streams/Zotlabs/Module/Search.php

<?php
namespace Zotlabs\Module;

use App;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\Activity;
use Zotlabs\Lib\ActivityStreams;
use Zotlabs\Lib\ASCollection;
use Zotlabs\Lib\Queue;
use Zotlabs\Daemon\Run;

require_once("include/bbcode.php");
require_once('include/security.php');
require_once('include/conversation.php');


class Search extends Controller {

	// State passed in from the Update module.
	
	public $profile_uid = 0;
	public $loading     = 0;
	public $updating    = 0;


	function init() {
		if (x($_REQUEST,'search')) {
			App::$data['search'] = escape_tags($_REQUEST['search']);
		}
	}
	
	
	function get() {

		if ((get_config('system','block_public')) || (get_config('system','block_public_search',1))) {
			if ((! local_channel()) && (! remote_channel())) {
				notice( t('Public access denied.') . EOL);
				return;
			}
		}
	
		if ($this->loading) {
			$_SESSION['loadtime'] = datetime_convert();
		}
		nav_set_selected('Search');
	
		$format = (($_REQUEST['format']) ? $_REQUEST['format'] : '');
		if ($format !== '') {
			$this->updating = $this->loading = 1;
		}
	
		$observer = App::get_observer();
		$observer_hash = (($observer) ? $observer['xchan_hash'] : '');
	
		$o = '<div id="live-search"></div>' . "\r\n";
		$o .= '<div class="generic-content-wrapper-styled">' . "\r\n";
		$o .= '<h3>' . t('Search') . '</h3>';
	
		if (x(App::$data,'search')) {
			$search = trim(App::$data['search']);
		}
		else {
			$search = ((x($_GET,'search')) ? trim(escape_tags(rawurldecode($_GET['search']))) : '');
		}
		$tag = false;
		if (x($_GET,'tag')) {
			$tag = true;
			$search = ((x($_GET,'tag')) ? trim(escape_tags(rawurldecode($_GET['tag']))) : '');
		}

		$static = ((array_key_exists('static',$_REQUEST)) ? intval($_REQUEST['static']) : 0);
	
		$o .= search($search,'search-box','/search',((local_channel()) ? true : false));

		// ActivityStreams object fetches from the navbar
		
		if (local_channel() && strpos($search,'https://') === 0 && (! $this->updating) && (! $this->loading)) {
			logger('searching for ActivityPub');
			$channel = App::get_channel();
			$hash = EMPTY_STR;
			$j = Activity::fetch($search,$channel);
			if ($j) {
				if (isset($j['type']) && ActivityStreams::is_an_actor($j['type'])) {
					Activity::actor_store($j['id'],$j);
					goaway(z_root() . '/directory' . '?f=1&navsearch=1&search=' . $search);			
				}
				$AS = new ActivityStreams($j, null, true);
				if ($AS->is_valid() && isset($AS->data['type'])) {
					if (is_array($AS->obj)) {
						// matches Collection and orderedCollection
						if (isset($AS->obj['type']) && strpos($AS->obj['type'],'Collection') !== false) {

							// Collections are awkward to process because they can be huge.
							// Our strategy is to limit a navbar search to 100 Collection items
							// and only fetch the first 10 conversations in the foreground.
							// We'll queue the rest, and then send you to a page where
							// you can see something we've imported. 
							// In theory you'll start to see notifications as other conversations
 							// are fetched in the background while you're looking at the first ones.
							
							$max = intval(get_config('system','max_imported_search_collection',100));

							if (intval($max)) {
								$obj = new ASCollection($search, $channel, 0, $max);
								$messages = $obj->get();
								// logger('received: ' . print_r($messages,true));
								$author = null;
								if ($messages) {
									logger('received ' . count($messages) . ' items from collection.', LOGGER_DEBUG);
									$processed = 0;
									foreach ($messages as $message) {
										$processed ++;
										// only process the first several items in the foreground and
										// queue the remainder.
										if ($processed > 10) {

											$fetch_url = ((is_string($message)) ? $message : EMPTY_STR);
											$fetch_url = ((is_array($message) && array_key_exists('id',$message)) ? $message['id'] : $fetch_url);

											if (! $fetch_url) {
												continue;
											}
											
											$hash = new_uuid();
											Queue::insert(
											[
												'hash'       => $hash,
												'account_id' => $channel['channel_account_id'],
												'channel_id' => $channel['channel_id'],
												'posturl'    => $fetch_url,
												'notify'     => EMPTY_STR,
												'msg'        => EMPTY_STR,
												'driver'     => 'asfetch'
											]
											);
											continue;
										}

										if (is_string($message)) {
											$message = Activity::fetch($message,App::get_channel());
										}
										$AS = new ActivityStreams($message,null,true);
										if ($AS->is_valid() && is_array($AS->obj)) {
											$item = Activity::decode_note($AS,true);
										}
										if ($item) {
											if (! $author) {
												$author = $item['author_xchan'];
											}
											Activity::store(App::get_channel(),get_observer_hash(),$AS,$item, true, true);
										}
									}
									if ($hash) {
										Run::Summon( [ 'Deliver', $hash ] );
									}
								}
								
								// This will go to the right place most but not all of the time.
								// It will go to a relevant place all of the time, so we'll use it. 
								
								if ($author) {
									goaway(z_root() . '/stream/?xchan=' . urlencode($author));
								}
								goaway(z_root() . '/stream');
							}
						}
						else {
						
							// It wasn't a Collection object and wasn't an Actor object,
							// so let's see if it decodes. The boolean flag enables html
							// cache of the item
							
							$item = Activity::decode_note($AS,true);
							if ($item) {
								Activity::store(App::get_channel(),get_observer_hash(),$AS,$item, true, true);
								goaway(z_root() . '/display/' . gen_link_id($item['mid']));
							}
						}
					}
				}
			}
		}
		
		if (strpos($search,'#') === 0) {
			$tag = true;
			$search = substr($search,1);
		}
		if (strpos($search,'@') === 0) {
			$search = substr($search,1);
			goaway(z_root() . '/directory' . '?f=1&navsearch=1&search=' . $search);
		}
		if (strpos($search,'!') === 0) {
			$search = substr($search,1);
			goaway(z_root() . '/directory' . '?f=1&navsearch=1&search=' . $search);
		}
		if (strpos($search,'?') === 0) {
			$search = substr($search,1);
			goaway(z_root() . '/help' . '?f=1&navsearch=1&search=' . $search);
		}
	
		// look for a naked webbie
		if (strpos($search,'@') !== false && strpos($search,'http') !== 0) {
			goaway(z_root() . '/directory' . '?f=1&navsearch=1&search=' . $search);
		}
	
		if (! $search) {
			return $o;
		}
	
		if ($tag) {
			$wildtag = str_replace('*','%',$search);
			$sql_extra = sprintf(" AND item.id IN (select oid from term where otype = %d and ttype in ( %d , %d) and term like '%s') ",
				intval(TERM_OBJ_POST),
				intval(TERM_HASHTAG),
				intval(TERM_COMMUNITYTAG),
				dbesc(protect_sprintf($wildtag))
			);
		}
		else {
			$regstr = db_getfunc('REGEXP');
			$sql_extra = sprintf(" AND (item.title $regstr '%s' OR item.body $regstr '%s') ", dbesc(protect_sprintf(preg_quote($search))), dbesc(protect_sprintf(preg_quote($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 ((! $this->updating) && (! $this->loading)) {
	
			$static  = ((local_channel()) ? channel_manual_conv_update(local_channel()) : 0);


			// This is ugly, but we can't pass the profile_uid through the session to the ajax updater,
			// because browser prefetching might change it on us. We have to deliver it with the page.
	
			$o .= '<div id="live-search"></div>' . "\r\n";
			$o .= "<script> var profile_uid = " . ((intval(local_channel())) ? local_channel() : (-1))
				. "; var netargs = '?f='; var profile_page = " . App::$pager['page'] . "; </script>\r\n";
	
			App::$page['htmlhead'] .= replace_macros(get_markup_template("build_query.tpl"), [
				'$baseurl' => z_root(),
				'$pgtype' => 'search',
				'$uid' => ((App::$profile['profile_uid']) ? App::$profile['profile_uid'] : '0'),
				'$gid' => '0',
				'$cid' => '0',
				'$cmin' => '(-1)',
				'$cmax' => '(-1)',
				'$star' => '0',
				'$liked' => '0',
				'$conv' => '0',
				'$spam' => '0',
				'$fh' => '0',
				'$dm' => '0',
				'$nouveau' => '0',
				'$wall' => '0',
				'$draft' => '0',
				'$static' => $static,
				'$list' => ((x($_REQUEST,'list')) ? intval($_REQUEST['list']) : 0),
				'$page' => ((App::$pager['page'] != 1) ? App::$pager['page'] : 1),
				'$search' => (($tag) ? urlencode('#') : '') . $search,
				'$xchan' => '',
				'$order' => '',
				'$file' => '',
				'$cats' => '',
				'$tags' => '',
				'$mid' => '',
				'$verb' => '',
				'$net' => '',
				'$dend' => '',
				'$dbegin' => ''
			]);
	
	
		}
	
		$item_normal = item_normal_search();
		$pub_sql = item_permissions_sql(0,$observer_hash);
		
		$sys = get_sys_channel();
	
		if (($this->updating) && ($this->loading)) {
			$itemspage = get_pconfig(local_channel(),'system','itemspage');
			App::set_pager_itemspage(((intval($itemspage)) ? $itemspage : 20));
			$pager_sql = sprintf(" LIMIT %d OFFSET %d ", intval(App::$pager['itemspage']), intval(App::$pager['start']));
		
			if ($this->loading) {
				$r = null;

				// if logged in locally, first look in the items you own
				// and if this returns zero results, resort to searching elsewhere on the site.
				// Ideally these results would be merged but this can be difficult
				// and results in lots of duplicated content and/or messed up pagination
				
				if (local_channel()) {
					$r = q("SELECT mid, MAX(id) as item_id from item where uid = %d
						$item_normal
						$sql_extra
						group by mid, created order by created desc $pager_sql ",
						intval(local_channel())
					);
				}
				if (! $r) {
					$r = q("SELECT mid, MAX(id) as item_id from item WHERE true $pub_sql
						$item_normal
						$sql_extra 
						group by mid, created order by created desc $pager_sql"
					);
				}
				if ($r) {
					$str = ids_to_querystr($r,'item_id');
					$r = q("select *, id as item_id from item where id in ( " . $str . ") order by created desc ");
				}
			}
			else {
				$r = [];
			}
		
		}
	
		if ($r) {
			xchan_query($r);
			$items = fetch_post_tags($r,true);
		} else {
			$items = [];
		}

		if ($format == 'json') {
			$result = [];
			require_once('include/conversation.php');
			foreach ($items as $item) {
				$item['html'] = zidify_links(bbcode($item['body']));
				$x = encode_item($item);
				$x['html'] = prepare_text($item['body'],$item['mimetype']);
				$result[] = $x;
			}
			json_return_and_die(array('success' => true,'messages' => $result));
		}
	
		if ($tag) 
			$o .= '<h2>' . sprintf( t('Items tagged with: %s'), $search) . '</h2>';
		else
			$o .= '<h2>' . sprintf( t('Search results for: %s'), $search) . '</h2>';
	
		$o .= conversation($items,'search',$this->updating,'client');
	
		$o .= '</div>';
	
		return $o;
	}
	
}