Updated the counter of exercises

src/utils/moduleUtils.ts

@@ -1,4 +1,5 @@
 import {Module} from "@/interfaces";
+import {Exercise} from "@/interfaces/exam";
 
 export const MODULE_ARRAY: Module[] = ["reading", "listening", "writing", "speaking"];
 
@@ -16,3 +17,14 @@ export const sortByModule = (a: {module: Module}, b: {module: Module}) => {
 export const sortByModuleName = (a: string, b: string) => {
 	return MODULE_ARRAY.findIndex((x) => a === x) - MODULE_ARRAY.findIndex((x) => b === x);
 };
+
+export const countExercises = (exercises: Exercise[]) => {
+	const lengthMap = exercises.map((e) => {
+		if (e.type === "multipleChoice") return e.questions.length;
+		if (e.type === "interactiveSpeaking") return e.prompts.length;
+
+		return 1;
+	});
+
+	return lengthMap.reduce((accumulator, current) => accumulator + current, 0);
+};