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lib: add thread subqueries.

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This change allows queries of the form

 thread:{from:me} and thread:{from:jian} and not thread:{from:dave}

This is still somewhat brute-force, but it's a big improvement over
both the shell script solution and the previous proposal [1], because it
does not build the whole thread structure just generate a
query. A further potential optimization is to replace the calls to
notmuch with more specialized Xapian code; in particular it's not
likely that reading all of the message metadata is a win here.

[1]: id:20170820213240.20526-1-david@tethera.net
This commit is contained in:
David Bremner 2017-08-20 18:32:40 -03:00
parent 68e753a21f
commit 4f5bbaf7e2
4 changed files with 117 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
lib/Makefile.local
View file

@ -58,7 +58,8 @@ libnotmuch_cxx_srcs = \
$(dir)/query-fp.cc \
$(dir)/config.cc \
$(dir)/regexp-fields.cc \
$(dir)/thread.cc
$(dir)/thread.cc \
$(dir)/thread-fp.cc
libnotmuch_modules := $(libnotmuch_c_srcs:.c=.o) $(libnotmuch_cxx_srcs:.cc=.o)

6
lib/database.cc
View file

@ -21,6 +21,7 @@
#include "database-private.h"
#include "parse-time-vrp.h"
#include "query-fp.h"
#include "thread-fp.h"
#include "regexp-fields.h"
#include "string-util.h"
@ -258,7 +259,8 @@ prefix_t prefix_table[] = {
{ "directory", "XDIRECTORY", NOTMUCH_FIELD_NO_FLAGS },
{ "file-direntry", "XFDIRENTRY", NOTMUCH_FIELD_NO_FLAGS },
{ "directory-direntry", "XDDIRENTRY", NOTMUCH_FIELD_NO_FLAGS },
{ "thread", "G", NOTMUCH_FIELD_EXTERNAL },
{ "thread", "G", NOTMUCH_FIELD_EXTERNAL |
NOTMUCH_FIELD_PROCESSOR },
{ "tag", "K", NOTMUCH_FIELD_EXTERNAL |
NOTMUCH_FIELD_PROCESSOR },
{ "is", "K", NOTMUCH_FIELD_EXTERNAL |
@ -317,6 +319,8 @@ _setup_query_field (const prefix_t *prefix, notmuch_database_t *notmuch)
fp = (new DateFieldProcessor())->release ();
else if (STRNCMP_LITERAL(prefix->name, "query") == 0)
fp = (new QueryFieldProcessor (*notmuch->query_parser, notmuch))->release ();
else if (STRNCMP_LITERAL(prefix->name, "thread") == 0)
fp = (new ThreadFieldProcessor (*notmuch->query_parser, notmuch))->release ();
else
fp = (new RegexpFieldProcessor (prefix->name, prefix->flags,
*notmuch->query_parser, notmuch))->release ();

68
lib/thread-fp.cc Normal file
View file

@ -0,0 +1,68 @@
/* thread-fp.cc - "thread:" field processor glue
*
* This file is part of notmuch.
*
* Copyright © 2017 David Bremner
*
* 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 3 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, see https://www.gnu.org/licenses/ .
*
* Author: David Bremner <david@tethera.net>
*/
#include "database-private.h"
#include "thread-fp.h"
#include <iostream>
#if HAVE_XAPIAN_FIELD_PROCESSOR
Xapian::Query
ThreadFieldProcessor::operator() (const std::string & str)
{
notmuch_status_t status;
if (str.at (0) == '{') {
if (str.length() > 1 && str.at (str.size () - 1) == '}'){
std::string subquery_str = str.substr(1,str.size () - 2);
notmuch_query_t *subquery = notmuch_query_create (notmuch, subquery_str.c_str());
notmuch_messages_t *messages;
std::set<std::string> terms;
if (!subquery)
throw Xapian::QueryParserError ("failed to create subquery for '" + subquery_str + "'");
status = notmuch_query_search_messages (subquery, &messages);
if (status)
throw Xapian::QueryParserError ("failed to search messages for '" + subquery_str + "'");
for (; notmuch_messages_valid (messages); notmuch_messages_move_to_next (messages)) {
std::string term = "G";
notmuch_message_t *message;
message = notmuch_messages_get (messages);
term += notmuch_message_get_thread_id (message);
terms.insert (term);
}
return Xapian::Query (Xapian::Query::OP_OR, terms.begin(), terms.end());
} else {
throw Xapian::QueryParserError ("missing } in '" + str + "'");
}
} else {
/* literal thread id */
std::string term = "G"+str;
return Xapian::Query (term);
}
}
#endif

42
lib/thread-fp.h Normal file
View file

@ -0,0 +1,42 @@
/* thread-fp.h - thread field processor glue
*
* This file is part of notmuch.
*
* Copyright © 2017 David Bremner
*
* 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 3 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, see https://www.gnu.org/licenses/ .
*
* Author: David Bremner <david@tethera.net>
*/
#ifndef NOTMUCH_THREAD_FP_H
#define NOTMUCH_THREAD_FP_H
#include <xapian.h>
#include "notmuch.h"
#if HAVE_XAPIAN_FIELD_PROCESSOR
class ThreadFieldProcessor : public Xapian::FieldProcessor {
protected:
Xapian::QueryParser &parser;
notmuch_database_t *notmuch;
public:
ThreadFieldProcessor (Xapian::QueryParser &parser_, notmuch_database_t *notmuch_)
: parser(parser_), notmuch(notmuch_) { };
Xapian::Query operator()(const std::string & str);
};
#endif
#endif /* NOTMUCH_THREAD_FP_H */