nextcloud: Implement enable/disable container

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/action_utils.py

@@ -11,6 +11,8 @@ import subprocess
 import tempfile
 from contextlib import contextmanager
 
+import augeas
+
 logger = logging.getLogger(__name__)
 
 UWSGI_ENABLED_PATH = '/etc/uwsgi/apps-enabled/{config_name}.ini'
@@ -553,6 +555,46 @@ WantedBy=default.target
     service_daemon_reload()
 
 
+def _podman_augeus(container_name: str):
+    """Return an augues instance to edit container configuration file."""
+    aug = augeas.Augeas(flags=augeas.Augeas.NO_LOAD +
+                        augeas.Augeas.NO_MODL_AUTOLOAD)
+    container = f'/etc/containers/systemd/{container_name}.container'
+    aug.transform('Systemd', container)
+    aug.set('/augeas/context', '/files' + container)
+    aug.load()
+    return aug
+
+
+def podman_is_enabled(container_name: str) -> bool:
+    """Return whether the container to start on boot."""
+    aug = _podman_augeus(container_name)
+    aug = _podman_augeus(container_name)
+    value = 'default.target'
+    key = 'Install/WantedBy'
+    return any(
+        (aug.get(match_ + '/value') == value for match_ in aug.match(key)))
+
+
+def podman_enable(container_name: str):
+    """Enable container to start on boot."""
+    aug = _podman_augeus(container_name)
+    value = 'default.target'
+    key = 'Install/WantedBy'
+    found = any(
+        (aug.get(match_ + '/value') == value for match_ in aug.match(key)))
+    if not found:
+        aug.set(f'{key}[last() +1]/value', value)
+        aug.save()
+
+
+def podman_disable(container_name: str):
+    """Disable container to start on boot."""
+    aug = _podman_augeus(container_name)
+    aug.remove('Install/WantedBy')
+    aug.save()
+
+
 def podman_uninstall(container_name: str, volume_name: str, image_name: str,
                      volume_path: str):
     """Remove a podman container's components and systemd unit."""

plinth/modules/nextcloud/__init__.py

@@ -105,7 +105,7 @@ class NextcloudApp(app_module.App):
         daemon = SharedDaemon('shared-daemon-nextcloud-mysql', 'mysql')
         self.add(daemon)
 
-        daemon = Daemon('daemon-nextcloud', 'nextcloud-freedombox')
+        daemon = NextcloudDaemon('daemon-nextcloud', 'nextcloud-freedombox')
         self.add(daemon)
 
         daemon = Daemon('daemon-nextcloud-timer',
@@ -145,6 +145,24 @@ class NextcloudApp(app_module.App):
         return results
 
 
+class NextcloudDaemon(Daemon):
+    """Component to manage Nextcloud container service."""
+
+    def is_enabled(self):
+        """Return if the daemon/unit is enabled."""
+        return privileged.is_enabled()
+
+    def enable(self):
+        """Run operations to enable the daemon/unit."""
+        super().enable()
+        privileged.enable()
+
+    def disable(self):
+        """Run operations to disable the daemon/unit."""
+        super().disable()
+        privileged.disable()
+
+
 class NextcloudBackupRestore(BackupRestore):
     """Component to backup/restore Nextcloud."""
 

plinth/modules/nextcloud/privileged.py

@@ -86,6 +86,24 @@ def _run_occ(*args, **kwargs) -> subprocess.CompletedProcess:
     return _run_in_container('/var/www/html/occ', *args, **kwargs)
 
 
+@privileged
+def is_enabled() -> bool:
+    """Return if the systemd container service is enabled."""
+    return action_utils.podman_is_enabled(CONTAINER_NAME)
+
+
+@privileged
+def enable():
+    """Enable the systemd container service."""
+    action_utils.podman_enable(CONTAINER_NAME)
+
+
+@privileged
+def disable():
+    """Disable the systemd container service."""
+    action_utils.podman_disable(CONTAINER_NAME)
+
+
 @privileged
 def get_domain():
     """Return domain name set in Nextcloud."""