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 ac554ed3691877192c2532a6175d4f2948c0c246..87e1d2d744bd09297fafed0b8050e5eb81d66d78 100644 (file)
--- a/wwwroot/backend/mysql/backend.inc
+++ b/wwwroot/backend/mysql/backend.inc
@@ -341,32 +341,45 @@ function getKNeurons($user_id,$interval) {
        return $k_array;
 }
 
-// Set synapse weight,
+// setSynapse
 
-// Secure
-// Returns true on sucess, otherwise false
+// Set synapse weight. 
+// If synapse does not exists, create a new one.
+// Secure.
+// Returns true on sucess, otherwise false.
 
-// XXX TODO
-
-function setSynapse($src,$dst,$weight) {
+function setSynapse($params){
        global $db,$node,$error,$error_messages;
 
-       if ((!is_numeric($src)) or (!is_numeric($dst)) or (!is_numeric($weight))) {
+       // security check
+       if ((!is_numeric($params['src'])) 
+               or (!is_numeric($params['dst']))
+               or (!is_numeric($params['weight']))) {
+
+               return false;
+       }
+
+       $src=$params['src'];
+       $dst=$params['dst'];
+       $weight=$params['weight'];
+
+       // weight could be only positive
+       if ( $weight < 0) {
                return false;
        }
 
        // if already exists
-       $q="select src from neurons where dst ='$dst' and src = '$src'";
+       $q="select count(src) from neurons where dst ='$dst' and src = '$src'";
        $set=$db->query($q);
-
        $set->next();
-       $isrc=$set->getString('src');
-       if ( $set ) {
-               $q="update neurons set synapse_weight='$synapse_weight' 
+       $isrc=$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
-               $q="insert into neurons values('$synapse_weight','$dst','$src',0,'synapse',
+               $q="insert into neurons values('$weight','$dst','$src',0,'synapse',
                                                CURRENT_TIMESTAMP(),now(),NULL,$src)";
        }
        $set=$db->query($q);