].following] ++ public, else: public
 262
 263     query = from(activity in Activity)
 264
 265     query =
 266       query
 267       |> restrict_blocked(opts)
 268       |> restrict_recipients(recipients, opts["user"])
 269
 270     query =
 271       from(
 272         activity in query,
 273         where:
 274           fragment(
 275             "?->>'type' = ? and ?->>'context' = ?",
 276             activity.data,
 277             "Create",
 278             activity.data,
 279             ^context
 280           ),
 281         order_by: [desc: :id]
 282       )
 283
 284     Repo.all(query)
 285   end
 286
 287   def fetch_public_activities(opts \\ %{}) do
 288     q = fetch_activities_query(["https://www.w3.org/ns/activitystreams#Public"], opts)
 289
 290     q
 291     |> restrict_unlisted()
 292     |> Repo.all()
 293     |> Enum.reverse()
 294   end
 295
 296   def fetch_user_activities(user, reading_user, params \\ %{}) do
 297     params =
 298       params
 299       |> Map.put("type", ["Create", "Announce"])
 300       |> Map.put("actor_id", user.ap_id)
 301       |> Map.put("whole_db", true)
 302
 303     recipients =
 304       if reading_user do
 305         ["https://www.w3.org/ns/activitystreams#Public"] ++
 306           [reading_user.ap_id | reading_user.following]
 307       else
 308         ["https://www.w3.org/ns/activitystreams#Public"]
 309       end
 310
 311     fetch_activities(recipients, params)
 312     |> Enum.reverse()
 313   end
 314
 315   defp restrict_since(query, %{"since_id" => since_id}) do
 316     from(activity in query, where: activity.id > ^since_id)
 317   end
 318
 319   defp restrict_since(query, _), do: query
 320
 321   defp restrict_tag(query, %{"tag" => tag}) do
 322     from(
 323       activity in query,
 324       where: fragment("? <@ (? #> '{\"object\",\"tag\"}')", ^tag, activity.data)
 325     )
 326   end
 327
 328   defp restrict_tag(query, _), do: query
 329
 330   defp restrict_recipients(query, [], _user), do: query
 331
 332   defp restrict_recipients(query, recipients, nil) do
 333     from(activity in query, where: fragment("? && ?", ^recipients, activity.recipients))
 334   end
 335
 336   defp restrict_recipients(query, recipients, user) do
 337     from(
 338       activity in query,
 339       where: fragment("? && ?", ^recipients, activity.recipients),
 340       or_where: activity.actor == ^user.ap_id
 341     )
 342   end
 343
 344   defp restrict_limit(query, %{"limit" => limit}) do
 345     from(activity in query, limit: ^limit)
 346   end
 347
 348   defp restrict_limit(query, _), do: query
 349
 350   defp restrict_local(query, %{"local_only" => true}) do
 351     from(activity in query, where: activity.local == true)
 352   end
 353
 354   defp restrict_local(query, _), do: query
 355
 356   defp restrict_max(query, %{"max_id" => max_id}) do
 357     from(activity in query, where: activity.id < ^max_id)
 358   end
 359
 360   defp restrict_max(query, _), do: query
 361
 362   defp restrict_actor(query, %{"actor_id" => actor_id}) do
 363     from(activity in query, where: activity.actor == ^actor_id)
 364   end
 365
 366   defp restrict_actor(query, _), do: query
 367
 368   defp restrict_type(query, %{"type" => type}) when is_binary(type) do
 369     restrict_type(query, %{"type" => [type]})
 370   end
 371
 372   defp restrict_type(query, %{"type" => type}) do
 373     from(activity in query, where: fragment("?->>'type' = ANY(?)", activity.data, ^type))
 374   end
 375
 376   defp restrict_type(query, _), do: query
 377
 378   defp restrict_favorited_by(query, %{"favorited_by" => ap_id}) do
 379     from(
 380       activity in query,
 381       where: fragment("? <@ (? #> '{\"object\",\"likes\"}')", ^ap_id, activity.data)
 382     )
 383   end
 384
 385   defp restrict_favorited_by(query, _), do: query
 386
 387   defp restrict_media(query, %{"only_media" => val}) when val == "true" or val == "1" do
 388     from(
 389       activity in query,
 390       where: fragment("not (? #> '{\"object\",\"attachment\"}' = ?)", activity.data, ^[])
 391     )
 392   end
 393
 394   defp restrict_media(query, _), do: query
 395
 396   # Only search through last 100_000 activities by default
 397   defp restrict_recent(query, %{"whole_db" => true}), do: query
 398
 399   defp restrict_recent(query, _) do
 400     since = (Repo.aggregate(Activity, :max, :id) || 0) - 100_000
 401
 402     from(activity in query, where: activity.id > ^since)
 403   end
 404
 405   defp restrict_blocked(query, %{"blocking_user" => %User{info: info}}) do
 406     blocks = info["blocks"] || []
 407
 408     from(
 409       activity in query,
 410       where: fragment("not (? = ANY(?))", activity.actor, ^blocks),
 411       where: fragment("not (?->'to' \\?| ?)", activity.data, ^blocks)
 412     )
 413   end
 414
 415   defp restrict_blocked(query, _), do: query
 416
 417   defp restrict_unlisted(query) do
 418     from(
 419       activity in query,
 420       where:
 421         fragment(
 422           "not (coalesce(?->'cc', '{}'::jsonb) \\?| ?)",
 423           activity.data,
 424           ^["https://www.w3.org/ns/activitystreams#Public"]
 425         )
 426     )
 427   end
 428
 429   def fetch_activities_query(recipients, opts \\ %{}) do
 430     base_query =
 431       from(
 432         activity in Activity,
 433         limit: 20,
 434         order_by: [fragment("? desc nulls last", activity.id)]
 435       )
 436
 437     base_query
 438     |> restrict_recipients(recipients, opts["user"])
 439     |> restrict_tag(opts)
 440     |> restrict_since(opts)
 441     |> restrict_local(opts)
 442     |> restrict_limit(opts)
 443     |> restrict_max(opts)
 444     |> restrict_actor(opts)
 445     |> restrict_type(opts)
 446     |> restrict_favorited_by(opts)
 447     |> restrict_recent(opts)
 448     |> restrict_blocked(opts)
 449     |> restrict_media(opts)
 450   end
 451
 452   def fetch_activities(recipients, opts \\ %{}) do
 453     fetch_activities_query(recipients, opts)
 454     |> Repo.all()
 455     |> Enum.reverse()
 456   end
 457
 458   def upload(file) do
 459     data = Upload.store(file)
 460     Repo.insert(%Object{data: data})
 461   end
 462
 463   def user_data_from_user_object(data) do
 464     avatar =
 465       data["icon"]["url"] &&
 466         %{
 467           "type" => "Image",
 468           "url" => [%{"href" => data["icon"]["url"]}]
 469         }
 470
 471     banner =
 472       data["image"]["url"] &&
 473         %{
 474           "type" => "Image",
 475           "url" => [%{"href" => data["image"]["url"]}]
 476         }
 477
 478     locked = data["manuallyApprovesFollowers"] || false
 479     data = Transmogrifier.maybe_fix_user_object(data)
 480
 481     user_data = %{
 482       ap_id: data["id"],
 483       info: %{
 484         "ap_enabled" => true,
 485         "source_data" => data,
 486         "banner" => banner,
 487         "locked" => locked
 488       },
 489       avatar: avatar,
 490       nickname: "#{data["preferredUsername"]}@#{URI.parse(data["id"]).host}",
 491       name: data["name"],
 492       follower_address: data["followers"],
 493       bio: data["summary"]
 494     }
 495
 496     {:ok, user_data}
 497   end
 498
 499   def fetch_and_prepare_user_from_ap_id(ap_id) do
 500     with {:ok, %{status_code: 200, body: body}} <-
 501            @httpoison.get(ap_id, Accept: "application/activity+json"),
 502          {:ok, data} <- Jason.decode(body) do
 503       user_data_from_user_object(data)
 504     else
 505       e -> Logger.error("Could not decode user at fetch #{ap_id}, #{inspect(e)}")
 506     end
 507   end
 508
 509   def make_user_from_ap_id(ap_id) do
 510     if _user = User.get_by_ap_id(ap_id) do
 511       Transmogrifier.upgrade_user_from_ap_id(ap_id)
 512     else
 513       with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
 514         User.insert_or_update_user(data)
 515       else
 516         e -> {:error, e}
 517       end
 518     end
 519   end
 520
 521   def make_user_from_nickname(nickname) do
 522     with {:ok, %{"ap_id" => ap_id}} when not is_nil(ap_id) <- WebFinger.finger(nickname) do
 523       make_user_from_ap_id(ap_id)
 524     else
 525       _e -> {:error, "No AP id in WebFinger"}
 526     end
 527   end
 528
 529   def publish(actor, activity) do
 530     followers =
 531       if actor.follower_address in activity.recipients do
 532         {:ok, followers} = User.get_followers(actor)
 533         followers |> Enum.filter(&(!&1.local))
 534       else
 535         []
 536       end
 537
 538     remote_inboxes =
 539       (Pleroma.Web.Salmon.remote_users(activity) ++ followers)
 540       |> Enum.filter(fn user -> User.ap_enabled?(user) end)
 541       |> Enum.map(fn %{info: %{"source_data" => data}} ->
 542         (data["endpoints"] && data["endpoints"]["sharedInbox"]) || data["inbox"]
 543       end)
 544       |> Enum.uniq()
 545
 546     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 547     json = Jason.encode!(data)
 548
 549     Enum.each(remote_inboxes, fn inbox ->
 550       Federator.enqueue(:publish_single_ap, %{
 551         inbox: inbox,
 552         json: json,
 553         actor: actor,
 554         id: activity.data["id"]
 555       })
 556     end)
 557   end
 558
 559   def publish_one(%{inbox: inbox, json: json, actor: actor, id: id}) do
 560     Logger.info("Federating #{id} to #{inbox}")
 561     host = URI.parse(inbox).host
 562
 563     signature =
 564       Pleroma.Web.HTTPSignatures.sign(actor, %{host: host, "content-length": byte_size(json)})
 565
 566     @httpoison.post(
 567       inbox,
 568       json,
 569       [{"Content-Type", "application/activity+json"}, {"signature", signature}],
 570       hackney: [pool: :default]
 571     )
 572   end
 573
 574   # TODO:
 575   # This will create a Create activity, which we need internally at the moment.
 576   def fetch_object_from_id(id) do
 577     if object = Object.get_cached_by_ap_id(id) do
 578       {:ok, object}
 579     else
 580       Logger.info("Fetching #{id} via AP")
 581
 582       with true <- String.starts_with?(id, "http"),
 583            {:ok, %{body: body, status_code: code}} when code in 200..299 <-
 584              @httpoison.get(
 585                id,
 586                [Accept: "application/activity+json"],
 587                follow_redirect: true,
 588                timeout: 10000,
 589                recv_timeout: 20000
 590              ),
 591            {:ok, data} <- Jason.decode(body),
 592            nil <- Object.get_by_ap_id(data["id"]),
 593            params <- %{
 594              "type" => "Create",
 595              "to" => data["to"],
 596              "cc" => data["cc"],
 597              "actor" => data["attributedTo"],
 598              "object" => data
 599            },
 600            {:ok, activity} <- Transmogrifier.handle_incoming(params) do
 601         {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
 602       else
 603         object = %Object{} ->
 604           {:ok, object}
 605
 606         _e ->
 607           Logger.info("Couldn't get object via AP, trying out OStatus fetching...")
 608
 609           case OStatus.fetch_activity_from_url(id) do
 610             {:ok, [activity | _]} -> {:ok, Object.get_by_ap_id(activity.data["object"]["id"])}
 611             e -> e
 612           end
 613       end
 614     end
 615   end
 616
 617   def is_public?(activity) do
 618     "https://www.w3.org/ns/activitystreams#Public" in (activity.data["to"] ++
 619                                                          (activity.data["cc"] || []))
 620   end
 621
 622   def visible_for_user?(activity, nil) do
 623     is_public?(activity)
 624   end
 625
 626   def visible_for_user?(activity, user) do
 627     x = [user.ap_id | user.following]
 628     y = activity.data["to"] ++ (activity.data["cc"] || [])
 629     visible_for_user?(activity, nil) || Enum.any?(x, &(&1 in y))
 630   end
 631 end