1/**
2 * \file emptyfolders.c
3 * Example program that prunes empty folders.
4 *
5 * Copyright (C) 2006 Andy Kelk <andy@mopoke.co.uk>
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
21 */
22#include "common.h"
23#include <stdlib.h>
24
25static void prune_empty_folders(LIBMTP_mtpdevice_t *device, LIBMTP_file_t *files, LIBMTP_folder_t *folderlist, int do_delete)
26{
27  if(folderlist==NULL)
28    return;
29
30  if(folderlist->child == NULL) { // this *might* be empty
31    // therefore, check every file for this parent_id
32    int found = 0;
33    LIBMTP_file_t *file;
34    file = files;
35    while (file != NULL) {
36      if(file->parent_id == folderlist->folder_id) { // folder has a child
37        found = 1;
38        break;
39      }
40      file = file->next;
41    }
42
43    if(found == 0) { // no files claim this as a parent
44      printf("empty folder %u (%s)\n",folderlist->folder_id,folderlist->name);
45      if(do_delete) {
46        if (LIBMTP_Delete_Object(device,folderlist->folder_id) != 0) {
47          printf("Couldn't delete folder %u\n",folderlist->folder_id);
48	  LIBMTP_Dump_Errorstack(device);
49	  LIBMTP_Clear_Errorstack(device);
50        }
51      }
52    }
53  }
54
55  prune_empty_folders(device,files,folderlist->child,do_delete); // recurse down
56  prune_empty_folders(device,files,folderlist->sibling,do_delete); // recurse along
57}
58
59int main (int argc, char **argv)
60{
61  // check if we're doing a dummy run
62  int do_delete = 0;
63  int opt;
64
65  fprintf(stdout, "libmtp version: " LIBMTP_VERSION_STRING "\n\n");
66
67  while ( (opt = getopt(argc, argv, "d")) != -1 ) {
68    switch (opt) {
69    case 'd':
70      do_delete = 1;
71      break;
72    default:
73      break;
74    }
75  }
76
77  if(do_delete == 0) {
78    printf("This is a dummy run. No folders will be deleted.\n");
79    printf("To delete folders, use the '-d' option.\n");
80  }
81
82  LIBMTP_mtpdevice_t *device;
83  LIBMTP_folder_t *folders;
84  LIBMTP_file_t *files;
85
86  LIBMTP_Init();
87  device = LIBMTP_Get_First_Device();
88  if (device == NULL) {
89    printf("No devices.\n");
90    exit (0);
91  }
92
93  // Get file listing.
94  files = LIBMTP_Get_Filelisting_With_Callback(device,NULL,NULL);
95
96  // Get folder listing.
97  folders = LIBMTP_Get_Folder_List(device);
98
99  if(folders == NULL) {
100    printf("No folders found\n");
101  } else {
102    prune_empty_folders(device,files,folders,do_delete);
103  }
104
105  LIBMTP_destroy_folder_t(folders);
106  LIBMTP_destroy_file_t(files);
107
108  LIBMTP_Release_Device(device);
109  printf("OK.\n");
110  exit (0);
111}
112
113