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defmodule WalletAuth.Session.SessionStore do |
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@moduledoc """ |
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ETS-backed GenServer for session lifecycle management. |
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Manages active and revoked auth sessions. |
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On revocation, the session record is updated (not deleted) for audit traceability. |
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Per ADR 0006 and checklist Track D: |
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- Session start emits AuthSessionStarted event. |
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- Session revocation emits AuthSessionRevoked event. |
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""" |
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use GenServer |
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alias WalletAuth.Session.Session |
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@table :wallet_auth_session_store |
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# --- Client API --- |
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def start_link(opts) do |
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GenServer.start_link(__MODULE__, opts, name: __MODULE__) |
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end |
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@doc "Stores a new session. Returns :ok." |
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@spec store(Session.t()) :: :ok |
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def store(%Session{} = session) do |
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GenServer.call(__MODULE__, {:store, session}) |
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end |
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@doc """ |
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Looks up a session by session_id. |
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Returns `{:ok, session}` or `{:error, :not_found | :revoked}`. |
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""" |
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@spec lookup(String.t()) :: {:ok, Session.t()} | {:error, :not_found | :revoked} |
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def lookup(session_id) do |
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GenServer.call(__MODULE__, {:lookup, session_id}) |
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end |
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@doc "Revokes a session by session_id. Returns `{:ok, revoked_session}` or `{:error, :not_found}`." |
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@spec revoke(String.t()) :: {:ok, Session.t()} | {:error, :not_found} |
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def revoke(session_id) do |
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GenServer.call(__MODULE__, {:revoke, session_id}) |
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end |
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@doc "Lists all active sessions for a subject (user_id)." |
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@spec list_active(sub :: String.t()) :: [Session.t()] |
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def list_active(sub) do |
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GenServer.call(__MODULE__, {:list_active, sub}) |
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end |
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@doc "Resets all session store state. For test use only." |
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def reset, do: GenServer.call(__MODULE__, :reset) |
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# --- Server Callbacks --- |
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@impl true |
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def init(_opts) do |
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table = :ets.new(@table, [:set, :protected, :named_table]) |
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{:ok, %{table: table}} |
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end |
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@impl true |
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def handle_call({:store, session}, _from, state) do |
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:ets.insert(@table, {session.session_id, session}) |
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{:reply, :ok, state} |
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end |
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@impl true |
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def handle_call({:lookup, session_id}, _from, state) do |
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result = |
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case :ets.lookup(@table, session_id) do |
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[] -> {:error, :not_found} |
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[{_key, %Session{status: :revoked}}] -> {:error, :revoked} |
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[{_key, session}] -> {:ok, session} |
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end |
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{:reply, result, state} |
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end |
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@impl true |
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def handle_call({:revoke, session_id}, _from, state) do |
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result = |
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case :ets.lookup(@table, session_id) do |
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[] -> |
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{:error, :not_found} |
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[{_key, session}] -> |
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revoked = Session.revoke(session) |
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:ets.insert(@table, {session_id, revoked}) |
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{:ok, revoked} |
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end |
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{:reply, result, state} |
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end |
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@impl true |
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def handle_call({:list_active, sub}, _from, state) do |
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sessions = |
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:ets.foldl( |
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fn {_key, session}, acc -> |
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if session.sub == sub and Session.active?(session), do: [session | acc], else: acc |
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end, |
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[], |
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@table |
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) |
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{:reply, sessions, state} |
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end |
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@impl true |
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def handle_call(:reset, _from, state) do |
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:ets.delete_all_objects(@table) |
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{:reply, :ok, state} |
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end |
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end |