From 5be98e3ec8b0475dc67504967cac695d9e4a129a Mon Sep 17 00:00:00 2001
From: Friendika <info@friendika.com>
Date: Sun, 23 Jan 2011 20:09:34 -0800
Subject: [PATCH] following random feeds

---
 include/Scrape.php | 30 ++++++++++++++++++++++++++
 include/poller.php | 10 ++++++++-
 mod/follow.php     | 54 ++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 91 insertions(+), 3 deletions(-)

diff --git a/include/Scrape.php b/include/Scrape.php
index 10ec54d13..8478ea407 100644
--- a/include/Scrape.php
+++ b/include/Scrape.php
@@ -22,6 +22,8 @@ function scrape_dfrn($url) {
 
 	foreach($items as $item) {
 		$x = $item->getAttribute('rel');
+		if(($x === 'alternate') && ($item->getAttribute('type') === 'application/atom+xml'))
+			$ret['feed_atom'] = $item->getAttribute('href');
 		if(substr($x,0,5) == "dfrn-")
 			$ret[$x] = $item->getAttribute('href');
 		if($x === 'lrdd') {
@@ -135,3 +137,31 @@ function scrape_vcard($url) {
 
 	return $ret;
 }}
+
+
+if(! function_exists('scrape_feed')) {
+function scrape_feed($url) {
+
+	$ret = array();
+	$s = fetch_url($url);
+
+	if(! $s) 
+		return $ret;
+
+	$dom = HTML5_Parser::parse($s);
+
+	if(! $dom)
+		return $ret;
+
+	$items = $dom->getElementsByTagName('link');
+
+	// get Atom link elements
+
+	foreach($items as $item) {
+		$x = $item->getAttribute('rel');
+		if(($x === 'alternate') && ($item->getAttribute('type') === 'application/atom+xml'))
+			$ret['feed_atom'] = $item->getAttribute('href');
+	}
+
+	return $ret;
+}}
\ No newline at end of file
diff --git a/include/poller.php b/include/poller.php
index 8234becbb..024b9fbcd 100644
--- a/include/poller.php
+++ b/include/poller.php
@@ -32,10 +32,18 @@
 	if(($argc > 1) && ($argv[1] == 'force'))
 		$force = true;
 
+	if(($argc > 1) && intval($argv[1])) {
+		$manual_id = intval($argv[1]);
+		$force = true;
+	}
+
+	$sql_extra = (($manual_id) ? " AND `id` = $manual_id " : "");
+
 	// 'stat' clause is a temporary measure until we have federation subscriptions working both directions
 	$contacts = q("SELECT * FROM `contact` 
 		WHERE ( ( `network` = 'dfrn' AND ( `dfrn-id` != '' OR (`issued-id` != '' AND `duplex` = 1)))
-		OR ( `network` IN ( 'stat', 'feed' ) AND `poll` != '' )) 
+		OR ( `network` IN ( 'stat', 'feed' ) AND `poll` != '' ))
+		$sql_extra 
 		AND `self` = 0 AND `blocked` = 0 AND `readonly` = 0 ORDER BY RAND()");
 
 	if(! count($contacts))
diff --git a/mod/follow.php b/mod/follow.php
index 14bdb9fc6..e5eb7763b 100644
--- a/mod/follow.php
+++ b/mod/follow.php
@@ -48,6 +48,8 @@ function follow_post(&$a) {
 		}
 	}
 
+	$network = 'stat';
+
 	if($hcard) {
 		$vcard = scrape_vcard($hcard);
 
@@ -63,13 +65,58 @@ function follow_post(&$a) {
 	if(! $profile)
 		$profile = $url;
 
-	// do we have enough information?
 
 	if(! x($vcard,'fn'))
 		if(x($vcard,'nick'))
 			$vcard['fn'] = $vcard['nick'];
 
+	if((! isset($vcard)) && (! $poll)) {
+
+		$ret = scrape_feed($url);
+
+		if(count($ret) && $ret['feed_atom']) {
+			$poll = $ret['feed_atom'];
+			$vcard = array();
+			require_once('simplepie/simplepie.inc');
+		    $feed = new SimplePie();
+			$xml = fetch_url($poll);
+
+    		$feed->set_raw_data($xml);
+
+		    $feed->init();
+
+			$vcard['photo'] = $feed->get_image_url();
+			$author = $feed->get_author();
+			if($author) {			
+				$vcard['fn'] = trim($author->get_name());
+				$vcard['nick'] = strtolower($vcard['fn']);
+				if(strpos($vcard['nick'],' '))
+					$vcard['nick'] = trim(substr($vcard['nick'],0,strpos($vcard['nick'],' ')));
+				$email = $author->get_email();
+			}
+			else {
+				$item = $feed->get_item(0);
+				if($item) {
+					$author = $item->get_author();
+					if($author) {			
+						$vcard['fn'] = trim($author->get_name());
+						$vcard['nick'] = strtolower($vcard['fn']);
+						if(strpos($vcard['nick'],' '))
+							$vcard['nick'] = trim(substr($vcard['nick'],0,strpos($vcard['nick'],' ')));
+						$email = $author->get_email();
+					}
+				}
+			}
+			if((! $vcard['photo']) && strlen($email))
+				$vcard['photo'] = gravatar_img($email);
+			$network = 'feed';
+        }
+	}
+
 	logger('follow: poll=' . $poll . ' notify=' . $notify . ' profile=' . $profile . ' vcard=' . print_r($vcard,true));
+
+
+	// do we have enough information?
 	
 	if(! ((x($vcard['fn'])) && ($poll) && ($profile))) {
 		notice( t('The profile address specified does not provide adequate information.') . EOL);
@@ -115,7 +162,7 @@ function follow_post(&$a) {
 			dbesc($vcard['fn']),
 			dbesc($vcard['nick']),
 			dbesc($vcard['photo']),
-			dbesc('stat'),
+			dbesc($network),
 			intval(REL_FAN)
 		);
 	}
@@ -158,6 +205,9 @@ function follow_post(&$a) {
 
 	// pull feed and consume it, which should subscribe to the hub.
 
+	$php_path = ((x($a->config,'php_path') && strlen($a->config['php_path'])) ? $a->config['php_path'] : 'php');
+	proc_close(proc_open("\"$php_path\" \"include/poller.php\" \"$contact_id\" &", array(), $foo));
+
 
 	// create a follow slap