Take into account Context initial state #13

Author: codingedgar

package.json

@@ -1,6 +1,6 @@
 {
   "name": "macos-multi-select",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Given a list of ids, and an action, return a list of selected items with the same behaviour of macOS finder list view selection.",
   "main": "dist/index.js",
   "repository": "[email protected]:codingedgar/macos-multi-select.git",

src/index.ts

@@ -4,7 +4,7 @@ import { findAdjacentToPivotInSortedArray, findNextPivot } from "./arrayUtils";
 export type Context = {
   list: string[],
   selected: string[],
-  adjacentPivot: string,
+  adjacentPivot: string | undefined,
 }
 
 type Command =
@@ -84,7 +84,8 @@ export function multiselect(context: Context, command: Command): Context {
     }
   } else if (
     command.type === "SELECT ADJACENT" &&
-    listIncludesAndIsNotEmpty(context.list, command.id)
+    listIncludesAndIsNotEmpty(context.list, command.id)  &&
+    context.adjacentPivot !== undefined
   ) {
 
     const pivotIndex = context.list.indexOf(context.adjacentPivot);