Рефакторинг обработчиков. Часть 1 #21
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@@ -1,101 +1,136 @@
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-module(admin_handler_reviews).
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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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-export([init/2]).
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%%% cowboy_handler callback
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init(Req, _Opts) ->
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case cowboy_req:method(Req) of
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<<"GET">> -> list_reviews(Req);
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<<"GET">> -> list_reviews(Req);
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<<"PATCH">> -> bulk_update_reviews(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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%%% Swagger metadata
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trails() ->
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[
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#{ % GET list
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path => <<"/v1/admin/reviews">>,
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method => <<"GET">>,
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description => <<"List all reviews (admin)">>,
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tags => [<<"Reviews">>],
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parameters => [
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#{name => <<"target_type">>, in => <<"query">>, schema => #{type => string}, description => <<"calendar or event">>},
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#{name => <<"target_id">>, in => <<"query">>, schema => #{type => string}, description => <<"ID of target">>},
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#{name => <<"user_id">>, in => <<"query">>, schema => #{type => string}, description => <<"Filter by user">>},
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#{name => <<"status">>, in => <<"query">>, schema => #{type => string}, description => <<"visible, hidden, deleted, or all">>},
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#{name => <<"limit">>, in => <<"query">>, schema => #{type => integer}, description => <<"Page size">>},
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#{name => <<"offset">>, in => <<"query">>, schema => #{type => integer}, description => <<"Offset">>}
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],
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responses => #{
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200 => #{
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description => <<"Array of reviews">>,
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content => #{<<"application/json">> => #{schema => #{
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type => array,
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items => review_schema()
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}}}
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}
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}
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},
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#{ % PATCH bulk update
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path => <<"/v1/admin/reviews">>,
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method => <<"PATCH">>,
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description => <<"Bulk update review statuses">>,
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tags => [<<"Reviews">>],
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requestBody => #{
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required => true,
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content => #{<<"application/json">> => #{schema => #{
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type => array,
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items => #{
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type => object,
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properties => #{
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id => #{type => string},
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status => #{type => string, enum => [<<"visible">>, <<"hidden">>, <<"deleted">>]}
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}
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}
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}}}
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},
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responses => #{
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200 => #{description => <<"Number of updated reviews">>}
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}
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}
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].
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review_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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target_type => #{type => string, enum => [<<"calendar">>, <<"event">>]},
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target_id => #{type => string},
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rating => #{type => integer, minimum => 1, maximum => 5},
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comment => #{type => string},
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status => #{type => string, enum => [<<"visible">>, <<"hidden">>, <<"deleted">>]},
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reason => #{type => string, nullable => true},
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likes => #{type => integer},
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dislikes => #{type => integer},
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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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%%% Internal functions
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list_reviews(Req) ->
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case auth_admin(Req) of
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case handler_utils:auth_admin(Req) of
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{ok, _AdminId, Req1} ->
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Filters = parse_filters(Req1),
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Reviews = logic_review:list_admin_reviews(Filters),
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Json = [review_to_json(R) || R <- Reviews],
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send_json(Req1, 200, Json);
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Filters = parse_review_filters(Req1),
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Pagination = handler_utils:parse_pagination_params(Req1),
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{ok, Total, Reviews} = logic_review:list_admin_reviews(Filters, Pagination),
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Json = [handler_utils:review_to_json(R) || R <- Reviews],
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ExtraHeaders = pagination_headers(Pagination, Total),
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handler_utils:send_json(Req1, 200, Json, ExtraHeaders);
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{error, Code, Msg, Req1} ->
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send_error(Req1, Code, Msg)
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handler_utils:send_error(Req1, Code, Msg)
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end.
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bulk_update_reviews(Req) ->
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case auth_admin(Req) of
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case handler_utils:auth_admin(Req) of
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{ok, _AdminId, Req1} ->
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try
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{ok, Body, Req2} = cowboy_req:read_body(Req1),
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Operations = jsx:decode(Body, [return_maps]),
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true = is_list(Operations),
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case logic_review:bulk_update_status(Operations) of
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{ok, Count} ->
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send_json(Req2, 200, #{updated_count => Count});
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{ok, UpdatedCount} ->
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handler_utils:send_json(Req2, 200, #{updated_count => UpdatedCount});
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{error, Reason} ->
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send_error(Req2, 400, Reason)
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handler_utils:send_error(Req2, 400, Reason)
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end
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catch
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_:_ -> send_error(Req1, 400, <<"Invalid JSON body">>)
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_:_ -> handler_utils:send_error(Req1, 400, <<"Invalid JSON body">>)
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end;
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{error, Code, Msg, Req1} ->
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send_error(Req1, Code, Msg)
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handler_utils:send_error(Req1, Code, Msg)
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end.
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auth_admin(Req) ->
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case handler_auth:authenticate(Req) of
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{ok, AdminId, Req1} ->
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case admin_utils:is_admin(AdminId) of
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true -> {ok, AdminId, Req1};
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false -> {error, 403, <<"Admin access required">>, Req1}
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end;
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{error, Code, Msg, Req1} ->
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{error, Code, Msg, Req1}
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end.
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%% Извлечение параметров фильтрации из query string.
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%% Например: ?target_type=event&target_id=...&user_id=...
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parse_filters(Req) ->
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parse_review_filters(Req) ->
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Qs = cowboy_req:parse_qs(Req),
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lists:filtermap(
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fun
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({<<"target_type">>, Val}) -> {true, {target_type, Val}};
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({<<"target_id">>, Val}) -> {true, {target_id, Val}};
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({<<"user_id">>, Val}) -> {true, {user_id, Val}};
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(_) -> false
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end,
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Qs
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).
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review_to_json(R) ->
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#{
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id => R#review.id,
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user_id => R#review.user_id,
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target_type => R#review.target_type,
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target_id => R#review.target_id,
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rating => R#review.rating,
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comment => R#review.comment,
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status => R#review.status,
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created_at => datetime_to_iso8601(R#review.created_at),
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updated_at => datetime_to_iso8601(R#review.updated_at)
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target_type => proplists:get_value(<<"target_type">>, Qs),
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target_id => proplists:get_value(<<"target_id">>, Qs),
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user_id => proplists:get_value(<<"user_id">>, Qs),
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status => proplists:get_value(<<"status">>, Qs)
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}.
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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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datetime_to_iso8601(undefined) -> undefined.
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send_json(Req, Status, Data) ->
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Headers = #{
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<<"content-type">> => <<"application/json">>,
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<<"access-control-allow-origin">> => <<"*">>,
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<<"access-control-expose-headers">> => <<"Content-Range">>
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},
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Body = jsx:encode(Data),
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cowboy_req:reply(Status, Headers, 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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pagination_headers(#{limit := Limit, offset := Offset}, Total) ->
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RangeEnd = min(Offset + Limit - 1, Total - 1),
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#{
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<<"content-range">> => iolist_to_binary(io_lib:format("items ~B-~B/~B", [Offset, RangeEnd, Total])),
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<<"x-total-count">> => integer_to_binary(Total),
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<<"access-control-expose-headers">> => <<"Content-Range, X-Total-Count">>
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}.
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