AssessmentContentMutatedEvent change format

Instead of passing list of strings for textual representation, pass list of taskinformation with textual information & task ID

src/main/java/de/unistuttgart/iste/meitrex/common/event/AssessmentContentMutatedEvent.java

@@ -14,8 +14,65 @@
 @NoArgsConstructor
 @AllArgsConstructor
 public class AssessmentContentMutatedEvent {
+    /**
+     * ID of the course the assessment belongs to.
+     */
     private UUID courseId;
+    /**
+     * ID of the assessment this event is about.
+     */
     private UUID assessmentId;
+    /**
+     * Type of the assessment.
+     */
     private AssessmentType assessmentType;
-    private List<String> textualRepresentation;
+    /**
+     * List containing information about the tasks this assessment consists of.
+     *
+     * What exactly constitutes a "task" is implementation-specific for the different types of assessments. It should
+     * just be consistent within one assessment type. E.g. for quizzes each question can be a task, and for flashcards
+     * each flashcard can be a task.
+     */
+    private List<TaskInformation> taskInformationList;
+
+    @Data
+    @AllArgsConstructor
+    public static class TaskInformation {
+        /**
+         * ID of this task of the assessment. Exactly what entity this ID references can be freely chosen and is
+         * implementation-specific for the different types of assessments, but it should be the ID of the entity this
+         * task represents, e.g. if we have a quiz and decided that each question is a separate task, then the ID of the
+         * task should be the ID of the question entity in our quiz service.
+         */
+        private UUID taskId;
+        /**
+         * <p>
+         * The purpose of this field is to provide the contents of this task in a simple textual format for other
+         * services to use without having to have any assessment-specific code.
+         * </p><p>
+         * There is no exact formatting guideline for the textual representation. Its purpose is to just provide a very
+         * basic means to fetch assessments’ contents in textual form, e.g. for performing a search or similar purposes.
+         * </p><p>
+         * The textual representation can contain spoilers, so it should never be shown to students.
+         * </p><p>
+         * A good textual representation may look like the following for example, for a quiz:
+         * </p><p>
+         * String 1:
+         * <pre>
+         * Question: How tall is the Eiffel Tower?
+         * Correct Answer: 330m
+         * </pre>
+         * String 2:
+         * <pre>
+         * Question: What colors make up the French flag?
+         * Correct Answer: blue, white, and red
+         * </pre>
+         * String 3:
+         * <pre>
+         * Task: Fill in the gaps in the text:
+         * King Luis XIV famously said: "L'[etat], c'est [moi]!"
+         * </pre>
+         */
+        private String textualRepresentation;
+    }
 }