feat: new file structure

QuizApp/Models/QuizQuestion.swift

@@ -0,0 +1,51 @@
+//
+//  Topic.swift
+//  QuizApp
+//
+//  Created by Paul on 03.08.25.
+//
+
+import Foundation
+
+struct QuizQuestion: Decodable, Hashable, Identifiable {
+    let id: UUID
+    let question: String
+    let answers: [String]
+    let correctAnswer: Int
+    
+    let type: String?
+    let minValue: Double?
+    let maxValue: Double?
+    let correctValue: Double?
+    let unit: String?
+    
+    // Manuelles Decoding, id wird generiert
+    init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        
+        question = try container.decode(String.self, forKey: .question)
+        
+        // Falls im JSON nicht vorhanden, Standard setzen
+        answers = (try? container.decode([String].self, forKey: .answers)) ?? []
+        correctAnswer = (try? container.decode(Int.self, forKey: .correctAnswer)) ?? 0
+        
+        // Optional
+        type = try container.decodeIfPresent(String.self, forKey: .type)
+        minValue = try container.decodeIfPresent(Double.self, forKey: .minValue)
+        maxValue = try container.decodeIfPresent(Double.self, forKey: .maxValue)
+        correctValue = try container.decodeIfPresent(Double.self, forKey: .correctValue)
+        unit = try container.decodeIfPresent(String.self, forKey: .unit)
+        
+        id = UUID()
+    }
+    
+    private enum CodingKeys: String, CodingKey {
+        case question, answers, correctAnswer
+        case type, minValue, maxValue, correctValue, unit
+    }
+    
+    var isEstimation: Bool {
+        if let t = type?.lowercased() { return t == "estimation" }
+        return !answers.isEmpty ? false : (minValue != nil || maxValue != nil || correctValue != nil)
+    }
+}

QuizApp/ViewModels/ViewModel.swift

@@ -35,7 +35,7 @@ class ViewModel: ObservableObject {
     
     
     init() {
-        guard let url = Bundle.main.url(forResource: "data", withExtension: "json") else {
+        guard let url = Bundle.main.url(forResource: "questions", withExtension: "json") else {
             questions = []
             return
         }
@@ -43,6 +43,7 @@ class ViewModel: ObservableObject {
         do {
             let data = try Data(contentsOf: url)
             allQuestionsByCategory = try JSONDecoder().decode([String: [QuizQuestion]].self, from: data)
+            print("Fragen geladen")
         } catch {
             print("Fehler beim Laden des Inhalts: \(error)")
             allQuestionsByCategory = [:]

QuizApp/Views/ContentView.swift

@@ -20,115 +20,70 @@ struct ContentView: View {
     @State private var playerName: String = ""
     @State private var scoreIsSaved = false
     
+    @State private var estimationValue: Double = 0
+    @State private var estimationSubmitted: Bool = false
+    @State private var estimationPoints: Int = 0
+    
     var body: some View {
         VStack {
             if viewModel.isQuizFinished {
-                VStack(spacing: 20) {
-                    Text("🎉 Quiz beendet!")
-                        .font(.title)
-                    
-                    Text("Dein Ergebnis: \(viewModel.score) von \(viewModel.questions.count) Punkten")
-                        .font(.headline)
-                    
-                    Button("Nochmal spielen") {
-                        restartQuiz()
-                    }
-                    .padding()
-                    .background(Color.blue)
-                    .foregroundColor(.white)
-                    .cornerRadius(10)
-                    
-                    Button("Zurück zur Kategorieauswahl") {
-                        dismiss()
-                        
-                    }
-                    .padding()
-                    .background(Color.gray)
-                    .foregroundColor(.white)
-                    .cornerRadius(10)
-                    
-                    TextField("Dein Name:", text: $playerName)
-                        .textFieldStyle(RoundedBorderTextFieldStyle())
-                        .padding(.horizontal)
-                    
-                    Button("Score speichern") {
+                QuizFinishedView(
+                    score: viewModel.score,
+                    total: viewModel.questions.count,
+                    playerName: $playerName,
+                    onPlayAgain: { restartQuiz() },
+                    onBackToCategories: { dismiss() },
+                    onSaveScore: {
                         saveScore()
                         dismiss()
                     }
-                    .padding()
-                    .background(playerName.isEmpty ? Color.gray : Color.green)
-                    .foregroundColor(.white)
-                    .cornerRadius(10)
-                    .disabled(playerName.isEmpty)
-                }
+                )
                 .onAppear {
                     AudioServicesPlaySystemSound(1322)
                     score += viewModel.score
                 }
             } else if let frage = viewModel.currentQuestion {
-                Text("Punkte: \(viewModel.score)")
-                    .font(.headline)
-                    .padding(.bottom, 10)
                 
-                //Fortschrittsbalken
-                VStack(spacing: 4) {
-                    HStack(spacing: 4) {
-                        ForEach(0..<viewModel.questions.count, id: \.self) { index in
-                            Rectangle()
-                                .fill(colorForAnswer(at: index))
-                                .frame(width: 20, height: index == viewModel.currentQuestionIndex ? 14 : 10)
-                                .cornerRadius(3)
-                        }
-                    }
-                    
-                    Text("Frage \(viewModel.currentQuestionIndex + 1) von \(viewModel.questions.count)")
-                        .font(.caption)
-                        .foregroundColor(.gray)
-                }
-                .padding(.bottom, 10)
+                QuizHeader(
+                    score: viewModel.score,
+                    currentIndex: viewModel.currentQuestionIndex,
+                    total: viewModel.questions.count,
+                    colorForStep: { idx in colorForAnswer(at: idx) } // nutzt deine bestehende Funktion
+                )
                 
                 Text(frage.question)
                     .font(.title)
                     .multilineTextAlignment(.center)
                     .padding()
                 
-                ForEach(frage.answers.indices, id: \.self) { index in
-                    Button(action: {
-                        selectedAnswerIndex = index
-                        isAnswered = true
-                        print("Selected:", index)
-                        print("Correct:", frage.correctAnswer)
-                        viewModel.incrementScore(selectedIndex: index)
+                if frage.isEstimation,
+                   let minV = frage.minValue,
+                   let maxV = frage.maxValue,
+                   let correctV = frage.correctValue {
+                    //  Estimation
+                    EstimationQuestionView(
+                        minValue: minV,
+                        maxValue: maxV,
+                        correctValue: correctV,
+                        unit: frage.unit ?? "",
+                        value: $estimationValue,
+                        submitted: $estimationSubmitted,
+                        gainedPoints: $estimationPoints
+                    ) { gained in
+                        viewModel.score += gained
                         viewModel.answeredCount += 1
-                        viewModel.selectedAnswers[viewModel.currentQuestionIndex] = index
-                    }) {
-                        Text(frage.answers[index])
-                            .padding(.vertical, 12)
-                            .padding(.horizontal, 20)
-                            .frame(maxWidth: 300)
-                            .background(buttonColor(for: index, correctIndex: frage.correctAnswer))
-                            .foregroundColor(.white)
-                            .cornerRadius(10)
-                            .scaleEffect(isAnswered && selectedAnswerIndex == index ? 1.05 : 1.0)
-                            .shadow(radius: isAnswered && selectedAnswerIndex == index ? 5 : 2)
+                        isAnswered = true
                     }
-                    .animation(.easeInOut(duration: 0.3), value: isAnswered)
-                    .disabled(isAnswered)
                     
-                }
-                VStack {
-                    if isAnswered {
-                        Text(selectedAnswerIndex == frage.correctAnswer ? "✅ Richtig!" : "❌ Falsch")
-                            .font(.headline)
-                            .foregroundColor(selectedAnswerIndex == frage.correctAnswer ? .green : .red)
-                            .padding()
-                    }
-                    if isAnswered {
-                        Button(action: {
+                    if estimationSubmitted {
+                        Button {
                             viewModel.loadNextQuestion()
-                            selectedAnswerIndex = nil
+                            // Reset für nächste Estimation
+                            estimationSubmitted = false
                             isAnswered = false
-                        }) {
+                            selectedAnswerIndex = nil
+                            estimationPoints = 0
+                        } label: {
                             Text("Nächste Frage")
                                 .font(.headline)
                                 .padding(.vertical, 10)
@@ -137,9 +92,33 @@ struct ContentView: View {
                                 .foregroundColor(.white)
                                 .cornerRadius(10)
                         }
+                        .padding(.top, 8)
                     }
+                    
+                } else {
+                    // Multiple-Choice
+                    MultipleChoiceQuestionView(
+                        answers: frage.answers,
+                        correctIndex: frage.correctAnswer,
+                        selectedIndex: $selectedAnswerIndex,
+                        isAnswered: $isAnswered,
+                        onAnswer: { index in
+                            print("Selected:", index)
+                            print("Correct:", frage.correctAnswer)
+                            viewModel.incrementScore(selectedIndex: index)
+                            viewModel.answeredCount += 1
+                            viewModel.selectedAnswers[viewModel.currentQuestionIndex] = index
+                        },
+                        buttonColor: { idx, correct in
+                            buttonColor(for: idx, correctIndex: correct)
+                        },
+                        onNext: {
+                            viewModel.loadNextQuestion()
+                            selectedAnswerIndex = nil
+                            isAnswered = false
+                        }
+                    )
                 }
-                .frame(height: 100)
             } else {
                 Text("Fragen werden geladen...")
             }
@@ -234,6 +213,17 @@ struct ContentView: View {
         
         print("Score gespeichert: \(playerName) - \(viewModel.score) Punkte")
     }
+    
+    private func pointsForEstimation(guess: Double, correct: Double, minValue: Double, maxValue: Double, maxPoints: Int = 3, thresholdPercent: Double = 0.3) -> Int {
+        let span = maxValue - minValue
+        guard span > 0 else { return 0 }
+        let absError = abs(guess - correct)
+        let relError = absError / span
+        if relError >= thresholdPercent { return 0 }
+        let ratio = 1.0 - (relError / thresholdPercent)
+        return max(0, Int(round(Double(maxPoints) * ratio)))
+    }
+    
 }
 
 #Preview {

QuizApp/Views/EstimationQuestionView.swift

@@ -0,0 +1,99 @@
+//
+//  EstimationQuestionView.swift
+//  QuizApp
+//
+//  Created by Paul on 08.08.25.
+//
+
+import SwiftUI
+
+struct EstimationQuestionView: View {
+    let minValue: Double
+    let maxValue: Double
+    let correctValue: Double
+    let unit: String
+    
+    @Binding var value: Double
+    @Binding var submitted: Bool
+    @Binding var gainedPoints: Int
+    let onSubmit: (Int) -> Void
+    
+    var body: some View {
+        VStack(spacing: 16) {
+            Slider(
+                value: Binding(
+                    get: { value },
+                    set: { value = min(max($0, minValue), maxValue) } // clamp
+                ),
+                in: minValue...maxValue,
+                step: (maxValue - minValue) > 200 ? 1 : 0.5
+            )
+            .onAppear {
+                if value < minValue || value > maxValue {
+                    value = (minValue + maxValue) / 2
+                }
+            }
+            
+            HStack {
+                Text("\(Int(minValue)) \(unit)")
+                Spacer()
+                Text("\(Int(value)) \(unit)").font(.headline)
+                Spacer()
+                Text("\(Int(maxValue)) \(unit)")
+            }
+            .font(.caption)
+            
+            if !submitted {
+                Button {
+                    gainedPoints = pointsForEstimation(
+                        guess: value,
+                        correct: correctValue,
+                        minValue: minValue,
+                        maxValue: maxValue
+                    )
+                    submitted = true
+                    onSubmit(gainedPoints)
+                } label: {
+                    Text("Antwort abgeben")
+                        .font(.headline)
+                        .padding(.vertical, 10)
+                        .padding(.horizontal, 30)
+                        .background(Color.blue)
+                        .foregroundColor(.white)
+                        .cornerRadius(10)
+                }
+            } else {
+                let diff = abs(value - correctValue)
+                let span = maxValue - minValue
+                let rel = span > 0 ? (diff / span) : 1.0
+                
+                Text("✅ Richtiger Wert: \(Int(correctValue)) \(unit)")
+                    .font(.headline)
+                    .foregroundColor(.green)
+                Text("Dein Tipp: \(Int(value)) \(unit) — Abweichung: \(Int(diff)) \(unit) (~\(Int(rel*100))%)")
+                    .font(.subheadline)
+                    .foregroundColor(.secondary)
+                Text("Erhaltene Punkte: \(gainedPoints)")
+                    .font(.headline)
+            }
+        }
+        .padding(.horizontal)
+    }
+}
+
+private func pointsForEstimation(
+    guess: Double,
+    correct: Double,
+    minValue: Double,
+    maxValue: Double,
+    maxPoints: Int = 3,
+    thresholdPercent: Double = 0.3
+) -> Int {
+    let span = maxValue - minValue
+    guard span > 0 else { return 0 }
+    let absError = abs(guess - correct)
+    let relError = absError / span
+    if relError >= thresholdPercent { return 0 }
+    let ratio = 1.0 - (relError / thresholdPercent)
+    return max(0, Int(round(Double(maxPoints) * ratio)))
+}

QuizApp/Views/MultipleChoiceQuestionView.swift

@@ -0,0 +1,66 @@
+//
+//  MultipleChoiceQuestionView.swift
+//  QuizApp
+//
+//  Created by Paul on 08.08.25.
+//
+
+import SwiftUI
+
+struct MultipleChoiceQuestionView: View {
+    let answers: [String]
+    let correctIndex: Int
+    @Binding var selectedIndex: Int?
+    @Binding var isAnswered: Bool
+    let onAnswer: (Int) -> Void
+    let buttonColor: (Int, Int) -> Color
+    
+    let onNext: () -> Void
+    
+    var body: some View {
+        VStack {
+            ForEach(answers.indices, id: \.self) { index in
+                Button {
+                    selectedIndex = index
+                    isAnswered = true
+                    onAnswer(index)
+                } label: {
+                    Text(answers[index])
+                        .padding(.vertical, 12)
+                        .padding(.horizontal, 20)
+                        .frame(maxWidth: 300)
+                        .background(buttonColor(index, correctIndex))
+                        .foregroundColor(.white)
+                        .cornerRadius(10)
+                        .scaleEffect(isAnswered && selectedIndex == index ? 1.05 : 1.0)
+                        .shadow(radius: isAnswered && selectedIndex == index ? 5 : 2)
+                }
+                .animation(.easeInOut(duration: 0.3), value: isAnswered)
+                .disabled(isAnswered)
+            }
+            
+            VStack {
+                if isAnswered, let selected = selectedIndex {
+                    let correct = (selected == correctIndex)
+                    Text(correct ? "✅ Richtig!" : "❌ Falsch")
+                        .font(.headline)
+                        .foregroundColor(correct ? .green : .red)
+                        .padding()
+                }
+                if isAnswered {
+                    Button(action: onNext) {
+                        Text("Nächste Frage")
+                            .font(.headline)
+                            .padding(.vertical, 10)
+                            .padding(.horizontal, 30)
+                            .background(Color.blue)
+                            .foregroundColor(.white)
+                            .cornerRadius(10)
+                    }
+                }
+            }
+            .frame(height: 100)
+        }
+    }
+}
+

QuizApp/Views/QuizFinishedView.swift

@@ -0,0 +1,50 @@
+//
+//  QuizFinishedView.swift
+//  QuizApp
+//
+//  Created by Paul on 08.08.25.
+//
+
+import SwiftUI
+
+struct QuizFinishedView: View {
+    let score: Int
+    let total: Int
+    @Binding var playerName: String
+    let onPlayAgain: () -> Void
+    let onBackToCategories: () -> Void
+    let onSaveScore: () -> Void
+    
+    var body: some View {
+        VStack(spacing: 20) {
+            Text("🎉 Quiz beendet!")
+                .font(.title)
+            
+            Text("Dein Ergebnis: \(score) von \(total) Punkten")
+                .font(.headline)
+            
+            Button("Nochmal spielen", action: onPlayAgain)
+                .padding()
+                .background(Color.blue)
+                .foregroundColor(.white)
+                .cornerRadius(10)
+            
+            Button("Zurück zur Kategorieauswahl", action: onBackToCategories)
+                .padding()
+                .background(Color.gray)
+                .foregroundColor(.white)
+                .cornerRadius(10)
+            
+            TextField("Dein Name:", text: $playerName)
+                .textFieldStyle(RoundedBorderTextFieldStyle())
+                .padding(.horizontal)
+            
+            Button("Score speichern", action: onSaveScore)
+                .padding()
+                .background(playerName.isEmpty ? Color.gray : Color.green)
+                .foregroundColor(.white)
+                .cornerRadius(10)
+                .disabled(playerName.isEmpty)
+        }
+    }
+}

QuizApp/Views/QuizHeaderView.swift

@@ -0,0 +1,36 @@
+//
+//  QuizHeaderView.swift
+//  QuizApp
+//
+//  Created by Paul on 08.08.25.
+//
+
+import SwiftUI
+
+struct QuizHeader: View {
+    let score: Int
+    let currentIndex: Int
+    let total: Int
+    let colorForStep: (Int) -> Color
+    
+    var body: some View {
+        VStack(spacing: 8) {
+            Text("Punkte: \(score)")
+                .font(.headline)
+            
+            HStack(spacing: 4) {
+                ForEach(0..<total, id: \.self) { idx in
+                    Rectangle()
+                        .fill(colorForStep(idx))
+                        .frame(width: 20, height: idx == currentIndex ? 14 : 10)
+                        .cornerRadius(3)
+                }
+            }
+            
+            Text("Frage \(currentIndex + 1) von \(total)")
+                .font(.caption)
+                .foregroundColor(.gray)
+        }
+        .padding(.bottom, 10)
+    }
+}