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defmodule WalletAuth.Device.DeviceStore do |
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@moduledoc """ |
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ETS-backed GenServer for trusted device lifecycle management. |
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Per checklist Track D: |
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- Device enroll, list, revoke with actor traceability. |
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""" |
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use GenServer |
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alias WalletAuth.Device.Device |
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@table :wallet_auth_device_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 "Registers a trusted device. Returns :ok." |
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@spec register(Device.t()) :: :ok |
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def register(%Device{} = device) do |
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GenServer.call(__MODULE__, {:register, device}) |
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end |
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@doc "Lists all trusted devices for a subject." |
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@spec list_trusted(sub :: String.t()) :: [Device.t()] |
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def list_trusted(sub) do |
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GenServer.call(__MODULE__, {:list_trusted, sub}) |
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end |
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@doc """ |
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Looks up a device by device_id. |
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Returns `{:ok, device}` or `{:error, :not_found | :revoked}`. |
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""" |
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@spec lookup(String.t()) :: {:ok, Device.t()} | {:error, :not_found | :revoked} |
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def lookup(device_id) do |
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GenServer.call(__MODULE__, {:lookup, device_id}) |
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end |
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@doc "Revokes a device. Returns `{:ok, revoked_device}` or `{:error, :not_found}`." |
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@spec revoke(String.t(), revoked_by :: String.t()) :: |
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{:ok, Device.t()} | {:error, :not_found} |
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def revoke(device_id, revoked_by) do |
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GenServer.call(__MODULE__, {:revoke, device_id, revoked_by}) |
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end |
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@doc "Resets all device 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({:register, device}, _from, state) do |
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:ets.insert(@table, {device.device_id, device}) |
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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({:list_trusted, sub}, _from, state) do |
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devices = |
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:ets.foldl( |
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fn {_key, device}, acc -> |
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if device.sub == sub and Device.trusted?(device), do: [device | 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, devices, state} |
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end |
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@impl true |
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def handle_call({:lookup, device_id}, _from, state) do |
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result = |
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case :ets.lookup(@table, device_id) do |
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[] -> {:error, :not_found} |
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[{_key, %Device{status: :revoked}}] -> {:error, :revoked} |
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[{_key, device}] -> {:ok, device} |
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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, device_id, revoked_by}, _from, state) do |
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result = |
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case :ets.lookup(@table, device_id) do |
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[] -> |
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{:error, :not_found} |
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[{_key, device}] -> |
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revoked = Device.revoke(device, revoked_by) |
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:ets.insert(@table, {device_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(: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 |