Notify ShopKeepers users of unsealed brews

src/com/dre/brewery/P.java

@@ -7,6 +7,7 @@ import com.dre.brewery.filedata.LanguageReader;
 import com.dre.brewery.filedata.UpdateChecker;
 import com.dre.brewery.integration.ChestShopListener;
 import com.dre.brewery.integration.IntegrationListener;
+import com.dre.brewery.integration.ShopKeepersListener;
 import com.dre.brewery.integration.barrel.LogBlockBarrel;
 import com.dre.brewery.listeners.*;
 import com.dre.brewery.recipe.*;
@@ -135,6 +136,9 @@ public class P extends JavaPlugin {
 		if (BConfig.hasChestShop && use1_13) {
 			p.getServer().getPluginManager().registerEvents(new ChestShopListener(), p);
 		}
+		if (BConfig.hasShopKeepers) {
+			p.getServer().getPluginManager().registerEvents(new ShopKeepersListener(), p);
+		}
 
 		// Heartbeat
 		p.getServer().getScheduler().runTaskTimer(p, new BreweryRunnable(), 650, 1200);

src/com/dre/brewery/filedata/BConfig.java

@@ -56,6 +56,7 @@ public class BConfig {
 	public static Boolean hasSlimefun = null; // Slimefun ; Null if not checked
 	public static Boolean hasMMOItems = null; // MMOItems ; Null if not checked
 	public static boolean hasChestShop;
+	public static boolean hasShopKeepers;
 
 	// Barrel
 	public static boolean openEverywhere;
@@ -228,6 +229,7 @@ public class BConfig {
 		hasVault = plMan.isPluginEnabled("Vault")
 			&& Integer.parseInt(plMan.getPlugin("Vault").getDescription().getVersion().split("\\.")[1]) <= 6;
 		hasChestShop = plMan.isPluginEnabled("ChestShop");
+		hasShopKeepers = plMan.isPluginEnabled("Shopkeepers");
 
 		// various Settings
 		DataSave.autosave = config.getInt("autosave", 3);

src/com/dre/brewery/integration/ShopKeepersListener.java

@@ -0,0 +1,67 @@
+package com.dre.brewery.integration;
+
+import com.dre.brewery.Brew;
+import com.dre.brewery.P;
+import com.dre.brewery.filedata.BConfig;
+import com.nisovin.shopkeepers.api.events.PlayerOpenUIEvent;
+import com.nisovin.shopkeepers.api.ui.DefaultUITypes;
+import org.bukkit.Material;
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.Listener;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.inventory.InventoryCloseEvent;
+import org.bukkit.inventory.ItemStack;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class ShopKeepersListener implements Listener {
+	Set<HumanEntity> openedEditors = new HashSet<>();
+
+	@EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
+	public void onShopCreated(PlayerOpenUIEvent event) {
+		try {
+			if (event.getUIType() == DefaultUITypes.EDITOR() || event.getUIType() == DefaultUITypes.TRADING()) {
+				openedEditors.add(event.getPlayer());
+			}
+		} catch (Throwable e) {
+			failed(e);
+		}
+	}
+
+	@EventHandler(ignoreCancelled = true)
+	public void onInventoryClickShopKeeper(InventoryClickEvent event) {
+		if (openedEditors.isEmpty() || !openedEditors.contains(event.getWhoClicked())) {
+			return;
+		}
+		if (!(event.getWhoClicked() instanceof Player)) {
+			return;
+		}
+		ItemStack item = event.getCursor();
+		if (item != null && item.getType() == Material.POTION && event.getClickedInventory() == event.getView().getTopInventory()) {
+			Brew brew = Brew.get(item);
+			if (brew != null && !brew.isSealed()) {
+				P.p.msg(event.getWhoClicked(), P.p.languageReader.get("Player_ShopSealBrew"));
+			}
+		}
+	}
+
+
+	@EventHandler
+	public void onCloseInventoryShopKeeper(InventoryCloseEvent event) {
+		openedEditors.remove(event.getPlayer());
+	}
+
+	private void failed(Throwable e) {
+		HandlerList.unregisterAll(this);
+		BConfig.hasShopKeepers = false;
+		e.printStackTrace();
+		P.p.errorLog("Failed to notify Player using 'ShopKeepers'. Disabling 'ShopKeepers' support");
+		openedEditors.clear();
+	}
+
+}