60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
// This file Copyright © Mnemosyne LLC.
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// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
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// or any future license endorsed by Mnemosyne LLC.
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// License text can be found in the licenses/ folder.
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#pragma once
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#include <array>
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#include <cstddef> // for size_t
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#include <ctime> // for time_t
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#include <string_view>
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#include "libtransmission/file.h" // tr_sys_file_t
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class tr_session_id
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{
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public:
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using current_time_func_t = time_t (*)();
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explicit tr_session_id(current_time_func_t get_current_time)
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: get_current_time_{ get_current_time }
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{
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}
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tr_session_id(tr_session_id&&) = delete;
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tr_session_id(tr_session_id const&) = delete;
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tr_session_id& operator=(tr_session_id&&) = delete;
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tr_session_id& operator=(tr_session_id const&) = delete;
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~tr_session_id();
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/**
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* Check if session ID corresponds to session running on the same machine as
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* the caller.
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*
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* This is useful for various behavior alterations, such as transforming
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* relative paths to absolute before passing through RPC, or presenting
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* different UI for local and remote sessions.
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*/
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[[nodiscard]] static bool is_local(std::string_view) noexcept;
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// current session identifier
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[[nodiscard]] std::string_view sv() const noexcept;
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[[nodiscard]] char const* c_str() const noexcept;
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private:
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static auto constexpr SessionIdSize = size_t{ 48 };
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static auto constexpr SessionIdDurationSec = time_t{ 60 * 60 }; /* expire in an hour */
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using session_id_t = std::array<char, SessionIdSize + 1>; // add one for '\0'
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[[nodiscard]] static session_id_t make_session_id();
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current_time_func_t const get_current_time_;
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mutable session_id_t current_value_ = {};
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mutable session_id_t previous_value_ = {};
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mutable tr_sys_file_t current_lock_file_ = TR_BAD_SYS_FILE;
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mutable tr_sys_file_t previous_lock_file_ = TR_BAD_SYS_FILE;
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mutable time_t expires_at_ = 0;
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};
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