summaryrefslogtreecommitdiff
path: root/lib/twitter.php
blob: 8f73c5a578d0f2820f0ccfff39f15dc3c0959ab0 (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
<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Control Yourself, 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/>.
 */

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

define('TWITTER_SERVICE', 1); // Twitter is foreign_service ID 1

function get_twitter_data($uri, $screen_name, $password)
{

    $options = array(
            CURLOPT_USERPWD => sprintf("%s:%s", $screen_name, $password),
            CURLOPT_RETURNTRANSFER    => true,
            CURLOPT_FAILONERROR        => true,
            CURLOPT_HEADER            => false,
            CURLOPT_FOLLOWLOCATION    => true,
            CURLOPT_USERAGENT      => "Laconica",
            CURLOPT_CONNECTTIMEOUT    => 120,
            CURLOPT_TIMEOUT            => 120,
            # Twitter is strict about accepting invalid "Expect" headers
            CURLOPT_HTTPHEADER => array('Expect:')
    );

    $ch = curl_init($uri);
    curl_setopt_array($ch, $options);
    $data = curl_exec($ch);
    $errmsg = curl_error($ch);

    if ($errmsg) {
        common_debug("Twitter bridge - cURL error: $errmsg - trying to load: $uri with user $screen_name.",
            __FILE__);

        if (defined('SCRIPT_DEBUG')) {
            print "cURL error: $errmsg - trying to load: $uri with user $screen_name.\n";
        }
    }

    curl_close($ch);

    return $data;
}

function twitter_json_data($uri, $screen_name, $password)
{
    $json_data = get_twitter_data($uri, $screen_name, $password);

    if (!$json_data) {
        return false;
    }

    $data = json_decode($json_data);

    if (!$data) {
        return false;
    }

    return $data;
}

function twitter_user_info($screen_name, $password)
{
    $uri = "http://twitter.com/users/show/$screen_name.json";
    return twitter_json_data($uri, $screen_name, $password);
}

function twitter_friends_ids($screen_name, $password)
{
    $uri = "http://twitter.com/friends/ids/$screen_name.json";
    return twitter_json_data($uri, $screen_name, $password);
}

function update_twitter_user($twitter_id, $screen_name)
{
    $uri = 'http://twitter.com/' . $screen_name;

    $fuser = new Foreign_user();

    $fuser->query('BEGIN');

    // Dropping down to SQL because regular db_object udpate stuff doesn't seem
    // to work so good with tables that have multiple column primary keys

    // Any time we update the uri for a forein user we have to make sure there
    // are no dupe entries first -- unique constraint on the uri column

    $qry = 'UPDATE foreign_user set uri = \'\' WHERE uri = ';
    $qry .= '\'' . $uri . '\'' . ' AND service = ' . TWITTER_SERVICE;

    $result = $fuser->query($qry);

    if ($result) {
        common_debug("Removed uri ($uri) from another foreign_user who was squatting on it.");
        if (defined('SCRIPT_DEBUG')) {
            print("Removed uri ($uri) from another Twitter user who was squatting on it.\n");
        }
    }

    // Update the user
    $qry = 'UPDATE foreign_user SET nickname = ';
    $qry .= '\'' . $screen_name . '\'' . ', uri = \'' . $uri . '\' ';
    $qry .= 'WHERE id = ' . $twitter_id . ' AND service = ' . TWITTER_SERVICE;

    $result = $fuser->query($qry);

    if (!$result) {
        common_log(LOG_WARNING,
            "Couldn't update foreign_user data for Twitter user: $screen_name");
        common_log_db_error($fuser, 'UPDATE', __FILE__);
        if (defined('SCRIPT_DEBUG')) {
            print "UPDATE failed: for Twitter user:  $twitter_id - $screen_name. - ";
            print common_log_objstring($fuser) . "\n";
            $error = &PEAR::getStaticProperty('DB_DataObject','lastError');
            print "DB_DataObject Error: " . $error->getMessage() . "\n";
        }
        return false;
    }

    $fuser->query('COMMIT');

    $fuser->free();
    unset($fuser);

    return true;
}

function add_twitter_user($twitter_id, $screen_name)
{

    $new_uri = 'http://twitter.com/' . $screen_name;

    // Clear out any bad old foreign_users with the new user's legit URL
    // This can happen when users move around or fakester accounts get
    // repoed, and things like that.
    $luser = new Foreign_user();
    $luser->uri = $new_uri;
    $luser->service = TWITTER_SERVICE;
    $result = $luser->delete();

    if ($result) {
        common_log(LOG_WARNING,
            "Twitter bridge - removed invalid Twitter user squatting on uri: $new_uri");
        if (defined('SCRIPT_DEBUG')) {
            print "Removed invalid Twitter user squatting on uri: $new_uri\n";
        }
    }

    $luser->free();
    unset($luser);

    // Otherwise, create a new Twitter user
    $fuser = new Foreign_user();

    $fuser->nickname = $screen_name;
    $fuser->uri = 'http://twitter.com/' . $screen_name;
    $fuser->id = $twitter_id;
    $fuser->service = TWITTER_SERVICE;
    $fuser->created = common_sql_now();
    $result = $fuser->insert();

    if (!$result) {
        common_log(LOG_WARNING,
            "Twitter bridge - failed to add new Twitter user: $twitter_id - $screen_name.");
        common_log_db_error($fuser, 'INSERT', __FILE__);
        if (defined('SCRIPT_DEBUG')) {
            print "INSERT failed: could not add new Twitter user: $twitter_id - $screen_name. - ";
            print common_log_objstring($fuser) . "\n";
            $error = &PEAR::getStaticProperty('DB_DataObject','lastError');
            print "DB_DataObject Error: " . $error->getMessage() . "\n";
        }
    } else {
        common_debug("Twitter bridge - Added new Twitter user: $screen_name ($twitter_id).");
        if (defined('SCRIPT_DEBUG')) {
            print "Added new Twitter user: $screen_name ($twitter_id).\n";
        }
    }

    return $result;
}

// Creates or Updates a Twitter user
function save_twitter_user($twitter_id, $screen_name)
{

    // Check to see whether the Twitter user is already in the system,
    // and update its screen name and uri if so.
    $fuser = Foreign_user::getForeignUser($twitter_id, TWITTER_SERVICE);

    if ($fuser) {

        $result = true;

        // Only update if Twitter screen name has changed
        if ($fuser->nickname != $screen_name) {
            $result = update_twitter_user($twitter_id, $screen_name);

            common_debug('Twitter bridge - Updated nickname (and URI) for Twitter user ' .
                "$fuser->id to $screen_name, was $fuser->nickname");

            if (defined('SCRIPT_DEBUG')) {
                print 'Updated nickname (and URI) for Twitter user ' .
                    "$fuser->id to $screen_name, was $fuser->nickname\n";
            }
        }

        return $result;

    } else {
        return add_twitter_user($twitter_id, $screen_name);
    }

    $fuser->free();
    unset($fuser);

    return true;
}

function retreive_twitter_friends($twitter_id, $screen_name, $password)
{
    $friends = array();

    $uri = "http://twitter.com/statuses/friends/$twitter_id.json?page=";
    $friends_ids = twitter_friends_ids($screen_name, $password);

    if (!$friends_ids) {
        return $friends;
    }

    if (defined('SCRIPT_DEBUG')) {
        print "Twitter 'social graph' ids method says $screen_name has " .
            count($friends_ids) . " friends.\n";
    }

    // Calculate how many pages to get...
    $pages = ceil(count($friends_ids) / 100);

    if ($pages == 0) {
        common_log(LOG_WARNING,
            "Twitter bridge - $screen_name seems to have no friends.");
        if (defined('SCRIPT_DEBUG')) {
            print "$screen_name seems to have no friends.\n";
        }
    }

    for ($i = 1; $i <= $pages; $i++) {

        $data = get_twitter_data($uri . $i, $screen_name, $password);

        if (!$data) {
            common_log(LOG_WARNING,
                "Twitter bridge - Couldn't retrieve page $i of $screen_name's friends.");
            if (defined('SCRIPT_DEBUG')) {
                print "Couldn't retrieve page $i of $screen_name's friends.\n";
            }
            continue;
        }

        $more_friends = json_decode($data);

        if (!$more_friends) {

            common_log(LOG_WARNING,
                "Twitter bridge - No data for page $i of $screen_name's friends.");
            if (defined('SCRIPT_DEBUG')) {
                print "No data for page $i of $screen_name's friends.\n";
            }
            continue;
        }

         $friends = array_merge($friends, $more_friends);
    }

    return $friends;
}

function save_twitter_friends($user, $twitter_id, $screen_name, $password)
{

    $friends = retreive_twitter_friends($twitter_id, $screen_name, $password);

    if (empty($friends)) {
        common_debug("Twitter bridge - Couldn't get friends data from Twitter for $screen_name.");
        if (defined('SCRIPT_DEBUG')) {
            print "Couldn't get friends data from Twitter for $screen_name.\n";
        }
        return false;
    }

    foreach ($friends as $friend) {

        $friend_name = $friend->screen_name;
        $friend_id = (int) $friend->id;

        // Update or create the Foreign_user record
        if (!save_twitter_user($friend_id, $friend_name)) {
            common_log(LOG_WARNING,
                "Twitter bridge - couldn't save $screen_name's friend, $friend_name.");
            if (defined('SCRIPT_DEBUG')) {
                print "Couldn't save $screen_name's friend, $friend_name.\n";
            }
            continue;
        }

        // Check to see if there's a related local user
        $flink = Foreign_link::getByForeignID($friend_id, 1);

        if ($flink) {

            // Get associated user and subscribe her
            $friend_user = User::staticGet('id', $flink->user_id);
            if (!empty($friend_user)) {
                $result = subs_subscribe_to($user, $friend_user);

                if ($result === true) {
                    common_debug("Twitter bridge - subscribed $friend_user->nickname to $user->nickname.");
                    if (defined('SCRIPT_DEBUG')) {
                        print("Subscribed $friend_user->nickname to $user->nickname.\n");
                    }
                } else {
                    if (defined('SCRIPT_DEBUG')) {
                        print "$result ($friend_user->nickname to $user->nickname)\n";
                    }
                }
            }
        }
    }

    return true;
}

function is_twitter_bound($notice, $flink) {

    // Check to see if notice should go to Twitter
    if (!empty($flink) && ($flink->noticesync & FOREIGN_NOTICE_SEND)) {

        // If it's not a Twitter-style reply, or if the user WANTS to send replies.
        if (!preg_match('/^@[a-zA-Z0-9_]{1,15}\b/u', $notice->content) ||
            ($flink->noticesync & FOREIGN_NOTICE_SEND_REPLY)) {
                return true;
        }
    }

    return false;
}

function broadcast_twitter($notice)
{
    $success = true;

    $flink = Foreign_link::getByUserID($notice->profile_id,
        TWITTER_SERVICE);

    // XXX: Not sure WHERE to check whether a notice should go to
    // Twitter. Should we even put in the queue if it shouldn't? --Zach
    if (!is_null($flink) && is_twitter_bound($notice, $flink)) {

        $fuser = $flink->getForeignUser();
        $twitter_user = $fuser->nickname;
        $twitter_password = $flink->credentials;
        $uri = 'http://www.twitter.com/statuses/update.json';

        // XXX: Hack to get around PHP cURL's use of @ being a a meta character
        $statustxt = preg_replace('/^@/', ' @', $notice->content);

        $options = array(
            CURLOPT_USERPWD        => "$twitter_user:$twitter_password",
            CURLOPT_POST           => true,
            CURLOPT_POSTFIELDS     =>
                array(
                        'status' => $statustxt,
                        'source' => common_config('integration', 'source')
                     ),
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_FAILONERROR    => true,
            CURLOPT_HEADER         => false,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_USERAGENT      => "Laconica",
            CURLOPT_CONNECTTIMEOUT => 120,  // XXX: How long should this be?
            CURLOPT_TIMEOUT        => 120,

            # Twitter is strict about accepting invalid "Expect" headers
            CURLOPT_HTTPHEADER => array('Expect:')
            );

        $ch = curl_init($uri);
        curl_setopt_array($ch, $options);
        $data = curl_exec($ch);
        $errmsg = curl_error($ch);

        if ($errmsg) {
            common_debug("cURL error: $errmsg - " .
                "trying to send notice for $twitter_user.",
                         __FILE__);
            $success = false;
        }

        curl_close($ch);

        if (!$data) {
            common_debug("No data returned by Twitter's " .
                "API trying to send update for $twitter_user",
                         __FILE__);
            $success = false;
        }

        // Twitter should return a status
        $status = json_decode($data);

        if (!$status->id) {
            common_debug("Unexpected data returned by Twitter " .
                " API trying to send update for $twitter_user",
                         __FILE__);
            $success = false;
        }
    }

    return $success;
}