From 771163e86056b92713577e55d0b5a3de7299cca4 Mon Sep 17 00:00:00 2001
From: Adam Magness <adam.magness@gmail.com>
Date: Sat, 13 Jan 2018 09:36:21 -0500
Subject: [PATCH] Move auto_redir function

move function into dfrn, rename and update a db insert
---
 src/Protocol/DFRN.php | 91 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)

diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 509d05e6c6..094c37717a 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -8,6 +8,7 @@
  */
 namespace Friendica\Protocol;
 
+use Friendica\App;
 use Friendica\Content\OEmbed;
 use Friendica\Core\Config;
 use Friendica\Core\System;
@@ -3080,4 +3081,94 @@ class DFRN
 		logger("Import done for user " . $importer["uid"] . " from contact " . $importer["id"], LOGGER_DEBUG);
 		return 200;
 	}
+
+	/**
+	 * @param App    $a            App
+	 * @param string $contact_nick contact nickname
+	 */
+	public static function autoRedir(App $a, $contact_nick)
+	{
+		// prevent looping
+		if (x($_REQUEST, 'redir') && intval($_REQUEST['redir'])) {
+			return;
+		}
+
+		if ((! $contact_nick) || ($contact_nick === $a->user['nickname'])) {
+			return;
+		}
+
+		if (local_user()) {
+			// We need to find out if $contact_nick is a user on this hub, and if so, if I
+			// am a contact of that user. However, that user may have other contacts with the
+			// same nickname as me on other hubs or other networks. Exclude these by requiring
+			// that the contact have a local URL. I will be the only person with my nickname at
+			// this URL, so if a result is found, then I am a contact of the $contact_nick user.
+			//
+			// We also have to make sure that I'm a legitimate contact--I'm not blocked or pending.
+
+			$baseurl = System::baseUrl();
+			$domain_st = strpos($baseurl, "://");
+			if ($domain_st === false) {
+				return;
+			}
+			$baseurl = substr($baseurl, $domain_st + 3);
+			$nurl = normalise_link($baseurl);
+
+			/// @todo Why is there a query for "url" *and* "nurl"? Especially this normalising is strange.
+			$r = q("SELECT `id` FROM `contact` WHERE `uid` = (SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1)
+					AND `nick` = '%s' AND NOT `self` AND (`url` LIKE '%%%s%%' OR `nurl` LIKE '%%%s%%') AND NOT `blocked` AND NOT `pending` LIMIT 1",
+				dbesc($contact_nick),
+				dbesc($a->user['nickname']),
+				dbesc($baseurl),
+				dbesc($nurl)
+			);
+			if ((! DBM::is_result($r)) || $r[0]['id'] == remote_user()) {
+				return;
+			}
+
+			$r = q("SELECT * FROM contact WHERE nick = '%s'
+					AND network = '%s' AND uid = %d  AND url LIKE '%%%s%%' LIMIT 1",
+				dbesc($contact_nick),
+				dbesc(NETWORK_DFRN),
+				intval(local_user()),
+				dbesc($baseurl)
+			);
+			if (! DBM::is_result($r)) {
+				return;
+			}
+
+			$cid = $r[0]['id'];
+
+			$dfrn_id = (($r[0]['issued-id']) ? $r[0]['issued-id'] : $r[0]['dfrn-id']);
+
+			if ($r[0]['duplex'] && $r[0]['issued-id']) {
+				$orig_id = $r[0]['issued-id'];
+				$dfrn_id = '1:' . $orig_id;
+			}
+			if ($r[0]['duplex'] && $r[0]['dfrn-id']) {
+				$orig_id = $r[0]['dfrn-id'];
+				$dfrn_id = '0:' . $orig_id;
+			}
+
+			// ensure that we've got a valid ID. There may be some edge cases with forums and non-duplex mode
+			// that may have triggered some of the "went to {profile/intro} and got an RSS feed" issues
+
+			if (strlen($dfrn_id) < 3) {
+				return;
+			}
+
+			$sec = random_string();
+
+			dba::insert('profile_check', ['uid' => local_user(), 'cid' => $cid, 'dfrn_id' => $dfrn_id, 'sec' => $sec, 'expire' => time() + 45]);
+
+			$url = curPageURL();
+
+			logger('auto_redir: ' . $r[0]['name'] . ' ' . $sec, LOGGER_DEBUG);
+			$dest = (($url) ? '&destination_url=' . $url : '');
+			goaway($r[0]['poll'] . '?dfrn_id=' . $dfrn_id
+				. '&dfrn_version=' . DFRN_PROTOCOL_VERSION . '&type=profile&sec=' . $sec . $dest);
+		}
+
+		return;
+	}
 }