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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>
61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
/* parse-time-vrp.cc - 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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#include "database-private.h"
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#include "parse-time-vrp.h"
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#include "parse-time-string.h"
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#define PREFIX "date:"
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/* See *ValueRangeProcessor in xapian-core/api/valuerangeproc.cc */
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Xapian::valueno
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ParseTimeValueRangeProcessor::operator() (std::string &begin, std::string &end)
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{
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time_t t, now;
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/* Require date: prefix in start of the range... */
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if (STRNCMP_LITERAL (begin.c_str (), PREFIX))
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return Xapian::BAD_VALUENO;
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/* ...and remove it. */
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begin.erase (0, sizeof (PREFIX) - 1);
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/* Use the same 'now' for begin and end. */
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if (time (&now) == (time_t) -1)
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return Xapian::BAD_VALUENO;
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if (!begin.empty ()) {
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if (parse_time_string (begin.c_str (), &t, &now, PARSE_TIME_ROUND_DOWN))
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return Xapian::BAD_VALUENO;
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begin.assign (Xapian::sortable_serialise ((double) t));
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}
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if (!end.empty ()) {
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if (parse_time_string (end.c_str (), &t, &now, PARSE_TIME_ROUND_UP_INCLUSIVE))
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return Xapian::BAD_VALUENO;
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end.assign (Xapian::sortable_serialise ((double) t));
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}
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return valno;
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}
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