Implement LegacyConverter

Core/src/main/java/com/github/intellectualsites/plotsquared/plot/util/LegacyConverter.java

@@ -0,0 +1,112 @@
+package com.github.intellectualsites.plotsquared.plot.util;
+
+import com.github.intellectualsites.plotsquared.configuration.ConfigurationSection;
+import com.github.intellectualsites.plotsquared.plot.object.BlockBucket;
+import com.github.intellectualsites.plotsquared.plot.object.PlotBlock;
+import lombok.NonNull;
+
+import java.util.*;
+
+/**
+ * Converts legacy configurations into the new (BlockBucket) format
+ */
+@SuppressWarnings("unused")
+public final class LegacyConverter {
+
+    private enum ConfigurationType {
+        BLOCK, BLOCK_LIST
+    }
+
+    private static final HashMap<String, ConfigurationType> TYPE_MAP = new HashMap<>();
+
+    static {
+        TYPE_MAP.put("plot.filling", ConfigurationType.BLOCK_LIST);
+        TYPE_MAP.put("plot.floor", ConfigurationType.BLOCK_LIST);
+        TYPE_MAP.put("wall.filling", ConfigurationType.BLOCK);
+        TYPE_MAP.put("wall.block_claimed", ConfigurationType.BLOCK);
+        TYPE_MAP.put("wall.block", ConfigurationType.BLOCK);
+        TYPE_MAP.put("road.block", ConfigurationType.BLOCK);
+    }
+
+    private final ConfigurationSection configuration;
+
+    public LegacyConverter(@NonNull final ConfigurationSection configuration) {
+        this.configuration = configuration;
+    }
+
+    private BlockBucket blockToBucket(@NonNull final String block) {
+        final PlotBlock plotBlock = WorldUtil.IMP.getClosestBlock(block).best;
+        return BlockBucket.withSingle(plotBlock);
+    }
+
+    private void setString(@NonNull final ConfigurationSection section, @NonNull final String string, @NonNull final BlockBucket blocks) {
+        if (!this.configuration.contains(string)) {
+            throw new IllegalArgumentException(String.format("No such key: %s", string));
+        }
+        section.set(string, blocks.toString());
+    }
+
+    private BlockBucket blockListToBucket(@NonNull final PlotBlock[] blocks) {
+        final Map<PlotBlock, Integer> counts = new HashMap<>();
+        for (final PlotBlock block : blocks) {
+            if (!counts.containsKey(block)) {
+                counts.put(block, 0);
+            }
+            counts.put(block, counts.get(block) + 1);
+        }
+        boolean includeRatios = false;
+        for (final Integer integer : counts.values()) {
+            if (integer > 1) {
+                includeRatios = true;
+                break;
+            }
+        }
+        final BlockBucket bucket = new BlockBucket();
+        if (includeRatios) {
+            final double ratio = 100D / blocks.length;
+            for (final Map.Entry<PlotBlock, Integer> count : counts.entrySet()) {
+                bucket.addBlock(count.getKey(), (int) (count.getValue() * ratio));
+            }
+        } else {
+            counts.keySet().forEach(bucket::addBlock);
+        }
+        return bucket;
+    }
+
+    private PlotBlock[] splitBlockList(@NonNull final List<String> list) {
+        final PlotBlock[] entries = new PlotBlock[list.size()];
+        for (int i = 0; i < list.size(); i++) {
+            entries[i] = WorldUtil.IMP.getClosestBlock(list.get(i)).best;
+        }
+        return entries;
+    }
+
+    private void convertBlock(@NonNull final ConfigurationSection section, @NonNull final String key,
+        @NonNull final String block) {
+        final BlockBucket bucket = this.blockToBucket(block);
+        this.setString(section, key, bucket);
+    }
+
+    private void convertBlockList(@NonNull final ConfigurationSection section, @NonNull final String key,
+        @NonNull final List<String> blockList) {
+        final PlotBlock[] blocks = this.splitBlockList(blockList);
+        final BlockBucket bucket = this.blockListToBucket(blocks);
+        this.setString(section, key, bucket);
+    }
+
+    public void convert() {
+        // Section is the "worlds" section
+        final Collection<String> worlds = this.configuration.getKeys(false);
+        for (final String world : worlds) {
+            final ConfigurationSection worldSection = configuration.getConfigurationSection(world);
+            for (final Map.Entry<String, ConfigurationType> entry : TYPE_MAP.entrySet()) {
+                 if (entry.getValue() == ConfigurationType.BLOCK) {
+                     this.convertBlock(worldSection, entry.getKey(), worldSection.getString(entry.getKey()));
+                 } else {
+                     this.convertBlockList(worldSection, entry.getKey(), worldSection.getStringList(entry.getKey()));
+                 }
+            }
+        }
+    }
+
+}