Include coin.png as a plugin resource

src/main/java/io/github/townyadvanced/townyprovinces/jobs/map_display/DisplayProvincesOnBlueMapAction.java

@@ -48,15 +48,15 @@ public DisplayProvincesOnBlueMapAction() {
 
 	@Override
 	void reloadAction() {
+		BufferedImage configIcon = TownyProvincesSettings.getTownCostsIcon();
 
-		if (TownyProvincesSettings.getTownCostsIcon() == null) {
-			throw new RuntimeException("Town Costs Icon URL is not a valid image link");
+		if (configIcon == null) {
+			throw new RuntimeException("Town Costs Icon is not a valid image");
 		}
 
 		BlueMapAPI.getInstance().ifPresent(e -> {
 			Path assetsFolder = e.getWebApp().getWebRoot().resolve("assets");
 			try (OutputStream out = Files.newOutputStream(assetsFolder.resolve("province.png"), StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING)) {
-				BufferedImage configIcon = TownyProvincesSettings.getTownCostsIcon();
 				BufferedImage resizedIcon = new BufferedImage(
 					TownyProvincesSettings.getTownCostsIconWidth(),
 					TownyProvincesSettings.getTownCostsIconHeight(),

src/main/java/io/github/townyadvanced/townyprovinces/jobs/map_display/DisplayProvincesOnDynmapAction.java

@@ -16,6 +16,7 @@
 import org.dynmap.markers.MarkerSet;
 
 import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -45,8 +46,10 @@ public DisplayProvincesOnDynmapAction() {
 
 	@Override
 	void reloadAction() {
-		if (TownyProvincesSettings.getTownCostsIcon() == null) {
-			throw new RuntimeException("Town Costs Icon URL is not a valid image link");
+		BufferedImage configIcon = TownyProvincesSettings.getTownCostsIcon();
+
+		if (configIcon == null) {
+			throw new RuntimeException("Town Costs Icon is not a valid image");
 		}
 
 		final MarkerIcon oldMarkerIcon = markerapi.getMarkerIcon("provinces_costs_icon");
@@ -56,7 +59,7 @@ void reloadAction() {
 
 		ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
 		try {
-			ImageIO.write(TownyProvincesSettings.getTownCostsIcon(), "png", outputStream);
+			ImageIO.write(configIcon, "png", outputStream);
 		} catch (IOException ex) {
 			TownyProvinces.severe("Failed to write BlueMap Marker Icon as png file!");
 			throw new RuntimeException(ex);

src/main/java/io/github/townyadvanced/townyprovinces/jobs/map_display/DisplayProvincesOnPl3xMapV3Action.java

@@ -26,6 +26,7 @@
 import net.pl3x.map.core.markers.option.Stroke;
 import net.pl3x.map.core.world.World;
 
+import java.awt.image.BufferedImage;
 import java.util.*;
 import java.util.List;
 
@@ -127,12 +128,14 @@ private SimpleLayer createLayer(String layerKey, String layerName, boolean hideB
 
 	@Override
 	void reloadAction() {
-		if (TownyProvincesSettings.getTownCostsIcon() == null) {
-			throw new RuntimeException("Town Costs Icon URL is not a valid image link");
+		BufferedImage configIcon = TownyProvincesSettings.getTownCostsIcon();
+
+		if (configIcon == null) {
+			throw new RuntimeException("Town Costs Icon is not a valid image");
 		}
 
 		Pl3xMap.api().getIconRegistry().register(new IconImage(
-			"provinces_costs_icon", TownyProvincesSettings.getTownCostsIcon(), "png"));
+			"provinces_costs_icon", configIcon, "png"));
 	}
 
 	@Override

src/main/java/io/github/townyadvanced/townyprovinces/settings/ConfigNodes.java

@@ -204,13 +204,14 @@ public enum ConfigNodes {
 		"# |                  TOWN COSTS ICON                     | #",
 		"# +------------------------------------------------------+ #",
 		""),
-	MAP_TOWN_COSTS_ICON_URL(
-		"map_integration.town_costs_icon.url",
-		"https://cdn-icons-png.flaticon.com/512/9729/9729309.png", "",
-		"# Icon for the town costs. This must be a valid image URL.",
+	MAP_TOWN_COSTS_ICON_PATH(
+		"map_integration.town_costs_icon.path",
+		"", "",
+		"# Custom icon for the town costs. This must be a valid URL, or a filepath in TownyProvinces folder.",
+		"# Leave this empty to use the included default coin icon.",
 		"# Default coin icon created by Md Tanvirul Haque - Flaticon",
 		"# https://www.flaticon.com/free-icon/dollar_9729309"
-		),
+		), 
 	MAP_TOWN_COSTS_ICON_HEIGHT(
 		"map_integration.town_costs_icon.height",
 		"35",

src/main/java/io/github/townyadvanced/townyprovinces/settings/TownyProvincesSettings.java

@@ -15,8 +15,11 @@
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -256,20 +259,49 @@ public static boolean isBiomeCostAdjustmentsEnabled() {
 	public static double getBiomeCostAdjustmentsHotLand() { return Settings.getDouble(ConfigNodes.BIOME_COST_ADJUSTMENTS_HOT_LAND); }
 	public static double getBiomeCostAdjustmentsColdLand() { return Settings.getDouble(ConfigNodes.BIOME_COST_ADJUSTMENTS_COLD_LAND); }
 
-	public static @Nullable BufferedImage getTownCostsIcon() {
-		URL imageURL;
+	private static BufferedImage getFallbackTownCostsIcon() {
 		try {
-			imageURL = new URL(Settings.getString(ConfigNodes.MAP_TOWN_COSTS_ICON_URL));
-			return ImageIO.read(imageURL);
-		} catch (MalformedURLException e) {
-			TownyProvinces.severe("Error: Invalid Town Costs Icon URL in configuration file.");
-			return null;
+			InputStream imageStream = TownyProvinces.getPlugin().getResource("coin.png");
+			if (imageStream == null) {
+				TownyProvinces.severe("Error: Fallback Town Costs Icon is missing from plugin jar file.");
+				return null;
+			}
+			return ImageIO.read(imageStream);
 		} catch (IOException e) {
-			TownyProvinces.severe("Error: Failed to load Town Costs Icon from URL provided in configuration file.");
+			TownyProvinces.severe("Error: Failed to load fallback Town Costs Icon from plugin jar file.");
 			return null;
 		}
 	}
 
+	public static @Nullable BufferedImage getTownCostsIcon() {
+		String imageString = Settings.getString(ConfigNodes.MAP_TOWN_COSTS_ICON_PATH);
+		if (imageString.isEmpty()) return getFallbackTownCostsIcon();
+		if (imageString.startsWith("https://") || imageString.startsWith("http://")) {
+			URL imageURL;
+			try {
+				imageURL = new URL(imageString);
+				return ImageIO.read(imageURL);
+			} catch (MalformedURLException e) {
+				TownyProvinces.severe("Error: Invalid Town Costs Icon URL in configuration file.");
+				return getFallbackTownCostsIcon();
+			} catch (IOException e) {
+				TownyProvinces.severe("Error: Failed to load Town Costs Icon from URL provided in configuration file.");
+				return getFallbackTownCostsIcon();
+			}
+		} else {
+			try {
+				Path imagePath = TownyProvinces.getPlugin().getDataFolder().toPath().resolve(imageString);
+				return ImageIO.read(imagePath.toFile());
+			} catch (InvalidPathException e) {
+				TownyProvinces.severe("Error: Invalid Town Costs Icon filepath in configuration file.");
+				return getFallbackTownCostsIcon();
+			} catch (IOException e) {
+				TownyProvinces.severe("Error: Failed to load Town Costs Icon from filepath provided in configuration file.");
+				return getFallbackTownCostsIcon();
+			}
+        }
+	}
+
 	public static int getTownCostsIconWidth() { return Settings.getInt(ConfigNodes.MAP_TOWN_COSTS_ICON_WIDTH); }
 
 	public static int getTownCostsIconHeight() { return Settings.getInt(ConfigNodes.MAP_TOWN_COSTS_ICON_HEIGHT); }