Merge branch 'develop' into issue/733

43 files changed, 897 insertions, 764 deletions

diff --git a/lib/mix/tasks/pleroma/docs.ex b/lib/mix/tasks/pleroma/docs.ex
new file mode 100644
index 000000000..0d2663648
--- /dev/null
+++ b/lib/mix/tasks/pleroma/docs.ex
@@ -0,0 +1,42 @@
+defmodule Mix.Tasks.Pleroma.Docs do
+  use Mix.Task
+  import Mix.Pleroma
+
+  @shortdoc "Generates docs from descriptions.exs"
+  @moduledoc """
+  Generates docs from `descriptions.exs`.
+
+  Supports two formats: `markdown` and `json`.
+
+  ## Generate Markdown docs
+
+  `mix pleroma.docs`
+
+  ## Generate JSON docs
+
+  `mix pleroma.docs json`
+  """
+
+  def run(["json"]) do
+    do_run(Pleroma.Docs.JSON)
+  end
+
+  def run(_) do
+    do_run(Pleroma.Docs.Markdown)
+  end
+
+  defp do_run(implementation) do
+    start_pleroma()
+
+    with {descriptions, _paths} <- Mix.Config.eval!("config/description.exs"),
+         {:ok, file_path} <-
+           Pleroma.Docs.Generator.process(
+             implementation,
+             descriptions[:pleroma][:config_description]
+           ) do
+      type = if implementation == Pleroma.Docs.Markdown, do: "Markdown", else: "JSON"
+
+      Mix.shell().info([:green, "#{type} docs successfully generated to #{file_path}."])
+    end
+  end
+end
diff --git a/lib/pleroma/activity.ex b/lib/pleroma/activity.ex
index 44f1e3011..ec558168a 100644
--- a/lib/pleroma/activity.ex
+++ b/lib/pleroma/activity.ex
@@ -6,6 +6,7 @@ defmodule Pleroma.Activity do
   use Ecto.Schema
 
   alias Pleroma.Activity
+  alias Pleroma.Activity.Queries
   alias Pleroma.ActivityExpiration
   alias Pleroma.Bookmark
   alias Pleroma.Notification
@@ -65,8 +66,8 @@ defmodule Pleroma.Activity do
     timestamps()
   end
 
-  def with_joined_object(query) do
-    join(query, :inner, [activity], o in Object,
+  def with_joined_object(query, join_type \\ :inner) do
+    join(query, join_type, [activity], o in Object,
       on:
         fragment(
           "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
@@ -78,10 +79,10 @@ defmodule Pleroma.Activity do
     )
   end
 
-  def with_preloaded_object(query) do
+  def with_preloaded_object(query, join_type \\ :inner) do
     query
     |> has_named_binding?(:object)
-    |> if(do: query, else: with_joined_object(query))
+    |> if(do: query, else: with_joined_object(query, join_type))
     |> preload([activity, object: object], object: object)
   end
 
@@ -107,12 +108,9 @@ defmodule Pleroma.Activity do
   def with_set_thread_muted_field(query, _), do: query
 
   def get_by_ap_id(ap_id) do
-    Repo.one(
-      from(
-        activity in Activity,
-        where: fragment("(?)->>'id' = ?", activity.data, ^to_string(ap_id))
-      )
-    )
+    ap_id
+    |> Queries.by_ap_id()
+    |> Repo.one()
   end
 
   def get_bookmark(%Activity{} = activity, %User{} = user) do
@@ -133,21 +131,10 @@ defmodule Pleroma.Activity do
   end
 
   def get_by_ap_id_with_object(ap_id) do
-    Repo.one(
-      from(
-        activity in Activity,
-        where: fragment("(?)->>'id' = ?", activity.data, ^to_string(ap_id)),
-        left_join: o in Object,
-        on:
-          fragment(
-            "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
-            o.data,
-            activity.data,
-            activity.data
-          ),
-        preload: [object: o]
-      )
-    )
+    ap_id
+    |> Queries.by_ap_id()
+    |> with_preloaded_object(:left)
+    |> Repo.one()
   end
 
   def get_by_id(id) do
@@ -158,18 +145,9 @@ defmodule Pleroma.Activity do
   end
 
   def get_by_id_with_object(id) do
-    from(activity in Activity,
-      where: activity.id == ^id,
-      inner_join: o in Object,
-      on:
-        fragment(
-          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
-          o.data,
-          activity.data,
-          activity.data
-        ),
-      preload: [object: o]
-    )
+    Activity
+    |> where(id: ^id)
+    |> with_preloaded_object()
     |> Repo.one()
   end
 
@@ -180,51 +158,21 @@ defmodule Pleroma.Activity do
     |> Repo.all()
   end
 
-  def by_object_ap_id(ap_id) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-          activity.data,
-          activity.data,
-          ^to_string(ap_id)
-        )
-    )
-  end
-
-  def create_by_object_ap_id(ap_ids) when is_list(ap_ids) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ANY(?)",
-          activity.data,
-          activity.data,
-          ^ap_ids
-        ),
-      where: fragment("(?)->>'type' = 'Create'", activity.data)
-    )
-  end
-
-  def create_by_object_ap_id(ap_id) when is_binary(ap_id) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-          activity.data,
-          activity.data,
-          ^to_string(ap_id)
-        ),
-      where: fragment("(?)->>'type' = 'Create'", activity.data)
-    )
+  @doc """
+  Accepts `ap_id` or list of `ap_id`.
+  Returns a query.
+  """
+  @spec create_by_object_ap_id(String.t() | [String.t()]) :: Ecto.Queryable.t()
+  def create_by_object_ap_id(ap_id) do
+    ap_id
+    |> Queries.by_object_id()
+    |> Queries.by_type("Create")
   end
 
-  def create_by_object_ap_id(_), do: nil
-
   def get_all_create_by_object_ap_id(ap_id) do
-    Repo.all(create_by_object_ap_id(ap_id))
+    ap_id
+    |> create_by_object_ap_id()
+    |> Repo.all()
   end
 
   def get_create_by_object_ap_id(ap_id) when is_binary(ap_id) do
@@ -235,54 +183,17 @@ defmodule Pleroma.Activity do
 
   def get_create_by_object_ap_id(_), do: nil
 
-  def create_by_object_ap_id_with_object(ap_ids) when is_list(ap_ids) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ANY(?)",
-          activity.data,
-          activity.data,
-          ^ap_ids
-        ),
-      where: fragment("(?)->>'type' = 'Create'", activity.data),
-      inner_join: o in Object,
-      on:
-        fragment(
-          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
-          o.data,
-          activity.data,
-          activity.data
-        ),
-      preload: [object: o]
-    )
-  end
-
-  def create_by_object_ap_id_with_object(ap_id) when is_binary(ap_id) do
-    from(
-      activity in Activity,
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-          activity.data,
-          activity.data,
-          ^to_string(ap_id)
-        ),
-      where: fragment("(?)->>'type' = 'Create'", activity.data),
-      inner_join: o in Object,
-      on:
-        fragment(
-          "(?->>'id') = COALESCE(?->'object'->>'id', ?->>'object')",
-          o.data,
-          activity.data,
-          activity.data
-        ),
-      preload: [object: o]
-    )
+  @doc """
+  Accepts `ap_id` or list of `ap_id`.
+  Returns a query.
+  """
+  @spec create_by_object_ap_id_with_object(String.t() | [String.t()]) :: Ecto.Queryable.t()
+  def create_by_object_ap_id_with_object(ap_id) do
+    ap_id
+    |> create_by_object_ap_id()
+    |> with_preloaded_object()
   end
 
-  def create_by_object_ap_id_with_object(_), do: nil
-
   def get_create_by_object_ap_id_with_object(ap_id) when is_binary(ap_id) do
     ap_id
     |> create_by_object_ap_id_with_object()
@@ -306,7 +217,8 @@ defmodule Pleroma.Activity do
   def normalize(_), do: nil
 
   def delete_by_ap_id(id) when is_binary(id) do
-    by_object_ap_id(id)
+    id
+    |> Queries.by_object_id()
     |> select([u], u)
     |> Repo.delete_all()
     |> elem(1)
@@ -350,31 +262,10 @@ defmodule Pleroma.Activity do
   end
 
   def follow_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
-    from(
-      a in Activity,
-      where:
-        fragment(
-          "? ->> 'type' = 'Follow'",
-          a.data
-        ),
-      where:
-        fragment(
-          "? ->> 'state' = 'pending'",
-          a.data
-        ),
-      where:
-        fragment(
-          "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-          a.data,
-          a.data,
-          ^ap_id
-        )
-    )
-  end
-
-  @spec query_by_actor(actor()) :: Ecto.Query.t()
-  def query_by_actor(actor) do
-    from(a in Activity, where: a.actor == ^actor)
+    ap_id
+    |> Queries.by_object_id()
+    |> Queries.by_type("Follow")
+    |> where([a], fragment("? ->> 'state' = 'pending'", a.data))
   end
 
   def restrict_deactivated_users(query) do
diff --git a/lib/pleroma/activity/queries.ex b/lib/pleroma/activity/queries.ex
index aa5b29566..13fa33831 100644
--- a/lib/pleroma/activity/queries.ex
+++ b/lib/pleroma/activity/queries.ex
@@ -13,6 +13,14 @@ defmodule Pleroma.Activity.Queries do
 
   alias Pleroma.Activity
 
+  @spec by_ap_id(query, String.t()) :: query
+  def by_ap_id(query \\ Activity, ap_id) do
+    from(
+      activity in query,
+      where: fragment("(?)->>'id' = ?", activity.data, ^to_string(ap_id))
+    )
+  end
+
   @spec by_actor(query, String.t()) :: query
   def by_actor(query \\ Activity, actor) do
     from(
@@ -21,8 +29,23 @@ defmodule Pleroma.Activity.Queries do
     )
   end
 
-  @spec by_object_id(query, String.t()) :: query
-  def by_object_id(query \\ Activity, object_id) do
+  @spec by_object_id(query, String.t() | [String.t()]) :: query
+  def by_object_id(query \\ Activity, object_id)
+
+  def by_object_id(query, object_ids) when is_list(object_ids) do
+    from(
+      activity in query,
+      where:
+        fragment(
+          "coalesce((?)->'object'->>'id', (?)->>'object') = ANY(?)",
+          activity.data,
+          activity.data,
+          ^object_ids
+        )
+    )
+  end
+
+  def by_object_id(query, object_id) when is_binary(object_id) do
     from(activity in query,
       where:
         fragment(
@@ -41,9 +64,4 @@ defmodule Pleroma.Activity.Queries do
       where: fragment("(?)->>'type' = ?", activity.data, ^activity_type)
     )
   end
-
-  @spec limit(query, pos_integer()) :: query
-  def limit(query \\ Activity, limit) do
-    from(activity in query, limit: ^limit)
-  end
 end
diff --git a/lib/pleroma/application.ex b/lib/pleroma/application.ex
index 1d46925f8..49094704b 100644
--- a/lib/pleroma/application.ex
+++ b/lib/pleroma/application.ex
@@ -31,18 +31,19 @@ defmodule Pleroma.Application do
     children =
       [
         Pleroma.Repo,
+        Pleroma.Scheduler,
         Pleroma.Config.TransferTask,
         Pleroma.Emoji,
         Pleroma.Captcha,
         Pleroma.FlakeId,
-        Pleroma.ScheduledActivityWorker,
-        Pleroma.ActivityExpirationWorker
+        Pleroma.Daemons.ScheduledActivityDaemon,
+        Pleroma.Daemons.ActivityExpirationDaemon
       ] ++
         cachex_children() ++
         hackney_pool_children() ++
         [
-          Pleroma.Web.Federator.RetryQueue,
           Pleroma.Stats,
+          {Oban, Pleroma.Config.get(Oban)},
           %{
             id: :web_push_init,
             start: {Task, :start_link, [&Pleroma.Web.Push.init/0]},
@@ -70,9 +71,7 @@ defmodule Pleroma.Application do
     # See http://elixir-lang.org/docs/stable/elixir/Supervisor.html
     # for other strategies and supported options
     opts = [strategy: :one_for_one, name: Pleroma.Supervisor]
-    result = Supervisor.start_link(children, opts)
-    :ok = after_supervisor_start()
-    result
+    Supervisor.start_link(children, opts)
   end
 
   defp setup_instrumenters do
@@ -164,17 +163,4 @@ defmodule Pleroma.Application do
       :hackney_pool.child_spec(pool, options)
     end
   end
-
-  defp after_supervisor_start do
-    with digest_config <- Application.get_env(:pleroma, :email_notifications)[:digest],
-         true <- digest_config[:active] do
-      PleromaJobQueue.schedule(
-        digest_config[:schedule],
-        :digest_emails,
-        Pleroma.DigestEmailWorker
-      )
-    end
-
-    :ok
-  end
 end
diff --git a/lib/pleroma/activity_expiration_worker.ex b/lib/pleroma/daemons/activity_expiration_daemon.ex
index 0f9e715f8..cab7628c4 100644
--- a/lib/pleroma/activity_expiration_worker.ex
+++ b/lib/pleroma/daemons/activity_expiration_daemon.ex
@@ -2,13 +2,14 @@
 # Copyright © 2019 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.ActivityExpirationWorker do
+defmodule Pleroma.Daemons.ActivityExpirationDaemon do
   alias Pleroma.Activity
   alias Pleroma.ActivityExpiration
   alias Pleroma.Config
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.CommonAPI
+
   require Logger
   use GenServer
   import Ecto.Query
@@ -49,7 +50,10 @@ defmodule Pleroma.ActivityExpirationWorker do
   def handle_info(:perform, state) do
     ActivityExpiration.due_expirations(@schedule_interval)
     |> Enum.each(fn expiration ->
-      PleromaJobQueue.enqueue(:activity_expiration, __MODULE__, [:execute, expiration.id])
+      Pleroma.Workers.ActivityExpirationWorker.enqueue(
+        "activity_expiration",
+        %{"activity_expiration_id" => expiration.id}
+      )
     end)
 
     schedule_next()
diff --git a/lib/pleroma/digest_email_worker.ex b/lib/pleroma/daemons/digest_email_daemon.ex
index 5644d6a67..462ad2c55 100644
--- a/lib/pleroma/digest_email_worker.ex
+++ b/lib/pleroma/daemons/digest_email_daemon.ex
@@ -2,10 +2,11 @@
 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.DigestEmailWorker do
-  import Ecto.Query
+defmodule Pleroma.Daemons.DigestEmailDaemon do
+  alias Pleroma.Repo
+  alias Pleroma.Workers.DigestEmailsWorker
 
-  @queue_name :digest_emails
+  import Ecto.Query
 
   def perform do
     config = Pleroma.Config.get([:email_notifications, :digest])
@@ -20,8 +21,10 @@ defmodule Pleroma.DigestEmailWorker do
       where: u.last_digest_emailed_at < datetime_add(^now, ^negative_interval, "day"),
       select: u
     )
-    |> Pleroma.Repo.all()
-    |> Enum.each(&PleromaJobQueue.enqueue(@queue_name, __MODULE__, [&1]))
+    |> Repo.all()
+    |> Enum.each(fn user ->
+      DigestEmailsWorker.enqueue("digest_email", %{"user_id" => user.id})
+    end)
   end
 
   @doc """
diff --git a/lib/pleroma/scheduled_activity_worker.ex b/lib/pleroma/daemons/scheduled_activity_daemon.ex
index 8578cab5e..aee5f723a 100644
--- a/lib/pleroma/scheduled_activity_worker.ex
+++ b/lib/pleroma/daemons/scheduled_activity_daemon.ex
@@ -2,7 +2,7 @@
 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.ScheduledActivityWorker do
+defmodule Pleroma.Daemons.ScheduledActivityDaemon do
   @moduledoc """
   Sends scheduled activities to the job queue.
   """
@@ -11,6 +11,7 @@ defmodule Pleroma.ScheduledActivityWorker do
   alias Pleroma.ScheduledActivity
   alias Pleroma.User
   alias Pleroma.Web.CommonAPI
+
   use GenServer
   require Logger
 
@@ -45,7 +46,10 @@ defmodule Pleroma.ScheduledActivityWorker do
   def handle_info(:perform, state) do
     ScheduledActivity.due_activities(@schedule_interval)
     |> Enum.each(fn scheduled_activity ->
-      PleromaJobQueue.enqueue(:scheduled_activities, __MODULE__, [:execute, scheduled_activity.id])
+      Pleroma.Workers.ScheduledActivityWorker.enqueue(
+        "execute",
+        %{"activity_id" => scheduled_activity.id}
+      )
     end)
 
     schedule_next()
diff --git a/lib/pleroma/docs/generator.ex b/lib/pleroma/docs/generator.ex
new file mode 100644
index 000000000..aa578eee2
--- /dev/null
+++ b/lib/pleroma/docs/generator.ex
@@ -0,0 +1,73 @@
+defmodule Pleroma.Docs.Generator do
+  @callback process(keyword()) :: {:ok, String.t()}
+
+  @spec process(module(), keyword()) :: {:ok, String.t()}
+  def process(implementation, descriptions) do
+    implementation.process(descriptions)
+  end
+
+  @spec uploaders_list() :: [module()]
+  def uploaders_list do
+    {:ok, modules} = :application.get_key(:pleroma, :modules)
+
+    Enum.filter(modules, fn module ->
+      name_as_list = Module.split(module)
+
+      List.starts_with?(name_as_list, ["Pleroma", "Uploaders"]) and
+        List.last(name_as_list) != "Uploader"
+    end)
+  end
+
+  @spec filters_list() :: [module()]
+  def filters_list do
+    {:ok, modules} = :application.get_key(:pleroma, :modules)
+
+    Enum.filter(modules, fn module ->
+      name_as_list = Module.split(module)
+
+      List.starts_with?(name_as_list, ["Pleroma", "Upload", "Filter"])
+    end)
+  end
+
+  @spec mrf_list() :: [module()]
+  def mrf_list do
+    {:ok, modules} = :application.get_key(:pleroma, :modules)
+
+    Enum.filter(modules, fn module ->
+      name_as_list = Module.split(module)
+
+      List.starts_with?(name_as_list, ["Pleroma", "Web", "ActivityPub", "MRF"]) and
+        length(name_as_list) > 4
+    end)
+  end
+
+  @spec richmedia_parsers() :: [module()]
+  def richmedia_parsers do
+    {:ok, modules} = :application.get_key(:pleroma, :modules)
+
+    Enum.filter(modules, fn module ->
+      name_as_list = Module.split(module)
+
+      List.starts_with?(name_as_list, ["Pleroma", "Web", "RichMedia", "Parsers"]) and
+        length(name_as_list) == 5
+    end)
+  end
+end
+
+defimpl Jason.Encoder, for: Tuple do
+  def encode(tuple, opts) do
+    Jason.Encode.list(Tuple.to_list(tuple), opts)
+  end
+end
+
+defimpl Jason.Encoder, for: [Regex, Function] do
+  def encode(term, opts) do
+    Jason.Encode.string(inspect(term), opts)
+  end
+end
+
+defimpl String.Chars, for: Regex do
+  def to_string(term) do
+    inspect(term)
+  end
+end
diff --git a/lib/pleroma/docs/json.ex b/lib/pleroma/docs/json.ex
new file mode 100644
index 000000000..18ba01d58
--- /dev/null
+++ b/lib/pleroma/docs/json.ex
@@ -0,0 +1,20 @@
+defmodule Pleroma.Docs.JSON do
+  @behaviour Pleroma.Docs.Generator
+
+  @spec process(keyword()) :: {:ok, String.t()}
+  def process(descriptions) do
+    config_path = "docs/generate_config.json"
+
+    with {:ok, file} <- File.open(config_path, [:write]),
+         json <- generate_json(descriptions),
+         :ok <- IO.write(file, json),
+         :ok <- File.close(file) do
+      {:ok, config_path}
+    end
+  end
+
+  @spec generate_json([keyword()]) :: String.t()
+  def generate_json(descriptions) do
+    Jason.encode!(descriptions)
+  end
+end
diff --git a/lib/pleroma/docs/markdown.ex b/lib/pleroma/docs/markdown.ex
new file mode 100644
index 000000000..8386dc2fb
--- /dev/null
+++ b/lib/pleroma/docs/markdown.ex
@@ -0,0 +1,78 @@
+defmodule Pleroma.Docs.Markdown do
+  @behaviour Pleroma.Docs.Generator
+
+  @spec process(keyword()) :: {:ok, String.t()}
+  def process(descriptions) do
+    config_path = "docs/generated_config.md"
+    {:ok, file} = File.open(config_path, [:utf8, :write])
+    IO.write(file, "# Generated configuration\n")
+    IO.write(file, "Date of generation: #{Date.utc_today()}\n\n")
+
+    IO.write(
+      file,
+      "This file describe the configuration, it is recommended to edit the relevant `*.secret.exs` file instead of the others founds in the ``config`` directory.\n\n" <>
+        "If you run Pleroma with ``MIX_ENV=prod`` the file is ``prod.secret.exs``, otherwise it is ``dev.secret.exs``.\n\n"
+    )
+
+    for group <- descriptions do
+      if is_nil(group[:key]) do
+        IO.write(file, "## #{inspect(group[:group])}\n")
+      else
+        IO.write(file, "## #{inspect(group[:key])}\n")
+      end
+
+      IO.write(file, "#{group[:description]}\n")
+
+      for child <- group[:children] do
+        print_child_header(file, child)
+
+        print_suggestions(file, child[:suggestions])
+
+        if child[:children] do
+          for subchild <- child[:children] do
+            print_child_header(file, subchild)
+
+            print_suggestions(file, subchild[:suggestions])
+          end
+        end
+      end
+
+      IO.write(file, "\n")
+    end
+
+    :ok = File.close(file)
+    {:ok, config_path}
+  end
+
+  defp print_suggestion(file, suggestion) when is_list(suggestion) do
+    IO.write(file, "  `#{inspect(suggestion)}`\n")
+  end
+
+  defp print_suggestion(file, suggestion) when is_function(suggestion) do
+    IO.write(file, "  `#{inspect(suggestion.())}`\n")
+  end
+
+  defp print_suggestion(file, suggestion, as_list \\ false) do
+    list_mark = if as_list, do: "- ", else: ""
+    IO.write(file, "  #{list_mark}`#{inspect(suggestion)}`\n")
+  end
+
+  defp print_suggestions(_file, nil), do: nil
+
+  defp print_suggestions(file, suggestions) do
+    IO.write(file, "Suggestions:\n")
+
+    if length(suggestions) > 1 do
+      for suggestion <- suggestions do
+        print_suggestion(file, suggestion, true)
+      end
+    else
+      print_suggestion(file, List.first(suggestions))
+    end
+  end
+
+  defp print_child_header(file, child) do
+    IO.write(file, "- `#{inspect(child[:key])}` -`#{inspect(child[:type])}`  \n")
+    IO.write(file, "#{child[:description]}  \n")
+  end
+end
diff --git a/lib/pleroma/emails/mailer.ex b/lib/pleroma/emails/mailer.ex
index 2e4657b7c..eb96f2e8b 100644
--- a/lib/pleroma/emails/mailer.ex
+++ b/lib/pleroma/emails/mailer.ex
@@ -9,6 +9,7 @@ defmodule Pleroma.Emails.Mailer do
   The module contains functions to delivery email using Swoosh.Mailer.
   """
 
+  alias Pleroma.Workers.MailerWorker
   alias Swoosh.DeliveryError
 
   @otp_app :pleroma
@@ -19,7 +20,12 @@ defmodule Pleroma.Emails.Mailer do
 
   @doc "add email to queue"
   def deliver_async(email, config \\ []) do
-    PleromaJobQueue.enqueue(:mailer, __MODULE__, [:deliver_async, email, config])
+    encoded_email =
+      email
+      |> :erlang.term_to_binary()
+      |> Base.encode64()
+
+    MailerWorker.enqueue("email", %{"encoded_email" => encoded_email, "config" => config})
   end
 
   @doc "callback to perform send email from queue"
diff --git a/lib/pleroma/instances/instance.ex b/lib/pleroma/instances/instance.ex
index 4d7ed4ca1..544c4b687 100644
--- a/lib/pleroma/instances/instance.ex
+++ b/lib/pleroma/instances/instance.ex
@@ -90,7 +90,7 @@ defmodule Pleroma.Instances.Instance do
   def set_unreachable(url_or_host, unreachable_since \\ nil)
 
   def set_unreachable(url_or_host, unreachable_since) when is_binary(url_or_host) do
-    unreachable_since = unreachable_since || DateTime.utc_now()
+    unreachable_since = parse_datetime(unreachable_since) || NaiveDateTime.utc_now()
     host = host(url_or_host)
     existing_record = Repo.get_by(Instance, %{host: host})
 
@@ -114,4 +114,10 @@ defmodule Pleroma.Instances.Instance do
   end
 
   def set_unreachable(_, _), do: {:error, nil}
+
+  defp parse_datetime(datetime) when is_binary(datetime) do
+    NaiveDateTime.from_iso8601(datetime)
+  end
+
+  defp parse_datetime(datetime), do: datetime
 end
diff --git a/lib/pleroma/scheduler.ex b/lib/pleroma/scheduler.ex
new file mode 100644
index 000000000..d84cd99ad
--- /dev/null
+++ b/lib/pleroma/scheduler.ex
@@ -0,0 +1,7 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Scheduler do
+  use Quantum.Scheduler, otp_app: :pleroma
+end
diff --git a/lib/pleroma/user.ex b/lib/pleroma/user.ex
index 3aa245f2a..f0306652c 100644
--- a/lib/pleroma/user.ex
+++ b/lib/pleroma/user.ex
@@ -27,6 +27,7 @@ defmodule Pleroma.User do
   alias Pleroma.Web.OStatus
   alias Pleroma.Web.RelMe
   alias Pleroma.Web.Websub
+  alias Pleroma.Workers.BackgroundWorker
 
   require Logger
 
@@ -174,11 +175,25 @@ defmodule Pleroma.User do
     |> Repo.aggregate(:count, :id)
   end
 
+  defp truncate_if_exists(params, key, max_length) do
+    if Map.has_key?(params, key) and is_binary(params[key]) do
+      {value, _chopped} = String.split_at(params[key], max_length)
+      Map.put(params, key, value)
+    else
+      params
+    end
+  end
+
   def remote_user_creation(params) do
     bio_limit = Pleroma.Config.get([:instance, :user_bio_length], 5000)
     name_limit = Pleroma.Config.get([:instance, :user_name_length], 100)
 
-    params = Map.put(params, :info, params[:info] || %{})
+    params =
+      params
+      |> Map.put(:info, params[:info] || %{})
+      |> truncate_if_exists(:name, name_limit)
+      |> truncate_if_exists(:bio, bio_limit)
+
     info_cng = User.Info.remote_user_creation(%User.Info{}, params[:info])
 
     changes =
@@ -633,8 +648,9 @@ defmodule Pleroma.User do
   end
 
   @doc "Fetch some posts when the user has just been federated with"
-  def fetch_initial_posts(user),
-    do: PleromaJobQueue.enqueue(:background, __MODULE__, [:fetch_initial_posts, user])
+  def fetch_initial_posts(user) do
+    BackgroundWorker.enqueue("fetch_initial_posts", %{"user_id" => user.id})
+  end
 
   @spec get_followers_query(User.t(), pos_integer() | nil) :: Ecto.Query.t()
   def get_followers_query(%User{} = user, nil) do
@@ -1064,7 +1080,7 @@ defmodule Pleroma.User do
   end
 
   def deactivate_async(user, status \\ true) do
-    PleromaJobQueue.enqueue(:background, __MODULE__, [:deactivate_async, user, status])
+    BackgroundWorker.enqueue("deactivate_user", %{"user_id" => user.id, "status" => status})
   end
 
   def deactivate(%User{} = user, status \\ true) do
@@ -1092,9 +1108,9 @@ defmodule Pleroma.User do
     |> update_and_set_cache()
   end
 
-  @spec delete(User.t()) :: :ok
-  def delete(%User{} = user),
-    do: PleromaJobQueue.enqueue(:background, __MODULE__, [:delete, user])
+  def delete(%User{} = user) do
+    BackgroundWorker.enqueue("delete_user", %{"user_id" => user.id})
+  end
 
   @spec perform(atom(), User.t()) :: {:ok, User.t()}
   def perform(:delete, %User{} = user) do
@@ -1201,25 +1217,24 @@ defmodule Pleroma.User do
     Repo.all(query)
   end
 
-  def blocks_import(%User{} = blocker, blocked_identifiers) when is_list(blocked_identifiers),
-    do:
-      PleromaJobQueue.enqueue(:background, __MODULE__, [
-        :blocks_import,
-        blocker,
-        blocked_identifiers
-      ])
+  def blocks_import(%User{} = blocker, blocked_identifiers) when is_list(blocked_identifiers) do
+    BackgroundWorker.enqueue("blocks_import", %{
+      "blocker_id" => blocker.id,
+      "blocked_identifiers" => blocked_identifiers
+    })
+  end
 
-  def follow_import(%User{} = follower, followed_identifiers) when is_list(followed_identifiers),
-    do:
-      PleromaJobQueue.enqueue(:background, __MODULE__, [
-        :follow_import,
-        follower,
-        followed_identifiers
-      ])
+  def follow_import(%User{} = follower, followed_identifiers)
+      when is_list(followed_identifiers) do
+    BackgroundWorker.enqueue("follow_import", %{
+      "follower_id" => follower.id,
+      "followed_identifiers" => followed_identifiers
+    })
+  end
 
   def delete_user_activities(%User{ap_id: ap_id} = user) do
     ap_id
-    |> Activity.query_by_actor()
+    |> Activity.Queries.by_actor()
     |> RepoStreamer.chunk_stream(50)
     |> Stream.each(fn activities ->
       Enum.each(activities, &delete_activity(&1))
@@ -1624,4 +1639,13 @@ defmodule Pleroma.User do
   def is_internal_user?(%User{nickname: nil}), do: true
   def is_internal_user?(%User{local: true, nickname: "internal." <> _}), do: true
   def is_internal_user?(_), do: false
+
+  def change_email(user, email) do
+    user
+    |> cast(%{email: email}, [:email])
+    |> validate_required([:email])
+    |> unique_constraint(:email)
+    |> validate_format(:email, @email_regex)
+    |> update_and_set_cache()
+  end
 end
diff --git a/lib/pleroma/user/info.ex b/lib/pleroma/user/info.ex
index 779bfbc18..151e025de 100644
--- a/lib/pleroma/user/info.ex
+++ b/lib/pleroma/user/info.ex
@@ -242,6 +242,13 @@ defmodule Pleroma.User.Info do
   end
 
   def remote_user_creation(info, params) do
+    params =
+      if Map.has_key?(params, :fields) do
+        Map.put(params, :fields, Enum.map(params[:fields], &truncate_field/1))
+      else
+        params
+      end
+
     info
     |> cast(params, [
       :ap_enabled,
@@ -326,6 +333,16 @@ defmodule Pleroma.User.Info do
 
   defp valid_field?(_), do: false
 
+  defp truncate_field(%{"name" => name, "value" => value}) do
+    {name, _chopped} =
+      String.split_at(name, Pleroma.Config.get([:instance, :account_field_name_length], 255))
+
+    {value, _chopped} =
+      String.split_at(value, Pleroma.Config.get([:instance, :account_field_value_length], 255))
+
+    %{"name" => name, "value" => value}
+  end
+
   @spec confirmation_changeset(Info.t(), keyword()) :: Changeset.t()
   def confirmation_changeset(info, opts) do
     need_confirmation? = Keyword.get(opts, :need_confirmation)
diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex
index d23ec66ac..41f6a0f1f 100644
--- a/lib/pleroma/web/activity_pub/activity_pub.ex
+++ b/lib/pleroma/web/activity_pub/activity_pub.ex
@@ -17,6 +17,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Web.ActivityPub.MRF
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.WebFinger
+  alias Pleroma.Workers.BackgroundWorker
 
   import Ecto.Query
   import Pleroma.Web.ActivityPub.Utils
@@ -145,7 +146,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
           activity
         end
 
-      PleromaJobQueue.enqueue(:background, Pleroma.Web.RichMedia.Helpers, [:fetch, activity])
+      BackgroundWorker.enqueue("fetch_data_for_activity", %{"activity_id" => activity.id})
 
       Notification.create_notifications(activity)
 
diff --git a/lib/pleroma/web/activity_pub/mrf/mediaproxy_warming_policy.ex b/lib/pleroma/web/activity_pub/mrf/mediaproxy_warming_policy.ex
index a179dd54d..26b8539fe 100644
--- a/lib/pleroma/web/activity_pub/mrf/mediaproxy_warming_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/mediaproxy_warming_policy.ex
@@ -8,6 +8,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy do
 
   alias Pleroma.HTTP
   alias Pleroma.Web.MediaProxy
+  alias Pleroma.Workers.BackgroundWorker
 
   require Logger
 
@@ -30,7 +31,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy do
         url
         |> Enum.each(fn
           %{"href" => href} ->
-            PleromaJobQueue.enqueue(:background, __MODULE__, [:prefetch, href])
+            BackgroundWorker.enqueue("media_proxy_prefetch", %{"url" => href})
 
           x ->
             Logger.debug("Unhandled attachment URL object #{inspect(x)}")
@@ -46,7 +47,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy do
         %{"type" => "Create", "object" => %{"attachment" => attachments} = _object} = message
       )
       when is_list(attachments) and length(attachments) > 0 do
-    PleromaJobQueue.enqueue(:background, __MODULE__, [:preload, message])
+    BackgroundWorker.enqueue("media_proxy_preload", %{"message" => message})
 
     {:ok, message}
   end
diff --git a/lib/pleroma/web/activity_pub/publisher.ex b/lib/pleroma/web/activity_pub/publisher.ex
index c97405690..a6322e25a 100644
--- a/lib/pleroma/web/activity_pub/publisher.ex
+++ b/lib/pleroma/web/activity_pub/publisher.ex
@@ -84,6 +84,15 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
     end
   end
 
+  def publish_one(%{actor_id: actor_id} = params) do
+    actor = User.get_cached_by_id(actor_id)
+
+    params
+    |> Map.delete(:actor_id)
+    |> Map.put(:actor, actor)
+    |> publish_one()
+  end
+
   defp should_federate?(inbox, public) do
     if public do
       true
@@ -159,7 +168,8 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
   Publishes an activity with BCC to all relevant peers.
   """
 
-  def publish(actor, %{data: %{"bcc" => bcc}} = activity) when is_list(bcc) and bcc != [] do
+  def publish(%User{} = actor, %{data: %{"bcc" => bcc}} = activity)
+      when is_list(bcc) and bcc != [] do
     public = is_public?(activity)
     {:ok, data} = Transmogrifier.prepare_outgoing(activity.data)
 
@@ -186,7 +196,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
       Pleroma.Web.Federator.Publisher.enqueue_one(__MODULE__, %{
         inbox: inbox,
         json: json,
-        actor: actor,
+        actor_id: actor.id,
         id: activity.data["id"],
         unreachable_since: unreachable_since
       })
@@ -221,7 +231,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
         %{
           inbox: inbox,
           json: json,
-          actor: actor,
+          actor_id: actor.id,
           id: activity.data["id"],
           unreachable_since: unreachable_since
         }
diff --git a/lib/pleroma/web/activity_pub/transmogrifier.ex b/lib/pleroma/web/activity_pub/transmogrifier.ex
index acd61bda3..2fbb16623 100644
--- a/lib/pleroma/web/activity_pub/transmogrifier.ex
+++ b/lib/pleroma/web/activity_pub/transmogrifier.ex
@@ -15,6 +15,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.ActivityPub.Visibility
   alias Pleroma.Web.Federator
+  alias Pleroma.Workers.TransmogrifierWorker
 
   import Ecto.Query
 
@@ -185,12 +186,12 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
             |> Map.put("context", replied_object.data["context"] || object["conversation"])
           else
             e ->
-              Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
+              Logger.error("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
               object
           end
 
         e ->
-          Logger.error("Couldn't fetch \"#{inspect(in_reply_to_id)}\", error: #{inspect(e)}")
+          Logger.error("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
           object
       end
     else
@@ -1051,7 +1052,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
          already_ap <- User.ap_enabled?(user),
          {:ok, user} <- upgrade_user(user, data) do
       if not already_ap do
-        PleromaJobQueue.enqueue(:transmogrifier, __MODULE__, [:user_upgrade, user])
+        TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
       end
 
       {:ok, user}
diff --git a/lib/pleroma/web/activity_pub/utils.ex b/lib/pleroma/web/activity_pub/utils.ex
index c9c0c3763..258e56066 100644
--- a/lib/pleroma/web/activity_pub/utils.ex
+++ b/lib/pleroma/web/activity_pub/utils.ex
@@ -85,15 +85,13 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   defp extract_list(_), do: []
 
   def maybe_splice_recipient(ap_id, params) do
-    need_splice =
+    need_splice? =
       !recipient_in_collection(ap_id, params["to"]) &&
         !recipient_in_collection(ap_id, params["cc"])
 
-    cc_list = extract_list(params["cc"])
-
-    if need_splice do
-      params
-      |> Map.put("cc", [ap_id | cc_list])
+    if need_splice? do
+      cc_list = extract_list(params["cc"])
+      Map.put(params, "cc", [ap_id | cc_list])
     else
       params
     end
@@ -139,7 +137,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
       "object" => object
     }
 
-    Notification.get_notified_from_activity(%Activity{data: fake_create_activity}, false)
+    get_notified_from_object(fake_create_activity)
   end
 
   def get_notified_from_object(object) do
@@ -169,14 +167,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   @spec maybe_federate(any()) :: :ok
   def maybe_federate(%Activity{local: true} = activity) do
     if Pleroma.Config.get!([:instance, :federating]) do
-      priority =
-        case activity.data["type"] do
-          "Delete" -> 10
-          "Create" -> 1
-          _ -> 5
-        end
-
-      Pleroma.Web.Federator.publish(activity, priority)
+      Pleroma.Web.Federator.publish(activity)
     end
 
     :ok
@@ -188,9 +179,9 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   Adds an id and a published data if they aren't there,
   also adds it to an included object
   """
-  def lazy_put_activity_defaults(map, fake \\ false) do
+  def lazy_put_activity_defaults(map, fake? \\ false) do
     map =
-      unless fake do
+      if not fake? do
         %{data: %{"id" => context}, id: context_id} = create_context(map["context"])
 
         map
@@ -207,7 +198,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
       end
 
     if is_map(map["object"]) do
-      object = lazy_put_object_defaults(map["object"], map, fake)
+      object = lazy_put_object_defaults(map["object"], map, fake?)
       %{map | "object" => object}
     else
       map
@@ -217,9 +208,9 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   @doc """
   Adds an id and published date if they aren't there.
   """
-  def lazy_put_object_defaults(map, activity \\ %{}, fake)
+  def lazy_put_object_defaults(map, activity \\ %{}, fake?)
 
-  def lazy_put_object_defaults(map, activity, true = _fake) do
+  def lazy_put_object_defaults(map, activity, true = _fake?) do
     map
     |> Map.put_new_lazy("published", &make_date/0)
     |> Map.put_new("id", "pleroma:fake_object_id")
@@ -228,7 +219,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     |> Map.put_new("context_id", activity["context_id"])
   end
 
-  def lazy_put_object_defaults(map, activity, _fake) do
+  def lazy_put_object_defaults(map, activity, _fake?) do
     map
     |> Map.put_new_lazy("id", &generate_object_id/0)
     |> Map.put_new_lazy("published", &make_date/0)
@@ -242,9 +233,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   def insert_full_object(%{"object" => %{"type" => type} = object_data} = map)
       when is_map(object_data) and type in @supported_object_types do
     with {:ok, object} <- Object.create(object_data) do
-      map =
-        map
-        |> Map.put("object", object.data["id"])
+      map = Map.put(map, "object", object.data["id"])
 
       {:ok, map, object}
     end
@@ -263,7 +252,7 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     |> Activity.Queries.by_actor()
     |> Activity.Queries.by_object_id(id)
     |> Activity.Queries.by_type("Like")
-    |> Activity.Queries.limit(1)
+    |> limit(1)
     |> Repo.one()
   end
 
@@ -380,12 +369,11 @@ defmodule Pleroma.Web.ActivityPub.Utils do
         %Activity{data: %{"actor" => actor, "object" => object}} = activity,
         state
       ) do
-    with new_data <-
-           activity.data
-           |> Map.put("state", state),
-         changeset <- Changeset.change(activity, data: new_data),
-         {:ok, activity} <- Repo.update(changeset),
-         _ <- User.set_follow_state_cache(actor, object, state) do
+    new_data = Map.put(activity.data, "state", state)
+    changeset = Changeset.change(activity, data: new_data)
+
+    with {:ok, activity} <- Repo.update(changeset) do
+      User.set_follow_state_cache(actor, object, state)
       {:ok, activity}
     end
   end
@@ -410,28 +398,14 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def fetch_latest_follow(%User{ap_id: follower_id}, %User{ap_id: followed_id}) do
-    query =
-      from(
-        activity in Activity,
-        where:
-          fragment(
-            "? ->> 'type' = 'Follow'",
-            activity.data
-          ),
-        where: activity.actor == ^follower_id,
-        # this is to use the index
-        where:
-          fragment(
-            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-            activity.data,
-            activity.data,
-            ^followed_id
-          ),
-        order_by: [fragment("? desc nulls last", activity.id)],
-        limit: 1
-      )
-
-    Repo.one(query)
+    "Follow"
+    |> Activity.Queries.by_type()
+    |> where(actor: ^follower_id)
+    # this is to use the index
+    |> Activity.Queries.by_object_id(followed_id)
+    |> order_by([activity], fragment("? desc nulls last", activity.id))
+    |> limit(1)
+    |> Repo.one()
   end
 
   #### Announce-related helpers
@@ -439,23 +413,13 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   @doc """
   Retruns an existing announce activity if the notice has already been announced
   """
-  def get_existing_announce(actor, %{data: %{"id" => id}}) do
-    query =
-      from(
-        activity in Activity,
-        where: activity.actor == ^actor,
-        # this is to use the index
-        where:
-          fragment(
-            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-            activity.data,
-            activity.data,
-            ^id
-          ),
-        where: fragment("(?)->>'type' = 'Announce'", activity.data)
-      )
-
-    Repo.one(query)
+  def get_existing_announce(actor, %{data: %{"id" => ap_id}}) do
+    "Announce"
+    |> Activity.Queries.by_type()
+    |> where(actor: ^actor)
+    # this is to use the index
+    |> Activity.Queries.by_object_id(ap_id)
+    |> Repo.one()
   end
 
   @doc """
@@ -538,11 +502,13 @@ defmodule Pleroma.Web.ActivityPub.Utils do
         object
       ) do
     announcements =
-      if is_list(object.data["announcements"]), do: object.data["announcements"], else: []
+      if is_list(object.data["announcements"]) do
+        Enum.uniq([actor | object.data["announcements"]])
+      else
+        [actor]
+      end
 
-    with announcements <- [actor | announcements] |> Enum.uniq() do
-      update_element_in_object("announcement", announcements, object)
-    end
+    update_element_in_object("announcement", announcements, object)
   end
 
   def add_announce_to_object(_, object), do: {:ok, object}
@@ -570,28 +536,14 @@ defmodule Pleroma.Web.ActivityPub.Utils do
 
   #### Block-related helpers
   def fetch_latest_block(%User{ap_id: blocker_id}, %User{ap_id: blocked_id}) do
-    query =
-      from(
-        activity in Activity,
-        where:
-          fragment(
-            "? ->> 'type' = 'Block'",
-            activity.data
-          ),
-        where: activity.actor == ^blocker_id,
-        # this is to use the index
-        where:
-          fragment(
-            "coalesce((?)->'object'->>'id', (?)->>'object') = ?",
-            activity.data,
-            activity.data,
-            ^blocked_id
-          ),
-        order_by: [fragment("? desc nulls last", activity.id)],
-        limit: 1
-      )
-
-    Repo.one(query)
+    "Block"
+    |> Activity.Queries.by_type()
+    |> where(actor: ^blocker_id)
+    # this is to use the index
+    |> Activity.Queries.by_object_id(blocked_id)
+    |> order_by([activity], fragment("? desc nulls last", activity.id))
+    |> limit(1)
+    |> Repo.one()
   end
 
   def make_block_data(blocker, blocked, activity_id) do
@@ -695,11 +647,11 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   #### Report-related helpers
 
   def update_report_state(%Activity{} = activity, state) when state in @supported_report_states do
-    with new_data <- Map.put(activity.data, "state", state),
-         changeset <- Changeset.change(activity, data: new_data),
-         {:ok, activity} <- Repo.update(changeset) do
-      {:ok, activity}
-    end
+    new_data = Map.put(activity.data, "state", state)
+
+    activity
+    |> Changeset.change(data: new_data)
+    |> Repo.update()
   end
 
   def update_report_state(_, _), do: {:error, "Unsupported state"}
@@ -766,21 +718,13 @@ defmodule Pleroma.Web.ActivityPub.Utils do
   end
 
   def get_existing_votes(actor, %{data: %{"id" => id}}) do
-    query =
-      from(
-        [activity, object: object] in Activity.with_preloaded_object(Activity),
-        where: fragment("(?)->>'type' = 'Create'", activity.data),
-        where: fragment("(?)->>'actor' = ?", activity.data, ^actor),
-        where:
-          fragment(
-            "(?)->>'inReplyTo' = ?",
-            object.data,
-            ^to_string(id)
-          ),
-        where: fragment("(?)->>'type' = 'Answer'", object.data)
-      )
-
-    Repo.all(query)
+    actor
+    |> Activity.Queries.by_actor()
+    |> Activity.Queries.by_type("Create")
+    |> Activity.with_preloaded_object()
+    |> where([a, object: o], fragment("(?)->>'inReplyTo' = ?", o.data, ^to_string(id)))
+    |> where([a, object: o], fragment("(?)->>'type' = 'Answer'", o.data))
+    |> Repo.all()
   end
 
   defp maybe_put(map, _key, nil), do: map
diff --git a/lib/pleroma/web/admin_api/config.ex b/lib/pleroma/web/admin_api/config.ex
index a10cc779b..1917a5580 100644
--- a/lib/pleroma/web/admin_api/config.ex
+++ b/lib/pleroma/web/admin_api/config.ex
@@ -90,6 +90,8 @@ defmodule Pleroma.Web.AdminAPI.Config do
     for v <- entity, into: [], do: do_convert(v)
   end
 
+  defp do_convert(%Regex{} = entity), do: inspect(entity)
+
   defp do_convert(entity) when is_map(entity) do
     for {k, v} <- entity, into: %{}, do: {do_convert(k), do_convert(v)}
   end
@@ -122,7 +124,7 @@ defmodule Pleroma.Web.AdminAPI.Config do
 
   def transform(entity), do: :erlang.term_to_binary(entity)
 
-  defp do_transform(%Regex{} = entity) when is_map(entity), do: entity
+  defp do_transform(%Regex{} = entity), do: entity
 
   defp do_transform(%{"tuple" => [":dispatch", [entity]]}) do
     {dispatch_settings, []} = do_eval(entity)
@@ -154,8 +156,15 @@ defmodule Pleroma.Web.AdminAPI.Config do
   defp do_transform(entity), do: entity
 
   defp do_transform_string("~r/" <> pattern) do
-    pattern = String.trim_trailing(pattern, "/")
-    ~r/#{pattern}/
+    modificator = String.split(pattern, "/") |> List.last()
+    pattern = String.trim_trailing(pattern, "/" <> modificator)
+
+    case modificator do
+      "" -> ~r/#{pattern}/
+      "i" -> ~r/#{pattern}/i
+      "u" -> ~r/#{pattern}/u
+      "s" -> ~r/#{pattern}/s
+    end
   end
 
   defp do_transform_string(":" <> atom), do: String.to_atom(atom)
diff --git a/lib/pleroma/web/controller_helper.ex b/lib/pleroma/web/controller_helper.ex
index eeac9f503..b53a01955 100644
--- a/lib/pleroma/web/controller_helper.ex
+++ b/lib/pleroma/web/controller_helper.ex
@@ -34,79 +34,38 @@ defmodule Pleroma.Web.ControllerHelper do
 
   defp param_to_integer(_, default), do: default
 
-  def add_link_headers(
-        conn,
-        method,
-        activities,
-        param \\ nil,
-        params \\ %{},
-        func3 \\ nil,
-        func4 \\ nil
-      ) do
-    params =
-      conn.params
-      |> Map.drop(["since_id", "max_id", "min_id"])
-      |> Map.merge(params)
+  def add_link_headers(conn, activities, extra_params \\ %{}) do
+    case List.last(activities) do
+      %{id: max_id} ->
+        params =
+          conn.params
+          |> Map.drop(Map.keys(conn.path_params))
+          |> Map.drop(["since_id", "max_id", "min_id"])
+          |> Map.merge(extra_params)
 
-    last = List.last(activities)
+        limit =
+          params
+          |> Map.get("limit", "20")
+          |> String.to_integer()
 
-    func3 = func3 || (&mastodon_api_url/3)
-    func4 = func4 || (&mastodon_api_url/4)
+        min_id =
+          if length(activities) <= limit do
+            activities
+            |> List.first()
+            |> Map.get(:id)
+          else
+            activities
+            |> Enum.at(limit * -1)
+            |> Map.get(:id)
+          end
 
-    if last do
-      max_id = last.id
+        next_url = current_url(conn, Map.merge(params, %{max_id: max_id}))
+        prev_url = current_url(conn, Map.merge(params, %{min_id: min_id}))
 
-      limit =
-        params
-        |> Map.get("limit", "20")
-        |> String.to_integer()
+        put_resp_header(conn, "link", "<#{next_url}>; rel=\"next\", <#{prev_url}>; rel=\"prev\"")
 
-      min_id =
-        if length(activities) <= limit do
-          activities
-          |> List.first()
-          |> Map.get(:id)
-        else
-          activities
-          |> Enum.at(limit * -1)
-          |> Map.get(:id)
-        end
-
-      {next_url, prev_url} =
-        if param do
-          {
-            func4.(
-              Pleroma.Web.Endpoint,
-              method,
-              param,
-              Map.merge(params, %{max_id: max_id})
-            ),
-            func4.(
-              Pleroma.Web.Endpoint,
-              method,
-              param,
-              Map.merge(params, %{min_id: min_id})
-            )
-          }
-        else
-          {
-            func3.(
-              Pleroma.Web.Endpoint,
-              method,
-              Map.merge(params, %{max_id: max_id})
-            ),
-            func3.(
-              Pleroma.Web.Endpoint,
-              method,
-              Map.merge(params, %{min_id: min_id})
-            )
-          }
-        end
-
-      conn
-      |> put_resp_header("link", "<#{next_url}>; rel=\"next\", <#{prev_url}>; rel=\"prev\"")
-    else
-      conn
+      _ ->
+        conn
     end
   end
 end
diff --git a/lib/pleroma/web/federator/federator.ex b/lib/pleroma/web/federator/federator.ex
index f4f9e83e0..1a2da014a 100644
--- a/lib/pleroma/web/federator/federator.ex
+++ b/lib/pleroma/web/federator/federator.ex
@@ -10,16 +10,17 @@ defmodule Pleroma.Web.Federator do
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.ActivityPub.Utils
   alias Pleroma.Web.Federator.Publisher
-  alias Pleroma.Web.Federator.RetryQueue
   alias Pleroma.Web.OStatus
   alias Pleroma.Web.Websub
+  alias Pleroma.Workers.PublisherWorker
+  alias Pleroma.Workers.ReceiverWorker
+  alias Pleroma.Workers.SubscriberWorker
 
   require Logger
 
   def init do
-    # 1 minute
-    Process.sleep(1000 * 60)
-    refresh_subscriptions()
+    # To do: consider removing this call in favor of scheduled execution (`quantum`-based)
+    refresh_subscriptions(schedule_in: 60)
   end
 
   @doc "Addresses [memory leaks on recursive replies fetching](https://git.pleroma.social/pleroma/pleroma/issues/161)"
@@ -37,50 +38,38 @@ defmodule Pleroma.Web.Federator do
   # Client API
 
   def incoming_doc(doc) do
-    PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_doc, doc])
+    ReceiverWorker.enqueue("incoming_doc", %{"body" => doc})
   end
 
   def incoming_ap_doc(params) do
-    PleromaJobQueue.enqueue(:federator_incoming, __MODULE__, [:incoming_ap_doc, params])
+    ReceiverWorker.enqueue("incoming_ap_doc", %{"params" => params})
   end
 
-  def publish(activity, priority \\ 1) do
-    PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish, activity], priority)
+  def publish(%{id: "pleroma:fakeid"} = activity) do
+    perform(:publish, activity)
   end
 
-  def verify_websub(websub) do
-    PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:verify_websub, websub])
+  def publish(activity) do
+    PublisherWorker.enqueue("publish", %{"activity_id" => activity.id})
   end
 
-  def request_subscription(sub) do
-    PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:request_subscription, sub])
+  def verify_websub(websub) do
+    SubscriberWorker.enqueue("verify_websub", %{"websub_id" => websub.id})
   end
 
-  def refresh_subscriptions do
-    PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:refresh_subscriptions])
+  def request_subscription(websub) do
+    SubscriberWorker.enqueue("request_subscription", %{"websub_id" => websub.id})
   end
 
-  # Job Worker Callbacks
-
-  def perform(:refresh_subscriptions) do
-    Logger.debug("Federator running refresh subscriptions")
-    Websub.refresh_subscriptions()
-
-    spawn(fn ->
-      # 6 hours
-      Process.sleep(1000 * 60 * 60 * 6)
-      refresh_subscriptions()
-    end)
+  def refresh_subscriptions(worker_args \\ []) do
+    SubscriberWorker.enqueue("refresh_subscriptions", %{}, worker_args ++ [max_attempts: 1])
   end
 
-  def perform(:request_subscription, websub) do
-    Logger.debug("Refreshing #{websub.topic}")
+  # Job Worker Callbacks
 
-    with {:ok, websub} <- Websub.request_subscription(websub) do
-      Logger.debug("Successfully refreshed #{websub.topic}")
-    else
-      _e -> Logger.debug("Couldn't refresh #{websub.topic}")
-    end
+  @spec perform(atom(), module(), any()) :: {:ok, any()} | {:error, any()}
+  def perform(:publish_one, module, params) do
+    apply(module, :publish_one, [params])
   end
 
   def perform(:publish, activity) do
@@ -92,14 +81,6 @@ defmodule Pleroma.Web.Federator do
     end
   end
 
-  def perform(:verify_websub, websub) do
-    Logger.debug(fn ->
-      "Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
-    end)
-
-    Websub.verify(websub)
-  end
-
   def perform(:incoming_doc, doc) do
     Logger.info("Got document, trying to parse")
     OStatus.handle_incoming(doc)
@@ -130,22 +111,27 @@ defmodule Pleroma.Web.Federator do
     end
   end
 
-  def perform(
-        :publish_single_websub,
-        %{xml: _xml, topic: _topic, callback: _callback, secret: _secret} = params
-      ) do
-    case Websub.publish_one(params) do
-      {:ok, _} ->
-        :ok
+  def perform(:request_subscription, websub) do
+    Logger.debug("Refreshing #{websub.topic}")
 
-      {:error, _} ->
-        RetryQueue.enqueue(params, Websub)
+    with {:ok, websub} <- Websub.request_subscription(websub) do
+      Logger.debug("Successfully refreshed #{websub.topic}")
+    else
+      _e -> Logger.debug("Couldn't refresh #{websub.topic}")
     end
   end
 
-  def perform(type, _) do
-    Logger.debug(fn -> "Unknown task: #{type}" end)
-    {:error, "Don't know what to do with this"}
+  def perform(:verify_websub, websub) do
+    Logger.debug(fn ->
+      "Running WebSub verification for #{websub.id} (#{websub.topic}, #{websub.callback})"
+    end)
+
+    Websub.verify(websub)
+  end
+
+  def perform(:refresh_subscriptions) do
+    Logger.debug("Federator running refresh subscriptions")
+    Websub.refresh_subscriptions()
   end
 
   def ap_enabled_actor(id) do
diff --git a/lib/pleroma/web/federator/publisher.ex b/lib/pleroma/web/federator/publisher.ex
index 70f870244..937064638 100644
--- a/lib/pleroma/web/federator/publisher.ex
+++ b/lib/pleroma/web/federator/publisher.ex
@@ -6,7 +6,7 @@ defmodule Pleroma.Web.Federator.Publisher do
   alias Pleroma.Activity
   alias Pleroma.Config
   alias Pleroma.User
-  alias Pleroma.Web.Federator.RetryQueue
+  alias Pleroma.Workers.PublisherWorker
 
   require Logger
 
@@ -30,23 +30,11 @@ defmodule Pleroma.Web.Federator.Publisher do
   Enqueue publishing a single activity.
   """
   @spec enqueue_one(module(), Map.t()) :: :ok
-  def enqueue_one(module, %{} = params),
-    do: PleromaJobQueue.enqueue(:federator_outgoing, __MODULE__, [:publish_one, module, params])
-
-  @spec perform(atom(), module(), any()) :: {:ok, any()} | {:error, any()}
-  def perform(:publish_one, module, params) do
-    case apply(module, :publish_one, [params]) do
-      {:ok, _} ->
-        :ok
-
-      {:error, _e} ->
-        RetryQueue.enqueue(params, module)
-    end
-  end
-
-  def perform(type, _, _) do
-    Logger.debug("Unknown task: #{type}")
-    {:error, "Don't know what to do with this"}
+  def enqueue_one(module, %{} = params) do
+    PublisherWorker.enqueue(
+      "publish_one",
+      %{"module" => to_string(module), "params" => params}
+    )
   end
 
   @doc """
diff --git a/lib/pleroma/web/federator/retry_queue.ex b/lib/pleroma/web/federator/retry_queue.ex
deleted file mode 100644
index 9eab8c218..000000000
--- a/lib/pleroma/web/federator/retry_queue.ex
+++ /dev/null
@@ -1,239 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.Federator.RetryQueue do
-  use GenServer
-
-  require Logger
-
-  def init(args) do
-    queue_table = :ets.new(:pleroma_retry_queue, [:bag, :protected])
-
-    {:ok, %{args | queue_table: queue_table, running_jobs: :sets.new()}}
-  end
-
-  def start_link(_) do
-    enabled =
-      if Pleroma.Config.get(:env) == :test,
-        do: true,
-        else: Pleroma.Config.get([__MODULE__, :enabled], false)
-
-    if enabled do
-      Logger.info("Starting retry queue")
-
-      linkres =
-        GenServer.start_link(
-          __MODULE__,
-          %{delivered: 0, dropped: 0, queue_table: nil, running_jobs: nil},
-          name: __MODULE__
-        )
-
-      maybe_kickoff_timer()
-      linkres
-    else
-      Logger.info("Retry queue disabled")
-      :ignore
-    end
-  end
-
-  def enqueue(data, transport, retries \\ 0) do
-    GenServer.cast(__MODULE__, {:maybe_enqueue, data, transport, retries + 1})
-  end
-
-  def get_stats do
-    GenServer.call(__MODULE__, :get_stats)
-  end
-
-  def reset_stats do
-    GenServer.call(__MODULE__, :reset_stats)
-  end
-
-  def get_retry_params(retries) do
-    if retries > Pleroma.Config.get([__MODULE__, :max_retries]) do
-      {:drop, "Max retries reached"}
-    else
-      {:retry, growth_function(retries)}
-    end
-  end
-
-  def get_retry_timer_interval do
-    Pleroma.Config.get([:retry_queue, :interval], 1000)
-  end
-
-  defp ets_count_expires(table, current_time) do
-    :ets.select_count(
-      table,
-      [
-        {
-          {:"$1", :"$2"},
-          [{:"=<", :"$1", {:const, current_time}}],
-          [true]
-        }
-      ]
-    )
-  end
-
-  defp ets_pop_n_expired(table, current_time, desired) do
-    {popped, _continuation} =
-      :ets.select(
-        table,
-        [
-          {
-            {:"$1", :"$2"},
-            [{:"=<", :"$1", {:const, current_time}}],
-            [:"$_"]
-          }
-        ],
-        desired
-      )
-
-    popped
-    |> Enum.each(fn e ->
-      :ets.delete_object(table, e)
-    end)
-
-    popped
-  end
-
-  def maybe_start_job(running_jobs, queue_table) do
-    # we don't want to hit the ets or the DateTime more times than we have to
-    # could optimize slightly further by not using the count, and instead grabbing
-    # up to N objects early...
-    current_time = DateTime.to_unix(DateTime.utc_now())
-    n_running_jobs = :sets.size(running_jobs)
-
-    if n_running_jobs < Pleroma.Config.get([__MODULE__, :max_jobs]) do
-      n_ready_jobs = ets_count_expires(queue_table, current_time)
-
-      if n_ready_jobs > 0 do
-        # figure out how many we could start
-        available_job_slots = Pleroma.Config.get([__MODULE__, :max_jobs]) - n_running_jobs
-        start_n_jobs(running_jobs, queue_table, current_time, available_job_slots)
-      else
-        running_jobs
-      end
-    else
-      running_jobs
-    end
-  end
-
-  defp start_n_jobs(running_jobs, _queue_table, _current_time, 0) do
-    running_jobs
-  end
-
-  defp start_n_jobs(running_jobs, queue_table, current_time, available_job_slots)
-       when available_job_slots > 0 do
-    candidates = ets_pop_n_expired(queue_table, current_time, available_job_slots)
-
-    candidates
-    |> List.foldl(running_jobs, fn {_, e}, rj ->
-      {:ok, pid} = Task.start(fn -> worker(e) end)
-      mref = Process.monitor(pid)
-      :sets.add_element(mref, rj)
-    end)
-  end
-
-  def worker({:send, data, transport, retries}) do
-    case transport.publish_one(data) do
-      {:ok, _} ->
-        GenServer.cast(__MODULE__, :inc_delivered)
-        :delivered
-
-      {:error, _reason} ->
-        enqueue(data, transport, retries)
-        :retry
-    end
-  end
-
-  def handle_call(:get_stats, _from, %{delivered: delivery_count, dropped: drop_count} = state) do
-    {:reply, %{delivered: delivery_count, dropped: drop_count}, state}
-  end
-
-  def handle_call(:reset_stats, _from, %{delivered: delivery_count, dropped: drop_count} = state) do
-    {:reply, %{delivered: delivery_count, dropped: drop_count},
-     %{state | delivered: 0, dropped: 0}}
-  end
-
-  def handle_cast(:reset_stats, state) do
-    {:noreply, %{state | delivered: 0, dropped: 0}}
-  end
-
-  def handle_cast(
-        {:maybe_enqueue, data, transport, retries},
-        %{dropped: drop_count, queue_table: queue_table, running_jobs: running_jobs} = state
-      ) do
-    case get_retry_params(retries) do
-      {:retry, timeout} ->
-        :ets.insert(queue_table, {timeout, {:send, data, transport, retries}})
-        running_jobs = maybe_start_job(running_jobs, queue_table)
-        {:noreply, %{state | running_jobs: running_jobs}}
-
-      {:drop, message} ->
-        Logger.debug(message)
-        {:noreply, %{state | dropped: drop_count + 1}}
-    end
-  end
-
-  def handle_cast(:kickoff_timer, state) do
-    retry_interval = get_retry_timer_interval()
-    Process.send_after(__MODULE__, :retry_timer_run, retry_interval)
-    {:noreply, state}
-  end
-
-  def handle_cast(:inc_delivered, %{delivered: delivery_count} = state) do
-    {:noreply, %{state | delivered: delivery_count + 1}}
-  end
-
-  def handle_cast(:inc_dropped, %{dropped: drop_count} = state) do
-    {:noreply, %{state | dropped: drop_count + 1}}
-  end
-
-  def handle_info({:send, data, transport, retries}, %{delivered: delivery_count} = state) do
-    case transport.publish_one(data) do
-      {:ok, _} ->
-        {:noreply, %{state | delivered: delivery_count + 1}}
-
-      {:error, _reason} ->
-        enqueue(data, transport, retries)
-        {:noreply, state}
-    end
-  end
-
-  def handle_info(
-        :retry_timer_run,
-        %{queue_table: queue_table, running_jobs: running_jobs} = state
-      ) do
-    maybe_kickoff_timer()
-    running_jobs = maybe_start_job(running_jobs, queue_table)
-    {:noreply, %{state | running_jobs: running_jobs}}
-  end
-
-  def handle_info({:DOWN, ref, :process, _pid, _reason}, state) do
-    %{running_jobs: running_jobs, queue_table: queue_table} = state
-    running_jobs = :sets.del_element(ref, running_jobs)
-    running_jobs = maybe_start_job(running_jobs, queue_table)
-    {:noreply, %{state | running_jobs: running_jobs}}
-  end
-
-  def handle_info(unknown, state) do
-    Logger.debug("RetryQueue: don't know what to do with #{inspect(unknown)}, ignoring")
-    {:noreply, state}
-  end
-
-  if Pleroma.Config.get(:env) == :test do
-    defp growth_function(_retries) do
-      _shutit = Pleroma.Config.get([__MODULE__, :initial_timeout])
-      DateTime.to_unix(DateTime.utc_now()) - 1
-    end
-  else
-    defp growth_function(retries) do
-      round(Pleroma.Config.get([__MODULE__, :initial_timeout]) * :math.pow(retries, 3)) +
-        DateTime.to_unix(DateTime.utc_now())
-    end
-  end
-
-  defp maybe_kickoff_timer do
-    GenServer.cast(__MODULE__, :kickoff_timer)
-  end
-end
diff --git a/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
index c54462bb3..060137b80 100644
--- a/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex
@@ -6,7 +6,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   use Pleroma.Web, :controller
 
   import Pleroma.Web.ControllerHelper,
-    only: [json_response: 3, add_link_headers: 5, add_link_headers: 4, add_link_headers: 3]
+    only: [json_response: 3, add_link_headers: 2, add_link_headers: 3]
 
   alias Ecto.Changeset
   alias Pleroma.Activity
@@ -365,7 +365,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.reverse()
 
     conn
-    |> add_link_headers(:home_timeline, activities)
+    |> add_link_headers(activities)
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -384,7 +384,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.reverse()
 
     conn
-    |> add_link_headers(:public_timeline, activities, false, %{"local" => local_only})
+    |> add_link_headers(activities, %{"local" => local_only})
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -398,7 +398,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       activities = ActivityPub.fetch_user_activities(user, reading_user, params)
 
       conn
-      |> add_link_headers(:user_statuses, activities, params["id"])
+      |> add_link_headers(activities)
       |> put_view(StatusView)
       |> render("index.json", %{
         activities: activities,
@@ -422,7 +422,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Pagination.fetch_paginated(params)
 
     conn
-    |> add_link_headers(:dm_timeline, activities)
+    |> add_link_headers(activities)
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -537,7 +537,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
   def scheduled_statuses(%{assigns: %{user: user}} = conn, params) do
     with scheduled_activities <- MastodonAPI.get_scheduled_activities(user, params) do
       conn
-      |> add_link_headers(:scheduled_statuses, scheduled_activities)
+      |> add_link_headers(scheduled_activities)
       |> put_view(ScheduledActivityView)
       |> render("index.json", %{scheduled_activities: scheduled_activities})
     end
@@ -720,7 +720,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
     notifications = MastodonAPI.get_notifications(user, params)
 
     conn
-    |> add_link_headers(:notifications, notifications)
+    |> add_link_headers(notifications)
     |> put_view(NotificationView)
     |> render("index.json", %{notifications: notifications, for: user})
   end
@@ -842,6 +842,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
 
   def favourited_by(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with %Activity{} = activity <- Activity.get_by_id_with_object(id),
+         {:visible, true} <- {:visible, Visibility.visible_for_user?(activity, user)},
          %Object{data: %{"likes" => likes}} <- Object.normalize(activity) do
       q = from(u in User, where: u.ap_id in ^likes)
 
@@ -853,12 +854,14 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> put_view(AccountView)
       |> render("accounts.json", %{for: user, users: users, as: :user})
     else
+      {:visible, false} -> {:error, :not_found}
       _ -> json(conn, [])
     end
   end
 
   def reblogged_by(%{assigns: %{user: user}} = conn, %{"id" => id}) do
     with %Activity{} = activity <- Activity.get_by_id_with_object(id),
+         {:visible, true} <- {:visible, Visibility.visible_for_user?(activity, user)},
          %Object{data: %{"announcements" => announces}} <- Object.normalize(activity) do
       q = from(u in User, where: u.ap_id in ^announces)
 
@@ -870,6 +873,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> put_view(AccountView)
       |> render("accounts.json", %{for: user, users: users, as: :user})
     else
+      {:visible, false} -> {:error, :not_found}
       _ -> json(conn, [])
     end
   end
@@ -908,7 +912,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.reverse()
 
     conn
-    |> add_link_headers(:hashtag_timeline, activities, params["tag"], %{"local" => local_only})
+    |> add_link_headers(activities, %{"local" => local_only})
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -924,7 +928,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
         end
 
       conn
-      |> add_link_headers(:followers, followers, user)
+      |> add_link_headers(followers)
       |> put_view(AccountView)
       |> render("accounts.json", %{for: for_user, users: followers, as: :user})
     end
@@ -941,7 +945,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
         end
 
       conn
-      |> add_link_headers(:following, followers, user)
+      |> add_link_headers(followers)
       |> put_view(AccountView)
       |> render("accounts.json", %{for: for_user, users: followers, as: :user})
     end
@@ -1166,7 +1170,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.reverse()
 
     conn
-    |> add_link_headers(:favourites, activities)
+    |> add_link_headers(activities)
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -1193,7 +1197,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
         |> Enum.reverse()
 
       conn
-      |> add_link_headers(:favourites, activities)
+      |> add_link_headers(activities)
       |> put_view(StatusView)
       |> render("index.json", %{activities: activities, for: for_user, as: :activity})
     else
@@ -1214,7 +1218,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       |> Enum.map(fn b -> Map.put(b.activity, :bookmark, Map.delete(b, :activity)) end)
 
     conn
-    |> add_link_headers(:bookmarks, bookmarks)
+    |> add_link_headers(bookmarks)
     |> put_view(StatusView)
     |> render("index.json", %{activities: activities, for: user, as: :activity})
   end
@@ -1654,7 +1658,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController do
       end)
 
     conn
-    |> add_link_headers(:conversations, participations)
+    |> add_link_headers(participations)
     |> json(conversations)
   end
 
diff --git a/lib/pleroma/web/oauth/token/clean_worker.ex b/lib/pleroma/web/oauth/token/clean_worker.ex
index f50098302..eb94bf86f 100644
--- a/lib/pleroma/web/oauth/token/clean_worker.ex
+++ b/lib/pleroma/web/oauth/token/clean_worker.ex
@@ -17,6 +17,7 @@ defmodule Pleroma.Web.OAuth.Token.CleanWorker do
             )
 
   alias Pleroma.Web.OAuth.Token
+  alias Pleroma.Workers.BackgroundWorker
 
   def start_link(_), do: GenServer.start_link(__MODULE__, %{})
 
@@ -27,9 +28,11 @@ defmodule Pleroma.Web.OAuth.Token.CleanWorker do
 
   @doc false
   def handle_info(:perform, state) do
-    Token.delete_expired_tokens()
+    BackgroundWorker.enqueue("clean_expired_tokens", %{})
 
     Process.send_after(self(), :perform, @interval)
     {:noreply, state}
   end
+
+  def perform(:clean), do: Token.delete_expired_tokens()
 end
diff --git a/lib/pleroma/web/pleroma_api/pleroma_api_controller.ex b/lib/pleroma/web/pleroma_api/pleroma_api_controller.ex
index f4df3b024..d17ccf84d 100644
--- a/lib/pleroma/web/pleroma_api/pleroma_api_controller.ex
+++ b/lib/pleroma/web/pleroma_api/pleroma_api_controller.ex
@@ -5,7 +5,7 @@
 defmodule Pleroma.Web.PleromaAPI.PleromaAPIController do
   use Pleroma.Web, :controller
 
-  import Pleroma.Web.ControllerHelper, only: [add_link_headers: 7]
+  import Pleroma.Web.ControllerHelper, only: [add_link_headers: 2]
 
   alias Pleroma.Conversation.Participation
   alias Pleroma.Notification
@@ -27,31 +27,22 @@ defmodule Pleroma.Web.PleromaAPI.PleromaAPIController do
         %{assigns: %{user: user}} = conn,
         %{"id" => participation_id} = params
       ) do
-    params =
-      params
-      |> Map.put("blocking_user", user)
-      |> Map.put("muting_user", user)
-      |> Map.put("user", user)
-
-    participation =
-      participation_id
-      |> Participation.get(preload: [:conversation])
+    participation = Participation.get(participation_id, preload: [:conversation])
 
     if user.id == participation.user_id do
+      params =
+        params
+        |> Map.put("blocking_user", user)
+        |> Map.put("muting_user", user)
+        |> Map.put("user", user)
+
       activities =
         participation.conversation.ap_id
         |> ActivityPub.fetch_activities_for_context(params)
         |> Enum.reverse()
 
       conn
-      |> add_link_headers(
-        :conversation_statuses,
-        activities,
-        participation_id,
-        params,
-        nil,
-        &pleroma_api_url/4
-      )
+      |> add_link_headers(activities)
       |> put_view(StatusView)
       |> render("index.json", %{activities: activities, for: user, as: :activity})
     end
diff --git a/lib/pleroma/web/push/push.ex b/lib/pleroma/web/push/push.ex
index 729dad02a..7ef1532ac 100644
--- a/lib/pleroma/web/push/push.ex
+++ b/lib/pleroma/web/push/push.ex
@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Push do
-  alias Pleroma.Web.Push.Impl
+  alias Pleroma.Workers.WebPusherWorker
 
   require Logger
 
@@ -31,6 +31,7 @@ defmodule Pleroma.Web.Push do
     end
   end
 
-  def send(notification),
-    do: PleromaJobQueue.enqueue(:web_push, Impl, [notification])
+  def send(notification) do
+    WebPusherWorker.enqueue("web_push", %{"notification_id" => notification.id})
+  end
 end
diff --git a/lib/pleroma/web/router.ex b/lib/pleroma/web/router.ex
index 7cd59acb2..b0464037e 100644
--- a/lib/pleroma/web/router.ex
+++ b/lib/pleroma/web/router.ex
@@ -224,6 +224,7 @@ defmodule Pleroma.Web.Router do
     scope [] do
       pipe_through(:oauth_write)
 
+      post("/change_email", UtilController, :change_email)
       post("/change_password", UtilController, :change_password)
       post("/delete_account", UtilController, :delete_account)
       put("/notification_settings", UtilController, :update_notificaton_settings)
diff --git a/lib/pleroma/web/salmon/salmon.ex b/lib/pleroma/web/salmon/salmon.ex
index 9b01ebcc6..8ba7380c0 100644
--- a/lib/pleroma/web/salmon/salmon.ex
+++ b/lib/pleroma/web/salmon/salmon.ex
@@ -170,6 +170,15 @@ defmodule Pleroma.Web.Salmon do
     end
   end
 
+  def publish_one(%{recipient_id: recipient_id} = params) do
+    recipient = User.get_cached_by_id(recipient_id)
+
+    params
+    |> Map.delete(:recipient_id)
+    |> Map.put(:recipient, recipient)
+    |> publish_one()
+  end
+
   def publish_one(_), do: :noop
 
   @supported_activities [
@@ -218,7 +227,7 @@ defmodule Pleroma.Web.Salmon do
         Logger.debug(fn -> "Sending Salmon to #{remote_user.ap_id}" end)
 
         Publisher.enqueue_one(__MODULE__, %{
-          recipient: remote_user,
+          recipient_id: remote_user.id,
           feed: feed,
           unreachable_since: reachable_urls_metadata[remote_user.info.salmon]
         })
diff --git a/lib/pleroma/web/twitter_api/controllers/util_controller.ex b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
index 3405bd3b7..d7745ae7a 100644
--- a/lib/pleroma/web/twitter_api/controllers/util_controller.ex
+++ b/lib/pleroma/web/twitter_api/controllers/util_controller.ex
@@ -265,12 +265,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
              String.split(line, ",") |> List.first()
            end)
            |> List.delete("Account address") do
-      PleromaJobQueue.enqueue(:background, User, [
-        :follow_import,
-        follower,
-        followed_identifiers
-      ])
-
+      User.follow_import(follower, followed_identifiers)
       json(conn, "job started")
     end
   end
@@ -281,12 +276,7 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
 
   def blocks_import(%{assigns: %{user: blocker}} = conn, %{"list" => list}) do
     with blocked_identifiers <- String.split(list) do
-      PleromaJobQueue.enqueue(:background, User, [
-        :blocks_import,
-        blocker,
-        blocked_identifiers
-      ])
-
+      User.blocks_import(blocker, blocked_identifiers)
       json(conn, "job started")
     end
   end
@@ -314,6 +304,25 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     end
   end
 
+  def change_email(%{assigns: %{user: user}} = conn, params) do
+    case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
+      {:ok, user} ->
+        with {:ok, _user} <- User.change_email(user, params["email"]) do
+          json(conn, %{status: "success"})
+        else
+          {:error, changeset} ->
+            {_, {error, _}} = Enum.at(changeset.errors, 0)
+            json(conn, %{error: "Email #{error}."})
+
+          _ ->
+            json(conn, %{error: "Unable to change email."})
+        end
+
+      {:error, msg} ->
+        json(conn, %{error: msg})
+    end
+  end
+
   def delete_account(%{assigns: %{user: user}} = conn, params) do
     case CommonAPI.Utils.confirm_current_password(user, params["password"]) do
       {:ok, user} ->
diff --git a/lib/pleroma/workers/activity_expiration_worker.ex b/lib/pleroma/workers/activity_expiration_worker.ex
new file mode 100644
index 000000000..4e3e4195f
--- /dev/null
+++ b/lib/pleroma/workers/activity_expiration_worker.ex
@@ -0,0 +1,18 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.ActivityExpirationWorker do
+  use Pleroma.Workers.WorkerHelper, queue: "activity_expiration"
+
+  @impl Oban.Worker
+  def perform(
+        %{
+          "op" => "activity_expiration",
+          "activity_expiration_id" => activity_expiration_id
+        },
+        _job
+      ) do
+    Pleroma.Daemons.ActivityExpirationDaemon.perform(:execute, activity_expiration_id)
+  end
+end
diff --git a/lib/pleroma/workers/background_worker.ex b/lib/pleroma/workers/background_worker.ex
new file mode 100644
index 000000000..082f20ab7
--- /dev/null
+++ b/lib/pleroma/workers/background_worker.ex
@@ -0,0 +1,69 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.BackgroundWorker do
+  alias Pleroma.Activity
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy
+  alias Pleroma.Web.OAuth.Token.CleanWorker
+
+  use Pleroma.Workers.WorkerHelper, queue: "background"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "fetch_initial_posts", "user_id" => user_id}, _job) do
+    user = User.get_cached_by_id(user_id)
+    User.perform(:fetch_initial_posts, user)
+  end
+
+  def perform(%{"op" => "deactivate_user", "user_id" => user_id, "status" => status}, _job) do
+    user = User.get_cached_by_id(user_id)
+    User.perform(:deactivate_async, user, status)
+  end
+
+  def perform(%{"op" => "delete_user", "user_id" => user_id}, _job) do
+    user = User.get_cached_by_id(user_id)
+    User.perform(:delete, user)
+  end
+
+  def perform(
+        %{
+          "op" => "blocks_import",
+          "blocker_id" => blocker_id,
+          "blocked_identifiers" => blocked_identifiers
+        },
+        _job
+      ) do
+    blocker = User.get_cached_by_id(blocker_id)
+    User.perform(:blocks_import, blocker, blocked_identifiers)
+  end
+
+  def perform(
+        %{
+          "op" => "follow_import",
+          "follower_id" => follower_id,
+          "followed_identifiers" => followed_identifiers
+        },
+        _job
+      ) do
+    follower = User.get_cached_by_id(follower_id)
+    User.perform(:follow_import, follower, followed_identifiers)
+  end
+
+  def perform(%{"op" => "clean_expired_tokens"}, _job) do
+    CleanWorker.perform(:clean)
+  end
+
+  def perform(%{"op" => "media_proxy_preload", "message" => message}, _job) do
+    MediaProxyWarmingPolicy.perform(:preload, message)
+  end
+
+  def perform(%{"op" => "media_proxy_prefetch", "url" => url}, _job) do
+    MediaProxyWarmingPolicy.perform(:prefetch, url)
+  end
+
+  def perform(%{"op" => "fetch_data_for_activity", "activity_id" => activity_id}, _job) do
+    activity = Activity.get_by_id(activity_id)
+    Pleroma.Web.RichMedia.Helpers.perform(:fetch, activity)
+  end
+end
diff --git a/lib/pleroma/workers/digest_emails_worker.ex b/lib/pleroma/workers/digest_emails_worker.ex
new file mode 100644
index 000000000..3e5a836d0
--- /dev/null
+++ b/lib/pleroma/workers/digest_emails_worker.ex
@@ -0,0 +1,16 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.DigestEmailsWorker do
+  alias Pleroma.User
+
+  use Pleroma.Workers.WorkerHelper, queue: "digest_emails"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "digest_email", "user_id" => user_id}, _job) do
+    user_id
+    |> User.get_cached_by_id()
+    |> Pleroma.Daemons.DigestEmailDaemon.perform()
+  end
+end
diff --git a/lib/pleroma/workers/mailer_worker.ex b/lib/pleroma/workers/mailer_worker.ex
new file mode 100644
index 000000000..1b7a0eb3e
--- /dev/null
+++ b/lib/pleroma/workers/mailer_worker.ex
@@ -0,0 +1,15 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.MailerWorker do
+  use Pleroma.Workers.WorkerHelper, queue: "mailer"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "email", "encoded_email" => encoded_email, "config" => config}, _job) do
+    encoded_email
+    |> Base.decode64!()
+    |> :erlang.binary_to_term()
+    |> Pleroma.Emails.Mailer.deliver(config)
+  end
+end
diff --git a/lib/pleroma/workers/publisher_worker.ex b/lib/pleroma/workers/publisher_worker.ex
new file mode 100644
index 000000000..455f7fc7e
--- /dev/null
+++ b/lib/pleroma/workers/publisher_worker.ex
@@ -0,0 +1,25 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.PublisherWorker do
+  alias Pleroma.Activity
+  alias Pleroma.Web.Federator
+
+  use Pleroma.Workers.WorkerHelper, queue: "federator_outgoing"
+
+  def backoff(attempt) when is_integer(attempt) do
+    Pleroma.Workers.WorkerHelper.sidekiq_backoff(attempt, 5)
+  end
+
+  @impl Oban.Worker
+  def perform(%{"op" => "publish", "activity_id" => activity_id}, _job) do
+    activity = Activity.get_by_id(activity_id)
+    Federator.perform(:publish, activity)
+  end
+
+  def perform(%{"op" => "publish_one", "module" => module_name, "params" => params}, _job) do
+    params = Map.new(params, fn {k, v} -> {String.to_atom(k), v} end)
+    Federator.perform(:publish_one, String.to_atom(module_name), params)
+  end
+end
diff --git a/lib/pleroma/workers/receiver_worker.ex b/lib/pleroma/workers/receiver_worker.ex
new file mode 100644
index 000000000..83d528a66
--- /dev/null
+++ b/lib/pleroma/workers/receiver_worker.ex
@@ -0,0 +1,18 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.ReceiverWorker do
+  alias Pleroma.Web.Federator
+
+  use Pleroma.Workers.WorkerHelper, queue: "federator_incoming"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "incoming_doc", "body" => doc}, _job) do
+    Federator.perform(:incoming_doc, doc)
+  end
+
+  def perform(%{"op" => "incoming_ap_doc", "params" => params}, _job) do
+    Federator.perform(:incoming_ap_doc, params)
+  end
+end
diff --git a/lib/pleroma/workers/scheduled_activity_worker.ex b/lib/pleroma/workers/scheduled_activity_worker.ex
new file mode 100644
index 000000000..ca7d53af1
--- /dev/null
+++ b/lib/pleroma/workers/scheduled_activity_worker.ex
@@ -0,0 +1,12 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.ScheduledActivityWorker do
+  use Pleroma.Workers.WorkerHelper, queue: "scheduled_activities"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "execute", "activity_id" => activity_id}, _job) do
+    Pleroma.Daemons.ScheduledActivityDaemon.perform(:execute, activity_id)
+  end
+end
diff --git a/lib/pleroma/workers/subscriber_worker.ex b/lib/pleroma/workers/subscriber_worker.ex
new file mode 100644
index 000000000..fc490e300
--- /dev/null
+++ b/lib/pleroma/workers/subscriber_worker.ex
@@ -0,0 +1,26 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.SubscriberWorker do
+  alias Pleroma.Repo
+  alias Pleroma.Web.Federator
+  alias Pleroma.Web.Websub
+
+  use Pleroma.Workers.WorkerHelper, queue: "federator_outgoing"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "refresh_subscriptions"}, _job) do
+    Federator.perform(:refresh_subscriptions)
+  end
+
+  def perform(%{"op" => "request_subscription", "websub_id" => websub_id}, _job) do
+    websub = Repo.get(Websub.WebsubClientSubscription, websub_id)
+    Federator.perform(:request_subscription, websub)
+  end
+
+  def perform(%{"op" => "verify_websub", "websub_id" => websub_id}, _job) do
+    websub = Repo.get(Websub.WebsubServerSubscription, websub_id)
+    Federator.perform(:verify_websub, websub)
+  end
+end
diff --git a/lib/pleroma/workers/transmogrifier_worker.ex b/lib/pleroma/workers/transmogrifier_worker.ex
new file mode 100644
index 000000000..b581a2f86
--- /dev/null
+++ b/lib/pleroma/workers/transmogrifier_worker.ex
@@ -0,0 +1,15 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.TransmogrifierWorker do
+  alias Pleroma.User
+
+  use Pleroma.Workers.WorkerHelper, queue: "transmogrifier"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "user_upgrade", "user_id" => user_id}, _job) do
+    user = User.get_cached_by_id(user_id)
+    Pleroma.Web.ActivityPub.Transmogrifier.perform(:user_upgrade, user)
+  end
+end
diff --git a/lib/pleroma/workers/web_pusher_worker.ex b/lib/pleroma/workers/web_pusher_worker.ex
new file mode 100644
index 000000000..bea2baffb
--- /dev/null
+++ b/lib/pleroma/workers/web_pusher_worker.ex
@@ -0,0 +1,16 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.WebPusherWorker do
+  alias Pleroma.Notification
+  alias Pleroma.Repo
+
+  use Pleroma.Workers.WorkerHelper, queue: "web_push"
+
+  @impl Oban.Worker
+  def perform(%{"op" => "web_push", "notification_id" => notification_id}, _job) do
+    notification = Repo.get(Notification, notification_id)
+    Pleroma.Web.Push.Impl.perform(notification)
+  end
+end
diff --git a/lib/pleroma/workers/worker_helper.ex b/lib/pleroma/workers/worker_helper.ex
new file mode 100644
index 000000000..358efa14a
--- /dev/null
+++ b/lib/pleroma/workers/worker_helper.ex
@@ -0,0 +1,46 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Workers.WorkerHelper do
+  alias Pleroma.Config
+  alias Pleroma.Workers.WorkerHelper
+
+  def worker_args(queue) do
+    case Config.get([:workers, :retries, queue]) do
+      nil -> []
+      max_attempts -> [max_attempts: max_attempts]
+    end
+  end
+
+  def sidekiq_backoff(attempt, pow \\ 4, base_backoff \\ 15) do
+    backoff =
+      :math.pow(attempt, pow) +
+        base_backoff +
+        :rand.uniform(2 * base_backoff) * attempt
+
+    trunc(backoff)
+  end
+
+  defmacro __using__(opts) do
+    caller_module = __CALLER__.module
+    queue = Keyword.fetch!(opts, :queue)
+
+    quote do
+      # Note: `max_attempts` is intended to be overridden in `new/2` call
+      use Oban.Worker,
+        queue: unquote(queue),
+        max_attempts: 1
+
+      def enqueue(op, params, worker_args \\ []) do
+        params = Map.merge(%{"op" => op}, params)
+        queue_atom = String.to_atom(unquote(queue))
+        worker_args = worker_args ++ WorkerHelper.worker_args(queue_atom)
+
+        unquote(caller_module)
+        |> apply(:new, [params, worker_args])
+        |> Pleroma.Repo.insert()
+      end
+    end
+  end
+end