IrcMessage.java

package net.rymate.irc.parser;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Port of the WinIRC parser to Java
 * 
 * Created by rymate1234 on 15/08/2016.
 */
 
public class IrcMessage {
    private final Prefix prefix;
    private final Trailing trailing;
    private final Command command;
    private String originalMessage;
    private String serverTime;

    public IrcMessage(String message) {
        // remove colours first
        String coloursRegex = "[\\x02\\x1f\\x16\\x0f]|\\x03\\d{0,2}(?:,\\d{0,2})?";
        message = message.replaceFirst(coloursRegex, "");

        List<String> lineSplit = Arrays.asList(message.split(" "));

        if (message.startsWith("@")) {
            String timeVar = lineSplit.get(0);
            serverTime = timeVar.replace("@time=", "");
            lineSplit.remove(0);
        }

        message = String.join(" ", lineSplit);
        this.originalMessage = message;
        this.prefix = new Prefix(message);
        this.trailing = new Trailing(message);
        this.command = new Command(message, this.getPrefix(), this.getTrailing());
    }

    public String getOriginalMessage() {
        return originalMessage;
    }

    public String getServerTime() {
        return serverTime;
    }

    public Prefix getPrefix() {
        return prefix;
    }

    public Trailing getTrailing() {
        return trailing;
    }

    public Command getCommand() {
        return command;
    }

    public class Prefix {
        /**
         * The original message
         */
        private String originalMessage;

        private String prefix;
        private String nickname;
        private String username;
        private String hostname;
        private boolean user;
        private int index;

        /**
         * Initializes a new instance of the
         * {@link #Prefix}
         * class.
         *
         * @param message The message.
         */
        public Prefix(String message) {
            this.originalMessage = message;
            if (!this.getIsPrefixed()) {
                return;
            }

            index = message.indexOf(" ");
            this.setPrefix(message.substring(1, index - 1));

            String[] userHostArray = this.getPrefix().split("(!)|(@)");

            if (userHostArray.length > 1) {
                this.user = true;
                this.nickname = userHostArray[0];
                this.username = userHostArray[1];
                this.hostname = userHostArray[2];
            }

        }

        public boolean getIsPrefixed() {
            return this.originalMessage.startsWith(":");
        }

        public String getPrefix() {
            return prefix;
        }

        public void setPrefix(String prefix) {
            this.prefix = prefix;
        }

        public String getNickname() {
            return nickname;
        }

        public void setNickname(String nickname) {
            this.nickname = nickname;
        }

        public String getUsername() {
            return username;
        }

        public void setUsername(String username) {
            this.username = username;
        }

        public String getHostname() {
            return hostname;
        }

        public void setHostname(String hostname) {
            this.hostname = hostname;
        }

        public void setUser(boolean user) {
            this.user = user;
        }

        public boolean isUser() {
            return user;
        }

        public int getIndex() {
            return index;
        }
    }

    public class Trailing {
        private final boolean hasTrail;
        private int trailIndex;
        private String content;

        public Trailing(String message) {
            String regex = "[\\x00-\\x07\\x0B\\x0C\\x0E-\\x1F\\x26]";
            message = message.replaceAll(regex, "");

            trailIndex = message.indexOf(" :");

            if (trailIndex > 0) {
                this.content = message.substring(trailIndex + 2);
            } else {
                trailIndex = message.length();
            }

            this.hasTrail = (trailIndex > 0 && trailIndex < message.length());
        }

        public String getContent() {
            return content;
        }

        public boolean isHasTrail() {
            return hasTrail;
        }

        public int getTrailIndex() {
            return trailIndex;
        }
    }

    public class Command {
        private ArrayList<String> parameters;
        private String command;

        public Command(String message, Prefix prefix, Trailing trailing) {
            int endIndex = Math.min(prefix.getIndex() + 1 + trailing.getTrailIndex() - prefix.getIndex() - 1, message.length());

            String[] commandAndParameters = message.substring(prefix.getIndex() + 1, endIndex).split(" ");

            this.command = commandAndParameters[0];
            // If the command as args, then they compose the rest of the collection.
            if (commandAndParameters.length > 1) {
                this.parameters = new ArrayList<String>(Arrays.asList(commandAndParameters));
                this.parameters.remove(1);
            }

        }

        public String getCommand() {
            return command;
        }

        public boolean is(String other) {
            return command.equals(other);
        }

        public List<String> getParameters() {
            return parameters;
        }
    }
}