Implement commercial calendars: booking_open, specialists, expire without type downgrade.

Refs EventHub/EventHubBack#54

src/handlers/handler_calendar_by_id.erl

@@ -139,9 +139,13 @@ update_calendar(Req) ->
           Updates  = convert_calendar_fields(Updates0),
           case logic_calendar:update_calendar(UserId, CalendarId, Updates) of
             {ok, Calendar} ->
-              handler_utils:send_json(Req2, 200, handler_utils:calendar_to_json(Calendar));
+              Json0 = handler_utils:calendar_to_json(Calendar),
+              Following = logic_calendar_follow:is_following(UserId, CalendarId),
+              handler_utils:send_json(Req2, 200, Json0#{following => Following});
             {error, access_denied} ->
               handler_utils:send_error(Req2, 403, <<"Access denied">>);
+            {error, subscription_required} ->
+              handler_utils:send_error(Req2, 402, <<"Subscription required for commercial calendar">>);
             {error, not_found} ->
               handler_utils:send_error(Req2, 404, <<"Calendar not found">>);
             {error, _} ->
@@ -182,6 +186,8 @@ convert_calendar_fields(Updates) ->
 -spec convert_field({binary(), term()}) -> {atom(), term()}.
 convert_field({<<"title">>, Val})        -> {title, Val};
 convert_field({<<"description">>, Val})  -> {description, Val};
+convert_field({<<"type">>, <<"personal">>})   -> {type, personal};
+convert_field({<<"type">>, <<"commercial">>}) -> {type, commercial};
 convert_field({<<"type">>, Val})         -> {type, Val};
 convert_field({<<"confirmation">>, <<"auto">>})   -> {confirmation, auto};
 convert_field({<<"confirmation">>, <<"manual">>}) -> {confirmation, manual};