Implement Multimeter Functionality on Generators

src/main/java/io/github/thebusybiscuit/slimefun4/core/attributes/EnergyNetProvider.java

@@ -18,6 +18,7 @@
  * It must be implemented on any Generator or {@link Reactor}.
  * 
  * @author TheBusyBiscuit
+ * @author md5sha256
  * 
  * @see EnergyNet
  * @see EnergyNetComponent
@@ -48,6 +49,19 @@ default EnergyNetComponentType getEnergyComponentType() {
      */
     int getGeneratedOutput(@Nonnull Location l, @Nonnull Config data);
 
+    /**
+     * The method return how much this {@link EnergyNetProvider} is expected to provide to the {@link EnergyNet}
+     * and is not to be confused with {@link #getGeneratedOutput(Location, Config)}. This method will not
+     * consume any fuel or modify the provider in any way.
+     * @param l
+     *            The {@link Location} of this {@link EnergyNetProvider}
+     * @param data
+     *            The stored block data
+     *
+     * @return The expected generated output energy of this {@link EnergyNetProvider}.
+     */
+    int peekGeneratedOutput(@Nonnull Location l, @Nonnull Config data);
+
     /**
      * This method returns whether the given {@link Location} is going to explode on the
      * next tick.

src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/electric/gadgets/Multimeter.java

@@ -1,9 +1,13 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.electric.gadgets;
 
 import java.util.Optional;
+import java.util.function.Function;
 
 import javax.annotation.ParametersAreNonnullByDefault;
 
+import io.github.thebusybiscuit.slimefun4.core.attributes.EnergyNetProvider;
+import me.mrCookieSlime.CSCoreLibPlugin.Configuration.Config;
+import me.mrCookieSlime.Slimefun.api.BlockStorage;
 import org.bukkit.Location;
 import org.bukkit.entity.Player;
 import org.bukkit.inventory.ItemStack;
@@ -23,6 +27,7 @@
  * The {@link Multimeter} is used to measure charge and capacity of any {@link EnergyNetComponent}.
  * 
  * @author TheBusyBiscuit
+ * @author md5sha256
  * 
  * @see EnergyNet
  * @see EnergyNetComponent
@@ -55,7 +60,15 @@ public ItemUseHandler getItemHandler() {
 
                         Player p = e.getPlayer();
                         p.sendMessage("");
-                        Slimefun.getLocalization().sendMessage(p, "messages.multimeter", false, str -> str.replace("%stored%", stored).replace("%capacity%", capacity));
+
+                        if (component instanceof EnergyNetProvider) {
+                            EnergyNetProvider provider = (EnergyNetProvider) component;
+                            Config data = BlockStorage.getLocationInfo(l);
+                            String generating = NumberUtils.getCompactDouble(provider.peekGeneratedOutput(l, data)) + " J/t";
+                            Slimefun.getLocalization().sendMessages(p, "messages.multimeter-generating", false, str -> str.replace("%stored%", stored).replace("%capacity%", capacity).replace("%generating%", generating));
+                        } else {
+                            Slimefun.getLocalization().sendMessage(p, "messages.multimeter", false, str -> str.replace("%stored%", stored).replace("%capacity%", capacity));
+                        }
                         p.sendMessage("");
                     }
                 }

src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/electric/generators/SolarGenerator.java

@@ -1,5 +1,6 @@
 package io.github.thebusybiscuit.slimefun4.implementation.items.electric.generators;
 
+import javax.annotation.Nonnull;
 import javax.annotation.ParametersAreNonnullByDefault;
 
 import org.bukkit.Location;
@@ -26,6 +27,7 @@
  * {@link #getNightEnergy()}.
  * 
  * @author TheBusyBiscuit
+ * @author md5sha256
  * 
  * @see EnergyNet
  * @see EnergyNetProvider
@@ -96,6 +98,12 @@ public int getGeneratedOutput(Location l, Config data) {
         }
     }
 
+    @Override
+    public int peekGeneratedOutput(@Nonnull Location l, @Nonnull Config data) {
+        // Solar panels will not change when generating energy
+        return getGeneratedOutput(l, data);
+    }
+
     /**
      * This method returns whether a given {@link World} has daytime.
      * It will also return false if a thunderstorm is active in this world.

src/main/java/io/github/thebusybiscuit/slimefun4/implementation/items/electric/reactors/Reactor.java

@@ -54,6 +54,7 @@
  * @author John000708
  * @author AlexLander123
  * @author TheBusyBiscuit
+ * @author md5sha256
  * 
  * @see AGenerator
  * @see NuclearReactor
@@ -299,6 +300,43 @@ public int getGeneratedOutput(Location l, Config data) {
         }
     }
 
+    @Override
+    public int peekGeneratedOutput(@Nonnull Location l, @Nonnull Config data) {
+        BlockMenu inv = BlockStorage.getInventory(l);
+        BlockMenu accessPort = getAccessPort(l);
+        FuelOperation operation = processor.getOperation(l);
+
+        if (operation != null) {
+            return peekGenerateEnergy(l, data, inv, accessPort, operation);
+        } else {
+            return 0;
+        }
+    }
+
+    private int peekGenerateEnergy(@Nonnull Location l, @Nonnull Config data, @Nonnull BlockMenu inv, @Nullable BlockMenu accessPort, FuelOperation operation) {
+        int produced = getEnergyProduction();
+        String energyData = data.getString("energy-charge");
+        int charge = 0;
+
+        if (energyData != null) {
+            charge = Integer.parseInt(energyData);
+        }
+
+        int space = getCapacity() - charge;
+
+        if (space >= produced || getReactorMode(l) != ReactorMode.GENERATOR) {
+            if (needsCooling() && !hasEnoughCoolant(l, inv, accessPort, operation)) {
+                return 0;
+            }
+        }
+
+        if (space >= produced) {
+            return getEnergyProduction();
+        } else {
+            return 0;
+        }
+    }
+
     private int generateEnergy(@Nonnull Location l, @Nonnull Config data, @Nonnull BlockMenu inv, @Nullable BlockMenu accessPort, @Nonnull FuelOperation operation) {
         int produced = getEnergyProduction();
         String energyData = data.getString("energy-charge");

src/main/java/me/mrCookieSlime/Slimefun/Objects/SlimefunItem/abstractItems/AGenerator.java

@@ -199,6 +199,28 @@ public int getGeneratedOutput(Location l, Config data) {
         }
     }
 
+    @Override
+    public int peekGeneratedOutput(@Nonnull Location l, @Nonnull Config data) {
+        FuelOperation operation = processor.getOperation(l);
+        if (operation != null) {
+            if (!operation.isFinished()) {
+                if (isChargeable()) {
+                    int charge = getCharge(l, data);
+                    if (getCapacity() - charge >= getEnergyProduction()) {
+                        return getEnergyProduction();
+                    }
+                    return 0;
+                } else {
+                    return getEnergyProduction();
+                }
+            } else {
+                return 0;
+            }
+        } else {
+            return 0;
+        }
+    }
+
     private boolean isBucket(@Nullable ItemStack item) {
         if (item == null) {
             return false;

src/main/resources/languages/en/messages.yml

@@ -158,6 +158,9 @@ messages:
   disabled-item: '&4&lThis Item has been disabled! How did you even get that?'
   no-tome-yourself: '&cYou cannot use the &4Tome of Knowledge &con yourself...'
   multimeter: '&bStored Energy: &3%stored% &b/ &3%capacity%'
+  multimeter-generating:
+  - '&bStored Energy: &3%stored% &b/ &3%capacity%'
+  - '&bGenerating: &3%generating%'
   piglin-barter: '&4You cannot barter with piglins using Slimefun items'
   bee-suit-slow-fall: '&eYour Bee Wings will help you to get back to the ground safe and slow'