backups: Simplify listing repositories in index page

- Use sort_order property to decide which type of repositories should be listed
  first.

- Remove getting repositories of a given type and retrieve all of them at the
  same time.

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

plinth/modules/backups/repository.py

@@ -80,7 +80,6 @@ KNOWN_ERRORS = [{
 
 class BaseBorgRepository(abc.ABC):
     """Base class for all kinds of Borg repositories."""
-    uuid = None
     flags = {}
     is_mounted = True
 
@@ -142,6 +141,7 @@ class BaseBorgRepository(abc.ABC):
     def get_view_content(self):
         """Get archives with additional information as needed by the view"""
         repository = {
+            'uuid': self.uuid,
             'name': self.name,
             'storage_type': self.storage_type,
             'flags': self.flags,
@@ -296,10 +296,12 @@ class RootBorgRepository(BaseBorgRepository):
     storage_type = 'root'
     name = ROOT_REPOSITORY_NAME
     repo_path = ROOT_REPOSITORY
+    sort_order = 10
     is_mounted = True
 
     def __init__(self, path, credentials=None):
         """Initialize the repository object."""
+        self.uuid = ROOT_REPOSITORY_UUID
         if credentials is None:
             credentials = {}
 
@@ -314,6 +316,7 @@ class BorgRepository(BaseBorgRepository):
     """General Borg repository implementation."""
     KNOWN_CREDENTIALS = ['encryption_passphrase']
     storage_type = 'disk'
+    sort_order = 20
     flags = {'removable': True}
 
     @property
@@ -334,6 +337,7 @@ class SshBorgRepository(BaseBorgRepository):
         'ssh_keyfile', 'ssh_password', 'encryption_passphrase'
     ]
     storage_type = 'ssh'
+    sort_order = 30
     flags = {'removable': True, 'mountable': True}
 
     @property
@@ -404,34 +408,16 @@ class SshBorgRepository(BaseBorgRepository):
         return (arguments, kwargs)
 
 
-def get_repositories(storage_type):
+def get_repositories():
     """Get all repositories of a given storage type."""
-    if storage_type == 'disk':
-        return _get_disk_repositories()
+    repositories = [create_repository(ROOT_REPOSITORY_UUID)]
+    for uuid in network_storage.get_storages():
+        repositories.append(create_repository(uuid))
 
-    return _get_ssh_repositories()
-
-
-def _get_ssh_repositories():
-    """Get all SSH Repositories including the archive content"""
-    repositories = {}
-    for storage in network_storage.get_storages().values():
-        if storage['storage_type'] == 'ssh':
-            repository = SshBorgRepository(**storage)
-            repositories[storage['uuid']] = repository.get_view_content()
-
-    return repositories
-
-
-def _get_disk_repositories():
-    """Get all disk repositories including the archive content"""
-    repositories = {}
-    for storage in network_storage.get_storages().values():
-        if storage['storage_type'] == 'disk':
-            repository = BorgRepository(**storage)
-            repositories[storage['uuid']] = repository.get_view_content()
-
-    return repositories
+    return [
+        repository.get_view_content()
+        for repository in sorted(repositories, key=lambda x: x.sort_order)
+    ]
 
 
 def create_repository(uuid):

plinth/modules/backups/templates/backups.html

@@ -60,14 +60,8 @@
 
   <h3>{% trans 'Existing Backups' %}</h3>
 
-  {% include "backups_repository.inc" with repository=root_repository uuid='root' %}
-
-  {% for uuid,repository in ssh_repositories.items %}
-    {% include "backups_repository.inc" %}
-  {% endfor %}
-
-  {% for uuid,repository in disk_repositories.items %}
-    {% include "backups_repository.inc" %}
+  {% for repository in repositories %}
+    {% include "backups_repository.inc" with uuid=repository.uuid %}
   {% endfor %}
 
   <a title="{% trans 'Add a backup location' %}"

plinth/modules/backups/views.py

@@ -38,12 +38,12 @@ from django.views.generic import FormView, TemplateView, View
 from plinth.errors import PlinthError
 from plinth.modules import backups, storage
 
-from . import (ROOT_REPOSITORY, SESSION_PATH_VARIABLE, api, forms,
+from . import (SESSION_PATH_VARIABLE, api, forms,
                get_known_hosts_path, is_ssh_hostkey_verified, network_storage,
                split_path)
 from .decorators import delete_tmp_backup_file
 from .errors import BorgRepositoryDoesNotExistError
-from .repository import (BorgRepository, RootBorgRepository, SshBorgRepository,
+from .repository import (BorgRepository, SshBorgRepository,
                          create_repository, get_repositories)
 
 logger = logging.getLogger(__name__)
@@ -60,10 +60,7 @@ class IndexView(TemplateView):
         context['title'] = backups.name
         context['description'] = backups.description
         context['manual_page'] = backups.manual_page
-        root_repository = RootBorgRepository(path=ROOT_REPOSITORY)
-        context['root_repository'] = root_repository.get_view_content()
-        context['ssh_repositories'] = get_repositories('ssh')
-        context['disk_repositories'] = get_repositories('disk')
+        context['repositories'] = get_repositories()
         return context