feat(frontend): Vue can now interact with the chosen answers for questions.

frontend/src/views/learning-paths/LearningObjectView.vue

@@ -3,6 +3,8 @@
     import type { UseQueryReturnType } from "@tanstack/vue-query";
     import { useLearningObjectHTMLQuery } from "@/queries/learning-objects.ts";
     import UsingQueryResult from "@/components/UsingQueryResult.vue";
+    import {nextTick, onMounted, reactive, watch} from "vue";
+    import {getGiftAdapterForType} from "@/views/learning-paths/gift-adapters/gift-adapters.ts";
 
     const props = defineProps<{ hruid: string; language: Language; version: number }>();
 
@@ -11,6 +13,49 @@
         () => props.language,
         () => props.version,
     );
+
+    const currentAnswer = reactive([]);
+
+    function forEachQuestion(
+        doAction: (questionIndex: number, questionName: string, questionType: string, questionElement: Element) => void
+    ) {
+        const questions = document.querySelectorAll(".gift-question");
+        questions.forEach(question => {
+            const name = question.id.match(/gift-q(\d+)/)?.[1]
+            const questionType = question.classList.values()
+                .find(it => it.startsWith("gift-question-type"))
+                .match(/gift-question-type-([^ ]*)/)?.[1];
+
+            if (!name || isNaN(parseInt(name)) || !questionType) return;
+
+            const index = parseInt(name) - 1;
+
+            doAction(index, name, questionType, question);
+        });
+    }
+
+    function attachQuestionListeners() {
+        forEachQuestion((index, name, type, element) => {
+            getGiftAdapterForType(type)?.installListener(
+                element, (newAnswer) => currentAnswer[index] = newAnswer
+            );
+        });
+    }
+
+    function setAnswers(answers: (object | string | number)[]) {
+        forEachQuestion((index, name, type, element) => {
+            getGiftAdapterForType(type)?.setAnswer(element, answers[index]);
+        });
+        currentAnswer.fill(answers);
+    }
+
+    onMounted(() => nextTick(() => attachQuestionListeners()));
+
+    watch(learningObjectHtmlQueryResult.data, async () => {
+        await nextTick();
+        attachQuestionListeners();
+        setAnswers([1]);
+    });
 </script>
 
 <template>
@@ -22,6 +67,7 @@
             class="learning-object-container"
             v-html="learningPathHtml.data.body.innerHTML"
         ></div>
+        {{ currentAnswer }}
     </using-query-result>
 </template>
 

frontend/src/views/learning-paths/gift-adapters/essay-question-adapter.ts

@@ -0,0 +1,13 @@
+export const essayQuestionAdapter: GiftAdapter = {
+    questionType: "Essay",
+
+    installListener(questionElement: Element, answerUpdateCallback: (newAnswer: string | number | object) => void): void {
+        const textArea = questionElement.querySelector('textarea')!;
+        textArea.addEventListener('input', () => answerUpdateCallback(textArea.value));
+    },
+
+    setAnswer(questionElement: Element, answer: string | number | object): void {
+        const textArea = questionElement.querySelector('textarea')!;
+        textArea.value = String(answer);
+    }
+}

frontend/src/views/learning-paths/gift-adapters/gift-adapter.d.ts

@@ -0,0 +1,5 @@
+interface GiftAdapter {
+    questionType: string;
+    installListener(questionElement: Element, answerUpdateCallback: (newAnswer: string | number | object) => void): void;
+    setAnswer(questionElement: Element, answer: string | number | object): void;
+}

frontend/src/views/learning-paths/gift-adapters/gift-adapters.ts

@@ -0,0 +1,8 @@
+import {multipleChoiceQuestionAdapter} from "@/views/learning-paths/gift-adapters/multiple-choice-question-adapter.ts";
+import {essayQuestionAdapter} from "@/views/learning-paths/gift-adapters/essay-question-adapter.ts";
+
+export const giftAdapters = [multipleChoiceQuestionAdapter, essayQuestionAdapter];
+
+export function getGiftAdapterForType(questionType: string): GiftAdapter | undefined {
+    return giftAdapters.find(it => it.questionType === questionType);
+}

frontend/src/views/learning-paths/gift-adapters/multiple-choice-question-adapter.ts

@@ -0,0 +1,26 @@
+export const multipleChoiceQuestionAdapter: GiftAdapter = {
+    questionType: "MC",
+
+    installListener(questionElement: Element, answerUpdateCallback: (newAnswer: string | number | object) => void): void {
+        questionElement.querySelectorAll('input[type=radio]').forEach(element => {
+            const input = element as HTMLInputElement;
+
+            input.addEventListener('change', () => {
+                answerUpdateCallback(parseInt(input.value));
+            });
+            // Optional: initialize value if already selected
+            if (input.checked) {
+                answerUpdateCallback(parseInt(input.value));
+            }
+        });
+    },
+
+    setAnswer(questionElement: Element, answer: string | number | object): void {
+        questionElement.querySelectorAll('input[type=radio]').forEach(element => {
+            const input = element as HTMLInputElement;
+            console.log(`input: ${input.value}, answer: ${answer}`);
+            input.checked = String(answer) === String(input.value);
+            console.log(input.checked);
+        });
+    }
+}