premium/restricted channel connections implemented, configure at yoursite/channel/nickname - this basically redirects "follow" requests to a premium channel's sell page if it has one configured. You can still click through and create a connection request (introduction), but this provides a means for the channel owner to state their terms. If you don't abide by the terms, you will likely be blocked or the channel deleted. This facility is extensible in a number of ways.

boot.php

@@ -1623,13 +1623,20 @@ function profile_sidebar($profile, $block = 0, $show_connect = true) {
 
 	require_once('include/Contact.php');
 
+	if($show_connect) {
 
-	$connect_url = (($show_connect) ? rconnect_url($profile['uid'],get_observer_hash()) : '');
-	
-	$connect = (($connect_url) ? t('Connect') : '');
+		// This will return an empty string if we're already connected.
 
-	if($connect_url) 
-		$connect_url = $connect_url . '/follow?f=1&url=' . urlencode($profile['channel_address'] . '@' . $a->get_hostname());
+		$connect_url = rconnect_url($profile['uid'],get_observer_hash());
+		$connect = (($connect_url) ? t('Connect') : '');
+		if($connect_url) 
+			$connect_url = sprintf($connect_url,urlencode($profile['channel_address'] . '@' . $a->get_hostname()));
+
+		// premium channel - over-ride
+
+		if($profile['channel_pageflags'] & PAGE_PREMIUM)
+			$connect_url = z_root() . '/connect/' . $profile['channel_address'];
+	}
 
 	// show edit profile to yourself
 	if($is_owner) {

include/Contact.php

@@ -15,13 +15,20 @@ function rconnect_url($channel_id,$xchan) {
 	if($r)
 		return '';
 
+	$r = q("select * from xchan where xchan_hash = '%s' limit 1",
+		dbesc($xchan)
+	);
+
+	if(($r) && ($r[0]['xchan_follow']))
+		return $r[0]['xchan_follow'];
+
 	$r = q("select hubloc_url from hubloc where hubloc_hash = '%s' and ( hubloc_flags & %d ) limit 1",
 		dbesc($xchan),
 		intval(HUBLOC_FLAGS_PRIMARY)
 	);
 
 	if($r)
-		return $r[0]['hubloc_url'];
+		return $r[0]['hubloc_url'] . '/follow?f=&url=%s';
 	return '';
 
 }

include/follow.php

@@ -11,7 +11,7 @@
 
 require_once('include/zot.php');
 
-function new_contact($uid,$url,$channel,$interactive = false) {
+function new_contact($uid,$url,$channel,$interactive = false, $confirm = false) {
 
 	$result = array('success' => false,'message' => '');
 
@@ -60,6 +60,11 @@ function new_contact($uid,$url,$channel,$interactive = false) {
 		return $result;
 	}
 
+	// Premium channel, set confirm before callback to avoid recursion
+
+	if(array_key_exists('connect_url',$j) && (! $confirm))
+		goaway($j['connect_url']);
+
 
 	// check service class limits
 

mod/connect.php

@@ -31,12 +31,13 @@ function connect_post(&$a) {
 		
 		$channel = $a->get_channel();
 		if(($channel['channel_pageflags'] & PAGE_PREMIUM) != $premium)
-			$r = q("update channel set channel_flags = channel_flags ^ %d where channel_id = %d limit 1",
+			$r = q("update channel set channel_pageflags = channel_pageflags ^ %d where channel_id = %d limit 1",
 				intval(PAGE_PREMIUM),
 				intval(local_user()) 
 			);
 		set_pconfig($a->profile['profile_uid'],'system','selltext',$text);
-		return;
+		goaway(z_root() . '/' . $a->query_string);
+
 	}
 
 	$url = '';
@@ -53,7 +54,7 @@ function connect_post(&$a) {
 		}
 	}
 	if($url)
-		goaway($url);
+		goaway($url . '&confirm=1');
 	else
 		notice('Unable to connect to your home hub location.');
 
@@ -68,20 +69,34 @@ function connect_content(&$a) {
 	$text = get_pconfig($a->profile['profile_uid'],'system','selltext');
 
 	if($edit) {
+		$channel = $a->get_channel();
+
 		$o = replace_macros(get_markup_template('sellpage_edit.tpl'),array(
+			'$header' => t('Premium Channel Setup'),
+			'$address' => $a->profile['channel_address'],
+			'$premium' => array('premium', t('Enable premium channel connection restrictions'),(($channel['channel_pageflags'] & PAGE_PREMIUM) ? '1' : ''),''),
+			'$lbl_about' => t('Please enter your restrictions or conditions, such as paypal receipt, usage guidelines, etc.'),
+ 			'$text' => $text,
+			'$desc' => t('This channel may require additional steps or acknowledgement of the following conditions prior to connecting:'),
+			'$lbl2' => t('Potential connections will then see the following text before proceeding:'),
+			'$desc2' => t('By continuing, I certify that I have complied with any instructions provided on this page.'),
+			'$submit' => t('Submit'),
 
 
 		));
 		return $o;
 	}
 	else {
+		if(! $text)
+			$text = t('(No specific instructions have been provided by the channel owner.)');
+
 		$submit = replace_macros(get_markup_template('sellpage_submit.tpl'), array(
 			'$continue' => t('Continue'),			
 			'$address' => $a->profile['channel_address']
 		));
 
 		$o = replace_macros(get_markup_template('sellpage_view.tpl'),array(
-			'$header' => t('Restricted Channel'),
+			'$header' => t('Restricted or Premium Channel'),
 			'$desc' => t('This channel may require additional steps or acknowledgement of the following conditions prior to connecting:'),
 			'$text' => prepare_text($text), 
 
@@ -90,8 +105,9 @@ function connect_content(&$a) {
 
 		));
 
-
-
+		$arr = array('profile' => $a->profile,'observer' => $a->get_observer(), 'sellpage' => $o, 'submit' => $submit);
+		call_hooks('connect_premium', $arr);
+		$o = $arr['sellpage'];
 
 	}
 

mod/follow.php

@@ -12,8 +12,9 @@ function follow_init(&$a) {
 	$uid = local_user();
 	$url = notags(trim($_REQUEST['url']));
 	$return_url = $_SESSION['return_url'];
+	$confirm = intval($_REQUEST['confirm']);
 
-	$result = new_contact($uid,$url,$a->get_channel(),true);
+	$result = new_contact($uid,$url,$a->get_channel(),true,$confirm);
 
 	if($result['success'] == false) {
 		if($result['message'])

mod/zfinger.php

@@ -140,7 +140,7 @@ function zfinger_init(&$a) {
 	// This is a template - %s will be replaced with the follow_url we discover for the return channel.
 
 	if($special_channel) 
-		$ret['connect_url'] = z_root() . '/connect/' . $e['channel_address'] . '?f=&follow=%s';
+		$ret['connect_url'] = z_root() . '/connect/' . $e['channel_address'];
 
 	// This is a template for our follow url, %s will be replaced with a webbie
 

view/css/mod_connect.css

@@ -1,3 +1,11 @@
+.sellpage-body {
+	margin-top: 25px;
+}
+
 .sellpage-final {
 	margin-top: 25px;
+}
+
+#sellpage-edit label{
+	width: 300px;
 }

view/tpl/sellpage_edit.tpl

@@ -0,0 +1,23 @@
+<h1>{{$header}}</h1>
+<form id="sellpage-edit" action="connect/{{$address}}" method="post">
+
+{{include file="field_checkbox.tpl" field=$premium}}
+
+<div class="descriptive-text">{{$desc}}</div>
+
+<div class="sellpage-editbody">
+<p id="sellpage-bodydesc" >
+{{$lbl_about}}
+</p>
+
+<textarea rows="10" cols="72" id="sellpage-textinp" name="text" >{{$text}}</textarea>
+
+</div>
+<div id="sellpage-editbody-end"></div>
+
+
+<div class="descriptive-text">{{$lbl2}}</div>
+<div class="sellpage-final">{{$desc2}}</div>
+
+<input type="submit" name="submit" value="{{$submit}}" />
+</form>