api#326 Сохранить прежний random и чужие JSON токены

components/utm-codec.php

@@ -50,16 +50,32 @@ function prelandResolveUtm(array $query, array $config): array
         $value=$query[$key] ?? null;
         $digit=is_string($value) && preg_match('/\A.{4}([0-9])/us',$value,$match) ? $match[1] : null;
         if ($digit==='0') {
-            $weights=[];
-            foreach ((array)($settings['weights'] ?? []) as $variant=>$weight) {
-                if ($valid($variant) && is_numeric($weight) && is_finite((float)$weight) && (float)$weight>0) $weights[$variant]=(float)$weight;
-            }
-            $total=array_sum($weights); $digit=$default;
-            if ($total>0 && is_finite($total)) {
-                $point=mt_rand()/(mt_getrandmax()+1.0)*$total;
-                foreach ($weights as $variant=>$weight) {
-                    if ($point<$weight) { $digit=(string)$variant; break; }
-                    $point-=$weight;
+            // Generic resolver исторически выбирает первый ключ при sum<=0;
+            // cons имеет отдельный контракт: только положительные веса и default.
+            if ($key !== 'cons') {
+                $weights=(array)($settings['weights'] ?? []);
+                $total=array_sum($weights);
+                $digit=$weights ? (string)array_key_first($weights) : $default;
+                if ($total>0 && is_finite((float)$total)) {
+                    $point=mt_rand()/mt_getrandmax()*$total; $current=0.0;
+                    foreach ($weights as $variant=>$weight) {
+                        $current+=(float)$weight;
+                        $digit=(string)$variant;
+                        if ($point<=$current) break;
+                    }
+                }
+            } else {
+                $weights=[];
+                foreach ((array)($settings['weights'] ?? []) as $variant=>$weight) {
+                    if ($valid($variant) && is_numeric($weight) && is_finite((float)$weight) && (float)$weight>0) $weights[$variant]=(float)$weight;
+                }
+                $total=array_sum($weights); $digit=$default;
+                if ($total>0 && is_finite($total)) {
+                    $point=mt_rand()/(mt_getrandmax()+1.0)*$total;
+                    foreach ($weights as $variant=>$weight) {
+                        if ($point<$weight) { $digit=(string)$variant; break; }
+                        $point-=$weight;
+                    }
                 }
             }
         }