added necessary npm packages

node_modules/json-server/lib/server/utils.js

@@ -0,0 +1,32 @@
+"use strict";
+
+module.exports = {
+  getPage
+};
+
+function getPage(array, page, perPage) {
+  var obj = {};
+  var start = (page - 1) * perPage;
+  var end = page * perPage;
+
+  obj.items = array.slice(start, end);
+  if (obj.items.length === 0) {
+    return obj;
+  }
+
+  if (page > 1) {
+    obj.prev = page - 1;
+  }
+
+  if (end < array.length) {
+    obj.next = page + 1;
+  }
+
+  if (obj.items.length !== array.length) {
+    obj.current = page;
+    obj.first = 1;
+    obj.last = Math.ceil(array.length / perPage);
+  }
+
+  return obj;
+}