bool set_fields_if_equals(doid_t do_id, const map_t &equals, map_t &values)
{
m_log->trace() << "Setting fields if equals on obj-" << do_id << endl;
YAML::Node document;
if(!load(do_id, document))
{
values.clear();
return false;
}
// Get current field values from the file
const Class* dcc = g_dcf->get_class_by_name(document["class"].as<string>());
ObjectData dbo(dcc->get_id());
YAML::Node existing = document["fields"];
for(auto it = existing.begin(); it != existing.end(); ++it)
{
const Field* field = dcc->get_field_by_name(it->first.as<string>());
if(!field)
{
m_log->warning() << "Field '" << it->first.as<string>()
<< "', loaded from '" << filename(do_id)
<< "', does not exist." << endl;
continue;
}
vector<uint8_t> value = read_yaml_field(field, it->second, do_id);
if(value.size() > 0)
{
dbo.fields[field] = value;
}
}
// Check if equals matches current values
bool fail = false;
for(auto it = equals.begin(); it != equals.end(); ++it)
{
auto found = dbo.fields.find(it->first);
if(found == dbo.fields.end())
{
values.erase(it->first);
fail = true;
}
else if(it->second != found->second)
{
values.erase(it->first);
fail = true;
}
}
// Return current values on failure
if(fail)
{
for(auto it = values.begin(); it != values.end(); ++it)
{
it->second = dbo.fields[it->first];
}
return false;
}
// Update existing values on success
for(auto it = values.begin(); it != values.end(); ++it)
{
dbo.fields[it->first] = it->second;
}
write_yaml_object(do_id, dcc, dbo);
return true;
}
/** Empty the cache. */
void clear()
{
map_.clear();
list_.clear();
size_ = 0;
}