Merge branch 'develop' into feature/788-separate-email-addresses

14 files changed, 491 insertions, 67 deletions

diff --git a/lib/mix/tasks/pleroma/user.ex b/lib/mix/tasks/pleroma/user.ex
index 0d0bea8c0..441168df2 100644
--- a/lib/mix/tasks/pleroma/user.ex
+++ b/lib/mix/tasks/pleroma/user.ex
@@ -7,6 +7,7 @@ defmodule Mix.Tasks.Pleroma.User do
   import Ecto.Changeset
   alias Mix.Tasks.Pleroma.Common
   alias Pleroma.User
+  alias Pleroma.UserInviteToken
 
   @shortdoc "Manages Pleroma users"
   @moduledoc """
@@ -26,7 +27,19 @@ defmodule Mix.Tasks.Pleroma.User do
 
   ## Generate an invite link.
 
-      mix pleroma.user invite
+      mix pleroma.user invite [OPTION...]
+
+    Options:
+    - `--expires_at DATE` - last day on which token is active (e.g. "2019-04-05")
+    - `--max_use NUMBER` - maximum numbers of token uses
+
+  ## List generated invites
+
+      mix pleroma.user invites
+
+  ## Revoke invite
+
+      mix pleroma.user revoke_invite TOKEN OR TOKEN_ID
 
   ## Delete the user's account.
 
@@ -287,23 +300,79 @@ defmodule Mix.Tasks.Pleroma.User do
     end
   end
 
-  def run(["invite"]) do
+  def run(["invite" | rest]) do
+    {options, [], []} =
+      OptionParser.parse(rest,
+        strict: [
+          expires_at: :string,
+          max_use: :integer
+        ]
+      )
+
+    options =
+      options
+      |> Keyword.update(:expires_at, {:ok, nil}, fn
+        nil -> {:ok, nil}
+        val -> Date.from_iso8601(val)
+      end)
+      |> Enum.into(%{})
+
     Common.start_pleroma()
 
-    with {:ok, token} <- Pleroma.UserInviteToken.create_token() do
-      Mix.shell().info("Generated user invite token")
+    with {:ok, val} <- options[:expires_at],
+         options = Map.put(options, :expires_at, val),
+         {:ok, invite} <- UserInviteToken.create_invite(options) do
+      Mix.shell().info(
+        "Generated user invite token " <> String.replace(invite.invite_type, "_", " ")
+      )
 
       url =
         Pleroma.Web.Router.Helpers.redirect_url(
           Pleroma.Web.Endpoint,
           :registration_page,
-          token.token
+          invite.token
         )
 
       IO.puts(url)
     else
-      _ ->
-        Mix.shell().error("Could not create invite token.")
+      error ->
+        Mix.shell().error("Could not create invite token: #{inspect(error)}")
+    end
+  end
+
+  def run(["invites"]) do
+    Common.start_pleroma()
+
+    Mix.shell().info("Invites list:")
+
+    UserInviteToken.list_invites()
+    |> Enum.each(fn invite ->
+      expire_info =
+        with expires_at when not is_nil(expires_at) <- invite.expires_at do
+          " | Expires at: #{Date.to_string(expires_at)}"
+        end
+
+      using_info =
+        with max_use when not is_nil(max_use) <- invite.max_use do
+          " | Max use: #{max_use}    Left use: #{max_use - invite.uses}"
+        end
+
+      Mix.shell().info(
+        "ID: #{invite.id} | Token: #{invite.token} | Token type: #{invite.invite_type} | Used: #{
+          invite.used
+        }#{expire_info}#{using_info}"
+      )
+    end)
+  end
+
+  def run(["revoke_invite", token]) do
+    Common.start_pleroma()
+
+    with {:ok, invite} <- UserInviteToken.find_by_token(token),
+         {:ok, _} <- UserInviteToken.update_invite(invite, %{used: true}) do
+      Mix.shell().info("Invite for token #{token} was revoked.")
+    else
+      _ -> Mix.shell().error("No invite found with token #{token}")
     end
   end
 
diff --git a/lib/pleroma/notification.ex b/lib/pleroma/notification.ex
index cac10f24a..15789907a 100644
--- a/lib/pleroma/notification.ex
+++ b/lib/pleroma/notification.ex
@@ -122,13 +122,7 @@ defmodule Pleroma.Notification do
 
   # TODO move to sql, too.
   def create_notification(%Activity{} = activity, %User{} = user) do
-    unless User.blocks?(user, %{ap_id: activity.data["actor"]}) or
-             CommonAPI.thread_muted?(user, activity) or user.ap_id == activity.data["actor"] or
-             (activity.data["type"] == "Follow" and
-                Enum.any?(Notification.for_user(user), fn notif ->
-                  notif.activity.data["type"] == "Follow" and
-                    notif.activity.data["actor"] == activity.data["actor"]
-                end)) do
+    unless skip?(activity, user) do
       notification = %Notification{user_id: user.id, activity: activity}
       {:ok, notification} = Repo.insert(notification)
       Pleroma.Web.Streamer.stream("user", notification)
@@ -148,10 +142,66 @@ defmodule Pleroma.Notification do
       []
       |> Utils.maybe_notify_to_recipients(activity)
       |> Utils.maybe_notify_mentioned_recipients(activity)
+      |> Utils.maybe_notify_subscribers(activity)
       |> Enum.uniq()
 
     User.get_users_from_set(recipients, local_only)
   end
 
   def get_notified_from_activity(_, _local_only), do: []
+
+  def skip?(activity, user) do
+    [:self, :blocked, :local, :muted, :followers, :follows, :recently_followed]
+    |> Enum.any?(&skip?(&1, activity, user))
+  end
+
+  def skip?(:self, activity, user) do
+    activity.data["actor"] == user.ap_id
+  end
+
+  def skip?(:blocked, activity, user) do
+    actor = activity.data["actor"]
+    User.blocks?(user, %{ap_id: actor})
+  end
+
+  def skip?(:local, %{local: true}, %{info: %{notification_settings: %{"local" => false}}}),
+    do: true
+
+  def skip?(:local, %{local: false}, %{info: %{notification_settings: %{"remote" => false}}}),
+    do: true
+
+  def skip?(:muted, activity, user) do
+    actor = activity.data["actor"]
+
+    User.mutes?(user, %{ap_id: actor}) or
+      CommonAPI.thread_muted?(user, activity)
+  end
+
+  def skip?(
+        :followers,
+        activity,
+        %{info: %{notification_settings: %{"followers" => false}}} = user
+      ) do
+    actor = activity.data["actor"]
+    follower = User.get_cached_by_ap_id(actor)
+    User.following?(follower, user)
+  end
+
+  def skip?(:follows, activity, %{info: %{notification_settings: %{"follows" => false}}} = user) do
+    actor = activity.data["actor"]
+    followed = User.get_by_ap_id(actor)
+    User.following?(user, followed)
+  end
+
+  def skip?(:recently_followed, %{data: %{"type" => "Follow"}} = activity, user) do
+    actor = activity.data["actor"]
+
+    Notification.for_user(user)
+    |> Enum.any?(fn
+      %{activity: %{data: %{"type" => "Follow", "actor" => ^actor}}} -> true
+      _ -> false
+    end)
+  end
+
+  def skip?(_, _, _), do: false
 end
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 4f579b597..6e2269aff 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -931,6 +931,38 @@ defmodule Pleroma.User do
     update_and_set_cache(cng)
   end
 
+  def subscribe(subscriber, %{ap_id: ap_id}) do
+    deny_follow_blocked = Pleroma.Config.get([:user, :deny_follow_blocked])
+
+    with %User{} = subscribed <- get_cached_by_ap_id(ap_id) do
+      blocked = blocks?(subscribed, subscriber) and deny_follow_blocked
+
+      if blocked do
+        {:error, "Could not subscribe: #{subscribed.nickname} is blocking you"}
+      else
+        info_cng =
+          subscribed.info
+          |> User.Info.add_to_subscribers(subscriber.ap_id)
+
+        change(subscribed)
+        |> put_embed(:info, info_cng)
+        |> update_and_set_cache()
+      end
+    end
+  end
+
+  def unsubscribe(unsubscriber, %{ap_id: ap_id}) do
+    with %User{} = user <- get_cached_by_ap_id(ap_id) do
+      info_cng =
+        user.info
+        |> User.Info.remove_from_subscribers(unsubscriber.ap_id)
+
+      change(user)
+      |> put_embed(:info, info_cng)
+      |> update_and_set_cache()
+    end
+  end
+
   def block(blocker, %User{ap_id: ap_id} = blocked) do
     # sever any follow relationships to prevent leaks per activitypub (Pleroma issue #213)
     blocker =
@@ -941,6 +973,14 @@ defmodule Pleroma.User do
         blocker
       end
 
+    blocker =
+      if subscribed_to?(blocked, blocker) do
+        {:ok, blocker} = unsubscribe(blocked, blocker)
+        blocker
+      else
+        blocker
+      end
+
     if following?(blocked, blocker) do
       unfollow(blocked, blocker)
     end
@@ -989,12 +1029,21 @@ defmodule Pleroma.User do
       end)
   end
 
+  def subscribed_to?(user, %{ap_id: ap_id}) do
+    with %User{} = target <- User.get_by_ap_id(ap_id) do
+      Enum.member?(target.info.subscribers, user.ap_id)
+    end
+  end
+
   def muted_users(user),
     do: Repo.all(from(u in User, where: u.ap_id in ^user.info.mutes))
 
   def blocked_users(user),
     do: Repo.all(from(u in User, where: u.ap_id in ^user.info.blocks))
 
+  def subscribers(user),
+    do: Repo.all(from(u in User, where: u.ap_id in ^user.info.subscribers))
+
   def block_domain(user, domain) do
     info_cng =
       user.info
@@ -1092,6 +1141,14 @@ defmodule Pleroma.User do
     update_and_set_cache(cng)
   end
 
+  def update_notification_settings(%User{} = user, settings \\ %{}) do
+    info_changeset = User.Info.update_notification_settings(user.info, settings)
+
+    change(user)
+    |> put_embed(:info, info_changeset)
+    |> update_and_set_cache()
+  end
+
   def delete(%User{} = user) do
     {:ok, user} = User.deactivate(user)
 
diff --git a/lib/pleroma/user/info.ex b/lib/pleroma/user/info.ex
index 740a46727..5afa7988c 100644
--- a/lib/pleroma/user/info.ex
+++ b/lib/pleroma/user/info.ex
@@ -22,6 +22,7 @@ defmodule Pleroma.User.Info do
     field(:domain_blocks, {:array, :string}, default: [])
     field(:mutes, {:array, :string}, default: [])
     field(:muted_reblogs, {:array, :string}, default: [])
+    field(:subscribers, {:array, :string}, default: [])
     field(:deactivated, :boolean, default: false)
     field(:no_rich_text, :boolean, default: false)
     field(:ap_enabled, :boolean, default: false)
@@ -40,6 +41,10 @@ defmodule Pleroma.User.Info do
     field(:pinned_activities, {:array, :string}, default: [])
     field(:flavour, :string, default: nil)
 
+    field(:notification_settings, :map,
+      default: %{"remote" => true, "local" => true, "followers" => true, "follows" => true}
+    )
+
     # Found in the wild
     # ap_id -> Where is this used?
     # bio -> Where is this used?
@@ -57,6 +62,19 @@ defmodule Pleroma.User.Info do
     |> validate_required([:deactivated])
   end
 
+  def update_notification_settings(info, settings) do
+    notification_settings =
+      info.notification_settings
+      |> Map.merge(settings)
+      |> Map.take(["remote", "local", "followers", "follows"])
+
+    params = %{notification_settings: notification_settings}
+
+    info
+    |> cast(params, [:notification_settings])
+    |> validate_required([:notification_settings])
+  end
+
   def add_to_note_count(info, number) do
     set_note_count(info, info.note_count + number)
   end
@@ -93,6 +111,14 @@ defmodule Pleroma.User.Info do
     |> validate_required([:blocks])
   end
 
+  def set_subscribers(info, subscribers) do
+    params = %{subscribers: subscribers}
+
+    info
+    |> cast(params, [:subscribers])
+    |> validate_required([:subscribers])
+  end
+
   def add_to_mutes(info, muted) do
     set_mutes(info, Enum.uniq([muted | info.mutes]))
   end
@@ -109,6 +135,14 @@ defmodule Pleroma.User.Info do
     set_blocks(info, List.delete(info.blocks, blocked))
   end
 
+  def add_to_subscribers(info, subscribed) do
+    set_subscribers(info, Enum.uniq([subscribed | info.subscribers]))
+  end
+
+  def remove_from_subscribers(info, subscribed) do
+    set_subscribers(info, List.delete(info.subscribers, subscribed))
+  end
+
   def set_domain_blocks(info, domain_blocks) do
     params = %{domain_blocks: domain_blocks}
 
diff --git a/lib/pleroma/user_invite_token.ex b/lib/pleroma/user_invite_token.ex
index 9c5579934..86f0a5486 100644
--- a/lib/pleroma/user_invite_token.ex
+++ b/lib/pleroma/user_invite_token.ex
@@ -6,40 +6,119 @@ defmodule Pleroma.UserInviteToken do
   use Ecto.Schema
 
   import Ecto.Changeset
-
+  import Ecto.Query
   alias Pleroma.Repo
   alias Pleroma.UserInviteToken
 
+  @type t :: %__MODULE__{}
+  @type token :: String.t()
+
   schema "user_invite_tokens" do
     field(:token, :string)
     field(:used, :boolean, default: false)
+    field(:max_use, :integer)
+    field(:expires_at, :date)
+    field(:uses, :integer, default: 0)
+    field(:invite_type, :string)
 
     timestamps()
   end
 
-  def create_token do
+  @spec create_invite(map()) :: UserInviteToken.t()
+  def create_invite(params \\ %{}) do
+    %UserInviteToken{}
+    |> cast(params, [:max_use, :expires_at])
+    |> add_token()
+    |> assign_type()
+    |> Repo.insert()
+  end
+
+  defp add_token(changeset) do
     token = :crypto.strong_rand_bytes(32) |> Base.url_encode64()
+    put_change(changeset, :token, token)
+  end
 
-    token = %UserInviteToken{
-      used: false,
-      token: token
-    }
+  defp assign_type(%{changes: %{max_use: _max_use, expires_at: _expires_at}} = changeset) do
+    put_change(changeset, :invite_type, "reusable_date_limited")
+  end
+
+  defp assign_type(%{changes: %{expires_at: _expires_at}} = changeset) do
+    put_change(changeset, :invite_type, "date_limited")
+  end
+
+  defp assign_type(%{changes: %{max_use: _max_use}} = changeset) do
+    put_change(changeset, :invite_type, "reusable")
+  end
+
+  defp assign_type(changeset), do: put_change(changeset, :invite_type, "one_time")
 
-    Repo.insert(token)
+  @spec list_invites() :: [UserInviteToken.t()]
+  def list_invites do
+    query = from(u in UserInviteToken, order_by: u.id)
+    Repo.all(query)
   end
 
-  def used_changeset(struct) do
-    struct
-    |> cast(%{}, [])
-    |> put_change(:used, true)
+  @spec update_invite!(UserInviteToken.t(), map()) :: UserInviteToken.t() | no_return()
+  def update_invite!(invite, changes) do
+    change(invite, changes) |> Repo.update!()
   end
 
-  def mark_as_used(token) do
-    with %{used: false} = token <- Repo.get_by(UserInviteToken, %{token: token}),
-         {:ok, token} <- Repo.update(used_changeset(token)) do
-      {:ok, token}
-    else
-      _e -> {:error, token}
+  @spec update_invite(UserInviteToken.t(), map()) ::
+          {:ok, UserInviteToken.t()} | {:error, Changeset.t()}
+  def update_invite(invite, changes) do
+    change(invite, changes) |> Repo.update()
+  end
+
+  @spec find_by_token!(token()) :: UserInviteToken.t() | no_return()
+  def find_by_token!(token), do: Repo.get_by!(UserInviteToken, token: token)
+
+  @spec find_by_token(token()) :: {:ok, UserInviteToken.t()} | nil
+  def find_by_token(token) do
+    with invite <- Repo.get_by(UserInviteToken, token: token) do
+      {:ok, invite}
     end
   end
+
+  @spec valid_invite?(UserInviteToken.t()) :: boolean()
+  def valid_invite?(%{invite_type: "one_time"} = invite) do
+    not invite.used
+  end
+
+  def valid_invite?(%{invite_type: "date_limited"} = invite) do
+    not_overdue_date?(invite) and not invite.used
+  end
+
+  def valid_invite?(%{invite_type: "reusable"} = invite) do
+    invite.uses < invite.max_use and not invite.used
+  end
+
+  def valid_invite?(%{invite_type: "reusable_date_limited"} = invite) do
+    not_overdue_date?(invite) and invite.uses < invite.max_use and not invite.used
+  end
+
+  defp not_overdue_date?(%{expires_at: expires_at}) do
+    Date.compare(Date.utc_today(), expires_at) in [:lt, :eq]
+  end
+
+  @spec update_usage!(UserInviteToken.t()) :: nil | UserInviteToken.t() | no_return()
+  def update_usage!(%{invite_type: "date_limited"}), do: nil
+
+  def update_usage!(%{invite_type: "one_time"} = invite),
+    do: update_invite!(invite, %{used: true})
+
+  def update_usage!(%{invite_type: invite_type} = invite)
+      when invite_type == "reusable" or invite_type == "reusable_date_limited" do
+    changes = %{
+      uses: invite.uses + 1
+    }
+
+    changes =
+      if changes.uses >= invite.max_use do
+        Map.put(changes, :used, true)
+      else
+        changes
+      end
+
+    update_invite!(invite, changes)
+  end
 end
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index 593ae3188..49ea73204 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -83,6 +83,22 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> fix_content_map
     |> fix_likes
     |> fix_addressing
+    |> fix_summary
+  end
+
+  def fix_summary(%{"summary" => nil} = object) do
+    object
+    |> Map.put("summary", "")
+  end
+
+  def fix_summary(%{"summary" => _} = object) do
+    # summary is present, nothing to do
+    object
+  end
+
+  def fix_summary(object) do
+    object
+    |> Map.put("summary", "")
   end
 
   def fix_addressing_list(map, field) do
diff --git a/lib/pleroma/web/admin_api/admin_api_controller.ex b/lib/pleroma/web/admin_api/admin_api_controller.ex
index 78bf31893..70a5b5c5d 100644
--- a/lib/pleroma/web/admin_api/admin_api_controller.ex
+++ b/lib/pleroma/web/admin_api/admin_api_controller.ex
@@ -5,6 +5,7 @@
 defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   use Pleroma.Web, :controller
   alias Pleroma.User
+  alias Pleroma.UserInviteToken
   alias Pleroma.Web.ActivityPub.Relay
   alias Pleroma.Web.AdminAPI.AccountView
   alias Pleroma.Web.AdminAPI.Search
@@ -235,7 +236,7 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     with true <-
            Pleroma.Config.get([:instance, :invites_enabled]) &&
              !Pleroma.Config.get([:instance, :registrations_open]),
-         {:ok, invite_token} <- Pleroma.UserInviteToken.create_token(),
+         {:ok, invite_token} <- UserInviteToken.create_invite(),
          email <-
            Pleroma.UserEmail.user_invitation_email(user, invite_token, email, params["name"]),
          {:ok, _} <- Pleroma.Mailer.deliver(email) do
@@ -244,11 +245,29 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   end
 
   @doc "Get a account registeration invite token (base64 string)"
-  def get_invite_token(conn, _params) do
-    {:ok, token} = Pleroma.UserInviteToken.create_token()
+  def get_invite_token(conn, params) do
+    options = params["invite"] || %{}
+    {:ok, invite} = UserInviteToken.create_invite(options)
 
     conn
-    |> json(token.token)
+    |> json(invite.token)
+  end
+
+  @doc "Get list of created invites"
+  def invites(conn, _params) do
+    invites = UserInviteToken.list_invites()
+
+    conn
+    |> json(AccountView.render("invites.json", %{invites: invites}))
+  end
+
+  @doc "Revokes invite by token"
+  def revoke_invite(conn, %{"token" => token}) do
+    invite = UserInviteToken.find_by_token!(token)
+    {:ok, updated_invite} = UserInviteToken.update_invite(invite, %{used: true})
+
+    conn
+    |> json(AccountView.render("invite.json", %{invite: updated_invite}))
   end
 
   @doc "Get a password reset token (base64 string) for given nickname"
diff --git a/lib/pleroma/web/admin_api/views/account_view.ex b/lib/pleroma/web/admin_api/views/account_view.ex
index 4d6f921ef..28bb667d8 100644
--- a/lib/pleroma/web/admin_api/views/account_view.ex
+++ b/lib/pleroma/web/admin_api/views/account_view.ex
@@ -26,4 +26,22 @@ defmodule Pleroma.Web.AdminAPI.AccountView do
       "tags" => user.tags || []
     }
   end
+
+  def render("invite.json", %{invite: invite}) do
+    %{
+      "id" => invite.id,
+      "token" => invite.token,
+      "used" => invite.used,
+      "expires_at" => invite.expires_at,
+      "uses" => invite.uses,
+      "max_use" => invite.max_use,
+      "invite_type" => invite.invite_type
+    }
+  end
+
+  def render("invites.json", %{invites: invites}) do
+    %{
+      invites: render_many(invites, AccountView, "invite.json", as: :invite)
+    }
+  end
 end
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 051db6c79..7b9f0ea06 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -12,6 +12,7 @@ defmodule Pleroma.Web.CommonAPI.Utils do
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Utils
+  alias Pleroma.Web.ActivityPub.Visibility
   alias Pleroma.Web.Endpoint
   alias Pleroma.Web.MediaProxy
 
@@ -335,6 +336,24 @@ defmodule Pleroma.Web.CommonAPI.Utils do
 
   def maybe_notify_mentioned_recipients(recipients, _), do: recipients
 
+  def maybe_notify_subscribers(
+        recipients,
+        %Activity{data: %{"actor" => actor, "type" => type}} = activity
+      )
+      when type == "Create" do
+    with %User{} = user <- User.get_cached_by_ap_id(actor) do
+      subscriber_ids =
+        user
+        |> User.subscribers()
+        |> Enum.filter(&Visibility.visible_for_user?(activity, &1))
+        |> Enum.map(& &1.ap_id)
+
+      recipients ++ subscriber_ids
+    end
+  end
+
+  def maybe_notify_subscribers(recipients, _), do: recipients
+
   def maybe_extract_mentions(%{"tag" => tag}) do
     tag
     |> Enum.filter(fn x -> is_map(x) end)
diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 5462ce8be..ed082abdf 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -931,6 +931,34 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     json(conn, %{})
   end
 
+  def subscribe(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+    with %User{} = subscription_target <- User.get_cached_by_id(id),
+         {:ok, subscription_target} = User.subscribe(user, subscription_target) do
+      conn
+      |> put_view(AccountView)
+      |> render("relationship.json", %{user: user, target: subscription_target})
+    else
+      {:error, message} ->
+        conn
+        |> put_resp_content_type("application/json")
+        |> send_resp(403, Jason.encode!(%{"error" => message}))
+    end
+  end
+
+  def unsubscribe(%{assigns: %{user: user}} = conn, %{"id" => id}) do
+    with %User{} = subscription_target <- User.get_cached_by_id(id),
+         {:ok, subscription_target} = User.unsubscribe(user, subscription_target) do
+      conn
+      |> put_view(AccountView)
+      |> render("relationship.json", %{user: user, target: subscription_target})
+    else
+      {:error, message} ->
+        conn
+        |> put_resp_content_type("application/json")
+        |> send_resp(403, Jason.encode!(%{"error" => message}))
+    end
+  end
+
   def status_search(user, query) do
     fetched =
       if Regex.match?(~r/https?:/, query) do
diff --git a/lib/pleroma/web/mastodon_api/views/account_view.ex b/lib/pleroma/web/mastodon_api/views/account_view.ex
index b5f3bbb9d..af56c4149 100644
--- a/lib/pleroma/web/mastodon_api/views/account_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/account_view.ex
@@ -53,6 +53,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
       blocking: User.blocks?(user, target),
       muting: User.mutes?(user, target),
       muting_notifications: false,
+      subscribing: User.subscribed_to?(user, target),
       requested: requested,
       domain_blocking: false,
       showing_reblogs: User.showing_reblogs?(user, target),
@@ -117,13 +118,15 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
       },
 
       # Pleroma extension
-      pleroma: %{
-        confirmation_pending: user_info.confirmation_pending,
-        tags: user.tags,
-        is_moderator: user.info.is_moderator,
-        is_admin: user.info.is_admin,
-        relationship: relationship
-      }
+      pleroma:
+        %{
+          confirmation_pending: user_info.confirmation_pending,
+          tags: user.tags,
+          is_moderator: user.info.is_moderator,
+          is_admin: user.info.is_admin,
+          relationship: relationship
+        }
+        |> with_notification_settings(user, opts[:for])
     }
   end
 
@@ -132,4 +135,10 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
   end
 
   defp username_from_nickname(_), do: nil
+
+  defp with_notification_settings(data, %User{id: user_id} = user, %User{id: user_id}) do
+    Map.put(data, :notification_settings, user.info.notification_settings)
+  end
+
+  defp with_notification_settings(data, _, _), do: data
 end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index ef38fc34d..172f337db 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -168,6 +168,8 @@ defmodule Pleroma.Web.Router do
     delete("/relay", AdminAPIController, :relay_unfollow)
 
     get("/invite_token", AdminAPIController, :get_invite_token)
+    get("/invites", AdminAPIController, :invites)
+    post("/revoke_invite", AdminAPIController, :revoke_invite)
     post("/email_invite", AdminAPIController, :email_invite)
 
     get("/password_reset", AdminAPIController, :get_password_reset)
@@ -193,6 +195,7 @@ defmodule Pleroma.Web.Router do
 
       post("/change_password", UtilController, :change_password)
       post("/delete_account", UtilController, :delete_account)
+      put("/notification_settings", UtilController, :update_notificaton_settings)
     end
 
     scope [] do
@@ -336,6 +339,9 @@ defmodule Pleroma.Web.Router do
 
       post("/domain_blocks", MastodonAPIController, :block_domain)
       delete("/domain_blocks", MastodonAPIController, :unblock_domain)
+
+      post("/pleroma/accounts/:id/subscribe", MastodonAPIController, :subscribe)
+      post("/pleroma/accounts/:id/unsubscribe", MastodonAPIController, :unsubscribe)
     end
 
     scope [] do
diff --git a/lib/pleroma/web/twitter_api/controllers/util_controller.ex b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
index 26407aebd..d066d35f5 100644
--- a/lib/pleroma/web/twitter_api/controllers/util_controller.ex
+++ b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
@@ -286,12 +286,19 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     emoji =
       Emoji.get_all()
       |> Enum.map(fn {short_code, path, tags} ->
-        %{short_code => %{image_url: path, tags: String.split(tags, ",")}}
+        {short_code, %{image_url: path, tags: String.split(tags, ",")}}
       end)
+      |> Enum.into(%{})
 
     json(conn, emoji)
   end
 
+  def update_notificaton_settings(%{assigns: %{user: user}} = conn, params) do
+    with {:ok, _} <- User.update_notification_settings(user, params) do
+      json(conn, %{status: "success"})
+    end
+  end
+
   def follow_import(conn, %{"list" => %Plug.Upload{} = listfile}) do
     follow_import(conn, %{"list" => File.read!(listfile.path)})
   end
diff --git a/lib/pleroma/web/twitter_api/twitter_api.ex b/lib/pleroma/web/twitter_api/twitter_api.ex
index 9b081a316..9e9a46cf1 100644
--- a/lib/pleroma/web/twitter_api/twitter_api.ex
+++ b/lib/pleroma/web/twitter_api/twitter_api.ex
@@ -129,7 +129,7 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
   end
 
   def register_user(params) do
-    token_string = params["token"]
+    token = params["token"]
 
     params = %{
       nickname: params["nickname"],
@@ -163,36 +163,49 @@ defmodule Pleroma.Web.TwitterAPI.TwitterAPI do
       {:error, %{error: Jason.encode!(%{captcha: [error]})}}
     else
       registrations_open = Pleroma.Config.get([:instance, :registrations_open])
+      registration_process(registrations_open, params, token)
+    end
+  end
 
-      # no need to query DB if registration is open
-      token =
-        unless registrations_open || is_nil(token_string) do
-          Repo.get_by(UserInviteToken, %{token: token_string})
-        end
+  defp registration_process(registration_open, params, token)
+       when registration_open == false or is_nil(registration_open) do
+    invite =
+      unless is_nil(token) do
+        Repo.get_by(UserInviteToken, %{token: token})
+      end
 
-      cond do
-        registrations_open || (!is_nil(token) && !token.used) ->
-          changeset = User.register_changeset(%User{}, params)
+    valid_invite? = invite && UserInviteToken.valid_invite?(invite)
 
-          with {:ok, user} <- User.register(changeset) do
-            !registrations_open && UserInviteToken.mark_as_used(token.token)
+    case invite do
+      nil ->
+        {:error, "Invalid token"}
 
-            {:ok, user}
-          else
-            {:error, changeset} ->
-              errors =
-                Ecto.Changeset.traverse_errors(changeset, fn {msg, _opts} -> msg end)
-                |> Jason.encode!()
+      invite when valid_invite? ->
+        UserInviteToken.update_usage!(invite)
+        create_user(params)
 
-              {:error, %{error: errors}}
-          end
+      _ ->
+        {:error, "Expired token"}
+    end
+  end
 
-        !registrations_open && is_nil(token) ->
-          {:error, "Invalid token"}
+  defp registration_process(true, params, _token) do
+    create_user(params)
+  end
 
-        !registrations_open && token.used ->
-          {:error, "Expired token"}
-      end
+  defp create_user(params) do
+    changeset = User.register_changeset(%User{}, params)
+
+    case User.register(changeset) do
+      {:ok, user} ->
+        {:ok, user}
+
+      {:error, changeset} ->
+        errors =
+          Ecto.Changeset.traverse_errors(changeset, fn {msg, _opts} -> msg end)
+          |> Jason.encode!()
+
+        {:error, %{error: errors}}
     end
   end