Add countdown till when the next flashcard is going to show up

WordAX.xcodeproj/project.pbxproj

@@ -20,6 +20,7 @@
 		6CEF7F812BC4694900E205F6 /* WordAXCD.xcdatamodeld in Sources */ = {isa = PBXBuildFile; fileRef = 6CEF7F7F2BC4694900E205F6 /* WordAXCD.xcdatamodeld */; };
 		6CEF7F842BC46B5900E205F6 /* Flashcard+CoreDataClass.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6CEF7F822BC46B5900E205F6 /* Flashcard+CoreDataClass.swift */; };
 		6CEF7FA32BC88F6000E205F6 /* Flashcard+CoreDataProperties.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6CEF7FA12BC88F6000E205F6 /* Flashcard+CoreDataProperties.swift */; };
+		6CEF7FA62BC96F2B00E205F6 /* ButtonHStackView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6CEF7FA52BC96F2B00E205F6 /* ButtonHStackView.swift */; };
 		6CF439522B83541D004C3543 /* WordAXApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6CF439512B83541D004C3543 /* WordAXApp.swift */; };
 		6CF439542B83541D004C3543 /* MainView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6CF439532B83541D004C3543 /* MainView.swift */; };
 		6CF439562B83541E004C3543 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 6CF439552B83541E004C3543 /* Assets.xcassets */; };
@@ -42,6 +43,8 @@
 		6CEF7F962BC6B45F00E205F6 /* WordAX0.0.1.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = WordAX0.0.1.xcdatamodel; sourceTree = "<group>"; };
 		6CEF7F9F2BC88F3900E205F6 /* WordAX0.0.2.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = WordAX0.0.2.xcdatamodel; sourceTree = "<group>"; };
 		6CEF7FA12BC88F6000E205F6 /* Flashcard+CoreDataProperties.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Flashcard+CoreDataProperties.swift"; sourceTree = "<group>"; };
+		6CEF7FA42BC95F0300E205F6 /* WordAX0.0.3.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = WordAX0.0.3.xcdatamodel; sourceTree = "<group>"; };
+		6CEF7FA52BC96F2B00E205F6 /* ButtonHStackView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ButtonHStackView.swift; sourceTree = "<group>"; };
 		6CF4394E2B83541D004C3543 /* WordAX.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = WordAX.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6CF439512B83541D004C3543 /* WordAXApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WordAXApp.swift; sourceTree = "<group>"; };
 		6CF439532B83541D004C3543 /* MainView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MainView.swift; sourceTree = "<group>"; };
@@ -70,6 +73,7 @@
 				6C81850B2B8BA6BC0033CF46 /* FlashCardListRowView.swift */,
 				6C8185012B88C9FB0033CF46 /* SettingsView.swift */,
 				6C8185032B88CA210033CF46 /* AnkiView.swift */,
+				6CEF7FA52BC96F2B00E205F6 /* ButtonHStackView.swift */,
 				6C8185052B8A537F0033CF46 /* FlashCardView.swift */,
 			);
 			path = Views;
@@ -200,6 +204,7 @@
 				6C8185062B8A537F0033CF46 /* FlashCardView.swift in Sources */,
 				6CEF7FA32BC88F6000E205F6 /* Flashcard+CoreDataProperties.swift in Sources */,
 				6C81850A2B8BA5740033CF46 /* FlashCardListView.swift in Sources */,
+				6CEF7FA62BC96F2B00E205F6 /* ButtonHStackView.swift in Sources */,
 				6C8185002B88C9660033CF46 /* WordAXModelView.swift in Sources */,
 				6C8185042B88CA210033CF46 /* AnkiView.swift in Sources */,
 				6CEF7F7D2BC457E600E205F6 /* DataController.swift in Sources */,
@@ -419,6 +424,7 @@
 		6CEF7F7F2BC4694900E205F6 /* WordAXCD.xcdatamodeld */ = {
 			isa = XCVersionGroup;
 			children = (
+				6CEF7FA42BC95F0300E205F6 /* WordAX0.0.3.xcdatamodel */,
 				6CEF7F9F2BC88F3900E205F6 /* WordAX0.0.2.xcdatamodel */,
 				6CEF7F962BC6B45F00E205F6 /* WordAX0.0.1.xcdatamodel */,
 				6CEF7F802BC4694900E205F6 /* WordAX.xcdatamodel */,

WordAX/Model/DataController.swift

@@ -33,6 +33,7 @@ class DataController: ObservableObject {
             flashcard.lastSeenOn  = [Date().addingTimeInterval([86400, 24000, 100000].randomElement()!)].randomElement()!
             flashcard.shownCount = [0, 1, 2, 3, 4, 5].randomElement()!
             flashcard.dateAdded = [Date(), Date().addingTimeInterval(-86400), Date().addingTimeInterval(-172800)].randomElement()!
+//            flashcard.calculatedNextRepetition = flashcard.lastSeenOn ?? Date() + TimeInterval(flashcard.nextSpacedRepetitionMilestone)
         }
         do {
             try viewContext.save()

WordAX/Model/Flashcard+CoreDataClass.swift

@@ -11,6 +11,25 @@ import CoreData
 
 @objc(Flashcard)
 public class Flashcard: NSManagedObject {
+    
+    @objc dynamic var calculatedNextRepetition: Date {
+        if lastSeenOn != nil {
+            return lastSeenOn!.addSpacedRepetitionMilestone(milestone: self.getSpacedRepetitionMilestone())
+        } else {
+            return Date()
+        }
+    }
+    override public class func keyPathsForValuesAffectingValue(forKey key: String) -> Set<String> {
+//    public override func value(forKey key: String) -> Any? {
+        let keyPaths = super.keyPathsForValuesAffectingValue(forKey: key)
+        if key == "calculatedNextRepetition" {
+            return keyPaths.union(Set(["lastSeenOn", "nextSpacedRepetitionMilestone"]))
+        } else {
+            return keyPaths
+        }
+    }
+    
+
     enum SpacedRepetitionMilestoneEnum: Int64, CaseIterable {
         case Now = 0 // starting value
         case OneMinute = 60 // 60 * 1
@@ -31,28 +50,28 @@ public class Flashcard: NSManagedObject {
         static func getNext(milestone: SpacedRepetitionMilestoneEnum?) -> SpacedRepetitionMilestoneEnum {
             let sorted = SpacedRepetitionMilestoneEnum.allCasesSorted
             if milestone == nil {
-                return SpacedRepetitionMilestoneEnum.TenMinutes
+                return .TenMinutes
             }
             let milestoneIndex = sorted.firstIndex(where: {$0.rawValue == milestone!.rawValue})!
             if milestoneIndex < SpacedRepetitionMilestoneEnum.allCasesSorted.count {
                 return sorted[milestoneIndex + 1]
             }
-            return SpacedRepetitionMilestoneEnum.OneYear
+            return .OneYear
         }
         
         static func getMilestoneFromInt(value: Int64) -> SpacedRepetitionMilestoneEnum {
-            return SpacedRepetitionMilestoneEnum.allCasesSorted.first(where: {$0.rawValue == value}) ?? SpacedRepetitionMilestoneEnum.Now
+            return .allCasesSorted.first(where: {$0.rawValue == value}) ?? .Now
         }
         
     }
     
-    public override func didChangeValue(forKey key: String) {
+//    public override func didChangeValue(forKey key: String) {
-        super.didChangeValue(forKey: key)
+//        super.didChangeValue(forKey: key)
-        if key == "lastSeenOn" || key == "nextSpacedRepetitionMilestone" {
+//        if key == "lastSeenOn" || key == "nextSpacedRepetitionMilestone" {
-            //            updateCalculatedNextRepetition()
+//            //            updateCalculatedNextRepetition()
-            calculatedNextRepetition = lastSeenOn ?? Date() + TimeInterval(nextSpacedRepetitionMilestone)
+//            calculatedNextRepetition = lastSeenOn ?? Date() + TimeInterval(nextSpacedRepetitionMilestone)
-        }
+//        }
-    }
+//    }
     
     //    func updateCalculatedNextRepetition() {
     //        if let lastSeen = lastSeenOn {

WordAX/Model/Flashcard+CoreDataProperties.swift

@@ -24,8 +24,6 @@ extension Flashcard {
     @NSManaged public var nextSpacedRepetitionMilestone: Int64
     @NSManaged public var shown: Bool
     @NSManaged public var shownCount: Int64
-    @NSManaged public var calculatedNextRepetition: Date?
-
 }
 
 extension Flashcard : Identifiable {

WordAX/Model/WordAXCD.xcdatamodeld/WordAX0.0.3.xcdatamodel/contents

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<model type="com.apple.IDECoreDataModeler.DataModel" documentVersion="1.0" lastSavedToolsVersion="22757" systemVersion="23D60" minimumToolsVersion="Automatic" sourceLanguage="Swift" usedWithSwiftData="YES" userDefinedModelVersionIdentifier="">
+    <entity name="Flashcard" representedClassName="Flashcard" syncable="YES">
+        <attribute name="dateAdded" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="desc" optional="YES" attributeType="String"/>
+        <attribute name="id" optional="YES" attributeType="UUID" usesScalarValueType="NO"/>
+        <attribute name="lastSeenOn" optional="YES" attributeType="Date" usesScalarValueType="NO"/>
+        <attribute name="name" optional="YES" attributeType="String"/>
+        <attribute name="nextSpacedRepetitionMilestone" optional="YES" attributeType="Integer 64" defaultValueString="0" usesScalarValueType="YES"/>
+        <attribute name="shown" optional="YES" attributeType="Boolean" usesScalarValueType="YES"/>
+        <attribute name="shownCount" optional="YES" attributeType="Integer 64" defaultValueString="0" usesScalarValueType="YES"/>
+    </entity>
+</model>

WordAX/Views/AnkiView.swift

@@ -21,19 +21,18 @@ struct AnkiView: View {
         ]),
         NSPredicate(format: "lastSeenOn == nil")
     ])) var flashcards: FetchedResults<Flashcard>
-    @FetchRequest(
+    
-        sortDescriptors: [
+    @State private var timeRemaining = 10
-            NSSortDescriptor(key: "calculatedNextRepetition", ascending: false)
+    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
-        ],
+    @State var sortedFlashcards: [Flashcard] = []
-          predicate:
+    
-            NSCompoundPredicate(type: .and, subpredicates: [
+    @Environment(\.colorScheme) var colorScheme
-                NSPredicate(format: "%K != nil", "lastSeenOn"),
-            NSPredicate(
-                format: "lastSeenOn + nextSpacedRepetitionMilestone > %@", Date() as CVarArg)
-                ]
-    )) var soonestFlashcard: FetchedResults<Flashcard>
 
+    
     // get the most recent flashcard
+    @FetchRequest(sortDescriptors: [],
+          predicate: NSPredicate(format: "%K != nil", "lastSeenOn")) var soonestFlashcard: FetchedResults<Flashcard>
+
     
     @State var showDescription = false
     
@@ -86,62 +85,32 @@ struct AnkiView: View {
                 }
             }
         } else {
-            // TODO: Add countdown to the next available word
+            if !soonestFlashcard.isEmpty {
-            VStack{
+                Text("Next flashcard in: \(timeRemaining.convertDurationSecondsToCountdown())")
-                if !soonestFlashcard.isEmpty {
+                    .foregroundStyle(.black)
-                    Text("Time: \(timeRemaining.convertDurationSecondsToCountdown())")
-                        .foregroundStyle(.white)
-                        .padding(.horizontal, 20)
-                        .padding(.vertical, 5)
-                        .background(.black.opacity(0.75))
-                        .clipShape(.capsule)
-                }
-                
-//                if !soonestFlashcard.isEmpty {
-//                    Text("HERE")
-//                    Text("\(soonestFlashcard.first!.lastSeenOn!.addingTimeInterval(TimeInterval(soonestFlashcard.first!.nextSpacedRepetitionMilestone)).timeIntervalSince(Date()))")
-//                    Text("\(Int64(timeRemaining))")
-//                    Text("\(soonestFlashcard.first!.lastSeenOn!)")
-//                    Text("\(soonestFlashcard.first!.getSpacedRepetitionMilestone().rawValue)")
-//                    Text("\(soonestFlashcard.first!.lastSeenOn!.addSpacedRepetitionMilestone(milestone: soonestFlashcard.first!.getSpacedRepetitionMilestone()))")
-//                }
-//                if soonestFlashcard.first! {
-//                    Text("HERE")
-//                }
-                
-                Text("There are currently no words to display")
                     .padding()
                     .background(.yellow)
                     .clipShape(.buttonBorder)
-            }
+                    .padding(.vertical, 50)
-            .onAppear {
+                    .padding(.horizontal)
-                if !soonestFlashcard.isEmpty {
+                    .background(.gray.opacity(0.3))
-                    var lastSeen = soonestFlashcard.first!.lastSeenOn!
+                    .clipShape(.buttonBorder)
-                    var showIn = soonestFlashcard.first!.getSpacedRepetitionMilestone()
+                    .onAppear {
-                    var show = lastSeen.addSpacedRepetitionMilestone(milestone: showIn)
+                        if !soonestFlashcard.isEmpty {
-                    timeRemaining = Int(show.timeIntervalSinceNow)
+                            sortedFlashcards = soonestFlashcard.sorted(by: {
-                }
+                                ($0.lastSeenOn!.addSpacedRepetitionMilestone(milestone:$0.getSpacedRepetitionMilestone()).timeIntervalSinceNow) < ($1.lastSeenOn!.addSpacedRepetitionMilestone(milestone: $1.getSpacedRepetitionMilestone()).timeIntervalSinceNow)
-            }
+                            })
-            .onReceive(timer) { time in
+                            timeRemaining = Int(sortedFlashcards.first!.lastSeenOn!.addSpacedRepetitionMilestone(milestone:sortedFlashcards.first!.getSpacedRepetitionMilestone()).timeIntervalSinceNow)
-                if !soonestFlashcard.isEmpty {
+                        }
-                    var lastSeen = soonestFlashcard.first!.lastSeenOn!
+                    }
-                    var showIn = soonestFlashcard.first!.getSpacedRepetitionMilestone()
+                    .onReceive(timer) { time in
-                    var show = lastSeen.addSpacedRepetitionMilestone(milestone: showIn)
+                        if timeRemaining > 0 {
-                    timeRemaining = Int(show.timeIntervalSinceNow)
+                            timeRemaining -= 1
-                }
+                        }
-//                timeRemaining = Int(soonestFlashcard.first!.lastSeenOn!.addSpacedRepetitionMilestone(milestone: soonestFlashcard.first!.getSpacedRepetitionMilestone()).timeIntervalSince(Date()))
+                    }
-//                timeRemaining = Int(soonestFlashcard.first!.lastSeenOn!.addingTimeInterval(TimeInterval(soonestFlashcard.first!.nextSpacedRepetitionMilestone)).timeIntervalSince(Date()))
-//                if timeRemaining > 0 {
-//                    timeRemaining -= 1
-//                }
-//                if !soonestFlashcard.isEmpty {
-//                    timeRemaining = Int(Date().timeIntervalSince(soonestFlashcard.first!.lastSeenOn!))
-//                }
             }
         }
     }
-    @State private var timeRemaining = 10
-    let timer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
 }
 
 #Preview {