Added tabs and a grocery list

Nextcloud Cookbook iOS Client/Views/Tabs/GroceryListTabView.swift

@@ -0,0 +1,118 @@
+//
+//  GroceryListTabView.swift
+//  Nextcloud Cookbook iOS Client
+//
+//  Created by Vincent Meilinger on 23.01.24.
+//
+
+import Foundation
+import SwiftUI
+
+
+struct GroceryListTabView: View {
+    var body: some View {
+        NavigationStack {
+            if GroceryList.shared.listItems.isEmpty {
+                List {
+                    Text("You're all set for cooking 🍓")
+                        .font(.title2)
+                        .foregroundStyle(.secondary)
+                    Text("Add groceries to this list by either using the button next to an ingredient list in a recipe, or by swiping right on individual ingredients of a recipe.")
+                        
+                        .foregroundStyle(.secondary)
+                }
+                .padding()
+                .navigationTitle("Grocery List")
+            } else {
+                List(GroceryList.shared.listItems) { item in
+                    HStack(alignment: .top) {
+                        if item.isChecked {
+                            Image(systemName: "checkmark.circle")
+                        } else {
+                            Image(systemName: "circle")
+                        }
+                        
+                        Text("\(item.name)")
+                            .multilineTextAlignment(.leading)
+                            .lineLimit(5)
+                    }
+                    .foregroundStyle(item.isChecked ? Color.secondary : Color.primary)
+                    .onTapGesture {
+                        item.isChecked.toggle()
+                    }
+                    .animation(.easeInOut, value: item.isChecked)
+                    .swipeActions(edge: .trailing, allowsFullSwipe: true) {
+                        Button {
+                            GroceryList.shared.removeItem(item.name)
+                        } label: {
+                            Label("Delete", systemImage: "trash")
+                        }
+                        .tint(.red)
+                    }
+                }
+                .padding()
+                .navigationTitle("Grocery List")
+            }
+            
+        }
+    }
+}
+
+
+
+class GroceryListItem: ObservableObject, Identifiable, Codable {
+    var name: String
+    var isChecked: Bool
+    
+    init(_ name: String, isChecked: Bool = false) {
+        self.name = name
+        self.isChecked = isChecked
+    }
+}
+
+
+
+class GroceryList: ObservableObject {
+    static let shared: GroceryList = GroceryList()
+    
+    let dataStore: DataStore = DataStore()
+    @Published var listItems: [GroceryListItem] = []
+    
+    
+    func addItem(_ name: String) {
+        listItems.append(GroceryListItem(name))
+        save()
+    }
+    
+    func addItems(_ items: [String]) {
+        for item in items {
+            addItem(item)
+        }
+        save()
+    }
+    
+    func removeItem(_ name: String) {
+        guard let ix = listItems.firstIndex(where: { item in
+            item.name == name
+        }) else { return }
+        listItems.remove(at: ix)
+        save()
+    }
+    
+    func save() {
+        Task {
+            await dataStore.save(data: listItems, toPath: "grocery_list.data")
+        }
+    }
+    
+    func load() async {
+        do {
+            guard let listItems: [GroceryListItem] = try await dataStore.load(
+                fromPath: "grocery_list.data"
+            ) else { return }
+            self.listItems = listItems
+        } catch {
+            print("Unable to load grocery list")
+        }
+    }
+}