Add rollback migrations for Rebased

Signed-off-by: mkljczk <git@mkljczk.pl>

priv/repo/optional_migrations/rebased_rollbacks/20210612185407_add_email_list_field_to_users.exs

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+# Adapted from Rebased
+# https://gitlab.com/soapbox-pub/rebased/-/blob/main/priv/repo/migrations/20210612185407_add_email_list_field_to_users.exs
+
+defmodule Pleroma.Repo.Migrations.AddEmailListFieldToUsers do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    alter table(:users) do
+      remove_if_exists(:accepts_email_list, :boolean)
+    end
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20220225164000_add_activity_assigned_account_index.exs

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+defmodule Pleroma.Repo.Migrations.AddActivityAssignedAccountIndex do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    drop_if_exists(
+      index(:activities, ["(data->>'assigned_account')"],
+        name: :activities_assigned_account_index
+      )
+    )
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20220314220000_add_location_to_users.exs

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+defmodule Pleroma.Repo.Migrations.AddLocationToUsers do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    alter table(:users) do
+      remove_if_exists(:location, :string)
+    end
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20220624104914_create_webhooks.exs

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+defmodule Pleroma.Repo.Migrations.CreateWebhooks do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    drop_if_exists(unique_index(:webhooks, [:url]))
+    drop_if_exists(table(:webhooks))
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20220819171321_add_pleroma_participation_accepted_to_notifications_enum.exs

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+defmodule Pleroma.Repo.Migrations.AddPleromaParticipationAcceptedToNotificationsEnum do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    alter table(:notifications) do
+      modify(:type, :string)
+    end
+
+    """
+    delete from notifications where type in ('pleroma:participation_accepted', 'pleroma:participation_request', 'pleroma:event_reminder', 'pleroma:event_update')
+    """
+    |> execute()
+
+    """
+    drop type if exists notification_type
+    """
+    |> execute()
+
+    """
+    create type notification_type as enum (
+      'follow',
+      'follow_request',
+      'mention',
+      'move',
+      'pleroma:emoji_reaction',
+      'pleroma:chat_mention',
+      'reblog',
+      'favourite',
+      'pleroma:report',
+      'poll',
+      'status',
+      'update'
+    )
+    """
+    |> execute()
+
+    """
+    alter table notifications
+    alter column type type notification_type using (type::notification_type)
+    """
+    |> execute()
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20220927220033_add_last_move_at_to_users.exs

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+defmodule Pleroma.Repo.Migrations.AddLastMoveAtToUsers do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    alter table(:users) do
+      remove_if_exists(:last_move_at, :naive_datetime)
+    end
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20221029171353_add_internal_to_webhooks.exs

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+defmodule Pleroma.Repo.Migrations.AddInternalToWebhooks do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    alter table(:webhooks) do
+      remove_if_exists(:internal, :boolean)
+    end
+  end
+end

priv/repo/optional_migrations/rebased_rollbacks/20221207235104_add_events_index.exs

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+# Adapted from Rebased
+# https://gitlab.com/soapbox-pub/rebased/-/blob/main/priv/repo/migrations/20221207235104_add_events_index.exs
+
+defmodule Pleroma.Repo.Migrations.AddEventsIndex do
+  use Ecto.Migration
+
+  def up, do: :noop
+
+  def down do
+    drop_if_exists(
+      index(:objects, ["(data->>'type')"],
+        where: "data->>'type' = 'Event'",
+        name: :objects_events
+      )
+    )
+  end
+end