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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.User do
   6   use Ecto.Schema
   7
   8   import Ecto.{Changeset, Query}
   9   alias Pleroma.{Repo, User, Object, Web, Activity, Notification}
  10   alias Comeonin.Pbkdf2
  11   alias Pleroma.Formatter
  12   alias Pleroma.Web.CommonAPI.Utils, as: CommonUtils
  13   alias Pleroma.Web.{OStatus, Websub, OAuth}
  14   alias Pleroma.Web.ActivityPub.{Utils, ActivityPub}
  15
  16   require Logger
  17
  18   @type t :: %__MODULE__{}
  19
  20   @email_regex ~r/^[a-zA-Z0-9.!#$%&'*+\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/
  21
  22   @strict_local_nickname_regex ~r/^[a-zA-Z\d]+$/
  23   @extended_local_nickname_regex ~r/^[a-zA-Z\d_-]+$/
  24
  25   schema "users" do
  26     field(:bio, :string)
  27     field(:email, :string)
  28     field(:name, :string)
  29     field(:nickname, :string)
  30     field(:password_hash, :string)
  31     field(:password, :string, virtual: true)
  32     field(:password_confirmation, :string, virtual: true)
  33     field(:following, {:array, :string}, default: [])
  34     field(:ap_id, :string)
  35     field(:avatar, :map)
  36     field(:local, :boolean, default: true)
  37     field(:follower_address, :string)
  38     field(:search_distance, :float, virtual: true)
  39     field(:tags, {:array, :string}, default: [])
  40     field(:last_refreshed_at, :naive_datetime)
  41     has_many(:notifications, Notification)
  42     embeds_one(:info, Pleroma.User.Info)
  43
  44     timestamps()
  45   end
  46
  47   def auth_active?(%User{} = user) do
  48     (user.info && !user.info.confirmation_pending) ||
  49       !Pleroma.Config.get([:instance, :account_activation_required])
  50   end
  51
  52   def superuser?(%User{} = user), do: user.info && User.Info.superuser?(user.info)
  53
  54   def avatar_url(user) do
  55     case user.avatar do
  56       %{"url" => [%{"href" => href} | _]} -> href
  57       _ -> "#{Web.base_url()}/images/avi.png"
  58     end
  59   end
  60
  61   def banner_url(user) do
  62     case user.info.banner do
  63       %{"url" => [%{"href" => href} | _]} -> href
  64       _ -> "#{Web.base_url()}/images/banner.png"
  65     end
  66   end
  67
  68   def profile_url(%User{info: %{source_data: %{"url" => url}}}), do: url
  69   def profile_url(%User{ap_id: ap_id}), do: ap_id
  70   def profile_url(_), do: nil
  71
  72   def ap_id(%User{nickname: nickname}) do
  73     "#{Web.base_url()}/users/#{nickname}"
  74   end
  75
  76   def ap_followers(%User{} = user) do
  77     "#{ap_id(user)}/followers"
  78   end
  79
  80   def follow_changeset(struct, params \\ %{}) do
  81     struct
  82     |> cast(params, [:following])
  83     |> validate_required([:following])
  84   end
  85
  86   def user_info(%User{} = user) do
  87     oneself = if user.local, do: 1, else: 0
  88
  89     %{
  90       following_count: length(user.following) - oneself,
  91       note_count: user.info.note_count,
  92       follower_count: user.info.follower_count,
  93       locked: user.info.locked,
  94       confirmation_pending: user.info.confirmation_pending,
  95       default_scope: user.info.default_scope
  96     }
  97   end
  98
  99   def remote_user_creation(params) do
 100     params =
 101       params
 102       |> Map.put(:info, params[:info] || %{})
 103
 104     info_cng = User.Info.remote_user_creation(%User.Info{}, params[:info])
 105
 106     changes =
 107       %User{}
 108       |> cast(params, [:bio, :name, :ap_id, :nickname, :avatar])
 109       |> validate_required([:name, :ap_id])
 110       |> unique_constraint(:nickname)
 111       |> validate_format(:nickname, @email_regex)
 112       |> validate_length(:bio, max: 5000)
 113       |> validate_length(:name, max: 100)
 114       |> put_change(:local, false)
 115       |> put_embed(:info, info_cng)
 116
 117     if changes.valid? do
 118       case info_cng.changes[:source_data] do
 119         %{"followers" => followers} ->
 120           changes
 121           |> put_change(:follower_address, followers)
 122
 123         _ ->
 124           followers = User.ap_followers(%User{nickname: changes.changes[:nickname]})
 125
 126           changes
 127           |> put_change(:follower_address, followers)
 128       end
 129     else
 130       changes
 131     end
 132   end
 133
 134   def update_changeset(struct, params \\ %{}) do
 135     struct
 136     |> cast(params, [:bio, :name, :avatar])
 137     |> unique_constraint(:nickname)
 138     |> validate_format(:nickname, local_nickname_regex())
 139     |> validate_length(:bio, max: 5000)
 140     |> validate_length(:name, min: 1, max: 100)
 141   end
 142
 143   def upgrade_changeset(struct, params \\ %{}) do
 144     params =
 145       params
 146       |> Map.put(:last_refreshed_at, NaiveDateTime.utc_now())
 147
 148     info_cng =
 149       struct.info
 150       |> User.Info.user_upgrade(params[:info])
 151
 152     struct
 153     |> cast(params, [:bio, :name, :follower_address, :avatar, :last_refreshed_at])
 154     |> unique_constraint(:nickname)
 155     |> validate_format(:nickname, local_nickname_regex())
 156     |> validate_length(:bio, max: 5000)
 157     |> validate_length(:name, max: 100)
 158     |> put_embed(:info, info_cng)
 159   end
 160
 161   def password_update_changeset(struct, params) do
 162     changeset =
 163       struct
 164       |> cast(params, [:password, :password_confirmation])
 165       |> validate_required([:password, :password_confirmation])
 166       |> validate_confirmation(:password)
 167
 168     OAuth.Token.delete_user_tokens(struct)
 169     OAuth.Authorization.delete_user_authorizations(struct)
 170
 171     if changeset.valid? do
 172       hashed = Pbkdf2.hashpwsalt(changeset.changes[:password])
 173
 174       changeset
 175       |> put_change(:password_hash, hashed)
 176     else
 177       changeset
 178     end
 179   end
 180
 181   def reset_password(user, data) do
 182     update_and_set_cache(password_update_changeset(user, data))
 183   end
 184
 185   def register_changeset(struct, params \\ %{}, opts \\ []) do
 186     confirmation_status =
 187       if opts[:confirmed] || !Pleroma.Config.get([:instance, :account_activation_required]) do
 188         :confirmed
 189       else
 190         :unconfirmed
 191       end
 192
 193     info_change = User.Info.confirmation_changeset(%User.Info{}, confirmation_status)
 194
 195     changeset =
 196       struct
 197       |> cast(params, [:bio, :email, :name, :nickname, :password, :password_confirmation])
 198       |> validate_required([:email, :name, :nickname, :password, :password_confirmation])
 199       |> validate_confirmation(:password)
 200       |> unique_constraint(:email)
 201       |> unique_constraint(:nickname)
 202       |> validate_exclusion(:nickname, Pleroma.Config.get([Pleroma.User, :restricted_nicknames]))
 203       |> validate_format(:nickname, local_nickname_regex())
 204       |> validate_format(:email, @email_regex)
 205       |> validate_length(:bio, max: 1000)
 206       |> validate_length(:name, min: 1, max: 100)
 207       |> put_change(:info, info_change)
 208
 209     if changeset.valid? do
 210       hashed = Pbkdf2.hashpwsalt(changeset.changes[:password])
 211       ap_id = User.ap_id(%User{nickname: changeset.changes[:nickname]})
 212       followers = User.ap_followers(%User{nickname: changeset.changes[:nickname]})
 213
 214       changeset
 215       |> put_change(:password_hash, hashed)
 216       |> put_change(:ap_id, ap_id)
 217       |> put_change(:following, [followers])
 218       |> put_change(:follower_address, followers)
 219     else
 220       changeset
 221     end
 222   end
 223
 224   @doc "Inserts provided changeset, performs post-registration actions (confirmation email sending etc.)"
 225   def register(%Ecto.Changeset{} = changeset) do
 226     with {:ok, user} <- Repo.insert(changeset),
 227          {:ok, _} = try_send_confirmation_email(user) do
 228       {:ok, user}
 229     end
 230   end
 231
 232   def try_send_confirmation_email(%User{} = user) do
 233     if user.info.confirmation_pending &&
 234          Pleroma.Config.get([:instance, :account_activation_required]) do
 235       user
 236       |> Pleroma.UserEmail.account_confirmation_email()
 237       |> Pleroma.Mailer.deliver()
 238     else
 239       {:ok, :noop}
 240     end
 241   end
 242
 243   def needs_update?(%User{local: true}), do: false
 244
 245   def needs_update?(%User{local: false, last_refreshed_at: nil}), do: true
 246
 247   def needs_update?(%User{local: false} = user) do
 248     NaiveDateTime.diff(NaiveDateTime.utc_now(), user.last_refreshed_at) >= 86400
 249   end
 250
 251   def needs_update?(_), do: true
 252
 253   def maybe_direct_follow(%User{} = follower, %User{local: true, info: %{locked: true}}) do
 254     {:ok, follower}
 255   end
 256
 257   def maybe_direct_follow(%User{} = follower, %User{local: true} = followed) do
 258     follow(follower, followed)
 259   end
 260
 261   def maybe_direct_follow(%User{} = follower, %User{} = followed) do
 262     if not User.ap_enabled?(followed) do
 263       follow(follower, followed)
 264     else
 265       {:ok, follower}
 266     end
 267   end
 268
 269   def maybe_follow(%User{} = follower, %User{info: _info} = followed) do
 270     if not following?(follower, followed) do
 271       follow(follower, followed)
 272     else
 273       {:ok, follower}
 274     end
 275   end
 276
 277   def follow(%User{} = follower, %User{info: info} = followed) do
 278     user_config = Application.get_env(:pleroma, :user)
 279     deny_follow_blocked = Keyword.get(user_config, :deny_follow_blocked)
 280
 281     ap_followers = followed.follower_address
 282
 283     cond do
 284       following?(follower, followed) or info.deactivated ->
 285         {:error, "Could not follow user: #{followed.nickname} is already on your list."}
 286
 287       deny_follow_blocked and blocks?(followed, follower) ->
 288         {:error, "Could not follow user: #{followed.nickname} blocked you."}
 289
 290       true ->
 291         if !followed.local && follower.local && !ap_enabled?(followed) do
 292           Websub.subscribe(follower, followed)
 293         end
 294
 295         following =
 296           [ap_followers | follower.following]
 297           |> Enum.uniq()
 298
 299         follower =
 300           follower
 301           |> follow_changeset(%{following: following})
 302           |> update_and_set_cache
 303
 304         {:ok, _} = update_follower_count(followed)
 305
 306         follower
 307     end
 308   end
 309
 310   def unfollow(%User{} = follower, %User{} = followed) do
 311     ap_followers = followed.follower_address
 312
 313     if following?(follower, followed) and follower.ap_id != followed.ap_id do
 314       following =
 315         follower.following
 316         |> List.delete(ap_followers)
 317
 318       {:ok, follower} =
 319         follower
 320         |> follow_changeset(%{following: following})
 321         |> update_and_set_cache
 322
 323       {:ok, followed} = update_follower_count(followed)
 324
 325       {:ok, follower, Utils.fetch_latest_follow(follower, followed)}
 326     else
 327       {:error, "Not subscribed!"}
 328     end
 329   end
 330
 331   @spec following?(User.t(), User.t()) :: boolean
 332   def following?(%User{} = follower, %User{} = followed) do
 333     Enum.member?(follower.following, followed.follower_address)
 334   end
 335
 336   def follow_import(%User{} = follower, followed_identifiers)
 337       when is_list(followed_identifiers) do
 338     Enum.map(
 339       followed_identifiers,
 340       fn followed_identifier ->
 341         with %User{} = followed <- get_or_fetch(followed_identifier),
 342              {:ok, follower} <- maybe_direct_follow(follower, followed),
 343              {:ok, _} <- ActivityPub.follow(follower, followed) do
 344           followed
 345         else
 346           err ->
 347             Logger.debug("follow_import failed for #{followed_identifier} with: #{inspect(err)}")
 348             err
 349         end
 350       end
 351     )
 352   end
 353
 354   def locked?(%User{} = user) do
 355     user.info.locked || false
 356   end
 357
 358   def get_by_ap_id(ap_id) do
 359     Repo.get_by(User, ap_id: ap_id)
 360   end
 361
 362   def update_and_set_cache(changeset) do
 363     with {:ok, user} <- Repo.update(changeset) do
 364       Cachex.put(:user_cache, "ap_id:#{user.ap_id}", user)
 365       Cachex.put(:user_cache, "nickname:#{user.nickname}", user)
 366       Cachex.put(:user_cache, "user_info:#{user.id}", user_info(user))
 367       {:ok, user}
 368     else
 369       e -> e
 370     end
 371   end
 372
 373   def invalidate_cache(user) do
 374     Cachex.del(:user_cache, "ap_id:#{user.ap_id}")
 375     Cachex.del(:user_cache, "nickname:#{user.nickname}")
 376     Cachex.del(:user_cache, "user_info:#{user.id}")
 377   end
 378
 379   def get_cached_by_ap_id(ap_id) do
 380     key = "ap_id:#{ap_id}"
 381     Cachex.fetch!(:user_cache, key, fn _ -> get_by_ap_id(ap_id) end)
 382   end
 383
 384   def get_cached_by_nickname(nickname) do
 385     key = "nickname:#{nickname}"
 386     Cachex.fetch!(:user_cache, key, fn _ -> get_or_fetch_by_nickname(nickname) end)
 387   end
 388
 389   def get_by_nickname(nickname) do
 390     Repo.get_by(User, nickname: nickname) ||
 391       if String.ends_with?(nickname, "@" <> Pleroma.Web.Endpoint.host()) do
 392         [local_nickname, _] = String.split(nickname, "@")
 393         Repo.get_by(User, nickname: local_nickname)
 394       end
 395   end
 396
 397   def get_by_nickname_or_email(nickname_or_email) do
 398     case user = Repo.get_by(User, nickname: nickname_or_email) do
 399       %User{} -> user
 400       nil -> Repo.get_by(User, email: nickname_or_email)
 401     end
 402   end
 403
 404   def get_cached_user_info(user) do
 405     key = "user_info:#{user.id}"
 406     Cachex.fetch!(:user_cache, key, fn _ -> user_info(user) end)
 407   end
 408
 409   def fetch_by_nickname(nickname) do
 410     ap_try = ActivityPub.make_user_from_nickname(nickname)
 411
 412     case ap_try do
 413       {:ok, user} -> {:ok, user}
 414       _ -> OStatus.make_user(nickname)
 415     end
 416   end
 417
 418   def get_or_fetch_by_nickname(nickname) do
 419     with %User{} = user <- get_by_nickname(nickname) do
 420       user
 421     else
 422       _e ->
 423         with [_nick, _domain] <- String.split(nickname, "@"),
 424              {:ok, user} <- fetch_by_nickname(nickname) do
 425           user
 426         else
 427           _e -> nil
 428         end
 429     end
 430   end
 431
 432   def get_followers_query(%User{id: id, follower_address: follower_address}) do
 433     from(
 434       u in User,
 435       where: fragment("? <@ ?", ^[follower_address], u.following),
 436       where: u.id != ^id
 437     )
 438   end
 439
 440   def get_followers(user) do
 441     q = get_followers_query(user)
 442
 443     {:ok, Repo.all(q)}
 444   end
 445
 446   def get_friends_query(%User{id: id, following: following}) do
 447     from(
 448       u in User,
 449       where: u.follower_address in ^following,
 450       where: u.id != ^id
 451     )
 452   end
 453
 454   def get_friends(user) do
 455     q = get_friends_query(user)
 456
 457     {:ok, Repo.all(q)}
 458   end
 459
 460   def get_follow_requests_query(%User{} = user) do
 461     from(
 462       a in Activity,
 463       where:
 464         fragment(
 465           "? ->> 'type' = 'Follow'",
 466           a.data
 467         ),
 468       where:
 469         fragment(
 470           "? ->> 'state' = 'pending'",
 471           a.data
 472         ),
 473       where:
 474         fragment(
 475           "? @> ?",
 476           a.data,
 477           ^%{"object" => user.ap_id}
 478         )
 479     )
 480   end
 481
 482   def get_follow_requests(%User{} = user) do
 483     q = get_follow_requests_query(user)
 484     reqs = Repo.all(q)
 485
 486     users =
 487       Enum.map(reqs, fn req -> req.actor end)
 488       |> Enum.uniq()
 489       |> Enum.map(fn ap_id -> get_by_ap_id(ap_id) end)
 490       |> Enum.filter(fn u -> !following?(u, user) end)
 491
 492     {:ok, users}
 493   end
 494
 495   def increase_note_count(%User{} = user) do
 496     info_cng = User.Info.add_to_note_count(user.info, 1)
 497
 498     cng =
 499       change(user)
 500       |> put_embed(:info, info_cng)
 501
 502     update_and_set_cache(cng)
 503   end
 504
 505   def decrease_note_count(%User{} = user) do
 506     info_cng = User.Info.add_to_note_count(user.info, -1)
 507
 508     cng =
 509       change(user)
 510       |> put_embed(:info, info_cng)
 511
 512     update_and_set_cache(cng)
 513   end
 514
 515   def update_note_count(%User{} = user) do
 516     note_count_query =
 517       from(
 518         a in Object,
 519         where: fragment("?->>'actor' = ? and ?->>'type' = 'Note'", a.data, ^user.ap_id, a.data),
 520         select: count(a.id)
 521       )
 522
 523     note_count = Repo.one(note_count_query)
 524
 525     info_cng = User.Info.set_note_count(user.info, note_count)
 526
 527     cng =
 528       change(user)
 529       |> put_embed(:info, info_cng)
 530
 531     update_and_set_cache(cng)
 532   end
 533
 534   def update_follower_count(%User{} = user) do
 535     follower_count_query =
 536       from(
 537         u in User,
 538         where: ^user.follower_address in u.following,
 539         where: u.id != ^user.id,
 540         select: count(u.id)
 541       )
 542
 543     follower_count = Repo.one(follower_count_query)
 544
 545     info_cng =
 546       user.info
 547       |> User.Info.set_follower_count(follower_count)
 548
 549     cng =
 550       change(user)
 551       |> put_embed(:info, info_cng)
 552
 553     update_and_set_cache(cng)
 554   end
 555
 556   def get_users_from_set_query(ap_ids, false) do
 557     from(
 558       u in User,
 559       where: u.ap_id in ^ap_ids
 560     )
 561   end
 562
 563   def get_users_from_set_query(ap_ids, true) do
 564     query = get_users_from_set_query(ap_ids, false)
 565
 566     from(
 567       u in query,
 568       where: u.local == true
 569     )
 570   end
 571
 572   def get_users_from_set(ap_ids, local_only \\ true) do
 573     get_users_from_set_query(ap_ids, local_only)
 574     |> Repo.all()
 575   end
 576
 577   def get_recipients_from_activity(%Activity{recipients: to}) do
 578     query =
 579       from(
 580         u in User,
 581         where: u.ap_id in ^to,
 582         or_where: fragment("? && ?", u.following, ^to)
 583       )
 584
 585     query = from(u in query, where: u.local == true)
 586
 587     Repo.all(query)
 588   end
 589
 590   def search(query, resolve \\ false) do
 591     # strip the beginning @ off if there is a query
 592     query = String.trim_leading(query, "@")
 593
 594     if resolve do
 595       User.get_or_fetch_by_nickname(query)
 596     end
 597
 598     inner =
 599       from(
 600         u in User,
 601         select_merge: %{
 602           search_distance:
 603             fragment(
 604               "? <-> (? || ?)",
 605               ^query,
 606               u.nickname,
 607               u.name
 608             )
 609         },
 610         where: not is_nil(u.nickname)
 611       )
 612
 613     q =
 614       from(
 615         s in subquery(inner),
 616         order_by: s.search_distance,
 617         limit: 20
 618       )
 619
 620     Repo.all(q)
 621   end
 622
 623   def blocks_import(%User{} = blocker, blocked_identifiers) when is_list(blocked_identifiers) do
 624     Enum.map(
 625       blocked_identifiers,
 626       fn blocked_identifier ->
 627         with %User{} = blocked <- get_or_fetch(blocked_identifier),
 628              {:ok, blocker} <- block(blocker, blocked),
 629              {:ok, _} <- ActivityPub.block(blocker, blocked) do
 630           blocked
 631         else
 632           err ->
 633             Logger.debug("blocks_import failed for #{blocked_identifier} with: #{inspect(err)}")
 634             err
 635         end
 636       end
 637     )
 638   end
 639
 640   def block(blocker, %User{ap_id: ap_id} = blocked) do
 641     # sever any follow relationships to prevent leaks per activitypub (Pleroma issue #213)
 642     blocker =
 643       if following?(blocker, blocked) do
 644         {:ok, blocker, _} = unfollow(blocker, blocked)
 645         blocker
 646       else
 647         blocker
 648       end
 649
 650     if following?(blocked, blocker) do
 651       unfollow(blocked, blocker)
 652     end
 653
 654     info_cng =
 655       blocker.info
 656       |> User.Info.add_to_block(ap_id)
 657
 658     cng =
 659       change(blocker)
 660       |> put_embed(:info, info_cng)
 661
 662     update_and_set_cache(cng)
 663   end
 664
 665   # helper to handle the block given only an actor's AP id
 666   def block(blocker, %{ap_id: ap_id}) do
 667     block(blocker, User.get_by_ap_id(ap_id))
 668   end
 669
 670   def unblock(blocker, %{ap_id: ap_id}) do
 671     info_cng =
 672       blocker.info
 673       |> User.Info.remove_from_block(ap_id)
 674
 675     cng =
 676       change(blocker)
 677       |> put_embed(:info, info_cng)
 678
 679     update_and_set_cache(cng)
 680   end
 681
 682   def blocks?(user, %{ap_id: ap_id}) do
 683     blocks = user.info.blocks
 684     domain_blocks = user.info.domain_blocks
 685     %{host: host} = URI.parse(ap_id)
 686
 687     Enum.member?(blocks, ap_id) ||
 688       Enum.any?(domain_blocks, fn domain ->
 689         host == domain
 690       end)
 691   end
 692
 693   def blocked_users(user),
 694     do: Repo.all(from(u in User, where: u.ap_id in ^user.info.blocks))
 695
 696   def block_domain(user, domain) do
 697     info_cng =
 698       user.info
 699       |> User.Info.add_to_domain_block(domain)
 700
 701     cng =
 702       change(user)
 703       |> put_embed(:info, info_cng)
 704
 705     update_and_set_cache(cng)
 706   end
 707
 708   def unblock_domain(user, domain) do
 709     info_cng =
 710       user.info
 711       |> User.Info.remove_from_domain_block(domain)
 712
 713     cng =
 714       change(user)
 715       |> put_embed(:info, info_cng)
 716
 717     update_and_set_cache(cng)
 718   end
 719
 720   def local_user_query() do
 721     from(
 722       u in User,
 723       where: u.local == true,
 724       where: not is_nil(u.nickname)
 725     )
 726   end
 727
 728   def moderator_user_query() do
 729     from(
 730       u in User,
 731       where: u.local == true,
 732       where: fragment("?->'is_moderator' @> 'true'", u.info)
 733     )
 734   end
 735
 736   def deactivate(%User{} = user, status \\ true) do
 737     info_cng = User.Info.set_activation_status(user.info, status)
 738
 739     cng =
 740       change(user)
 741       |> put_embed(:info, info_cng)
 742
 743     update_and_set_cache(cng)
 744   end
 745
 746   def delete(%User{} = user) do
 747     {:ok, user} = User.deactivate(user)
 748
 749     # Remove all relationships
 750     {:ok, followers} = User.get_followers(user)
 751
 752     followers
 753     |> Enum.each(fn follower -> User.unfollow(follower, user) end)
 754
 755     {:ok, friends} = User.get_friends(user)
 756
 757     friends
 758     |> Enum.each(fn followed -> User.unfollow(user, followed) end)
 759
 760     query = from(a in Activity, where: a.actor == ^user.ap_id)
 761
 762     Repo.all(query)
 763     |> Enum.each(fn activity ->
 764       case activity.data["type"] do
 765         "Create" ->
 766           ActivityPub.delete(Object.normalize(activity.data["object"]))
 767
 768         # TODO: Do something with likes, follows, repeats.
 769         _ ->
 770           "Doing nothing"
 771       end
 772     end)
 773
 774     {:ok, user}
 775   end
 776
 777   def html_filter_policy(%User{info: %{no_rich_text: true}}) do
 778     Pleroma.HTML.Scrubber.TwitterText
 779   end
 780
 781   def html_filter_policy(_), do: nil
 782
 783   def get_or_fetch_by_ap_id(ap_id) do
 784     user = get_by_ap_id(ap_id)
 785
 786     if !is_nil(user) and !User.needs_update?(user) do
 787       user
 788     else
 789       ap_try = ActivityPub.make_user_from_ap_id(ap_id)
 790
 791       case ap_try do
 792         {:ok, user} ->
 793           user
 794
 795         _ ->
 796           case OStatus.make_user(ap_id) do
 797             {:ok, user} -> user
 798             _ -> {:error, "Could not fetch by AP id"}
 799           end
 800       end
 801     end
 802   end
 803
 804   def get_or_create_instance_user do
 805     relay_uri = "#{Pleroma.Web.Endpoint.url()}/relay"
 806
 807     if user = get_by_ap_id(relay_uri) do
 808       user
 809     else
 810       changes =
 811         %User{info: %User.Info{}}
 812         |> cast(%{}, [:ap_id, :nickname, :local])
 813         |> put_change(:ap_id, relay_uri)
 814         |> put_change(:nickname, nil)
 815         |> put_change(:local, true)
 816         |> put_change(:follower_address, relay_uri <> "/followers")
 817
 818       {:ok, user} = Repo.insert(changes)
 819       user
 820     end
 821   end
 822
 823   # AP style
 824   def public_key_from_info(%{
 825         source_data: %{"publicKey" => %{"publicKeyPem" => public_key_pem}}
 826       }) do
 827     key =
 828       public_key_pem
 829       |> :public_key.pem_decode()
 830       |> hd()
 831       |> :public_key.pem_entry_decode()
 832
 833     {:ok, key}
 834   end
 835
 836   # OStatus Magic Key
 837   def public_key_from_info(%{magic_key: magic_key}) do
 838     {:ok, Pleroma.Web.Salmon.decode_key(magic_key)}
 839   end
 840
 841   def get_public_key_for_ap_id(ap_id) do
 842     with %User{} = user <- get_or_fetch_by_ap_id(ap_id),
 843          {:ok, public_key} <- public_key_from_info(user.info) do
 844       {:ok, public_key}
 845     else
 846       _ -> :error
 847     end
 848   end
 849
 850   defp blank?(""), do: nil
 851   defp blank?(n), do: n
 852
 853   def insert_or_update_user(data) do
 854     data =
 855       data
 856       |> Map.put(:name, blank?(data[:name]) || data[:nickname])
 857
 858     cs = User.remote_user_creation(data)
 859
 860     Repo.insert(cs, on_conflict: :replace_all, conflict_target: :nickname)
 861   end
 862
 863   def ap_enabled?(%User{local: true}), do: true
 864   def ap_enabled?(%User{info: info}), do: info.ap_enabled
 865   def ap_enabled?(_), do: false
 866
 867   @doc "Gets or fetch a user by uri or nickname."
 868   @spec get_or_fetch(String.t()) :: User.t()
 869   def get_or_fetch("http" <> _host = uri), do: get_or_fetch_by_ap_id(uri)
 870   def get_or_fetch(nickname), do: get_or_fetch_by_nickname(nickname)
 871
 872   # wait a period of time and return newest version of the User structs
 873   # this is because we have synchronous follow APIs and need to simulate them
 874   # with an async handshake
 875   def wait_and_refresh(_, %User{local: true} = a, %User{local: true} = b) do
 876     with %User{} = a <- Repo.get(User, a.id),
 877          %User{} = b <- Repo.get(User, b.id) do
 878       {:ok, a, b}
 879     else
 880       _e ->
 881         :error
 882     end
 883   end
 884
 885   def wait_and_refresh(timeout, %User{} = a, %User{} = b) do
 886     with :ok <- :timer.sleep(timeout),
 887          %User{} = a <- Repo.get(User, a.id),
 888          %User{} = b <- Repo.get(User, b.id) do
 889       {:ok, a, b}
 890     else
 891       _e ->
 892         :error
 893     end
 894   end
 895
 896   def parse_bio(bio, user \\ %User{info: %{source_data: %{}}})
 897   def parse_bio(nil, _user), do: ""
 898   def parse_bio(bio, _user) when bio == "", do: bio
 899
 900   def parse_bio(bio, user) do
 901     mentions = Formatter.parse_mentions(bio)
 902     tags = Formatter.parse_tags(bio)
 903
 904     emoji =
 905       (user.info.source_data["tag"] || [])
 906       |> Enum.filter(fn %{"type" => t} -> t == "Emoji" end)
 907       |> Enum.map(fn %{"icon" => %{"url" => url}, "name" => name} ->
 908         {String.trim(name, ":"), url}
 909       end)
 910
 911     bio
 912     |> CommonUtils.format_input(mentions, tags, "text/plain")
 913     |> Formatter.emojify(emoji)
 914   end
 915
 916   def tag(user_identifiers, tags) when is_list(user_identifiers) do
 917     Repo.transaction(fn ->
 918       for user_identifier <- user_identifiers, do: tag(user_identifier, tags)
 919     end)
 920   end
 921
 922   def tag(nickname, tags) when is_binary(nickname),
 923     do: tag(User.get_by_nickname(nickname), tags)
 924
 925   def tag(%User{} = user, tags),
 926     do: update_tags(user, Enum.uniq((user.tags || []) ++ normalize_tags(tags)))
 927
 928   def untag(user_identifiers, tags) when is_list(user_identifiers) do
 929     Repo.transaction(fn ->
 930       for user_identifier <- user_identifiers, do: untag(user_identifier, tags)
 931     end)
 932   end
 933
 934   def untag(nickname, tags) when is_binary(nickname),
 935     do: untag(User.get_by_nickname(nickname), tags)
 936
 937   def untag(%User{} = user, tags),
 938     do: update_tags(user, (user.tags || []) -- normalize_tags(tags))
 939
 940   defp update_tags(%User{} = user, new_tags) do
 941     {:ok, updated_user} =
 942       user
 943       |> change(%{tags: new_tags})
 944       |> Repo.update()
 945
 946     updated_user
 947   end
 948
 949   defp normalize_tags(tags) do
 950     [tags]
 951     |> List.flatten()
 952     |> Enum.map(&String.downcase(&1))
 953   end
 954
 955   defp local_nickname_regex() do
 956     if Pleroma.Config.get([:instance, :extended_nickname_format]) do
 957       @extended_local_nickname_regex
 958     else
 959       @strict_local_nickname_regex
 960     end
 961   end
 962 end