⚗️ (Navigation): Add programmatic navigation from HomeView

Examples/iOSApp/Sources/Array+SafeIndex.swift

@@ -0,0 +1,18 @@
+// Leka - iOS Monorepo
+// Copyright 2023 APF France handicap
+// SPDX-License-Identifier: Apache-2.0
+
+import Foundation
+
+// TODO(@ladislas): move to UtilsKit
+extension Array {
+
+    subscript(safe index: Int) -> Element? {
+        guard indices.contains(index) else {
+            return nil
+        }
+
+        return self[index]
+    }
+
+}

Examples/iOSApp/Sources/CurriculumListView.swift

@@ -42,7 +42,7 @@ struct CurriculumInfoView: View {
                 }
 
                 Section("List of activities") {
-                    ForEach(Activity.all.filter { curriculum.activities.contains($0.id) }) { activity in
+                    ForEach(curriculum.activities) { activity in
                         NavigationLink(value: activity) {
                             Text(activity.name)
                         }

Examples/iOSApp/Sources/DataModels.swift

@@ -26,9 +26,18 @@ struct Activity: Identifiable, Hashable {
 struct Curriculum: Identifiable, Hashable {
     let id: String
     let name: String
-    let activities: [String]
+    let activities: [Activity]
     let similarCurriculums: [String]?
 
+    init(id: String, name: String, activities: [String], similarCurriculums: [String]?) {
+        self.id = id
+        self.name = name
+        self.activities = activities.compactMap { activityId in
+            Activity.all.first { $0.id == activityId }
+        }
+        self.similarCurriculums = similarCurriculums
+    }
+
     static let all: [Curriculum] = [
         Curriculum(
             id: "curriculum_1", name: "Curriculum 1", activities: ["activity_1", "activity_2", "activity_3"],

Examples/iOSApp/Sources/HomeView.swift

@@ -13,6 +13,53 @@ struct HomeView: View {
             Text( /*@START_MENU_TOKEN@*/"Hello, World!" /*@END_MENU_TOKEN@*/)
                 .font(.largeTitle)
 
+            Button("Go to Activities / Activity 1") {
+                navigation.set(path: Activity.all[0], for: .activities)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.pink)
+
+            Button("Go to Activities / Activity 1 / Activity 2 / Activity 3") {
+                navigation.set(path: Activity.all[0], Activity.all[1], Activity.all[2], for: .activities)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.orange)
+
+            Button("Go to Curriculums / Curriculum 1") {
+                navigation.set(path: Curriculum.all[0], for: .curriculums)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.yellow)
+
+            Button("Go to Curriculums / Curriculum 1 / Activity 2 (w/ objects)") {
+                navigation.set(path: Curriculum.all[0], Curriculum.all[0].activities[1], for: .curriculums)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.purple)
+
+            Button("Go to Curriculums / Curriculum 1 / Activity 2 (w/ id + index)") {
+                navigation.set(curriculum: "curriculum_1", activity: 1)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.indigo)
+
+            Button("Go to Curriculums / Curriculum 1 / Activity -1 (w/ id + index) NOT WORKING") {
+                navigation.set(curriculum: "curriculum_1", activity: -1)
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.red)
+
+            Button("Go to Curriculums / Curriculum 1 / Activity 1 (w/ id + id)") {
+                navigation.set(curriculum: "curriculum_1", activity: "activity_1")
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.mint)
+
+            Button("Go to Curriculums / Curriculum 1 / Activity 1 (w/ id + id) NOT WORKING") {
+                navigation.set(curriculum: "curriculum_1", activity: "bad_id")
+            }
+            .buttonStyle(.borderedProminent)
+            .tint(.red)
         }
         .frame(maxWidth: .infinity, maxHeight: .infinity)
         .background(.cyan)
@@ -21,5 +68,7 @@ struct HomeView: View {
 }
 
 #Preview {
-    HomeView()
+    NavigationStack {
+        HomeView()
+    }
 }

Examples/iOSApp/Sources/Navigation.swift

@@ -30,6 +30,10 @@ class Navigation: ObservableObject {
     var selectedCategory: Category? = .home {
         willSet {
             disableUICompletly = true
+            guard !isProgrammaticNavigation else {
+                print("isProgrammaticNavigation is true, early return to avoid reseting path")
+                return  // ? Note: early return to avoid reseting path
+            }
             backupPath(for: selectedCategory)
         }
         didSet {
@@ -46,6 +50,8 @@ class Navigation: ObservableObject {
         }
     }
 
+    private var isProgrammaticNavigation: Bool = false
+
     private var homeNavPathBackup: NavigationPath = NavigationPath()
     private var activitiesNavPathBackup: NavigationPath = NavigationPath()
     private var curriculumsNavPathBackup: NavigationPath = NavigationPath()
@@ -110,4 +116,75 @@ class Navigation: ObservableObject {
         }
     }
 
+    func set(path newPath: AnyHashable..., for newCategory: Category) {
+        switch newCategory {
+            case .home:
+                break
+            case .activities:
+                activitiesNavPathBackup = newPath.compactMap { $0 as? Activity }
+                    .reduce(into: NavigationPath()) { $0.append($1) }
+            case .curriculums:
+                var localPath = NavigationPath()
+                newPath.forEach {
+                    if let activity = $0 as? Activity {
+                        print("append activity: \(activity)")
+                        localPath.append(activity)
+                    } else if let curriculum = $0 as? Curriculum {
+                        print("append curriculum: \(curriculum)")
+                        localPath.append(curriculum)
+                    } else {
+                        print("append unknown: \($0)")
+                    }
+                }
+                print("localPath: \(localPath)")
+                curriculumsNavPathBackup = localPath
+                print("bckupPath: \(curriculumsNavPathBackup)")
+        }
+
+        underProgrammaticNavigation {
+            select(category: newCategory)
+        }
+    }
+
+    func set(curriculum: String, activity index: Int) {
+        guard let curriculum = Curriculum.all.first(where: { $0.id == curriculum }) else { return }
+        guard let activity = curriculum.activities[safe: index] else { return }
+
+        var localPath = NavigationPath()
+
+        localPath.append(curriculum)
+        localPath.append(activity)
+
+        curriculumsNavPathBackup = localPath
+
+        underProgrammaticNavigation {
+            select(category: .curriculums)
+        }
+    }
+
+    func set(curriculum: String, activity id: String) {
+        guard let curriculum = Curriculum.all.first(where: { $0.id == curriculum }) else { return }
+        guard let activity = curriculum.activities.first(where: { $0.id == id }) else { return }
+
+        print("curri: \(curriculum)")
+        print("activ: \(activity)")
+
+        var localPath = NavigationPath()
+
+        localPath.append(curriculum)
+        localPath.append(activity)
+
+        curriculumsNavPathBackup = localPath
+
+        underProgrammaticNavigation {
+            select(category: .curriculums)
+        }
+    }
+
+    private func underProgrammaticNavigation(_ callback: () -> Void) {
+        isProgrammaticNavigation = true
+        callback()
+        isProgrammaticNavigation = false
+    }
+
 }