xref: /webtrees/app/SessionDatabaseHandler.php (revision 202c018b592d5a516e4a465dc6dc515f3be37399) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2023 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees;
21
22use Psr\Http\Message\ServerRequestInterface;
23use SessionHandlerInterface;
24
25use function date;
26use function time;
27
28/**
29 * Session handling - stores sessions in the database.
30 */
31class SessionDatabaseHandler implements SessionHandlerInterface
32{
33    private ServerRequestInterface $request;
34
35    private ?object $row = null;
36
37    /**
38     * @param ServerRequestInterface $request
39     */
40    public function __construct(ServerRequestInterface $request)
41    {
42        $this->request = $request;
43    }
44
45    /**
46     * @param string $path
47     * @param string $name
48     *
49     * @return bool
50     */
51    public function open(string $path, string $name): bool
52    {
53        return true;
54    }
55
56    /**
57     * @return bool
58     */
59    public function close(): bool
60    {
61        return true;
62    }
63
64    /**
65     * @param string $id
66     *
67     * @return string
68     */
69    public function read(string $id): string
70    {
71        $this->row = DB::table('session')
72            ->where('session_id', '=', $id)
73            ->first();
74
75
76        return $this->row->session_data ?? '';
77    }
78
79    /**
80     * @param string $id
81     * @param string $data
82     *
83     * @return bool
84     */
85    public function write(string $id, string $data): bool
86    {
87        $ip_address = Validator::attributes($this->request)->string('client-ip');
88        $user_id    = (int) Auth::id();
89        $now        = Registry::timestampFactory()->now();
90
91        if ($this->row === null) {
92            DB::table('session')->insert([
93                'session_id'   => $id,
94                'session_time' => $now->toDateTimeString(),
95                'user_id'      => $user_id,
96                'ip_address'   => $ip_address,
97                'session_data' => $data,
98            ]);
99        } else {
100            $updates = [];
101
102            // The user ID can change if we masquerade as another user.
103            if ((int) $this->row->user_id !== $user_id) {
104                $updates['user_id'] = $user_id;
105            }
106
107            if ($this->row->ip_address !== $ip_address) {
108                $updates['ip_address'] = $ip_address;
109            }
110
111            if ($this->row->session_data !== $data) {
112                $updates['session_data'] = $data;
113            }
114
115            // Only update session once a minute to reduce contention on the session table.
116            if ($now->subtractMinutes(1)->timestamp() > Registry::timestampFactory()->fromString($this->row->session_time)->timestamp()) {
117                $updates['session_time'] =  $now->toDateTimeString();
118            }
119
120            if ($updates !== []) {
121                DB::table('session')
122                    ->where('session_id', '=', $id)
123                    ->update($updates);
124            }
125        }
126
127        return true;
128    }
129
130    /**
131     * @param string $id
132     *
133     * @return bool
134     */
135    public function destroy(string $id): bool
136    {
137        DB::table('session')
138            ->where('session_id', '=', $id)
139            ->delete();
140
141        return true;
142    }
143
144    /**
145     * @param int $max_lifetime
146     *
147     * @return int
148     */
149    public function gc(int $max_lifetime): int
150    {
151        return DB::table('session')
152            ->where('session_time', '<', date('Y-m-d H:i:s', time() - $max_lifetime))
153            ->delete();
154    }
155}
156