Get versions and jar URL from BetaCraft's version_list.txt

1 files changed, 79 insertions, 0 deletions

diff --git a/src/net/minecraft/GameVersion.java b/src/net/minecraft/GameVersion.java
new file mode 100644
index 0000000..7698b5d
--- /dev/null
+++ b/src/net/minecraft/GameVersion.java
@@ -0,0 +1,79 @@
+package net.minecraft;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.time.Instant;
+import java.util.Scanner;
+
+public class GameVersion {
+	public String name;
+	public String desc;
+	public Instant compiledOn;
+	public Instant releasedOn;
+
+	public URL gameJarUrl;
+	public String proxyArgs;
+
+	private boolean infoDownloaded = false;
+
+	public GameVersion(String name, String desc, long compileTimestamp, long releaseTimestamp) {
+		this.name = name;
+		this.desc = desc;
+		this.compiledOn = Instant.ofEpochMilli(compileTimestamp);
+		this.releasedOn = Instant.ofEpochMilli(releaseTimestamp);
+	}
+
+	public void downloadInfo() throws IOException {
+		URL infoUrl = new URL("http://files.betacraft.uk/launcher/assets/jsons/" + name + ".info");
+		Scanner scanner = new Scanner(infoUrl.openStream(), "UTF-8");
+		while (scanner.hasNextLine()) {
+			String[] keyValueList = scanner.nextLine().split(":", 2);
+
+			if (keyValueList.length < 2)
+				continue;
+
+			String key = keyValueList[0];
+			String value = keyValueList[1];
+
+			switch (key) {
+				case "url":
+					gameJarUrl = new URL(value);
+					break;
+				case "proxy-args":
+					proxyArgs = value;
+					break;
+			}
+		}
+		infoDownloaded = true;
+	}
+
+	public boolean hasFullInfo() {
+		return infoDownloaded;
+	}
+
+	public boolean isPreleaseOrDemo() {
+		boolean isDemo = name.contains("demo");
+		boolean isPrerelease = name.contains("pre") || name.contains("test") || name.contains("w");
+		boolean isClassic = name.startsWith("c");
+		return isDemo || isPrerelease || isClassic;
+	}
+
+	public boolean isSameVersion(File versionFile) throws IOException {
+		DataInputStream dis = new DataInputStream(Files.newInputStream(versionFile.toPath()));
+		String version = dis.readUTF();
+		dis.close();
+
+		long versionTimestamp = Long.parseLong(version);
+		return releasedOn.getEpochSecond() == versionTimestamp;
+	}
+
+	public void writeVersionFile(File file) throws IOException {
+		DataOutputStream dos = new DataOutputStream(Files.newOutputStream(file.toPath()));
+		dos.writeUTF(String.valueOf(releasedOn.getEpochSecond()));
+		dos.close();
+	}
+}