minecraft-kajetans-mod/src/main/java/me/km/chatmanager/ChatManager.java

package me.km.chatmanager;

import me.km.api.Module;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.UUID;
import java.util.stream.Collectors;
import me.km.permissions.Permission;
import me.km.permissions.Permissions;
import net.minecraft.command.ICommandSender;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.text.TextFormatting;

public class ChatManager extends Module
{    
    private final HashMap<Integer, ArrayList<Rank>> ranks;
    private final HashMap<UUID, String> fakeRank;
    private final String fallback;
    private final HashMap<UUID, HashSet<String>> playerRanks;

    public ChatManager(String mname, String prefix, TextFormatting color) 
    {
        super(mname, prefix, color);
        ranks = new HashMap<>();
        fakeRank = new HashMap<>(); 
        fallback = "§8Geist";
        playerRanks = new HashMap<>();
    }

    // -----------------------------------------------------------------------------------
    // Rank-Handling
    // -----------------------------------------------------------------------------------

    /** Registers a rank by its permission, group and name. The idea is that ranks in the 
     * same group overwrite themselves by picking the first match in the list.
     *
     * @param name the name of the rank to identify it
     * @param group the id of the rank group
     * @param text the text, which will be shown for the rank
     */
    public void registerRank(String name, int group, String text)
    {
        ArrayList<Rank> list = ranks.get(group);
        if(list == null)
        {
            list = new ArrayList<>();
            ranks.put(group, list);
        }
        list.add(new Rank(name, text));
    }
    
    /** Registers a rank for a players uuid
     *
     * @param uuid a uuid of a player
     * @param rank the rank, which should be registered
     */
    public void registerPlayerRank(UUID uuid, String rank)
    {
        HashSet<String> set = playerRanks.get(uuid);
        if(set == null)
        {
            set = new HashSet<>();
        }
        set.add(rank);
    }
    
    /** Gets all texts of the players ranks
     *
     * @param p a player
     * @return rank texts as list, the list will never be empty due to  fallback
     */
    public ArrayList<String> getRanks(EntityPlayer p)
    {
        HashSet<String> pRanks = playerRanks.get(p.getUniqueID());
        if(pRanks != null)
        {
            ArrayList<String> list = ranks.values().stream()
                    .map(l ->
                    {
                        for(Rank r : l)
                        {
                            if(pRanks.contains(r.getName()))
                            {
                                return r.getName();
                            }
                        }
                        return null;
                    })
                    .filter(s -> s != null)
                    .collect(Collectors.toCollection(ArrayList::new));
            if(list.isEmpty())
            {
                list.add(fallback);        
            }
            return list;
        }
        else
        {
            ArrayList<String> list = new ArrayList<>();
            list.add(fallback);
            return list;
        }
    }
    
    /** Removes all ranks and their player registry from the cache
     *
     */
    public void clearRanks()
    {
        ranks.clear();
        playerRanks.clear();
    }
    
    /** Gets the players display name and its ranks
     *
     * @param p a player
     * @return players display name and ranks collected with specific format
     */
    public String getFullName(EntityPlayer p)
    {
        String fake = fakeRank.get(p.getUniqueID());
        if(fake != null)
        {
            return fake + " " + p.getDisplayNameString();
        }
        return getRanks(p).stream().collect(Collectors.joining("§r][", "[", "§r] " + p.getDisplayNameString()));
    }
    
    // -------------------------------------------------------------------------
    // Fakeranks
    // -------------------------------------------------------------------------
    
    public void addFakeRank(EntityPlayer p, String rank)
    {
        fakeRank.put(p.getUniqueID(), rank);
    }
    
    public String getFakeRank(EntityPlayer p)
    {
        return fakeRank.get(p.getUniqueID());
    }

    public void removeFakeRank(EntityPlayer p)
    {
        fakeRank.remove(p.getUniqueID());
    }
    
    // -------------------------------------------------------------------------
    // Text-Coloring-Helper
    // -------------------------------------------------------------------------
    
    public static String colorMessage(String text, ICommandSender cs) 
    {
        text = text.replace("&k", "");
        if(Permission.has(cs, Permissions.USE_COLOR))
        {
            text = text.replace("&", "§");
            return text;
        }
        text = text.replaceAll("&.", "");
        return text;
    }
}