[recipes] Add api to update chefs

[Matthias Clasen <matthiasc src gnome org>]

commit 5d1de5eca449f19f1035a362feda3f4e30df50b0
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jan 31 08:00:41 2017 +0100

    Add api to update chefs
    
    This is similar to the corresponding API for recipes.
    It ensures that we get the proper store signals emitted
    when a chef changes.

 src/gr-recipe-store.c |   39 +++++++++++++++++++++++++++++++++++++++
 src/gr-recipe-store.h |    4 ++++
 2 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/src/gr-recipe-store.c b/src/gr-recipe-store.c
index cb41d42..c7d246e 100644
--- a/src/gr-recipe-store.c
+++ b/src/gr-recipe-store.c
@@ -1297,6 +1297,45 @@ gr_recipe_store_add_chef (GrRecipeStore  *self,
 }
 
 gboolean
+gr_recipe_store_update_chef (GrRecipeStore  *self,
+                             GrChef         *chef,
+                             const char     *old_id,
+                             GError        **error)
+{
+        const char *id;
+        GrChef *old;
+
+        g_object_ref (chef);
+
+        id = gr_chef_get_id (chef);
+
+        if (id == NULL || id[0] == '\0') {
+                g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                             _("You need to provide an ID for the chef"));
+                return FALSE;
+        }
+        if (strcmp (id, old_id) != 0 &&
+            g_hash_table_contains (self->chefs, id)) {
+                g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
+                             _("A chef with this ID already exists"));
+                return FALSE;
+        }
+
+        old = g_hash_table_lookup (self->chefs, old_id);
+        g_assert (chef == old);
+
+        g_hash_table_remove (self->chefs, old_id);
+        g_hash_table_insert (self->chefs, g_strdup (id), g_object_ref (chef));
+
+        g_signal_emit (self, chefs_changed_signal, 0);
+        save_chefs (self);
+
+        g_object_unref (chef);
+
+        return TRUE;
+}
+
+gboolean
 gr_recipe_store_update_user (GrRecipeStore  *self,
                              GrChef         *chef,
                              GError        **error)
diff --git a/src/gr-recipe-store.h b/src/gr-recipe-store.h
index 3c03efc..f1da9c3 100644
--- a/src/gr-recipe-store.h
+++ b/src/gr-recipe-store.h
@@ -52,6 +52,10 @@ gboolean        gr_recipe_store_recipe_is_pick      (GrRecipeStore  *self,
 gboolean        gr_recipe_store_add_chef            (GrRecipeStore  *self,
                                                      GrChef         *chef,
                                                      GError        **error);
+gboolean        gr_recipe_store_update_chef         (GrRecipeStore  *self,
+                                                     GrChef         *chef,
+                                                     const char     *old_id,
+                                                     GError        **error);
 GrChef         *gr_recipe_store_get_chef            (GrRecipeStore  *self,
                                                      const char     *id);
 char          **gr_recipe_store_get_chef_keys       (GrRecipeStore  *self,