Merge remote-tracking branch 'origin/master'

# Conflicts:
#	src/main/resources/assets/lookingglass/blockstates/cursed_earth.json

src/main/java/azzy/fabric/lookingglass/block/CursedEarthBlock.java

@@ -1,7 +1,10 @@
 package azzy.fabric.lookingglass.block;
 
 import net.fabricmc.fabric.api.object.builder.v1.block.FabricBlockSettings;
+import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.block.Material;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.util.math.BlockPos;
 
@@ -15,11 +18,91 @@ public CursedEarthBlock(FabricBlockSettings settings) {
     @Override
     public void randomTick(BlockState state, ServerWorld world, BlockPos pos, Random random) {
         if (!world.isClient)
-            doTick(world, pos, true);
+            doTick(world, pos, random);
     }
 
-    protected void doTick(ServerWorld world, BlockPos pos, boolean fastSpreading) {
+    protected void doTick(ServerWorld world, BlockPos pos, Random random) {
         int light = world.getLightLevel(pos.up());
         System.out.println("Reached here...: '" + light + "'.");
+
+        // Light level 14 is torch.  15 is fire, lava, campfire, etc.
+        if (light >= 14) {
+            BlockState blockState = world.getBlockState(pos.up());
+            boolean onFire = (blockState.getMaterial() == Material.FIRE);
+
+            if (onFire) {
+                // If the block catches on fire, it turns to dirt, gravel or sand.
+                turnCursedEarthToSlag(world, pos, random);
+
+                // Spread the fire to all nearby blocks.
+                for (int x = -1; x < 2; x++) {
+                    for (int y = -1; y < 2; y++) {
+                        for (int z = -1; z < 2; z++) {
+                            BlockPos tmpPos = pos.add(x, y, z);
+                            // If the nearby block is a cursed earth block
+                            if (world.getBlockState(tmpPos).getBlock() == LookingGlassBlocks.CURSED_EARTH_BLOCK) {
+                                if (random.nextInt(5) == 0) {
+                                    // 1 in 5 chance to catch on fire.
+                                    world.setBlockState(tmpPos.up(), Blocks.FIRE.getDefaultState());
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
+            for (int x = -1; x < 2; x++) {
+                for (int y = -1; y < 2; y++) {
+                    for (int z = -1; z < 2; z++) {
+                        BlockPos tmpPos = pos.add(x, y, z);
+                        // If the nearby block is on fire
+                        if (world.getBlockState(tmpPos.up()).getMaterial() == Material.FIRE) {
+                            if (random.nextInt(5) == 0) {
+                                // 1 in 5 chance to catch self fire.
+                                world.setBlockState(pos.up(), Blocks.FIRE.getDefaultState());
+                            }
+                        }
+                    }
+                }
+            }
+        } else if (light <= 7) {
+            for (int x = -1; x < 2; x++) {
+                for (int y = -1; y < 2; y++) {
+                    for (int z = -1; z < 2; z++) {
+                        BlockPos tmpPos = pos.add(x, y, z);
+                        // If the nearby block is on fire
+                        Block neighbor = world.getBlockState(tmpPos).getBlock();
+                        if ((neighbor == Blocks.DIRT) || (neighbor == Blocks.GRASS_BLOCK) || (neighbor == Blocks.GRASS_PATH)) {
+                            if (random.nextInt(50) == 0) {
+                                // 1 in 50 chance to turn neighbor into cursed earth.
+                                world.setBlockState(tmpPos, LookingGlassBlocks.CURSED_EARTH_BLOCK.getDefaultState());
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        // TODO 4:  Spawn random mobs as required
+
+    }
+
+    private void turnCursedEarthToSlag(ServerWorld world, BlockPos pos, Random random) {
+        int replaceFlag = random.nextInt(10);
+
+        switch (replaceFlag) {
+            case 0:
+                // Replace to dirt.
+                world.setBlockState(pos, Blocks.DIRT.getDefaultState());
+                return;
+            case 1:
+                // Replace to gravel.
+                world.setBlockState(pos, Blocks.GRAVEL.getDefaultState());
+                return;
+            case 2:
+                // Replace to sand.
+                world.setBlockState(pos, Blocks.SAND.getDefaultState());
+                return;
+        }
     }
 }