streams/Zotlabs/Module/Subthread.php

<?php
namespace Zotlabs\Module;

use App;
use Zotlabs\Web\Controller;
use Zotlabs\Lib\Activity;

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



class Subthread extends Controller {

	function get() {
	
		if (! local_channel()) {
			return;
		}
	
		$sys = get_sys_channel();
		$channel = App::get_channel();

		$item_id = ((argc() > 2) ? notags(trim(argv(2))) : 0);
	
		if (argv(1) === 'sub') {
			$activity = ACTIVITY_FOLLOW;
		}
		elseif (argv(1) === 'unsub') {
			$activity = ACTIVITY_IGNORE;
		}
	
		$i = q("select * from item where id = %d and uid = %d",
			intval($item_id),
			intval(local_channel())
		);

		if (! $i) {
			// try the global public stream
			$i = q("select * from item where id = %d and uid = %d",
				intval($postid),
				intval($sys['channel_id'])
			);
			// try the local public stream
			if (! $i) {
				$i = q("select * from item where id = %d and item_wall = 1 and item_private = 0",
					intval($postid)
				);
			}

			if ($i && local_channel() && (! is_sys_channel(local_channel()))) {
				$i = [ copy_of_pubitem($channel, $i[0]['mid']) ];
				$item_id = (($i) ? $i[0]['id'] : 0);
			}
		}
		
		if (! $i) {
			return;
		}

		$r = q("select * from item where id = parent and id = %d limit 1",
			dbesc($i[0]['parent'])
		);
	
		if ((! $item_id) || (! $r)) {
			logger('subthread: no item ' . $item_id);
			return;
		}
	
		$item = $r[0];
	
		$owner_uid = $item['uid'];
		$observer = App::get_observer();
		$ob_hash = (($observer) ? $observer['xchan_hash'] : '');
	
		if (! perm_is_allowed($owner_uid,$ob_hash,'post_comments')) {
			return;
		}
	
		$sys = get_sys_channel();
	
		$owner_uid = $item['uid'];
		$owner_aid = $item['aid'];
	
		// if this is a "discover" item, (item['uid'] is the sys channel),
		// fallback to the item comment policy, which should've been
		// respected when generating the conversation thread.
		// Even if the activity is rejected by the item owner, it should still get attached
		// to the local discover conversation on this site. 
	
		if (($owner_uid != $sys['channel_id']) && (! perm_is_allowed($owner_uid,$observer['xchan_hash'],'post_comments'))) {
			notice( t('Permission denied') . EOL);
			killme();
		}
	
		$r = q("select * from xchan where xchan_hash = '%s' limit 1",
			dbesc($item['owner_xchan'])
		);
		if ($r) {
			$thread_owner = $r[0];
		}
		else {
			killme();
		}
		
		$r = q("select * from xchan where xchan_hash = '%s' limit 1",
			dbesc($item['author_xchan'])
		);
		if ($r) {
			$item_author = $r[0];
		}
		else {
			killme();
		}
		
		$uuid = new_uuid();
		$mid = z_root() . '/item/' . $uuid;
	
		$post_type = (($item['resource_type'] === 'photo') ? t('photo') : t('status'));
	
		$links = array(array('rel' => 'alternate','type' => 'text/html', 'href' => $item['plink']));
		$objtype = (($item['resource_type'] === 'photo') ? ACTIVITY_OBJ_PHOTO : ACTIVITY_OBJ_NOTE ); 
	
		$body = $item['body'];

		$obj = Activity::fetch_item( [ 'id' => $item['mid'] ] );
		$objtype = $obj['type'];

		if (! intval($item['item_thread_top']))
			$post_type = 'comment';		
	
		if ($activity === ACTIVITY_FOLLOW) {
			$bodyverb = t('%1$s is following %2$s\'s %3$s');
		}
		if ($activity === ACTIVITY_IGNORE) {
			$bodyverb = t('%1$s stopped following %2$s\'s %3$s');
		}
		
		$arr = [];

		$arr['uuid']          = $uuid;	
		$arr['mid']           = $mid;
		$arr['aid']           = $owner_aid;
		$arr['uid']           = $owner_uid;
		$arr['parent']        = $item['id'];
		$arr['parent_mid']    = $item['mid'];
		$arr['thr_parent']    = $item['mid'];
		$arr['owner_xchan']   = $thread_owner['xchan_hash'];
		$arr['author_xchan']  = $observer['xchan_hash'];
		$arr['item_origin']   = 1;
		$arr['item_notshown'] = 1;

		if (intval($item['item_wall'])) {
			$arr['item_wall'] = 1;
		}
		else {
			$arr['item_wall'] = 0;
		}
		
		$ulink = '[zrl=' . $item_author['xchan_url'] . ']' . $item_author['xchan_name'] . '[/zrl]';
		$alink = '[zrl=' . $observer['xchan_url'] . ']' . $observer['xchan_name'] . '[/zrl]';
		$plink = '[zrl=' . z_root() . '/display/' . gen_link_id($item['mid']) . ']' . $post_type . '[/zrl]';
		
		$arr['body']          =  sprintf( $bodyverb, $alink, $ulink, $plink );
	
		$arr['verb']          = $activity;
		$arr['obj_type']      = $objtype;
		$arr['obj']           = json_encode($obj);
	
		$arr['allow_cid']     = $item['allow_cid'];
		$arr['allow_gid']     = $item['allow_gid'];
		$arr['deny_cid']      = $item['deny_cid'];
		$arr['deny_gid']      = $item['deny_gid'];
	
		$post = item_store($arr);	
		$post_id = $post['item_id'];
	
		$arr['id'] = $post_id;
	
		call_hooks('post_local_end', $arr);
	
		killme();	
	}
}