[gnome-software/uajain/sync-back-installed-apps-state: 7/7] transaction: Sync installed apps' state missing runtime is re-installed

[Umang Jain <uajain src gnome org>]

commit 2e8a43fdc702e656f0b48314785b6cdff4dea902
Author: Umang Jain <mailumangjain gmail com>
Date:   Fri Nov 22 12:15:37 2019 +0530

    transaction: Sync installed apps' state missing runtime is re-installed
    
    Flatpak changes [1] will start marking apps as updatable if their
    runtime component is missing on the installation. These apps will
    be shown as updatable in gnome-software updates panel but in the
    background they are meant to fetch their missing runtime.
    
    Since many apps can target one runtime, the absence of that runtime
    can make many apps show up in the updates panel. In that case,
    check if the runtime is downloaded → installed and set all
    apps' state back to "installed". This solves the case
    if users chooses to click "Update All".
    
    [1] https://github.com/flatpak/flatpak/pull/3204
    
    https://phabricator.endlessm.com/T27077

 plugins/flatpak/gs-flatpak-transaction.c | 59 ++++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
---
diff --git a/plugins/flatpak/gs-flatpak-transaction.c b/plugins/flatpak/gs-flatpak-transaction.c
index e646915c..b868887b 100644
--- a/plugins/flatpak/gs-flatpak-transaction.c
+++ b/plugins/flatpak/gs-flatpak-transaction.c
@@ -70,6 +70,58 @@ gs_flatpak_transaction_set_no_deploy (FlatpakTransaction *transaction, gboolean
 }
 #endif
 
+/* Sets installed app(s) back to installed state. Flatpak can return apps as updatable
+ * (for installing a missing runtime); if it is detected that the runtime was missing
+ * at the first place.
+ *
+ * We can determine whether a GsApp is only being updated due to a missing runtime, by checking
+ * if the current operation's ref is the GsApp's runtime and also the GsApp is already deployed.
+ */
+static void
+set_installed_app_state_if_missing_runtime_is_installed (FlatpakTransaction          *transaction,
+                                                         FlatpakTransactionOperation *operation)
+{
+       GsFlatpakTransaction *self = GS_FLATPAK_TRANSACTION (transaction);
+       FlatpakInstallation *installation = flatpak_transaction_get_installation (transaction);
+       const gchar *op_ref = flatpak_transaction_operation_get_ref (operation);
+       g_autoptr(GList) apps = NULL;
+
+       if (g_str_has_prefix (op_ref, "app/"))
+               return;
+
+       apps = g_hash_table_get_values (self->refhash);
+       for (GList *l = apps; l != NULL; l = l->next) {
+               GsApp *app = l->data;
+               GsApp *app_runtime;
+               g_autofree gchar *app_runtime_ref = NULL;
+
+               app_runtime = gs_app_get_runtime (app);
+               if (app_runtime == NULL)
+                       continue;
+
+               app_runtime_ref = gs_flatpak_app_get_ref_display (app_runtime);
+               if (app_runtime_ref != NULL &&
+                   g_strcmp0 (app_runtime_ref, op_ref) == 0) {
+                       g_autoptr(FlatpakInstalledRef) app_ref = NULL;
+                       g_autoptr(GBytes) metadata = NULL;
+
+                       app_ref = flatpak_installation_get_installed_ref (installation,
+                                                                         FLATPAK_REF_KIND_APP,
+                                                                         gs_flatpak_app_get_ref_name (app),
+                                                                         gs_flatpak_app_get_ref_arch (app),
+                                                                         gs_app_get_branch (app),
+                                                                         NULL, NULL);
+                       if (app_ref == NULL)
+                               return;
+
+                       metadata = flatpak_installed_ref_load_metadata (app_ref, NULL, NULL);
+                       /* This makes sure that the app is already deployed. */
+                       if (metadata != NULL)
+                               gs_app_set_state (app, AS_APP_STATE_INSTALLED);
+               }
+       }
+}
+
 /* Checks if a ref is a related ref to one of the installed ref.
  * If yes, return the GsApp corresponding to the installed ref,
  * NULL otherwise.
@@ -331,7 +383,14 @@ _transaction_operation_done (FlatpakTransaction *transaction,
                main_app = get_installed_main_app_of_related_ref (transaction, operation);
                if (main_app != NULL)
                        gs_app_set_state (main_app, AS_APP_STATE_INSTALLED);
+
+               /* Do the same as above but if the main app is missing its runtime.
+                * Multiple GsApp can depend on one (missing) runtime, hence set state to "installed"
+                * state for all those apps too.
+                */
+               set_installed_app_state_if_missing_runtime_is_installed (transaction, operation);
 #endif
+               /* For all other trivial cases. */
                gs_app_set_state (app, AS_APP_STATE_INSTALLED);
                break;
        case FLATPAK_TRANSACTION_OPERATION_INSTALL_BUNDLE: