Add option for admins to remove courses

components/RemoveCourse.vue

@@ -0,0 +1,64 @@
+<template>
+  <v-dialog v-model="show" max-width="500" persistent>
+    <template #activator="{ on, attrs }">
+      <v-card v-bind="attrs" v-on="on">
+        <v-card-text class="text-h6 error--text">
+          <v-icon left color="error">mdi-delete</v-icon>
+          Kurs löschen
+        </v-card-text>
+      </v-card>
+    </template>
+    <v-card>
+      <v-card-title>Kurs löschen</v-card-title>
+      <v-card-text class="text-subtitle-1">
+        Möchtest du den Kurs <strong>{{ courseId.toUpperCase() }}</strong> dauerhaft und unwiderruflich löschen?
+      </v-card-text>
+      <v-card-actions>
+        <v-spacer></v-spacer>
+        <v-btn text color="primary" @click="show = false">Abbrechen</v-btn>
+        <v-btn depressed color="primary" :loading="loading" @click="deleteCourse">Löschen</v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+</template>
+
+<script>
+import { doc, deleteDoc } from 'firebase/firestore'
+
+export default {
+  name: 'RemoveCourseDialog',
+  props: {
+    courseId: {
+      type: String,
+      required: true
+    }
+  },
+  data () {
+    return {
+      show: false,
+      loading: false
+    }
+  },
+  methods: {
+    deleteCourse () {
+      this.loading = true
+
+      // Delete document
+      deleteDoc(doc(this.$db, `kurse/${this.courseId}`))
+      .then((docRef) => {
+        // Successfully deleted the course from the database.
+        this.$store.commit('setCourse', { courseId: this.courseId, courseData: null })
+        this.$toast({content: `Der Kurs "${this.courseId.toUpperCase()}" wurde gelöscht.`, color: 'success'})
+        this.show = false
+
+        this.$router.push({ name: 'dashboard' })
+      })
+      .catch((error) => {
+        // Failed to add a new course to the database; display error message
+        this.$toast({content: error, color: 'error'})
+      })
+      .then(() => { this.loading = false })
+    }
+  }
+}
+</script>