Initial commit

src/main/java/electroblob/wizardry/item/IConjuredItem.java

@@ -0,0 +1,32 @@
+package electroblob.wizardry.item;
+
+import net.minecraft.item.Item;
+import net.minecraft.item.ItemStack;
+import net.minecraft.nbt.NBTTagCompound;
+
+/** Allows wizardry to identify items that are conjured (and therefore need destroying if they leave the inventory)
+ * without explicitly referencing each, thereby allowing for better expandibility. */
+public interface IConjuredItem {
+	
+	/** The NBT tag key used to store the duration multiplier for conjured items. */
+	public static final String DURATION_MULTIPLIER_KEY = "durationMultiplier";
+
+	/** Helper method for setting the duration multiplier (via NBT) for conjured items. */
+	public static void setDurationMultiplier(ItemStack stack, float multiplier){
+		if(!stack.hasTagCompound()) stack.setTagCompound(new NBTTagCompound());
+		stack.getTagCompound().setFloat(DURATION_MULTIPLIER_KEY, multiplier);
+	}
+	
+	/** Helper method for returning the max damage of a conjured item based on its NBT data. Centralises the code.
+	 * Implementors will almost certainly want to call this from {@link Item#getMaxDamage(ItemStack stack)}. */
+	public default int getMaxDamageFromNBT(ItemStack stack){
+		if(stack.hasTagCompound() && stack.getTagCompound().hasKey(DURATION_MULTIPLIER_KEY)){
+			return (int)(this.getBaseDuration() * stack.getTagCompound().getFloat(DURATION_MULTIPLIER_KEY));
+		}
+		return this.getBaseDuration();
+	}
+	
+	/** Returns the base duration in ticks for this conjured item. Should be a constant (commonly 600).
+	 * Implementors may want to call this when setting an item's max damage in its constructor. */
+	public int getBaseDuration();
+}