friendica/mod/display.php

<?php


function display_init(&$a) {

	if((get_config('system','block_public')) && (! local_user()) && (! remote_user())) {
		return;
	}

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

}


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

	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');
	require_once('include/acl_selectors.php');


	$o = '';

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


	if($update) {
		$nick = $_REQUEST['nick'];
	}
	else {
		$nick = (($a->argc > 1) ? $a->argv[1] : '');
	}

	if($update) {
		$item_id = $_REQUEST['item_id'];
		$a->profile = array('uid' => intval($update), 'profile_uid' => intval($update));
	}
	else {
		$item_id = (($a->argc > 2) ? $a->argv[2] : 0);
	}

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

	$groups = array();

	$contact = null;
	$remote_contact = false;

	$contact_id = 0;

	if(is_array($_SESSION['remote'])) {
		foreach($_SESSION['remote'] as $v) {
			if($v['uid'] == $a->profile['uid']) {
				$contact_id = $v['cid'];
				break;
			}
		}
	}

	if($contact_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];

	$is_owner = ((local_user()) && (local_user() == $a->profile['profile_uid']) ? true : false);

	if($a->profile['hidewall'] && (! $is_owner) && (! $remote_contact)) {
		notice( t('Access to this profile has been restricted.') . EOL);
		return;
	}

	if ($is_owner) {
		$celeb = ((($a->user['page-flags'] == PAGE_SOAPBOX) || ($a->user['page-flags'] == PAGE_COMMUNITY)) ? true : false);

		$x = array(
			'is_owner' => true,
			'allow_location' => $a->user['allow_location'],
			'default_location' => $a->user['default-location'],
			'nickname' => $a->user['nickname'],
			'lockstate' => ( (is_array($a->user)) && ((strlen($a->user['allow_cid'])) || (strlen($a->user['allow_gid'])) || (strlen($a->user['deny_cid'])) || (strlen($a->user['deny_gid']))) ? 'lock' : 'unlock'),
			'acl' => populate_acl($a->user, $celeb),
			'bang' => '',
			'visitor' => 'block',
			'profile_uid' => local_user(),
			'acl_data' => construct_acl_data($a, $a->user), // For non-Javascript ACL selector
		);
		$o .= status_editor($a,$x,0,true);
	}

	$sql_extra = item_permissions_sql($a->profile['uid'],$remote_contact,$groups);

	if($update) {

		$r = q("SELECT id FROM item WHERE item.uid = %d
		        AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE ( `id` = '%s' OR `uri` = '%s' ))
		        $sql_extra AND unseen = 1",
		        intval($a->profile['uid']),
		        dbesc($item_id),
		        dbesc($item_id) 
		);

		if(!$r)
			return '';
	}

	$r = q("SELECT `item`.*, `item`.`id` AS `item_id`,  `item`.`network` AS `item_network`,
		`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` INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
		AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
		WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND `item`.`deleted` = 0
		and `item`.`moderated` = 0
		AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE ( `id` = '%s' OR `uri` = '%s' )
		AND uid = %d )
		$sql_extra
		ORDER BY `parent` DESC, `gravity` ASC, `id` ASC ",
		intval($a->profile['uid']),
		dbesc($item_id),
		dbesc($item_id),
		intval($a->profile['uid'])
	);

	if(!$r && local_user()) {
		// Check if this is another person's link to a post that we have
		$r = q("SELECT `item`.uri FROM `item`
			WHERE (`item`.`id` = '%s' OR `item`.`uri` = '%s' )
			LIMIT 1",
			dbesc($item_id),
			dbesc($item_id)
		);
		if($r) {
			$item_uri = $r[0]['uri'];

			$r = q("SELECT `item`.*, `item`.`id` AS `item_id`,  `item`.`network` AS `item_network`,
				`contact`.`name`, `contact`.`photo`, `contact`.`url`, `contact`.`rel`,
				`contact`.`network`, `contact`.`thumb`, `contact`.`self`, `contact`.`writable`, 
				`contact`.`id` AS `cid`, `contact`.`uid` AS `contact-uid`
				FROM `item` INNER JOIN `contact` ON `contact`.`id` = `item`.`contact-id`
				AND `contact`.`blocked` = 0 AND `contact`.`pending` = 0
				WHERE `item`.`uid` = %d AND `item`.`visible` = 1 AND `item`.`deleted` = 0
				and `item`.`moderated` = 0
				AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE `uri` = '%s' AND uid = %d )
				ORDER BY `parent` DESC, `gravity` ASC, `id` ASC ",
				intval(local_user()),
				dbesc($item_uri),
				intval(local_user())
			);
		}
	}


	if($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'])
			);
		}

		$items = conv_sort($r,"`commented`");

		if(!$update)
			$o .= "<script> var netargs = '?f=&nick=" . $nick . "&item_id=" . $item_id . "'; </script>";
		$o .= conversation($a,$items,'display', $update);

		// Preparing the meta header
		require_once('include/bbcode.php');
		require_once("include/html2plain.php");
		$description = trim(html2plain(bbcode($r[0]["body"], false, false), 0, true));
		$title = trim(html2plain(bbcode($r[0]["title"], false, false), 0, true));
		$author_name = $r[0]["author-name"];

		$image = "";
		if ($image == "")
			$image = $r[0]["thumb"];

		if ($title == "")
			$title = $author_name;

		$description = htmlspecialchars($description, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
		$title = htmlspecialchars($title, ENT_COMPAT, 'UTF-8', true); // allow double encoding here
		$author_name = htmlspecialchars($author_name, ENT_COMPAT, 'UTF-8', true); // allow double encoding here

		//<meta name="keywords" content="">
		$a->page['htmlhead'] .= '<meta name="author" content="'.$author_name.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="title" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="fulltitle" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="description" content="'.$description.'" />'."\n";

		// Schema.org microdata
		$a->page['htmlhead'] .= '<meta itemprop="name" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta itemprop="description" content="'.$description.'" />'."\n";
		$a->page['htmlhead'] .= '<meta itemprop="image" content="'.$image.'" />'."\n";
		$a->page['htmlhead'] .= '<meta itemprop="author" content="'.$author_name.'" />'."\n";

		// Twitter cards
		$a->page['htmlhead'] .= '<meta name="twitter:card" content="summary" />'."\n";
		$a->page['htmlhead'] .= '<meta name="twitter:title" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="twitter:description" content="'.$description.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="twitter:image" content="'.$image.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="twitter:url" content="'.$r[0]["plink"].'" />'."\n";

		// Dublin Core
		$a->page['htmlhead'] .= '<meta name="DC.title" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="DC.description" content="'.$description.'" />'."\n";

		// Open Graph
		$a->page['htmlhead'] .= '<meta property="og:type" content="website" />'."\n";
		$a->page['htmlhead'] .= '<meta property="og:title" content="'.$title.'" />'."\n";
		$a->page['htmlhead'] .= '<meta property="og:image" content="'.$image.'" />'."\n";
		$a->page['htmlhead'] .= '<meta property="og:url" content="'.$r[0]["plink"].'" />'."\n";
		$a->page['htmlhead'] .= '<meta property="og:description" content="'.$description.'" />'."\n";
		$a->page['htmlhead'] .= '<meta name="og:article:author" content="'.$author_name.'" />'."\n";
		// article:tag

		return $o;
	}

	$r = q("SELECT `id`,`deleted` FROM `item` WHERE `id` = '%s' OR `uri` = '%s' LIMIT 1",
		dbesc($item_id),
		dbesc($item_id)
	);
	if($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 );
	}

	return $o;
}