ebook-device: Implement the list command for MTP devices

src/calibre/devices/mtp/driver.py

@@ -145,6 +145,34 @@ class MTP_DEVICE(BASE):
         self.current_device_defaults, self.current_vid, self.current_pid = self.device_defaults(device, self)
         self.calibre_file_paths = self.current_device_defaults.get(
             'calibre_file_paths', {'metadata':self.METADATA_CACHE, 'driveinfo':self.DRIVEINFO})
+        if self.current_vid == 0x1949:
+            try:
+                self.sync_kindle_thumbnails()
+            except Exception:
+                import traceback
+                traceback.print_exc()
+
+    def sync_kindle_thumbnails(self):
+        raise NotImplementedError('TODO: Implement me')
+
+    def list(self, path, recurse=False):
+        if path.startswith('/'):
+            q = self._main_id
+            path = path[1:]
+        elif path.startswith('card:/'):
+            q = self._carda_id
+            path = path[6:]
+        for storage in self.filesystem_cache.entries:
+            if storage.storage_id == q:
+                if path:
+                    path = path.replace(os.sep, '/')
+                    parts = path.split('/')
+                    if parts:
+                        storage = storage.find_path(parts)
+                        if storage is None:
+                            return []
+                return list(storage.list(recurse))
+        return []
 
     def get_device_uid(self):
         return self.current_serial_num

src/calibre/devices/mtp/filesystem_cache.py

@@ -7,9 +7,11 @@ __docformat__ = 'restructuredtext en'
 
 import json
 import sys
+import time
 import weakref
 from collections import deque
 from datetime import datetime
+from itertools import chain
 from operator import attrgetter
 
 from calibre import force_unicode, human_readable, prints
@@ -21,6 +23,17 @@ from polyglot.builtins import itervalues
 bexts = frozenset(BOOK_EXTENSIONS) - {'mbp', 'tan', 'rar', 'zip', 'xml'}
 
 
+class ListEntry:
+
+    def __init__(self, entry: 'FileOrFolder'):
+        self.is_dir = entry.is_folder
+        self.is_readonly = not entry.can_delete
+        self.path = '/'.join(entry.full_path)
+        self.name = entry.name
+        self.size = entry.size
+        self.ctime = self.wtime = time.mktime(entry.last_modified.timetuple())
+
+
 class FileOrFolder:
 
     def __init__(self, entry, fs_cache):
@@ -139,6 +152,17 @@ class FileOrFolder:
             for e in sorted(c, key=lambda x:sort_key(x.name)):
                 e.dump(prefix=prefix+'  ', out=out)
 
+    def list(self, recurse=False):
+        if not self.is_folder:
+            parent = self.id_map[self.parent_id]
+            yield '/'.join(parent.full_path[1:]), ListEntry(self)
+            return
+        entries = [ListEntry(x) for x in chain(self.folders, self.files)]
+        yield '/'.join(self.full_path[1:]), entries
+        if recurse:
+            for x in self.folders:
+                yield from x.list(recurse=True)
+
     def folder_named(self, name):
         name = lower(name)
         for e in self.folders: