mirror of
https://github.com/transmission/transmission
synced 2024-12-27 01:57:52 +00:00
404 lines
12 KiB
C++
404 lines
12 KiB
C++
// This file Copyright © 2012-2022 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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#include <array>
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#include <cstdlib> // EXIT_FAILURE
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#include <string>
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#include <string_view>
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#include <vector>
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#include <fmt/format.h>
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#include <libtransmission/transmission.h>
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#include <libtransmission/error.h>
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#include <libtransmission/log.h>
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#include <libtransmission/tr-getopt.h>
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#include <libtransmission/utils.h>
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#include <libtransmission/variant.h>
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#include <libtransmission/version.h>
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static char constexpr MyName[] = "transmission-edit";
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static char constexpr Usage[] = "Usage: transmission-edit [options] torrent-file(s)";
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struct app_options
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{
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std::vector<std::string_view> files;
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char const* add = nullptr;
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char const* deleteme = nullptr;
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std::array<char const*, 2> replace;
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char const* source = nullptr;
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bool show_version = false;
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};
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static auto constexpr Options = std::array<tr_option, 6>{
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{ { 'a', "add", "Add a tracker's announce URL", "a", true, "<url>" },
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{ 'd', "delete", "Delete a tracker's announce URL", "d", true, "<url>" },
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{ 'r', "replace", "Search and replace a substring in the announce URLs", "r", true, "<old> <new>" },
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{ 's', "source", "Set the source", "s", true, "<source>" },
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{ 'V', "version", "Show version number and exit", "V", false, nullptr },
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{ 0, nullptr, nullptr, nullptr, false, nullptr } }
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};
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static int parseCommandLine(app_options& opts, int argc, char const* const* argv)
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{
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int c;
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char const* optarg;
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while ((c = tr_getopt(Usage, argc, argv, std::data(Options), &optarg)) != TR_OPT_DONE)
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{
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switch (c)
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{
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case 'a':
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opts.add = optarg;
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break;
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case 'd':
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opts.deleteme = optarg;
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break;
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case 'r':
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opts.replace[0] = optarg;
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c = tr_getopt(Usage, argc, argv, std::data(Options), &optarg);
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if (c != TR_OPT_UNK)
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{
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return 1;
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}
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opts.replace[1] = optarg;
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break;
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case 's':
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opts.source = optarg;
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break;
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case 'V':
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opts.show_version = true;
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break;
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case TR_OPT_UNK:
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opts.files.push_back(optarg);
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break;
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default:
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return 1;
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}
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}
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return 0;
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}
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static bool removeURL(tr_variant* metainfo, std::string_view url)
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{
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auto sv = std::string_view{};
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tr_variant* announce_list;
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bool changed = false;
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if (tr_variantDictFindStrView(metainfo, TR_KEY_announce, &sv) && url == sv)
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{
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fmt::print("\tRemoved '{:s}' from 'announce'\n", sv);
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tr_variantDictRemove(metainfo, TR_KEY_announce);
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changed = true;
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}
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if (tr_variantDictFindList(metainfo, TR_KEY_announce_list, &announce_list))
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{
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tr_variant* tier;
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int tierIndex = 0;
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while ((tier = tr_variantListChild(announce_list, tierIndex)) != nullptr)
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{
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int nodeIndex = 0;
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tr_variant const* node;
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while ((node = tr_variantListChild(tier, nodeIndex)) != nullptr)
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{
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if (tr_variantGetStrView(node, &sv) && url == sv)
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{
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fmt::print("\tRemoved '{:s}' from 'announce-list' tier #{:d}\n", sv, tierIndex + 1);
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tr_variantListRemove(tier, nodeIndex);
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changed = true;
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}
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else
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{
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++nodeIndex;
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}
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}
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if (tr_variantListSize(tier) == 0)
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{
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fmt::print("\tNo URLs left in tier #{:d}... removing tier\n", tierIndex + 1);
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tr_variantListRemove(announce_list, tierIndex);
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}
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else
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{
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++tierIndex;
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}
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}
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if (tr_variantListSize(announce_list) == 0)
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{
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fmt::print("\tNo tiers left... removing announce-list\n");
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tr_variantDictRemove(metainfo, TR_KEY_announce_list);
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}
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}
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/* if we removed the "announce" field and there's still another track left,
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* use it as the "announce" field */
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if (changed && !tr_variantDictFindStrView(metainfo, TR_KEY_announce, &sv))
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{
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tr_variant* const tier = tr_variantListChild(announce_list, 0);
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if (tier != nullptr)
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{
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tr_variant const* const node = tr_variantListChild(tier, 0);
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if ((node != nullptr) && tr_variantGetStrView(node, &sv))
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{
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tr_variantDictAddStr(metainfo, TR_KEY_announce, sv);
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fmt::print("\tAdded '{:s}' to announce\n", sv);
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}
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}
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}
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return changed;
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}
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static std::string replaceSubstr(std::string_view str, std::string_view oldval, std::string_view newval)
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{
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auto ret = std::string{};
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while (!std::empty(str))
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{
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auto const pos = str.find(oldval);
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ret += str.substr(0, pos);
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if (pos == std::string_view::npos)
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{
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break;
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}
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ret += newval;
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str.remove_prefix(pos + std::size(oldval));
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}
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return ret;
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}
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static bool replaceURL(tr_variant* metainfo, std::string_view oldval, std::string_view newval)
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{
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auto sv = std::string_view{};
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tr_variant* announce_list;
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bool changed = false;
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if (tr_variantDictFindStrView(metainfo, TR_KEY_announce, &sv) && tr_strvContains(sv, oldval))
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{
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auto const newstr = replaceSubstr(sv, oldval, newval);
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fmt::print("\tReplaced in 'announce': '{:s}' --> '{:s}'\n", sv, newstr);
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tr_variantDictAddStr(metainfo, TR_KEY_announce, newstr);
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changed = true;
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}
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if (tr_variantDictFindList(metainfo, TR_KEY_announce_list, &announce_list))
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{
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tr_variant* tier;
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int tierCount = 0;
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while ((tier = tr_variantListChild(announce_list, tierCount)) != nullptr)
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{
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tr_variant* node;
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int nodeCount = 0;
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while ((node = tr_variantListChild(tier, nodeCount)) != nullptr)
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{
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if (tr_variantGetStrView(node, &sv) && tr_strvContains(sv, oldval))
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{
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auto const newstr = replaceSubstr(sv, oldval, newval);
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fmt::print("\tReplaced in 'announce-list' tier #{:d}: '{:s}' --> '{:s}'\n", tierCount + 1, sv, newstr);
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tr_variantClear(node);
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tr_variantInitStr(node, newstr);
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changed = true;
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}
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++nodeCount;
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}
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++tierCount;
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}
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}
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return changed;
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}
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static bool announce_list_has_url(tr_variant* announce_list, char const* url)
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{
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int tierCount = 0;
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tr_variant* tier;
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while ((tier = tr_variantListChild(announce_list, tierCount)) != nullptr)
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{
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int nodeCount = 0;
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tr_variant const* node;
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while ((node = tr_variantListChild(tier, nodeCount)) != nullptr)
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{
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if (auto sv = std::string_view{}; tr_variantGetStrView(node, &sv) && sv == url)
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{
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return true;
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}
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++nodeCount;
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}
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++tierCount;
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}
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return false;
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}
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static bool addURL(tr_variant* metainfo, char const* url)
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{
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auto announce = std::string_view{};
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tr_variant* announce_list = nullptr;
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bool changed = false;
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bool const had_announce = tr_variantDictFindStrView(metainfo, TR_KEY_announce, &announce);
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bool const had_announce_list = tr_variantDictFindList(metainfo, TR_KEY_announce_list, &announce_list);
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if (!had_announce && !had_announce_list)
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{
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/* this new tracker is the only one, so add it to "announce"... */
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fmt::print("\tAdded '{:s}' in 'announce'\n", url);
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tr_variantDictAddStr(metainfo, TR_KEY_announce, url);
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changed = true;
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}
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else
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{
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if (!had_announce_list)
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{
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announce_list = tr_variantDictAddList(metainfo, TR_KEY_announce_list, 2);
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if (had_announce)
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{
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/* we're moving from an 'announce' to an 'announce-list',
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* so copy the old announce URL to the list */
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tr_variant* tier = tr_variantListAddList(announce_list, 1);
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tr_variantListAddStr(tier, announce);
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changed = true;
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}
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}
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/* If the user-specified URL isn't in the announce list yet, add it */
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if (!announce_list_has_url(announce_list, url))
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{
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tr_variant* tier = tr_variantListAddList(announce_list, 1);
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tr_variantListAddStr(tier, url);
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fmt::print("\tAdded '{:s}' to 'announce-list' tier #{:d}\n", url, tr_variantListSize(announce_list));
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changed = true;
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}
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}
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return changed;
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}
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static bool setSource(tr_variant* metainfo, char const* source_value)
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{
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auto current_source = std::string_view{};
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bool const had_source = tr_variantDictFindStrView(metainfo, TR_KEY_source, ¤t_source);
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bool changed = false;
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if (!had_source)
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{
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fmt::print("\tAdded '{:s}' as source\n", source_value);
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tr_variantDictAddStr(metainfo, TR_KEY_source, source_value);
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changed = true;
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}
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else if (current_source.compare(source_value) != 0)
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{
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fmt::print("\tUpdated source: '{:s}' -> '{:s}'\n", current_source.data(), source_value);
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tr_variantDictAddStr(metainfo, TR_KEY_source, source_value);
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changed = true;
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}
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return changed;
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}
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int tr_main(int argc, char* argv[])
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{
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int changedCount = 0;
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tr_logSetLevel(TR_LOG_ERROR);
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auto options = app_options{};
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if (parseCommandLine(options, argc, (char const* const*)argv) != 0)
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{
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return EXIT_FAILURE;
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}
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if (options.show_version)
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{
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fmt::print(stderr, "{:s} {:s}\n", MyName, LONG_VERSION_STRING);
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return EXIT_SUCCESS;
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}
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if (std::empty(options.files))
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{
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fmt::print(stderr, "ERROR: No torrent files specified.\n");
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tr_getopt_usage(MyName, Usage, std::data(Options));
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fmt::print(stderr, "\n");
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return EXIT_FAILURE;
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}
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if (options.add == nullptr && options.deleteme == nullptr && options.replace[0] == nullptr && options.source == nullptr)
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{
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fmt::print(stderr, "ERROR: Must specify -a, -d, -r or -s\n");
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tr_getopt_usage(MyName, Usage, std::data(Options));
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fmt::print(stderr, "\n");
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return EXIT_FAILURE;
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}
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for (auto const& filename : options.files)
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{
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tr_variant top;
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bool changed = false;
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tr_error* error = nullptr;
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fmt::print("{:s}\n", filename);
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if (!tr_variantFromFile(&top, TR_VARIANT_PARSE_BENC, filename, &error))
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{
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fmt::print("\tError reading file: {:s}\n", error->message);
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tr_error_free(error);
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continue;
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}
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if (options.deleteme != nullptr)
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{
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changed |= removeURL(&top, options.deleteme);
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}
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if (options.add != nullptr)
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{
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changed = addURL(&top, options.add);
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}
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if (options.replace[0] != nullptr && options.replace[1] != nullptr)
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{
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changed |= replaceURL(&top, options.replace[0], options.replace[1]);
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}
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if (options.source != nullptr)
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{
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changed = setSource(&top, options.source);
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}
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if (changed)
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{
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++changedCount;
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tr_variantToFile(&top, TR_VARIANT_FMT_BENC, filename);
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}
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tr_variantClear(&top);
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}
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fmt::print("Changed {:d} files\n", changedCount);
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return EXIT_SUCCESS;
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}
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