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defmodule WalletIntegrations.CallbackStore do |
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@moduledoc """ |
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ETS-backed GenServer for CallbackRecord persistence. |
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Tables: |
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- `:wallet_integrations_callbacks` — keyed by callback_id. |
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- `:wallet_integrations_cb_provider_idx` — bag: {provider, callback_id}. |
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- `:wallet_integrations_cb_msg_id_idx` — set: {inbox_message_id, callback_id} for dedup lookup. |
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""" |
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use GenServer |
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alias WalletIntegrations.CallbackRecord |
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@table :wallet_integrations_callbacks |
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@prov_idx :wallet_integrations_cb_provider_idx |
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@msg_idx :wallet_integrations_cb_msg_id_idx |
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:-( |
def start_link(opts), do: GenServer.start_link(__MODULE__, opts, name: __MODULE__) |
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@spec store(CallbackRecord.t()) :: :ok | {:error, :duplicate_callback_id} |
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def store(%CallbackRecord{} = cb), do: GenServer.call(__MODULE__, {:store, cb}) |
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@spec get(callback_id :: String.t()) :: {:ok, CallbackRecord.t()} | {:error, :not_found} |
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def get(id), do: GenServer.call(__MODULE__, {:get, id}) |
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@spec update(CallbackRecord.t()) :: :ok | {:error, :not_found} |
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def update(%CallbackRecord{} = cb), do: GenServer.call(__MODULE__, {:update, cb}) |
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@spec get_by_message_id(message_id :: String.t()) :: {:ok, CallbackRecord.t()} | {:error, :not_found} |
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def get_by_message_id(message_id), do: GenServer.call(__MODULE__, {:get_by_msg_id, message_id}) |
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@spec list_by_provider(provider :: atom()) :: [CallbackRecord.t()] |
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def list_by_provider(provider), do: GenServer.call(__MODULE__, {:list_by_provider, provider}) |
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@spec reset() :: :ok |
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def reset, do: GenServer.call(__MODULE__, :reset) |
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@impl true |
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def init(_opts) do |
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:ets.new(@table, [:set, :protected, :named_table]) |
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:ets.new(@prov_idx, [:bag, :protected, :named_table]) |
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:ets.new(@msg_idx, [:set, :protected, :named_table]) |
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{:ok, %{}} |
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end |
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@impl true |
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def handle_call({:store, cb}, _from, state) do |
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if :ets.member(@table, cb.callback_id) do |
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{:reply, {:error, :duplicate_callback_id}, state} |
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else |
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:ets.insert(@table, {cb.callback_id, cb}) |
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:ets.insert(@prov_idx, {cb.provider, cb.callback_id}) |
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if cb.inbox_message_id do |
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:ets.insert(@msg_idx, {cb.inbox_message_id, cb.callback_id}) |
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end |
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{:reply, :ok, state} |
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end |
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end |
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@impl true |
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def handle_call({:get, id}, _from, state) do |
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result = |
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case :ets.lookup(@table, id) do |
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[{_, cb}] -> {:ok, cb} |
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[] -> {:error, :not_found} |
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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({:update, cb}, _from, state) do |
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result = |
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case :ets.lookup(@table, cb.callback_id) do |
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[{_, _old}] -> |
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:ets.insert(@table, {cb.callback_id, cb}) |
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:ok |
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[] -> |
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{:error, :not_found} |
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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({:get_by_msg_id, message_id}, _from, state) do |
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result = |
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case :ets.lookup(@msg_idx, message_id) do |
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[{_, cb_id}] -> |
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case :ets.lookup(@table, cb_id) do |
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[{_, cb}] -> {:ok, cb} |
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[] -> {:error, :not_found} |
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end |
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[] -> {:error, :not_found} |
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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_by_provider, provider}, _from, state) do |
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ids = :ets.lookup(@prov_idx, provider) |> Enum.map(fn {_, id} -> id end) |
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items = Enum.flat_map(ids, fn id -> |
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case :ets.lookup(@table, id) do |
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[{_, cb}] -> [cb] |
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[] -> [] |
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end |
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end) |
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{:reply, items, 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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:ets.delete_all_objects(@prov_idx) |
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:ets.delete_all_objects(@msg_idx) |
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{:reply, :ok, state} |
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end |
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end |