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A foundation for building Elixir Phoenix apps — SaaS, social networks, ERP systems, marketplaces, and more
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Files
lib/phoenix_kit/users/scope_notifier.ex
defmodule PhoenixKit.Users.ScopeNotifier do
@moduledoc """
Handles PubSub notifications for user scope refreshes.
When a user's roles change, we broadcast a message on a user-specific topic
so any connected LiveViews can refresh their cached authentication scope
without requiring a full reconnect.
"""
alias PhoenixKit.PubSub.Manager
alias PhoenixKit.Users.Auth.User
@topic_prefix "phoenix_kit:user_scope:"
@doc """
Broadcasts a scope refresh notification for the given user.
"""
@spec broadcast_roles_updated(User.t() | binary() | nil) :: :ok
def broadcast_roles_updated(nil), do: :ok
def broadcast_roles_updated(%User{uuid: user_uuid}) when is_binary(user_uuid) do
broadcast_roles_updated(user_uuid)
end
def broadcast_roles_updated(user_uuid) when is_binary(user_uuid) do
Manager.broadcast(topic(user_uuid), {:phoenix_kit_scope_roles_updated, user_uuid})
end
def broadcast_roles_updated(_), do: :ok
@doc """
Subscribes the current process to scope refresh notifications for the user.
"""
@spec subscribe(User.t() | binary()) :: :ok | {:error, term()}
def subscribe(%User{uuid: user_uuid}) when is_binary(user_uuid), do: subscribe(user_uuid)
def subscribe(user_uuid) when is_binary(user_uuid) do
Manager.subscribe(topic(user_uuid))
end
def subscribe(_), do: :ok
@doc """
Unsubscribes the current process from scope refresh notifications.
"""
@spec unsubscribe(User.t() | binary() | nil) :: :ok
def unsubscribe(nil), do: :ok
def unsubscribe(%User{uuid: user_uuid}) when is_binary(user_uuid) do
unsubscribe(user_uuid)
end
def unsubscribe(user_uuid) when is_binary(user_uuid) do
Manager.unsubscribe(topic(user_uuid))
end
def unsubscribe(_), do: :ok
defp topic(user_uuid), do: "#{@topic_prefix}#{user_uuid}"
end