Rekkit/src/main/java/org/bukkit/craftbukkit/updater/AutoUpdater.java

package org.bukkit.craftbukkit.updater;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;

public class AutoUpdater {
    public static final String WARN_CONSOLE = "warn-console";
    public static final String WARN_OPERATORS = "warn-ops";

    private final BukkitDLUpdaterService service;
    private final List<String> onUpdate = new ArrayList<String>();
    private final List<String> onBroken = new ArrayList<String>();
    private final Logger log;
    private final String channel;
    private boolean enabled;
    private ArtifactDetails current = null;
    private ArtifactDetails latest = null;
    private boolean suggestChannels = true;

    public AutoUpdater(BukkitDLUpdaterService service, Logger log, String channel) {
        this.service = service;
        this.log = log;
        this.channel = channel;
    }

    public String getChannel() {
        return channel;
    }

    public boolean isEnabled() {
        return enabled;
    }

    public void setEnabled(boolean isEnabled) {
        this.enabled = isEnabled;
    }

    public boolean shouldSuggestChannels() {
        return suggestChannels;
    }

    public void setSuggestChannels(boolean suggestChannels) {
        this.suggestChannels = suggestChannels;
    }

    public List<String> getOnBroken() {
        return onBroken;
    }

    public List<String> getOnUpdate() {
        return onUpdate;
    }

    public boolean isUpdateAvailable() {
        if ((latest == null) || (current == null) || (!isEnabled())) {
            return false;
        } else {
            return latest.getCreated().after(current.getCreated());
        }
    }

    public ArtifactDetails getCurrent() {
        return current;
    }

    public ArtifactDetails getLatest() {
        return latest;
    }

    public void check(final String currentSlug) {
        if (!isEnabled()) return;

        new Thread() {
            @Override
            public void run() {
                current = service.getArtifact(currentSlug, "information about this CraftBukkit version; perhaps you are running a custom one?");
                latest = service.getArtifact("latest-" + channel, "latest artifact information");

                if (isUpdateAvailable()) {
                    if ((current.isBroken()) && (onBroken.contains(WARN_CONSOLE))) {
                        log.severe("----- Bukkit Auto Updater -----");
                        log.severe("Your version of CraftBukkit is known to be broken. It is strongly advised that you update to a more recent version ASAP.");
                        log.severe("Known issues with your version:");

                        for (String line : current.getBrokenReason().split("\n")) {
                            log.severe("> " + line);
                        }

                        log.severe("Newer version " + latest.getVersion() + " (build #" + latest.getBuildNumber() + ") was released on " + latest.getCreated() + ".");
                        log.severe("Details: " + latest.getHtmlUrl());
                        log.severe("Download: " + latest.getFile().getUrl());
                        log.severe("----- ------------------- -----");
                    } else if (onUpdate.contains(WARN_CONSOLE)) {
                        log.warning("----- Bukkit Auto Updater -----");
                        log.warning("Your version of CraftBukkit is out of date. Version " + latest.getVersion() + " (build #" + latest.getBuildNumber() + ") was released on " + latest.getCreated() + ".");
                        log.warning("Details: " + latest.getHtmlUrl());
                        log.warning("Download: " + latest.getFile().getUrl());
                        log.warning("----- ------------------- -----");
                    }
                } else if ((current != null) && (current.isBroken()) && (onBroken.contains(WARN_CONSOLE))) {
                    log.severe("----- Bukkit Auto Updater -----");
                    log.severe("Your version of CraftBukkit is known to be broken. It is strongly advised that you update to a more recent version ASAP.");
                    log.severe("Known issues with your version:");

                    for (String line : current.getBrokenReason().split("\n")) {
                        log.severe("> " + line);
                    }

                    log.severe("Unfortunately, there is not yet a newer version suitable for your server. We would advise you wait an hour or two, or try out a dev build.");
                    log.severe("----- ------------------- -----");
                } else if ((current != null) && (shouldSuggestChannels())) {
                    ArtifactDetails.ChannelDetails prefChan = service.getChannel(channel, "preferred channel details");

                    if ((prefChan != null) && (current.getChannel().getPriority() < prefChan.getPriority())) {
                        log.info("----- Bukkit Auto Updater -----");
                        log.info("It appears that you're running a " + current.getChannel().getName() + ", when you've specified in bukkit.yml that you prefer to run " + prefChan.getName() + "s.");
                        log.info("If you would like to be kept informed about new " + current.getChannel().getName() + " releases, it is recommended that you change 'preferred-channel' in your bukkit.yml to '" + current.getChannel().getSlug() + "'.");
                        log.info("With that set, you will be told whenever a new version is available for download, so that you can always keep up to date and secure with the latest fixes.");
                        log.info("If you would like to disable this warning, simply set 'suggest-channels' to false in bukkit.yml.");
                        log.info("----- ------------------- -----");
                    }
                }
            }
        }.start();
    }
}