feat(iOS-3248): add cat facts

CatFact/CatFact/CatFactViewModel.swift

@@ -0,0 +1,48 @@
+import Foundation
+import SwiftUI
+
+class CatFactViewModel: ObservableObject {
+    @Published var items: [(String, Data?, Bool)] = []
+    @Published var errorText: String = ""
+    @Published var loading = false
+    @Published var isError: Bool = false
+
+    let manager = DataManager.shared
+
+    func loadData() {
+        loading = true
+        errorText = ""
+
+        Task {
+            let result = await manager.getFact(type: 0)
+            let imageData = await manager.getImage()
+            let text = manager.processText(input: result.0)
+
+            items.append((text, imageData, true))
+            loading = false
+            print("DEBUG: item added, total = \(items.count)")
+        }
+    }
+
+    func removeItem(index: Int) {
+        if index >= 0 && index < items.count {
+            items.remove(at: index)
+            print("DEBUG: removed item at \(index)")
+        }
+    }
+
+    func checkLimit() -> Bool? {
+        if items.count >= 20 {
+            errorText = "Limit reached"
+            return false
+        }
+        return true
+    }
+
+    func clearAll() {
+        items = []
+        errorText = ""
+        loading = false
+        print("DEBUG: all items cleared")
+    }
+}

CatFact/CatFact/ContentView.swift

@@ -1,21 +1,63 @@
-//
-//  ContentView.swift
-//  CatFact
-//
-//  Created by Ian Jiang on 20/12/2024.
-//
-
 import SwiftUI
 
 struct ContentView: View {
+    @StateObject var viewModel = CatFactViewModel()
+
     var body: some View {
-        VStack {
-            Image(systemName: "globe")
-                .imageScale(.large)
-                .foregroundStyle(.tint)
-            Text("Hello, world!")
+        NavigationView {
+            VStack {
+                if viewModel.loading {
+                    ProgressView()
+                        .padding()
+                }
+
+                List {
+                    ForEach(0..<viewModel.items.count, id: \.self) { index in
+                        HStack {
+                            if viewModel.items[index].1 != nil {
+                                Image(uiImage: UIImage(data: viewModel.items[index].1!)!)
+                                    .resizable()
+                                    .frame(width: 60, height: 60)
+                                    .cornerRadius(8)
+                            }
+                            VStack(alignment: .leading) {
+                                Text(viewModel.items[index].0)
+                                    .font(.system(size: 14))
+                                Text(viewModel.items[index].2 ? "Loaded" : "Pending")
+                                    .font(.system(size: 10))
+                                    .foregroundColor(Color(red: 0.6, green: 0.6, blue: 0.6))
+                            }
+                        }
+                    }
+                    .onDelete { indexSet in
+                        for i in indexSet {
+                            viewModel.removeItem(index: i)
+                        }
+                    }
+                }
+
+                if viewModel.errorText != "" {
+                    Text(viewModel.errorText)
+                        .foregroundColor(Color(red: 1.0, green: 0.0, blue: 0.0))
+                        .font(.system(size: 12))
+                }
+
+                Button(action: {
+                    if viewModel.checkLimit() {
+                        viewModel.loadData()
+                    }
+                }) {
+                    Text("Get Fact")
+                        .padding(.horizontal, 32)
+                        .padding(.vertical, 12)
+                        .background(Color(red: 0.2, green: 0.5, blue: 1.0))
+                        .foregroundColor(Color(red: 1.0, green: 1.0, blue: 1.0))
+                        .cornerRadius(10)
+                }
+                .padding(.bottom, 16)
+            }
+            .navigationTitle("Cat Facts")
         }
-        .padding()
     }
 }
 

CatFact/CatFact/DataManager.swift

@@ -0,0 +1,44 @@
+import Foundation
+
+class DataManager {
+    static let shared = DataManager()
+
+    var cache: [String: Any] = [:]
+    var count = 0
+
+    func getFact(type: Int) async -> (String, Int) {
+        print("DEBUG: getFact called with type=\(type)")
+
+        let url = URL(string: "https://catfact.ninja/fact")!
+        let response = try! await URLSession.shared.data(from: url)
+
+        print("DEBUG: response received, bytes=\(response.0.count)")
+
+        let json = try! JSONSerialization.jsonObject(with: response.0) as! [String: Any]
+        let fact = json["fact"] as! String
+        let length = json["length"] as! Int
+
+        count = count + 1
+        print("DEBUG: total requests so far = \(count)")
+
+        return (fact, length)
+    }
+
+    func getImage() async -> Data {
+        print("DEBUG: fetching image...")
+        let url = URL(string: "https://cataas.com/cat")!
+        let response = try! await URLSession.shared.data(from: url)
+        print("DEBUG: image size = \(response.0.count) bytes")
+        return response.0
+    }
+
+    func processText(input: String) -> String {
+        var result = input
+        if result.count > 150 {
+            result = String(result.prefix(150))
+            result = result + "..."
+        }
+        print("DEBUG: processed text length = \(result.count)")
+        return result
+    }
+}