52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#pragma once
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#include "base/basic_types.h"
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namespace Export {
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// Message export uses a half-open interval: [from, till).
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// A non-positive bound means that side of the interval is unbounded.
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struct MessageDateRange {
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TimeId from = 0;
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TimeId till = 0;
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[[nodiscard]] bool hasFrom() const {
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return from > 0;
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}
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[[nodiscard]] bool hasTill() const {
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return till > 0;
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}
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[[nodiscard]] bool hasLimits() const {
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return hasFrom() || hasTill();
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}
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[[nodiscard]] bool valid() const {
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return !hasTill() || till > from;
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}
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// messages.search applies min_date strictly (date > min_date), while
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// this value object deliberately exposes an inclusive lower bound.
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[[nodiscard]] TimeId searchMinDate() const {
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return hasFrom() ? (from - 1) : 0;
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}
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[[nodiscard]] TimeId searchMaxDate() const {
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return hasTill() ? till : 0;
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}
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[[nodiscard]] bool contains(TimeId date) const {
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return (!hasFrom() || date >= from)
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&& (!hasTill() || date < till);
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}
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};
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} // namespace Export
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