transmission/libtransmission/announce-list.h

125 lines
3.1 KiB
C++

// This file Copyright © 2021-2022 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0), GPLv3 (SPDX: GPL-3.0),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
#pragma once
#if 0 // TODO(ckerr): re-enable this after tr_info is made private
#ifndef __TRANSMISSION__
#error only libtransmission should #include this header.
#endif
#endif
#include <cstddef>
#include <optional>
#include <set>
#include <string_view>
#include <vector>
#include "transmission.h"
#include "quark.h"
#include "interned-string.h"
#include "web-utils.h"
struct tr_error;
class tr_announce_list
{
public:
struct tracker_info
{
tr_url_parsed_t announce;
tr_url_parsed_t scrape;
tr_interned_string announce_str;
tr_interned_string scrape_str;
tr_interned_string host;
tr_tracker_tier_t tier = 0;
tr_tracker_id_t id = 0;
int compare(tracker_info const& that) const // <=>
{
if (this->tier != that.tier)
{
return this->tier < that.tier ? -1 : 1;
}
if (this->announce.full != that.announce.full)
{
return this->announce.full < that.announce.full ? -1 : 1;
}
return 0;
}
bool operator<(tracker_info const& that) const
{
return compare(that) < 0;
}
bool operator==(tracker_info const& that) const
{
return compare(that) == 0;
}
};
private:
using trackers_t = std::vector<tracker_info>;
public:
auto begin() const
{
return std::begin(trackers_);
}
auto end() const
{
return std::end(trackers_);
}
bool empty() const
{
return std::empty(trackers_);
}
size_t size() const
{
return std::size(trackers_);
}
tracker_info const& at(size_t i) const
{
return trackers_.at(i);
}
std::set<tr_tracker_tier_t> tiers() const;
tr_tracker_tier_t nextTier() const;
bool add(std::string_view announce_url_sv)
{
return add(announce_url_sv, this->nextTier());
}
bool add(std::string_view announce_url_sv, tr_tracker_tier_t tier);
bool remove(std::string_view announce_url);
bool remove(tr_tracker_id_t id);
bool replace(tr_tracker_id_t id, std::string_view announce_url_sv);
size_t set(char const* const* announce_urls, tr_tracker_tier_t const* tiers, size_t n);
void clear()
{
return trackers_.clear();
}
bool save(std::string const& torrent_file, tr_error** error = nullptr) const;
static std::optional<std::string> announceToScrape(std::string_view announce);
static tr_quark announceToScrape(tr_quark announce);
private:
tr_tracker_tier_t getTier(tr_tracker_tier_t tier, tr_url_parsed_t const& announce) const;
bool canAdd(tr_url_parsed_t const& announce);
static tr_tracker_id_t nextUniqueId();
trackers_t::iterator find(std::string_view announce);
trackers_t::iterator find(tr_tracker_id_t id);
trackers_t trackers_;
};