Рефакторинг обработчиков. Часть 2 #21
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@@ -1,35 +1,114 @@
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%%%-------------------------------------------------------------------
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%%% @doc Обработчик подписки текущего пользователя (клиентский API).
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%%%
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%%% GET – получить информацию о подписке.
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%%% POST – активировать подписку или начать пробный период.
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%%% @end
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%%%-------------------------------------------------------------------
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-module(handler_subscription).
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-include("records.hrl").
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-behaviour(cowboy_handler).
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-export([init/2]).
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-export([trails/0]).
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-include("records.hrl").
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%%% cowboy_handler callback
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-spec init(cowboy_req:req(), any()) -> {ok, cowboy_req:req(), any()}.
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init(Req, Opts) ->
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handle(Req, Opts).
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%%% Swagger metadata
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-spec trails() -> [map()].
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trails() ->
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[
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#{ % GET
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path => <<"/v1/subscription">>,
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method => <<"GET">>,
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description => <<"Get current user subscription">>,
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tags => [<<"Subscription">>],
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responses => #{
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200 => #{
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description => <<"Subscription details">>,
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content => #{<<"application/json">> => #{schema => subscription_schema()}}
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},
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401 => #{description => <<"Unauthorized">>}
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}
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},
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#{ % POST
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path => <<"/v1/subscription">>,
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method => <<"POST">>,
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description => <<"Activate subscription or start trial">>,
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tags => [<<"Subscription">>],
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requestBody => #{
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required => true,
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content => #{<<"application/json">> => #{schema => #{
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type => object,
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required => [<<"action">>],
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properties => #{
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action => #{type => string, enum => [<<"start_trial">>, <<"activate">>]},
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plan => #{type => string, enum => [<<"monthly">>, <<"quarterly">>, <<"biannual">>, <<"annual">>]},
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payment_info => #{type => object, description => <<"Payment information">>}
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}
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}}}
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},
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responses => #{
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201 => #{description => <<"Subscription activated or trial started">>},
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400 => #{description => <<"Invalid action or JSON">>},
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402 => #{description => <<"Payment failed">>},
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409 => #{description => <<"Already has active subscription">>}
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}
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}
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].
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subscription_schema() ->
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#{
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type => object,
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properties => #{
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id => #{type => string},
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user_id => #{type => string},
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plan => #{type => string, enum => [<<"monthly">>, <<"quarterly">>, <<"biannual">>, <<"annual">>]},
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status => #{type => string, enum => [<<"active">>, <<"expired">>, <<"cancelled">>]},
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trial_used => #{type => boolean},
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started_at => #{type => string, format => <<"date-time">>},
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expires_at => #{type => string, format => <<"date-time">>},
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created_at => #{type => string, format => <<"date-time">>},
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updated_at => #{type => string, format => <<"date-time">>}
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}
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}.
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%%%===================================================================
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%%% HTTP-методы
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%%%===================================================================
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%% @private
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-spec handle(cowboy_req:req(), any()) -> {ok, cowboy_req:req(), any()}.
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handle(Req, _Opts) ->
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case cowboy_req:method(Req) of
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<<"GET">> -> get_subscription(Req);
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<<"GET">> -> get_subscription(Req);
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<<"POST">> -> create_subscription(Req);
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_ -> send_error(Req, 405, <<"Method not allowed">>)
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_ -> handler_utils:send_error(Req, 405, <<"Method not allowed">>)
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end.
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%% GET /v1/subscription - получить подписку текущего пользователя
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%% @doc GET /v1/subscription — получить подписку текущего пользователя.
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-spec get_subscription(cowboy_req:req()) -> {ok, binary(), cowboy_req:req()}.
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get_subscription(Req) ->
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case handler_auth:authenticate(Req) of
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case handler_utils:auth_user(Req) of
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{ok, UserId, Req1} ->
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case logic_subscription:get_user_subscription(UserId) of
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{ok, Subscription} ->
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send_json(Req1, 200, Subscription);
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handler_utils:send_json(Req1, 200, subscription_to_json(Subscription));
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{error, _} ->
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send_error(Req1, 500, <<"Internal server error">>)
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handler_utils:send_error(Req1, 500, <<"Internal server error">>)
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end;
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{error, Code, Message, Req1} ->
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send_error(Req1, Code, Message)
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handler_utils:send_error(Req1, Code, Message)
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end.
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%% POST /v1/subscription - активировать подписку
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%% @doc POST /v1/subscription — активировать подписку.
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-spec create_subscription(cowboy_req:req()) -> {ok, binary(), cowboy_req:req()}.
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create_subscription(Req) ->
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case handler_auth:authenticate(Req) of
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case handler_utils:auth_user(Req) of
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{ok, UserId, Req1} ->
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{ok, Body, Req2} = cowboy_req:read_body(Req1),
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try jsx:decode(Body, [return_maps]) of
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@@ -39,11 +118,11 @@ create_subscription(Req) ->
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case logic_subscription:start_trial(UserId) of
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{ok, Subscription} ->
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Response = subscription_to_json(Subscription),
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send_json(Req2, 201, Response);
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handler_utils:send_json(Req2, 201, Response);
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{error, already_has_subscription} ->
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send_error(Req2, 409, <<"Already has active subscription">>);
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handler_utils:send_error(Req2, 409, <<"Already has active subscription">>);
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{error, _} ->
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send_error(Req2, 500, <<"Internal server error">>)
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handler_utils:send_error(Req2, 500, <<"Internal server error">>)
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end;
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#{<<"action">> := <<"activate">>, <<"plan">> := PlanBin} ->
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Plan = parse_plan(PlanBin),
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@@ -51,54 +130,39 @@ create_subscription(Req) ->
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case logic_subscription:activate_subscription(UserId, Plan, PaymentInfo) of
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{ok, Subscription} ->
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Response = subscription_to_json(Subscription),
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send_json(Req2, 201, Response);
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handler_utils:send_json(Req2, 201, Response);
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{error, payment_failed} ->
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send_error(Req2, 402, <<"Payment failed">>);
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handler_utils:send_error(Req2, 402, <<"Payment failed">>);
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{error, _} ->
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send_error(Req2, 500, <<"Internal server error">>)
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handler_utils:send_error(Req2, 500, <<"Internal server error">>)
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end;
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_ ->
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send_error(Req2, 400, <<"Invalid action. Use 'start_trial' or 'activate'">>)
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handler_utils:send_error(Req2, 400, <<"Invalid action. Use 'start_trial' or 'activate'">>)
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end;
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_ ->
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send_error(Req2, 400, <<"Invalid JSON">>)
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handler_utils:send_error(Req2, 400, <<"Invalid JSON">>)
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catch
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_:_ ->
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send_error(Req2, 400, <<"Invalid JSON format">>)
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_:_ -> handler_utils:send_error(Req2, 400, <<"Invalid JSON format">>)
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end;
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{error, Code, Message, Req1} ->
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send_error(Req1, Code, Message)
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handler_utils:send_error(Req1, Code, Message)
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end.
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%% Вспомогательные функции
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parse_plan(<<"monthly">>) -> monthly;
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%%%===================================================================
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%%% Внутренние функции
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%%%===================================================================
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%% @private Преобразует бинарное имя плана в атом.
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-spec parse_plan(binary()) -> monthly | quarterly | biannual | annual.
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parse_plan(<<"monthly">>) -> monthly;
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parse_plan(<<"quarterly">>) -> quarterly;
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parse_plan(<<"biannual">>) -> biannual;
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parse_plan(<<"annual">>) -> annual;
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parse_plan(_) -> monthly.
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parse_plan(<<"biannual">>) -> biannual;
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parse_plan(<<"annual">>) -> annual;
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parse_plan(_) -> monthly.
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%% @private Формирует JSON-представление подписки (поддерживает как запись, так и карту).
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-spec subscription_to_json(#subscription{} | map()) -> map().
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subscription_to_json(Subscription) when is_tuple(Subscription) ->
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#{
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id => Subscription#subscription.id,
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plan => Subscription#subscription.plan,
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status => Subscription#subscription.status,
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trial_used => Subscription#subscription.trial_used,
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started_at => datetime_to_iso8601(Subscription#subscription.started_at),
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expires_at => datetime_to_iso8601(Subscription#subscription.expires_at)
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};
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handler_utils:subscription_to_json(Subscription);
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subscription_to_json(Subscription) when is_map(Subscription) ->
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Subscription.
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datetime_to_iso8601({{Year, Month, Day}, {Hour, Minute, Second}}) ->
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iolist_to_binary(io_lib:format("~4..0B-~2..0B-~2..0BT~2..0B:~2..0B:~2..0BZ",
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[Year, Month, Day, Hour, Minute, Second])).
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send_json(Req, Status, Data) ->
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Body = jsx:encode(Data),
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cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req),
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{ok, Body, []}.
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send_error(Req, Status, Message) ->
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Body = jsx:encode(#{error => Message}),
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cowboy_req:reply(Status, #{<<"content-type">> => <<"application/json">>}, Body, Req),
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{ok, Body, []}.
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Subscription.
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