Contrôler les dépenses de Noël avec Semantic Kernel

public class AiApiClient
{
    private readonly HttpClient _httpClient;
    private readonly ILogger<AiApiClient> _logger;

    public AiApiClient(HttpClient httpClient, ILogger<AiApiClient> logger)
    {
        _httpClient = httpClient;
        _logger = logger;
    }

    public async Task<ReceiptAnalyzeResult?> AnalyzeAsync(byte[] imageBytes, CancellationToken cancellationToken = default)
    {
        if (imageBytes == null || imageBytes.Length == 0)
        {
            _logger.LogWarning("ImageBytes is null or empty.");
            return null;
        }

        _logger.LogInformation("Sending analyze request with image bytes of length: {Length}", imageBytes.Length);

        var request = new AnalyzeReceiptRequest
        {
            ImageBytes = imageBytes
        };

        try
        {
            var response = await _httpClient.PostAsJsonAsync("/analyze-receipt", request, cancellationToken);

            if (!response.IsSuccessStatusCode)
            {
                _logger.LogWarning("Failed to analyze receipt. StatusCode: {StatusCode}", response.StatusCode);
                return null;
            }

            var analyzeResult = await response.Content.ReadFromJsonAsync<ReceiptAnalyzeResult>(cancellationToken: cancellationToken);

            if (analyzeResult == null)
            {
                _logger.LogWarning("No content received from AI API service.");
                return null;
            }

            _logger.LogInformation("Analysis result received: {AnalyzeResult}", analyzeResult);

            return analyzeResult;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "An error occurred while analyzing the receipt.");
            return null;
        }
    }
}

using ReceiptScanner.Shared.Clients;
using ReceiptScanner.Shared.Models;

var builder = WebApplication.CreateBuilder(args);

// Add service defaults & Aspire client integrations.
builder.AddServiceDefaults();

// Add services to the container.
builder.Services.AddProblemDetails();

// Register AiApiClient with HttpClient
builder.Services.AddHttpClient<AiApiClient>(client =>
{
    client.BaseAddress = new Uri("https+http://aiservice");
});

// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
builder.Services.AddOpenApi();

var app = builder.Build();

// Configure the HTTP request pipeline.
app.UseExceptionHandler();

if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

// POST endpoint to analyze receipt
app.MapPost("/api/analyze-receipt", async (AnalyzeReceiptRequest request, AiApiClient aiApiClient, ILogger<Program> logger) =>
{
    if (request.ImageBytes == null || request.ImageBytes.Length == 0)
    {
        logger.LogWarning("ImageBytes is null or empty.");
        return Results.BadRequest("ImageBytes is required.");
    }

    logger.LogInformation("Received analyze receipt request with image bytes of length: {Length}", request.ImageBytes.Length);

    try
    {
        var result = await aiApiClient.AnalyzeAsync(request.ImageBytes);

        if (result == null)
        {
            logger.LogWarning("Failed to analyze the receipt.");
            return Results.Problem("Unable to process the receipt at this time. Please try again later.");
        }

        logger.LogInformation("Analysis completed successfully. Result: {Result}", result);

        return Results.Ok(result);
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "An error occurred while processing the receipt.");
        return Results.Problem("An error occurred while processing the receipt. Please try again later.");
    }
});

app.MapDefaultEndpoints();

app.Run();

@page "/analyzer"
@using ReceiptScanner.Shared.Clients
@using ReceiptScanner.Shared.Models
@using System.Globalization
@inject ApiServiceClient ApiClient
@inject ILogger<Program> Logger

@attribute [StreamRendering]
@rendermode InteractiveServer

<PageTitle>Receipt Analyzer</PageTitle>

<h1 class="text-center my-4">Receipt Analyzer</h1>

<div class="container">
    <p class="lead text-center mb-4">Upload receipt images below to extract their data.</p>

    <!-- File Upload Section -->
    <div class="card mb-4">
        <div class="card-body">
            <InputFile OnChange="HandleFileSelected" multiple class="form-control mb-3" />
            <button class="btn btn-primary w-100" @onclick="ProcessReceipts" disabled="@(!hasFiles)" type="button">
                <span class="@(!processing ? "d-none" : "") spinner-border spinner-border-sm" role="status" aria-hidden="true"></span>
                @if (processing)
                {
                    <span>Processing...</span>
                }
                else
                {
                    <span>Process Receipts</span>
                }
            </button>
        </div>
    </div>

    <!-- Uploaded Images Preview -->
    @if (fileBytesList.Any())
    {
        <div class="card mb-4">
            <div class="card-header">
                <h5 class="mb-0">Uploaded Receipt Images</h5>
            </div>
            <div class="card-body">
                <div class="row">
                    @foreach (var fileBytes in fileBytesList)
                    {
                        <div class="col-12 col-md-4 mb-3">
                            <img src="@($"data:image/jpeg;base64,{Convert.ToBase64String(fileBytes)}")" class="img-fluid rounded" alt="Uploaded receipt" />
                        </div>
                    }
                </div>
            </div>
        </div>
    }

    <!-- Processing Indicator -->
    @if (processing)
    {
        <div class="alert alert-info text-center" role="alert">
            <strong>Processing receipts...</strong> Please wait while we analyze the uploaded files.
        </div>
    }

    <!-- Analysis Results Section -->
    @if (analyzedReceipts != null && analyzedReceipts.Any())
    {
        <div class="card">
            <div class="card-header">
                <h5 class="mb-0">Analysis Results</h5>
            </div>
            <div class="card-body">
                <table class="table table-striped table-bordered">
                    <thead>
                        <tr>
                            <th>Store</th>
                            <th>Date</th>
                            <th>Total</th>
                            <th>Items</th>
                        </tr>
                    </thead>
                    <tbody>
                        @foreach (var receipt in analyzedReceipts)
                        {
                            <tr>
                                <td>@(receipt.Result?.Store ?? "Unknown")</td>
                                <td>@(receipt.Result?.Date?.ToString() ?? "Unknown")</td>
                                <td>@(receipt.Result?.Total?.ToString("C", ci) ?? "Unknown")</td>
                                <td>
                                    <ul class="list-unstyled">
                                        @if (receipt.Result?.Items is not null)
                                        {
                                            @foreach (var item in receipt.Result?.Items!)
                                            {
                                                <li><strong>@item.Name</strong> - @item.Price?.ToString("C", ci)</li>
                                            }
                                        }
                                    </ul>
                                </td>
                            </tr>
                        }
                    </tbody>
                </table>
            </div>
        </div>
    }
    else if (processed && (analyzedReceipts == null || !analyzedReceipts.Any()))
    {
        <div class="alert alert-warning text-center" role="alert">
            <strong>No results found.</strong> Please try again with different images or ensure they are clear and legible.
        </div>
    }
</div>

@code {
    private bool hasFiles;
    private bool processing;
    private bool processed;
    private List<byte[]> fileBytesList = new();
    private List<ReceiptAnalyzeResult> analyzedReceipts = new();
    CultureInfo ci = new CultureInfo("es-es");

    private async Task HandleFileSelected(InputFileChangeEventArgs e)
    {
        try
        {
            fileBytesList.Clear();

            foreach (var file in e.GetMultipleFiles())
            {
                var memoryStream = new MemoryStream();
                await file.OpenReadStream().CopyToAsync(memoryStream);
                fileBytesList.Add(memoryStream.ToArray());
            }

            hasFiles = fileBytesList.Any();
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Error while handling file upload.");
        }
    }

    private async Task ProcessReceipts()
    {
        if (!hasFiles)
            return;

        processing = true;
        analyzedReceipts.Clear();

        try
        {
            foreach (var fileBytes in fileBytesList)
            {
                var result = await ApiClient.AnalyzeReceiptAsync(fileBytes);
                if (result != null)
                {
                    analyzedReceipts.Add(result);
                }
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Error while processing receipts.");
        }
        finally
        {
            processing = false;
            processed = true;
        }
    }
}

```Cette page permet aux utilisateurs de télécharger des reçus et affiche les résultats de l'analyse dans un tableau avec les noms des magasins, les dates, les montants totaux et la liste des articles.

<p align="center">
<img src="https://imgur.com/BLswKhm.png">
</p>

## Étape 3 : .NET Aspire

<p align="center">
<img src="https://imgur.com/ja56RWN.png">
</p>

### Qu'est-ce que .NET Aspire ?

.NET Aspire est un ensemble d'outils, de modèles et de packages puissants permettant de créer des applications observables et prêtes pour la production. .NET Aspire est fourni via une collection de packages NuGet qui répondent à des problèmes spécifiques liés au cloud. Les applications cloud natives sont souvent constituées de petits éléments ou de microservices interconnectés plutôt que d'une base de code unique et monolithique. Les applications cloud natives consomment généralement un grand nombre de services, tels que les bases de données, la messagerie et la mise en cache. Pour plus d’informations sur la prise en charge, consultez la politique de prise en charge de .NET Aspire.

Une application distribuée est une application qui utilise des ressources de calcul sur plusieurs nœuds, tels que des conteneurs exécutés sur différents hôtes. Ces nœuds doivent communiquer au-delà des limites du réseau pour fournir des réponses aux utilisateurs. Une application cloud native est un type spécifique d'application distribuée qui tire pleinement parti de l'évolutivité, de la résilience et de la gérabilité des infrastructures cloud.

L'utilisation de **.NET Aspire** pour ce projet offre plusieurs avantages qui améliorent la qualité globale du système, tels que :

### 1. **Journalisation centralisée**

.NET Aspire intègre automatiquement la journalisation dans l'ensemble de l'application, ce qui signifie que vous n'avez pas besoin de configurer manuellement la journalisation pour chaque service. Cela garantit que les journaux sont cohérents et stockés dans un emplacement centralisé, ce qui facilite grandement le débogage et la surveillance.

Par exemple, la classe `AiApiClient` utilise la journalisation pour enregistrer les octets d'image envoyés au service AI, les réponses de l'API et toutes les erreurs qui se produisent pendant le processus d'analyse.

```csharp
_logger.LogInformation("Sending analyze request with image bytes of length: {Length}",

 imageBytes.Length);