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