Implement wire networks, add levers

src/js/game/items/boolean_item.js

@@ -32,6 +32,13 @@ export class BooleanItem extends BaseItem {
         this.value = value ? 1 : 0;
     }
 
+    /**
+     * @param {BaseItem} other
+     */
+    equalsImpl(other) {
+        return this.value === /** @type {BooleanItem} */ (other).value;
+    }
+
     /**
      * @param {number} x
      * @param {number} y

src/js/game/items/color_item.js

@@ -27,6 +27,13 @@ export class ColorItem extends BaseItem {
         return enumItemType.color;
     }
 
+    /**
+     * @param {BaseItem} other
+     */
+    equalsImpl(other) {
+        return this.color === /** @type {ColorItem} */ (other).color;
+    }
+
     /**
      * @param {enumColors} color
      */

src/js/game/items/shape_item.js

@@ -25,6 +25,13 @@ export class ShapeItem extends BaseItem {
         return enumItemType.shape;
     }
 
+    /**
+     * @param {BaseItem} other
+     */
+    equalsImpl(other) {
+        return this.definition.getHash() === /** @type {ShapeItem} */ (other).definition.getHash();
+    }
+
     /**
      * @param {ShapeDefinition} definition
      */