FlashCardResults shows colorized statistics

Toki Trainer/Constants.swift

@@ -31,4 +31,12 @@ struct K {
         
         return request
     }
+    
+    static var getFlashCardAnswersWithPredicateFetchRequest: NSFetchRequest<FlashCardAnswer> {
+        let request: NSFetchRequest<FlashCardAnswer> = FlashCardAnswer.fetchRequest()
+        request.sortDescriptors = []
+        request.predicate = NSPredicate(format: "word == %@", "a")
+        
+        return request
+    }
 }

Toki Trainer/Views/FlashCardResultsView.swift

@@ -12,25 +12,51 @@ struct FlashCardResultsView: View {
 
     @FetchRequest(fetchRequest: K.getFlashCardAnswersFetchRequest) var answers: FetchedResults<FlashCardAnswer>
     
+    @ObservedObject var tokiDictionaryViewModel = TokiDictionaryViewModel()
+
+    @State private var wordStatistics: [String: Double] = [:]
     @State private var statistics = 0.0
     
     func calculateStatistics() {
         for answer in answers {
-            if answer.triesCount != 0 {
-                print("word: \(answer.word)")
-                print("tries: \(answer.triesCount)")
-                print("correct: \(answer.correctCount)")
-                self.statistics = Double(answer.correctCount) / Double(answer.triesCount)
+            if answer.triesCount > 0 {
+                self.wordStatistics[answer.word!] = (Double(answer.correctCount) / Double(answer.triesCount)) * 100
             }
         }
+        print(wordStatistics)
+    }
+    
+    func calculateBackgroundColor(_ percent: Double) -> Color {
+        if percent >= 80 {
+            return Color.green
+        } else if percent >= 40 {
+            return Color.yellow
+        } else {
+            return Color.red
+        }
+        
     }
 
     
     var body: some View {
-        Text("Percentage: \(statistics)")
-            .onAppear {
-                calculateStatistics()
+        List(wordStatistics.sorted(by: <), id: \.key) { entry in
+            HStack {
+                Text(entry.key)
+                Spacer()
+                Text("\(String(format: "%.2f", entry.value)) %")
             }
+            .listRowBackground(calculateBackgroundColor(entry.value))
+        }
+        .onAppear {
+            calculateStatistics()
+        }
+    }
+}
+
+extension Double {
+    func formatAsPercent(places: Int) -> String {
+        let formattedValue = String(format: "%.2f", self)
+        return formattedValue
     }
 }
 

Toki Trainer/Views/FlashCardView.swift

@@ -103,8 +103,10 @@ struct FlashCardStack: View {
     func setFlashCardAnswersCoreData(_ correct: Bool) {
         var cardInDatabase = false
         for answer in flashCardAnswers {
-            print(answer.word)
             if answer.word == dictionary[currentFlashCard].word {
+                print("word in database: \(answer.word)")
+                print("tries: \(answer.triesCount)")
+                print("correct`: \(answer.correctCount)")
                 cardInDatabase = true
                 answer.setValue((answer.triesCount + 1), forKey: "triesCount")
                 if correct {