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/*
* Copyright (C) 2008-2022, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.service;
import com.juick.model.User;
import org.apache.commons.lang3.StringUtils;
import org.postgresql.PGConnection;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import javax.inject.Inject;
import javax.sql.DataSource;
import java.sql.SQLException;
import java.util.Collections;
import java.util.List;
/**
* Created by aalexeev on 11/18/16.
*/
@Repository
@ConditionalOnProperty(name = "spring.sql.init.platform", havingValue = "postgresql")
@Transactional(readOnly = true)
public class PostgresSearchService extends BaseJdbcService implements SearchService {
private static final int DEFAULT_MAX_RESULT = 20;
private int maxResult = DEFAULT_MAX_RESULT;
@Inject
UserService userService;
@Inject
DataSource dataSource;
private String escapeQuery(String searchString) {
try (var connection = dataSource.getConnection()) {
var pg = connection.unwrap(PGConnection.class);
return pg.escapeLiteral(searchString);
} catch (SQLException e) {
e.printStackTrace();
}
return searchString;
}
public List<Integer> search(final int visitorId, final int userId, final String searchString, final int page) {
var usersFilter = userService.getUserBLUsers(visitorId).stream().map(User::getUid).toList();
var offset = page * maxResult;
var query = escapeQuery(searchString);
var isOneWord = query.split("[^\\S\\+]+").length == 1;
var sql = """
SELECT
message_id
FROM
(
select
message_id, user_id, txt,
to_tsvector('russian', txt) v,
websearch_to_tsquery('russian', :query) q
from messages
) t
WHERE
v @@ q
"""
+ ( userId > 0 ? "AND user_id = :user_id" : "" ) +
"""
"""
+ (usersFilter.isEmpty() ? "" : " AND user_id NOT IN (:filter)") +
"""
ORDER BY
"""
+ (isOneWord ? "message_id DESC" : "ts_rank_cd(v, q) DESC, message_id DESC") +
"""
LIMIT :limit OFFSET :offset
""";
return getNamedParameterJdbcTemplate().queryForList(sql,
new MapSqlParameterSource()
.addValue("query", escapeQuery(searchString))
.addValue("user_id", userId)
.addValue("filter", usersFilter)
.addValue("limit", maxResult)
.addValue("offset", offset), Integer.class);
}
@Override
public List<Integer> searchInAllMessages(User visitor, final String searchString, final int page) {
if (StringUtils.isBlank(searchString))
return Collections.emptyList();
return search(visitor.getUid(), -1, searchString, page);
}
@Override
public List<Integer> searchByStringAndUser(User visitor, final String searchString, final int userId, int page) {
if (StringUtils.isBlank(searchString))
return Collections.emptyList();
return search(visitor.getUid(), userId, searchString, page);
}
@Override
public void setMaxResult(int maxResult) {
if (maxResult <= 0)
throw new IllegalArgumentException("maxResult value (" + maxResult + ") must be greater then 0");
this.maxResult = maxResult;
}
}
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