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] : '');
	$profiledata = array();

	// If there is only one parameter, then check if this parameter could be a guid
	if ($a->argc == 2) {
		$nick = "";
		$itemuid = 0;

		// Does the local user have this item?
		if (local_user()) {
			$r = q("SELECT `id`, `parent`, `author-name`, `author-link`, `author-avatar`, `network`, `body`, `uid` FROM `item`
				WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
					AND `guid` = '%s' AND `uid` = %d", dbesc($a->argv[1]), local_user());
			if (count($r)) {
				$nick = $a->user["nickname"];
				$itemuid = local_user();
			}
		}

		// Or is it anywhere on the server?
		if ($nick == "") {
			$r = q("SELECT `user`.`nickname`, `item`.`id`, `item`.`parent`, `item`.`author-name`,
				`item`.`author-link`, `item`.`author-avatar`, `item`.`network`, `item`.`uid`, `item`.`body`
				FROM `item` INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
				WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
					AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
					AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
					AND `item`.`private` = 0 AND NOT `user`.`hidewall`
					AND `item`.`guid` = '%s'", dbesc($a->argv[1]));
				//	AND `item`.`private` = 0 AND `item`.`wall` = 1
			if (count($r)) {
				$nick = $r[0]["nickname"];
				$itemuid = $r[0]["uid"];
			}
		}

		// Is it an item with uid=0?
		if ($nick == "") {
			$r = q("SELECT `item`.`id`, `item`.`parent`, `item`.`author-name`,
				`item`.`author-link`, `item`.`author-avatar`, `item`.`network`, `item`.`uid`, `item`.`body`
				FROM `item` WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
					AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
					AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
					AND `item`.`private` = 0 AND `item`.`uid` = 0
					AND `item`.`guid` = '%s'", dbesc($a->argv[1]));
				//	AND `item`.`private` = 0 AND `item`.`wall` = 1
		}
		if (count($r)) {
			if ($r[0]["id"] != $r[0]["parent"])
				$r = q("SELECT `id`, `author-name`, `author-link`, `author-avatar`, `network`, `body`, `uid` FROM `item`
					WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
						AND `id` = %d", $r[0]["parent"]);

			$profiledata = display_fetchauthor($a, $r[0]);

			if (strstr(normalise_link($profiledata["url"]), normalise_link($a->get_baseurl()))) {
				$nickname = str_replace(normalise_link($a->get_baseurl())."/profile/", "", normalise_link($profiledata["url"]));

				if (($nickname != $a->user["nickname"])) {
					$r = q("SELECT `profile`.`uid` AS `profile_uid`, `profile`.* , `contact`.`avatar-date` AS picdate, `user`.* FROM `profile`
						INNER JOIN `contact` on `contact`.`uid` = `profile`.`uid` INNER JOIN `user` ON `profile`.`uid` = `user`.`uid`
						WHERE `user`.`nickname` = '%s' AND `profile`.`is-default` = 1 and `contact`.`self` = 1 LIMIT 1",
						dbesc($nickname)
					);
					if (count($r))
						$profiledata = $r[0];

					$profiledata["network"] = NETWORK_DFRN;
				} else
					$profiledata = array();
			}
		} else {
			$a->error = 404;
			notice( t('Item not found.') . EOL);
			return;
		}
	}

	profile_load($a, $nick, 0, $profiledata);

}

function display_fetchauthor($a, $item) {

	$profiledata = array();
	$profiledata["uid"] = -1;
	$profiledata["nickname"] = $item["author-name"];
	$profiledata["name"] = $item["author-name"];
	$profiledata["picdate"] = "";
	$profiledata["photo"] = $item["author-avatar"];
	$profiledata["url"] = $item["author-link"];
	$profiledata["network"] = $item["network"];

	// Check for a repeated message
	$skip = false;
	$body = trim($item["body"]);

	// Skip if it isn't a pure repeated messages
	// Does it start with a share?
	if (!$skip AND strpos($body, "[share") > 0)
		$skip = true;

	// Does it end with a share?
	if (!$skip AND (strlen($body) > (strrpos($body, "[/share]") + 8)))
		$skip = true;

	if (!$skip) {
		$attributes = preg_replace("/\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism","$1",$body);
		// Skip if there is no shared message in there
		if ($body == $attributes)
			$skip = true;
	}

	if (!$skip) {
	        $author = "";
	        preg_match("/author='(.*?)'/ism", $attributes, $matches);
	        if ($matches[1] != "")
			$profiledata["name"] = html_entity_decode($matches[1],ENT_QUOTES,'UTF-8');

	        preg_match('/author="(.*?)"/ism', $attributes, $matches);
	        if ($matches[1] != "")
			$profiledata["name"] = html_entity_decode($matches[1],ENT_QUOTES,'UTF-8');

	        $profile = "";
	        preg_match("/profile='(.*?)'/ism", $attributes, $matches);
	        if ($matches[1] != "")
			$profiledata["url"] = $matches[1];

	        preg_match('/profile="(.*?)"/ism', $attributes, $matches);
	        if ($matches[1] != "")
			$profiledata["url"] = $matches[1];

	        $avatar = "";
	        preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
	        if ($matches[1] != "")
			$profiledata["photo"] = $matches[1];

		preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
		if ($matches[1] != "")
			$profiledata["photo"] = $matches[1];

		$profiledata["nickname"] = $profiledata["name"];
		$profiledata["network"] = GetProfileUsername($profiledata["url"], "", false, true);

		$profiledata["address"] = "";
		$profiledata["about"] = "";
	}

	// Don't show details from Diaspora contacts if you don't follow the contact
	$showdetails = ($profiledata["network"] != NETWORK_DIASPORA);

	// Fetching further contact data from the contact table
	$r = q("SELECT `uid`, `network`, `name`, `photo`, `nick`, `addr`, `location`, `about`, `gender`, `keywords`
		FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d AND `network` = '%s' AND `rel` IN (%d, %d)",
		dbesc(normalise_link($profiledata["url"])), intval(local_user()), dbesc($item["network"]),
		intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND));
	if (!count($r))
		$r = q("SELECT `uid`, `network`, `name`, `photo`, `nick`, `addr`, `location`, `about`, `gender`, `keywords`
			FROM `contact` WHERE `nurl` = '%s' AND `uid` = %d AND `rel` IN (%d, %d)",
			dbesc(normalise_link($profiledata["url"])), intval(local_user()),
			intval(CONTACT_IS_SHARING), intval(CONTACT_IS_FRIEND));

	if (count($r)) {
		$profiledata["name"] = $r[0]["name"];
		$profiledata["photo"] = $r[0]["photo"];
		$profiledata["nickname"] = $r[0]["nick"];
		$profiledata["addr"] = $r[0]["addr"];
		$profiledata["keywords"] = $r[0]["keywords"];
		$profiledata["network"] = $r[0]["network"];

		if (local_user() OR $showdetails) {
			$showdetails = true;
			$profiledata["address"] = $r[0]["location"];
			$profiledata["about"] = $r[0]["about"];
			$profiledata["gender"] = $r[0]["gender"];
		}
	}

	// Fetching profile data from global contacts
	if ($profiledata["network"] != NETWORK_FEED) {
		$r = q("SELECT `name`, `photo`, `nick`, `addr`, `location`, `about`, `gender`, `keywords`, `network` FROM `gcontact` WHERE `nurl` = '%s'", dbesc(normalise_link($profiledata["url"])));
		if (count($r)) {
			$profiledata["name"] = $r[0]["name"];
			$profiledata["photo"] = $r[0]["photo"];
			$profiledata["nickname"] = $r[0]["nick"];
			$profiledata["addr"] = $r[0]["addr"];
			$profiledata["network"] = $r[0]["network"];

			if ($r[0]["keywords"])
				$profiledata["keywords"] = $r[0]["keywords"];

			if ($showdetails) {
				if ($r[0]["location"])
					$profiledata["address"] = $r[0]["location"];

				if ($r[0]["about"])
					$profiledata["about"] = $r[0]["about"];

				if ($r[0]["gender"])
					$profiledata["gender"] = $r[0]["gender"];
			}
		}
	}

	if (local_user()) {
		if (in_array($profiledata["network"], array(NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS)))
			$profiledata["remoteconnect"] = $a->get_baseurl()."/follow?url=".urlencode($profiledata["url"]);
	} elseif ($profiledata["network"] == NETWORK_DFRN) {
		$connect = str_replace("/profile/", "/dfrn_request/", $profiledata["url"]);
		$profiledata["remoteconnect"] = $connect;
	}

	return($profiledata);
}

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/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 ($a->argc == 2) {
			$nick = "";

			if (local_user()) {
				$r = q("SELECT `id` FROM `item`
					WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
						AND `guid` = '%s' AND `uid` = %d", dbesc($a->argv[1]), local_user());
				if (count($r)) {
					$item_id = $r[0]["id"];
					$nick = $a->user["nickname"];
				}
			}

			if ($nick == "") {
				$r = q("SELECT `user`.`nickname`, `item`.`id` FROM `item` INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
					WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
						AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
						AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
						AND `item`.`private` = 0  AND NOT `user`.`hidewall`
						AND `item`.`guid` = '%s'", dbesc($a->argv[1]));
					//	AND `item`.`private` = 0 AND `item`.`wall` = 1
				if (count($r)) {
					$item_id = $r[0]["id"];
					$nick = $r[0]["nickname"];
				}
			}
			if ($nick == "") {
				$r = q("SELECT `item`.`id` FROM `item`
					WHERE `item`.`visible` = 1 AND `item`.`deleted` = 0 and `item`.`moderated` = 0
						AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
						AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
						AND `item`.`private` = 0  AND `item`.`uid` = 0
						AND `item`.`guid` = '%s'", dbesc($a->argv[1]));
					//	AND `item`.`private` = 0 AND `item`.`wall` = 1
				if (count($r)) {
					$item_id = $r[0]["id"];
				}
			}
		}
	}

	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;
	}

	// Why do we need this on the display page? We don't have the possibility to write new content here.
	// Ad editing of posts work without this as well.
	// We should remove this completely for the 3.5.1 release.
	/*
	if ($is_owner) {
		$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($a->user, true),
			'bang' => '',
			'visitor' => 'block',
			'profile_uid' => local_user(),
			'acl_data' => construct_acl_data($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);

	//	        AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE ( `id` = '%s' OR `uri` = '%s' ))

	if($update) {

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

		if(!$r)
			return '';
	}

	//	AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE ( `id` = '%s' OR `uri` = '%s' )

	$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` 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'];
			//	AND `item`.`parent` = ( SELECT `parent` FROM `item` FORCE INDEX (PRIMARY, `uri`) WHERE `uri` = '%s' AND uid = %d )

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