two tracks proceeding in parallel - first adding the ability to store a digital signature with ratings so that directories can pass them around, second provide some directory registration functions so we can obtain a list of directories from somewhere (to pass ratings around between them). This gives the primary directory role some value as that is where you register your directory.

mod/regdir.php

@@ -0,0 +1,64 @@
+<?php
+
+
+function regdir_init(&$a) {
+
+	$result = array('success' => false);
+
+	$url = $_REQUEST['url'];
+
+
+	// we probably don't need the realm as we will find out in the probe.
+	// What we may want to die is throw an error if you're trying to register in a different realm
+	// so this configuration issue can be discovered.
+
+	$realm = $_REQUEST['realm'];
+	if(! $realm)
+		$realm = DIRECTORY_REALM;
+
+	$dirmode = intval(get_config('system','directory_mode'));
+
+	if($dirmode == DIRECTORY_MODE_NORMAL) {
+		$ret['message'] = t('This site is not a directory server');
+		json_return_and_die($ret);
+	}
+
+	$m = null;
+	if($url) {
+		$m = parse_url($url);
+
+		if((! $m) || (! @dns_get_record($m['host'], DNS_A + DNS_CNAME + DNS_PTR)) || (! filter_var($m['host'], FILTER_VALIDATE_IP) )) {
+			$result['message'] = 'unparseable url';
+			json_return_and_die($result);
+		}
+
+		$f = zot_finger('sys@' . $m['host']);
+		if($f['success']) {
+			$j = json_decode($f['body'],true);
+			if($j['success'] && $j['guid']) {
+				$x = import_xchan($j);
+				if($x['success']) {
+					$result['success'] = true;
+					json_return_and_die($result);
+				}
+			}
+		}
+
+		json_return_and_die($result);
+	}
+	else {
+		$r = q("select site_url from site where site_flags in ( 1, 2 ) and site_realm = '%s'",
+			dbesc(get_directory_realm())
+		);
+		if($r) {
+			$result['success'] = true;
+			$result['directories'] = array();
+			foreach($r as $rr)
+				$result['directories'][] = $rr['site_url'];
+			json_return_and_die($result);
+		}
+	}
+	json_return_and_die($result);
+		
+
+}