mirror of https://github.com/Icinga/icinga2.git
121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2013 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "icinga/macroprocessor.h"
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#include "icinga/macroresolver.h"
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#include "base/utility.h"
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#include "base/array.h"
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#include "base/objectlock.h"
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#include "base/logger_fwd.h"
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#include <boost/tuple/tuple.hpp>
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#include <boost/smart_ptr/make_shared.hpp>
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#include <boost/foreach.hpp>
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using namespace icinga;
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Value MacroProcessor::ResolveMacros(const Value& str, const std::vector<MacroResolver::Ptr>& resolvers,
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const Dictionary::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn, const Array::Ptr& escapeMacros)
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{
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Value result;
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if (str.IsEmpty())
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return Empty;
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if (str.IsScalar()) {
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result = InternalResolveMacros(str, resolvers, cr, escapeFn, escapeMacros);
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} else if (str.IsObjectType<Array>()) {
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Array::Ptr resultArr = boost::make_shared<Array>();
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Array::Ptr arr = str;
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ObjectLock olock(arr);
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BOOST_FOREACH(const Value& arg, arr) {
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/* Note: don't escape macros here. */
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resultArr->Add(InternalResolveMacros(arg, resolvers, cr, EscapeCallback(), Array::Ptr()));
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}
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result = resultArr;
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} else {
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BOOST_THROW_EXCEPTION(std::invalid_argument("Command is not a string or array."));
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}
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return result;
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}
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bool MacroProcessor::ResolveMacro(const String& macro, const std::vector<MacroResolver::Ptr>& resolvers,
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const Dictionary::Ptr& cr, String *result)
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{
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BOOST_FOREACH(const MacroResolver::Ptr& resolver, resolvers) {
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if (resolver->ResolveMacro(macro, cr, result))
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return true;
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}
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return false;
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}
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String MacroProcessor::InternalResolveMacros(const String& str, const std::vector<MacroResolver::Ptr>& resolvers,
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const Dictionary::Ptr& cr, const MacroProcessor::EscapeCallback& escapeFn, const Array::Ptr& escapeMacros)
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{
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size_t offset, pos_first, pos_second;
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offset = 0;
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String result = str;
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while ((pos_first = result.FindFirstOf("$", offset)) != String::NPos) {
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pos_second = result.FindFirstOf("$", pos_first + 1);
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if (pos_second == String::NPos)
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BOOST_THROW_EXCEPTION(std::runtime_error("Closing $ not found in macro format string."));
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String name = result.SubStr(pos_first + 1, pos_second - pos_first - 1);
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String resolved_macro;
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bool found = ResolveMacro(name, resolvers, cr, &resolved_macro);
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/* $$ is an escape sequence for $. */
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if (name.IsEmpty()) {
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resolved_macro = "$";
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found = true;
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}
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if (!found)
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Log(LogWarning, "icinga", "Macro '" + name + "' is not defined.");
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if (escapeFn && escapeMacros) {
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bool escape = false;
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ObjectLock olock(escapeMacros);
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BOOST_FOREACH(const String& escapeMacro, escapeMacros) {
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if (escapeMacro == name) {
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escape = true;
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break;
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}
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}
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if (escape)
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resolved_macro = escapeFn(resolved_macro);
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}
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result.Replace(pos_first, pos_second - pos_first + 1, resolved_macro);
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offset = pos_first + resolved_macro.GetLength();
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}
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return result;
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}
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