<?php


function display_content(&$a, $update = 0, $load = false) {

//	logger("mod-display: update = $update load = $load");

	if($load)
		$_SESSION['loadtime'] = datetime_convert();


	if(intval(get_config('system','block_public')) && (! local_channel()) && (! remote_channel())) {
		notice( t('Public access denied.') . EOL);
		return;
	}

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


	$a->page['htmlhead'] .= replace_macros(get_markup_template('display-head.tpl'), array());

	if(argc() > 1 && argv(1) !== 'load')
		$item_hash = argv(1);


	if($_REQUEST['mid'])
		$item_hash = $_REQUEST['mid'];


	if(! $item_hash) {
		$a->error = 404;
		notice( t('Item not found.') . EOL);
		return;
	}

	$observer_is_owner = false;


	if(local_channel() && (! $update)) {

		$channel = $a->get_channel();


		$channel_acl = array(
			'allow_cid' => $channel['channel_allow_cid'], 
			'allow_gid' => $channel['channel_allow_gid'], 
			'deny_cid' => $channel['channel_deny_cid'], 
			'deny_gid' => $channel['channel_deny_gid']
		); 


		$x = array(
			'is_owner' => true,
			'allow_location' => ((intval(get_pconfig($channel['channel_id'],'system','use_browser_location'))) ? '1' : ''),
			'default_location' => $channel['channel_location'],
			'nickname' => $channel['channel_address'],
			'lockstate' => (($group || $cid || $channel['channel_allow_cid'] || $channel['channel_allow_gid'] || $channel['channel_deny_cid'] || $channel['channel_deny_gid']) ? 'lock' : 'unlock'),

			'acl' => populate_acl($channel_acl),
			'bang' => '',
			'visitor' => true,
			'profile_uid' => local_channel(),
			'return_path' => 'channel/' . $channel['channel_address'],
			'expanded' => true
		);

		$o = '<div id="jot-popup">';
		$o .= status_editor($a,$x);
		$o .= '</div>';

	}

	// This page can be viewed by anybody so the query could be complicated
	// First we'll see if there is a copy of the item which is owned by us - if we're logged in locally.
	// If that fails (or we aren't logged in locally), 
	// query an item in which the observer (if logged in remotely) has cid or gid rights
	// and if that fails, look for a copy of the post that has no privacy restrictions.  
	// If we find the post, but we don't find a copy that we're allowed to look at, this fact needs to be reported.

	// find a copy of the item somewhere

	$target_item = null;

	$r = q("select id, uid, mid, parent_mid, item_type, item_deleted from item where mid like '%s' limit 1",
		dbesc($item_hash . '%')
	);

	if($r) {
		$target_item = $r[0];
	}

	$r = null;

	if($target_item['item_type']  == ITEM_TYPE_WEBPAGE) {
		$x = q("select * from channel where channel_id = %d limit 1",
			intval($target_item['uid'])
		);
		$y = q("select * from item_id where uid = %d and service = 'WEBPAGE' and iid = %d limit 1",
			intval($target_item['uid']),
			intval($target_item['id'])
		);
		if($x && $y) {
			goaway(z_root() . '/page/' . $x[0]['channel_address'] . '/' . $y[0]['sid']);
		}
		else {
			notice( t('Page not found.') . EOL);
		 	return '';
		}
	}


	$simple_update = (($update) ? " AND item_unseen = 1 " : '');
		
	if($update && $_SESSION['loadtime'])
		$simple_update .= " and item.changed > '" . datetime_convert('UTC','UTC',$_SESSION['loadtime']) . "' ";
	if($load)
		$simple_update = '';



	if((! $update) && (! $load)) {


		$o .= '<div id="live-display"></div>' . "\r\n";
		$o .= "<script> var profile_uid = " . ((intval(local_channel())) ? local_channel() : (-1))
			. "; var netargs = '?f='; var profile_page = " . $a->pager['page'] . "; </script>\r\n";

		$a->page['htmlhead'] .= replace_macros(get_markup_template("build_query.tpl"),array(
			'$baseurl' => z_root(),
			'$pgtype' => 'display',
			'$uid' => '0',
			'$gid' => '0',
			'$cid' => '0',
			'$cmin' => '0',
			'$cmax' => '99',
			'$star' => '0',
			'$liked' => '0',
			'$conv' => '0',
			'$spam' => '0',
			'$fh' => '0',
			'$nouveau' => '0',
			'$wall' => '0',
			'$page' => (($a->pager['page'] != 1) ? $a->pager['page'] : 1),
			'$list' => ((x($_REQUEST,'list')) ? intval($_REQUEST['list']) : 0),
			'$search' => '',
			'$order' => '',
			'$file' => '',
			'$cats' => '',
			'$tags' => '',
			'$dend' => '',
			'$dbegin' => '',
			'$verb' => '',
			'$mid' => $item_hash
		));


	}

	$observer_hash = get_observer_hash();
	$item_normal = item_normal();

	$sql_extra = public_permissions_sql($observer_hash);

	if(($update && $load) || ($_COOKIE['jsAvailable'] != 1)) {

		$updateable = false;

		$pager_sql = sprintf(" LIMIT %d OFFSET %d ", intval($a->pager['itemspage']),intval($a->pager['start']));

		if($load || ($_COOKIE['jsAvailable'] != 1)) {
			$r = null;

			require_once('include/identity.php');
			$sys = get_sys_channel();
			$sysid = $sys['channel_id'];

			if(local_channel()) {
				$r = q("SELECT * from item
					WHERE uid = %d
					and mid = '%s'
					$item_normal
					limit 1",
					intval(local_channel()),
					dbesc($target_item['parent_mid'])
				);
				if($r) {
					$updateable = true;

				}

			}
			if($r === null) {

				// in case somebody turned off public access to sys channel content using permissions
				// make that content unsearchable by ensuring the owner_xchan can't match

				if(! perm_is_allowed($sysid,$observer_hash,'view_stream'))
					$sysid = 0;


				$r = q("SELECT * from item
					WHERE mid = '%s'
					AND (((( `item`.`allow_cid` = ''  AND `item`.`allow_gid` = '' AND `item`.`deny_cid`  = '' 
					AND `item`.`deny_gid`  = '' AND item_private = 0 ) 
					and owner_xchan in ( " . stream_perms_xchans(($observer_hash) ? (PERMS_NETWORK|PERMS_PUBLIC) : PERMS_PUBLIC) . " ))
					OR uid = %d )
					$sql_extra )
					$item_normal
					limit 1",
					dbesc($target_item['parent_mid']),
					intval($sysid)
				);

			}
		}
		else {
			$r = array();
		}
	}

	if($r) {

		$parents_str = ids_to_querystr($r,'id');
		if($parents_str) {

			$items = q("SELECT `item`.*, `item`.`id` AS `item_id` 
				FROM `item`
				WHERE parent in ( %s ) $item_normal ",
				dbesc($parents_str)
			);

			xchan_query($items);
			$items = fetch_post_tags($items,true);
			$items = conv_sort($items,'created');
		}
	} else {
		$items = array();
	}


	if ($_COOKIE['jsAvailable'] == 1) {
		$o .= conversation($a, $items, 'display', $update, 'client');
	} else {
		$o .= conversation($a, $items, 'display', $update, 'traditional');
		if ($items[0]['title'])
			$a->page['title'] = $items[0]['title'] . " - " . $a->page['title'];

	}

	if($updateable) {
		$x = q("UPDATE item SET item_unseen = 0 where item_unseen = 1 AND uid = %d and parent = %d ",
			intval(local_channel()),
			intval($r[0]['parent'])
		);
	}

	$o .= '<div id="content-complete"></div>';

	return $o;


/*
	elseif((! $update) && (!  {
		
		$r = q("SELECT `id`, item_flags FROM `item` WHERE `id` = '%s' OR `mid` = '%s' LIMIT 1",
			dbesc($item_hash),
			dbesc($item_hash)
		);
		if($r) {
			if(intval($r[0]['item_deleted'])) {
				notice( t('Item has been removed.') . EOL );
			}
			else {	
				notice( t('Permission denied.') . EOL ); 
			}
		}
		else {
			notice( t('Item not found.') . EOL );
		}

	}
*/
	return $o;
}

