src/Module/Search/Index.php

   1 <?php
   2
   3 namespace Friendica\Module\Search;
   4
   5 use Friendica\App\Arguments;
   6 use Friendica\App\BaseURL;
   7 use Friendica\Content\Nav;
   8 use Friendica\Content\Pager;
   9 use Friendica\Content\Text\HTML;
  10 use Friendica\Content\Widget;
  11 use Friendica\Core\Cache;
  12 use Friendica\Core\Cache\Cache as CacheClass;
  13 use Friendica\Core\Config;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Logger;
  16 use Friendica\Core\Renderer;
  17 use Friendica\Core\Session;
  18 use Friendica\Database\DBA;
  19 use Friendica\DI;
  20 use Friendica\Model\Contact;
  21 use Friendica\Model\Item;
  22 use Friendica\Model\Term;
  23 use Friendica\Module\BaseSearchModule;
  24 use Friendica\Network\HTTPException;
  25 use Friendica\Util\Strings;
  26
  27 class Index extends BaseSearchModule
  28 {
  29         public static function content(array $parameters = [])
  30         {
  31                 $search = (!empty($_GET['q']) ? Strings::escapeTags(trim(rawurldecode($_GET['q']))) : '');
  32
  33                 if (Config::get('system', 'block_public') && !Session::isAuthenticated()) {
  34                         throw new HTTPException\ForbiddenException(L10n::t('Public access denied.'));
  35                 }
  36
  37                 if (Config::get('system', 'local_search') && !Session::isAuthenticated()) {
  38                         $e = new HTTPException\ForbiddenException(L10n::t('Only logged in users are permitted to perform a search.'));
  39                         $e->httpdesc = L10n::t('Public access denied.');
  40                         throw $e;
  41                 }
  42
  43                 if (Config::get('system', 'permit_crawling') && !Session::isAuthenticated()) {
  44                         // Default values:
  45                         // 10 requests are "free", after the 11th only a call per minute is allowed
  46
  47                         $free_crawls = intval(Config::get('system', 'free_crawls'));
  48                         if ($free_crawls == 0)
  49                                 $free_crawls = 10;
  50
  51                         $crawl_permit_period = intval(Config::get('system', 'crawl_permit_period'));
  52                         if ($crawl_permit_period == 0)
  53                                 $crawl_permit_period = 10;
  54
  55                         $remote = $_SERVER['REMOTE_ADDR'];
  56                         $result = Cache::get('remote_search:' . $remote);
  57                         if (!is_null($result)) {
  58                                 $resultdata = json_decode($result);
  59                                 if (($resultdata->time > (time() - $crawl_permit_period)) && ($resultdata->accesses > $free_crawls)) {
  60                                         throw new HTTPException\TooManyRequestsException(L10n::t('Only one search per minute is permitted for not logged in users.'));
  61                                 }
  62                                 Cache::set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => $resultdata->accesses + 1]), CacheClass::HOUR);
  63                         } else {
  64                                 Cache::set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => 1]), CacheClass::HOUR);
  65                         }
  66                 }
  67
  68                 if (local_user()) {
  69                         DI::page()['aside'] .= Widget\SavedSearches::getHTML('search?q=' . urlencode($search), $search);
  70                 }
  71
  72                 Nav::setSelected('search');
  73
  74                 $tag = false;
  75                 if (!empty($_GET['tag'])) {
  76                         $tag = true;
  77                         $search = '#' . Strings::escapeTags(trim(rawurldecode($_GET['tag'])));
  78                 }
  79
  80                 // contruct a wrapper for the search header
  81                 $o = Renderer::replaceMacros(Renderer::getMarkupTemplate('content_wrapper.tpl'), [
  82                         'name' => 'search-header',
  83                         '$title' => L10n::t('Search'),
  84                         '$title_size' => 3,
  85                         '$content' => HTML::search($search, 'search-box', false)
  86                 ]);
  87
  88                 if (!$search) {
  89                         return $o;
  90                 }
  91
  92                 if (strpos($search, '#') === 0) {
  93                         $tag = true;
  94                         $search = substr($search, 1);
  95                 }
  96
  97                 self::tryRedirectToProfile($search);
  98
  99                 if (strpos($search, '@') === 0 || strpos($search, '!') === 0) {
 100                         return self::performContactSearch($search);
 101                 }
 102
 103                 self::tryRedirectToPost($search);
 104
 105                 if (!empty($_GET['search-option'])) {
 106                         switch ($_GET['search-option']) {
 107                                 case 'fulltext':
 108                                         break;
 109                                 case 'tags':
 110                                         $tag = true;
 111                                         break;
 112                                 case 'contacts':
 113                                         return self::performContactSearch($search, '@');
 114                                 case 'forums':
 115                                         return self::performContactSearch($search, '!');
 116                         }
 117                 }
 118
 119                 $tag = $tag || Config::get('system', 'only_tag_search');
 120
 121                 // Here is the way permissions work in the search module...
 122                 // Only public posts can be shown
 123                 // OR your own posts if you are a logged in member
 124                 // No items will be shown if the member has a blocked profile wall.
 125
 126                 $pager = new Pager(DI::args()->getQueryString());
 127
 128                 if ($tag) {
 129                         Logger::info('Start tag search.', ['q' => $search]);
 130
 131                         $condition = [
 132                                 "(`uid` = 0 OR (`uid` = ? AND NOT `global`))
 133                                 AND `otype` = ? AND `type` = ? AND `term` = ?",
 134                                 local_user(), Term::OBJECT_TYPE_POST, Term::HASHTAG, $search
 135                         ];
 136                         $params = [
 137                                 'order' => ['received' => true],
 138                                 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]
 139                         ];
 140                         $terms = DBA::select('term', ['oid'], $condition, $params);
 141
 142                         $itemids = [];
 143                         while ($term = DBA::fetch($terms)) {
 144                                 $itemids[] = $term['oid'];
 145                         }
 146
 147                         DBA::close($terms);
 148
 149                         if (!empty($itemids)) {
 150                                 $params = ['order' => ['id' => true]];
 151                                 $items = Item::selectForUser(local_user(), [], ['id' => $itemids], $params);
 152                                 $r = Item::inArray($items);
 153                         } else {
 154                                 $r = [];
 155                         }
 156                 } else {
 157                         Logger::info('Start fulltext search.', ['q' => $search]);
 158
 159                         $condition = [
 160                                 "(`uid` = 0 OR (`uid` = ? AND NOT `global`))
 161                                 AND `body` LIKE CONCAT('%',?,'%')",
 162                                 local_user(), $search
 163                         ];
 164                         $params = [
 165                                 'order' => ['id' => true],
 166                                 'limit' => [$pager->getStart(), $pager->getItemsPerPage()]
 167                         ];
 168                         $items = Item::selectForUser(local_user(), [], $condition, $params);
 169                         $r = Item::inArray($items);
 170                 }
 171
 172                 if (!DBA::isResult($r)) {
 173                         info(L10n::t('No results.'));
 174                         return $o;
 175                 }
 176
 177                 if ($tag) {
 178                         $title = L10n::t('Items tagged with: %s', $search);
 179                 } else {
 180                         $title = L10n::t('Results for: %s', $search);
 181                 }
 182
 183                 $o .= Renderer::replaceMacros(Renderer::getMarkupTemplate('section_title.tpl'), [
 184                         '$title' => $title
 185                 ]);
 186
 187                 Logger::info('Start Conversation.', ['q' => $search]);
 188
 189                 $o .= conversation(DI::app(), $r, $pager, 'search', false, false, 'commented', local_user());
 190
 191                 $o .= $pager->renderMinimal(count($r));
 192
 193                 return $o;
 194         }
 195
 196         /**
 197          * Tries to redirect to a local profile page based on the input.
 198          *
 199          * This method separates logged in and anonymous users. Logged in users can trigger contact probes to import
 200          * non-existing contacts while anonymous users can only trigger a local lookup.
 201          *
 202          * Formats matched:
 203          * - @user@domain
 204          * - user@domain
 205          * - Any fully-formed URL
 206          *
 207          * @param string  $search
 208          * @throws HTTPException\InternalServerErrorException
 209          * @throws \ImagickException
 210          */
 211         private static function tryRedirectToProfile(string $search)
 212         {
 213                 $isUrl = !empty(parse_url($search, PHP_URL_SCHEME));
 214                 $isAddr = (bool)preg_match('/^@?([a-z0-9.-_]+@[a-z0-9.-_:]+)$/i', trim($search), $matches);
 215
 216                 if (!$isUrl && !$isAddr) {
 217                         return;
 218                 }
 219
 220                 if ($isAddr) {
 221                         $search = $matches[1];
 222                 }
 223
 224                 if (local_user()) {
 225                         // User-specific contact URL/address search
 226                         $contact_id = Contact::getIdForURL($search, local_user());
 227                         if (!$contact_id) {
 228                                 // User-specific contact URL/address search and probe
 229                                 $contact_id = Contact::getIdForURL($search);
 230                         }
 231                 } else {
 232                         // Cheaper local lookup for anonymous users, no probe
 233                         if ($isAddr) {
 234                                 $contact = Contact::selectFirst(['id' => 'cid'], ['addr' => $search, 'uid' => 0]);
 235                         } else {
 236                                 $contact = Contact::getDetailsByURL($search, 0, ['cid' => 0]);
 237                         }
 238
 239                         if (DBA::isResult($contact)) {
 240                                 $contact_id = $contact['cid'];
 241                         }
 242                 }
 243
 244                 if (!empty($contact_id)) {
 245                         DI::baseUrl()->redirect('contact/' . $contact_id);
 246                 }
 247         }
 248
 249         /**
 250          * Fetch/search a post by URL and redirects to its local representation if it was found.
 251          *
 252          * @param string  $search
 253          * @throws HTTPException\InternalServerErrorException
 254          */
 255         private static function tryRedirectToPost(string $search)
 256         {
 257                 if (parse_url($search, PHP_URL_SCHEME) == '') {
 258                         return;
 259                 }
 260
 261                 if (local_user()) {
 262                         // Post URL search
 263                         $item_id = Item::fetchByLink($search, local_user());
 264                         if (!$item_id) {
 265                                 // If the user-specific search failed, we search and probe a public post
 266                                 $item_id = Item::fetchByLink($search);
 267                         }
 268                 } else {
 269                         // Cheaper local lookup for anonymous users, no probe
 270                         $item_id = Item::searchByLink($search);
 271                 }
 272
 273                 if (!empty($item_id)) {
 274                         $item = Item::selectFirst(['guid'], ['id' => $item_id]);
 275                         if (DBA::isResult($item)) {
 276                                 DI::baseUrl()->redirect('display/' . $item['guid']);
 277                         }
 278                 }
 279         }
 280 }