Add %volume% variable to get the number of blocks in a region

- Works properly for polygon regions

AreaShop/src/main/java/me/wiefferink/areashop/AreaShop.java

@@ -96,6 +96,7 @@ public final class AreaShop extends JavaPlugin implements AreaShopInterface {
 	public static final String tagWidth = "width"; // x-axis
 	public static final String tagHeight = "height"; // y-axis
 	public static final String tagDepth = "depth"; // z-axis
+	public static final String tagVolume = "volume"; // Number of blocks in the region (accounting for polygon regions)
 	public static final String tagTimeLeft = "timeleft";
 	public static final String tagClicker = "clicker";
 	public static final String tagResellPrice = "resellprice";
@@ -516,6 +517,19 @@ public final class AreaShop extends JavaPlugin implements AreaShopInterface {
 		return economy.getProvider();
 	}
 
+	/**
+	 * Get the Vault permissions provider.
+	 * @return Vault permissions provider
+	 */
+	public net.milkbowl.vault.permission.Permission getPermissionProvider() {
+		RegisteredServiceProvider<net.milkbowl.vault.permission.Permission> permissionProvider = getServer().getServicesManager().getRegistration(net.milkbowl.vault.permission.Permission.class);
+		if (permissionProvider == null || permissionProvider.getProvider() == null) {
+			error("There is no permission plugin that supports Vault, make sure you have a Vault-compatible permissions plugin installed");
+			return null;
+		}
+		return permissionProvider.getProvider();
+	}
+
 	/**
 	 * Method to get the FileManager (loads/save regions and can be used to get regions).
 	 * @return The fileManager

AreaShop/src/main/java/me/wiefferink/areashop/regions/GeneralRegion.java

@@ -578,6 +578,8 @@ public abstract class GeneralRegion implements GeneralRegionInterface, Comparabl
 				return getLandlordName();
 			case AreaShop.tagLandlordUUID:
 				return getLandlord();
+			case AreaShop.tagVolume:
+				return getRegion().volume();
 
 			// Date/time
 			case AreaShop.tagEpoch:

AreaShop/src/main/resources/config.yml

@@ -136,6 +136,7 @@ maximumTries: 50000
 # %untilshort%     The end time of a rent formatted as configured with 'timeFormatSign'.
 # %width%          The width of the region (number of blocks on the x-axis).
 # %depth%          The depth of the region (number of blocks on the z-axis).
+# %volume%         The number of blocks in a region (accounting for polygon shaped regions).
 # %height%         The height of the region (number of blocks on the y-axis).
 # %timeleft%       The time left on the rent (uses the unit of time that fits best, minutes used from 121 seconds till 120 minutes).
 # %clicker%        The name of the player that clicked the sign (only to be used in the signProfiles section).