src/Module/Conversation/Timeline.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module\Conversation;
  23
  24 use Friendica\App;
  25 use Friendica\App\Mode;
  26 use Friendica\BaseModule;
  27 use Friendica\Content\Conversation\Collection\Timelines;
  28 use Friendica\Content\Conversation\Entity\Channel as ChannelEntity;
  29 use Friendica\Content\Conversation\Repository\UserDefinedChannel;
  30 use Friendica\Core\Cache\Capability\ICanCache;
  31 use Friendica\Core\Cache\Enum\Duration;
  32 use Friendica\Core\Config\Capability\IManageConfigValues;
  33 use Friendica\Core\L10n;
  34 use Friendica\Core\PConfig\Capability\IManagePersonalConfigValues;
  35 use Friendica\Core\Renderer;
  36 use Friendica\Core\Session\Capability\IHandleUserSessions;
  37 use Friendica\Model\Contact;
  38 use Friendica\Model\User;
  39 use Friendica\Database\Database;
  40 use Friendica\Database\DBA;
  41 use Friendica\Model\Item;
  42 use Friendica\Model\Post;
  43 use Friendica\Model\Post\Engagement;
  44 use Friendica\Module\Response;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Profiler;
  47 use Psr\Log\LoggerInterface;
  48
  49 class Timeline extends BaseModule
  50 {
  51         /** @var string */
  52         protected $selectedTab;
  53         /** @var mixed */
  54         protected $minId;
  55         /** @var mixed */
  56         protected $maxId;
  57         /** @var string */
  58         protected $accountTypeString;
  59         /** @var int */
  60         protected $accountType;
  61         /** @var int */
  62         protected $itemUriId;
  63         /** @var int */
  64         protected $itemsPerPage;
  65         /** @var bool */
  66         protected $noSharer;
  67         /** @var bool */
  68         protected $force;
  69         /** @var bool */
  70         protected $update;
  71         /** @var bool */
  72         protected $raw;
  73
  74         /** @var App\Mode $mode */
  75         protected $mode;
  76         /** @var IHandleUserSessions */
  77         protected $session;
  78         /** @var Database */
  79         protected $database;
  80         /** @var IManagePersonalConfigValues */
  81         protected $pConfig;
  82         /** @var IManageConfigValues The config */
  83         protected $config;
  84         /** @var ICanCache */
  85         protected $cache;
  86         /** @var UserDefinedChannel */
  87         protected $channelRepository;
  88
  89         public function __construct(UserDefinedChannel $channel, Mode $mode, IHandleUserSessions $session, Database $database, IManagePersonalConfigValues $pConfig, IManageConfigValues $config, ICanCache $cache, L10n $l10n, App\BaseURL $baseUrl, App\Arguments $args, LoggerInterface $logger, Profiler $profiler, Response $response, array $server, array $parameters = [])
  90         {
  91                 parent::__construct($l10n, $baseUrl, $args, $logger, $profiler, $response, $server, $parameters);
  92
  93                 $this->channelRepository = $channel;
  94                 $this->mode              = $mode;
  95                 $this->session           = $session;
  96                 $this->database          = $database;
  97                 $this->pConfig           = $pConfig;
  98                 $this->config            = $config;
  99                 $this->cache             = $cache;
 100         }
 101
 102         /**
 103          * Computes module parameters from the request and local configuration
 104          *
 105          * @throws HTTPException\BadRequestException
 106          * @throws HTTPException\ForbiddenException
 107          */
 108         protected function parseRequest(array $request)
 109         {
 110                 $this->logger->debug('Got request', $request);
 111                 $this->selectedTab = $this->parameters['content'] ?? $request['channel'] ?? '';
 112
 113                 $this->accountTypeString = $request['accounttype'] ?? $this->parameters['accounttype'] ?? '';
 114                 $this->accountType       = User::getAccountTypeByString($this->accountTypeString);
 115
 116                 if ($this->mode->isMobile()) {
 117                         $this->itemsPerPage = $this->pConfig->get(
 118                                 $this->session->getLocalUserId(),
 119                                 'system',
 120                                 'itemspage_mobile_network',
 121                                 $this->config->get('system', 'itemspage_network_mobile')
 122                         );
 123                 } else {
 124                         $this->itemsPerPage = $this->pConfig->get(
 125                                 $this->session->getLocalUserId(),
 126                                 'system',
 127                                 'itemspage_network',
 128                                 $this->config->get('system', 'itemspage_network')
 129                         );
 130                 }
 131
 132                 if (!empty($request['item'])) {
 133                         $item            = Post::selectFirst(['parent', 'parent-uri-id'], ['id' => $request['item']]);
 134                         $this->itemUriId = $item['parent-uri-id'] ?? 0;
 135                 } else {
 136                         $this->itemUriId = 0;
 137                 }
 138
 139                 $this->minId = $request['min_id'] ?? null;
 140                 $this->maxId = $request['max_id'] ?? null;
 141
 142                 $this->noSharer = !empty($request['no_sharer']);
 143                 $this->force    = !empty($request['force']) && !empty($request['item']);
 144                 $this->update   = !empty($request['force']) && !empty($request['first_received']) && !empty($request['first_created']) && !empty($request['first_uriid']) && !empty($request['first_commented']);
 145                 $this->raw      = !empty($request['mode']) && ($request['mode'] == 'raw');
 146         }
 147
 148         protected function getNoSharerWidget(string $base): string
 149         {
 150                 $path = $this->selectedTab;
 151                 if (!empty($this->accountTypeString)) {
 152                         $path .= '/' . $this->accountTypeString;
 153                 }
 154                 $query_parameters = [];
 155
 156                 if (!empty($this->minId)) {
 157                         $query_parameters['min_id'] = $this->minId;
 158                 }
 159                 if (!empty($this->maxId)) {
 160                         $query_parameters['max_id'] = $this->maxId;
 161                 }
 162
 163                 $path_all       = $path . (!empty($query_parameters) ? '?' . http_build_query($query_parameters) : '');
 164                 $path_no_sharer = $path . '?' . http_build_query(array_merge($query_parameters, ['no_sharer' => true]));
 165                 return Renderer::replaceMacros(Renderer::getMarkupTemplate('widget/community_sharer.tpl'), [
 166                         '$title'           => $this->l10n->t('Own Contacts'),
 167                         '$path_all'        => $path_all,
 168                         '$path_no_sharer'  => $path_no_sharer,
 169                         '$no_sharer'       => $this->noSharer,
 170                         '$all'             => $this->l10n->t('Include'),
 171                         '$no_sharer_label' => $this->l10n->t('Hide'),
 172                         '$base'            => $base,
 173                 ]);
 174         }
 175
 176         protected function getTabArray(Timelines $timelines, string $prefix, string $parameter = ''): array
 177         {
 178                 $tabs = [];
 179
 180                 foreach ($timelines as $tab) {
 181                         if (is_null($tab->path) && !empty($parameter)) {
 182                                 $path = $prefix . '?' . http_build_query([$parameter => $tab->code]);
 183                         } else {
 184                                 $path = $tab->path ?? $prefix . '/' . $tab->code;
 185                         }
 186                         $tabs[$tab->code] = [
 187                                 'code'      => $tab->code,
 188                                 'label'     => $tab->label,
 189                                 'url'       => $path,
 190                                 'sel'       => $this->selectedTab == $tab->code ? 'active' : '',
 191                                 'title'     => $tab->description,
 192                                 'id'        => $prefix . '-' . $tab->code . '-tab',
 193                                 'accesskey' => $tab->accessKey,
 194                         ];
 195                 }
 196                 return $tabs;
 197         }
 198
 199         /**
 200          * Database query for the channel page
 201          *
 202          * @return array
 203          * @throws \Exception
 204          */
 205         protected function getChannelItems()
 206         {
 207                 $items = $this->getRawChannelItems();
 208
 209                 $contacts = $this->database->selectToArray('user-contact', ['cid'], ['channel-frequency' => Contact\User::FREQUENCY_REDUCED, 'cid' => array_column($items, 'owner-id')]);
 210                 $reduced  = array_column($contacts, 'cid');
 211
 212                 $maxpostperauthor = $this->config->get('channel', 'max_posts_per_author');
 213
 214                 if ($maxpostperauthor != 0) {
 215                         $count          = 1;
 216                         $owner_posts    = [];
 217                         $selected_items = [];
 218
 219                         while (count($selected_items) < $this->itemsPerPage && ++$count < 50 && count($items) > 0) {
 220                                 $maxposts = round((count($items) / $this->itemsPerPage) * $maxpostperauthor);
 221                                 $minId = $items[array_key_first($items)]['created'];
 222                                 $maxId = $items[array_key_last($items)]['created'];
 223
 224                                 foreach ($items as $item) {
 225                                         if (!in_array($item['owner-id'], $reduced)) {
 226                                                 continue;
 227                                         }
 228                                         $owner_posts[$item['owner-id']][$item['uri-id']] = (($item['comments'] * 100) + $item['activities']);
 229                                 }
 230                                 foreach ($owner_posts as $posts) {
 231                                         if (count($posts) <= $maxposts) {
 232                                                 continue;
 233                                         }
 234                                         asort($posts);
 235                                         while (count($posts) > $maxposts) {
 236                                                 $uri_id = array_key_first($posts);
 237                                                 unset($posts[$uri_id]);
 238                                                 unset($items[$uri_id]);
 239                                         }
 240                                 }
 241                                 $selected_items = array_merge($selected_items, $items);
 242
 243                                 // If we're looking at a "previous page", the lookup continues forward in time because the list is
 244                                 // sorted in chronologically decreasing order
 245                                 if (!empty($this->minId)) {
 246                                         $this->minId = $minId;
 247                                 } else {
 248                                         // In any other case, the lookup continues backwards in time
 249                                         $this->maxId = $maxId;
 250                                 }
 251
 252                                 if (count($selected_items) < $this->itemsPerPage) {
 253                                         $items = $this->getRawChannelItems();
 254                                 }
 255                         }
 256                 } else {
 257                         $selected_items = $items;
 258                 }
 259
 260                 $condition = ['unseen' => true, 'uid' => $this->session->getLocalUserId(), 'parent-uri-id' => array_column($selected_items, 'uri-id')];
 261                 $this->setItemsSeenByCondition($condition);
 262
 263                 return $selected_items;
 264         }
 265
 266         /**
 267          * Database query for the channel page
 268          *
 269          * @return array
 270          * @throws \Exception
 271          */
 272         private function getRawChannelItems()
 273         {
 274                 $uid = $this->session->getLocalUserId();
 275
 276                 if ($this->selectedTab == ChannelEntity::WHATSHOT) {
 277                         if (!is_null($this->accountType)) {
 278                                 $condition = ["(`comments` > ? OR `activities` > ?) AND `contact-type` = ?", $this->getMedianComments($uid, 4), $this->getMedianActivities($uid, 4), $this->accountType];
 279                         } else {
 280                                 $condition = ["(`comments` > ? OR `activities` > ?) AND `contact-type` != ?", $this->getMedianComments($uid, 4), $this->getMedianActivities($uid, 4), Contact::TYPE_COMMUNITY];
 281                         }
 282                 } elseif ($this->selectedTab == ChannelEntity::FORYOU) {
 283                         $cid = Contact::getPublicIdByUserId($uid);
 284
 285                         $condition = [
 286                                 "(`owner-id` IN (SELECT `cid` FROM `contact-relation` WHERE `relation-cid` = ? AND `relation-thread-score` > ?) OR
 287                                 ((`comments` >= ? OR `activities` >= ?) AND `owner-id` IN (SELECT `cid` FROM `contact-relation` WHERE `follows` AND `relation-cid` = ?)) OR
 288                                 (`owner-id` IN (SELECT `cid` FROM `user-contact` WHERE `uid` = ? AND (`notify_new_posts` OR `channel-frequency` = ?))))",
 289                                 $cid, $this->getMedianRelationThreadScore($cid, 4), $this->getMedianComments($uid, 4), $this->getMedianActivities($uid, 4), $cid,
 290                                 $uid, Contact\User::FREQUENCY_ALWAYS
 291                         ];
 292                 } elseif ($this->selectedTab == ChannelEntity::FOLLOWERS) {
 293                         $condition = ["`owner-id` IN (SELECT `pid` FROM `account-user-view` WHERE `uid` = ? AND `rel` = ?)", $uid, Contact::FOLLOWER];
 294                 } elseif ($this->selectedTab == ChannelEntity::SHARERSOFSHARERS) {
 295                         $cid = Contact::getPublicIdByUserId($uid);
 296
 297                         // @todo Suggest posts from contacts that are followed most by our followers
 298                         $condition = [
 299                                 "`owner-id` IN (SELECT `cid` FROM `contact-relation` WHERE `follows` AND `last-interaction` > ?
 300                                 AND `relation-cid` IN (SELECT `cid` FROM `contact-relation` WHERE `follows` AND `relation-cid` = ? AND `relation-thread-score` >= ?)
 301                                 AND NOT `cid` IN (SELECT `cid` FROM `contact-relation` WHERE `follows` AND `relation-cid` = ?))",
 302                                 DateTimeFormat::utc('now - ' . $this->config->get('channel', 'sharer_interaction_days') . ' day'), $cid, $this->getMedianRelationThreadScore($cid, 4), $cid
 303                         ];
 304                 } elseif ($this->selectedTab == ChannelEntity::IMAGE) {
 305                         $condition = ["`media-type` & ?", 1];
 306                 } elseif ($this->selectedTab == ChannelEntity::VIDEO) {
 307                         $condition = ["`media-type` & ?", 2];
 308                 } elseif ($this->selectedTab == ChannelEntity::AUDIO) {
 309                         $condition = ["`media-type` & ?", 4];
 310                 } elseif ($this->selectedTab == ChannelEntity::LANGUAGE) {
 311                         $condition = ["JSON_EXTRACT(JSON_KEYS(language), '$[0]') = ?", User::getLanguageCode($uid)];
 312                 } elseif (is_numeric($this->selectedTab)) {
 313                         $condition = $this->getUserChannelConditions($this->selectedTab, $this->session->getLocalUserId());
 314                 }
 315
 316                 if ($this->selectedTab != ChannelEntity::LANGUAGE) {
 317                         $condition = $this->addLanguageCondition($uid, $condition);
 318                 }
 319
 320                 $condition = DBA::mergeConditions($condition, ["(NOT `restricted` OR EXISTS(SELECT `id` FROM `post-user` WHERE `uid` = ? AND `uri-id` = `post-engagement`.`uri-id`))", $uid]);
 321
 322                 $condition = DBA::mergeConditions($condition, ["NOT EXISTS(SELECT `cid` FROM `user-contact` WHERE `uid` = ? AND `cid` = `post-engagement`.`owner-id` AND (`ignored` OR `blocked` OR `collapsed` OR `is-blocked` OR `channel-frequency` = ?))", $uid, Contact\User::FREQUENCY_NEVER]);
 323
 324                 if (($this->selectedTab != ChannelEntity::WHATSHOT) && !is_null($this->accountType)) {
 325                         $condition = DBA::mergeConditions($condition, ['contact-type' => $this->accountType]);
 326                 }
 327
 328                 $params = ['order' => ['created' => true], 'limit' => $this->itemsPerPage];
 329
 330                 if (!empty($this->itemUriId)) {
 331                         $condition = DBA::mergeConditions($condition, ['uri-id' => $this->itemUriId]);
 332                 } else {
 333                         if ($this->noSharer) {
 334                                 $condition = DBA::mergeConditions($condition, ["NOT `uri-id` IN (SELECT `uri-id` FROM `post-user` WHERE `post-user`.`uid` = ? AND `post-user`.`uri-id` = `post-engagement`.`uri-id`)", $this->session->getLocalUserId()]);
 335                         }
 336
 337                         if (isset($this->maxId)) {
 338                                 $condition = DBA::mergeConditions($condition, ["`created` < ?", $this->maxId]);
 339                         }
 340
 341                         if (isset($this->minId)) {
 342                                 $condition = DBA::mergeConditions($condition, ["`created` > ?", $this->minId]);
 343
 344                                 // Previous page case: we want the items closest to min_id but for that we need to reverse the query order
 345                                 if (!isset($this->maxId)) {
 346                                         $params['order']['created'] = false;
 347                                 }
 348                         }
 349                 }
 350
 351                 $items = [];
 352                 $result = $this->database->select('post-engagement', ['uri-id', 'created', 'owner-id', 'comments', 'activities'], $condition, $params);
 353                 if ($this->database->errorNo()) {
 354                         throw new \Exception($this->database->errorMessage(), $this->database->errorNo());
 355                 }
 356
 357                 while ($item = $this->database->fetch($result)) {
 358                         $items[$item['uri-id']] = $item;
 359                 }
 360                 $this->database->close($result);
 361
 362                 if (empty($items)) {
 363                         return [];
 364                 }
 365
 366                 // Previous page case: once we get the relevant items closest to min_id, we need to restore the expected display order
 367                 if (empty($this->itemUriId) && isset($this->minId) && !isset($this->maxId)) {
 368                         $items = array_reverse($items, true);
 369                 }
 370
 371                 $condition = ['unseen' => true, 'uid' => $uid, 'parent-uri-id' => array_column($items, 'uri-id')];
 372                 $this->setItemsSeenByCondition($condition);
 373
 374                 return $items;
 375         }
 376
 377         private function getUserChannelConditions(int $id, int $uid): array
 378         {
 379                 $channel = $this->channelRepository->selectById($id, $uid);
 380                 if (empty($channel)) {
 381                         return [];
 382                 }
 383
 384                 $condition = [];
 385
 386                 if (!empty($channel->circle)) {
 387                         if ($channel->circle == -1) {
 388                                 $condition = ["`owner-id` IN (SELECT `pid` FROM `account-user-view` WHERE `uid` = ? AND `rel` IN (?, ?))", $uid, Contact::SHARING, Contact::FRIEND];
 389                         } elseif ($channel->circle == -2) {
 390                                 $condition = ["`owner-id` IN (SELECT `pid` FROM `account-user-view` WHERE `uid` = ? AND `rel` = ?)", $uid, Contact::FOLLOWER];
 391                         } elseif ($channel->circle == -3) {
 392                                 $condition = ["EXISTS(SELECT `uri-id` FROM `post-thread-user` WHERE `uid` = ? AND `post-thread-user`.`uri-id` = `post-engagement`.`uri-id`)", $uid];
 393                         } elseif ($channel->circle > 0) {
 394                                 $condition = DBA::mergeConditions($condition, ["`owner-id` IN (SELECT `pid` FROM `group_member` INNER JOIN `account-user-view` ON `group_member`.`contact-id` = `account-user-view`.`id` WHERE `gid` = ? AND `account-user-view`.`uid` = ?)", $channel->circle, $uid]);
 395                         }
 396                 }
 397
 398                 if (!empty($channel->fullTextSearch)) {
 399                         $search = $channel->fullTextSearch;
 400                         foreach (Engagement::KEYWORDS as $keyword) {
 401                                 $search = preg_replace('~(' . $keyword . ':.[\w@\.-]+)~', '"$1"', $search);
 402                         }
 403                         $condition = DBA::mergeConditions($condition, ["MATCH (`searchtext`) AGAINST (? IN BOOLEAN MODE)", $search]);
 404                 }
 405
 406                 if (!empty($channel->includeTags)) {
 407                         $search       = explode(',', mb_strtolower($channel->includeTags));
 408                         $placeholders = substr(str_repeat("?, ", count($search)), 0, -2);
 409                         $condition    = DBA::mergeConditions($condition, array_merge(["`uri-id` IN (SELECT `uri-id` FROM `post-tag` INNER JOIN `tag` ON `tag`.`id` = `post-tag`.`tid` WHERE `post-tag`.`type` = 1 AND `name` IN (" . $placeholders . "))"], $search));
 410                 }
 411
 412                 if (!empty($channel->excludeTags)) {
 413                         $search       = explode(',', mb_strtolower($channel->excludeTags));
 414                         $placeholders = substr(str_repeat("?, ", count($search)), 0, -2);
 415                         $condition    = DBA::mergeConditions($condition, array_merge(["NOT `uri-id` IN (SELECT `uri-id` FROM `post-tag` INNER JOIN `tag` ON `tag`.`id` = `post-tag`.`tid` WHERE `post-tag`.`type` = 1 AND `name` IN (" . $placeholders . "))"], $search));
 416                 }
 417
 418                 if (!empty($channel->mediaType)) {
 419                         $condition = DBA::mergeConditions($condition, ["`media-type` & ?", $channel->mediaType]);
 420                 }
 421
 422                 // For "addLanguageCondition" to work, the condition must not be empty
 423                 return $condition ?: ["true"];
 424         }
 425
 426         private function addLanguageCondition(int $uid, array $condition): array
 427         {
 428                 $conditions = [];
 429                 $languages  = User::getWantedLanguages($uid);
 430                 foreach ($languages as $language) {
 431                         $conditions[] = "JSON_EXTRACT(JSON_KEYS(language), '$[0]') = ?";
 432                         $condition[]  = $language;
 433                 }
 434                 if (!empty($conditions)) {
 435                         $condition[0] .= " AND (`language` IS NULL OR " . implode(' OR ', $conditions) . ")";
 436                 }
 437                 return $condition;
 438         }
 439
 440         private function getMedianComments(int $uid, int $divider): int
 441         {
 442                 $languages = User::getWantedLanguages($uid);
 443                 $cache_key = 'Channel:getMedianComments:' . $divider . ':' . implode(':', $languages);
 444                 $comments  = $this->cache->get($cache_key);
 445                 if (!empty($comments)) {
 446                         return $comments;
 447                 }
 448
 449                 $condition = ["`contact-type` != ? AND `comments` > ? AND NOT `restricted`", Contact::TYPE_COMMUNITY, 0];
 450                 $condition = $this->addLanguageCondition($uid, $condition);
 451
 452                 $limit    = $this->database->count('post-engagement', $condition) / $divider;
 453                 $post     = $this->database->selectToArray('post-engagement', ['comments'], $condition, ['order' => ['comments' => true], 'limit' => [$limit, 1]]);
 454                 $comments = $post[0]['comments'] ?? 0;
 455                 if (empty($comments)) {
 456                         return 0;
 457                 }
 458
 459                 $this->cache->set($cache_key, $comments, Duration::HALF_HOUR);
 460                 $this->logger->debug('Calculated median comments', ['divider' => $divider, 'languages' => $languages, 'median' => $comments]);
 461                 return $comments;
 462         }
 463
 464         private function getMedianActivities(int $uid, int $divider): int
 465         {
 466                 $languages  = User::getWantedLanguages($uid);
 467                 $cache_key  = 'Channel:getMedianActivities:' . $divider . ':' . implode(':', $languages);
 468                 $activities = $this->cache->get($cache_key);
 469                 if (!empty($activities)) {
 470                         return $activities;
 471                 }
 472
 473                 $condition = ["`contact-type` != ? AND `activities` > ? AND NOT `restricted`", Contact::TYPE_COMMUNITY, 0];
 474                 $condition = $this->addLanguageCondition($uid, $condition);
 475
 476                 $limit      = $this->database->count('post-engagement', $condition) / $divider;
 477                 $post       = $this->database->selectToArray('post-engagement', ['activities'], $condition, ['order' => ['activities' => true], 'limit' => [$limit, 1]]);
 478                 $activities = $post[0]['activities'] ?? 0;
 479                 if (empty($activities)) {
 480                         return 0;
 481                 }
 482
 483                 $this->cache->set($cache_key, $activities, Duration::HALF_HOUR);
 484                 $this->logger->debug('Calculated median activities', ['divider' => $divider, 'languages' => $languages, 'median' => $activities]);
 485                 return $activities;
 486         }
 487
 488         private function getMedianRelationThreadScore(int $cid, int $divider): int
 489         {
 490                 $cache_key = 'Channel:getThreadScore:' . $cid . ':' . $divider;
 491                 $score     = $this->cache->get($cache_key);
 492                 if (!empty($score)) {
 493                         return $score;
 494                 }
 495
 496                 $condition = ["`relation-cid` = ? AND `relation-thread-score` > ?", $cid, 0];
 497
 498                 $limit    = $this->database->count('contact-relation', $condition) / $divider;
 499                 $relation = $this->database->selectToArray('contact-relation', ['relation-thread-score'], $condition, ['order' => ['relation-thread-score' => true], 'limit' => [$limit, 1]]);
 500                 $score    = $relation[0]['relation-thread-score'] ?? 0;
 501                 if (empty($score)) {
 502                         return 0;
 503                 }
 504
 505                 $this->cache->set($cache_key, $score, Duration::HALF_HOUR);
 506                 $this->logger->debug('Calculated median score', ['cid' => $cid, 'divider' => $divider, 'median' => $score]);
 507                 return $score;
 508         }
 509
 510         /**
 511          * Computes the displayed items.
 512          *
 513          * Community pages have a restriction on how many successive posts by the same author can show on any given page,
 514          * so we may have to retrieve more content beyond the first query
 515          *
 516          * @return array
 517          * @throws \Exception
 518          */
 519         protected function getCommunityItems()
 520         {
 521                 $items = $this->selectItems();
 522
 523                 if ($this->selectedTab == 'local') {
 524                         $maxpostperauthor = (int)$this->config->get('system', 'max_author_posts_community_page');
 525                         $key = 'author-id';
 526                 } elseif ($this->selectedTab == 'global') {
 527                         $maxpostperauthor = (int)$this->config->get('system', 'max_server_posts_community_page');
 528                         $key = 'author-gsid';
 529                 } else {
 530                         $maxpostperauthor = 0;
 531                 }
 532                 if ($maxpostperauthor != 0) {
 533                         $count          = 1;
 534                         $author_posts   = [];
 535                         $selected_items = [];
 536
 537                         while (count($selected_items) < $this->itemsPerPage && ++$count < 50 && count($items) > 0) {
 538                                 $maxposts = round((count($items) / $this->itemsPerPage) * $maxpostperauthor);
 539                                 $minId = $items[array_key_first($items)]['received'];
 540                                 $maxId = $items[array_key_last($items)]['received'];
 541
 542                                 foreach ($items as $item) {
 543                                         $author_posts[$item[$key]][$item['uri-id']] = $item['received'];
 544                                 }
 545                                 foreach ($author_posts as $posts) {
 546                                         if (count($posts) <= $maxposts) {
 547                                                 continue;
 548                                         }
 549                                         asort($posts);
 550                                         while (count($posts) > $maxposts) {
 551                                                 $uri_id = array_key_first($posts);
 552                                                 unset($posts[$uri_id]);
 553                                                 unset($items[$uri_id]);
 554                                         }
 555                                 }
 556                                 $selected_items = array_merge($selected_items, $items);
 557
 558                                 // If we're looking at a "previous page", the lookup continues forward in time because the list is
 559                                 // sorted in chronologically decreasing order
 560                                 if (!empty($this->minId)) {
 561                                         $this->minId = $minId;
 562                                 } else {
 563                                         // In any other case, the lookup continues backwards in time
 564                                         $this->maxId = $maxId;
 565                                 }
 566
 567                                 if (count($selected_items) < $this->itemsPerPage) {
 568                                         $items = $this->selectItems();
 569                                 }
 570                         }
 571                 } else {
 572                         $selected_items = $items;
 573                 }
 574
 575                 $condition = ['unseen' => true, 'uid' => $this->session->getLocalUserId(), 'parent-uri-id' => array_column($selected_items, 'uri-id')];
 576                 $this->setItemsSeenByCondition($condition);
 577
 578                 return $selected_items;
 579         }
 580
 581         /**
 582          * Database query for the community page
 583          *
 584          * @return array
 585          * @throws \Exception
 586          * @TODO Move to repository/factory
 587          */
 588         private function selectItems()
 589         {
 590                 if ($this->selectedTab == 'local') {
 591                         $condition = ["`wall` AND `origin` AND `private` = ?", Item::PUBLIC];
 592                 } elseif ($this->selectedTab == 'global') {
 593                         $condition = ["`uid` = ? AND `private` = ?", 0, Item::PUBLIC];
 594                 } else {
 595                         return [];
 596                 }
 597
 598                 if (!is_null($this->accountType)) {
 599                         $condition = DBA::mergeConditions($condition, ['owner-contact-type' => $this->accountType]);
 600                 }
 601
 602                 $params = ['order' => ['received' => true], 'limit' => $this->itemsPerPage];
 603
 604                 if (!empty($this->itemUriId)) {
 605                         $condition = DBA::mergeConditions($condition, ['uri-id' => $this->itemUriId]);
 606                 } else {
 607                         if ($this->session->getLocalUserId() && $this->noSharer) {
 608                                 $condition = DBA::mergeConditions($condition, ["NOT `uri-id` IN (SELECT `uri-id` FROM `post-user` WHERE `post-user`.`uid` = ? AND `post-user`.`uri-id` = `post-thread-user-view`.`uri-id`)", $this->session->getLocalUserId()]);
 609                         }
 610
 611                         if (isset($this->maxId)) {
 612                                 $condition = DBA::mergeConditions($condition, ["`received` < ?", $this->maxId]);
 613                         }
 614
 615                         if (isset($this->minId)) {
 616                                 $condition = DBA::mergeConditions($condition, ["`received` > ?", $this->minId]);
 617
 618                                 // Previous page case: we want the items closest to min_id but for that we need to reverse the query order
 619                                 if (!isset($this->maxId)) {
 620                                         $params['order']['received'] = false;
 621                                 }
 622                         }
 623                 }
 624
 625                 $items = [];
 626                 $result = Post::selectThreadForUser($this->session->getLocalUserId() ?: 0, ['uri-id', 'received', 'author-id', 'author-gsid'], $condition, $params);
 627
 628                 while ($item = $this->database->fetch($result)) {
 629                         $items[$item['uri-id']] = $item;
 630                 }
 631                 $this->database->close($result);
 632
 633                 if (empty($items)) {
 634                         return [];
 635                 }
 636
 637                 // Previous page case: once we get the relevant items closest to min_id, we need to restore the expected display order
 638                 if (empty($this->itemUriId) && isset($this->minId) && !isset($this->maxId)) {
 639                         $items = array_reverse($items);
 640                 }
 641
 642                 return $items;
 643         }
 644
 645         /**
 646          * Sets items as seen
 647          *
 648          * @param array $condition The array with the SQL condition
 649          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 650          */
 651         protected function setItemsSeenByCondition(array $condition)
 652         {
 653                 if (empty($condition)) {
 654                         return;
 655                 }
 656
 657                 $unseen = Post::exists($condition);
 658
 659                 if ($unseen) {
 660                         /// @todo handle huge "unseen" updates in the background to avoid timeout errors
 661                         Item::update(['unseen' => false], $condition);
 662                 }
 663         }
 664 }