Blog sample updated

ChartGeneratorAISample/ChartGenerator.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.12.35506.116 d17.12
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChartGenerator", "ChartGenerator\ChartGenerator.csproj", "{EC5A9A69-964B-4546-B344-41C7A240CD6D}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{EC5A9A69-964B-4546-B344-41C7A240CD6D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{EC5A9A69-964B-4546-B344-41C7A240CD6D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{EC5A9A69-964B-4546-B344-41C7A240CD6D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{EC5A9A69-964B-4546-B344-41C7A240CD6D}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

ChartGeneratorAISample/ChartGenerator/AIService/ChartsAIService.cs

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+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.ChatCompletion;
+
+namespace ChartGenerator
+{
+    internal class ChartAIService
+    {
+        #region Fields
+
+        /// <summary>
+        /// The EndPoint
+        /// </summary>
+        internal const string endpoint = "https://mobilemaui.openai.azure.com/";
+
+        /// <summary>
+        /// The Deployment name
+        /// </summary>
+        internal const string deploymentName = "deployment name";
+
+        /// <summary>
+        /// The Image Deployment name
+        /// </summary>
+        internal const string imageDeploymentName = "IMAGE_MODEL_NAME";
+
+        /// <summary>
+        /// The API key
+        /// </summary>
+        internal const string key = "API key";
+
+        /// <summary>
+        /// The chat completion service
+        /// </summary>
+        private IChatCompletionService? chatCompletions;
+
+        /// <summary>
+        /// The kernal
+        /// </summary>
+        private Kernel? kernel;
+
+        /// <summary>
+        /// The chat histroy
+        /// </summary>
+        private ChatHistory? chatHistory;
+
+        /// <summary>
+        /// The credential valid field
+        /// </summary>
+        private static bool isCredentialValid;
+
+        /// <summary>
+        /// The already credential validated field
+        /// </summary>
+        private static bool isAlreadyValidated;
+
+        /// <summary>
+        /// The uri result field
+        /// </summary>
+        private Uri? uriResult;
+
+        #endregion
+
+        public ChartAIService()
+        {
+            ValidateCredential();
+        }
+
+        #region Properties
+
+        /// <summary>
+        /// Gets or Set a value indicating whether an credentials are valid or not.
+        /// Returns <c>true</c> if the credentials are valid; otherwise, <c>false</c>.
+        /// </summary>
+        public static bool IsCredentialValid
+        {
+            get
+            {
+                return isCredentialValid;
+            }
+            set
+            {
+                isCredentialValid = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the chat history object
+        /// </summary>
+        public ChatHistory? ChatHistory
+        {
+            get
+            {
+                return chatHistory;
+            }
+            set
+            {
+                chatHistory = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the chat completions object
+        /// </summary>
+        public IChatCompletionService? ChatCompletions
+        {
+            get
+            {
+                return chatCompletions;
+            }
+            set
+            {
+                chatCompletions = value;
+            }
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating the kernal object
+        /// </summary>
+        public Kernel? Kernel
+        {
+            get
+            {
+                return kernel;
+            }
+            set
+            {
+                kernel = value;
+            }
+        }
+
+        #endregion
+
+        #region Private Methods
+
+        /// <summary>
+        /// Validate Azure Credentials
+        /// </summary>
+        private async void ValidateCredential()
+        {
+            #region Azure OpenAI
+            // Use below method for Azure Open AI
+            this.GetAzureOpenAIKernal();
+            #endregion
+
+            if (isAlreadyValidated)
+            {
+                return;
+            }
+            bool isValidUri = Uri.TryCreate(endpoint, UriKind.Absolute, out uriResult)
+                 && (uriResult.Scheme == Uri.UriSchemeHttp || uriResult.Scheme == Uri.UriSchemeHttps);
+
+            if (!isValidUri || !endpoint.Contains("http") || string.IsNullOrEmpty(key) || key.Contains("API key") || string.IsNullOrEmpty(deploymentName) || deploymentName.Contains("deployment name") || string.IsNullOrEmpty(imageDeploymentName))
+            {
+                ShowAlertAsync();
+                return;
+            }
+            try
+            {
+                if (ChatHistory != null && chatCompletions != null)
+                {
+                    // test the semantic kernal with message.
+                    ChatHistory.AddSystemMessage("Hello, Test Check");
+                    await chatCompletions.GetChatMessageContentAsync(chatHistory: ChatHistory, kernel: kernel);
+                }
+            }
+            catch (Exception)
+            {
+                // Handle any exceptions that indicate the credentials or endpoint are invalid.               
+                ShowAlertAsync();
+                return;
+            }
+            IsCredentialValid = true;
+            isAlreadyValidated = true;
+        }
+
+        #region Azure OpenAI
+        /// <summary>
+        /// To get the Azure open ai kernal method
+        /// </summary>
+        private void GetAzureOpenAIKernal()
+        {
+            // Create the chat history
+            chatHistory = new ChatHistory();
+            var builder = Kernel.CreateBuilder().AddAzureOpenAIChatCompletion(deploymentName, endpoint, key);
+
+            // Get the kernal from build
+            kernel = builder.Build();
+
+            //Get the chat completions from kernal
+            chatCompletions = kernel.GetRequiredService<IChatCompletionService>();
+        }
+        #endregion
+
+        /// <summary>
+        /// Retrieves an answer from the deployment name model using the provided user prompt.
+        /// </summary>
+        /// <param name="userPrompt">The user prompt.</param>
+        /// <returns>The AI response.</returns>
+        internal async Task<string> GetAnswerFromGPT(string userPrompt)
+        {
+            if (IsCredentialValid && ChatCompletions != null && ChatHistory != null)
+            {
+                ChatHistory.Clear();
+
+                // Add the user's prompt as a user message to the conversation.
+                ChatHistory.AddUserMessage(userPrompt);
+                try
+                {
+                    //// Send the chat completion request to the OpenAI API and await the response.
+                    var response = await ChatCompletions.GetChatMessageContentAsync(chatHistory: ChatHistory, kernel: Kernel);
+                    return response.ToString();
+                }
+                catch
+                {
+                    // If an exception occurs (e.g., network issues, API errors), return an empty string.
+                    return "";
+                }
+            }
+
+            return "";
+        }
+
+        /// <summary>
+        /// Show Alert Popup
+        /// </summary>
+        private async void ShowAlertAsync()
+        {
+#pragma warning disable CS0618 // Type or member is obsolete
+            if (Application.Current?.MainPage != null && !IsCredentialValid)
+            {
+                isAlreadyValidated = true;
+                await Application.Current.MainPage.DisplayAlert("Alert", "The Azure API key or endpoint is missing or incorrect. Please verify your credentials. You can also continue with the offline data.", "OK");
+            }
+#pragma warning restore CS0618 // Type or member is obsolete
+        }
+
+        #endregion
+    }
+}

ChartGeneratorAISample/ChartGenerator/App.xaml

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+<?xml version = "1.0" encoding = "UTF-8" ?>
+<Application xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:local="clr-namespace:ChartGenerator"
+             x:Class="ChartGenerator.App">
+    <Application.Resources>
+        <ResourceDictionary>
+            <ResourceDictionary.MergedDictionaries>
+                <ResourceDictionary Source="Resources/Styles/Colors.xaml" />
+                <ResourceDictionary Source="Resources/Styles/Styles.xaml" />
+            </ResourceDictionary.MergedDictionaries>
+        </ResourceDictionary>
+    </Application.Resources>
+</Application>

ChartGeneratorAISample/ChartGenerator/App.xaml.cs

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+namespace ChartGenerator
+{
+    public partial class App : Application
+    {
+        public App()
+        {
+            InitializeComponent();
+        }
+
+        protected override Window CreateWindow(IActivationState? activationState)
+        {
+            return new Window(new NavigationPage(new DesktopUI()));
+        }
+    }
+}

ChartGeneratorAISample/ChartGenerator/AppShell.xaml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<Shell
+    x:Class="ChartGenerator.AppShell"
+    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    xmlns:local="clr-namespace:ChartGenerator"
+    Shell.FlyoutBehavior="Disabled"
+    Title="ChartGenerator">
+
+    <ShellContent
+        ContentTemplate="{DataTemplate local:MainPage}"
+        Route="MainPage" />
+
+</Shell>

ChartGeneratorAISample/ChartGenerator/AppShell.xaml.cs

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+namespace ChartGenerator
+{
+    public partial class AppShell : Shell
+    {
+        public AppShell()
+        {
+            InitializeComponent();
+        }
+    }
+}