Initial commit

src/main/java/net/fretux/skillengine/skilltree/SkillLogic.java

@@ -0,0 +1,17 @@
+package net.fretux.skillengine.skilltree;
+
+import net.fretux.skillengine.capability.PlayerSkillData;
+import net.minecraft.resources.ResourceLocation;
+
+public class SkillLogic {
+
+    public static boolean canUnlock(PlayerSkillData data, SkillNode node) {
+        if (data.isUnlocked(node.getId())) return false;
+        if (data.getSkillPoints() < node.getCost()) return false;
+        if (node.isRoot()) return true;
+        for (ResourceLocation neighborId : node.getLinks()) {
+            if (data.isUnlocked(neighborId)) return true;
+        }
+        return false;
+    }
+}