feat: read images from data dir and map to hostname in filename

src/main/java/com/leohabrom/velocity/customServerIcon/CustomServerIcon.java

@@ -3,31 +3,75 @@ package com.leohabrom.velocity.customServerIcon;
 import com.google.inject.Inject;
 import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
 import com.velocitypowered.api.event.Subscribe;
-import com.velocitypowered.api.event.proxy.ProxyPingEvent;
 import com.velocitypowered.api.plugin.Plugin;
+import com.velocitypowered.api.plugin.annotation.DataDirectory;
+import com.velocitypowered.api.proxy.ProxyServer;
 import org.slf4j.Logger;
 
-import java.net.InetSocketAddress;
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.util.concurrent.ConcurrentHashMap;
 
 
 @Plugin(id = "custom-server-icon", name = "Custom Server Icon", version = "1.0-SNAPSHOT",
-        url = "https://", description = "I did it!", authors = {"Me"})
+        url = "https://git.leohabrom.com/Jinx/velocity-custom-server-icon", description = "Velocity Plugin to set custom icons for different hostnames", authors = {"Leo Habrom"})
 public class CustomServerIcon {
 
+    private final ProxyServer server;
+    private final Logger logger;
+    private final Path dataDirectory;
+    private final ConcurrentHashMap<String, BufferedImage> customIcons = new ConcurrentHashMap<>();
+
     @Inject
-    private Logger logger;
+    public CustomServerIcon(ProxyServer server, Logger logger, @DataDirectory Path dataDirectory) {
+        this.server = server;
+        this.logger = logger;
+        this.dataDirectory = dataDirectory;
+
+        logger.info("Hello from Custom Server Icon");
+    }
 
     @Subscribe
     public void onProxyInitialization(ProxyInitializeEvent event) {
-        System.out.println("Hello from Custom Server Icon");
-        // Plugin initialization logic goes here
+        try {
+            File dataDir = dataDirectory.toFile();
+            if ((!dataDir.exists() && !dataDir.mkdirs()) || !dataDir.isDirectory()) {
+                logger.warn("couldn't create data directory, disabling plugin!");
+                return;
+            }
+            File[] files = dataDir.listFiles((dir, name) -> name.endsWith(".png"));
+            if (files == null) {
+                logger.warn("couldn't read files in the data directory, disabling plugin!");
+                return;
+            }
+            logger.info("Found {} images in the data directory",files.length);
+            for (File file : files) {
+                String hostname = file.getName().substring(0,file.getName().length()-4);
+                try {
+                    BufferedImage image = ImageIO.read(file);
+                    if (image != null) {
+                        if (image.getWidth() != 64 || image.getHeight() != 64) {
+                            logger.warn("image {} is not 64x64 pixels, skipping",file.getName());
+                            continue;
+                        }
+                        customIcons.put(hostname,image);
+                        logger.info("added custom icon for {}",hostname);
+                    }
+                } catch (IOException e) {
+                    logger.warn("couldn't read image {}", file.getName());
+                }
             }
 
-    @Subscribe
-    public void onProxyPing(ProxyPingEvent event) {
-        InetSocketAddress address = event.getConnection().getVirtualHost().orElse(null);
-        if (address != null) {
-            System.out.println(address.getHostName());
+        } catch (SecurityException securityException) {
+            logger.warn("no read access in the data directory, disabling plugin!");
+            return;
         }
+
+
+        server.getEventManager().register(this, new PluginListener(logger,customIcons));
+        logger.info("Registered Plugin");
     }
 }

src/main/java/com/leohabrom/velocity/customServerIcon/PluginListener.java

@@ -0,0 +1,38 @@
+package com.leohabrom.velocity.customServerIcon;
+
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.proxy.ProxyPingEvent;
+import com.velocitypowered.api.proxy.ProxyServer;
+import com.velocitypowered.api.util.Favicon;
+import org.slf4j.Logger;
+
+import java.awt.image.BufferedImage;
+import java.net.InetSocketAddress;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class PluginListener {
+
+    private final Logger logger;
+    private final ConcurrentHashMap<String, BufferedImage> customIcons;
+
+
+    public PluginListener(Logger logger, ConcurrentHashMap<String,BufferedImage> customIcons) {
+        this.logger = logger;
+        this.customIcons = customIcons;
+    }
+
+    @Subscribe
+    public void onProxyPing(ProxyPingEvent event) {
+        InetSocketAddress address = event.getConnection().getVirtualHost().orElse(null);
+        if (address != null) {
+            logger.info("Received ping to: {} from: {}", address.getHostName(), event.getConnection().getRemoteAddress().getAddress());
+            String host = address.getHostName();
+            customIcons.forEach((customHost,image)-> {
+                if (customHost.equalsIgnoreCase(host) && image != null && image.getHeight() == 64 && image.getWidth() == 64) {
+                    logger.info("Set custom image for host: {}",host);
+                    event.setPing(event.getPing().asBuilder().favicon(Favicon.create(image)).build());
+                }
+            });
+        }
+    }
+}