Add plugin

plugins/open-ended-question.js

@@ -0,0 +1,29 @@
+export class OpenEndedQuestion {
+  constructor (id, question, solution, creator, created, ratings, difficulty) {
+    this.id = id
+    this.question = question
+    this.solution = solution
+    this.creator = creator
+    this.created = created
+    this.ratings = ratings
+    this.difficulty = difficulty
+  }
+}
+
+// Firestore data converter
+export const OpenEndedQuestionConverter = {
+  toFirestore: (openEndedQuestion) => {
+    return {
+      frage: openEndedQuestion.question,
+      musterloesung: openEndedQuestion.solution,
+      ersteller: openEndedQuestion.creator,
+      erstellt: openEndedQuestion.created,
+      bewertungen: openEndedQuestion.ratings,
+      schwierigkeit: openEndedQuestion.difficulty
+    }
+  },
+  fromFirestore: (snapshot, options) => {
+    const data = snapshot.data(options)
+    return new OpenEndedQuestion(snapshot.id, data.frage, data.musterloesung, data.ersteller, data.erstellt, data.bewertungen, data.schwierigkeit)
+  }
+}