feat: add sorting order

packages/analytics/src/constants.js

@@ -0,0 +1,23 @@
+/* eslint-disable class-methods-use-this */
+// eslint-disable-next-line max-classes-per-file
+class Order {}
+
+export class Asc extends Order {
+  matchStage(nextKey) {
+    return { $gt: nextKey }
+  }
+
+  order() {
+    return 1
+  }
+}
+
+export class Desc extends Order {
+  matchStage(nextKey) {
+    return { $lt: nextKey }
+  }
+
+  order() {
+    return -1
+  }
+}