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Add ModMetadata API (#5131)

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* mod can create a ModMetadata object where store its values and retrieve it.
* Modmetadata object can only be fetched at mod loading
* Save when modified using same time as map interval or at server stop
* add helper function to get mod storage path
* ModMetadata has exactly same calls than all every other Metadata
This commit is contained in:
Loïc Blot 2017-02-08 00:15:55 +01:00 • committed by GitHub
parent 0680c47d6c
commit ef6feca501
12 changed files with 384 additions and 12 deletions
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80
src/mods.cpp
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@ -21,13 +21,10 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <fstream>
#include "mods.h"
#include "filesys.h"
#include "util/strfnd.h"
#include "log.h"
#include "subgame.h"
#include "settings.h"
#include "util/strfnd.h"
#include "convert_json.h"
#include "exceptions.h"
static bool parseDependsLine(std::istream &is,
std::string &dep, std::set<char> &symbols)
@ -356,3 +353,80 @@ Json::Value getModstoreUrl(std::string url)
}
#endif
ModMetadata::ModMetadata(const std::string &mod_name):
m_mod_name(mod_name),
m_modified(false)
{
m_stringvars.clear();
}
void ModMetadata::clear()
{
Metadata::clear();
m_modified = true;
}
bool ModMetadata::save(const std::string &root_path)
{
Json::Value json;
for (StringMap::const_iterator it = m_stringvars.begin();
it != m_stringvars.end(); ++it) {
json[it->first] = it->second;
}
if (!fs::PathExists(root_path)) {
if (!fs::CreateAllDirs(root_path)) {
errorstream << "ModMetadata[" << m_mod_name << "]: Unable to save. '"
<< root_path << "' tree cannot be created." << std::endl;
return false;
}
} else if (!fs::IsDir(root_path)) {
errorstream << "ModMetadata[" << m_mod_name << "]: Unable to save. '"
<< root_path << "' is not a directory." << std::endl;
return false;
}
bool w_ok = fs::safeWriteToFile(root_path + DIR_DELIM + m_mod_name,
Json::FastWriter().write(json));
if (w_ok) {
m_modified = false;
} else {
errorstream << "ModMetadata[" << m_mod_name << "]: failed write file." << std::endl;
}
return w_ok;
}
bool ModMetadata::load(const std::string &root_path)
{
m_stringvars.clear();
std::ifstream is((root_path + DIR_DELIM + m_mod_name).c_str(), std::ios_base::binary);
if (!is.good()) {
return false;
}
Json::Reader reader;
Json::Value root;
if (!reader.parse(is, root)) {
errorstream << "ModMetadata[" << m_mod_name << "]: failed read data "
"(Json decoding failure)." << std::endl;
return false;
}
const Json::Value::Members attr_list = root.getMemberNames();
for (Json::Value::Members::const_iterator it = attr_list.begin();
it != attr_list.end(); ++it) {
Json::Value attr_value = root[*it];
m_stringvars[*it] = attr_value.asString();
}
return true;
}
bool ModMetadata::setString(const std::string &name, const std::string &var)
{
m_modified = Metadata::setString(name, var);
return m_modified;
}