Timesheet validator: prevent overbooking budgets (#2422)

src/Entity/Project.php

@@ -432,6 +432,11 @@ class Project implements EntityWithMetaFields
         return $this->budget;
     }
 
+    public function hasBudget(): bool
+    {
+        return $this->budget > 0.00;
+    }
+
     public function setTimeBudget(int $seconds): Project
     {
         $this->timeBudget = $seconds;
@@ -444,6 +449,11 @@ class Project implements EntityWithMetaFields
         return $this->timeBudget;
     }
 
+    public function hasTimeBudget(): bool
+    {
+        return $this->timeBudget > 0;
+    }
+
     /**
      * @return Collection|MetaTableTypeInterface[]
      */