src/Module/Search/Index.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2021, 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\Search;
  23
  24 use Friendica\Content\Nav;
  25 use Friendica\Content\Pager;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Content\Widget;
  28 use Friendica\Core\Cache\Enum\Duration;
  29 use Friendica\Core\Logger;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\Search;
  32 use Friendica\Core\Session;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Model\Contact;
  36 use Friendica\Model\Item;
  37 use Friendica\Model\Post;
  38 use Friendica\Model\Tag;
  39 use Friendica\Module\BaseSearch;
  40 use Friendica\Network\HTTPException;
  41
  42 class Index extends BaseSearch
  43 {
  44         public static function content(array $parameters = [])
  45         {
  46                 $search = (!empty($_GET['q']) ? trim(rawurldecode($_GET['q'])) : '');
  47
  48                 if (DI::config()->get('system', 'block_public') && !Session::isAuthenticated()) {
  49                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Public access denied.'));
  50                 }
  51
  52                 if (DI::config()->get('system', 'local_search') && !Session::isAuthenticated()) {
  53                         throw new HTTPException\ForbiddenException(DI::l10n()->t('Only logged in users are permitted to perform a search.'));
  54                 }
  55
  56                 if (DI::config()->get('system', 'permit_crawling') && !Session::isAuthenticated()) {
  57                         // Default values:
  58                         // 10 requests are "free", after the 11th only a call per minute is allowed
  59
  60                         $free_crawls = intval(DI::config()->get('system', 'free_crawls'));
  61                         if ($free_crawls == 0)
  62                                 $free_crawls = 10;
  63
  64                         $crawl_permit_period = intval(DI::config()->get('system', 'crawl_permit_period'));
  65                         if ($crawl_permit_period == 0)
  66                                 $crawl_permit_period = 10;
  67
  68                         $remote = $_SERVER['REMOTE_ADDR'];
  69                         $result = DI::cache()->get('remote_search:' . $remote);
  70                         if (!is_null($result)) {
  71                                 $resultdata = json_decode($result);
  72                                 if (($resultdata->time > (time() - $crawl_permit_period)) && ($resultdata->accesses > $free_crawls)) {
  73                                         throw new HTTPException\TooManyRequestsException(DI::l10n()->t('Only one search per minute is permitted for not logged in users.'));
  74                                 }
  75                                 DI::cache()->set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => $resultdata->accesses + 1]), Duration::HOUR);
  76                         } else {
  77                                 DI::cache()->set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => 1]), Duration::HOUR);
  78                         }
  79                 }
  80
  81                 if (local_user()) {
  82                         DI::page()['aside'] .= Widget\SavedSearches::getHTML(Search::getSearchPath($search), $search);
  83                 }
  84
  85                 Nav::setSelected('search');
  86
  87                 $tag = false;
  88                 if (!empty($_GET['tag'])) {
  89                         $tag = true;
  90                         $search = '#' . trim(rawurldecode($_GET['tag']));
  91                 }
  92
  93                 // contruct a wrapper for the search header
  94                 $o = Renderer::replaceMacros(Renderer::getMarkupTemplate('content_wrapper.tpl'), [
  95                         'name' => 'search-header',
  96                         '$title' => DI::l10n()->t('Search'),
  97                         '$title_size' => 3,
  98                         '$content' => HTML::search($search, 'search-box', false)
  99                 ]);
 100
 101                 if (!$search) {
 102                         return $o;
 103                 }
 104
 105                 if (strpos($search, '#') === 0) {
 106                         $tag = true;
 107                         $search = substr($search, 1);
 108                 }
 109
 110                 self::tryRedirectToProfile($search);
 111
 112                 if (strpos($search, '@') === 0 || strpos($search, '!') === 0) {
 113                         return self::performContactSearch($search);
 114                 }
 115
 116                 self::tryRedirectToPost($search);
 117
 118                 if (!empty($_GET['search-option'])) {
 119                         switch ($_GET['search-option']) {
 120                                 case 'fulltext':
 121                                         break;
 122                                 case 'tags':
 123                                         $tag = true;
 124                                         break;
 125                                 case 'contacts':
 126                                         return self::performContactSearch($search, '@');
 127                                 case 'forums':
 128                                         return self::performContactSearch($search, '!');
 129                         }
 130                 }
 131
 132                 // Don't perform a fulltext or tag search on search results that look like an URL
 133                 // Tags don't look like an URL and the fulltext search does only work with natural words
 134                 if (parse_url($search, PHP_URL_SCHEME) && parse_url($search, PHP_URL_HOST)) {
 135                         Logger::info('Skipping tag and fulltext search since the search looks like a URL.', ['q' => $search]);
 136                         notice(DI::l10n()->t('No results.'));
 137                         return $o;
 138                 }
 139
 140                 $tag = $tag || DI::config()->get('system', 'only_tag_search');
 141
 142                 // Here is the way permissions work in the search module...
 143                 // Only public posts can be shown
 144                 // OR your own posts if you are a logged in member
 145                 // No items will be shown if the member has a blocked profile wall.
 146
 147                 if (DI::mode()->isMobile()) {
 148                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
 149                                 DI::config()->get('system', 'itemspage_network_mobile'));
 150                 } else {
 151                         $itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
 152                                 DI::config()->get('system', 'itemspage_network'));
 153                 }
 154
 155                 $last_uriid = isset($_GET['last_uriid']) ? intval($_GET['last_uriid']) : 0;
 156
 157                 $pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
 158
 159                 if ($tag) {
 160                         Logger::info('Start tag search.', ['q' => $search]);
 161                         $uriids = Tag::getURIIdListByTag($search, local_user(), $pager->getStart(), $pager->getItemsPerPage(), $last_uriid);
 162                         $count = Tag::countByTag($search, local_user());
 163                 } else {
 164                         Logger::info('Start fulltext search.', ['q' => $search]);
 165                         $uriids = Post\Content::getURIIdListBySearch($search, local_user(), $pager->getStart(), $pager->getItemsPerPage(), $last_uriid);
 166                         $count = Post\Content::countBySearch($search, local_user());
 167                 }
 168
 169                 if (!empty($uriids)) {
 170                         $condition = ["(`uid` = ? OR (`uid` = ? AND NOT `global`))", 0, local_user()];
 171                         $condition = DBA::mergeConditions($condition, ['uri-id' => $uriids]);
 172                         $params = ['order' => ['id' => true]];
 173                         $items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
 174                 }
 175
 176                 if (empty($items)) {
 177                         if (empty($last_uriid)) {
 178                                 notice(DI::l10n()->t('No results.'));
 179                         }
 180                         return $o;
 181                 }
 182
 183                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
 184                         $tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
 185                         $o .= Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
 186                 }
 187
 188                 if ($tag) {
 189                         $title = DI::l10n()->t('Items tagged with: %s', $search);
 190                 } else {
 191                         $title = DI::l10n()->t('Results for: %s', $search);
 192                 }
 193
 194                 $o .= Renderer::replaceMacros(Renderer::getMarkupTemplate('section_title.tpl'), [
 195                         '$title' => $title
 196                 ]);
 197
 198                 Logger::info('Start Conversation.', ['q' => $search]);
 199
 200                 $o .= DI::conversation()->create($items, 'search', false, false, 'commented', local_user());
 201
 202                 if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
 203                         $o .= HTML::scrollLoader();
 204                 } else {
 205                         $o .= $pager->renderMinimal($count);
 206                 }
 207
 208
 209                 return $o;
 210         }
 211
 212         /**
 213          * Tries to redirect to a local profile page based on the input.
 214          *
 215          * This method separates logged in and anonymous users. Logged in users can trigger contact probes to import
 216          * non-existing contacts while anonymous users can only trigger a local lookup.
 217          *
 218          * Formats matched:
 219          * - @user@domain
 220          * - user@domain
 221          * - Any fully-formed URL
 222          *
 223          * @param string  $search
 224          * @throws HTTPException\InternalServerErrorException
 225          * @throws \ImagickException
 226          */
 227         private static function tryRedirectToProfile(string $search)
 228         {
 229                 $isUrl = !empty(parse_url($search, PHP_URL_SCHEME));
 230                 $isAddr = (bool)preg_match('/^@?([a-z0-9.-_]+@[a-z0-9.-_:]+)$/i', trim($search), $matches);
 231
 232                 if (!$isUrl && !$isAddr) {
 233                         return;
 234                 }
 235
 236                 if ($isAddr) {
 237                         $search = $matches[1];
 238                 }
 239
 240                 if (local_user()) {
 241                         // User-specific contact URL/address search
 242                         $contact_id = Contact::getIdForURL($search, local_user());
 243                         if (!$contact_id) {
 244                                 // User-specific contact URL/address search and probe
 245                                 $contact_id = Contact::getIdForURL($search);
 246                         }
 247                 } else {
 248                         // Cheaper local lookup for anonymous users, no probe
 249                         if ($isAddr) {
 250                                 $contact = Contact::selectFirst(['id'], ['addr' => $search, 'uid' => 0]);
 251                         } else {
 252                                 $contact = Contact::getByURL($search, null, ['id']) ?: ['id' => 0];
 253                         }
 254
 255                         if (DBA::isResult($contact)) {
 256                                 $contact_id = $contact['id'];
 257                         }
 258                 }
 259
 260                 if (!empty($contact_id)) {
 261                         DI::baseUrl()->redirect('contact/' . $contact_id);
 262                 }
 263         }
 264
 265         /**
 266          * Fetch/search a post by URL and redirects to its local representation if it was found.
 267          *
 268          * @param string  $search
 269          * @throws HTTPException\InternalServerErrorException
 270          */
 271         private static function tryRedirectToPost(string $search)
 272         {
 273                 if (parse_url($search, PHP_URL_SCHEME) == '') {
 274                         return;
 275                 }
 276
 277                 if (local_user()) {
 278                         // Post URL search
 279                         $item_id = Item::fetchByLink($search, local_user());
 280                         if (!$item_id) {
 281                                 // If the user-specific search failed, we search and probe a public post
 282                                 $item_id = Item::fetchByLink($search);
 283                         }
 284                 } else {
 285                         // Cheaper local lookup for anonymous users, no probe
 286                         $item_id = Item::searchByLink($search);
 287                 }
 288
 289                 if (!empty($item_id)) {
 290                         $item = Post::selectFirst(['guid'], ['id' => $item_id]);
 291                         if (DBA::isResult($item)) {
 292                                 DI::baseUrl()->redirect('display/' . $item['guid']);
 293                         }
 294                 }
 295         }
 296 }