core/Zotlabs/Module/Subthread.php

<?php
namespace Zotlabs\Module;

use Zotlabs\Lib\Activity;


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



class Subthread extends \Zotlabs\Web\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 = 'Follow';
		elseif(argv(1) === 'unsub')
			$activity = 'Ignore';


		$i = q("select * from item where id = %d and uid = %d",
			intval($item_id),
			intval(local_channel())
		);

		if(! $i) {
			$i = q("select * from item where id = %d and uid = %d",
				intval($item_id),
				intval($sys['channel_id'])
			);

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

		if(! $i) {
			return;
		}

		$r = q("SELECT parent FROM item WHERE id = %d",
			intval($item_id)
		);

		if($r) {
			$r = q("select * from item where id = parent and id = %d limit 1",
				dbesc($r[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 = item_message_id();
		$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') ? 'Image' : 'Note');

		$body = $item['body'];

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

		if(! intval($item['item_thread_top']))
			$post_type = 'comment';

		if($activity === 'Follow')
			$bodyverb = t('%1$s is following %2$s\'s %3$s');
		if($activity === 'Ignore')
			$bodyverb = t('%1$s stopped following %2$s\'s %3$s');

		$arr = array();

		$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/' . $item['uuid'] . ']' . $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, deliver: false, addAndSync: false);
		$post_id = $post['item_id'];

		$arr['id'] = $post_id;

		call_hooks('post_local_end', $arr);

		killme();


	}




}