Fix Vault No Economy Plugin Found Error (#613)

src/main/java/com/Acrobot/ChestShop/ChestShop.java

@@ -14,6 +14,7 @@ import com.Acrobot.ChestShop.Listeners.Block.BlockPlace;
 import com.Acrobot.ChestShop.Listeners.Block.Break.ChestBreak;
 import com.Acrobot.ChestShop.Listeners.Block.Break.SignBreak;
 import com.Acrobot.ChestShop.Listeners.Block.SignCreate;
+import com.Acrobot.ChestShop.Listeners.Economy.EconomyAdapter;
 import com.Acrobot.ChestShop.Listeners.Economy.ServerAccountCorrector;
 import com.Acrobot.ChestShop.Listeners.Economy.TaxModule;
 import com.Acrobot.ChestShop.Listeners.AuthMeChestShopListener;
@@ -92,6 +93,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.UUID;
+import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
@@ -335,7 +337,7 @@ public class ChestShop extends JavaPlugin {
         registerEvent(new com.Acrobot.ChestShop.Plugins.ChestShop()); //Chest protection
 
         registerEvent(new Dependencies());
-        
+
         registerEvent(new NameManager());
 
         registerPreShopCreationEvents();
@@ -536,6 +538,16 @@ public class ChestShop extends JavaPlugin {
         return new DrilldownPie(statId, () -> map);
     }
 
+    public static DrilldownPie createStaticDrilldownStat(String statId, Callable<EconomyAdapter.ProviderInfo> callableProviderInfo) {
+        return new DrilldownPie(statId, () -> {
+            EconomyAdapter.ProviderInfo providerInfo = callableProviderInfo.call();
+            if (providerInfo == null) {
+                return ImmutableMap.of();
+            }
+            return ImmutableMap.of(providerInfo.getName(), ImmutableMap.of(providerInfo.getVersion(), 1));
+        });
+    }
+
     private int[] getChartArray(boolean value) {
         return new int[]{!value ? 1 : 0, value ? 0 : 1};
     }

src/main/java/com/Acrobot/ChestShop/Dependencies.java

@@ -111,7 +111,7 @@ public class Dependencies implements Listener {
         }
 
         ChestShop.getMetrics().addCustomChart(ChestShop.createStaticDrilldownStat("economyAdapter", plugin, Bukkit.getPluginManager().getPlugin(plugin).getDescription().getVersion()));
-        ChestShop.getMetrics().addCustomChart(ChestShop.createStaticDrilldownStat("economyPlugin", economy.getProviderInfo().getName(), economy.getProviderInfo().getVersion()));
+        ChestShop.getMetrics().addCustomChart(ChestShop.createStaticDrilldownStat("economyPlugin", economy::getProviderInfo));
 
         ChestShop.registerListener(economy);
         ChestShop.getBukkitLogger().info(plugin + " loaded!");
@@ -256,7 +256,7 @@ public class Dependencies implements Listener {
             this.author = author;
         }
     }
-    
+
     @EventHandler(priority = EventPriority.MONITOR)
     public void onEnable(PluginEnableEvent event) {
         Plugin plugin = event.getPlugin();

src/main/java/com/Acrobot/ChestShop/Listeners/Economy/EconomyAdapter.java

@@ -11,11 +11,13 @@ import com.Acrobot.ChestShop.Events.Economy.CurrencySubtractEvent;
 import com.Acrobot.ChestShop.Events.Economy.CurrencyTransferEvent;
 import com.Acrobot.ChestShop.UUIDs.NameManager;
 import org.bukkit.event.Listener;
+import org.jetbrains.annotations.Nullable;
 
 import java.math.BigDecimal;
 
 public abstract class EconomyAdapter implements Listener {
 
+    @Nullable
     public abstract ProviderInfo getProviderInfo();
 
     public abstract void onAmountCheck(CurrencyAmountEvent event);

src/main/java/com/Acrobot/ChestShop/Listeners/Economy/Plugins/ReserveListener.java

@@ -33,7 +33,10 @@ public class ReserveListener extends EconomyAdapter {
     }
 
     @Override
-    public ProviderInfo getProviderInfo() {
+    public @Nullable ProviderInfo getProviderInfo() {
+        if (economyAPI == null) {
+            return null;
+        }
         return new ProviderInfo(economyAPI.name(), economyAPI.version());
     }
 

src/main/java/com/Acrobot/ChestShop/Listeners/Economy/Plugins/VaultListener.java

@@ -15,6 +15,7 @@ import org.bukkit.ChatColor;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.event.EventHandler;
+import org.bukkit.event.server.ServerLoadEvent;
 import org.bukkit.event.server.ServiceRegisterEvent;
 import org.bukkit.event.server.ServiceUnregisterEvent;
 import org.bukkit.plugin.Plugin;
@@ -64,7 +65,10 @@ public class VaultListener extends EconomyAdapter {
     }
 
     @Override
-    public ProviderInfo getProviderInfo() {
+    public @Nullable ProviderInfo getProviderInfo() {
+        if (provider == null) {
+            return null;
+        }
         return new ProviderInfo(provider.getName(), providingPlugin.getDescription().getVersion());
     }
 
@@ -107,6 +111,17 @@ public class VaultListener extends EconomyAdapter {
         }
     }
 
+    @EventHandler
+    public void onServerLoad(ServerLoadEvent event) {
+        if (event.getType() == ServerLoadEvent.LoadType.STARTUP) {
+            // Server and plugins are loaded, so we can check for the economy provider now
+            if (provider == null) {
+                ChestShop.getBukkitLogger().log(Level.SEVERE, "No Vault compatible Economy plugin found!");
+                ChestShop.getBukkitServer().getPluginManager().disablePlugin(ChestShop.getPlugin());
+            }
+        }
+    }
+
     @EventHandler
     public void onAmountCheck(CurrencyAmountEvent event) {
         if (!checkSetup() || event.wasHandled() || !event.getAmount().equals(BigDecimal.ZERO)) {