add inventory find functions

src/main/java/tech/iBeans/POSware/Lite/inventory.java

@@ -14,6 +14,7 @@ import java.util.*;
 public class inventory {
     
     public static Dictionary<String, Dictionary> items = new Hashtable<>();
+    public static ArrayList<String> item_names = collate();
     
     public static boolean refresh() {
         /* Refresh the inventory. 
@@ -22,6 +23,7 @@ public class inventory {
         */
         // Pull the sample items. 
         items = data_test.fake_items;
+        item_names = collate();
         return (true);
     };
     
@@ -75,10 +77,10 @@ public class inventory {
         
         ArrayList<String> items_SKU = new ArrayList<>();
         Enumeration<String> items_SKU_raw = items.keys();
-        do {
+        while (items_SKU_raw.hasMoreElements()) {
             String item_SKU = items_SKU_raw.nextElement();
             items_SKU.add(item_SKU);
-        } while (items_SKU_raw.hasMoreElements());
+        };
         
         return(items_SKU);
     };
@@ -115,10 +117,58 @@ public class inventory {
         };
         
         return(items_names_display);
+    };
     
-    }
+    public static Dictionary find(String NAME) {
+        /* Find an item by its name, and get its information. 
+        
+        Parameters: 
+            (String) NAME: the name or SKU of an item
+        Returns: (Dictionary) its information
+        */
+        
+        Dictionary SKU_DETAILS = null;
+        
+        refresh();
+        Boolean isNAME = item_names.contains(NAME);
+        Boolean isSKU = list().contains(NAME);
+        
+        if (isNAME) {
+            int item_index = item_names.indexOf(NAME);
+            SKU_DETAILS = items.get(list().get(item_index));
+        } else if (isSKU) {
+            SKU_DETAILS = items.get(NAME);
+        };
+        return (SKU_DETAILS);
+    };
+    
+    public static Dictionary find(int INDEX) {
+        /* Find an item by its index in the collated data, and get its information. 
+        
+        Parameters: 
+            (String) NAME: the name or SKU of an item
+        Returns: (Dictionary) its information
+        */
+        
+        Dictionary SKU_DETAILS = null;
+        
+        refresh();
+        int NAME_LENGTH = item_names.size();
+        
+        if (INDEX > NAME_LENGTH) {
+            // Stop being out of bounds. 
+            return (null); 
+        };
+        
+        // Get the details of the data. 
+        SKU_DETAILS = items.get(list().get(INDEX));
+        
+        // It's time to return the data. 
+        return (SKU_DETAILS);
+    };
     
     static {
         refresh();
+        collate();
     }
 };