Storing data on terminate/finish and calling listeners for LMS sequencing

src/cmi/scorm12_cmi.js

@@ -1205,3 +1205,52 @@ export class CMIInteractionsCorrectResponsesObject extends BaseCMI {
     return result;
   }
 }
+
+/**
+ * Class for AICC Navigation object
+ */
+export class NAV extends BaseCMI {
+  /**
+   * Constructor for NAV object
+   */
+  constructor() {
+    super();
+  }
+
+  #event = '';
+
+  /**
+   * Getter for #event
+   * @return {string}
+   */
+  get event() {
+    return (!this.jsonString) ? throwWriteOnlyError() : this.#event;
+  }
+
+  /**
+   * Setter for #event
+   * @param {string} event
+   */
+  set event(event) {
+    if (check12ValidFormat(event, regex.NAVEvent)) {
+      this.#event = event;
+    }
+  }
+
+  /**
+   * toJSON for nav object
+   * @return {
+   *    {
+   *      event: string
+   *    }
+   *  }
+   */
+  toJSON() {
+    this.jsonString = true;
+    const result = {
+      'event': this.event,
+    };
+    delete this.jsonString;
+    return result;
+  }
+}