Add bisect hosting - auto premium

src/main/java/me/libraryaddict/disguise/utilities/plugin/BisectHosting.java

@@ -0,0 +1,91 @@
+package me.libraryaddict.disguise.utilities.plugin;
+
+import me.libraryaddict.disguise.LibsDisguises;
+import me.libraryaddict.disguise.utilities.LibsPremium;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import java.io.*;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+/**
+ * Created by libraryaddict on 6/03/2020.
+ */
+public class BisectHosting {
+    public boolean isBisectHosted(String pluginName) {
+        File configFile = new File("plugins/" + pluginName + "/internal-config.yml");
+        boolean claimedHosted = false;
+
+        if (configFile.exists()) {
+            YamlConfiguration configuration = YamlConfiguration.loadConfiguration(configFile);
+
+            if (configuration.contains("Bisect-Hosted")) {
+                claimedHosted = configuration.getBoolean("Bisect-Hosted");
+                // If not hosted by bisect
+                if (!claimedHosted) {
+                    return false;
+                }
+            }
+        }
+
+        String ip = Bukkit.getIp();
+        boolean hostedBy = false;
+
+        if (ip.matches("((25[0-5]|(2[0-4]|1[0-9]|[1-9]|)[0-9])(\\.(?!$)|$)){4}")) {
+            try {
+                ip = getFinalURL("http://" + ip);
+
+                if (ip.startsWith("https://www.bisecthosting.com/")) {
+                    hostedBy = true;
+                }
+            }
+            catch (IOException ignored) {
+            }
+        }
+
+        // If config doesn't exist, or it's not a bisect server
+        if (!configFile.exists()) {
+
+            if (!configFile.getParentFile().exists()) {
+                configFile.getParentFile().mkdirs();
+            }
+
+            try (PrintWriter writer = new PrintWriter(configFile, "UTF-8")) {
+                // This setting is if the server should check if you are using Bisect Hosting",
+                writer.write("# If you're using Bisect Hosting, this will tell the server to enable premium for free!");
+                writer.write(
+                        "\n# However if you're not using Bisect Hosting, this is false so the server won't waste " +
+                                "time");
+                writer.write(
+                        "\n# Coupon 'libraryaddict' for 25% off your first invoice on any of their gaming servers");
+                writer.write("\nBisect-Hosted: " + hostedBy);
+            }
+            catch (FileNotFoundException | UnsupportedEncodingException e) {
+                e.printStackTrace();
+            }
+        } else if (claimedHosted) {
+            // Just a small message for those who tried to enable it
+            LibsDisguises.getInstance().getLogger().severe("Check for Bisect Hosting failed! Connection error?");
+        }
+
+        return hostedBy;
+    }
+
+    private String getFinalURL(String url) throws IOException {
+        HttpURLConnection con = (HttpURLConnection) new URL(url).openConnection();
+        con.setInstanceFollowRedirects(false);
+        // Short as this shouldn't take long
+        con.setReadTimeout(2500);
+        con.setConnectTimeout(2500);
+        con.connect();
+        con.getInputStream();
+
+        if (con.getResponseCode() == HttpURLConnection.HTTP_MOVED_PERM ||
+                con.getResponseCode() == HttpURLConnection.HTTP_MOVED_TEMP) {
+            return con.getHeaderField("Location");
+        }
+
+        return url;
+    }
+}