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