summaryrefslogtreecommitdiff
path: root/plugins/Blacklist/BlacklistPlugin.php
blob: 10f89ef72392b20bc602de9f5d0abc0ad4498a33 (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
<?php
/**
 * StatusNet, the distributed open-source microblogging tool
 *
 * Plugin to prevent use of nicknames or URLs on a blacklist
 *
 * PHP version 5
 *
 * LICENCE: 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  Action
 * @package   StatusNet
 * @author    Evan Prodromou <evan@status.net>
 * @copyright 2010 StatusNet Inc.
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link      http://status.net/
 */

if (!defined('STATUSNET')) {
    exit(1);
}

/**
 * Plugin to prevent use of nicknames or URLs on a blacklist
 *
 * @category Plugin
 * @package  StatusNet
 * @author   Evan Prodromou <evan@status.net>
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
 * @link     http://status.net/
 */
class BlacklistPlugin extends Plugin
{
    const VERSION = STATUSNET_VERSION;

    public $nicknames = array();
    public $urls      = array();
    public $canAdmin  = true;

    function _getNicknamePatterns()
    {
        $confNicknames = $this->_configArray('blacklist', 'nicknames');

        $dbNicknames = Nickname_blacklist::getPatterns();

        return array_merge($this->nicknames,
                           $confNicknames,
                           $dbNicknames);
    }

    function _getUrlPatterns()
    {
        $confURLs = $this->_configArray('blacklist', 'urls');

        $dbURLs = Homepage_blacklist::getPatterns();

        return array_merge($this->urls,
                           $confURLs,
                           $dbURLs);
    }

    /**
     * Database schema setup
     *
     * @return boolean hook value
     */
    function onCheckSchema()
    {
        $schema = Schema::get();

        // For storing blacklist patterns for nicknames
        $schema->ensureTable('nickname_blacklist',
                             array(new ColumnDef('pattern',
                                                 'varchar',
                                                 255,
                                                 false,
                                                 'PRI'),
                                   new ColumnDef('created',
                                                 'datetime',
                                                 null,
                                                 false)));

        $schema->ensureTable('homepage_blacklist',
                             array(new ColumnDef('pattern',
                                                 'varchar',
                                                 255,
                                                 false,
                                                 'PRI'),
                                   new ColumnDef('created',
                                                 'datetime',
                                                 null,
                                                 false)));

        return true;
    }

    /**
     * Retrieve an array from configuration
     *
     * Carefully checks a section.
     *
     * @param string $section Configuration section
     * @param string $setting Configuration setting
     *
     * @return array configuration values
     */
    function _configArray($section, $setting)
    {
        $config = common_config($section, $setting);

        if (empty($config)) {
            return array();
        } else if (is_array($config)) {
            return $config;
        } else if (is_string($config)) {
            return explode("\r\n", $config);
        } else {
            throw new Exception("Unknown data type for config $section + $setting");
        }
    }

    /**
     * Hook registration to prevent blacklisted homepages or nicknames
     *
     * Throws an exception if there's a blacklisted homepage or nickname.
     *
     * @param Action $action Action being called (usually register)
     *
     * @return boolean hook value
     */
    function onStartRegistrationTry($action)
    {
        $homepage = strtolower($action->trimmed('homepage'));

        if (!empty($homepage)) {
            if (!$this->_checkUrl($homepage)) {
                $msg = sprintf(_m("You may not register with homepage '%s'."),
                               $homepage);
                throw new ClientException($msg);
            }
        }

        $nickname = strtolower($action->trimmed('nickname'));

        if (!empty($nickname)) {
            if (!$this->_checkNickname($nickname)) {
                $msg = sprintf(_m("You may not register with nickname '%s'."),
                               $nickname);
                throw new ClientException($msg);
            }
        }

        return true;
    }

    /**
     * Hook profile update to prevent blacklisted homepages or nicknames
     *
     * Throws an exception if there's a blacklisted homepage or nickname.
     *
     * @param Action $action Action being called (usually register)
     *
     * @return boolean hook value
     */
    function onStartProfileSaveForm($action)
    {
        $homepage = strtolower($action->trimmed('homepage'));

        if (!empty($homepage)) {
            if (!$this->_checkUrl($homepage)) {
                $msg = sprintf(_m("You may not use homepage '%s'."),
                               $homepage);
                throw new ClientException($msg);
            }
        }

        $nickname = strtolower($action->trimmed('nickname'));

        if (!empty($nickname)) {
            if (!$this->_checkNickname($nickname)) {
                $msg = sprintf(_m("You may not use nickname '%s'."),
                               $nickname);
                throw new ClientException($msg);
            }
        }

        return true;
    }

    /**
     * Hook notice save to prevent blacklisted urls
     *
     * Throws an exception if there's a blacklisted url in the content.
     *
     * @param Notice &$notice Notice being saved
     *
     * @return boolean hook value
     */
    function onStartNoticeSave(&$notice)
    {
        common_replace_urls_callback($notice->content,
                                     array($this, 'checkNoticeUrl'));
        return true;
    }

    /**
     * Helper callback for notice save
     *
     * Throws an exception if there's a blacklisted url in the content.
     *
     * @param string $url URL in the notice content
     *
     * @return boolean hook value
     */
    function checkNoticeUrl($url)
    {
        // It comes in special'd, so we unspecial it
        // before comparing against patterns

        $url = htmlspecialchars_decode($url);

        if (!$this->_checkUrl($url)) {
            $msg = sprintf(_m("You may not use URL \"%s\" in notices."),
                           $url);
            throw new ClientException($msg);
        }

        return $url;
    }

    /**
     * Helper for checking URLs
     *
     * Checks an URL against our patterns for a match.
     *
     * @param string $url URL to check
     *
     * @return boolean true means it's OK, false means it's bad
     */
    private function _checkUrl($url)
    {
        $patterns = $this->_getUrlPatterns();

        foreach ($patterns as $pattern) {
            if ($pattern != '' && preg_match("/$pattern/", $url)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Helper for checking nicknames
     *
     * Checks a nickname against our patterns for a match.
     *
     * @param string $nickname nickname to check
     *
     * @return boolean true means it's OK, false means it's bad
     */
    private function _checkNickname($nickname)
    {
        $patterns = $this->_getNicknamePatterns();

        foreach ($patterns as $pattern) {
            if ($pattern != '' && preg_match("/$pattern/", $nickname)) {
                return false;
            }
        }

        return true;
    }

    /**
     * Add our actions to the URL router
     *
     * @param Net_URL_Mapper $m URL mapper for this hit
     *
     * @return boolean hook return
     */
    function onRouterInitialized($m)
    {
        $m->connect('admin/blacklist', array('action' => 'blacklistadminpanel'));
        return true;
    }

    /**
     * Auto-load our classes if called
     *
     * @param string $cls Class to load
     *
     * @return boolean hook return
     */
    function onAutoload($cls)
    {
        switch (strtolower($cls))
        {
        case 'nickname_blacklist':
        case 'homepage_blacklist':
            include_once INSTALLDIR.'/plugins/Blacklist/'.ucfirst($cls).'.php';
            return false;
        case 'blacklistadminpanelaction':
            $base = strtolower(mb_substr($cls, 0, -6));
            include_once INSTALLDIR.'/plugins/Blacklist/'.$base.'.php';
            return false;
        default:
            return true;
        }
    }

    /**
     * Plugin version data
     *
     * @param array &$versions array of version blocks
     *
     * @return boolean hook value
     */
    function onPluginVersion(&$versions)
    {
        $versions[] = array('name' => 'Blacklist',
                            'version' => self::VERSION,
                            'author' => 'Evan Prodromou',
                            'homepage' =>
                            'http://status.net/wiki/Plugin:Blacklist',
                            'description' =>
                            _m('Keeps a blacklist of forbidden nickname '.
                               'and URL patterns.'));
        return true;
    }

    /**
     * Determines if our admin panel can be shown
     *
     * @param string  $name  name of the admin panel
     * @param boolean &$isOK result
     *
     * @return boolean hook value
     */
    function onAdminPanelCheck($name, &$isOK)
    {
        if ($name == 'blacklist') {
            $isOK = $this->canAdmin;
            return false;
        }

        return true;
    }

    /**
     * Add our tab to the admin panel
     *
     * @param Widget $nav Admin panel nav
     *
     * @return boolean hook value
     */
    function onEndAdminPanelNav($nav)
    {
        if (AdminPanelAction::canAdmin('blacklist')) {

            $action_name = $nav->action->trimmed('action');

            $nav->out->menuItem(common_local_url('blacklistadminpanel'),
                                _m('Blacklist'),
                                _m('Blacklist configuration'),
                                $action_name == 'blacklistadminpanel',
                                'nav_blacklist_admin_panel');
        }

        return true;
    }

    function onEndDeleteUserForm($action, $user)
    {
        $cur = common_current_user();

        if (empty($cur) || !$cur->hasRight(Right::CONFIGURESITE)) {
            return;
        }

        $profile = $user->getProfile();

        if (empty($profile)) {
            return;
        }

        $action->elementStart('ul', 'form_data');
        $action->elementStart('li');
        $this->checkboxAndText($action,
                               'blacklistnickname',
                               _m('Add this nickname pattern to blacklist'),
                               'blacklistnicknamepattern',
                               $this->patternizeNickname($user->nickname));
        $action->elementEnd('li');

        if (!empty($profile->homepage)) {
            $action->elementStart('li');
            $this->checkboxAndText($action,
                                   'blacklisthomepage',
                                   _m('Add this homepage pattern to blacklist'),
                                   'blacklisthomepagepattern',
                                   $this->patternizeHomepage($profile->homepage));
            $action->elementEnd('li');
        }

        $action->elementEnd('ul');
    }

    function onEndDeleteUser($action, $user)
    {
        if ($action->boolean('blacklisthomepage')) {
            $pattern = $action->trimmed('blacklisthomepagepattern');
            Homepage_blacklist::ensurePattern($pattern);
        }

        if ($action->boolean('blacklistnickname')) {
            $pattern = $action->trimmed('blacklistnicknamepattern');
            Nickname_blacklist::ensurePattern($pattern);
        }

        return true;
    }

    function checkboxAndText($action, $checkID, $label, $textID, $value)
    {
        $action->element('input', array('name' => $checkID,
                                        'type' => 'checkbox',
                                        'class' => 'checkbox',
                                        'id' => $checkID));

        $action->text(' ');

        $action->element('label', array('class' => 'checkbox',
                                        'for' => $checkID),
                         $label);

        $action->text(' ');

        $action->element('input', array('name' => $textID,
                                        'type' => 'text',
                                        'id' => $textID,
                                        'value' => $value));
    }

    function patternizeNickname($nickname)
    {
        return $nickname;
    }

    function patternizeHomepage($homepage)
    {
        $hostname = parse_url($homepage, PHP_URL_HOST);
        return $hostname;
    }
}