LightEngine impl for FakeLevel (#687)

Closes #682

src/main/java/com/ldtteam/structurize/client/fakelevel/FakeLevel.java

@@ -90,6 +90,7 @@ public class FakeLevel extends Level
     protected final boolean overrideBeLevel;
 
     protected final FakeChunkSource chunkSource;
+    protected final FakeLevelLightEngine lightEngine;
     protected FakeLevelEntityGetterAdapter levelEntityGetter = FakeLevelEntityGetterAdapter.EMPTY;
     // TODO: this is currently manually filled by class user - ideally if not filled yet this should get constructed from levelSource manually
     protected Map<BlockPos, BlockEntity> blockEntities = Collections.emptyMap();
@@ -124,6 +125,7 @@ public FakeLevel(final IFakeLevelBlockGetter levelSource, final IFakeLevelLightP
         this.scoreboard = scoreboard == null ? clientLevel().getScoreboard() : scoreboard;
         this.overrideBeLevel = overrideBeLevel;
         this.chunkSource = new FakeChunkSource(this);
+        this.lightEngine = new FakeLevelLightEngine(this);
     }
 
     // ========================================
@@ -345,6 +347,12 @@ public ChunkSource getChunkSource()
         return chunkSource;
     }
 
+    @Override
+    public LevelLightEngine getLightEngine()
+    {
+        return lightEngine;
+    }
+
     @Override
     public String gatherChunkSourceStats()
     {
@@ -403,13 +411,6 @@ public Holder<Biome> getNoiseBiome(int x, int y, int z)
     // ======= NOOP UNSAFE NULL METHODS =======
     // ========================================
 
-    @Override
-    public LevelLightEngine getLightEngine()
-    {
-        // TODO: noop
-        throw new UnsupportedOperationException("Structurize fake level - if you really need light engine please make issue on our GitHub");
-    }
-
     @Override
     public Explosion explode(@javax.annotation.Nullable Entity p_256233_,
         @javax.annotation.Nullable DamageSource p_255861_,

src/main/java/com/ldtteam/structurize/client/fakelevel/FakeLevelLightEngine.java

@@ -0,0 +1,233 @@
+package com.ldtteam.structurize.client.fakelevel;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.SectionPos;
+import net.minecraft.world.level.BlockGetter;
+import net.minecraft.world.level.ChunkPos;
+import net.minecraft.world.level.LightLayer;
+import net.minecraft.world.level.chunk.DataLayer;
+import net.minecraft.world.level.chunk.LightChunk;
+import net.minecraft.world.level.chunk.LightChunkGetter;
+import net.minecraft.world.level.lighting.LayerLightEventListener;
+import net.minecraft.world.level.lighting.LayerLightSectionStorage.SectionType;
+import net.minecraft.world.level.lighting.LevelLightEngine;
+import javax.annotation.Nullable;
+
+/**
+ * Porting: class is relatively small, just check super class manually (all of missing methods are/were just aliases)
+ */
+public class FakeLevelLightEngine extends LevelLightEngine
+{
+    private final FakeLevel fakeLevel;
+    private FakeLevelLayerLightEventListener blockLightLayer = null;
+    private FakeLevelLayerLightEventListener skyLightLayer = null;
+
+    public FakeLevelLightEngine(final FakeLevel level)
+    {
+        super(new LightChunkGetter()
+        {
+            @Override
+            public LightChunk getChunkForLighting(final int p_63023_, final int p_63024_)
+            {
+                throw new UnsupportedOperationException("Should never happen - FakeLevel light engine ctor");
+            }
+
+            @Override
+            public BlockGetter getLevel()
+            {
+                return level;
+            }
+        }, false, false);
+
+        this.fakeLevel = level;
+    }
+
+    @Override
+    public int getRawBrightness(final BlockPos p_75832_, final int p_75833_)
+    {
+        return fakeLevel.getRawBrightness(p_75832_, p_75833_);
+    }
+
+    @Override
+    public String getDebugData(final LightLayer p_75817_, final SectionPos p_75818_)
+    {
+        return "FakeLevel light engine redirect - " + p_75817_;
+    }
+
+    @Override
+    public LayerLightEventListener getLayerListener(final LightLayer p_75815_)
+    {
+        return switch (p_75815_)
+        {
+            case BLOCK -> {
+                if (blockLightLayer == null)
+                {
+                    blockLightLayer = new FakeLevelLayerLightEventListener(p_75815_);
+                }
+                yield blockLightLayer;
+            }
+            case SKY -> {
+                if (skyLightLayer == null)
+                {
+                    skyLightLayer = new FakeLevelLayerLightEventListener(p_75815_);
+                }
+                yield skyLightLayer;
+            }
+        };
+    }
+
+    @Override
+    public SectionType getDebugSectionType(final LightLayer p_285008_, final SectionPos p_285336_)
+    {
+        // Noop, only debug rendering ?
+        return SectionType.EMPTY;
+    }
+
+    @Override
+    public boolean lightOnInSection(final SectionPos p_285319_)
+    {
+        // Noop, used only in chunk compiling?
+        return false;
+    }
+
+    @Override
+    public void checkBlock(final BlockPos p_75823_)
+    {
+        // Noop
+    }
+
+    @Override
+    public boolean hasLightWork()
+    {
+        // Noop
+        return false;
+    }
+
+    @Override
+    public void propagateLightSources(final ChunkPos p_284998_)
+    {
+        // Noop
+    }
+
+    @Override
+    public void queueSectionData(final LightLayer p_285328_, final SectionPos p_284962_, final DataLayer p_285035_)
+    {
+        // Noop
+    }
+
+    @Override
+    public void retainData(final ChunkPos p_75829_, final boolean p_75830_)
+    {
+        // Noop
+    }
+
+    @Override
+    public int runLightUpdates()
+    {
+        // Noop
+        return 0;
+    }
+
+    @Override
+    public void setLightEnabled(final ChunkPos p_285439_, final boolean p_285012_)
+    {
+        // Noop
+    }
+
+    @Override
+    public void updateSectionStatus(final SectionPos p_75827_, final boolean p_75828_)
+    {
+        // Noop
+    }
+
+    @Override
+    public void updateSectionStatus(final BlockPos p_75835_, final boolean p_75836_)
+    {
+        // Noop
+    }
+
+    /*
+    @Override
+    public int getLightSectionCount()
+    {
+        // super is fine
+        return super.getLightSectionCount();
+    }
+    
+    @Override
+    public int getMaxLightSection()
+    {
+        // super is fine
+        return super.getMaxLightSection();
+    }
+    
+    @Override
+    public int getMinLightSection()
+    {
+        // super is fine
+        return super.getMinLightSection();
+    }
+    */
+
+    private class FakeLevelLayerLightEventListener implements LayerLightEventListener
+    {
+        private final LightLayer lightLayer;
+
+        private FakeLevelLayerLightEventListener(final LightLayer lightLayer)
+        {
+            this.lightLayer = lightLayer;
+        }
+
+        @Override
+        public void checkBlock(final BlockPos p_164454_)
+        {
+            // Noop
+        }
+
+        @Override
+        public boolean hasLightWork()
+        {
+            // Noop
+            return false;
+        }
+
+        @Override
+        public int runLightUpdates()
+        {
+            // Noop
+            return 0;
+        }
+
+        @Override
+        public void updateSectionStatus(final SectionPos p_75837_, final boolean p_75838_)
+        {
+            // Noop
+        }
+
+        @Override
+        public void setLightEnabled(final ChunkPos p_164452_, final boolean p_164453_)
+        {
+            // Noop
+        }
+
+        @Override
+        public void propagateLightSources(final ChunkPos p_285263_)
+        {
+            // Noop
+        }
+
+        @Override
+        @Nullable
+        public DataLayer getDataLayerData(final SectionPos p_75709_)
+        {
+            // Noop
+            return null;
+        }
+
+        @Override
+        public int getLightValue(final BlockPos p_75710_)
+        {
+            return fakeLevel.getBrightness(lightLayer, p_75710_);
+        }
+    }
+}