Post Files

src/PostIt/PostIt.Tests/ActivitiesPageViewModelTests.cs

@@ -162,6 +162,12 @@ public class ActivitiesPageViewModelTests
             return Task.CompletedTask;
         }
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt.Tests/BillingCommandPageViewModelTests.cs

@@ -352,6 +352,12 @@ public class BillingCommandPageViewModelTests
             return Task.CompletedTask;
         }
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt.Tests/BillingQueriesPageViewModelTests.cs

@@ -129,6 +129,12 @@ public class BillingQueriesPageViewModelTests
             return Task.CompletedTask;
         }
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt.Tests/MainPageButtonsTests.cs

@@ -8,6 +8,7 @@ using Yavsc.Blogspot;
 using PostIt.Services;
 using PostIt.ViewModels;
 using PostIt.Views;
+using PostIt.Views.Blogs;
 
 namespace PostIt.Tests;
 
@@ -72,13 +73,13 @@ public class MainPageButtonsTests
         { }
     }
 
-    private static MainViewModel MakeViewModel(BlogPostDto? selectedPost = null)
+    private static BlogsViewModel MakeViewModel(BlogPostDto? selectedPost = null)
     {
         var api = new ThrowingApi();
         var blog = new BlogApiClient(api, "http://localhost/");
         var circle = new CircleApiClient(api, "http://localhost/");
         var acl = new BlogAclApiClient(api, "http://localhost/");
-        // Minimal DI graph: only what MainPageViewModel resolves
+        // Minimal DI graph: only what BlogsViewModel resolves
         // when the user clicks a navigation button. Today that's
         // SignaturePageViewModel / CirclesPageViewModel / ACL
         // dependencies. The graph intentionally stays local to this
@@ -93,7 +94,7 @@ public class MainPageButtonsTests
         services.AddTransient<SignaturePage>();
         services.AddTransient<CirclesPage>();
         services.AddTransient<PostAclDialog>();
-        var vm = new MainViewModel(blog, services: services.BuildServiceProvider());
+        var vm = new BlogsViewModel(blog, services: services.BuildServiceProvider());
         if (selectedPost is not null) vm.SelectedPost = selectedPost;
         return vm;
     }
@@ -101,7 +102,7 @@ public class MainPageButtonsTests
     /// <summary>
     /// Mount a real <see cref="MainView"/> (as
     /// <c>SessionStatusBannerTests</c> does), push a
-    /// <see cref="MainPage"/> with the given VM onto
+    /// <see cref="BlogsPage"/> with the given VM onto
     /// <c>NavRoot</c>. <c>PushAsync</c> is awaited (via
     /// <c>GetAwaiter().GetResult()</c>) so the page is on the
     /// nav stack before the test tries to interact with its
@@ -109,10 +110,10 @@ public class MainPageButtonsTests
     /// realised and <c>KeyPressQwerty</c> has a real
     /// <see cref="TopLevel"/> to dispatch against.
     /// </summary>
-    private static (MainView window, MainPage page) MountMainPage(MainViewModel vm)
+    private static (MainView window, BlogsPage page) MountMainPage(BlogsViewModel vm)
     {
         var window = new MainView();
-        var page = new MainPage { DataContext = vm };
+        var page = new BlogsPage { DataContext = vm };
         var app = (PostIt.App)Application.Current!;
         app.AttachMainWindow(window);
         window.NavRoot.PushAsync(page).GetAwaiter().GetResult();
@@ -203,7 +204,7 @@ public class MainPageButtonsTests
     public void Signature_dev_button_click_pushes_a_page_onto_nav_stack()
     {
         // Arrange: the "[DEV] Signature" button is bound to the
-        // MainPageViewModel.OpenSignatureDevCommand [RelayCommand].
+        // BlogsViewModel.OpenSignatureDevCommand [RelayCommand].
         // The click must push SignaturePage on top of NavRoot.
         // The ServiceCollection registered in MakeViewModel provides
         // SignaturePageViewModel so the command can resolve it via

src/PostIt/PostIt.Tests/MainPageSaveTests.cs

@@ -5,10 +5,11 @@ using Yavsc.Blogspot;
 using Yavsc.Api.Client;
 using PostIt.ViewModels;
 using PostIt.Views;
+using PostIt.Views.Blogs;
 namespace PostIt.Tests;
 
 /// <summary>
-/// Headless UI tests for the "Save" flow in <see cref="MainPage"/>.
+/// Headless UI tests for the "Save" flow in <see cref="BlogsPage"/>.
 /// The pattern is the one <c>SessionStatusBannerTests</c>
 /// established: <c>[AvaloniaFact]</c>, a <see cref="Window"/>
 /// hosting the page (via a <see cref="Frame"/> because
@@ -40,9 +41,9 @@ public class MainPageSaveTests
         var recorder = new CallRecorder();
         var api = new RecordingYavscApiClient(recorder);
         var blog = new BlogApiClient(api, "http://localhost/");
-        var viewModel = new MainViewModel(blog);
+        var viewModel = new BlogsViewModel(blog);
 
-        var page = new MainPage { DataContext = viewModel };
+        var page = new BlogsPage { DataContext = viewModel };
         // MainPage is a ContentPage (a Page, not a Control), so it
         // must be hosted in a navigation surface. The production
         // MainWindow.axaml uses NavigationPage, and the API is the

src/PostIt/PostIt.Tests/PostAclDialogTests.cs

@@ -270,6 +270,12 @@ public class PostAclDialogTests
             return Task.CompletedTask;
         }
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt.Tests/PostItViewModelTests.cs

@@ -11,12 +11,12 @@ public class PostItViewModelTests
     [Fact]
     public void SearchCommand_filters_posts_by_title_article_or_author()
     {
-        // MainPageViewModel no longer owns a BlogApiClient instance by
+        // BlogsViewModel no longer owns a BlogApiClient instance by
         // default; tests construct one with a fake YavscApiClient that
         // throws on any call (we never call the API in this test).
         var fakeApi = new ThrowingYavscApiClient();
         var blog = new BlogApiClient(fakeApi, "http://localhost/");
-        var viewModel = new MainViewModel(blog);
+        var viewModel = new BlogsViewModel(blog);
 
         viewModel.Posts.Add(new BlogPostDto { Id = 1, Title = "First post", Article = "Hello world", AuthorId = "alice" });
         viewModel.Posts.Add(new BlogPostDto { Id = 2, Title = "Second post", Article = "Nothing here", AuthorId = "bob" });
@@ -60,7 +60,7 @@ public class PostItViewModelTests
     {
         var api = new RecordingPublishApi();
         var blog = new BlogApiClient(api, "http://localhost/");
-        var viewModel = new MainViewModel(blog);
+        var viewModel = new BlogsViewModel(blog);
 
         viewModel.SelectedPost = new BlogPostDto { Id = 42, IsPublished = false };
 
@@ -146,6 +146,12 @@ public class PostItViewModelTests
             return Task.CompletedTask;
         }
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt.Tests/RdvPageHeadlessTests.cs

@@ -74,6 +74,12 @@ public class RdvPageHeadlessTests
         public Task CallAsync(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
             => Task.CompletedTask;
 
+        public Task<T> CallAsync<T>(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync<T>(method, path, (object?)null, ct);
+
+        public Task CallAsync(HttpMethod method, string path, Func<HttpContent> contentFactory, CancellationToken ct = default)
+            => CallAsync(method, path, (object?)null, ct);
+
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 }

src/PostIt/PostIt/Services/YavscApiClient.cs

@@ -191,7 +191,28 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
         object? body = null,
         CancellationToken ct = default)
     {
-        using var response = await SendAsync(method, path, body, ct).ConfigureAwait(false);
+        using var response = await SendAsync(method, path, body is null ? null : () => JsonContent.Create(body), ct).ConfigureAwait(false);
+        await EnsureSuccessOrThrowAsync(response, ct).ConfigureAwait(false);
+
+        var stream = await response.Content.ReadAsStreamAsync(ct).ConfigureAwait(false);
+        var dto = await JsonSerializer.DeserializeAsync<T>(stream,
+            new JsonSerializerOptions { PropertyNameCaseInsensitive = true }, ct).ConfigureAwait(false);
+        return dto!;
+    }
+
+    /// <summary>
+    /// Call a multipart endpoint, transparently refreshing the token if needed.
+    /// </summary>
+    public virtual async Task<T> CallAsync<T>(
+        HttpMethod method,
+        string path,
+        Func<HttpContent> contentFactory,
+        CancellationToken ct = default)
+    {
+        if (contentFactory is null)
+            throw new ArgumentNullException(nameof(contentFactory));
+
+        using var response = await SendAsync(method, path, contentFactory, ct).ConfigureAwait(false);
         await EnsureSuccessOrThrowAsync(response, ct).ConfigureAwait(false);
 
         var stream = await response.Content.ReadAsStreamAsync(ct).ConfigureAwait(false);
@@ -217,7 +238,23 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
         object? body = null,
         CancellationToken ct = default)
     {
-        using var response = await SendAsync(method, path, body, ct).ConfigureAwait(false);
+        using var response = await SendAsync(method, path, body is null ? null : () => JsonContent.Create(body), ct).ConfigureAwait(false);
+        await EnsureSuccessOrThrowAsync(response, ct).ConfigureAwait(false);
+    }
+
+    /// <summary>
+    /// Call a multipart endpoint that returns no useful body (DELETE, etc.).
+    /// </summary>
+    public async Task CallAsync(
+        HttpMethod method,
+        string path,
+        Func<HttpContent> contentFactory,
+        CancellationToken ct = default)
+    {
+        if (contentFactory is null)
+            throw new ArgumentNullException(nameof(contentFactory));
+
+        using var response = await SendAsync(method, path, contentFactory, ct).ConfigureAwait(false);
         await EnsureSuccessOrThrowAsync(response, ct).ConfigureAwait(false);
     }
 
@@ -232,7 +269,7 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
         => CallAsync(method, path, body: null, ct);
 
     private async Task<HttpResponseMessage> SendAsync(
-        HttpMethod method, string path, object? body, CancellationToken ct)
+        HttpMethod method, string path, Func<HttpContent>? contentFactory, CancellationToken ct)
     {
         if (_tokens is null)
             throw new InvalidOperationException("Not logged in. Call LoginInteractiveAsync first.");
@@ -240,8 +277,8 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
         await EnsureFreshTokenAsync(ct).ConfigureAwait(false);
 
         using var req = new HttpRequestMessage(method, path);
-        if (body is not null)
-            req.Content = JsonContent.Create(body);
+        if (contentFactory is not null)
+            req.Content = contentFactory();
         var response = await Http.SendAsync(req, ct).ConfigureAwait(false);
 
         if (response.StatusCode == HttpStatusCode.Unauthorized)
@@ -252,8 +289,8 @@ public class YavscApiClient : IYavscApiClient, IAsyncDisposable
             await ForceRefreshAsync(ct).ConfigureAwait(false);
 
             using var retry = new HttpRequestMessage(method, path);
-            if (body is not null)
-                retry.Content = JsonContent.Create(body);
+            if (contentFactory is not null)
+                retry.Content = contentFactory();
             response = await Http.SendAsync(retry, ct).ConfigureAwait(false);
         }
 

src/PostIt/PostIt/ViewModels/Activity/BillingQueriesPageViewModel.cs

@@ -43,7 +43,7 @@ public partial class BillingQueriesPageViewModel : ViewModelBase, IActionStatusV
         ? $"Demandes en cours ({Form.Title})"
         : $"Commandes {Form.Title}";
     public string ContextLabel => $"{Performer.UserName} · {Activity.Name}";
-    public bool CanOpenDetails => true;
+    public bool CanOpenDetails => !IsReadOnly;
 
     public override bool CanNavigateNext
     {
@@ -75,7 +75,7 @@ public partial class BillingQueriesPageViewModel : ViewModelBase, IActionStatusV
 
     public Task InitializeAsync() => RefreshAsync();
 
-    private bool CanOpenSelectedQuery() => SelectedQuery is not null;
+    private bool CanOpenSelectedQuery() => CanOpenDetails && SelectedQuery is not null;
 
     [RelayCommand]
     public async Task RefreshAsync()

src/PostIt/PostIt/ViewModels/Blogs/BlogsViewModel.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.ObjectModel;
+using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Avalonia;
@@ -8,6 +9,7 @@ using CommunityToolkit.Mvvm.Input;
 using Microsoft.Extensions.DependencyInjection;
 using Yavsc.Blogspot;
 using Yavsc.Api.Client;
+using Yavsc.Abstract.Files;
 using PostIt.Helpers;
 
 namespace PostIt.ViewModels;
@@ -66,6 +68,9 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
     [ObservableProperty]
     public partial ObservableCollection<BlogPostDto> FilteredPosts { get; set; }
 
+    [ObservableProperty]
+    public partial ObservableCollection<BlogUploadFile> DraftAttachments { get; set; }
+
     [ObservableProperty]
     public partial BlogPostDto? SelectedPost { get; set; }
 
@@ -113,6 +118,8 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
 
         await ExecuteAsync(async () =>
         {
+            var attachments = DraftAttachments.ToArray();
+
             // Build a fresh BlogPostDto from the editor buffer on
             // every Save — we no longer mutate SelectedPost in
             // place. The previous behaviour copied the buffer
@@ -133,11 +140,28 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
                     DateModified = DateTime.UtcNow,
                     IsPublished = DraftIsPublished
                 };
-                var created = await BlogClient!.CreatePostAsync(draft);
+                var created = await BlogClient!.CreatePostAsync(draft, attachments);
                 if (created is not null)
                 {
                     SelectedPost = created;
+
+                    if (TryAppendAttachmentLinks(created, attachments))
+                    {
+                        var linkUpdate = new BlogPostDto
+                        {
+                            Id = created.Id,
+                            AuthorId = created.AuthorId,
+                            Photo = created.Photo,
+                            Title = DraftTitle,
+                            Article = DraftArticle ?? string.Empty,
+                            DateCreated = created.DateCreated,
+                            DateModified = DateTime.UtcNow,
+                        };
+                        await BlogClient.UpdatePostAsync(created.Id, linkUpdate);
+                    }
+
                     this.SetInfoStatus($"Billet {created.Id} créé.");
+                    DraftAttachments.Clear();
                 }
             }
             else
@@ -152,8 +176,26 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
                     DateCreated = SelectedPost.DateCreated,
                     DateModified = DateTime.UtcNow,
                 };
-                await BlogClient!.UpdatePostAsync(SelectedPost.Id, update);
+
+                await BlogClient!.UpdatePostAsync(SelectedPost.Id, update, attachments);
+
+                if (TryAppendAttachmentLinks(SelectedPost, attachments))
+                {
+                    var linkUpdate = new BlogPostDto
+                    {
+                        Id = SelectedPost.Id,
+                        AuthorId = SelectedPost.AuthorId,
+                        Photo = SelectedPost.Photo,
+                        Title = DraftTitle,
+                        Article = DraftArticle ?? string.Empty,
+                        DateCreated = SelectedPost.DateCreated,
+                        DateModified = DateTime.UtcNow,
+                    };
+                    await BlogClient.UpdatePostAsync(SelectedPost.Id, linkUpdate);
+                }
+
                 this.SetInfoStatus($"Billet {SelectedPost.Id} enregistré.");
+                DraftAttachments.Clear();
             }
 
             await RefreshPostsAsync();
@@ -347,6 +389,7 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
     {
         Posts = new ObservableCollection<BlogPostDto>();
         FilteredPosts = new ObservableCollection<BlogPostDto>();
+        DraftAttachments = new ObservableCollection<BlogUploadFile>();
         SelectedPost = null;
         IsBusy = false;
         this.SetInfoStatus("Prêt.");
@@ -427,6 +470,7 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
         // Mirror publication state too. Defaults to false on
         // null selection so a fresh draft starts unpublished.
         DraftIsPublished = value?.IsPublished ?? false;
+        DraftAttachments.Clear();
         UpdateCommandStates();
     }
 
@@ -508,4 +552,55 @@ public partial class BlogsViewModel : ViewModelBase, IActionStatusViewModel
             IsLoaded = true;
         }
     }
+
+    private bool TryAppendAttachmentLinks(BlogPostDto post, IReadOnlyCollection<BlogUploadFile> attachments)
+    {
+        if (attachments.Count == 0)
+            return false;
+
+        var ownerSegment = post.Author?.UserName;
+        if (string.IsNullOrWhiteSpace(ownerSegment))
+            ownerSegment = post.AuthorId;
+
+        if (string.IsNullOrWhiteSpace(ownerSegment))
+            return false;
+
+        var article = DraftArticle ?? string.Empty;
+        var links = new List<string>();
+
+        foreach (var attachment in attachments)
+        {
+            var relativePath = $"{EscapePathSegment(ownerSegment)}/blogs/{post.Id}/{EscapePathSegment(attachment.FileName)}";
+            var fileUrl = ResolveUserFileUrl(relativePath);
+            var markdownLine = $"- [{attachment.FileName}]({fileUrl})";
+
+            if (!article.Contains(markdownLine, StringComparison.Ordinal))
+                links.Add(markdownLine);
+        }
+
+        if (links.Count == 0)
+            return false;
+
+        var prefix = article.Length == 0
+            ? ""
+            : (article.EndsWith("\n", StringComparison.Ordinal) ? "\n" : "\n\n");
+
+        DraftArticle = article + prefix + string.Join("\n", links);
+        return true;
+    }
+
+    private string ResolveUserFileUrl(string relativePath)
+    {
+        var authority = Settings?.Authentication?.Authority;
+        if (!string.IsNullOrWhiteSpace(authority)
+            && Uri.TryCreate(authority, UriKind.Absolute, out var baseUri))
+        {
+            return FileServerUrlHelpers.GetUserFilesUri(baseUri, relativePath).ToString();
+        }
+
+        return $"{Yavsc.Constants.UserFilesPath}/{relativePath}";
+    }
+
+    private static string EscapePathSegment(string segment)
+        => Uri.EscapeDataString(segment);
 }

src/PostIt/PostIt/Views/Blogs/MainPage.axaml

@@ -34,6 +34,9 @@
                 <Button Command="{Binding SearchAsync}" Content="🔍 Filter" />
                 <Button Command="{Binding SaveAsync}" Content="Save" />
                 <Button Command="{Binding DeleteAsync}" Content="Delete" />
+                <Button x:Name="AddAttachmentButton"
+                    Content="Ajouter fichiers"
+                    Click="AddAttachment_Click" />
                 <Button x:Name="ManageAclButton"
                         Command="{Binding ManageAclAsync}"
                         Content="ACL" />
@@ -102,10 +105,22 @@
                   Text="{Binding DraftArticle, Mode=TwoWay}"
                   MinHeight="320"
                   HorizontalAlignment="Stretch"
-                  VerticalAlignment="Stretch">
-                </TextBox>
+                  VerticalAlignment="Stretch" />
 
-                <postitControls:StatusBar Grid.Row="3"
+                <Border Grid.Row="3" BorderBrush="LightGray" BorderThickness="1" Padding="8">
+                    <StackPanel Spacing="4">
+                        <TextBlock Text="Pièces jointes" FontWeight="SemiBold" />
+                        <ItemsControl ItemsSource="{Binding DraftAttachments}">
+                            <ItemsControl.ItemTemplate>
+                                <DataTemplate>
+                                    <TextBlock Text="{Binding FileName}" />
+                                </DataTemplate>
+                            </ItemsControl.ItemTemplate>
+                        </ItemsControl>
+                    </StackPanel>
+                </Border>
+
+                <postitControls:StatusBar Grid.Row="4"
                                           DataContext="{Binding ActionStatus}" />
 
             </Grid>

src/PostIt/PostIt/Views/Blogs/MainPage.axaml.cs

@@ -1,5 +1,8 @@
 using System;
+using System.IO;
+using System.Linq;
 using Avalonia.Controls;
+using Avalonia.Platform.Storage;
 using Avalonia.Controls.Primitives;
 
 namespace PostIt.Views.Blogs;
@@ -22,4 +25,47 @@ public partial class BlogsPage : ContentPage
             }
         }
     }
+
+    private async void AddAttachment_Click(object? sender, Avalonia.Interactivity.RoutedEventArgs e)
+    {
+        var topLevel = TopLevel.GetTopLevel(this);
+        if (topLevel is null || DataContext is not ViewModels.BlogsViewModel vm)
+            return;
+
+        var files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions
+        {
+            Title = "Choisir des fichiers à joindre au billet",
+            AllowMultiple = true,
+        });
+
+        if (files.Count == 0)
+            return;
+
+        var uploads = new System.Collections.Generic.List<Yavsc.Api.Client.BlogUploadFile>(files.Count);
+        foreach (var file in files)
+        {
+            await using var stream = await file.OpenReadAsync();
+            using var memory = new MemoryStream();
+            await stream.CopyToAsync(memory);
+            uploads.Add(new Yavsc.Api.Client.BlogUploadFile(file.Name, memory.ToArray(), GetMimeType(file.Name)));
+        }
+
+        vm.DraftAttachments.Clear();
+        foreach (var upload in uploads)
+            vm.DraftAttachments.Add(upload);
+    }
+
+    private static string GetMimeType(string fileName)
+    {
+        var ext = Path.GetExtension(fileName)?.ToLowerInvariant();
+        return ext switch
+        {
+            ".png" => "image/png",
+            ".jpg" or ".jpeg" => "image/jpeg",
+            ".webp" => "image/webp",
+            ".gif" => "image/gif",
+            ".pdf" => "application/pdf",
+            _ => "application/octet-stream"
+        };
+    }
 }

src/Yavsc.Abstract/Files/FileServerUrlHelpers.cs

@@ -0,0 +1,67 @@
+namespace Yavsc.Abstract.Files;
+
+/// <summary>
+/// Helpers pour dériver les URL publiques des fichiers statiques à partir
+/// d'une URL d'autorité OIDC ou d'un autre point d'entrée racine.
+/// </summary>
+public static class FileServerUrlHelpers
+{
+    /// <summary>
+    /// Dérive la racine publique des fichiers utilisateur en alignant
+    /// le chemin sur <see cref="Yavsc.Constants.UserFilesPath"/>.
+    /// </summary>
+    /// <param name="authorityBaseUrl">
+    /// URL absolue de base, typiquement l'autorité OIDC de Yavsc.Org.
+    /// </param>
+    /// <returns>Une URL absolue pointant vers la racine des fichiers utilisateur.</returns>
+    public static Uri GetUserFilesBaseUri(Uri authorityBaseUrl)
+    {
+        ArgumentNullException.ThrowIfNull(authorityBaseUrl);
+
+        if (!authorityBaseUrl.IsAbsoluteUri)
+        {
+            throw new ArgumentException(
+                "The authority base URL must be absolute.",
+                nameof(authorityBaseUrl));
+        }
+
+        var baseString = authorityBaseUrl.GetLeftPart(UriPartial.Authority);
+        return new Uri(new Uri(baseString, UriKind.Absolute), EnsureTrailingSlash(Yavsc.Constants.UserFilesPath));
+    }
+
+    /// <summary>
+    /// Dérive la racine publique des fichiers utilisateur en alignant
+    /// le chemin sur <see cref="Yavsc.Constants.UserFilesPath"/>.
+    /// </summary>
+    /// <param name="authorityBaseUrl">
+    /// URL absolue de base, typiquement l'autorité OIDC de Yavsc.Org.
+    /// </param>
+    /// <returns>Une URL absolue pointant vers la racine des fichiers utilisateur.</returns>
+    public static Uri GetUserFilesBaseUri(string authorityBaseUrl)
+        => GetUserFilesBaseUri(new Uri(authorityBaseUrl, UriKind.Absolute));
+
+    /// <summary>
+    /// Construit l'URL d'un fichier utilisateur à partir de la base d'autorité
+    /// et d'un chemin relatif sous la racine des fichiers.
+    /// </summary>
+    public static Uri GetUserFilesUri(Uri authorityBaseUrl, string relativePath)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(relativePath);
+
+        var baseUri = GetUserFilesBaseUri(authorityBaseUrl);
+        return new Uri(baseUri, NormalizeRelativePath(relativePath));
+    }
+
+    /// <summary>
+    /// Construit l'URL d'un fichier utilisateur à partir de la base d'autorité
+    /// et d'un chemin relatif sous la racine des fichiers.
+    /// </summary>
+    public static Uri GetUserFilesUri(string authorityBaseUrl, string relativePath)
+        => GetUserFilesUri(new Uri(authorityBaseUrl, UriKind.Absolute), relativePath);
+
+    private static string EnsureTrailingSlash(string path)
+        => path.EndsWith("/", StringComparison.Ordinal) ? path : path + "/";
+
+    private static string NormalizeRelativePath(string relativePath)
+        => relativePath.TrimStart('/');
+}

src/Yavsc.Api.Client/BlogApiClient.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
 using Yavsc.Blogspot;
@@ -62,11 +64,18 @@ public sealed class BlogApiClient
     public Task<BlogPostDto?> GetPostAsync(long id, CancellationToken ct = default)
         => _api.CallAsync<BlogPostDto?>(HttpMethod.Get, $"{_pathPrefix}/{id}", ct: ct);
 
-    public Task<BlogPostDto?> CreatePostAsync(BlogPostDto post, CancellationToken ct = default)
-        => _api.CallAsync<BlogPostDto?>(HttpMethod.Post, _pathPrefix, body: post, ct: ct);
+    public Task<BlogPostDto?> CreatePostAsync(
+        BlogPostDto post,
+        IReadOnlyCollection<BlogUploadFile>? files = null,
+        CancellationToken ct = default)
+        => SendPostAsync(HttpMethod.Post, _pathPrefix, post, files, ct);
 
-    public Task UpdatePostAsync(long id, BlogPostDto post, CancellationToken ct = default)
-        => _api.CallAsync(HttpMethod.Put, $"{_pathPrefix}/{id}", body: post, ct: ct);
+    public Task UpdatePostAsync(
+        long id,
+        BlogPostDto post,
+        IReadOnlyCollection<BlogUploadFile>? files = null,
+        CancellationToken ct = default)
+        => SendPostAsync(HttpMethod.Put, $"{_pathPrefix}/{id}", post, files, ct);
 
     public Task DeletePostAsync(long id, CancellationToken ct = default)
         => _api.CallAsync(HttpMethod.Delete, $"{_pathPrefix}/{id}", ct: ct);
@@ -81,4 +90,39 @@ public sealed class BlogApiClient
     public Task SetPublishAsync(long id, bool publish, CancellationToken ct = default)
         => _api.CallAsync(HttpMethod.Put, $"{_pathPrefix}/{id}/publish",
             body: new { publish }, ct: ct);
+
+    private Task<BlogPostDto?> SendPostAsync(
+        HttpMethod method,
+        string path,
+        BlogPostDto post,
+        IReadOnlyCollection<BlogUploadFile>? files,
+        CancellationToken ct)
+    {
+        if (files is null || files.Count == 0)
+            return _api.CallAsync<BlogPostDto?>(method, path, body: post, ct: ct);
+
+        return _api.CallAsync<BlogPostDto?>(method, path, () => CreateMultipartContent(post, files), ct: ct);
+    }
+
+    private static HttpContent CreateMultipartContent(BlogPostDto post, IReadOnlyCollection<BlogUploadFile> files)
+    {
+        var content = new MultipartFormDataContent();
+        var blogJson = JsonSerializer.Serialize(post, new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+            DefaultIgnoreCondition = System.Text.Json.Serialization.JsonIgnoreCondition.WhenWritingNull,
+        });
+
+        content.Add(new StringContent(blogJson), "blog");
+
+        foreach (var file in files)
+        {
+            var fileContent = new ByteArrayContent(file.Content);
+            fileContent.Headers.ContentType = new MediaTypeHeaderValue(
+                string.IsNullOrWhiteSpace(file.ContentType) ? "application/octet-stream" : file.ContentType);
+            content.Add(fileContent, "file", file.FileName);
+        }
+
+        return content;
+    }
 }

src/Yavsc.Api.Client/BlogUploadFile.cs

@@ -0,0 +1,6 @@
+namespace Yavsc.Api.Client;
+
+/// <summary>
+/// Buffered file payload for multipart blog uploads.
+/// </summary>
+public sealed record BlogUploadFile(string FileName, byte[] Content, string? ContentType = null);

src/Yavsc.Api.Client/IYavscApiClient.cs

@@ -53,10 +53,24 @@ public interface IYavscApiClient : IAsyncDisposable
         object? body = null,
         CancellationToken ct = default);
 
+    /// <summary>Call a multipart endpoint with a typed return value.</summary>
+    Task<T> CallAsync<T>(
+        HttpMethod method,
+        string path,
+        Func<HttpContent> contentFactory,
+        CancellationToken ct = default);
+
     /// <summary>Call a JSON endpoint that returns no useful body (DELETE, 204, etc.).</summary>
     Task CallAsync(
         HttpMethod method,
         string path,
         object? body = null,
         CancellationToken ct = default);
+
+    /// <summary>Call a multipart endpoint that returns no useful body.</summary>
+    Task CallAsync(
+        HttpMethod method,
+        string path,
+        Func<HttpContent> contentFactory,
+        CancellationToken ct = default);
 }

src/Yavsc.Blogs.Tests/BlogApiTests.cs

@@ -1,7 +1,9 @@
 using System.Net;
+using System.Net.Http.Headers;
 using System.Net.Http.Json;
 using System.Security.Claims;
 using System.Text.Json;
+using Microsoft.Extensions.DependencyInjection;
 using Yavsc.Models;
 using Yavsc.Models.Blog;
 using Yavsc.Server.Helpers;
@@ -88,6 +90,13 @@ public sealed class BlogApiTests : IClassFixture<BlogsWebServerFixture>
         };
     }
 
+    private int CountAttachmentsForPost(long postId)
+    {
+        using var scope = _fixture.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+        return db.BlogAttachedFiles.Count(a => a.PostId == postId);
+    }
+
     [Fact]
     public async Task GetBlogs_returns_200_with_empty_list_when_no_posts()
     {
@@ -321,6 +330,126 @@ public sealed class BlogApiTests : IClassFixture<BlogsWebServerFixture>
         Assert.Equal("Après", doc.RootElement[0].GetProperty("title").GetString());
     }
 
+    [Fact]
+    public async Task PutBlog_multipart_with_blog_and_file_returns_204_and_persists_attachment()
+    {
+        ResetAndSeedDefaultUser();
+        using var http = NewClient(subject: "tester");
+
+        var previousRoot = AbstractFileSystemHelpers.UserFilesDirName;
+        var tempRoot = Path.Combine(Path.GetTempPath(), "yavsc-blogs-tests-files-" + Guid.NewGuid().ToString("N"));
+        Directory.CreateDirectory(tempRoot);
+        AbstractFileSystemHelpers.UserFilesDirName = tempRoot;
+
+        try
+        {
+            var draft = new BlogPost
+            {
+                Id = 0,
+                Title = "Initial",
+                AuthorId = "tester",
+                Article = "Contenu initial.",
+                DateCreated = DateTime.UtcNow,
+                DateModified = DateTime.UtcNow
+            };
+
+            var postResponse = await http.PostAsJsonAsync(
+                _fixture.BlogSpotUrl(),
+                draft,
+                TestContext.Current.CancellationToken);
+            Assert.Equal(HttpStatusCode.Created, postResponse.StatusCode);
+
+            var created = (await postResponse.Content.ReadFromJsonAsync<BlogPost>(
+                TestContext.Current.CancellationToken))!;
+
+            var update = new BlogPost
+            {
+                Id = created.Id,
+                Title = "Mis a jour via multipart",
+                AuthorId = created.AuthorId,
+                Article = "Contenu mis a jour.",
+                DateCreated = created.DateCreated,
+                DateModified = DateTime.UtcNow
+            };
+
+            var form = new MultipartFormDataContent();
+            form.Add(new StringContent(JsonSerializer.Serialize(update)), "blog");
+
+            var fileBytes = System.Text.Encoding.UTF8.GetBytes("payload test");
+            var fileContent = new ByteArrayContent(fileBytes);
+            fileContent.Headers.ContentType = new MediaTypeHeaderValue("text/plain");
+            form.Add(fileContent, "file", "note.txt");
+
+            using var request = new HttpRequestMessage(
+                HttpMethod.Put,
+                _fixture.BlogSpotUrl() + $"/{created.Id}")
+            {
+                Content = form
+            };
+
+            var putResponse = await http.SendAsync(request, TestContext.Current.CancellationToken);
+            Assert.Equal(HttpStatusCode.NoContent, putResponse.StatusCode);
+
+            var detailsResponse = await http.GetAsync(
+                _fixture.BlogSpotUrl() + $"/{created.Id}",
+                TestContext.Current.CancellationToken);
+            Assert.Equal(HttpStatusCode.OK, detailsResponse.StatusCode);
+
+            using var detailsDoc = JsonDocument.Parse(
+                await detailsResponse.Content.ReadAsStringAsync(TestContext.Current.CancellationToken));
+            Assert.Equal("Mis a jour via multipart", detailsDoc.RootElement.GetProperty("title").GetString());
+
+            Assert.True(CountAttachmentsForPost(created.Id) >= 1);
+        }
+        finally
+        {
+            AbstractFileSystemHelpers.UserFilesDirName = previousRoot;
+            try { Directory.Delete(tempRoot, recursive: true); } catch { }
+        }
+    }
+
+    [Fact]
+    public async Task PutBlog_multipart_without_blog_field_returns_400()
+    {
+        ResetAndSeedDefaultUser();
+        using var http = NewClient(subject: "tester");
+
+        var draft = new BlogPost
+        {
+            Id = 0,
+            Title = "Initial",
+            AuthorId = "tester",
+            Article = "Contenu initial.",
+            DateCreated = DateTime.UtcNow,
+            DateModified = DateTime.UtcNow
+        };
+
+        var postResponse = await http.PostAsJsonAsync(
+            _fixture.BlogSpotUrl(),
+            draft,
+            TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.Created, postResponse.StatusCode);
+
+        var created = (await postResponse.Content.ReadFromJsonAsync<BlogPost>(
+            TestContext.Current.CancellationToken))!;
+
+        var form = new MultipartFormDataContent();
+        var fileBytes = System.Text.Encoding.UTF8.GetBytes("payload test");
+        var fileContent = new ByteArrayContent(fileBytes);
+        fileContent.Headers.ContentType = new MediaTypeHeaderValue("text/plain");
+        form.Add(fileContent, "file", "note.txt");
+
+        using var request = new HttpRequestMessage(
+            HttpMethod.Put,
+            _fixture.BlogSpotUrl() + $"/{created.Id}")
+        {
+            Content = form
+        };
+
+        var putResponse = await http.SendAsync(request, TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.BadRequest, putResponse.StatusCode);
+    }
+
     [Fact]
     public async Task DeleteBlog_removes_a_post_and_Get_returns_an_empty_list()
     {

src/Yavsc.Blogs/Controllers/BlogApiController.cs

@@ -1,5 +1,7 @@
 using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
+using System.Text.Json;
 using Yavsc.Blogspot;
 using Yavsc.Server.Exceptions;
 using Yavsc.Server.Helpers;
@@ -53,8 +55,14 @@ namespace Yavsc.Blogs.Controllers
 
         // PUT: api/v1/blogspot/5
         [HttpPut("{id}")]
-        public async Task<IActionResult> PutBlog(long id, [FromBody] Models.Blog.BlogPost blog)
+        public async Task<IActionResult> PutBlog(long id)
         {
+            var blog = await ReadPutBlogRequestAsync();
+            if (blog is null)
+            {
+                return BadRequest(ModelState);
+            }
+
             // These properties are server-managed or optional graph members and
             // should not block JSON payloads coming from API clients.
             ModelState.Remove(nameof(Models.Blog.BlogPost.Author));
@@ -73,6 +81,10 @@ namespace Yavsc.Blogs.Controllers
                 return BadRequest();
             }
 
+            var files = Request.HasFormContentType
+                ? Request.Form.Files
+                : (IFormFileCollection)new FormFileCollection();
+
             var existing = await blogSpotService.GetBlogPostAsync(id);
             if (existing == null)
             {
@@ -81,7 +93,7 @@ namespace Yavsc.Blogs.Controllers
 
             try
             {
-                await blogSpotService.Modify(User, blog);
+                await blogSpotService.Modify(User, blog, files);
             }
             catch (AuthorizationFailureException)
             {
@@ -197,6 +209,34 @@ namespace Yavsc.Blogs.Controllers
         {
             base.Dispose(disposing);
         }
+
+        private async Task<Models.Blog.BlogPost?> ReadPutBlogRequestAsync()
+        {
+            if (!Request.HasFormContentType)
+            {
+                return await Request.ReadFromJsonAsync<Models.Blog.BlogPost>();
+            }
+
+            var raw = Request.Form["blog"].ToString();
+            if (string.IsNullOrWhiteSpace(raw))
+            {
+                ModelState.AddModelError("blog", "A blog payload is required in the multipart form field 'blog'.");
+                return null;
+            }
+
+            try
+            {
+                return JsonSerializer.Deserialize<Models.Blog.BlogPost>(raw, new JsonSerializerOptions
+                {
+                    PropertyNameCaseInsensitive = true,
+                });
+            }
+            catch (JsonException ex)
+            {
+                ModelState.AddModelError("blog", $"Invalid blog JSON payload: {ex.Message}");
+                return null;
+            }
+        }
     }
 
     /// <summary>

src/Yavsc.Org.Tests/NonRegression/FileServerUrlHelpersTests.cs

@@ -0,0 +1,41 @@
+using Yavsc.Abstract.Files;
+
+namespace Yavsc.Org.Tests.NonRegression;
+
+public class FileServerUrlHelpersTests
+{
+    [Fact]
+    public void GetUserFilesBaseUri_appends_the_user_files_path_to_the_authority_root()
+    {
+        var baseUri = FileServerUrlHelpers.GetUserFilesBaseUri("https://oidc.example.org");
+
+        Assert.Equal("https://oidc.example.org/files/", baseUri.ToString());
+    }
+
+    [Fact]
+    public void GetUserFilesBaseUri_preserves_the_authority_and_discards_any_existing_path()
+    {
+        var baseUri = FileServerUrlHelpers.GetUserFilesBaseUri("https://oidc.example.org/signin");
+
+        Assert.Equal("https://oidc.example.org/files/", baseUri.ToString());
+    }
+
+    [Fact]
+    public void GetUserFilesUri_builds_an_absolute_file_url_from_a_relative_path()
+    {
+        var fileUri = FileServerUrlHelpers.GetUserFilesUri(
+            "https://oidc.example.org",
+            "/alice/inbox/report.pdf");
+
+        Assert.Equal("https://oidc.example.org/files/alice/inbox/report.pdf", fileUri.ToString());
+    }
+
+    [Fact]
+    public void GetUserFilesUri_rejects_blank_relative_path()
+    {
+        Assert.Throws<ArgumentException>(
+            () => FileServerUrlHelpers.GetUserFilesUri(
+                "https://oidc.example.org",
+                "   "));
+    }
+}

src/Yavsc.Server/Services/BlogSpotService.cs

@@ -186,6 +186,59 @@ public class BlogSpotService
         _context.SaveChanges(user.GetUserId());
     }
 
+    public async Task Modify(ClaimsPrincipal user, BlogPost blog, IFormFileCollection files)
+    {
+        await Modify(user, blog);
+
+        if (files == null || files.Count == 0)
+            return;
+
+        var userId = user.GetUserId();
+        var userEntity = _context.Users.FirstOrDefault(u => u.Id == userId);
+        if (userEntity == null)
+            return;
+
+        try
+        {
+            string blogFilesSubdir = $"blogs/{blog.Id}";
+            string destDir = Path.Combine(
+                AbstractFileSystemHelpers.UserFilesDirName,
+                userEntity.UserName,
+                blogFilesSubdir);
+            var di = new DirectoryInfo(destDir);
+            if (!di.Exists) di.Create();
+
+            foreach (var formFile in files)
+            {
+                var fileInfo = userEntity.ReceiveUserFile(destDir, formFile);
+                if (fileInfo != null && !fileInfo.QuotaOffense)
+                {
+                    var uploadedFile = new UploadedFile
+                    {
+                        Path = fileInfo.FileName,
+                        ContentType = formFile.ContentType,
+                        Length = formFile.Length
+                    };
+                    _context.UploadedFiles.Add(uploadedFile);
+                    _context.SaveChanges(userId);
+
+                    var attachment = new BlogAttachedFile
+                    {
+                        PostId = blog.Id,
+                        FileId = uploadedFile.Id
+                    };
+                    _context.BlogAttachedFiles.Add(attachment);
+                }
+            }
+
+            _context.SaveChanges(userId);
+        }
+        catch (Exception ex)
+        {
+            Debug.WriteLine($"Erreur lors du traitement des fichiers : {ex.Message}");
+        }
+    }
+
     public async Task<IEnumerable<IBlogPost>> Index(ClaimsPrincipal user, string id, int skip = 0, int take = 25)
     {
         IEnumerable<IBlogPost> posts;