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

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