1 files changed, 63 insertions, 3 deletions
diff --git a/src/main/java/com/redstoner/bungeeBans/Util.java b/src/main/java/com/redstoner/bungeeBans/Util.java
index b529794..001e180 100644
--- a/src/main/java/com/redstoner/bungeeBans/Util.java
+++ b/src/main/java/com/redstoner/bungeeBans/Util.java
@@ -1,19 +1,36 @@
 package com.redstoner.bungeeBans;
 
+import com.google.gson.Gson;
 import com.mojang.api.profiles.HttpProfileRepository;
 import com.mojang.api.profiles.Profile;
 
+import java.io.IOException;
+import java.net.URL;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
+import java.util.Date;
+import java.util.Scanner;
 import java.util.regex.Pattern;
 
 public class Util {
+	private static final Gson gson = new Gson();
+
 	private static final HttpProfileRepository profileRepo = new HttpProfileRepository("minecraft");
-	private static final Pattern               ipValidity  = Pattern.compile(
-			"^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])$");
+
+	private static final String undashedUuidRegex = "([0-9a-fA-F]{8})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]+)";
+	private static final String dashedUuidRegex   = "([0-9a-fA-F]{8})-([0-9a-fA-F]{4})-([0-9a-fA-F]{4})-([0-9a-fA-F]{4})-([0-9a-fA-F]+)";
+
+	private static final String ipRegex = "^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\.([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
+
+	private static final Pattern uuidValidity = Pattern.compile(dashedUuidRegex);
+	private static final Pattern ipValidity   = Pattern.compile(ipRegex);
 
 	public static String dashUUID(String uuid) {
-		return uuid.replaceFirst("([0-9a-fA-F]{8})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]{4})([0-9a-fA-F]+)", "$1-$2-$3-$4-$5");
+		return uuid.replaceFirst(undashedUuidRegex, "$1-$2-$3-$4-$5");
+	}
+
+	public static String trimUUID(String uuid) {
+		return uuid.replaceAll("-", "");
 	}
 
 	public static String getNow() {
@@ -24,7 +41,50 @@ public class Util {
 		return profileRepo.findProfilesByNames(names);
 	}
 
+	public static boolean validateUUID(String uuid) {
+		return uuidValidity.matcher(uuid).matches();
+	}
+
 	public static boolean validateIP(String ip) {
 		return ipValidity.matcher(ip).matches();
 	}
+
+	public static NameChange[] findNameChangesByUUID(String uuid) throws MojangException {
+		NameChange[] names = null;
+
+		try {
+			Scanner jsonScanner = new Scanner(
+					new URL("https://api.mojang.com/user/profiles/" + trimUUID(uuid) + "/names").openConnection().getInputStream(),
+					"UTF-8"
+			);
+
+			names = gson.fromJson(jsonScanner.next(), NameChange[].class);
+			jsonScanner.close();
+		} catch (IOException e) {
+			if (e.getMessage().contains("HTTP response code: 429")) {
+				throw new MojangException("Mojang api request limit reached! Please try again later!");
+			} else {
+				throw new MojangException(e.getMessage());
+			}
+		} catch (Exception e) {
+			throw new MojangException("Invalid UUID!");
+		}
+
+		return names;
+	}
+
+	public static class MojangException extends Exception {
+		MojangException(String message) {
+			super(message);
+		}
+	}
+
+	public static class NameChange {
+		public String name;
+		public long   changedToAt;
+
+		public Date getChangeDate() {
+			return new Date(changedToAt);
+		}
+	}
 }