icinga2/lib/icinga/macroprocessor.cpp

109 lines
3.4 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License *
* as published by the Free Software Foundation; either version 2 *
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "i2-icinga.h"
using namespace icinga;
/**
* @threadsafety Always.
*/
Value MacroProcessor::ResolveMacros(const Value& cmd, const Dictionary::Ptr& macros)
{
Value result;
ASSERT(macros->IsSealed());
if (cmd.IsScalar()) {
result = InternalResolveMacros(cmd, macros);
} else if (cmd.IsObjectType<Dictionary>()) {
Dictionary::Ptr resultDict = boost::make_shared<Dictionary>();
Dictionary::Ptr dict = cmd;
ObjectLock olock(dict);
Value arg;
BOOST_FOREACH(tie(tuples::ignore, arg), dict) {
resultDict->Add(InternalResolveMacros(arg, macros));
}
result = resultDict;
} else {
BOOST_THROW_EXCEPTION(invalid_argument("Command is not a string or dictionary."));
}
return result;
}
/**
* @threadsafety Always.
*/
String MacroProcessor::InternalResolveMacros(const String& str, const Dictionary::Ptr& macros)
{
size_t offset, pos_first, pos_second;
offset = 0;
String result = str;
while ((pos_first = result.FindFirstOf("$", offset)) != String::NPos) {
pos_second = result.FindFirstOf("$", pos_first + 1);
if (pos_second == String::NPos)
BOOST_THROW_EXCEPTION(runtime_error("Closing $ not found in macro format string."));
String name = result.SubStr(pos_first + 1, pos_second - pos_first - 1);
if (!macros || !macros->Contains(name))
BOOST_THROW_EXCEPTION(runtime_error("Macro '" + name + "' is not defined."));
String value = macros->Get(name);
result.Replace(pos_first, pos_second - pos_first + 1, value);
offset = pos_first + value.GetLength();
}
return result;
}
/**
* @threadsafety Always.
*/
Dictionary::Ptr MacroProcessor::MergeMacroDicts(const vector<Dictionary::Ptr>& dicts)
{
Dictionary::Ptr result = boost::make_shared<Dictionary>();
BOOST_REVERSE_FOREACH(const Dictionary::Ptr& dict, dicts) {
if (!dict)
continue;
ObjectLock olock(dict);
String key;
Value value;
BOOST_FOREACH(tie(key, value), dict) {
if (!value.IsScalar())
continue;
result->Set(key, value);
}
}
result->Seal();
return result;
}