Fixes dupe glitch in #2358

- Checks the input before any processing happens
- Recipe preview now updates when recipe grid changes instead of when
it's done processing

src/main/java/com/lothrazar/cyclic/block/crafter/TileCrafter.java

@@ -143,11 +143,6 @@ public void serverTick() {
     if (timer < 0) {
       timer = 0;
     }
-    //timer phase
-    if (--timer > 0) {
-      return;
-    }
-    //timer is out, therefore processing 
     Recipe<CraftingContainer> lastValidRecipe = findMatchingRecipe(null);
     if (lastValidRecipe == null) {
       //reset 
@@ -160,6 +155,13 @@ public void serverTick() {
       setPreviewSlot(recipeOutput);
       //if we have space for the output, then go ahead
       if (hasFreeSpace(outHandler, recipeOutput)) {
+    	  if(!checkInput(inputHandler)) { //Checks input before processing
+    	    	this.timer = TIMER_FULL;
+    	    	return;
+    	    }
+    	  if (--timer > 0) { //Get recipe before processing
+    	      return;
+    	    }
         if (doCraft(lastValidRecipe)) {
           //reset the timer
           this.timer = TIMER_FULL;
@@ -211,6 +213,35 @@ private boolean hasFreeSpace(IItemHandler inv, ItemStack output) {
     return test.isEmpty(); //empty means all of it was allowed to go in
   }
 
+  // This could be done better, but it works so ¯\_(ツ)_/¯
+  private boolean checkInput(IItemHandler inv) {
+	  IItemHandler gridHandler = this.gridCap.orElse(null);
+	  List<ItemStack> inputStacks = new ArrayList<ItemStack>();
+	  List<ItemStack> gridStacks = new ArrayList<ItemStack>();
+	  for(int i = 0; i < inv.getSlots(); i++) {
+		  inputStacks.add(inv.getStackInSlot(i).copy());
+	  }
+	  for(int i = 0; i < gridHandler.getSlots(); i++) {
+		  gridStacks.add(gridHandler.getStackInSlot(i).copy());
+	  }
+	  for(ItemStack stack : inputStacks) {
+		  List<ItemStack> lolbit = new ArrayList<ItemStack>();
+		  boolean match = false;
+		  for(ItemStack grid : gridStacks) {
+			  if(stack.getItem() == grid.getItem()) {
+				  match = true;
+				  lolbit.add(grid);
+				  stack.shrink(1);
+			  }
+		  }
+		  if(match) {
+			  gridStacks.removeAll(lolbit);
+		  }
+	  }
+	  if(gridStacks.isEmpty()) return true;
+	  return false;
+  }
+
   //TODO:? re-write this whole thing using ASSEMBLE?
   //big change
   //  for (int i = 0; i < 9; i++) {