3 * StatusNet, the distributed open-source microblogging tool
5 * Data class for user location preferences
9 * LICENCE: This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Affero General Public License as published by
11 * the Free Software Foundation, either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Affero General Public License for more details.
19 * You should have received a copy of the GNU Affero General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author Evan Prodromou <evan@status.net>
25 * @copyright 2009 StatusNet Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
27 * @link http://status.net/
30 require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
32 class Inbox extends Memcached_DataObject
35 const MAX_NOTICES = 1024;
38 /* the code below is auto generated do not remove the above tag */
40 public $__table = 'inbox'; // table name
41 public $user_id; // int(4) primary_key not_null
42 public $notice_ids; // blob
45 function staticGet($k,$v=NULL) { return Memcached_DataObject::staticGet('Inbox',$k,$v); }
47 /* the code above is auto generated do not remove the tag below */
50 function sequenceKey()
52 return array(false, false, false);
56 * Create a new inbox from existing Notice_inbox stuff
58 static function initialize($user_id)
60 $inbox = Inbox::fromNoticeInbox($user_id);
64 $result = $inbox->insert();
67 common_log_db_error($inbox, 'INSERT', __FILE__);
74 static function fromNoticeInbox($user_id)
78 $ni = new Notice_inbox();
80 $ni->user_id = $user_id;
82 $ni->selectAdd('notice_id');
83 $ni->orderBy('notice_id DESC');
84 $ni->limit(0, self::MAX_NOTICES);
88 $ids[] = $ni->notice_id;
97 $inbox->user_id = $user_id;
105 * Append the given notice to the given user's inbox.
106 * Caching updates are managed for the inbox itself.
108 * If the notice is already in this inbox, the second
109 * add will be silently dropped.
111 * @param int @user_id
112 * @param int $notice_id
113 * @return boolean success
115 static function insertNotice($user_id, $notice_id)
117 // Going straight to the DB rather than trusting our caching
118 // during an update. Note: not using DB_DataObject::staticGet,
119 // which is unsafe to use directly (in-process caching causes
120 // memory leaks, which accumulate in queue processes).
121 $inbox = new Inbox();
122 if (!$inbox->get('user_id', $user_id)) {
123 $inbox = Inbox::initialize($user_id);
130 $ids = $inbox->unpack();
131 if (in_array(intval($notice_id), $ids)) {
132 // Already in there, we probably re-ran some inbox adds
133 // due to an error. Skip the dupe silently.
137 $result = $inbox->query(sprintf('UPDATE inbox '.
138 'set notice_ids = concat(cast(0x%08x as binary(4)), '.
139 'substr(notice_ids, 1, %d)) '.
140 'WHERE user_id = %d',
142 4 * (self::MAX_NOTICES - 1),
146 self::blow('inbox:user_id:%d', $user_id);
152 static function bulkInsert($notice_id, $user_ids)
154 foreach ($user_ids as $user_id)
156 Inbox::insertNotice($user_id, $notice_id);
160 function stream($user_id, $offset, $limit, $since_id, $max_id, $own=false)
162 $inbox = Inbox::staticGet('user_id', $user_id);
165 $inbox = Inbox::fromNoticeInbox($user_id);
173 $ids = $inbox->unpack();
175 if (!empty($since_id)) {
177 foreach ($ids as $id) {
178 if ($id > $since_id) {
185 if (!empty($max_id)) {
187 foreach ($ids as $id) {
188 if ($id <= $max_id) {
195 $ids = array_slice($ids, $offset, $limit);
201 * Wrapper for Inbox::stream() and Notice::getStreamByIds() returning
202 * additional items up to the limit if we were short due to deleted
203 * notices still being listed in the inbox.
205 * This is meant to assist threaded views, and optimizes paging for
206 * threadness. Not ideal for very late pages, as we have to bump about
207 * through all previous items.
209 * Should avoid duplicates in paging, though.
211 * @param int $user_id
212 * @param int $offset skip past the most recent N notices (after since_id checks)
214 * @param mixed $since_id return only notices after but not including this id
215 * @param mixed $max_id return only notices up to and including this id
216 * @param mixed $own ignored?
217 * @return array of Notice objects
219 * @todo consider repacking the inbox when this happens?
220 * @fixme reimplement $own if we need it?
222 function streamNoticesThreaded($user_id, $offset, $limit, $since_id, $max_id, $own=false)
224 // So what we want is:
225 // * slurp in the beginning of the notice list
226 // * filter out deleted notices
227 // * replace any reply notices with their conversation roots
228 // * filter out any duplicate conversations
229 // * return $limit notices after skipping $offset from the most recent
231 $ids = self::stream($user_id, 0, self::MAX_NOTICES, $since_id, $max_id, $own);
233 // Do a bulk lookup for the first $limit items
234 // Fast path when nothing's deleted.
235 $firstChunk = array_slice($ids, 0, $offset + $limit);
236 $notices = NoticeStream::getStreamByIds($firstChunk);
238 assert($notices instanceof ArrayWrapper);
239 $items = $notices->_items;
241 // Extract the latest non-deleted item in each convo
242 $noticeByConvo = array();
243 foreach ($items as $notice) {
244 if (empty($noticeByConvo[$notice->conversation])) {
245 $noticeByConvo[$notice->conversation] = $notice;
249 $wanted = count($firstChunk); // raw entry count in the inbox up to our $limit
250 // There were deleted notices, we'll need to look for more.
251 $remainder = array_slice($ids, $limit);
253 for ($i = $offset + $limit; count($noticeByConvo) < $wanted && $i < count($ids); $i++) {
254 $notice = Notice::staticGet($ids[$i]);
255 if ($notice && empty($noticeByConvo[$notice->conversation])) {
256 $noticeByConvo[$notice->conversation] = $notice;
260 $slice = array_slice($noticeByConvo, $offset, $limit, false);
261 return new ArrayWrapper($slice);
265 * Wrapper for Inbox::stream() and Notice::getStreamByIds() returning
266 * additional items up to the limit if we were short due to deleted
267 * notices still being listed in the inbox.
269 * The fast path (when no items are deleted) should be just as fast; the
270 * offset parameter is applied *before* lookups for maximum efficiency.
272 * This means offset-based paging may show duplicates, but similar behavior
273 * already exists when new notices are posted between page views, so we
274 * think people will be ok with this until id-based paging is introduced
275 * to the user interface.
277 * @param int $user_id
278 * @param int $offset skip past the most recent N notices (after since_id checks)
280 * @param mixed $since_id return only notices after but not including this id
281 * @param mixed $max_id return only notices up to and including this id
282 * @param mixed $own ignored?
283 * @return array of Notice objects
285 * @todo consider repacking the inbox when this happens?
286 * @fixme reimplement $own if we need it?
288 function streamNotices($user_id, $offset, $limit, $since_id, $max_id, $own=false)
290 $ids = self::stream($user_id, $offset, self::MAX_NOTICES, $since_id, $max_id, $own);
292 // Do a bulk lookup for the first $limit items
293 // Fast path when nothing's deleted.
294 $firstChunk = array_slice($ids, 0, $limit);
295 $notices = NoticeStream::getStreamByIds($firstChunk);
297 $wanted = count($firstChunk); // raw entry count in the inbox up to our $limit
298 if ($notices->N >= $wanted) {
302 // There were deleted notices, we'll need to look for more.
303 assert($notices instanceof ArrayWrapper);
304 $items = $notices->_items;
305 $remainder = array_slice($ids, $limit);
307 while (count($items) < $wanted && count($remainder) > 0) {
308 $notice = Notice::staticGet(array_shift($remainder));
314 return new ArrayWrapper($items);
318 * Saves a list of integer notice_ids into a packed blob in this object.
319 * @param array $ids list of integer notice_ids
321 protected function pack(array $ids)
323 $this->notice_ids = call_user_func_array('pack', array_merge(array('N*'), $ids));
327 * @return array of integer notice_ids
329 protected function unpack()
331 return unpack('N*', $this->notice_ids);