summaryrefslogtreecommitdiff
path: root/lib/installer.php
blob: 589a19a66ebc041cc3ca65e12c01e99a794ce688 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
<?php

/**
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2009, StatusNet, Inc.
 *
 * 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/>.
 *
 * @category Installation
 * @package  Installation
 *
 * @author   Adrian Lang <mail@adrianlang.de>
 * @author   Brenda Wallace <shiny@cpan.org>
 * @author   Brett Taylor <brett@webfroot.co.nz>
 * @author   Brion Vibber <brion@pobox.com>
 * @author   CiaranG <ciaran@ciarang.com>
 * @author   Craig Andrews <candrews@integralblue.com>
 * @author   Eric Helgeson <helfire@Erics-MBP.local>
 * @author   Evan Prodromou <evan@status.net>
 * @author   Robin Millette <millette@controlyourself.ca>
 * @author   Sarven Capadisli <csarven@status.net>
 * @author   Tom Adams <tom@holizz.com>
 * @author   Zach Copley <zach@status.net>
 * @license  GNU Affero General Public License http://www.gnu.org/licenses/
 * @version  0.9.x
 * @link     http://status.net
 */

abstract class Installer
{
    /** Web site info */
    public $sitename, $server, $path, $fancy;
    /** DB info */
    public $host, $dbname, $dbtype, $username, $password, $db;
    /** Administrator info */
    public $adminNick, $adminPass, $adminEmail, $adminUpdates;
    /** Should we skip writing the configuration file? */
    public $skipConfig = false;

    public static $dbModules = array(
        'mysql' => array(
            'name' => 'MySQL',
            'check_module' => 'mysqli',
            'installer' => 'mysql_db_installer',
        ),
        'pgsql' => array(
            'name' => 'PostgreSQL',
            'check_module' => 'pgsql',
            'installer' => 'pgsql_db_installer',
        ),
    );

    /**
     * Attempt to include a PHP file and report if it worked, while
     * suppressing the annoying warning messages on failure.
     */
    private function haveIncludeFile($filename) {
        $old = error_reporting(error_reporting() & ~E_WARNING);
        $ok = include_once($filename);
        error_reporting($old);
        return $ok;
    }
    
    /**
     * Check if all is ready for installation
     *
     * @return void
     */
    function checkPrereqs()
    {
        $pass = true;

        if (file_exists(INSTALLDIR.'/config.php')) {
            $this->warning('Config file "config.php" already exists.');
            $pass = false;
        }

        if (version_compare(PHP_VERSION, '5.2.3', '<')) {
            $errors[] = 'Require PHP version 5.2.3 or greater.';
            $pass = false;
        }

        // Look for known library bugs
        $str = "abcdefghijklmnopqrstuvwxyz";
        $replaced = preg_replace('/[\p{Cc}\p{Cs}]/u', '*', $str);
        if ($str != $replaced) {
            $this->warning('PHP is linked to a version of the PCRE library ' .
                           'that does not support Unicode properties. ' .
                           'If you are running Red Hat Enterprise Linux / ' .
                           'CentOS 5.4 or earlier, see <a href="' .
                           'http://status.net/wiki/Red_Hat_Enterprise_Linux#PCRE_library' .
                           '">our documentation page</a> on fixing this.');
            $pass = false;
        }

        $reqs = array('gd', 'curl',
                      'xmlwriter', 'mbstring', 'xml', 'dom', 'simplexml');

        foreach ($reqs as $req) {
            if (!$this->checkExtension($req)) {
                $this->warning(sprintf('Cannot load required extension: <code>%s</code>', $req));
                $pass = false;
            }
        }

        // Make sure we have at least one database module available
        $missingExtensions = array();
        foreach (self::$dbModules as $type => $info) {
            if (!$this->checkExtension($info['check_module'])) {
                $missingExtensions[] = $info['check_module'];
            }
        }

        if (count($missingExtensions) == count(self::$dbModules)) {
            $req = implode(', ', $missingExtensions);
            $this->warning(sprintf('Cannot find a database extension. You need at least one of %s.', $req));
            $pass = false;
        }

        if (!is_writable(INSTALLDIR)) {
            $this->warning(sprintf('Cannot write config file to: <code>%s</code></p>', INSTALLDIR),
                           sprintf('On your server, try this command: <code>chmod a+w %s</code>', INSTALLDIR));
            $pass = false;
        }

        // Check the subdirs used for file uploads
        $fileSubdirs = array('avatar', 'background', 'file');
        foreach ($fileSubdirs as $fileSubdir) {
            $fileFullPath = INSTALLDIR."/$fileSubdir/";
            if (!is_writable($fileFullPath)) {
                $this->warning(sprintf('Cannot write to %s directory: <code>%s</code>', $fileSubdir, $fileFullPath),
                               sprintf('On your server, try this command: <code>chmod a+w %s</code>', $fileFullPath));
                $pass = false;
            }
        }

        return $pass;
    }

    /**
     * Checks if a php extension is both installed and loaded
     *
     * @param string $name of extension to check
     *
     * @return boolean whether extension is installed and loaded
     */
    function checkExtension($name)
    {
        if (extension_loaded($name)) {
            return true;
        } elseif (function_exists('dl') && ini_get('enable_dl') && !ini_get('safe_mode')) {
            // dl will throw a fatal error if it's disabled or we're in safe mode.
            // More fun, it may not even exist under some SAPIs in 5.3.0 or later...
            $soname = $name . '.' . PHP_SHLIB_SUFFIX;
            if (PHP_SHLIB_SUFFIX == 'dll') {
                $soname = "php_" . $soname;
            }
            return @dl($soname);
        } else {
            return false;
        }
    }

    /**
     * Basic validation on the database paramters
     * Side effects: error output if not valid
     * 
     * @return boolean success
     */
    function validateDb()
    {
        $fail = false;

        if (empty($this->host)) {
            $this->updateStatus("No hostname specified.", true);
            $fail = true;
        }

        if (empty($this->database)) {
            $this->updateStatus("No database specified.", true);
            $fail = true;
        }

        if (empty($this->username)) {
            $this->updateStatus("No username specified.", true);
            $fail = true;
        }

        if (empty($this->sitename)) {
            $this->updateStatus("No sitename specified.", true);
            $fail = true;
        }

        return !$fail;
    }

    /**
     * Basic validation on the administrator user paramters
     * Side effects: error output if not valid
     * 
     * @return boolean success
     */
    function validateAdmin()
    {
        $fail = false;

        if (empty($this->adminNick)) {
            $this->updateStatus("No initial StatusNet user nickname specified.", true);
            $fail = true;
        }
        if ($this->adminNick && !preg_match('/^[0-9a-z]{1,64}$/', $this->adminNick)) {
            $this->updateStatus('The user nickname "' . htmlspecialchars($this->adminNick) .
                         '" is invalid; should be plain letters and numbers no longer than 64 characters.', true);
            $fail = true;
        }
        // @fixme hardcoded list; should use User::allowed_nickname()
        // if/when it's safe to have loaded the infrastructure here
        $blacklist = array('main', 'admin', 'twitter', 'settings', 'rsd.xml', 'favorited', 'featured', 'favoritedrss', 'featuredrss', 'rss', 'getfile', 'api', 'groups', 'group', 'peopletag', 'tag', 'user', 'message', 'conversation', 'bookmarklet', 'notice', 'attachment', 'search', 'index.php', 'doc', 'opensearch', 'robots.txt', 'xd_receiver.html', 'facebook');
        if (in_array($this->adminNick, $blacklist)) {
            $this->updateStatus('The user nickname "' . htmlspecialchars($this->adminNick) .
                         '" is reserved.', true);
            $fail = true;
        }

        if (empty($this->adminPass)) {
            $this->updateStatus("No initial StatusNet user password specified.", true);
            $fail = true;
        }

        return !$fail;
    }

    /**
     * Set up the database with the appropriate function for the selected type...
     * Saves database info into $this->db.
     * 
     * @return mixed array of database connection params on success, false on failure
     */
    function setupDatabase()
    {
        if ($this->db) {
            throw new Exception("Bad order of operations: DB already set up.");
        }
        $method = self::$dbModules[$this->dbtype]['installer'];
        $db = call_user_func(array($this, $method),
                             $this->host,
                             $this->database,
                             $this->username,
                             $this->password);
        $this->db = $db;
        return $this->db;
    }

    /**
     * Set up a database on PostgreSQL.
     * Will output status updates during the operation.
     * 
     * @param string $host
     * @param string $database
     * @param string $username
     * @param string $password
     * @return mixed array of database connection params on success, false on failure
     * 
     * @fixme escape things in the connection string in case we have a funny pass etc
     */
    function Pgsql_Db_installer($host, $database, $username, $password)
    {
        $connstring = "dbname=$database host=$host user=$username";

        //No password would mean trust authentication used.
        if (!empty($password)) {
            $connstring .= " password=$password";
        }
        $this->updateStatus("Starting installation...");
        $this->updateStatus("Checking database...");
        $conn = pg_connect($connstring);

        if ($conn ===false) {
            $this->updateStatus("Failed to connect to database: $connstring");
            return false;
        }

        //ensure database encoding is UTF8
        $record = pg_fetch_object(pg_query($conn, 'SHOW server_encoding'));
        if ($record->server_encoding != 'UTF8') {
            $this->updateStatus("StatusNet requires UTF8 character encoding. Your database is ". htmlentities($record->server_encoding));
            return false;
        }

        $this->updateStatus("Running database script...");
        //wrap in transaction;
        pg_query($conn, 'BEGIN');
        $res = $this->runDbScript('statusnet_pg.sql', $conn, 'pgsql');

        if ($res === false) {
            $this->updateStatus("Can't run database script.", true);
            return false;
        }
        foreach (array('sms_carrier' => 'SMS carrier',
                    'notice_source' => 'notice source',
                    'foreign_services' => 'foreign service')
              as $scr => $name) {
            $this->updateStatus(sprintf("Adding %s data to database...", $name));
            $res = $this->runDbScript($scr.'.sql', $conn, 'pgsql');
            if ($res === false) {
                $this->updateStatus(sprintf("Can't run %d script.", $name), true);
                return false;
            }
        }
        pg_query($conn, 'COMMIT');

        if (empty($password)) {
            $sqlUrl = "pgsql://$username@$host/$database";
        } else {
            $sqlUrl = "pgsql://$username:$password@$host/$database";
        }

        $db = array('type' => 'pgsql', 'database' => $sqlUrl);

        return $db;
    }

    /**
     * Set up a database on MySQL.
     * Will output status updates during the operation.
     * 
     * @param string $host
     * @param string $database
     * @param string $username
     * @param string $password
     * @return mixed array of database connection params on success, false on failure
     * 
     * @fixme escape things in the connection string in case we have a funny pass etc
     */
    function Mysql_Db_installer($host, $database, $username, $password)
    {
        $this->updateStatus("Starting installation...");
        $this->updateStatus("Checking database...");

        $conn = mysqli_init();
        if (!$conn->real_connect($host, $username, $password)) {
            $this->updateStatus("Can't connect to server '$host' as '$username'.", true);
            return false;
        }
        $this->updateStatus("Changing to database...");
        if (!$conn->select_db($database)) {
            $this->updateStatus("Can't change to database.", true);
            return false;
        }

        $this->updateStatus("Running database script...");
        $res = $this->runDbScript('statusnet.sql', $conn);
        if ($res === false) {
            $this->updateStatus("Can't run database script.", true);
            return false;
        }
        foreach (array('sms_carrier' => 'SMS carrier',
                    'notice_source' => 'notice source',
                    'foreign_services' => 'foreign service')
              as $scr => $name) {
            $this->updateStatus(sprintf("Adding %s data to database...", $name));
            $res = $this->runDbScript($scr.'.sql', $conn);
            if ($res === false) {
                $this->updateStatus(sprintf("Can't run %d script.", $name), true);
                return false;
            }
        }

        $sqlUrl = "mysqli://$username:$password@$host/$database";
        $db = array('type' => 'mysql', 'database' => $sqlUrl);
        return $db;
    }

    /**
     * Write a stock configuration file.
     *
     * @return boolean success
     * 
     * @fixme escape variables in output in case we have funny chars, apostrophes etc
     */
    function writeConf()
    {
        // assemble configuration file in a string
        $cfg =  "<?php\n".
                "if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }\n\n".

                // site name
                "\$config['site']['name'] = '{$this->sitename}';\n\n".

                // site location
                "\$config['site']['server'] = '{$this->server}';\n".
                "\$config['site']['path'] = '{$this->path}'; \n\n".

                // checks if fancy URLs are enabled
                ($this->fancy ? "\$config['site']['fancy'] = true;\n\n":'').

                // database
                "\$config['db']['database'] = '{$this->db['database']}';\n\n".
                ($this->db['type'] == 'pgsql' ? "\$config['db']['quote_identifiers'] = true;\n\n":'').
                "\$config['db']['type'] = '{$this->db['type']}';\n\n";
        // write configuration file out to install directory
        $res = file_put_contents(INSTALLDIR.'/config.php', $cfg);

        return $res;
    }

    /**
     * Install schema into the database
     *
     * @param string $filename location of database schema file
     * @param dbconn $conn     connection to database
     * @param string $type     type of database, currently mysql or pgsql
     *
     * @return boolean - indicating success or failure
     */
    function runDbScript($filename, $conn, $type = 'mysqli')
    {
        $sql = trim(file_get_contents(INSTALLDIR . '/db/' . $filename));
        $stmts = explode(';', $sql);
        foreach ($stmts as $stmt) {
            $stmt = trim($stmt);
            if (!mb_strlen($stmt)) {
                continue;
            }
            // FIXME: use PEAR::DB or PDO instead of our own switch
            switch ($type) {
            case 'mysqli':
                $res = $conn->query($stmt);
                if ($res === false) {
                    $error = $conn->error();
                }
                break;
            case 'pgsql':
                $res = pg_query($conn, $stmt);
                if ($res === false) {
                    $error = pg_last_error();
                }
                break;
            default:
                $this->updateStatus("runDbScript() error: unknown database type ". $type ." provided.");
            }
            if ($res === false) {
                $this->updateStatus("ERROR ($error) for SQL '$stmt'");
                return $res;
            }
        }
        return true;
    }

    /**
     * Create the initial admin user account.
     * Side effect: may load portions of StatusNet framework.
     * Side effect: outputs program info
     */
    function registerInitialUser()
    {
        define('STATUSNET', true);
        define('LACONICA', true); // compatibility

        require_once INSTALLDIR . '/lib/common.php';

        $data = array('nickname' => $this->adminNick,
                      'password' => $this->adminPass,
                      'fullname' => $this->adminNick);
        if ($this->adminEmail) {
            $data['email'] = $this->adminEmail;
        }
        $user = User::register($data);

        if (empty($user)) {
            return false;
        }

        // give initial user carte blanche

        $user->grantRole('owner');
        $user->grantRole('moderator');
        $user->grantRole('administrator');
        
        // Attempt to do a remote subscribe to update@status.net
        // Will fail if instance is on a private network.

        if ($this->adminUpdates && class_exists('Ostatus_profile')) {
            try {
                $oprofile = Ostatus_profile::ensureProfileURL('http://update.status.net/');
                Subscription::start($user->getProfile(), $oprofile->localProfile());
                $this->updateStatus("Set up subscription to <a href='http://update.status.net/'>update@status.net</a>.");
            } catch (Exception $e) {
                $this->updateStatus("Could not set up subscription to <a href='http://update.status.net/'>update@status.net</a>.", true);
            }
        }

        return true;
    }

    /**
     * The beef of the installer!
     * Create database, config file, and admin user.
     * 
     * Prerequisites: validation of input data.
     * 
     * @return boolean success
     */
    function doInstall()
    {
        $this->db = $this->setupDatabase();

        if (!$this->db) {
            // database connection failed, do not move on to create config file.
            return false;
        }

        if (!$this->skipConfig) {
            $this->updateStatus("Writing config file...");
            $res = $this->writeConf();

            if (!$res) {
                $this->updateStatus("Can't write config file.", true);
                return false;
            }
        }

        if (!empty($this->adminNick)) {
            // Okay, cross fingers and try to register an initial user
            if ($this->registerInitialUser()) {
                $this->updateStatus(
                    "An initial user with the administrator role has been created."
                );
            } else {
                $this->updateStatus(
                    "Could not create initial StatusNet user (administrator).",
                    true
                );
                return false;
            }
        }

        /*
            TODO https needs to be considered
        */
        $link = "http://".$this->server.'/'.$this->path;

        $this->updateStatus("StatusNet has been installed at $link");
        $this->updateStatus(
            "<strong>DONE!</strong> You can visit your <a href='$link'>new StatusNet site</a> (login as '$this->adminNick'). If this is your first StatusNet install, you may want to poke around our <a href='http://status.net/wiki/Getting_started'>Getting Started guide</a>."
        );

        return true;
    }

    /**
     * Output a pre-install-time warning message
     * @param string $message HTML ok, but should be plaintext-able
     * @param string $submessage HTML ok, but should be plaintext-able
     */
    abstract function warning($message, $submessage='');

    /**
     * Output an install-time progress message
     * @param string $message HTML ok, but should be plaintext-able
     * @param boolean $error true if this should be marked as an error condition
     */
    abstract function updateStatus($status, $error=false);

}