119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/*
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Minetest
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Copyright (C) 2017-8 rubenwardy <rw@rubenwardy.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "itemstackmetadata.h"
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#include "util/serialize.h"
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#include "util/strfnd.h"
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#include <algorithm>
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#define DESERIALIZE_START '\x01'
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#define DESERIALIZE_KV_DELIM '\x02'
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#define DESERIALIZE_PAIR_DELIM '\x03'
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#define DESERIALIZE_START_STR "\x01"
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#define DESERIALIZE_KV_DELIM_STR "\x02"
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#define DESERIALIZE_PAIR_DELIM_STR "\x03"
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#define TOOLCAP_KEY "tool_capabilities"
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void ItemStackMetadata::clear()
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{
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Metadata::clear();
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updateToolCapabilities();
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}
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static void sanitize_string(std::string &str)
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{
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str.erase(std::remove(str.begin(), str.end(), DESERIALIZE_START), str.end());
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str.erase(std::remove(str.begin(), str.end(), DESERIALIZE_KV_DELIM), str.end());
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str.erase(std::remove(str.begin(), str.end(), DESERIALIZE_PAIR_DELIM), str.end());
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}
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bool ItemStackMetadata::setString(const std::string &name, const std::string &var)
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{
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std::string clean_name = name;
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std::string clean_var = var;
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sanitize_string(clean_name);
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sanitize_string(clean_var);
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bool result = Metadata::setString(clean_name, clean_var);
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if (clean_name == TOOLCAP_KEY)
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updateToolCapabilities();
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return result;
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}
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void ItemStackMetadata::serialize(std::ostream &os) const
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{
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std::ostringstream os2(std::ios_base::binary);
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os2 << DESERIALIZE_START;
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for (const auto &stringvar : m_stringvars) {
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if (!stringvar.first.empty() || !stringvar.second.empty())
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os2 << stringvar.first << DESERIALIZE_KV_DELIM
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<< stringvar.second << DESERIALIZE_PAIR_DELIM;
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}
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os << serializeJsonStringIfNeeded(os2.str());
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}
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void ItemStackMetadata::deSerialize(std::istream &is)
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{
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std::string in = deSerializeJsonStringIfNeeded(is);
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m_stringvars.clear();
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if (!in.empty()) {
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if (in[0] == DESERIALIZE_START) {
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Strfnd fnd(in);
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fnd.to(1);
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while (!fnd.at_end()) {
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std::string name = fnd.next(DESERIALIZE_KV_DELIM_STR);
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std::string var = fnd.next(DESERIALIZE_PAIR_DELIM_STR);
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m_stringvars[name] = var;
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}
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} else {
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// BACKWARDS COMPATIBILITY
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m_stringvars[""] = in;
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}
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}
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updateToolCapabilities();
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}
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void ItemStackMetadata::updateToolCapabilities()
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{
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if (contains(TOOLCAP_KEY)) {
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toolcaps_overridden = true;
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toolcaps_override = ToolCapabilities();
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std::istringstream is(getString(TOOLCAP_KEY));
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toolcaps_override.deserializeJson(is);
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} else {
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toolcaps_overridden = false;
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}
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}
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void ItemStackMetadata::setToolCapabilities(const ToolCapabilities &caps)
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{
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std::ostringstream os;
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caps.serializeJson(os);
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setString(TOOLCAP_KEY, os.str());
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}
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void ItemStackMetadata::clearToolCapabilities()
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{
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setString(TOOLCAP_KEY, "");
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}
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