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filter.cc
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/
filter.cc
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/*
* Copyright (C) 2008 Nicolas Vion <nico@picapo.net>
*
* This file is part of Topy.
*
* Topy 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.
*
* Topy 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 Topy; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "filter.hh"
#include "groups_interface.hh"
#include <iostream>
bool parse_where(WordsParser *parser, Filter *filter, ClientResult &result) {
if (parser->current == "where") {
if (!filter->compile(parser)) {
result.error("[boolean expression error] " + filter->get_error());
result.send();
return false;
}
}
return true;
}
std::string Filter::get_error() {
return parser.get_error();
}
bool Filter::compile(WordsParser *words_parser) {
context.groups = &groups;
groups.lock();
expr = parser.parse(words_parser);
groups.unlock();
if (expr != NULL) {
words_parser->next();
return true;
}
return false;
}
bool Filter::eval(User *user) {
#ifdef USER_ID_STR
context.id = user->id;
#else
context.id = NULL;
#endif
context.group = user->group;
return expr->get(&context);
}
bool Filter::is_defined() {
return (expr != NULL);
}
Filter::Filter() : parser(&context) {
expr = NULL;
}
Filter::~Filter() {
if (expr != NULL)
delete expr;
}