Add rating system for community questions

plugins/open-ended-question.js

@@ -1,12 +1,37 @@
 export class OpenEndedQuestion {
-  constructor (id, question, solution, creator, created, ratings, difficulty) {
+  constructor (id, question, solution, creator, created, helpful, difficulty) {
     this.id = id
     this.question = question
     this.solution = solution
     this.creator = creator
     this.created = created
-    this.ratings = ratings
-    this.difficulty = difficulty
+    this.helpful = helpful || []
+    this.difficulty = {
+      easy: difficulty.leicht || [],
+      medium: difficulty.mittel || [],
+      hard: difficulty.schwer || []
+    }
+    this.updateDifficultyLevel()
+  }
+
+  updateDifficultyLevel () {
+    const easyCount = this.difficulty.easy.length
+    const mediumCount = this.difficulty.medium.length
+    const hardCount = this.difficulty.hard.length
+
+    if (hardCount > 0 && hardCount >= mediumCount && hardCount >= easyCount) this.difficultyLevel = 3
+    else if (mediumCount > 0 && mediumCount >= hardCount && mediumCount >= easyCount) this.difficultyLevel = 2
+    else if (easyCount > 0 && easyCount >= hardCount && easyCount >= mediumCount) this.difficultyLevel = 1
+    else this.difficultyLevel = null
+  }
+
+  getDifficultyString () {
+    switch (this.difficultyLevel) {
+      case 1: return 'Leicht'
+      case 2: return 'Mittel'
+      case 3: return 'Schwer'
+      default: return 'Unbewertet'
+    }
   }
 }
 
@@ -18,12 +43,16 @@ export const OpenEndedQuestionConverter = {
       musterloesung: openEndedQuestion.solution,
       ersteller: openEndedQuestion.creator,
       erstellt: openEndedQuestion.created,
-      bewertungen: openEndedQuestion.ratings,
-      schwierigkeit: openEndedQuestion.difficulty
+      hilfreich: openEndedQuestion.helpful,
+      schwierigkeit: {
+        leicht: openEndedQuestion.difficulty.easy,
+        mittel: openEndedQuestion.difficulty.medium,
+        schwer: openEndedQuestion.difficulty.hard
+      }
     }
   },
   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)
+    return new OpenEndedQuestion(snapshot.id, data.frage, data.musterloesung, data.ersteller, data.erstellt, data.hilfreich, data.schwierigkeit)
   }
 }