return $k_array;
}
-// Set synapse weight,
+// setSynapse
-// Secure
-// Returns true on sucess, otherwise false
-
-// XXX TODO
+// Set synapse weight.
+// If synapse does not exists, create a new one.
+// Secure.
+// Returns true on sucess, otherwise false.
function setSynapse($params){
global $db,$node,$error,$error_messages;
- if ((!is_numeric($params['src'])) or (!is_numeric($params['dst'])) or (!is_numeric($params['weight']))) {
+ // security check
+ if ((!is_numeric($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($q);
return true;
}
+// getSynapseWeight
+
+// If synapse does not exists, weight is 1
+// Secure.
+// Returns synapse weight (from user to node)
+function getSynapseWeight($user_id,$node_id){
+ global $db;
+
+ if (!is_numeric($user_id))
+ { return -1; }
+ if (!is_numeric($node_id))
+ { return -1; }
+
+ $set=$db->query("select synapse_weight from neurons where src =".
+ $user_id." and dst = ".$node_id." and link='synapse'");
+
+ $set->next();
+ $synapse_weight=$set->getString('synapse_weight');
+
+ if (! ($synapse_weight) ) { $synapse_weight = 1;}
+
+ return $synapse_weight;
}
+}
+
+?>