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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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