k_neurons fix & small warnings removed

[mirrors/Kyberia-bloodline.git] / wwwroot / backend / mysql / backend.inc

diff --git a/wwwroot/backend/mysql/backend.inc b/wwwroot/backend/mysql/backend.inc
index dd0c4f7cf82b6512973aa03e88a741dca6029364..87e1d2d744bd09297fafed0b8050e5eb81d66d78 100644 (file)
--- a/wwwroot/backend/mysql/backend.inc
+++ b/wwwroot/backend/mysql/backend.inc
@@ -341,18 +341,48 @@ function getKNeurons($user_id,$interval) {
        return $k_array;
 }
 
-// Set synapse weight,
+// setSynapse
 
-// XXX TODO
+// Set synapse weight. 
+// If synapse does not exists, create a new one.
+// Secure.
+// Returns true on sucess, otherwise false.
 
-function setSynapse($src,$dst,$weight) {
+function setSynapse($params){
        global $db,$node,$error,$error_messages;
 
-       // XXX security fix
-//     $q="update neurons set synapse_weight='$synapse_weight' where dst = '$dst' and src = '$src'";
-//     $q="insert into neurons values('$synapse_weight','$dst','$src',NULL,'synapse',XXX,now(),XXX,$src)";
+       // security check
+       if ((!is_numeric($params['src'])) 
+               or (!is_numeric($params['dst']))
+               or (!is_numeric($params['weight']))) {
 
-//     $set=$db->query($q);
+               return false;
+       }
+
+       $src=$params['src'];
+       $dst=$params['dst'];
+       $weight=$params['weight'];
+
+       // weight could be only positive
+       if ( $weight < 0) {
+               return false;
+       }
+
+       // if already exists
+       $q="select count(src) from neurons where dst ='$dst' and src = '$src'";
+       $set=$db->query($q);
+       $set->next();
+       $isrc=$set->getString('count(src)');
+
+       if ( $isrc > 0 ) {
+               $q="update neurons set synapse_weight='$weight' 
+                       where dst = '$dst' and src = '$src'";
+       } else { 
+               // FIXME no vector set
+               $q="insert into neurons values('$weight','$dst','$src',0,'synapse',
+                                               CURRENT_TIMESTAMP(),now(),NULL,$src)";
+       }
+       $set=$db->query($q);
 
        return true;
 }