From c16f314ec348205f4741e0171335168720e652d2 Mon Sep 17 00:00:00 2001
From: Mike Macgirvin <mike@macgirvin.com>
Date: Mon, 25 Oct 2010 21:52:30 -0700
Subject: two-way subscriptions working with federated social accounts

---
 mod/follow.php | 200 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 200 insertions(+)
 create mode 100644 mod/follow.php

(limited to 'mod/follow.php')

diff --git a/mod/follow.php b/mod/follow.php
new file mode 100644
index 000000000..7ac9a50c3
--- /dev/null
+++ b/mod/follow.php
@@ -0,0 +1,200 @@
+<?php
+
+require_once('Scrape.php');
+
+function follow_post(&$a) {
+
+	if(! local_user()) {
+		notice( t('Permission denied.') . EOL);
+		goaway($_SESSION['return_url']);
+		// NOTREACHED
+	}
+
+	$url = notags(trim($_POST['url']));
+
+	if($url) {
+		$links = lrdd($url);
+		if(count($links)) {
+			foreach($links as $link) {
+				if($link['@attributes']['rel'] === NAMESPACE_DFRN)
+					$dfrn = $link['@attributes']['href'];
+				if($link['@attributes']['rel'] === 'salmon')
+					$notify = $link['@attributes']['href'];
+				if($link['@attributes']['rel'] === NAMESPACE_FEED)
+					$poll = $link['@attributes']['href'];
+				if($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
+					$hcard = $link['@attributes']['href'];
+				if($link['@attributes']['rel'] === 'http://webfinger.net/rel/profile-page')
+					$profile = $link['@attributes']['href'];
+
+			}
+		}
+	}	
+
+	// If we find a DFRN site, send our subscriber to the other person's
+	// dfrn_request page and all the other details will get sorted.
+
+	if(strlen($dfrn)) {
+		$ret = scrape_dfrn($dfrn);
+		if(is_array($ret) && x($ret,'dfrn-request')) {
+			if(strlen($a->path))
+				$myaddr = urlencode($a->get_baseurl() . '/profile/' . $a->user['nickname']);
+			else
+				$myaddr = urlencode($a->user['nickname'] . '@' . $a->get_hostname());
+ 
+			goaway($ret['dfrn-request'] . "&address=$myaddr");
+		
+			// NOTREACHED
+		}
+	}
+
+	if($hcard) {
+		$vcard = scrape_vcard($hcard);
+	}
+
+	if(! $profile)
+		$profile = $url;
+
+	// do we have enough information?
+
+	if(! x($vcard,'fn'))
+		if(x($vcard,'nick'))
+			$vcard['fn'] = $vcard['nick'];
+
+	if(! ((x($vcard['fn'])) && ($poll) && ($notify) && ($profile))) {
+		notice( t('The profile address specified does not provide adequate information.') . EOL);
+		goaway($_SESSION['return_url']);
+	} 
+
+	if(! x($vcard,'photo'))
+		$vcard['photo'] = $a->get_baseurl() . '/images/default-profile.jpg' ; 
+
+	// check if we already have a contact
+
+	$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `poll` = '%s' LIMIT 1",
+		intval(local_user()),
+		dbesc($poll)
+	);			
+	if($r) {
+		// update contact
+		if($r[0]['rel'] == REL_VIP) {
+			q("UPDATE `contact` SET `rel` = %d WHERE `id` = %d AND `uid` = %d LIMIT 1",
+				intval(REL_BUD),
+				intval($r[0]['id']),
+				intval(local_user())
+			);
+		}
+	}
+	else {
+		// create contact record 
+		$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `notify`, `poll`, `name`, `nick`, `photo`, `network`, `rel`, 
+			`blocked`, `readonly`, `pending` )
+			VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, 0, 0, 0 ) ",
+			intval(local_user()),
+			dbesc(datetime_convert()),
+			dbesc($profile),
+			dbesc($notify),
+			dbesc($poll),
+			dbesc($vcard['fn']),
+			dbesc($vcard['nick']),
+			dbesc($vcard['photo']),
+			dbesc('stat'),
+			intval(REL_FAN)
+		);
+	}
+	$r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
+		dbesc($profile),
+		intval(local_user())
+	);
+	if(! count($r)) {
+		notice( t('Unable to retrieve contact information.') . EOL);
+		goaway($_SESSION['return_url']);
+		// NOTREACHED
+	}
+
+	$contact = $r[0];
+	$contact_id  = $r[0]['id'];
+
+	require_once("Photo.php");
+
+	$photo_failure = false;
+
+	$filename = basename($vcard['photo']);
+	$img_str = fetch_url($vcard['photo'],true);
+	$img = new Photo($img_str);
+	if($img->is_valid()) {
+
+		$img->scaleImageSquare(175);
+					
+		$hash = photo_new_resource();
+
+		$r = $img->store(local_user(), $contact_id, $hash, $filename, t('Contact Photos'), 4 );
+
+		if($r === false)
+			$photo_failure = true;
+
+		$img->scaleImage(80);
+
+		$r = $img->store(local_user(), $contact_id, $hash, $filename, t('Contact Photos'), 5 );
+
+		if($r === false)
+			$photo_failure = true;
+
+		$photo = $a->get_baseurl() . '/photo/' . $hash . '-4.jpg';
+		$thumb = $a->get_baseurl() . '/photo/' . $hash . '-5.jpg';
+	}
+	else
+		$photo_failure = true;
+
+	if($photo_failure) {
+		$photo = $a->get_baseurl() . '/images/default-profile.jpg';
+		$thumb = $a->get_baseurl() . '/images/default-profile-sm.jpg';
+	}
+
+	$r = q("UPDATE `contact` SET `photo` = '%s', 
+			`thumb` = '%s', 
+			`name-date` = '%s', 
+			`uri-date` = '%s', 
+			`avatar-date` = '%s'
+			WHERE `id` = %d LIMIT 1
+		",
+			dbesc($photo),
+			dbesc($thumb),
+			dbesc(datetime_convert()),
+			dbesc(datetime_convert()),
+			dbesc(datetime_convert()),
+			intval($contact_id)
+		);			
+
+
+	// pull feed and consume it, which should subscribe to the hub.
+
+
+	// create a follow slap
+
+	$tpl = load_view_file('view/follow_slap.tpl');
+	$slap = replace_macros($tpl, array(
+		'$name' => $a->user['username'],
+		'$profile_page' => $a->get_baseurl() . '/profile/' . $a->user['nickname'],
+		'$photo' => $a->contact['photo'],
+		'$thumb' => $a->contact['thumb'],
+		'$published' => datetime_convert('UTC','UTC', 'now', ATOM_TIME),
+		'$item_id' => 'urn:X-dfrn:' . $a->get_hostname() . ':follow:' . random_string(),
+		'$title' => '',
+		'$type' => 'text',
+		'$content' => t('following'),
+		'$nick' => $a->user['nickname'],
+		'$verb' => ACTIVITY_FOLLOW
+	));
+
+	$r = q("SELECT `contact`.*, `user`.* FROM `contact` LEFT JOIN `user` ON `contact`.`uid` = `user`.`uid` 
+			WHERE `user`.`uid` = %d AND `contact`.`self` = 1 LIMIT 1",
+			intval(local_user())
+	);
+
+	require_once('include/salmon.php');
+	slapper($r[0],$contact,$slap);
+
+	goaway($_SESSION['return_url']);
+	// NOTREACHED
+}
-- 
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