transmission/libtransmission/torrent-ctor.cc

414 lines
8.8 KiB
C++

/*
* This file Copyright (C) 2009-2014 Mnemosyne LLC
*
* It may be used under the GNU GPL versions 2 or 3
* or any future license endorsed by Mnemosyne LLC.
*
*/
#include <cerrno> /* EINVAL */
#include <optional>
#include <string>
#include <vector>
#include "transmission.h"
#include "file.h"
#include "magnet-metainfo.h"
#include "session.h"
#include "torrent.h" /* tr_ctorGetSave() */
#include "tr-assert.h"
#include "utils.h" /* tr_new0 */
#include "variant.h"
using namespace std::literals;
struct optional_args
{
std::optional<bool> paused;
std::optional<uint16_t> peer_limit;
std::string download_dir;
};
/** Opaque class used when instantiating torrents.
* @ingroup tr_ctor */
struct tr_ctor
{
tr_session const* const session;
bool saveInOurTorrentsDir = false;
std::optional<bool> delete_source;
tr_priority_t priority = TR_PRI_NORMAL;
bool isSet_metainfo = false;
tr_variant metainfo = {};
std::string source_file;
struct optional_args optional_args[2];
std::string incomplete_dir;
std::vector<tr_file_index_t> want;
std::vector<tr_file_index_t> not_want;
std::vector<tr_file_index_t> low;
std::vector<tr_file_index_t> normal;
std::vector<tr_file_index_t> high;
explicit tr_ctor(tr_session const* session_in)
: session{ session_in }
{
}
};
/***
****
***/
static void setSourceFile(tr_ctor* ctor, char const* source_file)
{
ctor->source_file.assign(source_file ? source_file : "");
}
static void clearMetainfo(tr_ctor* ctor)
{
if (ctor->isSet_metainfo)
{
ctor->isSet_metainfo = false;
tr_variantFree(&ctor->metainfo);
}
setSourceFile(ctor, nullptr);
}
int tr_ctorSetMetainfo(tr_ctor* ctor, void const* metainfo, size_t len)
{
clearMetainfo(ctor);
auto const err = tr_variantFromBenc(&ctor->metainfo, metainfo, len);
ctor->isSet_metainfo = err == 0;
return err;
}
char const* tr_ctorGetSourceFile(tr_ctor const* ctor)
{
return ctor->source_file.c_str();
}
int tr_ctorSetMetainfoFromMagnetLink(tr_ctor* ctor, char const* magnet_link)
{
auto mm = tr_magnet_metainfo{};
if (!mm.parseMagnet(magnet_link ? magnet_link : ""))
{
return -1;
}
auto tmp = tr_variant{};
mm.toVariant(&tmp);
auto len = size_t{};
char* const str = tr_variantToStr(&tmp, TR_VARIANT_FMT_BENC, &len);
auto const err = tr_ctorSetMetainfo(ctor, (uint8_t const*)str, len);
tr_free(str);
tr_variantFree(&tmp);
return err;
}
int tr_ctorSetMetainfoFromFile(tr_ctor* ctor, char const* filename)
{
auto len = size_t{};
auto* const metainfo = tr_loadFile(filename, &len, nullptr);
auto err = int{};
if (metainfo != nullptr && len != 0)
{
err = tr_ctorSetMetainfo(ctor, metainfo, len);
}
else
{
clearMetainfo(ctor);
err = 1;
}
setSourceFile(ctor, filename);
/* if no `name' field was set, then set it from the filename */
if (ctor->isSet_metainfo)
{
tr_variant* info = nullptr;
if (tr_variantDictFindDict(&ctor->metainfo, TR_KEY_info, &info))
{
auto name = std::string_view{};
if (!tr_variantDictFindStrView(info, TR_KEY_name_utf_8, &name) &&
!tr_variantDictFindStrView(info, TR_KEY_name, &name))
{
name = ""sv;
}
if (std::empty(name))
{
char* base = tr_sys_path_basename(filename, nullptr);
if (base != nullptr)
{
tr_variantDictAddStr(info, TR_KEY_name, base);
tr_free(base);
}
}
}
}
tr_free(metainfo);
return err;
}
/***
****
***/
void tr_ctorSetFilePriorities(tr_ctor* ctor, tr_file_index_t const* files, tr_file_index_t fileCount, tr_priority_t priority)
{
switch (priority)
{
case TR_PRI_LOW:
ctor->low.assign(files, files + fileCount);
break;
case TR_PRI_HIGH:
ctor->high.assign(files, files + fileCount);
break;
default: // TR_PRI_NORMAL
ctor->normal.assign(files, files + fileCount);
break;
}
}
void tr_ctorInitTorrentPriorities(tr_ctor const* ctor, tr_torrent* tor)
{
for (auto file_index : ctor->low)
{
tr_torrentInitFilePriority(tor, file_index, TR_PRI_LOW);
}
for (auto file_index : ctor->normal)
{
tr_torrentInitFilePriority(tor, file_index, TR_PRI_NORMAL);
}
for (auto file_index : ctor->high)
{
tr_torrentInitFilePriority(tor, file_index, TR_PRI_HIGH);
}
}
void tr_ctorSetFilesWanted(tr_ctor* ctor, tr_file_index_t const* files, tr_file_index_t fileCount, bool wanted)
{
auto& indices = wanted ? ctor->want : ctor->not_want;
indices.assign(files, files + fileCount);
}
void tr_ctorInitTorrentWanted(tr_ctor const* ctor, tr_torrent* tor)
{
tr_torrentInitFileDLs(tor, std::data(ctor->not_want), std::size(ctor->not_want), false);
tr_torrentInitFileDLs(tor, std::data(ctor->want), std::size(ctor->want), true);
}
/***
****
***/
void tr_ctorSetDeleteSource(tr_ctor* ctor, bool delete_source)
{
ctor->delete_source = delete_source;
}
bool tr_ctorGetDeleteSource(tr_ctor const* ctor, bool* setme)
{
auto const& delete_source = ctor->delete_source;
if (!delete_source)
{
return false;
}
if (setme != nullptr)
{
*setme = *delete_source;
}
return true;
}
/***
****
***/
void tr_ctorSetSave(tr_ctor* ctor, bool saveInOurTorrentsDir)
{
ctor->saveInOurTorrentsDir = saveInOurTorrentsDir;
}
bool tr_ctorGetSave(tr_ctor const* ctor)
{
return ctor != nullptr && ctor->saveInOurTorrentsDir;
}
void tr_ctorSetPaused(tr_ctor* ctor, tr_ctorMode mode, bool paused)
{
TR_ASSERT(ctor != nullptr);
TR_ASSERT(mode == TR_FALLBACK || mode == TR_FORCE);
ctor->optional_args[mode].paused = paused;
}
void tr_ctorSetPeerLimit(tr_ctor* ctor, tr_ctorMode mode, uint16_t peer_limit)
{
TR_ASSERT(ctor != nullptr);
TR_ASSERT(mode == TR_FALLBACK || mode == TR_FORCE);
ctor->optional_args[mode].peer_limit = peer_limit;
}
void tr_ctorSetDownloadDir(tr_ctor* ctor, tr_ctorMode mode, char const* directory)
{
TR_ASSERT(ctor != nullptr);
TR_ASSERT(mode == TR_FALLBACK || mode == TR_FORCE);
ctor->optional_args[mode].download_dir.assign(directory ? directory : "");
}
void tr_ctorSetIncompleteDir(tr_ctor* ctor, char const* directory)
{
ctor->incomplete_dir.assign(directory ? directory : "");
}
bool tr_ctorGetPeerLimit(tr_ctor const* ctor, tr_ctorMode mode, uint16_t* setme)
{
auto const& peer_limit = ctor->optional_args[mode].peer_limit;
if (!peer_limit)
{
return false;
}
if (setme != nullptr)
{
*setme = *peer_limit;
}
return true;
}
bool tr_ctorGetPaused(tr_ctor const* ctor, tr_ctorMode mode, bool* setme)
{
auto const& paused = ctor->optional_args[mode].paused;
if (!paused)
{
return false;
}
if (setme != nullptr)
{
*setme = *paused;
}
return true;
}
bool tr_ctorGetDownloadDir(tr_ctor const* ctor, tr_ctorMode mode, char const** setme)
{
auto const& str = ctor->optional_args[mode].download_dir;
if (std::empty(str))
{
return false;
}
if (setme != nullptr)
{
*setme = str.c_str();
}
return true;
}
bool tr_ctorGetIncompleteDir(tr_ctor const* ctor, char const** setme)
{
auto const& str = ctor->incomplete_dir;
if (std::empty(str))
{
return false;
}
if (setme != nullptr)
{
*setme = str.c_str();
}
return true;
}
bool tr_ctorGetMetainfo(tr_ctor const* ctor, tr_variant const** setme)
{
if (!ctor->isSet_metainfo)
{
return false;
}
if (setme != nullptr)
{
*setme = &ctor->metainfo;
}
return true;
}
tr_session* tr_ctorGetSession(tr_ctor const* ctor)
{
return const_cast<tr_session*>(ctor->session);
}
/***
****
***/
static bool isPriority(int i)
{
return i == TR_PRI_LOW || i == TR_PRI_NORMAL || i == TR_PRI_HIGH;
}
void tr_ctorSetBandwidthPriority(tr_ctor* ctor, tr_priority_t priority)
{
if (isPriority(priority))
{
ctor->priority = priority;
}
}
tr_priority_t tr_ctorGetBandwidthPriority(tr_ctor const* ctor)
{
return ctor->priority;
}
/***
****
***/
tr_ctor* tr_ctorNew(tr_session const* session)
{
auto* const ctor = new tr_ctor{ session };
if (session != nullptr)
{
tr_ctorSetDeleteSource(ctor, tr_sessionGetDeleteSource(session));
tr_ctorSetPaused(ctor, TR_FALLBACK, tr_sessionGetPaused(session));
tr_ctorSetPeerLimit(ctor, TR_FALLBACK, session->peerLimitPerTorrent);
tr_ctorSetDownloadDir(ctor, TR_FALLBACK, tr_sessionGetDownloadDir(session));
}
tr_ctorSetSave(ctor, true);
return ctor;
}
void tr_ctorFree(tr_ctor* ctor)
{
clearMetainfo(ctor);
delete ctor;
}