Statistic calculation for "a" word

Toki Trainer/Views/ContentView.swift

@@ -29,7 +29,7 @@ struct ContentView: View {
                     Image(systemName: "character.textbox")
                     Text("Flash Cards")
                 }
-            FlashCardResultView()
+            FlashCardResultsView()
                 .tabItem {
                     Image(systemName: "phone.fill")
                     Text("Flash Card Results")

Toki Trainer/Views/FlashCardResultView.swift

@@ -1,30 +0,0 @@
-//
-//  FlashCardResultView.swift
-//  Toki Trainer
-//
-//  Created by Avery Ada Pace on 11/7/21.
-//
-
-import SwiftUI
-
-struct FlashCardResultView: View {
-    @Environment(\.managedObjectContext) private var viewContext
-    
-    @FetchRequest var flashCardAnswers: FetchedResults<FlashCardAnswer>
-    
-    init() {
-        self._flashCardAnswers = FetchRequest(entity: FlashCardAnswer.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \FlashCardAnswer.word, ascending: true)], predicate: nil, animation: .none)
-    }
-    
-    var body: some View {
-        List(flashCardAnswers, id: \.self) { answer in
-            Text(answer.word ?? "Unknown")
-        }
-    }
-}
-
-struct FlashCardResultView_Previews: PreviewProvider {
-    static var previews: some View {
-        FlashCardResultView()
-    }
-}

Toki Trainer/Views/FlashCardResultsView.swift

@@ -0,0 +1,51 @@
+//
+//  FlashCardResultView.swift
+//  Toki Trainer
+//
+//  Created by Avery Ada Pace on 11/7/21.
+//
+
+import SwiftUI
+
+struct FlashCardResultsView: View {
+    @Environment(\.managedObjectContext) private var viewContext
+
+    @FetchRequest(entity:FlashCardAnswer.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \FlashCardAnswer.word, ascending: false)], predicate: NSPredicate(format: "word == %@", "a")) var flashCardAnswers: FetchedResults<FlashCardAnswer>
+
+    @State private var statistics = 0.0
+    
+    func calculateStatistics() {
+        print("count: \(flashCardAnswers.count)")
+        for answer in flashCardAnswers {
+            if answer.triesCount != 0 {
+                print("word: \(answer.word)")
+                print("tries: \(answer.triesCount)")
+                print("correct: \(answer.correctCount)")
+                self.statistics = Double(answer.correctCount) / Double(answer.triesCount)
+            }
+        }
+    }
+    
+//    func calculateStatistics() {
+//        var correctAnswers = 0
+//        for answer in flashCardAnswers {
+//            if answer.correct {
+//                correctAnswers += 1
+//            }
+//            self.statistics = Double(correctAnswers) / Double(flashCardAnswers.count)
+//        }
+//    }
+    
+    var body: some View {
+        Text("Percentage: \(statistics)")
+            .onAppear {
+                calculateStatistics()
+            }
+    }
+}
+
+struct FlashCardResultView_Previews: PreviewProvider {
+    static var previews: some View {
+        FlashCardResultsView()
+    }
+}

Toki Trainer/Views/FlashCardView.swift

@@ -39,6 +39,8 @@ extension Binding {
 struct FlashCardStack: View {
     @Environment(\.managedObjectContext) private var viewContext
     
+    @FetchRequest(entity:FlashCardAnswer.entity(), sortDescriptors: [NSSortDescriptor(keyPath: \FlashCardAnswer.word, ascending: false)]) var flashCardAnswers: FetchedResults<FlashCardAnswer>
+    
     var dictionary: [TokiDictEntry]
     @State private var flashCards: [FlashCard] = []
     @State private var topFlashCard: FlashCard? = nil
@@ -72,7 +74,6 @@ struct FlashCardStack: View {
         Spacer()
         .onAppear {
             initFlashCards()
-            print(currentFlashCard)
         }
     }
     
@@ -99,18 +100,50 @@ struct FlashCardStack: View {
         flashCardsAreInteractive[currentFlashCard] = true
     }
     
+    func setFlashCardAnswersCoreData(_ correct: Bool) {
+        var cardInDatabase = false
+        for answer in flashCardAnswers {
+            print(answer.word)
+            if answer.word == dictionary[currentFlashCard].word {
+                cardInDatabase = true
+                answer.setValue((answer.triesCount + 1), forKey: "triesCount")
+                if correct {
+                    answer.setValue((answer.correctCount + 1), forKey: "correctCount")
+                }
+                print("answer found in database")
+            }
+        }
+        
+        if cardInDatabase == false {
+            let answer = FlashCardAnswer(context: viewContext)
+            answer.word = dictionary[currentFlashCard].word
+            answer.triesCount = 1
+            if correct {
+                answer.correctCount = 1
+            }
+            print("answer not found in database")
+        }
+        
+//        for answer in flashCardAnswers {
+//            if answer.word == dictionary[currentFlashCard].word {
+//                flashCardAnswer.word = answer.word
+//                flashCardAnswer.triesCount = answer.triesCount + 1
+//                if correct {
+//                    flashCardAnswer.correctCount = answer.correctCount + 1
+//                }
+//            }
+//        }
+        try? viewContext.save()
+    }
+    
     func cardAnswerReceived() {
-        let flashCardAnswer = FlashCardAnswer(context: viewContext)
-        flashCardAnswer.word = dictionary[currentFlashCard].word
         if flashCardsResults[currentFlashCard] == FlashCardResult.Correct {
-            flashCardAnswer.correct = true
+            setFlashCardAnswersCoreData(true)
         } else if flashCardsResults[currentFlashCard] == FlashCardResult.Incorrect {
-            flashCardAnswer.correct = false
+            setFlashCardAnswersCoreData(false)
         } else {
             return
         }
-        try? viewContext.save()
-        
         nextFlashCard()
     }