friendica/src/Module/Search/Index.php

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<?php
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/**
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* @copyright Copyright (C) 2010-2022, the Friendica project
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*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace Friendica\Module\Search;
use Friendica\Content\Nav;
use Friendica\Content\Pager;
use Friendica\Content\Text\HTML;
use Friendica\Content\Widget;
use Friendica\Core\Cache\Enum\Duration;
use Friendica\Core\Logger;
use Friendica\Core\Renderer;
use Friendica\Core\Search;
use Friendica\Core\Session;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Model\Contact;
use Friendica\Model\Item;
use Friendica\Model\Post;
use Friendica\Model\Tag;
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use Friendica\Module\BaseSearch;
use Friendica\Network\HTTPException;
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use Friendica\Util\Network;
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class Index extends BaseSearch
{
protected function content(array $request = []): string
{
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$search = (!empty($_GET['q']) ? trim(rawurldecode($_GET['q'])) : '');
if (DI::config()->get('system', 'block_public') && !Session::isAuthenticated()) {
throw new HTTPException\ForbiddenException(DI::l10n()->t('Public access denied.'));
}
if (DI::config()->get('system', 'local_search') && !Session::isAuthenticated()) {
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throw new HTTPException\ForbiddenException(DI::l10n()->t('Only logged in users are permitted to perform a search.'));
}
if (DI::config()->get('system', 'permit_crawling') && !Session::isAuthenticated()) {
// Default values:
// 10 requests are "free", after the 11th only a call per minute is allowed
$free_crawls = intval(DI::config()->get('system', 'free_crawls'));
if ($free_crawls == 0)
$free_crawls = 10;
$crawl_permit_period = intval(DI::config()->get('system', 'crawl_permit_period'));
if ($crawl_permit_period == 0)
$crawl_permit_period = 10;
$remote = $_SERVER['REMOTE_ADDR'];
$result = DI::cache()->get('remote_search:' . $remote);
if (!is_null($result)) {
$resultdata = json_decode($result);
if (($resultdata->time > (time() - $crawl_permit_period)) && ($resultdata->accesses > $free_crawls)) {
throw new HTTPException\TooManyRequestsException(DI::l10n()->t('Only one search per minute is permitted for not logged in users.'));
}
DI::cache()->set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => $resultdata->accesses + 1]), Duration::HOUR);
} else {
DI::cache()->set('remote_search:' . $remote, json_encode(['time' => time(), 'accesses' => 1]), Duration::HOUR);
}
}
if (local_user()) {
DI::page()['aside'] .= Widget\SavedSearches::getHTML(Search::getSearchPath($search), $search);
}
Nav::setSelected('search');
$tag = false;
if (!empty($_GET['tag'])) {
$tag = true;
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$search = '#' . trim(rawurldecode($_GET['tag']));
}
// contruct a wrapper for the search header
$o = Renderer::replaceMacros(Renderer::getMarkupTemplate('content_wrapper.tpl'), [
'name' => 'search-header',
'$title' => DI::l10n()->t('Search'),
'$title_size' => 3,
'$content' => HTML::search($search, 'search-box', false)
]);
if (!$search) {
return $o;
}
if (strpos($search, '#') === 0) {
$tag = true;
$search = substr($search, 1);
}
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self::tryRedirectToProfile($search);
if (strpos($search, '@') === 0 || strpos($search, '!') === 0) {
return self::performContactSearch($search);
}
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self::tryRedirectToPost($search);
if (!empty($_GET['search-option'])) {
switch ($_GET['search-option']) {
case 'fulltext':
break;
case 'tags':
$tag = true;
break;
case 'contacts':
return self::performContactSearch($search, '@');
case 'forums':
return self::performContactSearch($search, '!');
}
}
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// Don't perform a fulltext or tag search on search results that look like an URL
// Tags don't look like an URL and the fulltext search does only work with natural words
if (parse_url($search, PHP_URL_SCHEME) && parse_url($search, PHP_URL_HOST)) {
Logger::info('Skipping tag and fulltext search since the search looks like a URL.', ['q' => $search]);
notice(DI::l10n()->t('No results.'));
return $o;
}
$tag = $tag || DI::config()->get('system', 'only_tag_search');
// Here is the way permissions work in the search module...
// Only public posts can be shown
// OR your own posts if you are a logged in member
// No items will be shown if the member has a blocked profile wall.
if (DI::mode()->isMobile()) {
$itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_mobile_network',
DI::config()->get('system', 'itemspage_network_mobile'));
} else {
$itemsPerPage = DI::pConfig()->get(local_user(), 'system', 'itemspage_network',
DI::config()->get('system', 'itemspage_network'));
}
$last_uriid = isset($_GET['last_uriid']) ? intval($_GET['last_uriid']) : 0;
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$pager = new Pager(DI::l10n(), DI::args()->getQueryString(), $itemsPerPage);
if ($tag) {
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Logger::info('Start tag search.', ['q' => $search]);
$uriids = Tag::getURIIdListByTag($search, local_user(), $pager->getStart(), $pager->getItemsPerPage(), $last_uriid);
$count = Tag::countByTag($search, local_user());
} else {
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Logger::info('Start fulltext search.', ['q' => $search]);
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$uriids = Post\Content::getURIIdListBySearch($search, local_user(), $pager->getStart(), $pager->getItemsPerPage(), $last_uriid);
$count = Post\Content::countBySearch($search, local_user());
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}
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if (!empty($uriids)) {
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$condition = ["(`uid` = ? OR (`uid` = ? AND NOT `global`))", 0, local_user()];
$condition = DBA::mergeConditions($condition, ['uri-id' => $uriids]);
$params = ['order' => ['id' => true]];
$items = Post::toArray(Post::selectForUser(local_user(), Item::DISPLAY_FIELDLIST, $condition, $params));
}
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if (empty($items)) {
if (empty($last_uriid)) {
notice(DI::l10n()->t('No results.'));
}
return $o;
}
if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
$tpl = Renderer::getMarkupTemplate('infinite_scroll_head.tpl');
$o .= Renderer::replaceMacros($tpl, ['$reload_uri' => DI::args()->getQueryString()]);
}
if ($tag) {
$title = DI::l10n()->t('Items tagged with: %s', $search);
} else {
$title = DI::l10n()->t('Results for: %s', $search);
}
$o .= Renderer::replaceMacros(Renderer::getMarkupTemplate('section_title.tpl'), [
'$title' => $title
]);
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Logger::info('Start Conversation.', ['q' => $search]);
$o .= DI::conversation()->create($items, 'search', false, false, 'commented', local_user());
if (DI::pConfig()->get(local_user(), 'system', 'infinite_scroll')) {
$o .= HTML::scrollLoader();
} else {
$o .= $pager->renderMinimal($count);
}
return $o;
}
/**
* Tries to redirect to a local profile page based on the input.
*
* This method separates logged in and anonymous users. Logged in users can trigger contact probes to import
* non-existing contacts while anonymous users can only trigger a local lookup.
*
* Formats matched:
* - @user@domain
* - user@domain
* - Any fully-formed URL
*
* @param string $search
* @throws HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
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private static function tryRedirectToProfile(string $search)
{
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$search = Network::convertToIdn($search);
$isUrl = !empty(parse_url($search, PHP_URL_SCHEME));
$isAddr = (bool)preg_match('/^@?([a-z0-9.-_]+@[a-z0-9.-_:]+)$/i', trim($search), $matches);
if (!$isUrl && !$isAddr) {
return;
}
if ($isAddr) {
$search = $matches[1];
}
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if (local_user()) {
// User-specific contact URL/address search
$contact_id = Contact::getIdForURL($search, local_user());
if (!$contact_id) {
// User-specific contact URL/address search and probe
$contact_id = Contact::getIdForURL($search);
}
} else {
// Cheaper local lookup for anonymous users, no probe
if ($isAddr) {
$contact = Contact::selectFirst(['id'], ['addr' => $search, 'uid' => 0]);
} else {
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$contact = Contact::getByURL($search, null, ['id']) ?: ['id' => 0];
}
if (DBA::isResult($contact)) {
$contact_id = $contact['id'];
}
}
if (!empty($contact_id)) {
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DI::baseUrl()->redirect('contact/' . $contact_id);
}
}
/**
* Fetch/search a post by URL and redirects to its local representation if it was found.
*
* @param string $search
* @throws HTTPException\InternalServerErrorException
*/
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private static function tryRedirectToPost(string $search)
{
if (parse_url($search, PHP_URL_SCHEME) == '') {
return;
}
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$search = Network::convertToIdn($search);
if (local_user()) {
// Post URL search
$item_id = Item::fetchByLink($search, local_user());
if (!$item_id) {
// If the user-specific search failed, we search and probe a public post
$item_id = Item::fetchByLink($search);
}
} else {
// Cheaper local lookup for anonymous users, no probe
$item_id = Item::searchByLink($search);
}
if (!empty($item_id)) {
$item = Post::selectFirst(['guid'], ['id' => $item_id]);
if (DBA::isResult($item)) {
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DI::baseUrl()->redirect('display/' . $item['guid']);
}
}
}
}