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