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