move seedhack into common

platforms/mod-common/src/main/java/com/dfsek/terra/mod/util/SeedHack.java

@@ -0,0 +1,29 @@
+package com.dfsek.terra.mod.util;
+
+import it.unimi.dsi.fastutil.objects.Object2LongMap;
+import it.unimi.dsi.fastutil.objects.Object2LongOpenHashMap;
+import net.minecraft.world.biome.source.util.MultiNoiseUtil.MultiNoiseSampler;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Holder for hacky biome source seed workaround
+ */
+public class SeedHack {
+    private static final Logger LOGGER = LoggerFactory.getLogger(SeedHack.class);
+    
+    private static final Object2LongMap<MultiNoiseSampler> seedMap = new Object2LongOpenHashMap<>();
+    
+    public static long getSeed(MultiNoiseSampler sampler) {
+        if(!seedMap.containsKey(sampler)) {
+            throw new IllegalArgumentException("Sampler is not registered: " + sampler);
+        }
+        return seedMap.getLong(sampler);
+    }
+    
+    public static void register(MultiNoiseSampler sampler, long seed) {
+        LOGGER.info("Registered seed {} to sampler {}", seed, sampler.hashCode());
+        seedMap.put(sampler, seed);
+    }
+}