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90cd1bac4e
Add a custom value range processor to enable date and time searches of the form date:since..until, where "since" and "until" are expressions understood by the previously added date/time parser, to restrict the results to messages within a particular time range (based on the Date: header). If "since" or "until" describes date/time at an accuracy of days or less, the values are rounded according to the accuracy, towards past for "since" and towards future for "until". For example, date:november..yesterday would match from the beginning of November until the end of yesterday. Expressions such as date:today..today means since the beginning of today until the end of today. Open-ended ranges are supported (since Xapian 1.2.1), i.e. you can specify date:..until or date:since.. to not limit the start or end date, respectively. CAVEATS: Xapian does not support spaces in range expressions. You can replace the spaces with '_', or (in most cases) '-', or (in some cases) leave the spaces out altogether. Entering date:expr without ".." (for example date:yesterday) will not work as you might expect. You can achieve the expected result by duplicating the expr both sides of ".." (for example date:yesterday..yesterday). Open-ended ranges won't work with pre-1.2.1 Xapian, but they don't produce an error either. Signed-off-by: Jani Nikula <jani@nikula.org>
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/* parse-time-vrp.h - date range query glue
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*
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* This file is part of notmuch.
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*
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* Copyright © 2012 Jani Nikula
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see http://www.gnu.org/licenses/ .
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*
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* Author: Jani Nikula <jani@nikula.org>
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*/
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#ifndef NOTMUCH_PARSE_TIME_VRP_H
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#define NOTMUCH_PARSE_TIME_VRP_H
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#include <xapian.h>
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/* see *ValueRangeProcessor in xapian-core/include/xapian/queryparser.h */
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class ParseTimeValueRangeProcessor : public Xapian::ValueRangeProcessor {
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protected:
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Xapian::valueno valno;
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public:
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ParseTimeValueRangeProcessor (Xapian::valueno slot_)
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: valno(slot_) { }
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Xapian::valueno operator() (std::string &begin, std::string &end);
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};
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#endif /* NOTMUCH_PARSE_TIME_VRP_H */
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