Replace IP-based auth with XenForo OAuth2

Also, resolves the long standing issues #2 and #3

src/main/java/dev/plex/logging/Log.java

@@ -4,23 +4,93 @@ import dev.plex.HTTPDModule;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import org.bukkit.Bukkit;
-import org.bukkit.ChatColor;
+
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
 
 public class Log
 {
+    private static final DateTimeFormatter STAMP = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss.SSS z");
+
+    private static BufferedWriter writer;
+    private static File writerTarget;
+
     public static void log(String message, Object... strings)
+    {
+        String formatted = format(message, strings);
+        writeFile(formatted);
+        if (HTTPDModule.moduleConfig != null && HTTPDModule.moduleConfig.getBoolean("server.logging.console", false))
+        {
+            Bukkit.getConsoleSender().sendMessage(Component.text("[Plex HTTPD] ").color(NamedTextColor.DARK_AQUA).append(Component.text(formatted).color(NamedTextColor.GRAY)));
+        }
+    }
+
+    public static synchronized void shutdown()
+    {
+        if (writer != null)
+        {
+            try
+            {
+                writer.flush();
+                writer.close();
+            }
+            catch (IOException ignored) {}
+            writer = null;
+            writerTarget = null;
+        }
+    }
+
+    private static String format(String message, Object... strings)
     {
         for (int i = 0; i < strings.length; i++)
         {
-            if (message.contains("{" + i + "}"))
+            String token = "{" + i + "}";
+            if (message.contains(token))
             {
-                message = message.replace("{" + i + "}", strings[i].toString());
+                message = message.replace(token, strings[i] == null ? "null" : strings[i].toString());
             }
         }
+        return message;
+    }
 
-        if (HTTPDModule.moduleConfig.getBoolean("server.logging"))
+    private static synchronized void writeFile(String formatted)
+    {
+        if (HTTPDModule.moduleConfig == null) return;
+        if (!HTTPDModule.moduleConfig.getBoolean("server.logging.file", true)) return;
+        File target = HTTPDModule.getAccessLogFile();
+        if (target == null) return;
+        if (writer == null || !target.equals(writerTarget))
         {
-            Bukkit.getConsoleSender().sendMessage(Component.text("[Plex HTTPD] ").color(NamedTextColor.DARK_AQUA).append(Component.text(message).color(NamedTextColor.GRAY)));
+            try
+            {
+                if (writer != null) writer.close();
+                target.getParentFile().mkdirs();
+                writer = new BufferedWriter(new FileWriter(target, true));
+                writerTarget = target;
+            }
+            catch (IOException e)
+            {
+                Bukkit.getLogger().warning("[Plex HTTPD] Failed to open access log " + target + ": " + e.getMessage());
+                writer = null;
+                writerTarget = null;
+                return;
+            }
+        }
+        try
+        {
+            writer.write(STAMP.format(ZonedDateTime.now()));
+            writer.write(' ');
+            writer.write(formatted);
+            writer.newLine();
+            writer.flush();
+        }
+        catch (IOException e)
+        {
+            Bukkit.getLogger().warning("[Plex HTTPD] Failed to write access log: " + e.getMessage());
         }
     }
 }