Add converting framework as well as the converter for Backpack

Adds command /pvconvert <all | plugin name>
Adds permission playervaults.convert
Adds Converter interface for future converters
Adds BackpackConverter - A converter for Backpack
(http://dev.bukkit.org/bukkit-plugins/backpack/)

src/main/java/com/drtshock/playervaults/PlayerVaults.java

@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2013 drtshock
  *
  * This program is free software: you can redistribute it and/or modify
@@ -77,6 +77,7 @@ public class PlayerVaults extends JavaPlugin {
         getCommand("pvdel").setExecutor(new DeleteCommand());
         getCommand("pvsign").setExecutor(new SignCommand());
         getCommand("workbench").setExecutor(new WorkbenchCommand());
+        getCommand("pvconvert").setExecutor(new ConvertCommand());
         useVault = setupEconomy();
         startMetrics();
 

src/main/java/com/drtshock/playervaults/commands/ConvertCommand.java

@@ -0,0 +1,57 @@
+package com.drtshock.playervaults.commands;
+
+import com.drtshock.playervaults.converters.BackpackConverter;
+import com.drtshock.playervaults.converters.Converter;
+import com.drtshock.playervaults.util.Lang;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ConvertCommand implements CommandExecutor {
+
+    private List<Converter> converters = new ArrayList<>();
+
+    public ConvertCommand() {
+        converters.add(new BackpackConverter());
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (!sender.hasPermission("playervaults.convert")) {
+            sender.sendMessage(Lang.TITLE.toString() + Lang.NO_PERMS);
+        } else {
+            if (args.length == 0) {
+                sender.sendMessage(Lang.TITLE + "/pvconvert <all | plugin name>");
+            } else {
+                String name = args[0];
+                List<Converter> applicableConverters = new ArrayList<>();
+                if (name.equalsIgnoreCase("all")) {
+                    applicableConverters.addAll(converters);
+                } else {
+                    for (Converter converter : converters) {
+                        if (converter.getName().equalsIgnoreCase(name)) {
+                            applicableConverters.add(converter);
+                        }
+                    }
+                }
+
+                if (applicableConverters.size() <= 0) {
+                    sender.sendMessage(Lang.TITLE.toString() + Lang.CONVERT_PLUGIN_NOT_FOUND);
+                } else {
+                    int converted = 0;
+                    for (Converter converter : applicableConverters) {
+                        if (converter.canConvert()) {
+                            converted += converter.doConvert();
+                        }
+                    }
+                    sender.sendMessage(Lang.TITLE + Lang.CONVERT_COMPLETE.toString().replace("%converted", converted + ""));
+                }
+            }
+        }
+
+        return true;
+    }
+}

src/main/java/com/drtshock/playervaults/converters/BackpackConverter.java

@@ -0,0 +1,95 @@
+package com.drtshock.playervaults.converters;
+
+import com.drtshock.playervaults.PlayerVaults;
+import com.drtshock.playervaults.vaultmanagement.UUIDVaultManager;
+import org.bukkit.OfflinePlayer;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.inventory.Inventory;
+import org.bukkit.inventory.ItemStack;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.UUID;
+
+/**
+ * Simple converter for Backpack (http://dev.bukkit.org/bukkit-plugins/backpack/)
+ *
+ * @author turt2live
+ */
+public class BackpackConverter implements Converter {
+
+    @Override
+    public int doConvert() {
+        PlayerVaults plugin = PlayerVaults.getInstance();
+        File destination = new File(plugin.getDataFolder().getParentFile(), "Backpack" + File.separator + "backpacks");
+        if (!destination.exists()) return -1;
+
+        int converted = 0;
+
+        File[] worldDirs = destination.listFiles();
+        int vaultNum = 1;
+        for (File file : worldDirs != null ? worldDirs : new File[0]) {
+            if (file.isDirectory()) {
+                converted += convert(file, vaultNum);
+                vaultNum++;
+            }
+        }
+
+        return converted;
+    }
+
+    private int convert(File worldFolder, int intoVaultNum) {
+        PlayerVaults plugin = PlayerVaults.getInstance();
+        UUIDVaultManager vaults = UUIDVaultManager.getInstance();
+        int converted = 0;
+        File[] files = worldFolder.listFiles();
+        for (File file : files != null ? files : new File[0]) {
+            if (file.isFile() && file.getName().toLowerCase().endsWith(".yml")) {
+                OfflinePlayer player = plugin.getServer().getOfflinePlayer(file.getName().substring(0, file.getName().lastIndexOf('.')));
+                if (player == null || player.getUniqueId() == null) {
+                    plugin.getLogger().warning("Unable to convert Backpack for player: " + (player != null ? player.getName() : file.getName()));
+                } else {
+                    UUID uuid = player.getUniqueId();
+                    FileConfiguration yaml = YamlConfiguration.loadConfiguration(file);
+                    ConfigurationSection section = yaml.getConfigurationSection("backpack");
+                    if (section.getKeys(false).size() <= 0) continue; // No slots
+
+                    Inventory vault = vaults.getVault(uuid, intoVaultNum);
+                    if (vault == null) vault = plugin.getServer().createInventory(null, section.getKeys(false).size());
+                    for (String key : section.getKeys(false)) {
+                        ConfigurationSection slotSection = section.getConfigurationSection(key);
+                        ItemStack item = slotSection.getItemStack("ItemStack");
+                        if (item == null) continue;
+
+                        // Overwrite
+                        vault.setItem(Integer.parseInt(key.split(" ")[1]), item);
+                    }
+                    try {
+                        vaults.saveVault(vault, uuid, intoVaultNum);
+                        converted++;
+                    } catch (IOException e) {
+                        plugin.getLogger().severe("Error converting Backpack: " + file.getName());
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        return converted;
+    }
+
+    @Override
+    public boolean canConvert() {
+        PlayerVaults plugin = PlayerVaults.getInstance();
+        File expectedFolder = new File(plugin.getDataFolder().getParentFile(), "Backpack");
+        if (!expectedFolder.exists()) return false;
+        File backpackDir = new File(expectedFolder, "backpacks");
+        return backpackDir.exists();
+    }
+
+    @Override
+    public String getName() {
+        return "Backpack";
+    }
+}

src/main/java/com/drtshock/playervaults/converters/Converter.java

@@ -0,0 +1,34 @@
+package com.drtshock.playervaults.converters;
+
+/**
+ * Represents a simple converter for converting another plugin's content
+ * to PlayerVaults.
+ *
+ * @author turt2live
+ */
+public interface Converter {
+
+    /**
+     * Converts the other plugin's data.
+     *
+     * @return the number of vaults converted. Returns 0 on none converted
+     * or -1 if no vaults were converted.
+     */
+    public int doConvert();
+
+    /**
+     * Determines if this converter is applicable for converting to PlayerVaults.
+     * This may check for the existance of a plugin, plugin folder, or otherwise.
+     *
+     * @return true if this converter can convert, false otherwise
+     */
+    public boolean canConvert();
+
+    /**
+     * Gets the name of this converter
+     *
+     * @return the converter name
+     */
+    public String getName();
+
+}

src/main/java/com/drtshock/playervaults/util/Lang.java

@@ -1,4 +1,4 @@
-/* 
+/*
  * Copyright (C) 2013 drtshock
  *
  * This program is free software: you can redistribute it and/or modify
@@ -45,7 +45,9 @@ public enum Lang {
     EXISTING_VAULTS("existing-vaults", "&f%p has vaults: &a%v"),
     VAULT_TITLE("vault-title", "&4Vault #%number"),
     OPEN_WITH_SIGN("open-with-sign", "&fOpening vault &a%v &fof &a%p"),
-    NO_PLAYER_FOUND("no-player-found", "&cCannot find player &a%p");
+    NO_PLAYER_FOUND("no-player-found", "&cCannot find player &a%p"),
+    CONVERT_PLUGIN_NOT_FOUND("plugin-not-found", "&cNo converter found for that plugin"),
+    CONVERT_COMPLETE("conversion-complete", "&aConverted %converted players to PlayerVaults");
 
     private String path;
     private String def;