friendica/mod/display.php

<?php


function display_content(&$a) {

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

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


	$o = '<div id="live-display"></div>' . "\r\n";

	$nick = (($a->argc > 1) ? $a->argv[1] : '');
	profile_load($a,$nick);

	$item_id = (($a->argc > 2) ? intval($a->argv[2]) : 0);

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



	$groups = array();

	$contact = null;
	$remote_contact = false;

	if(remote_user()) {
		$contact_id = $_SESSION['visitor_id'];
		$groups = init_groups_visitor($contact_id);
		$r = q("SELECT * FROM `contact` WHERE `id` = %d AND `uid` = %d LIMIT 1",
			intval($contact_id),
			intval($a->profile['uid'])
		);
		if(count($r)) {
			$contact = $r[0];
			$remote_contact = true;
		}
	}

	if(! $remote_contact) {
		if(local_user()) {
			$contact_id = $_SESSION['cid'];
			$contact = $a->contact;
		}
	}

	$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `self` = 1 LIMIT 1",
		intval($a->profile['uid'])
	);
	if(count($r))
		$a->page_contact = $r[0];

	$sql_extra = "
		AND `allow_cid` = '' 
		AND `allow_gid` = '' 
		AND `deny_cid`  = '' 
		AND `deny_gid`  = '' 
	";


	// Profile owner - everything is visible

	if(local_user() && (local_user() == $a->profile['uid'])) {
		$sql_extra = ''; 		
	}

	// authenticated visitor - here lie dragons
	// If $remotecontact is true, we know that not only is this a remotely authenticated
	// person, but that it is *our* contact, which is important in multi-user mode.

	elseif($remote_contact) {
		$gs = '<<>>'; // should be impossible to match
		if(count($groups)) {
			foreach($groups as $g)
				$gs .= '|<' . intval($g) . '>';
		} 
		$sql_extra = sprintf(
			" AND ( `allow_cid` = '' OR `allow_cid` REGEXP '<%d>' ) 
			  AND ( `deny_cid`  = '' OR  NOT `deny_cid` REGEXP '<%d>' ) 
			  AND ( `allow_gid` = '' OR `allow_gid` REGEXP '%s' )
			  AND ( `deny_gid`  = '' OR  NOT `deny_gid` REGEXP '%s') ",

			intval($_SESSION['visitor_id']),
			intval($_SESSION['visitor_id']),
			dbesc($gs),
			dbesc($gs)
		);
	}

	$r = q("SELECT `item`.*, `item`.`id` AS `item_id`, 
		`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
		`contact`.`network`, `contact`.`thumb`, `contact`.`self`, `contact`.`writable`, 
		`contact`.`id` AS `cid`, `contact`.`uid` AS `contact-uid`
		FROM `item` LEFT JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
		WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND `item`.`deleted` = 0
		AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
		AND `item`.`parent` = ( SELECT `parent` FROM `item` WHERE ( `id` = '%s' OR `uri` = '%s' ))
		$sql_extra
		ORDER BY `parent` DESC, `gravity` ASC, `id` ASC ",
		intval($a->profile['uid']),
		dbesc($item_id),
		dbesc($item_id)
	);


	if(count($r)) {

		if((local_user()) && (local_user() == $a->profile['uid'])) {
			q("UPDATE `item` SET `unseen` = 0 
				WHERE `parent` = %d AND `unseen` = 1",
				intval($r[0]['parent'])
			);
		}


		$o .= conversation($a,$r,'display', false);

	}
	else {
		$r = q("SELECT `id` FROM `item` WHERE `id` = '%s' OR `uri` = '%s' LIMIT 1",
			dbesc($item_id),
			dbesc($item_id)
		);
		if(count($r)) {
			if($r[0]['deleted']) {
				notice( t('Item has been removed.') . EOL );
			}
			else {	
				notice( t('Permission denied.') . EOL ); 
			}
		}
		else {
			notice( t('Item not found.') . EOL );
		}

	}

	$o .= '<div class="cc-license">' . t('Shared content is covered by the <a href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution 3.0</a> license.') . '</div>';

	return $o;
}