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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.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;
import java.util.stream.Collectors;
/**
* Created by aalexeev on 11/18/16.
*/
@Repository
@ConditionalOnProperty(name = "spring.sql.init.platform", havingValue = "postgresql")
@Transactional(readOnly = true)
public class PostgreGINService 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 String sortHint(String escapedSearchString) {
boolean isOneWord = escapedSearchString.split("[^\\S\\+]+").length == 1;
return isOneWord ? " message_id desc" : String.format(" ts_rank(to_tsvector('russian', txt), websearch_to_tsquery('russian', '%s')) DESC, message_id desc", escapedSearchString);
}
@Override
public List<Integer> searchInAllMessages(User visitor, final String searchString, final int page) {
if (StringUtils.isBlank(searchString))
return Collections.emptyList();
String usersFilter = userService.getUserBLUsers(visitor.getUid()).stream().map(u -> String.valueOf(u.getUid())).collect(Collectors.joining(","));
var filter = usersFilter.isBlank() ?
"to_tsvector('russian', txt) @@ websearch_to_tsquery('russian', '" + escapeQuery(searchString) + "')"
: "to_tsvector('russian', txt) @@ websearch_to_tsquery('russian', '" + escapeQuery(searchString) + "') AND messages.user_id not in (" + usersFilter + ")";
var offset = page * maxResult;
var sql = String.format("""
SELECT messages.message_id FROM messages_txt inner join messages
on messages.message_id = messages_txt.message_id
WHERE %s
ORDER BY %s
LIMIT %d OFFSET %d
""", filter, sortHint(escapeQuery(searchString)), maxResult, offset);
return getJdbcTemplate().queryForList(sql, Integer.class);
}
@Override
public List<Integer> searchByStringAndUser(User visitor, final String searchString, final int userId, int page) {
if (StringUtils.isBlank(searchString))
return Collections.emptyList();
var offset = page * maxResult;
var sql = String.format("""
SELECT messages.message_id FROM messages_txt inner join messages
on messages.message_id = messages_txt.message_id
WHERE to_tsvector('russian', txt) @@ websearch_to_tsquery('russian', '%s') AND user_id=%d
ORDER BY %s
LIMIT %d OFFSET %d
""", escapeQuery(searchString), userId, sortHint(escapeQuery(searchString)), maxResult, offset);
return getJdbcTemplate().queryForList(sql, Integer.class);
}
@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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