Add PaginatedList helper

helpers/api/pagination.js

@@ -0,0 +1,44 @@
+export class PaginatedList {
+    constructor({ list, perPage }) {
+        this.list = list
+        this.perPage = perPage
+    }
+
+    get total () {
+        return this.list.length
+    }
+
+    get pageCount () {
+        return Math.ceil( this.total / this.perPage )
+    }
+
+    makePageItems ( pageNumber ) {
+        const start = (pageNumber - 1) * this.perPage
+        const end = start + this.perPage
+
+        return this.list.slice(start, end)
+    }
+
+    makePage ( pageNumber ) {
+        const items = this.makePageItems( pageNumber )
+
+        return {
+            number: pageNumber,
+            items,
+            json: JSON.stringify( items )
+        }
+    }
+
+    get pages () {
+        // Create an empty array of pages
+        const pages = Array( this.pageCount ).fill({})
+
+        return pages.map( ( _, index ) => {
+            const pageNumber = index + 1
+
+            return this.makePage( pageNumber )
+        })
+    }
+}
+
+