We are no longer offering accounts on this server. Consider https://gitlab.freedesktop.org/ as a place to host projects.

twitterauthorization.php 20.2 KB
Newer Older
1 2
<?php
/**
3
 * StatusNet, the distributed open-source microblogging tool
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
 *
 * Class for doing OAuth authentication against Twitter
 *
 * 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/>.
 *
Zach Copley's avatar
Zach Copley committed
22
 * @category  Plugin
23
 * @package   StatusNet
Julien C's avatar
Julien C committed
24
 * @author    Zach Copley <zach@status.net>
Zach Copley's avatar
Zach Copley committed
25 26
 * @author    Julien C <chaumond@gmail.com>
 * @copyright 2009-2010 StatusNet, Inc.
27
 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
28
 * @link      http://status.net/
29 30
 */

31
if (!defined('STATUSNET') && !defined('LACONICA')) {
32 33 34
    exit(1);
}

35 36
require_once INSTALLDIR . '/plugins/TwitterBridge/twitter.php';

37 38 39
/**
 * Class for doing OAuth authentication against Twitter
 *
40
 * Peforms the OAuth "dance" between StatusNet and Twitter -- requests a token,
41
 * authorizes it, and exchanges it for an access token.  It also creates a link
42
 * (Foreign_link) between the StatusNet user and Twitter user and stores the
43 44
 * access token and secret in the link.
 *
Zach Copley's avatar
Zach Copley committed
45
 * @category Plugin
46 47
 * @package  StatusNet
 * @author   Zach Copley <zach@status.net>
Zach Copley's avatar
Zach Copley committed
48
 * @author   Julien C <chaumond@gmail.com>
49
 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
50
 * @link     http://status.net/
51 52
 *
 */
53 54
class TwitterauthorizationAction extends Action
{
55 56
    var $twuid        = null;
    var $tw_fields    = null;
Julien C's avatar
Julien C committed
57
    var $access_token = null;
58
    var $signin       = null;
59
    var $verifier     = null;
60

61 62 63 64 65 66 67
    /**
     * Initialize class members. Looks for 'oauth_token' parameter.
     *
     * @param array $args misc. arguments
     *
     * @return boolean true
     */
68 69 70 71
    function prepare($args)
    {
        parent::prepare($args);

72
        $this->signin      = $this->boolean('signin');
73
        $this->oauth_token = $this->arg('oauth_token');
74
        $this->verifier    = $this->arg('oauth_verifier');
75 76 77 78

        return true;
    }

79 80 81 82 83 84 85
    /**
     * Handler method
     *
     * @param array $args is ignored since it's now passed in in prepare()
     *
     * @return nothing
     */
86 87 88
    function handle($args)
    {
        parent::handle($args);
89

Julien C's avatar
Julien C committed
90 91 92
        if (common_logged_in()) {
            $user  = common_current_user();
            $flink = Foreign_link::getByUserID($user->id, TWITTER_SERVICE);
93

94 95 96
            // If there's already a foreign link record and a foreign user
            // it means the accounts are already linked, and this is unecessary.
            // So go back.
97

Julien C's avatar
Julien C committed
98
            if (isset($flink)) {
99 100 101 102
                $fuser = $flink->getForeignUser();
                if (!empty($fuser)) {
                    common_redirect(common_local_url('twittersettings'));
                }
Julien C's avatar
Julien C committed
103
            }
104
        }
105

Julien C's avatar
Julien C committed
106
        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
107

Julien C's avatar
Julien C committed
108
            // User was not logged in to StatusNet before
109

Julien C's avatar
Julien C committed
110
            $this->twuid = $this->trimmed('twuid');
111

Zach Copley's avatar
Zach Copley committed
112
            $this->tw_fields = array('screen_name' => $this->trimmed('tw_fields_screen_name'),
113 114
                                     'fullname' => $this->trimmed('tw_fields_fullname'));

Julien C's avatar
Julien C committed
115 116 117
            $this->access_token = new OAuthToken($this->trimmed('access_token_key'), $this->trimmed('access_token_secret'));

            $token = $this->trimmed('token');
118

Julien C's avatar
Julien C committed
119
            if (!$token || $token != common_session_token()) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
120
                $this->showForm(_m('There was a problem with your session token. Try again, please.'));
Julien C's avatar
Julien C committed
121 122
                return;
            }
123

Julien C's avatar
Julien C committed
124 125
            if ($this->arg('create')) {
                if (!$this->boolean('license')) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
126
                    $this->showForm(_m('You can\'t register if you don\'t agree to the license.'),
Julien C's avatar
Julien C committed
127 128 129 130 131 132 133
                                    $this->trimmed('newname'));
                    return;
                }
                $this->createNewUser();
            } else if ($this->arg('connect')) {
                $this->connectNewUser();
            } else {
134
                common_debug('Twitter bridge - ' . print_r($this->args, true));
Siebrand Mazeland's avatar
Siebrand Mazeland committed
135
                $this->showForm(_m('Something weird happened.'),
Julien C's avatar
Julien C committed
136 137
                                $this->trimmed('newname'));
            }
138
        } else {
Julien C's avatar
Julien C committed
139 140 141
            // $this->oauth_token is only populated once Twitter authorizes our
            // request token. If it's empty we're at the beginning of the auth
            // process
142

Julien C's avatar
Julien C committed
143 144 145 146 147
            if (empty($this->oauth_token)) {
                $this->authorizeRequestToken();
            } else {
                $this->saveAccessToken();
            }
148 149
        }
    }
150

151 152 153 154 155 156 157 158 159
    /**
     * Asks Twitter for a request token, and then redirects to Twitter
     * to authorize it.
     *
     * @return nothing
     */
    function authorizeRequestToken()
    {
        try {
160

161
            // Get a new request token and authorize it
162

163
            $client  = new TwitterOAuthClient();
164
            $req_tok = $client->getRequestToken();
165

166
            // Sock the request token away in the session temporarily
167

168
            $_SESSION['twitter_request_token']        = $req_tok->key;
169
            $_SESSION['twitter_request_token_secret'] = $req_tok->secret;
170

171
            $auth_link = $client->getAuthorizeLink($req_tok, $this->signin);
172

173
        } catch (OAuthClientException $e) {
174 175 176 177 178 179 180
            $msg = sprintf(
                'OAuth client error - code: %1s, msg: %2s',
                $e->getCode(),
                $e->getMessage()
            );
            common_log(LOG_INFO, 'Twitter bridge - ' . $msg);
            $this->serverError(
181
                _m('Couldn\'t link your Twitter account.')
182
            );
183
        }
184

185 186
        common_redirect($auth_link);
    }
187

188 189 190 191 192 193 194 195 196 197
    /**
     * Called when Twitter returns an authorized request token. Exchanges
     * it for an access token and stores it.
     *
     * @return nothing
     */
    function saveAccessToken()
    {
        // Check to make sure Twitter returned the same request
        // token we sent them
198

199
        if ($_SESSION['twitter_request_token'] != $this->oauth_token) {
200 201 202
            $this->serverError(
                _m('Couldn\'t link your Twitter account: oauth_token mismatch.')
            );
203
        }
204

205 206
        $twitter_user = null;

207
        try {
208

209 210
            $client = new TwitterOAuthClient($_SESSION['twitter_request_token'],
                $_SESSION['twitter_request_token_secret']);
211

212
            // Exchange the request token for an access token
213

214
            $atok = $client->getAccessToken($this->verifier);
215

216
            // Test the access token and get the user's Twitter info
217

218
            $client       = new TwitterOAuthClient($atok->key, $atok->secret);
219
            $twitter_user = $client->verifyCredentials();
220

221
        } catch (OAuthClientException $e) {
222 223 224 225 226 227 228
            $msg = sprintf(
                'OAuth client error - code: %1$s, msg: %2$s',
                $e->getCode(),
                $e->getMessage()
            );
            common_log(LOG_INFO, 'Twitter bridge - ' . $msg);
            $this->serverError(
229
                _m('Couldn\'t link your Twitter account.')
230
            );
231
        }
232

Julien C's avatar
Julien C committed
233 234
        if (common_logged_in()) {
            // Save the access token and Twitter user info
235

Zach Copley's avatar
Zach Copley committed
236 237
            $user = common_current_user();
            $this->saveForeignLink($user->id, $twitter_user->id, $atok);
238
            save_twitter_user($twitter_user->id, $twitter_user->screen_name);
239 240 241

        } else {

Julien C's avatar
Julien C committed
242
            $this->twuid = $twitter_user->id;
Zach Copley's avatar
Zach Copley committed
243
            $this->tw_fields = array("screen_name" => $twitter_user->screen_name,
244
                                     "fullname" => $twitter_user->name);
Julien C's avatar
Julien C committed
245 246 247
            $this->access_token = $atok;
            $this->tryLogin();
        }
248

249
        // Clean up the the mess we made in the session
250

251 252
        unset($_SESSION['twitter_request_token']);
        unset($_SESSION['twitter_request_token_secret']);
253

Julien C's avatar
Julien C committed
254 255 256
        if (common_logged_in()) {
            common_redirect(common_local_url('twittersettings'));
        }
257
    }
258

259 260 261 262
    /**
     * Saves a Foreign_link between Twitter user and local user,
     * which includes the access token and secret.
     *
Zach Copley's avatar
Zach Copley committed
263 264 265
     * @param int        $user_id StatusNet user ID
     * @param int        $twuid   Twitter user ID
     * @param OAuthToken $token   the access token to save
266 267 268
     *
     * @return nothing
     */
Zach Copley's avatar
Zach Copley committed
269
    function saveForeignLink($user_id, $twuid, $access_token)
270 271 272
    {
        $flink = new Foreign_link();

273 274
        $flink->user_id = $user_id;
        $flink->service = TWITTER_SERVICE;
275 276 277 278 279

        // delete stale flink, if any
        $result = $flink->find(true);

        if (!empty($result)) {
280
            $flink->safeDelete();
281
        }
282

283 284 285 286
        $flink->user_id     = $user_id;
        $flink->foreign_id  = $twuid;
        $flink->service     = TWITTER_SERVICE;

Zach Copley's avatar
Zach Copley committed
287
        $creds = TwitterOAuthClient::packToken($access_token);
Julien C's avatar
Julien C committed
288

289 290
        $flink->credentials = $creds;
        $flink->created     = common_sql_now();
Julien C's avatar
Julien C committed
291

292 293 294 295 296 297 298 299
        // Defaults: noticesync on, everything else off

        $flink->set_flags(true, false, false, false);

        $flink_id = $flink->insert();

        if (empty($flink_id)) {
            common_log_db_error($flink, 'INSERT', __FILE__);
Siebrand Mazeland's avatar
Siebrand Mazeland committed
300
            $this->serverError(_m('Couldn\'t link your Twitter account.'));
301 302 303 304
        }

        return $flink_id;
    }
Julien C's avatar
Julien C committed
305 306 307 308 309 310 311

    function showPageNotice()
    {
        if ($this->error) {
            $this->element('div', array('class' => 'error'), $this->error);
        } else {
            $this->element('div', 'instructions',
Siebrand Mazeland's avatar
Siebrand Mazeland committed
312
                           sprintf(_m('This is the first time you\'ve logged into %s so we must connect your Twitter account to a local account. You can either create a new account, or connect with your existing account, if you have one.'), common_config('site', 'name')));
Julien C's avatar
Julien C committed
313 314 315 316 317
        }
    }

    function title()
    {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
318
        return _m('Twitter Account Setup');
Julien C's avatar
Julien C committed
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333
    }

    function showForm($error=null, $username=null)
    {
        $this->error = $error;
        $this->username = $username;

        $this->showPage();
    }

    function showPage()
    {
        parent::showPage();
    }

334 335 336 337 338
    /**
     * @fixme much of this duplicates core code, which is very fragile.
     * Should probably be replaced with an extensible mini version of
     * the core registration form.
     */
Julien C's avatar
Julien C committed
339 340 341 342 343 344 345 346 347 348 349 350
    function showContent()
    {
        if (!empty($this->message_text)) {
            $this->element('p', null, $this->message);
            return;
        }

        $this->elementStart('form', array('method' => 'post',
                                          'id' => 'form_settings_twitter_connect',
                                          'class' => 'form_settings',
                                          'action' => common_local_url('twitterauthorization')));
        $this->elementStart('fieldset', array('id' => 'settings_twitter_connect_options'));
Siebrand Mazeland's avatar
Siebrand Mazeland committed
351
        $this->element('legend', null, _m('Connection options'));
Julien C's avatar
Julien C committed
352 353 354 355 356 357 358 359
        $this->elementStart('ul', 'form_data');
        $this->elementStart('li');
        $this->element('input', array('type' => 'checkbox',
                                      'id' => 'license',
                                      'class' => 'checkbox',
                                      'name' => 'license',
                                      'value' => 'true'));
        $this->elementStart('label', array('class' => 'checkbox', 'for' => 'license'));
Siebrand Mazeland's avatar
Siebrand Mazeland committed
360
        $message = _m('My text and files are available under %s ' .
361 362 363 364 365 366 367 368
                     'except this private data: password, ' .
                     'email address, IM address, and phone number.');
        $link = '<a href="' .
                htmlspecialchars(common_config('license', 'url')) .
                '">' .
                htmlspecialchars(common_config('license', 'title')) .
                '</a>';
        $this->raw(sprintf(htmlspecialchars($message), $link));
Julien C's avatar
Julien C committed
369 370 371 372 373 374
        $this->elementEnd('label');
        $this->elementEnd('li');
        $this->elementEnd('ul');
        $this->hidden('access_token_key', $this->access_token->key);
        $this->hidden('access_token_secret', $this->access_token->secret);
        $this->hidden('twuid', $this->twuid);
Zach Copley's avatar
Zach Copley committed
375
        $this->hidden('tw_fields_screen_name', $this->tw_fields['screen_name']);
376
        $this->hidden('tw_fields_name', $this->tw_fields['fullname']);
Julien C's avatar
Julien C committed
377 378 379 380

        $this->elementStart('fieldset');
        $this->hidden('token', common_session_token());
        $this->element('legend', null,
Siebrand Mazeland's avatar
Siebrand Mazeland committed
381
                       _m('Create new account'));
Julien C's avatar
Julien C committed
382
        $this->element('p', null,
Siebrand Mazeland's avatar
Siebrand Mazeland committed
383
                       _m('Create a new user with this nickname.'));
Julien C's avatar
Julien C committed
384 385
        $this->elementStart('ul', 'form_data');
        $this->elementStart('li');
Siebrand Mazeland's avatar
Siebrand Mazeland committed
386
        $this->input('newname', _m('New nickname'),
Julien C's avatar
Julien C committed
387
                     ($this->username) ? $this->username : '',
Siebrand Mazeland's avatar
Siebrand Mazeland committed
388
                     _m('1-64 lowercase letters or numbers, no punctuation or spaces'));
Julien C's avatar
Julien C committed
389 390
        $this->elementEnd('li');
        $this->elementEnd('ul');
Siebrand Mazeland's avatar
Siebrand Mazeland committed
391
        $this->submit('create', _m('Create'));
Julien C's avatar
Julien C committed
392 393 394 395
        $this->elementEnd('fieldset');

        $this->elementStart('fieldset');
        $this->element('legend', null,
Siebrand Mazeland's avatar
Siebrand Mazeland committed
396
                       _m('Connect existing account'));
Julien C's avatar
Julien C committed
397
        $this->element('p', null,
Siebrand Mazeland's avatar
Siebrand Mazeland committed
398
                       _m('If you already have an account, login with your username and password to connect it to your Twitter account.'));
Julien C's avatar
Julien C committed
399 400
        $this->elementStart('ul', 'form_data');
        $this->elementStart('li');
Siebrand Mazeland's avatar
Siebrand Mazeland committed
401
        $this->input('nickname', _m('Existing nickname'));
Julien C's avatar
Julien C committed
402 403
        $this->elementEnd('li');
        $this->elementStart('li');
Siebrand Mazeland's avatar
Siebrand Mazeland committed
404
        $this->password('password', _m('Password'));
Julien C's avatar
Julien C committed
405 406
        $this->elementEnd('li');
        $this->elementEnd('ul');
Siebrand Mazeland's avatar
Siebrand Mazeland committed
407
        $this->submit('connect', _m('Connect'));
Julien C's avatar
Julien C committed
408 409 410 411 412 413 414 415 416 417 418 419 420 421
        $this->elementEnd('fieldset');

        $this->elementEnd('fieldset');
        $this->elementEnd('form');
    }

    function message($msg)
    {
        $this->message_text = $msg;
        $this->showPage();
    }

    function createNewUser()
    {
422 423 424 425
        if (!Event::handle('StartRegistrationTry', array($this))) {
            return;
        }

Julien C's avatar
Julien C committed
426
        if (common_config('site', 'closed')) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
427
            $this->clientError(_m('Registration not allowed.'));
Julien C's avatar
Julien C committed
428 429 430 431 432 433 434 435
            return;
        }

        $invite = null;

        if (common_config('site', 'inviteonly')) {
            $code = $_SESSION['invitecode'];
            if (empty($code)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
436
                $this->clientError(_m('Registration not allowed.'));
Julien C's avatar
Julien C committed
437 438 439 440 441 442
                return;
            }

            $invite = Invitation::staticGet($code);

            if (empty($invite)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
443
                $this->clientError(_m('Not a valid invitation code.'));
Julien C's avatar
Julien C committed
444 445 446 447
                return;
            }
        }

448 449 450 451
        try {
            $nickname = Nickname::normalize($this->trimmed('newname'));
        } catch (NicknameException $e) {
            $this->showForm($e->getMessage());
Julien C's avatar
Julien C committed
452 453 454 455
            return;
        }

        if (!User::allowed_nickname($nickname)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
456
            $this->showForm(_m('Nickname not allowed.'));
Julien C's avatar
Julien C committed
457 458 459 460
            return;
        }

        if (User::staticGet('nickname', $nickname)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
461
            $this->showForm(_m('Nickname already in use. Try another one.'));
Julien C's avatar
Julien C committed
462 463 464
            return;
        }

465
        $fullname = trim($this->tw_fields['fullname']);
Julien C's avatar
Julien C committed
466 467 468 469 470 471 472 473 474

        $args = array('nickname' => $nickname, 'fullname' => $fullname);

        if (!empty($invite)) {
            $args['code'] = $invite->code;
        }

        $user = User::register($args);

475
        if (empty($user)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
476
            $this->serverError(_m('Error registering user.'));
477 478 479
            return;
        }

Zach Copley's avatar
Zach Copley committed
480 481 482 483 484
        $result = $this->saveForeignLink($user->id,
                                         $this->twuid,
                                         $this->access_token);

        save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
Julien C's avatar
Julien C committed
485 486

        if (!$result) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
487
            $this->serverError(_m('Error connecting user to Twitter.'));
Julien C's avatar
Julien C committed
488 489 490 491 492 493
            return;
        }

        common_set_user($user);
        common_real_login(true);

494
        common_debug('TwitterBridge Plugin - ' .
Zach Copley's avatar
Zach Copley committed
495
                     "Registered new user $user->id from Twitter user $this->twuid");
Julien C's avatar
Julien C committed
496

497 498
        Event::handle('EndRegistrationTry', array($this));

Julien C's avatar
Julien C committed
499 500 501 502 503 504 505 506 507 508
        common_redirect(common_local_url('showstream', array('nickname' => $user->nickname)),
                        303);
    }

    function connectNewUser()
    {
        $nickname = $this->trimmed('nickname');
        $password = $this->trimmed('password');

        if (!common_check_user($nickname, $password)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
509
            $this->showForm(_m('Invalid username or password.'));
Julien C's avatar
Julien C committed
510 511 512 513 514 515
            return;
        }

        $user = User::staticGet('nickname', $nickname);

        if (!empty($user)) {
516
            common_debug('TwitterBridge Plugin - ' .
Julien C's avatar
Julien C committed
517 518 519
                         "Legit user to connect to Twitter: $nickname");
        }

Zach Copley's avatar
Zach Copley committed
520 521 522 523 524
        $result = $this->saveForeignLink($user->id,
                                         $this->twuid,
                                         $this->access_token);

        save_twitter_user($this->twuid, $this->tw_fields['screen_name']);
Julien C's avatar
Julien C committed
525 526

        if (!$result) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
527
            $this->serverError(_m('Error connecting user to Twitter.'));
Julien C's avatar
Julien C committed
528 529 530
            return;
        }

531
        common_debug('TwitterBridge Plugin - ' .
Zach Copley's avatar
Zach Copley committed
532
                     "Connected Twitter user $this->twuid to local user $user->id");
Julien C's avatar
Julien C committed
533 534 535 536 537 538 539 540 541 542 543 544 545 546

        common_set_user($user);
        common_real_login(true);

        $this->goHome($user->nickname);
    }

    function connectUser()
    {
        $user = common_current_user();

        $result = $this->flinkUser($user->id, $this->twuid);

        if (empty($result)) {
Siebrand Mazeland's avatar
Siebrand Mazeland committed
547
            $this->serverError(_m('Error connecting user to Twitter.'));
Julien C's avatar
Julien C committed
548 549 550
            return;
        }

551
        common_debug('TwitterBridge Plugin - ' .
Zach Copley's avatar
Zach Copley committed
552
                     "Connected Twitter user $this->twuid to local user $user->id");
Julien C's avatar
Julien C committed
553 554 555 556

        // Return to Twitter connection settings tab
        common_redirect(common_local_url('twittersettings'), 303);
    }
557

Julien C's avatar
Julien C committed
558 559
    function tryLogin()
    {
560 561
        common_debug('TwitterBridge Plugin - ' .
                     "Trying login for Twitter user $this->twuid.");
Julien C's avatar
Julien C committed
562

Zach Copley's avatar
Zach Copley committed
563 564
        $flink = Foreign_link::getByForeignID($this->twuid,
                                              TWITTER_SERVICE);
Julien C's avatar
Julien C committed
565 566 567 568 569 570

        if (!empty($flink)) {
            $user = $flink->getUser();

            if (!empty($user)) {

571
                common_debug('TwitterBridge Plugin - ' .
Julien C's avatar
Julien C committed
572 573 574 575 576 577 578 579 580
                             "Logged in Twitter user $flink->foreign_id as user $user->id ($user->nickname)");

                common_set_user($user);
                common_real_login(true);
                $this->goHome($user->nickname);
            }

        } else {

581
            common_debug('TwitterBridge Plugin - ' .
Julien C's avatar
Julien C committed
582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604
                         "No flink found for twuid: $this->twuid - new user");

            $this->showForm(null, $this->bestNewNickname());
        }
    }

    function goHome($nickname)
    {
        $url = common_get_returnto();
        if ($url) {
            // We don't have to return to it again
            common_set_returnto(null);
        } else {
            $url = common_local_url('all',
                                    array('nickname' =>
                                          $nickname));
        }

        common_redirect($url, 303);
    }

    function bestNewNickname()
    {
605 606
        if (!empty($this->tw_fields['fullname'])) {
            $nickname = $this->nicknamize($this->tw_fields['fullname']);
Julien C's avatar
Julien C committed
607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
            if ($this->isNewNickname($nickname)) {
                return $nickname;
            }
        }

        return null;
    }

     // Given a string, try to make it work as a nickname

     function nicknamize($str)
     {
         $str = preg_replace('/\W/', '', $str);
         $str = str_replace(array('-', '_'), '', $str);
         return strtolower($str);
     }

    function isNewNickname($str)
    {
626
        if (!Nickname::isValid($str)) {
Julien C's avatar
Julien C committed
627 628 629 630 631 632 633 634 635 636 637
            return false;
        }
        if (!User::allowed_nickname($str)) {
            return false;
        }
        if (User::staticGet('nickname', $str)) {
            return false;
        }
        return true;
    }

638 639
}