[snap] showing a warning popup when the Snap API is out

CHANGELOG.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Snap:
     - not waiting for the categories file to be retrieved from the cloud during application boot ( reduces boot time )
     - caching cloud categories to the disk so they can be used in scenarios when it is not possible to retrieve them ( e.g: internet is off )
+    - showing a warning popup when the Snap API is out
 - minor thread improvements
 
 ### UI

bauh/gems/snap/controller.py

@@ -188,6 +188,12 @@ class SnapManager(SoftwareManager):
             return [self.i18n['snap.notification.snapd_unavailable'].format(bold('snapd'), snap_bold),
                     self.i18n['snap.notification.snap.disable'].format(snap_bold, bold(self.i18n['manage_window.settings.gems']))]
 
+        available, output = snap.is_api_available()
+
+        if not available:
+            self.logger.warning('It seems Snap API is not available. Search output: {}'.format(output))
+            return [self.i18n['snap.notifications.api.unavailable'].format(bold('Snaps'), bold('Snap'))]
+
     def _fill_suggestion(self, pkg_name: str, priority: SuggestionPriority, out: List[PackageSuggestion]):
         res = self.http_client.get_json(SNAP_API_URL + '/search?q=package_name:{}'.format(pkg_name))
 

bauh/gems/snap/resources/locale/en

@@ -1,6 +1,7 @@
 gem.snap.info=Applications published at https://snapcraft.io/store
 snap.notification.snapd_unavailable={} seems not to be installed or enabled. {} packages will not be available.
 snap.notification.snap.disable=If you do not want to use Snap applications, uncheck {} in {}
+snap.notifications.api.unavailable=It seems the {} API is unavailable at the moment. It will not be possible to search for new {} applications.
 snap.action.refresh.status=Refreshing
 snap.action.refresh.label=Refresh
 snap.install.available_channels.title=Available channels

bauh/gems/snap/resources/locale/es

@@ -12,6 +12,7 @@ snap.info.version=versión
 snap.info.size=tamaño
 snap.notification.snapd_unavailable={} no parece estar instalado o habilitado. Los paquetes {} estarán indisponibles.
 snap.notification.snap.disable=Si no desea usar aplicativos Snap, desmarque {} en {}
+snap.notifications.api.unavailable = Parece que la API de {} no está disponible en este momento. No será posible buscar nuevos aplicativos {}}.
 snap.action.refresh.status=Actualizando
 snap.action.refresh.label=Actualizar
 snap.install.available_channels.title=Canales disponibles

bauh/gems/snap/resources/locale/pt

@@ -12,6 +12,7 @@ snap.info.version=versão
 snap.info.size=tamanho
 snap.notification.snapd_unavailable={} não parece estar instalado ou habilitado. Os pacotes {} estarão indisponíveis.
 snap.notification.snap.disable=Se não deseja usar aplicativos Snap, desmarque {} em {}
+snap.notifications.api.unavailable=Parece que a API de {} está indisponível no momento. Não será possível buscar novos aplicativos {}.
 snap.action.refresh.status=Atualizando
 snap.action.refresh.label=Atualizar
 snap.install.available_channels.title=Canais disponíveis

bauh/gems/snap/snap.py

@@ -1,7 +1,8 @@
 import logging
 import re
 import subprocess
-from typing import List
+from io import StringIO
+from typing import List, Tuple
 
 from bauh.commons.system import new_root_subprocess, run_cmd, new_subprocess, SimpleProcess
 from bauh.gems.snap.model import SnapApplication
@@ -227,3 +228,14 @@ def run(app: SnapApplication, logger: logging.Logger):
         logger.error("No valid command found for '{}'".format(app_name))
     else:
         logger.error("No command found for '{}'".format(app_name))
+
+
+def is_api_available() -> Tuple[bool, str]:
+    output = StringIO()
+    for o in SimpleProcess(['snap', 'search']).instance.stdout:
+        if o:
+            output.write(o.decode())
+
+    output.seek(0)
+    output = output.read()
+    return 'error:' not in output, output