88 lines
3.3 KiB
Java
88 lines
3.3 KiB
Java
package net.knarcraft.stargate.utility;
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import net.knarcraft.stargate.Stargate;
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import org.bukkit.scheduler.BukkitScheduler;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.URL;
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import java.util.logging.Level;
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/**
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* The update checker is responsible for looking for new updates
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*/
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public final class UpdateChecker {
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private final static String APIResourceURL = "https://api.spigotmc.org/legacy/update.php?resource=97784";
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private final static String updateNotice = "A new update is available: %s (You are still on %s)";
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private UpdateChecker() {
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}
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/**
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* Checks if there's a new update available, and alerts the user if necessary
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*/
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public static void checkForUpdate() {
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BukkitScheduler scheduler = Stargate.getInstance().getServer().getScheduler();
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scheduler.runTaskAsynchronously(Stargate.getInstance(), UpdateChecker::queryAPI);
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}
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/**
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* Queries the spigot API to check for a newer version, and informs the user
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*/
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private static void queryAPI() {
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try {
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InputStream inputStream = new URL(APIResourceURL).openStream();
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BufferedReader reader = FileHelper.getBufferedReaderFromInputStream(inputStream);
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//There should only be one line of output
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String newVersion = reader.readLine();
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reader.close();
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String oldVersion = Stargate.getPluginVersion();
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//If there is a newer version, notify the user
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if (isVersionHigher(oldVersion, newVersion)) {
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Stargate.getConsoleLogger().log(Level.INFO, Stargate.getBackupString("prefix") +
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getUpdateAvailableString(newVersion, oldVersion));
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Stargate.setUpdateAvailable(newVersion);
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}
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} catch (IOException e) {
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Stargate.debug("UpdateChecker", "Unable to get newest version.");
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}
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}
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/**
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* Gets the string to display to a user to alert about a new update
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*
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* @param newVersion <p>The new available plugin version</p>
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* @param oldVersion <p>The old (current) plugin version</p>
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* @return <p>The string to display</p>
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*/
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public static String getUpdateAvailableString(String newVersion, String oldVersion) {
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return String.format(updateNotice, newVersion, oldVersion);
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}
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/**
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* Decides whether one version number is higher than another
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*
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* @param oldVersion <p>The old version to check</p>
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* @param newVersion <p>The new version to check</p>
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* @return <p>True if the new version is higher than the old one</p>
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*/
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public static boolean isVersionHigher(String oldVersion, String newVersion) {
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String[] oldVersionParts = oldVersion.split("\\.");
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String[] newVersionParts = newVersion.split("\\.");
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int versionLength = Math.max(oldVersionParts.length, newVersionParts.length);
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for (int i = 0; i < versionLength; i++) {
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int oldVersionNumber = oldVersionParts.length > i ? Integer.parseInt(oldVersionParts[i]) : 0;
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int newVersionNumber = newVersionParts.length > i ? Integer.parseInt(newVersionParts[i]) : 0;
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if (newVersionNumber != oldVersionNumber) {
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return newVersionNumber > oldVersionNumber;
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}
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}
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return false;
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}
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}
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