Factions3/src/main/java/com/massivecraft/factions/entity/FactionColls.java

package com.massivecraft.factions.entity;

import java.io.File;
import java.lang.reflect.Type;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import com.massivecraft.factions.Const;
import com.massivecraft.factions.Factions;
import com.massivecraft.massivecore.Aspect;
import com.massivecraft.massivecore.MassiveCore;
import com.massivecraft.massivecore.util.DiscUtil;
import com.massivecraft.massivecore.util.MUtil;
import com.google.gson.reflect.TypeToken;

public class FactionColls extends XColls<FactionColl, Faction>
{
	// -------------------------------------------- //
	// INSTANCE & CONSTRUCT
	// -------------------------------------------- //
	
	private static FactionColls i = new FactionColls();
	public static FactionColls get() { return i; }
	
	// -------------------------------------------- //
	// OVERRIDE: COLLS
	// -------------------------------------------- //
	
	@Override
	public FactionColl createColl(String collName)
	{
		return new FactionColl(collName);
	}

	@Override
	public Aspect getAspect()
	{
		return Factions.get().getAspect();
	}
	
	@Override
	public String getBasename()
	{
		return Const.COLLECTION_FACTION;
	}
	
	@Override
	public void init()
	{
		super.init();
		
		this.migrate();
	}
	
	// This method is for the 1.8.X --> 2.0.0 migration
	public void migrate()
	{
		// Create file objects
		File oldFile = new File(Factions.get().getDataFolder(), "factions.json");
		File newFile = new File(Factions.get().getDataFolder(), "factions.json.migrated");
		
		// Already migrated?
		if ( ! oldFile.exists()) return;
		
		// Faction ids /delete
		// For simplicity we just drop the old special factions.
		// They will be replaced with new autogenerated ones per universe.
		Set<String> factionIdsToDelete = MUtil.set("0", "-1", "-2");
		
		// Read the file content through GSON. 
		Type type = new TypeToken<Map<String, Faction>>(){}.getType();
		Map<String, Faction> id2faction = Factions.get().gson.fromJson(DiscUtil.readCatch(oldFile), type);
		
		// The Coll
		FactionColl coll = this.getForUniverse(MassiveCore.DEFAULT);
		
		// Set the data
		for (Entry<String, Faction> entry : id2faction.entrySet())
		{
			String factionId = entry.getKey();
			if (factionIdsToDelete.contains(factionId)) continue;
			Faction faction = entry.getValue();
			coll.attach(faction, factionId);
		}
		
		// Mark as migrated
		oldFile.renameTo(newFile);
	}
	
	// -------------------------------------------- //
	// INDEX
	// -------------------------------------------- //
	
	public void reindexUPlayers()
	{
		for (FactionColl coll : this.getColls())
		{
			coll.reindexUPlayers();
		}
	}
	
}