RdvQuery from PostIt

ROADMAP.md

@@ -68,7 +68,7 @@ Trois principes non négociables traversent tous les jalons :
 >
 > Chaque jalon a un **critère de sortie** vérifiable.
 
-### Jalon 0 — Fondations techniques *(en cours)*
+### Jalon 0 — Fondations techniques
 
 > Cible : pouvoir parler du domaine sans se battre avec le runtime.
 
@@ -81,7 +81,7 @@ Trois principes non négociables traversent tous les jalons :
 
 ---
 
-### Jalon 1 — Prestation signée de bout en bout
+### Jalon 1 — Prestation signée de bout en bout *(en cours)*
 
 > Cible : un projet client/fournisseur aboutit à un **devis signé par les deux parties**, traçable, avec notifications.
 

src/PostIt/PostIt.Tests/ActivitiesPageViewModelTests.cs

@@ -12,12 +12,15 @@ public class ActivitiesPageViewModelTests
     {
         var api = new StubActivityApi();
         var client = new ActivityApiClient(api, "https://business.example/api/v1/");
+        var billingClient = new BillingApiClient(api, "https://business.example/api/v1/");
 
         await client.GetCatalogAsync("brush", TestContext.Current.CancellationToken);
         await client.GetUsersAsync("brush-pro", TestContext.Current.CancellationToken);
+        await billingClient.CreateAsync("Rdv", new { Foo = "Bar" }, TestContext.Current.CancellationToken);
 
         Assert.Equal("https://business.example/api/v1/activity/catalog?parentCode=brush", api.Paths[0]);
         Assert.Equal("https://business.example/api/v1/activity/brush-pro/users", api.Paths[1]);
+        Assert.Equal("https://business.example/api/v1/billing/Rdv", api.Paths[2]);
     }
 
     [Fact]
@@ -25,7 +28,8 @@ public class ActivitiesPageViewModelTests
     {
         var api = new StubActivityApi();
         var client = new ActivityApiClient(api, "https://business.example/api/v1/");
-        var vm = new ActivitiesPageViewModel(client);
+        var billingClient = new BillingApiClient(api, "https://business.example/api/v1/");
+        var vm = new ActivitiesPageViewModel(client, billingClient);
 
         await vm.RefreshAsync();
 
@@ -76,6 +80,10 @@ public class ActivitiesPageViewModelTests
                         Name = "Brush",
                         Description = "Coiffure à domicile",
                         PerformerCount = 1,
+                        Forms = new List<CommandFormSummaryDto>
+                        {
+                            new() { Id = 1, ActionName = "Rdv", Title = "Rendez-vous" }
+                        },
                         Children = new List<ActivityBrowseItemDto>
                         {
                             new()
@@ -85,6 +93,10 @@ public class ActivitiesPageViewModelTests
                                 Description = "Spécialisation premium",
                                 ParentCode = "brush",
                                 PerformerCount = 1,
+                                Forms = new List<CommandFormSummaryDto>
+                                {
+                                    new() { Id = 2, ActionName = "Rdv", Title = "Rendez-vous premium" }
+                                }
                             }
                         }
                     }

src/PostIt/PostIt.Tests/BillingCommandPageViewModelTests.cs

@@ -0,0 +1,82 @@
+using System.Net.Http;
+using System.Text.Json;
+using PostIt.ViewModels;
+using Yavsc;
+using Yavsc.Abstract.Workflow;
+using Yavsc.Api.Client;
+
+namespace PostIt.Tests;
+
+public class BillingCommandPageViewModelTests
+{
+    [Fact]
+    public async Task SubmitAsync_posts_rdv_payload_to_selected_billing_route()
+    {
+        var api = new RecordingApi();
+        var client = new BillingApiClient(api, "https://business.example/api/v1/");
+        var vm = new BillingCommandPageViewModel(
+            new ActivityBrowseItemDto { Code = "dev", Name = "Développement" },
+            new ActivityUserDisplayItem { PerformerId = "perf-1", UserName = "Alice" },
+            new CommandFormSummaryDto { Id = 12, ActionName = "Rdv", Title = "Rendez-vous" },
+            client)
+        {
+            EventDateText = "2026-09-02 14:30",
+            Reason = "Point de cadrage",
+            Address = "1 rue du Test",
+            LatitudeText = "48.8566",
+            LongitudeText = "2.3522",
+            Consent = true,
+        };
+
+        await vm.SubmitCommand.ExecuteAsync(null);
+
+        Assert.Equal("https://business.example/api/v1/billing/Rdv", api.LastPath);
+        Assert.NotNull(api.LastBody);
+
+        using var json = JsonDocument.Parse(JsonSerializer.Serialize(api.LastBody));
+        Assert.Equal("dev", json.RootElement.GetProperty("ActivityCode").GetString());
+        Assert.Equal("perf-1", json.RootElement.GetProperty("PerformerId").GetString());
+        Assert.Equal("Point de cadrage", json.RootElement.GetProperty("Reason").GetString());
+        Assert.Equal((int)QueryStatus.Inserted, json.RootElement.GetProperty("Status").GetInt32());
+    }
+
+    [Fact]
+    public async Task SubmitAsync_refuses_unsupported_billing_code()
+    {
+        var api = new RecordingApi();
+        var client = new BillingApiClient(api, "https://business.example/api/v1/");
+        var vm = new BillingCommandPageViewModel(
+            new ActivityBrowseItemDto { Code = "brush", Name = "Brush" },
+            new ActivityUserDisplayItem { PerformerId = "perf-2", UserName = "Bob" },
+            new CommandFormSummaryDto { Id = 13, ActionName = "Brush", Title = "Coupe" },
+            client);
+
+        await vm.SubmitCommand.ExecuteAsync(null);
+
+        Assert.Null(api.LastPath);
+        Assert.Contains("n'est pas encore pris en charge", vm.StatusMessage, StringComparison.OrdinalIgnoreCase);
+    }
+
+    private sealed class RecordingApi : IYavscApiClient
+    {
+        public HttpClient Http { get; } = new();
+        public string? LastPath { get; private set; }
+        public object? LastBody { get; private set; }
+
+        public Task<T> CallAsync<T>(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastPath = path;
+            LastBody = body;
+            return Task.FromResult(default(T)!);
+        }
+
+        public Task CallAsync(HttpMethod method, string path, object? body = null, CancellationToken ct = default)
+        {
+            LastPath = path;
+            LastBody = body;
+            return Task.CompletedTask;
+        }
+
+        public ValueTask DisposeAsync() => ValueTask.CompletedTask;
+    }
+}

src/PostIt/PostIt/Helpers/ServiceCollectionHelpers.cs

@@ -24,6 +24,7 @@ public static class ServiceCollectionHelpers
         var blogAclClient = new BlogAclApiClient(api, settings.BlogsApiUrl);
         var userSearchClient = new UserSearchClient(api, settings.BlogsApiUrl);
         var activityClient = new ActivityApiClient(api, settings.BusinessApiUrl);
+        var billingClient = new BillingApiClient(api, settings.BusinessApiUrl);
         var userDirectory = new UserDirectory(userSearchClient);
 
         // Vues
@@ -47,6 +48,8 @@ public static class ServiceCollectionHelpers
         services.AddSingleton<SignaturePage>();
         services.AddSingleton<CirclesPage>();
         services.AddSingleton<ActivitiesPage>();
+        services.AddTransient<CommandFormsPage>();
+        services.AddTransient<BillingCommandPage>();
         // ViewModels
         services.AddSingleton(settings);
         services.AddSingleton<YavscApiClient>(api);
@@ -55,6 +58,7 @@ public static class ServiceCollectionHelpers
         services.AddSingleton(blogAclClient);
         services.AddSingleton(userSearchClient);
         services.AddSingleton(activityClient);
+        services.AddSingleton(billingClient);
         services.AddSingleton<IUserDirectory>(userDirectory);
         services.AddSingleton<HomePageViewModel>();
         services.AddSingleton<SignaturePageViewModel>();

src/PostIt/PostIt/ViewLocator.cs

@@ -40,6 +40,8 @@ public class ViewLocator : IDataTemplate
             Settings => services.GetRequiredService<SettingsPage>(),
             HomePageViewModel => services.GetRequiredService<HomePage>(),
             ActivitiesPageViewModel => services.GetRequiredService<ActivitiesPage>(),
+            CommandFormsPageViewModel => services.GetRequiredService<CommandFormsPage>(),
+            BillingCommandPageViewModel => services.GetRequiredService<BillingCommandPage>(),
             SignaturePageViewModel => services.GetRequiredService<SignaturePage>(),
             AddCircleMemberDialogViewModel => services.GetRequiredService<AddCircleMemberDialog>(),
             CirclesPageViewModel => services.GetRequiredService<CirclesPage>(),

src/PostIt/PostIt/ViewModels/ActivitiesPageViewModel.cs

@@ -4,8 +4,10 @@ using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Threading.Tasks;
+using Avalonia;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using PostIt.Helpers;
 using Yavsc.Abstract.Workflow;
 using Yavsc.Api.Client;
 
@@ -14,6 +16,7 @@ namespace PostIt.ViewModels;
 public partial class ActivitiesPageViewModel : ViewModelBase
 {
     private readonly ActivityApiClient _client;
+    private readonly BillingApiClient _billingClient;
     private bool _syncingSelection;
 
     [ObservableProperty]
@@ -31,6 +34,9 @@ public partial class ActivitiesPageViewModel : ViewModelBase
     [ObservableProperty]
     public partial ObservableCollection<ActivityUserDisplayItem> Performers { get; set; } = new();
 
+    [ObservableProperty, NotifyCanExecuteChangedFor(nameof(OpenCommandFormsCommand))]
+    public partial ActivityUserDisplayItem? SelectedPerformer { get; set; }
+
     [ObservableProperty]
     public partial bool IsBusy { get; set; }
 
@@ -40,6 +46,7 @@ public partial class ActivitiesPageViewModel : ViewModelBase
     public ActivityBrowseItemDto? CurrentActivity => SelectedSpecialization ?? SelectedActivity;
     public string SelectedActivityLabel => SelectedActivity?.Name ?? "(aucune activité)";
     public string CurrentActivityLabel => CurrentActivity?.Name ?? "(aucune)";
+    public int CurrentFormCount => CurrentActivity?.Forms?.Count ?? 0;
 
     public override bool CanNavigateNext
     {
@@ -53,9 +60,10 @@ public partial class ActivitiesPageViewModel : ViewModelBase
         protected set { _ = value; }
     }
 
-    public ActivitiesPageViewModel(ActivityApiClient client)
+    public ActivitiesPageViewModel(ActivityApiClient client, BillingApiClient billingClient)
     {
         _client = client ?? throw new ArgumentNullException(nameof(client));
+        _billingClient = billingClient ?? throw new ArgumentNullException(nameof(billingClient));
     }
 
     partial void OnSelectedActivityChanged(ActivityBrowseItemDto? value)
@@ -154,11 +162,13 @@ public partial class ActivitiesPageViewModel : ViewModelBase
         OnPropertyChanged(nameof(CurrentActivity));
         OnPropertyChanged(nameof(SelectedActivityLabel));
         OnPropertyChanged(nameof(CurrentActivityLabel));
+        OnPropertyChanged(nameof(CurrentFormCount));
         Specializations = new ObservableCollection<ActivityBrowseItemDto>(activity?.Children ?? new());
 
         if (activity is null)
         {
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
+            SelectedPerformer = null;
             return;
         }
 
@@ -179,6 +189,7 @@ public partial class ActivitiesPageViewModel : ViewModelBase
 
         OnPropertyChanged(nameof(CurrentActivity));
         OnPropertyChanged(nameof(CurrentActivityLabel));
+        OnPropertyChanged(nameof(CurrentFormCount));
 
         if (specialization is null)
         {
@@ -200,21 +211,47 @@ public partial class ActivitiesPageViewModel : ViewModelBase
             var list = await _client.GetUsersAsync(activity.Code);
             Performers = new ObservableCollection<ActivityUserDisplayItem>((list ?? new())
                 .Select(ActivityUserDisplayItem.FromDto));
+            SelectedPerformer = null;
             StatusMessage = $"{activity.Name} · {Performers.Count} utilisateur(s)";
         }
         catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
         {
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
+            SelectedPerformer = null;
             StatusMessage = "Accès refusé pour les activités (scope 'api'). Déconnectez puis reconnectez-vous.";
         }
         catch (Exception ex)
         {
             Performers = new ObservableCollection<ActivityUserDisplayItem>();
+            SelectedPerformer = null;
             StatusMessage = $"Erreur: {ex.Message}";
         }
         finally
         {
             IsBusy = false;
+            OpenCommandFormsCommand.NotifyCanExecuteChanged();
         }
     }
+
+    private bool CanOpenCommandForms()
+        => SelectedPerformer is not null && CurrentActivity?.Forms?.Count > 0;
+
+    [RelayCommand(CanExecute = nameof(CanOpenCommandForms))]
+    private async Task OpenCommandFormsAsync()
+    {
+        if (SelectedPerformer is null || CurrentActivity is null)
+        {
+            StatusMessage = "Sélectionnez un utilisateur et une activité avec formulaire.";
+            return;
+        }
+
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        var vm = new CommandFormsPageViewModel(CurrentActivity, SelectedPerformer, _billingClient);
+        await app.PushPageAsync(vm);
+    }
 }

src/PostIt/PostIt/ViewModels/BillingCommandPageViewModel.cs

@@ -0,0 +1,183 @@
+using System;
+using System.Globalization;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Yavsc;
+using Yavsc.Abstract.Workflow;
+using Yavsc.Api.Client;
+using Yavsc.Models.Billing;
+using Yavsc.Models.Relationship;
+
+namespace PostIt.ViewModels;
+
+public partial class BillingCommandPageViewModel : ViewModelBase
+{
+    private readonly BillingApiClient _billingClient;
+
+    public ActivityBrowseItemDto Activity { get; }
+    public ActivityUserDisplayItem Performer { get; }
+    public CommandFormSummaryDto Form { get; }
+
+    [ObservableProperty]
+    public partial bool IsBusy { get; set; }
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; }
+
+    [ObservableProperty]
+    public partial string EventDateText { get; set; }
+
+    [ObservableProperty]
+    public partial string Reason { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string Address { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string LatitudeText { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial string LongitudeText { get; set; } = string.Empty;
+
+    [ObservableProperty]
+    public partial bool Consent { get; set; } = true;
+
+    public string Title => Form.Title;
+    public string PerformerLabel => Performer.UserName;
+    public string ActivityLabel => Activity.Name;
+    public bool IsSupported => string.Equals(Form.ActionName, BillingCodes.Rdv, StringComparison.Ordinal);
+    public string BillingRoute => $"/billing/{Form.ActionName}";
+    public string SupportMessage => IsSupported
+        ? "Complétez les informations du rendez-vous puis postez la commande."
+        : $"Le formulaire {Form.ActionName} n'est pas encore pris en charge dans PostIt.";
+
+    public override bool CanNavigateNext
+    {
+        get => false;
+        protected set { _ = value; }
+    }
+
+    public override bool CanNavigatePrevious
+    {
+        get => true;
+        protected set { _ = value; }
+    }
+
+    public BillingCommandPageViewModel(
+        ActivityBrowseItemDto activity,
+        ActivityUserDisplayItem performer,
+        CommandFormSummaryDto form,
+        BillingApiClient billingClient)
+    {
+        Activity = activity ?? throw new ArgumentNullException(nameof(activity));
+        Performer = performer ?? throw new ArgumentNullException(nameof(performer));
+        Form = form ?? throw new ArgumentNullException(nameof(form));
+        _billingClient = billingClient ?? throw new ArgumentNullException(nameof(billingClient));
+
+        EventDateText = DateTime.Now.AddDays(1).ToString("yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
+        StatusMessage = SupportMessage;
+    }
+
+    [RelayCommand]
+    private async Task SubmitAsync()
+    {
+        if (!IsSupported)
+        {
+            StatusMessage = SupportMessage;
+            return;
+        }
+
+        if (!Consent)
+        {
+            StatusMessage = "Le consentement est requis pour poster la commande.";
+            return;
+        }
+
+        if (!TryParseEventDate(out var eventDate))
+        {
+            StatusMessage = "La date doit être saisie au format yyyy-MM-dd HH:mm.";
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(Reason))
+        {
+            StatusMessage = "Le motif du rendez-vous est requis.";
+            return;
+        }
+
+        if (string.IsNullOrWhiteSpace(Address))
+        {
+            StatusMessage = "L'adresse du rendez-vous est requise.";
+            return;
+        }
+
+        if (!TryParseCoordinate(LatitudeText, out var latitude))
+        {
+            StatusMessage = "Latitude invalide.";
+            return;
+        }
+
+        if (!TryParseCoordinate(LongitudeText, out var longitude))
+        {
+            StatusMessage = "Longitude invalide.";
+            return;
+        }
+
+        IsBusy = true;
+        try
+        {
+            await _billingClient.CreateAsync(Form.ActionName, new
+            {
+                ActivityCode = Activity.Code,
+                PerformerId = Performer.PerformerId,
+                Consent,
+                EventDate = eventDate,
+                Location = new Location
+                {
+                    Address = Address.Trim(),
+                    Latitude = latitude,
+                    Longitude = longitude,
+                },
+                Reason = Reason.Trim(),
+                Status = QueryStatus.Inserted,
+            }).ConfigureAwait(true);
+
+            StatusMessage = $"Commande transmise sur {BillingRoute} pour {Performer.UserName}.";
+        }
+        catch (HttpRequestException ex) when (ex.StatusCode is HttpStatusCode.Unauthorized or HttpStatusCode.Forbidden)
+        {
+            StatusMessage = "Accès refusé au billing (scope 'api'). Déconnectez puis reconnectez-vous.";
+        }
+        catch (Exception ex)
+        {
+            StatusMessage = $"Erreur lors de l'envoi: {ex.Message}";
+        }
+        finally
+        {
+            IsBusy = false;
+        }
+    }
+
+    private bool TryParseEventDate(out DateTime eventDate)
+    {
+        return DateTime.TryParse(
+            EventDateText,
+            CultureInfo.CurrentCulture,
+            DateTimeStyles.AssumeLocal,
+            out eventDate)
+            || DateTime.TryParse(
+                EventDateText,
+                CultureInfo.InvariantCulture,
+                DateTimeStyles.AssumeLocal,
+                out eventDate);
+    }
+
+    private static bool TryParseCoordinate(string text, out double value)
+    {
+        return double.TryParse(text, NumberStyles.Float | NumberStyles.AllowThousands, CultureInfo.CurrentCulture, out value)
+            || double.TryParse(text, NumberStyles.Float | NumberStyles.AllowThousands, CultureInfo.InvariantCulture, out value);
+    }
+}

src/PostIt/PostIt/ViewModels/CommandFormsPageViewModel.cs

@@ -0,0 +1,82 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using PostIt.Helpers;
+using Yavsc.Abstract.Workflow;
+using Yavsc.Api.Client;
+
+namespace PostIt.ViewModels;
+
+public partial class CommandFormsPageViewModel : ViewModelBase
+{
+    private readonly BillingApiClient _billingClient;
+
+    public ActivityBrowseItemDto Activity { get; }
+    public ActivityUserDisplayItem Performer { get; }
+
+    [ObservableProperty]
+    public partial ObservableCollection<CommandFormSummaryDto> Forms { get; set; }
+
+    [ObservableProperty, NotifyCanExecuteChangedFor(nameof(OpenSelectedFormCommand))]
+    public partial CommandFormSummaryDto? SelectedForm { get; set; }
+
+    [ObservableProperty]
+    public partial string StatusMessage { get; set; }
+
+    public string Title => $"Formulaires pour {Performer.UserName}";
+    public string ContextLabel => $"{Activity.Name} · {Forms.Count} formulaire(s)";
+
+    public override bool CanNavigateNext
+    {
+        get => false;
+        protected set { _ = value; }
+    }
+
+    public override bool CanNavigatePrevious
+    {
+        get => true;
+        protected set { _ = value; }
+    }
+
+    public CommandFormsPageViewModel(
+        ActivityBrowseItemDto activity,
+        ActivityUserDisplayItem performer,
+        BillingApiClient billingClient)
+    {
+        Activity = activity ?? throw new ArgumentNullException(nameof(activity));
+        Performer = performer ?? throw new ArgumentNullException(nameof(performer));
+        _billingClient = billingClient ?? throw new ArgumentNullException(nameof(billingClient));
+
+        Forms = new ObservableCollection<CommandFormSummaryDto>((activity.Forms ?? new())
+            .OrderBy(f => f.Title)
+            .ThenBy(f => f.ActionName));
+        SelectedForm = Forms.FirstOrDefault();
+        StatusMessage = Forms.Count == 0
+            ? "Aucun formulaire n'est disponible pour cette activité."
+            : "Choisissez le formulaire à utiliser.";
+    }
+
+    private bool CanOpenSelectedForm() => SelectedForm is not null;
+
+    [RelayCommand(CanExecute = nameof(CanOpenSelectedForm))]
+    private async Task OpenSelectedFormAsync()
+    {
+        if (SelectedForm is null)
+        {
+            StatusMessage = "Sélectionnez un formulaire.";
+            return;
+        }
+
+        var app = (App?)Application.Current;
+        if (app is null)
+        {
+            throw new InvalidOperationException("Application PostIt indisponible.");
+        }
+
+        await app.PushPageAsync(new BillingCommandPageViewModel(Activity, Performer, SelectedForm, _billingClient));
+    }
+}

src/PostIt/PostIt/Views/ActivitiesPage.axaml

@@ -65,12 +65,14 @@
                 </ListBox>
             </Grid>
 
-            <Grid Grid.Column="4" RowDefinitions="Auto,Auto,*">
+            <Grid Grid.Column="4" RowDefinitions="Auto,Auto,*,Auto">
                 <TextBlock Grid.Row="0" Text="Utilisateurs" FontWeight="Bold" Margin="0,0,0,8" />
                 <TextBlock Grid.Row="1"
                            Text="{Binding CurrentActivityLabel, StringFormat='Activité affichée : {0}'}"
                            FontSize="11" Opacity="0.7" Margin="0,0,0,8" />
-                <ListBox Grid.Row="2" ItemsSource="{Binding Performers}">
+                <ListBox Grid.Row="2"
+                         ItemsSource="{Binding Performers}"
+                         SelectedItem="{Binding SelectedPerformer, Mode=TwoWay}">
                     <ListBox.ItemTemplate>
                         <DataTemplate x:DataType="vm:ActivityUserDisplayItem">
                             <StackPanel Spacing="2" Margin="0,0,0,8">
@@ -104,6 +106,10 @@
                         </DataTemplate>
                     </ListBox.ItemTemplate>
                 </ListBox>
+                <Button Grid.Row="3"
+                        Margin="0,8,0,0"
+                        Content="Voir les formulaires"
+                        Command="{Binding OpenCommandFormsCommand}" />
             </Grid>
         </Grid>
 

src/PostIt/PostIt/Views/BillingCommandPage.axaml

@@ -0,0 +1,68 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             x:Class="PostIt.Views.BillingCommandPage"
+             x:DataType="vm:BillingCommandPageViewModel"
+             Header="Commande billing">
+    <ScrollViewer>
+        <Grid RowDefinitions="Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto" ColumnDefinitions="Auto,*" Margin="12">
+            <TextBlock Grid.Row="0" Grid.ColumnSpan="2"
+                       Text="{Binding Title}"
+                       FontSize="18"
+                       FontWeight="Bold" />
+
+            <TextBlock Grid.Row="1" Grid.ColumnSpan="2"
+                       Margin="0,4,0,12"
+                       Text="{Binding SupportMessage}"
+                       TextWrapping="Wrap"
+                       Opacity="0.8" />
+
+            <TextBlock Grid.Row="2" Text="Utilisateur" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="2" Grid.Column="1" Text="{Binding PerformerLabel}" IsReadOnly="True" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="3" Text="Activité" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="3" Grid.Column="1" Text="{Binding ActivityLabel}" IsReadOnly="True" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="4" Text="Date" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="4" Grid.Column="1" Text="{Binding EventDateText, Mode=TwoWay}" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="5" Text="Motif" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="5" Grid.Column="1" Text="{Binding Reason, Mode=TwoWay}" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="6" Text="Adresse" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="6" Grid.Column="1" Text="{Binding Address, Mode=TwoWay}" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="7" Text="Latitude" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="7" Grid.Column="1" Text="{Binding LatitudeText, Mode=TwoWay}" Margin="0,0,0,8" />
+
+            <TextBlock Grid.Row="8" Text="Longitude" VerticalAlignment="Center" Margin="0,0,12,8" />
+            <TextBox Grid.Row="8" Grid.Column="1" Text="{Binding LongitudeText, Mode=TwoWay}" Margin="0,0,0,8" />
+
+            <CheckBox Grid.Row="9" Grid.ColumnSpan="2"
+                      Content="Je consens à la création de cette commande"
+                      IsChecked="{Binding Consent, Mode=TwoWay}"
+                      Margin="0,4,0,12" />
+
+            <Grid Grid.Row="10" Grid.ColumnSpan="2" ColumnDefinitions="Auto,12,*,Auto">
+                <Button Grid.Column="0"
+                        Content="Poster la commande"
+                        Command="{Binding SubmitCommand}"
+                        IsEnabled="{Binding IsSupported}" />
+                <TextBox Grid.Column="2"
+                         Text="{Binding StatusMessage}"
+                         IsReadOnly="True"
+                         AcceptsReturn="True"
+                         TextWrapping="Wrap"
+                         BorderThickness="0"
+                         BorderBrush="Transparent"
+                         Padding="0"
+                         Background="Transparent"
+                         VerticalAlignment="Center" />
+                <ProgressBar Grid.Column="3"
+                             Width="120"
+                             IsIndeterminate="True"
+                             IsVisible="{Binding IsBusy}" />
+            </Grid>
+        </Grid>
+    </ScrollViewer>
+</ContentPage>

src/PostIt/PostIt/Views/BillingCommandPage.axaml.cs

@@ -0,0 +1,17 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PostIt.Views;
+
+public partial class BillingCommandPage : ContentPage
+{
+    public BillingCommandPage()
+    {
+        InitializeComponent();
+    }
+
+    private void InitializeComponent()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+}

src/PostIt/PostIt/Views/CommandFormsPage.axaml

@@ -0,0 +1,50 @@
+<ContentPage xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
+             xmlns:wf="using:Yavsc.Abstract.Workflow"
+             x:Class="PostIt.Views.CommandFormsPage"
+             x:DataType="vm:CommandFormsPageViewModel"
+             Header="Formulaires">
+    <Grid RowDefinitions="Auto,Auto,*,Auto" Margin="12">
+        <TextBlock Grid.Row="0"
+                   Text="{Binding Title}"
+                   FontSize="18"
+                   FontWeight="Bold" />
+
+        <TextBlock Grid.Row="1"
+                   Margin="0,4,0,12"
+                   Text="{Binding ContextLabel}"
+                   Opacity="0.75" />
+
+        <ListBox Grid.Row="2"
+                 ItemsSource="{Binding Forms}"
+                 SelectedItem="{Binding SelectedForm, Mode=TwoWay}">
+            <ListBox.ItemTemplate>
+                <DataTemplate x:DataType="wf:CommandFormSummaryDto">
+                    <StackPanel Spacing="2" Margin="0,0,0,10">
+                        <TextBlock Text="{Binding Title}" FontWeight="Bold" />
+                        <TextBlock Text="{Binding ActionName, StringFormat='Route billing : /billing/{0}'}"
+                                   FontSize="11"
+                                   Opacity="0.7" />
+                    </StackPanel>
+                </DataTemplate>
+            </ListBox.ItemTemplate>
+        </ListBox>
+
+        <Grid Grid.Row="3" Margin="0,12,0,0" ColumnDefinitions="Auto,12,*,Auto">
+            <Button Grid.Column="0"
+                    Content="Ouvrir le formulaire"
+                    Command="{Binding OpenSelectedFormCommand}" />
+            <TextBox Grid.Column="2"
+                     Text="{Binding StatusMessage}"
+                     IsReadOnly="True"
+                     AcceptsReturn="True"
+                     TextWrapping="Wrap"
+                     BorderThickness="0"
+                     BorderBrush="Transparent"
+                     Padding="0"
+                     Background="Transparent"
+                     VerticalAlignment="Center" />
+        </Grid>
+    </Grid>
+</ContentPage>

src/PostIt/PostIt/Views/CommandFormsPage.axaml.cs

@@ -0,0 +1,17 @@
+using Avalonia.Controls;
+using Avalonia.Markup.Xaml;
+
+namespace PostIt.Views;
+
+public partial class CommandFormsPage : ContentPage
+{
+    public CommandFormsPage()
+    {
+        InitializeComponent();
+    }
+
+    private void InitializeComponent()
+    {
+        AvaloniaXamlLoader.Load(this);
+    }
+}

src/Yavsc.Api.Client/ActivityApiClient.cs

@@ -10,7 +10,9 @@ namespace Yavsc.Api.Client;
 /// <summary>
 /// HTTP client for browsing business activities and their performers.
 /// Uses absolute URLs so it can coexist with other Yavsc clients that
-/// target a different API host on the same shared transport.
+/// target a different API host on the same shared transport. The same
+/// activity payload also carries the eligible billing forms for a
+/// selected performer/activity pair.
 /// </summary>
 public sealed class ActivityApiClient
 {

src/Yavsc.Api.Client/BillingApiClient.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Yavsc.Api.Client;
+
+/// <summary>
+/// HTTP client for posting commands to the business billing routes.
+/// Uses absolute URLs so it can coexist with blog-targeting clients on
+/// the same shared transport.
+/// </summary>
+public sealed class BillingApiClient
+{
+    private const string PathPrefix = "billing";
+
+    private readonly IYavscApiClient _api;
+    private readonly Uri _baseAddress;
+
+    public BillingApiClient(IYavscApiClient api, string businessBaseAddress)
+    {
+        _api = api ?? throw new ArgumentNullException(nameof(api));
+        if (string.IsNullOrWhiteSpace(businessBaseAddress))
+            throw new ArgumentException("Base address is required.", nameof(businessBaseAddress));
+
+        _baseAddress = new Uri(businessBaseAddress, UriKind.Absolute);
+    }
+
+    public Task CreateAsync(string billingCode, object payload, CancellationToken ct = default)
+    {
+        if (string.IsNullOrWhiteSpace(billingCode))
+            throw new ArgumentException("Billing code is required.", nameof(billingCode));
+
+        return _api.CallAsync(
+            HttpMethod.Post,
+            Absolute($"{PathPrefix}/{Uri.EscapeDataString(billingCode)}"),
+            body: payload,
+            ct: ct);
+    }
+
+    private string Absolute(string relativePath) => new Uri(_baseAddress, relativePath).ToString();
+}

src/Yavsc.Api.Test/Fixtures/ApiWebServerFixture.cs

@@ -188,6 +188,30 @@ public sealed class ApiWebServerFixture : WebHostFixture
         db.SaveChanges();
     }
 
+    public void ResetAndSeedRdvQueryGraph()
+    {
+        ResetAndSeedActivityGraph();
+
+        using var scope = Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
+
+        var location = db.Locations.Single(l => l.Address == "1 rue du Test");
+
+        db.RdvQueries.Add(new RdvQuery
+        {
+            ActivityCode = "dev",
+            ClientId = "alice",
+            PerformerId = "alice",
+            Consent = true,
+            EventDate = DateTime.UtcNow.AddDays(1),
+            Location = location,
+            Reason = "Initial rendez-vous",
+            Status = Yavsc.QueryStatus.Inserted,
+        });
+
+        db.SaveChanges();
+    }
+
     public override void Dispose()
     {
         try

src/Yavsc.Api.Test/RdvQueryApiControllerTests.cs

@@ -0,0 +1,85 @@
+using System.Net;
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using Yavsc;
+using Yavsc.Api.Test.Fixtures;
+using Yavsc.Models.Workflow;
+using Yavsc.Tests.Shared;
+
+namespace Yavsc.Api.Test;
+
+[Collection("Yavsc Api")]
+public sealed class RdvQueryApiControllerTests : IClassFixture<ApiWebServerFixture>
+{
+    private readonly ApiWebServerFixture _fixture;
+
+    public RdvQueryApiControllerTests(ApiWebServerFixture fixture)
+    {
+        _fixture = fixture;
+    }
+
+    private HttpClient NewClient(string subject = "alice", string scope = "api")
+    {
+        var handler = new HttpClientHandler
+        {
+            ServerCertificateCustomValidationCallback = (_, _, _, _) => true
+        };
+
+        var http = new HttpClient(handler)
+        {
+            BaseAddress = new Uri(_fixture.BaseAddress)
+        };
+        http.DefaultRequestHeaders.Authorization =
+            new AuthenticationHeaderValue("Bearer", TestTokenIssuer.Issue(subject, scope));
+        return http;
+    }
+
+    [Fact]
+    public async Task Billing_rdv_route_supports_crud()
+    {
+        _fixture.ResetAndSeedRdvQueryGraph();
+        using var http = NewClient();
+
+        var createPayload = new RdvQuery
+        {
+            ActivityCode = "dev",
+            PerformerId = "alice",
+            Consent = true,
+            EventDate = DateTime.UtcNow.AddDays(2),
+            Location = new Yavsc.Models.Relationship.Location
+            {
+                Address = "1 rue du Test",
+                Latitude = 48.8566,
+                Longitude = 2.3522,
+            },
+            Reason = "Second rendez-vous",
+            Status = QueryStatus.Inserted,
+        };
+
+        var createResponse = await http.PostAsJsonAsync("/api/v1/billing/Rdv", createPayload, TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.Created, createResponse.StatusCode);
+
+        var created = await createResponse.Content.ReadFromJsonAsync<RdvQuery>(TestContext.Current.CancellationToken);
+        Assert.NotNull(created);
+        Assert.NotEqual(0, created!.Id);
+        Assert.Equal("alice", created.ClientId);
+
+        var getResponse = await http.GetAsync($"/api/v1/billing/Rdv/{created.Id}", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, getResponse.StatusCode);
+
+        var fetched = await getResponse.Content.ReadFromJsonAsync<RdvQuery>(TestContext.Current.CancellationToken);
+        Assert.NotNull(fetched);
+        Assert.Equal(created.Id, fetched!.Id);
+        Assert.Equal("Second rendez-vous", fetched.Reason);
+
+        fetched.Reason = "Rendez-vous modifié";
+        var putResponse = await http.PutAsJsonAsync($"/api/v1/billing/Rdv/{fetched.Id}", fetched, TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.NoContent, putResponse.StatusCode);
+
+        var deleteResponse = await http.DeleteAsync($"/api/v1/billing/Rdv/{fetched.Id}", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.OK, deleteResponse.StatusCode);
+
+        var missingResponse = await http.GetAsync($"/api/v1/billing/Rdv/{fetched.Id}", TestContext.Current.CancellationToken);
+        Assert.Equal(HttpStatusCode.NotFound, missingResponse.StatusCode);
+    }
+}

src/Yavsc.Api/Controllers/Business/RdvQueryApiController.cs

@@ -0,0 +1,190 @@
+using System.Security.Claims;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using Yavsc.Models;
+using Yavsc.Models.Billing;
+using Yavsc.Models.Workflow;
+using Yavsc.Server.Helpers;
+
+namespace Yavsc.Controllers;
+
+[Authorize]
+[Produces("application/json")]
+[Route(Constants.APIPrefix + "/billing/" + BillingCodes.Rdv)]
+public class RdvQueryApiController : Controller
+{
+    private readonly ApplicationDbContext _context;
+
+    public RdvQueryApiController(ApplicationDbContext context)
+    {
+        _context = context;
+    }
+
+    [HttpGet]
+    public async Task<IActionResult> GetQueries(CancellationToken cancellationToken)
+    {
+        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
+
+        var queries = await _context.RdvQueries
+            .AsNoTracking()
+            .Include(q => q.Location)
+            .Include(q => q.Client)
+            .Include(q => q.PerformerProfile)
+            .Where(q => q.ClientId == uid || q.PerformerId == uid)
+            .OrderByDescending(q => q.Id)
+            .ToListAsync(cancellationToken);
+
+        return Ok(queries);
+    }
+
+    [HttpGet("{id}", Name = "GetRdvQuery")]
+    public async Task<IActionResult> GetQuery([FromRoute] long id, CancellationToken cancellationToken)
+    {
+        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
+
+        var query = await _context.RdvQueries
+            .Include(q => q.Location)
+            .Include(q => q.Client)
+            .Include(q => q.PerformerProfile)
+            .SingleOrDefaultAsync(q => q.Id == id, cancellationToken);
+
+        if (query is null)
+        {
+            return NotFound();
+        }
+
+        if (query.ClientId != uid && query.PerformerId != uid && !User.IsInRole(Constants.AdminGroupName))
+        {
+            return Forbid();
+        }
+
+        return Ok(query);
+    }
+
+    [HttpPost]
+    public async Task<IActionResult> PostQuery([FromBody] RdvQuery query, CancellationToken cancellationToken)
+    {
+        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
+        if (string.IsNullOrWhiteSpace(query.ClientId))
+        {
+            query.ClientId = uid;
+        }
+
+        ModelState.MarkFieldSkipped("ClientId");
+
+        if (query.ClientId != uid && !User.IsInRole(Constants.AdminGroupName))
+        {
+            ModelState.AddModelError("ClientId", "You can only create your own RdvQuery");
+            return BadRequest(ModelState);
+        }
+
+        if (!ModelState.IsValid)
+        {
+            return BadRequest(ModelState);
+        }
+
+        if (query.Location is not null)
+        {
+            var existingLocation = await _context.Locations.FirstOrDefaultAsync(
+                x => x.Address == query.Location.Address
+                  && x.Longitude == query.Location.Longitude
+                  && x.Latitude == query.Location.Latitude,
+                cancellationToken);
+
+            if (existingLocation is not null)
+            {
+                query.Location = existingLocation;
+            }
+            else
+            {
+                _context.Attach(query.Location);
+            }
+        }
+
+        _context.RdvQueries.Add(query);
+
+        try
+        {
+            await _context.SaveChangesAsync(User.GetUserId(), cancellationToken);
+        }
+        catch (DbUpdateException)
+        {
+            if (QueryExists(query.Id))
+            {
+                return Conflict();
+            }
+
+            throw;
+        }
+
+        return CreatedAtRoute("GetRdvQuery", new { id = query.Id }, query);
+    }
+
+    [HttpPut("{id}")]
+    public async Task<IActionResult> PutQuery([FromRoute] long id, [FromBody] RdvQuery query, CancellationToken cancellationToken)
+    {
+        if (!ModelState.IsValid)
+        {
+            return BadRequest(ModelState);
+        }
+
+        if (id != query.Id)
+        {
+            return BadRequest();
+        }
+
+        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
+        if (query.ClientId != uid && !User.IsInRole(Constants.AdminGroupName))
+        {
+            return Forbid();
+        }
+
+        _context.Entry(query).State = EntityState.Modified;
+
+        try
+        {
+            await _context.SaveChangesAsync(User.GetUserId(), cancellationToken);
+        }
+        catch (DbUpdateConcurrencyException)
+        {
+            if (!QueryExists(id))
+            {
+                return NotFound();
+            }
+
+            throw;
+        }
+
+        return NoContent();
+    }
+
+    [HttpDelete("{id}")]
+    public async Task<IActionResult> DeleteQuery([FromRoute] long id, CancellationToken cancellationToken)
+    {
+        var uid = User.FindFirstValue(ClaimTypes.NameIdentifier);
+
+        var query = await _context.RdvQueries
+            .SingleOrDefaultAsync(q => q.Id == id, cancellationToken);
+
+        if (query is null)
+        {
+            return NotFound();
+        }
+
+        if (query.ClientId != uid && !User.IsInRole(Constants.AdminGroupName))
+        {
+            return Forbid();
+        }
+
+        _context.RdvQueries.Remove(query);
+        await _context.SaveChangesAsync(User.GetUserId(), cancellationToken);
+
+        return Ok(query);
+    }
+
+    private bool QueryExists(long id)
+    {
+        return _context.RdvQueries.Any(e => e.Id == id);
+    }
+}

src/Yavsc.Server/Models/Workflow/RdvQuery.cs

@@ -46,7 +46,8 @@ namespace Yavsc.Models.Workflow
         {
             get
             {
-                string type = ResourcesHelpers.GlobalLocalizer[this.GetType().Name];
+                var localizer = ResourcesHelpers.GlobalLocalizer;
+                string type = localizer is null ? this.GetType().Name : localizer[this.GetType().Name];
                 return $"{_description} {type}";
             }
             set