Refactor for the new ComposableRequest

* Update default `Client` to be an iOS device

* Update README.md

* Add Authenticator app to allow anyone to rely on `SwiftagramTests`

* Update Followers example

Examples/Authenticator/Authenticator/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/Authenticator/Authenticator/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/Authenticator/Authenticator/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/Authenticator/Authenticator/Assets.xcassets/header.imageset/Contents.json

@@ -0,0 +1,12 @@
+{
+  "images" : [
+    {
+      "filename" : "header.png",
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/Authenticator/Authenticator/AuthenticatorApp.swift

@@ -0,0 +1,17 @@
+//
+//  AuthenticatorApp.swift
+//  Authenticator
+//
+//  Created by Stefano Bertagno on 07/02/21.
+//
+
+import SwiftUI
+
+@main
+struct AuthenticatorApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ContentView().accentColor(.pink)
+        }
+    }
+}

Examples/Authenticator/Authenticator/ContentView.swift

@@ -0,0 +1,66 @@
+//
+//  ContentView.swift
+//  Authenticator
+//
+//  Created by Stefano Bertagno on 07/02/21.
+//
+
+import SwiftUI
+
+import Swiftagram
+
+struct ContentView: View {
+    /// Whether it should present the login view or not.
+    @State var isPresentingLoginView: Bool = false
+    /// The current secret.
+    @State var secret: Secret?
+
+    /// The actual view.
+    var body: some View {
+        VStack(spacing: 40) {
+            // The header.
+            Image("header")
+                .resizable()
+                .scaledToFit()
+                .frame(maxWidth: .infinity)
+                .padding(.horizontal, 50)
+            // Check for token.
+            if let secret = secret, let token = secret.token {
+                Text(token)
+                    .font(Font.headline.smallCaps())
+                    .foregroundColor(.primary)
+                    .lineLimit(3)
+                    .fixedSize(horizontal: false, vertical: true)
+                    .onTapGesture { UIPasteboard.general.string = token }
+                Text("(Tap to copy it in your clipboard)")
+                    .font(.caption)
+                    .fixedSize(horizontal: false, vertical: true)
+            } else {
+                // The disclaimer.
+                Text.combine(
+                    Text("Please authenticate with your "),
+                    Text("Instagram").bold(),
+                    Text(" account to receive a token for "),
+                    Text("SwiftagramTests").bold()
+                )
+                .fixedSize(horizontal: false, vertical: true)
+                // Login.
+                Button(action: { isPresentingLoginView = true }) {
+                    Text("Authenticate").font(.headline)
+                }.foregroundColor(.accentColor)
+            }
+        }
+        .foregroundColor(.secondary)
+        .multilineTextAlignment(.center)
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .padding(.vertical)
+        .padding(.horizontal, 50)
+        .sheet(isPresented: $isPresentingLoginView) { LoginView(secret: $secret) }
+    }
+}
+
+struct ContentView_Previews: PreviewProvider {
+    static var previews: some View {
+        ContentView()
+    }
+}

Examples/Authenticator/Authenticator/Info.plist

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<true/>
+	</dict>
+	<key>UIApplicationSupportsIndirectInputEvents</key>
+	<true/>
+	<key>UILaunchScreen</key>
+	<dict/>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

Examples/Authenticator/Authenticator/LoginView.swift

@@ -0,0 +1,54 @@
+//
+//  LoginView.swift
+//  Authenticator
+//
+//  Created by Stefano Bertagno on 07/02/21.
+//
+
+import SwiftUI
+import UIKit
+import WebKit
+
+import Swiftagram
+
+class LoginViewController: UIViewController {
+    /// The completion handler.
+    var completion: ((Secret) -> Void)?
+    /// The web view.
+    var webView: WKWebView? {
+        didSet {
+            guard let webView = webView else { return }
+            webView.frame = view.frame
+            view.addSubview(webView)
+        }
+    }
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        // Authenticate.
+        WebViewAuthenticator {
+            self.webView = $0
+        }.authenticate { [weak self] in
+            switch $0 {
+            case .failure(let error): print(error.localizedDescription)
+            case .success(let secret):
+                self?.completion?(secret)
+                self?.dismiss(animated: true, completion: nil)
+            }
+        }
+    }
+}
+
+/// A `struct` defining a `View` used for logging in.
+struct LoginView: UIViewControllerRepresentable {
+    /// The current secret.
+    @Binding var secret: Secret?
+
+    func makeUIViewController(context: Context) -> LoginViewController {
+        let controller = LoginViewController()
+        controller.completion = { self.secret = $0 }
+        return controller
+    }
+    func updateUIViewController(_ uiViewController: LoginViewController, context: Context) {
+    }
+}

Examples/Authenticator/Authenticator/Preview Content/Preview Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Examples/Authenticator/Authenticator/Secret.swift

@@ -0,0 +1,15 @@
+//
+//  Secret.swift
+//  Authenticator
+//
+//  Created by Stefano Bertagno on 07/02/21.
+//
+
+import Foundation
+
+import Swiftagram
+
+extension Secret {
+    /// Compute the token.
+    var token: String? { try? JSONEncoder().encode(self).base64EncodedString() }
+}

Examples/Authenticator/Authenticator/Text.swift

@@ -0,0 +1,31 @@
+//
+//  Text.swift
+//  Authenticator
+//
+//  Created by Stefano Bertagno on 07/02/21.
+//
+
+import Foundation
+
+import SwiftUI
+
+extension Text {
+    /// Combine a collection of texts.
+    ///
+    /// - parameters: A collection of `Text`s.
+    /// - returns: A valid `Text`.
+    static func combine(_ texts: Text...) -> Text {
+        combine(texts)
+    }
+
+    /// Combine a collection of texts.
+    ///
+    /// - parameters: A collection of `Text`s.
+    /// - returns: A valid `Text`.
+    static func combine(_ texts: [Text]) -> Text {
+        guard let first = texts.first else {
+            fatalError("`texts` should not be empty")
+        }
+        return texts.dropFirst().reduce(first) { $0+$1 }
+    }
+}