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
prune_empty_folders(LIBMTP_mtpdevice_t * device,LIBMTP_file_t * files,LIBMTP_folder_t * folderlist,int do_delete)25 static 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
main(int argc,char ** argv)59 int 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