feat: notify application after tool initialization

include/core/tool_initializer.h

@@ -31,6 +31,25 @@ typedef struct
     gsize version_failed_count;
 } ToolInitializationSummary;
 
+/**
+ * @brief Fonction appelée après la fin d’une initialisation.
+ *
+ * Le callback est exécuté sur le contexte principal GLib.
+ *
+ * summary est non NULL uniquement après une réussite.
+ * error est non NULL uniquement lorsqu’une erreur est disponible.
+ *
+ * Les pointeurs summary et error sont empruntés et restent valides
+ * uniquement pendant l’appel du callback.
+ */
+typedef void (*ToolInitializerCompletedCallback)(
+    ToolInitializer *tool_initializer,
+    BackgroundTaskState final_state,
+    const ToolInitializationSummary *summary,
+    const GError *error,
+    gpointer user_data
+);
+
 /**
  * @brief Codes d’erreur de ToolInitializer.
  */
@@ -150,6 +169,35 @@ ToolRegistry *tool_initializer_get_registry(
     ToolInitializer *tool_initializer
 );
 
+/**
+ * @brief Enregistre le callback appelé après chaque initialisation.
+ *
+ * Le même callback est conservé pour les lancements suivants.
+ *
+ * En passant callback == NULL, l’enregistrement actuel est supprimé.
+ *
+ * Lorsque destroy_notify est non NULL, ToolInitializer devient
+ * responsable de user_data. La fonction de destruction sera appelée
+ * exactement une fois lorsque :
+ *
+ * - le callback est remplacé ;
+ * - le callback est supprimé ;
+ * - l’initialiseur est détruit.
+ *
+ * Le callback est exécuté sur le contexte principal GLib.
+ *
+ * @param tool_initializer Initialiseur concerné.
+ * @param callback Fonction appelée après la fin, ou NULL.
+ * @param user_data Données transmises au callback.
+ * @param destroy_notify Fonction libérant user_data, ou NULL.
+ */
+void tool_initializer_set_completed_callback(
+    ToolInitializer *tool_initializer,
+    ToolInitializerCompletedCallback callback,
+    gpointer user_data,
+    GDestroyNotify destroy_notify
+);
+
 /**
  * @brief Démarre l’initialisation en arrière-plan.
  *

src/core/application.c

@@ -77,6 +77,107 @@ static void application_present_error(
     const char *message
 );
 
+/**
+ * @brief Traite la fin de l’initialisation des outils externes.
+ *
+ * Ce callback est exécuté sur le contexte principal GLib.
+ *
+ * @param tool_initializer Initialiseur ayant terminé.
+ * @param final_state État final de la tâche.
+ * @param summary Résumé emprunté en cas de réussite.
+ * @param error Erreur empruntée en cas d’échec.
+ * @param user_data Pointeur emprunté vers Application.
+ */
+static void application_on_tool_initialization_completed(
+    ToolInitializer *tool_initializer,
+    BackgroundTaskState final_state,
+    const ToolInitializationSummary *summary,
+    const GError *error,
+    gpointer user_data
+)
+{
+    Application *application = user_data;
+
+    if (application == NULL ||
+        tool_initializer == NULL)
+    {
+        return;
+    }
+
+    if (tool_initializer !=
+        application->tool_initializer)
+    {
+        g_warning(
+            "Notification reçue depuis un initialiseur inconnu."
+        );
+
+        return;
+    }
+
+    switch (final_state)
+    {
+        case BACKGROUND_TASK_STATE_COMPLETED:
+            if (summary == NULL)
+            {
+                g_warning(
+                    "L’initialisation des outils est terminée "
+                    "sans résumé valide."
+                );
+
+                return;
+            }
+
+            g_message(
+                "Outils externes initialisés : "
+                "%" G_GSIZE_FORMAT " disponibles, "
+                "%" G_GSIZE_FORMAT " absents, "
+                "%" G_GSIZE_FORMAT " versions détectées, "
+                "%" G_GSIZE_FORMAT " versions non détectées.",
+                summary->available_count,
+                summary->missing_count,
+                summary->version_detected_count,
+                summary->version_failed_count
+            );
+
+            break;
+
+        case BACKGROUND_TASK_STATE_CANCELLED:
+            g_message(
+                "L’initialisation des outils externes a été annulée."
+            );
+
+            break;
+
+        case BACKGROUND_TASK_STATE_FAILED:
+            g_warning(
+                "L’initialisation des outils externes a échoué : %s",
+                error != NULL
+                    ? error->message
+                    : "erreur inconnue"
+            );
+
+            application_present_error(
+                application,
+                "Initialisation des outils impossible",
+                error != NULL
+                    ? error->message
+                    : "Les outils externes n’ont pas pu être initialisés."
+            );
+
+            break;
+
+        case BACKGROUND_TASK_STATE_PENDING:
+        case BACKGROUND_TASK_STATE_RUNNING:
+        default:
+            g_warning(
+                "Notification de fin reçue avec un état invalide : %d.",
+                (int) final_state
+            );
+
+            break;
+    }
+}
+
 /**
  * @brief Démarre la détection asynchrone des outils externes.
  *
@@ -154,6 +255,20 @@ static void application_present_error(
     );
 }
 
+static void application_on_tool_initialization_completed(
+    ToolInitializer *tool_initializer,
+    BackgroundTaskState final_state,
+    const ToolInitializationSummary *summary,
+    const GError *error,
+    gpointer user_data
+);
+
+static void application_present_error(
+    Application *application,
+    const char *title,
+    const char *message
+);
+
 /**
  * @brief Installe une nouvelle session et son arbre dans l'application.
  *
@@ -1145,6 +1260,13 @@ Application *application_new(void)
         return NULL;
     }
 
+    tool_initializer_set_completed_callback(
+        application->tool_initializer,
+        application_on_tool_initialization_completed,
+        application,
+        NULL
+    );
+
     application->gtk_application = gtk_application_new(
         APPLICATION_ID,
         G_APPLICATION_DEFAULT_FLAGS
@@ -1219,6 +1341,16 @@ void application_free(
         return;
     }
 
+    if (application->tool_initializer != NULL)
+    {
+        tool_initializer_set_completed_callback(
+            application->tool_initializer,
+            NULL,
+            NULL,
+            NULL
+        );
+    }
+
     task_manager_cancel_all(
         application->task_manager
     );

src/core/tool_initializer.c

@@ -9,6 +9,15 @@
 #include <gio/gio.h>
 #include <glib.h>
 
+typedef struct
+{
+    gatomicrefcount reference_count;
+
+    ToolInitializerCompletedCallback callback;
+    gpointer user_data;
+    GDestroyNotify destroy_notify;
+} ToolInitializerCallbackRegistration;
+
 /**
  * @struct ToolInitializer
  * @brief État interne de l’initialiseur d’outils.
@@ -24,11 +33,89 @@ struct ToolInitializer
     BackgroundTask *task;
 
     ToolInitializationSummary last_summary;
-
+    ToolInitializerCallbackRegistration *callback_registration;
     gboolean has_last_summary;
     gboolean is_running;
 };
 
+/**
+ * @brief Enregistrement immuable d’un callback de fin.
+ */
+static ToolInitializerCallbackRegistration *
+tool_initializer_callback_registration_new(
+    ToolInitializerCompletedCallback callback,
+    gpointer user_data,
+    GDestroyNotify destroy_notify
+)
+{
+    ToolInitializerCallbackRegistration *registration = NULL;
+
+    if (callback == NULL)
+    {
+        return NULL;
+    }
+
+    registration = g_new0(
+        ToolInitializerCallbackRegistration,
+        1
+    );
+
+    g_atomic_ref_count_init(
+        &registration->reference_count
+    );
+
+    registration->callback = callback;
+    registration->user_data = user_data;
+    registration->destroy_notify = destroy_notify;
+
+    return registration;
+}
+
+static ToolInitializerCallbackRegistration *
+tool_initializer_callback_registration_ref(
+    ToolInitializerCallbackRegistration *registration
+)
+{
+    if (registration == NULL)
+    {
+        return NULL;
+    }
+
+    g_atomic_ref_count_inc(
+        &registration->reference_count
+    );
+
+    return registration;
+}
+
+static void tool_initializer_callback_registration_unref(
+    ToolInitializerCallbackRegistration *registration
+)
+{
+    if (registration == NULL)
+    {
+        return;
+    }
+
+    if (!g_atomic_ref_count_dec(
+        &registration->reference_count
+    ))
+    {
+        return;
+    }
+
+    if (registration->destroy_notify != NULL)
+    {
+        registration->destroy_notify(
+            registration->user_data
+        );
+    }
+
+    g_free(
+        registration
+    );
+}
+
 static gboolean tool_initializer_ensure_catalog_registered(
     ToolInitializer *tool_initializer,
     GError **error
@@ -69,6 +156,8 @@ static void tool_initializer_unref_internal(
     BackgroundTask *task = NULL;
     ToolRegistry *tool_registry = NULL;
 
+    ToolInitializerCallbackRegistration *callback_registration = NULL;
+
     if (tool_initializer == NULL)
     {
         return;
@@ -85,11 +174,18 @@ static void tool_initializer_unref_internal(
         &tool_initializer->mutex
     );
 
-    task = tool_initializer->task;
-    tool_registry = tool_initializer->tool_registry;
+    task =
+        tool_initializer->task;
+
+    tool_registry =
+        tool_initializer->tool_registry;
+
+    callback_registration =
+        tool_initializer->callback_registration;
 
     tool_initializer->task = NULL;
     tool_initializer->tool_registry = NULL;
+    tool_initializer->callback_registration = NULL;
     tool_initializer->task_manager = NULL;
     tool_initializer->is_running = FALSE;
 
@@ -101,6 +197,10 @@ static void tool_initializer_unref_internal(
         task
     );
 
+    tool_initializer_callback_registration_unref(
+        callback_registration
+    );
+
     tool_registry_free(
         tool_registry
     );
@@ -771,8 +871,16 @@ static void tool_initializer_bootstrap_completed(
     ToolInitializer *tool_initializer =
         user_data;
 
-    const ToolInitializationSummary *summary =
-        NULL;
+    ToolInitializerCallbackRegistration *callback_registration = NULL;
+
+    BackgroundTaskState final_state;
+
+    const ToolInitializationSummary *task_summary = NULL;
+    const ToolInitializationSummary *callback_summary = NULL;
+
+    ToolInitializationSummary summary_copy = {0};
+
+    GError *callback_error = NULL;
 
     if (task == NULL ||
         tool_initializer == NULL)
@@ -780,11 +888,31 @@ static void tool_initializer_bootstrap_completed(
         return;
     }
 
-    if (background_task_get_state(
+    final_state =
+        background_task_get_state(
             task
-    ) == BACKGROUND_TASK_STATE_COMPLETED)
+        );
+
+    if (final_state == BACKGROUND_TASK_STATE_COMPLETED)
     {
-        summary = background_task_get_result(
+        task_summary =
+            background_task_get_result(
+                task
+            );
+
+        if (task_summary != NULL)
+        {
+            summary_copy =
+                *task_summary;
+
+            callback_summary =
+                &summary_copy;
+        }
+    }
+    else if (final_state == BACKGROUND_TASK_STATE_FAILED)
+    {
+        callback_error =
+            background_task_dup_error(
                 task
             );
     }
@@ -793,20 +921,56 @@ static void tool_initializer_bootstrap_completed(
         &tool_initializer->mutex
     );
 
-    if (summary != NULL)
+    if (callback_summary != NULL)
     {
         tool_initializer->last_summary =
-            *summary;
+            summary_copy;
 
         tool_initializer->has_last_summary =
             TRUE;
     }
+    else
+    {
+        tool_initializer->last_summary =
+            (ToolInitializationSummary) {0};
+
+        tool_initializer->has_last_summary =
+            FALSE;
+    }
 
     tool_initializer->is_running = FALSE;
 
+    callback_registration =
+        tool_initializer_callback_registration_ref(
+            tool_initializer->callback_registration
+        );
+
     g_mutex_unlock(
         &tool_initializer->mutex
     );
+
+    /*
+     * Le callback utilisateur est toujours appelé hors du mutex.
+     * Il peut donc consulter l’initialiseur ou remplacer son callback.
+     */
+    if (callback_registration != NULL)
+    {
+        callback_registration->callback(
+            tool_initializer,
+            final_state,
+            callback_summary,
+            callback_error,
+            callback_registration->user_data
+        );
+    }
+
+    tool_initializer_callback_registration_unref(
+        callback_registration
+    );
+
+    g_clear_error(
+        &callback_error
+    );
 }
 
 GQuark tool_initializer_error_quark(void)
@@ -877,6 +1041,17 @@ void tool_initializer_free(
         return;
     }
 
+    /*
+     * Le propriétaire public abandonne l’initialiseur.
+     * Aucun callback ne doit désormais utiliser son user_data.
+     */
+    tool_initializer_set_completed_callback(
+        tool_initializer,
+        NULL,
+        NULL,
+        NULL
+    );
+
     task = tool_initializer_get_task(
         tool_initializer
     );
@@ -1031,16 +1206,16 @@ gboolean tool_initializer_start(
 
         tool_initializer->is_running = FALSE;
 
-        g_mutex_unlock(
-            &tool_initializer->mutex
-        );
-
         tool_initializer->last_summary =
             previous_summary;
 
         tool_initializer->has_last_summary =
             previous_has_last_summary;  
 
+        g_mutex_unlock(
+            &tool_initializer->mutex
+        );
+
         tool_initializer_set_wrapped_error(
             error,
             TOOL_INITIALIZER_ERROR_TASK_REGISTRATION,
@@ -1175,6 +1350,77 @@ gboolean tool_initializer_start(
     return TRUE;
 }
 
+void tool_initializer_set_completed_callback(
+    ToolInitializer *tool_initializer,
+    ToolInitializerCompletedCallback callback,
+    gpointer user_data,
+    GDestroyNotify destroy_notify
+)
+{
+    ToolInitializerCallbackRegistration *new_registration = NULL;
+    ToolInitializerCallbackRegistration *previous_registration = NULL;
+
+    if (callback != NULL)
+    {
+        new_registration =
+            tool_initializer_callback_registration_new(
+                callback,
+                user_data,
+                destroy_notify
+            );
+    }
+
+    if (tool_initializer == NULL)
+    {
+        tool_initializer_callback_registration_unref(
+            new_registration
+        );
+
+        /*
+         * Aucun enregistrement n’a pu prendre possession des données.
+         */
+        if (new_registration == NULL &&
+            destroy_notify != NULL)
+        {
+            destroy_notify(
+                user_data
+            );
+        }
+
+        return;
+    }
+
+    g_mutex_lock(
+        &tool_initializer->mutex
+    );
+
+    previous_registration =
+        tool_initializer->callback_registration;
+
+    tool_initializer->callback_registration =
+        new_registration;
+
+    g_mutex_unlock(
+        &tool_initializer->mutex
+    );
+
+    tool_initializer_callback_registration_unref(
+        previous_registration
+    );
+
+    /*
+     * callback == NULL signifie suppression.
+     * Les éventuelles nouvelles données ne sont pas conservées.
+     */
+    if (callback == NULL &&
+        destroy_notify != NULL)
+    {
+        destroy_notify(
+            user_data
+        );
+    }
+}
+
 gboolean tool_initializer_cancel(
     ToolInitializer *tool_initializer,
     GError **error