[Demo App] Adding Confidence provider base demo app

ConfidenceDemoApp/ConfidenceDemoApp.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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+<?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>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

ConfidenceDemoApp/ConfidenceDemoApp.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

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+{
+  "object": {
+    "pins": [
+      {
+        "package": "OpenFeature",
+        "repositoryURL": "git@github.com:spotify/openfeature-swift-sdk.git",
+        "state": {
+          "branch": null,
+          "revision": "d89152f36ff6f021a1b8de46caa51b22496e5abc",
+          "version": "0.2.4"
+        }
+      }
+    ]
+  },
+  "version": 1
+}

ConfidenceDemoApp/ConfidenceDemoApp/Assets.xcassets/AccentColor.colorset/Contents.json

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

ConfidenceDemoApp/ConfidenceDemoApp/Assets.xcassets/AppIcon.appiconset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ConfidenceDemoApp/ConfidenceDemoApp/Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ConfidenceDemoApp/ConfidenceDemoApp/ConfidenceDemoApp.swift

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+import ConfidenceProvider
+import OpenFeature
+import SwiftUI
+
+@main
+struct ConfidenceDemoApp: App {
+    var body: some Scene {
+        WindowGroup {
+            ContentView()
+                .onReceive(NotificationCenter.default.publisher(for: UIApplication.didBecomeActiveNotification)) { _ in
+                    Task {
+                        await self.setup()
+                    }
+                }
+        }
+    }
+}
+
+extension ConfidenceDemoApp {
+    func setup() async {
+        guard let secret = ProcessInfo.processInfo.environment["CLIENT_SECRET"] else {
+            return
+        }
+        let provider = ConfidenceFeatureProvider
+            .Builder(credentials: .clientSecret(secret: secret))
+            .build()
+        let ctx = MutableContext(targetingKey: UUID.init().uuidString, structure: MutableStructure())
+        await OpenFeatureAPI.shared.setProvider(provider: provider, initialContext: ctx)
+    }
+}

ConfidenceDemoApp/ConfidenceDemoApp/ContentView.swift

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+import SwiftUI
+import OpenFeature
+
+struct ContentView: View {
+    @StateObject var text = DisplayText()
+    @StateObject var color = FlagColor()
+
+    var body: some View {
+        VStack {
+            Image(systemName: "flag")
+                .imageScale(.large)
+                .foregroundColor(color.color)
+                .padding(10)
+            Text(text.text)
+            Button("Get remote flag value") {
+                text.text = OpenFeatureAPI
+                    .shared
+                    .getClient()
+                    .getStringValue(key: "hawkflag.color", defaultValue: "ERROR")
+                if text.text == "Green" {
+                    color.color = .green
+                } else if text.text == "Yellow" {
+                    color.color = .yellow
+                } else {
+                    color.color = .red
+                }
+            }
+        }
+        .padding()
+    }
+}
+
+class DisplayText: ObservableObject {
+    @Published var text = "Hello World!"
+}
+
+
+class FlagColor: ObservableObject {
+    @Published var color: Color = .black
+}

ConfidenceDemoApp/ConfidenceDemoApp/Info.plist

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+<?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/>
+</plist>

ConfidenceDemoApp/ConfidenceDemoApp/Preview Content/Preview Assets.xcassets/Contents.json

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+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

ConfidenceDemoApp/ConfidenceDemoAppTests/ConfidenceDemoTests.swift

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+import XCTest
+@testable import ConfidenceDemoApp
+
+final class ConfidenceDemoTests: XCTestCase {
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // This is an example of a functional test case.
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+        // Any test you write for XCTest can be annotated as throws and async.
+        // Mark your test throws to produce an unexpected failure when your test encounters an uncaught error.
+        // Mark your test async to allow awaiting for asynchronous code to complete. Check the results with assertions afterwards.
+    }
+
+    func testPerformanceExample() throws {
+        // This is an example of a performance test case.
+        self.measure {
+            // Put the code you want to measure the time of here.
+        }
+    }
+}

ConfidenceDemoApp/ConfidenceDemoAppUITests/ConfidenceDemoUITests.swift

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+import XCTest
+
+final class ConfidenceDemoUITests: XCTestCase {
+    override func setUpWithError() throws {
+        // Put setup code here. This method is called before the invocation of each test method in the class.
+
+        // In UI tests it is usually best to stop immediately when a failure occurs.
+        continueAfterFailure = false
+
+        // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this.
+    }
+
+    override func tearDownWithError() throws {
+        // Put teardown code here. This method is called after the invocation of each test method in the class.
+    }
+
+    func testExample() throws {
+        // UI tests must launch the application that they test.
+        let app = XCUIApplication()
+        app.launch()
+
+        // Use XCTAssert and related functions to verify your tests produce the correct results.
+    }
+
+    func testLaunchPerformance() throws {
+        if #available(macOS 10.15, iOS 13.0, tvOS 13.0, watchOS 7.0, *) {
+            // This measures how long it takes to launch your application.
+            measure(metrics: [XCTApplicationLaunchMetric()]) {
+                XCUIApplication().launch()
+            }
+        }
+    }
+}

ConfidenceDemoApp/ConfidenceDemoAppUITests/ConfidenceDemoUITestsLaunchTests.swift

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+import XCTest
+
+final class ConfidenceDemoUITestsLaunchTests: XCTestCase {
+    override class var runsForEachTargetApplicationUIConfiguration: Bool {
+        true
+    }
+
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    func testLaunch() throws {
+        let app = XCUIApplication()
+        app.launch()
+
+        // Insert steps here to perform after app launch but before taking a screenshot,
+        // such as logging into a test account or navigating somewhere in the app
+
+        let attachment = XCTAttachment(screenshot: app.screenshot())
+        attachment.name = "Launch Screen"
+        attachment.lifetime = .keepAlways
+        add(attachment)
+    }
+}