yourpart3/frontend/src/views/social/VocabLessonView.vue

<template>
  <div class="vocab-lesson-view">
    <div v-if="loading">{{ $t('general.loading') }}</div>
    <div v-else-if="lesson">
      <div class="lesson-header">
        <button @click="back" class="btn-back">{{ $t('general.back') }}</button>
        <h2>{{ lesson.title }}</h2>
      </div>
      
      <p v-if="lesson.description" class="lesson-description">{{ lesson.description }}</p>
      
      <div v-if="lesson.grammarExercises && lesson.grammarExercises.length > 0" class="grammar-exercises">
        <h3>{{ $t('socialnetwork.vocab.courses.grammarExercises') }}</h3>
        <div v-for="exercise in lesson.grammarExercises" :key="exercise.id" class="exercise-item">
          <h4>{{ exercise.title }}</h4>
          <p v-if="exercise.description">{{ exercise.description }}</p>
          <div v-if="exercise.type === 'gap_fill'" class="gap-fill-exercise">
            <p v-html="formatGapFill(exercise.content)"></p>
            <input v-model="exerciseAnswers[exercise.id]" :placeholder="$t('socialnetwork.vocab.courses.enterAnswer')" />
            <button @click="checkAnswer(exercise.id)">{{ $t('socialnetwork.vocab.courses.checkAnswer') }}</button>
            <div v-if="exerciseResults[exercise.id]" class="exercise-result" :class="exerciseResults[exercise.id].correct ? 'correct' : 'wrong'">
              {{ exerciseResults[exercise.id].correct ? $t('socialnetwork.vocab.courses.correct') : $t('socialnetwork.vocab.courses.wrong') }}
              <p v-if="exercise.explanation">{{ exercise.explanation }}</p>
            </div>
          </div>
        </div>
      </div>
      
      <div v-else>
        <p>{{ $t('socialnetwork.vocab.courses.noExercises') }}</p>
      </div>
    </div>
  </div>
</template>

<script>
import { mapGetters } from 'vuex';
import apiClient from '@/utils/axios.js';

export default {
  name: 'VocabLessonView',
  props: {
    courseId: {
      type: String,
      required: true
    },
    lessonId: {
      type: String,
      required: true
    }
  },
  data() {
    return {
      loading: false,
      lesson: null,
      exerciseAnswers: {},
      exerciseResults: {}
    };
  },
  computed: {
    ...mapGetters(['user'])
  },
  watch: {
    courseId() {
      this.loadLesson();
    },
    lessonId() {
      this.loadLesson();
    }
  },
  methods: {
    async loadLesson() {
      this.loading = true;
      try {
        const res = await apiClient.get(`/api/vocab/lessons/${this.lessonId}`);
        this.lesson = res.data;
        // Lade Grammatik-Übungen
        if (this.lesson && this.lesson.id) {
          await this.loadGrammarExercises();
        }
      } catch (e) {
        console.error('Konnte Lektion nicht laden:', e);
      } finally {
        this.loading = false;
      }
    },
    async loadGrammarExercises() {
      try {
        const res = await apiClient.get(`/api/vocab/lessons/${this.lessonId}/grammar-exercises`);
        this.lesson.grammarExercises = res.data || [];
      } catch (e) {
        console.error('Konnte Grammatik-Übungen nicht laden:', e);
        this.lesson.grammarExercises = [];
      }
    },
    formatGapFill(content) {
      // Ersetze Platzhalter mit Input-Feldern
      return content.replace(/\{gap\}/g, '<span class="gap">_____</span>');
    },
    async checkAnswer(exerciseId) {
      try {
        const answer = this.exerciseAnswers[exerciseId];
        const res = await apiClient.post(`/api/vocab/exercises/${exerciseId}/check`, { answer });
        this.exerciseResults[exerciseId] = res.data;
      } catch (e) {
        console.error('Fehler beim Prüfen der Antwort:', e);
      }
    },
    back() {
      this.$router.push(`/socialnetwork/vocab/courses/${this.courseId}`);
    }
  },
  async mounted() {
    await this.loadLesson();
  }
};
</script>

<style scoped>
.vocab-lesson-view {
  padding: 20px;
}

.lesson-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
}

.btn-back {
  padding: 8px 16px;
  border: 1px solid #ddd;
  border-radius: 4px;
  background: white;
  cursor: pointer;
}

.lesson-description {
  color: #666;
  margin-bottom: 20px;
}

.grammar-exercises {
  margin-top: 30px;
}

.exercise-item {
  background: white;
  padding: 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin-bottom: 15px;
}

.gap-fill-exercise input {
  width: 100%;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 4px;
  margin: 10px 0;
}

.exercise-result {
  margin-top: 10px;
  padding: 10px;
  border-radius: 4px;
}

.exercise-result.correct {
  background: #d4edda;
  color: #155724;
}

.exercise-result.wrong {
  background: #f8d7da;
  color: #721c24;
}
</style>