/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
*
* Copyright (C) 2000 Ximian, Inc.
*
* Authors: Michael Zucchi <notzed@ximian.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <dirent.h>
#include "camel-mh-store.h"
#include "camel-mh-folder.h"
#include "camel-exception.h"
#include "camel-url.h"
#include "camel-private.h"
#include <camel/camel-stream-fs.h>
#include <camel/camel-stream-buffer.h>
static CamelLocalStoreClass *parent_class = NULL;
#define d(x)
/* Returns the class for a CamelMhStore */
#define CMHS_CLASS(so) CAMEL_MH_STORE_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CF_CLASS(so) CAMEL_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
#define CMHF_CLASS(so) CAMEL_MH_FOLDER_CLASS (CAMEL_OBJECT_GET_CLASS(so))
static void construct (CamelService *service, CamelSession *session, CamelProvider *provider, CamelURL *url, CamelException *ex);
static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex);
static CamelFolder *get_inbox (CamelStore *store, CamelException *ex);
static void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex);
static void rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex);
static CamelFolderInfo * get_folder_info (CamelStore *store, const char *top, guint32 flags, CamelException *ex);
static void camel_mh_store_class_init(CamelObjectClass * camel_mh_store_class)
{
CamelStoreClass *camel_store_class = CAMEL_STORE_CLASS(camel_mh_store_class);
CamelServiceClass *camel_service_class = CAMEL_SERVICE_CLASS(camel_mh_store_class);
parent_class = (CamelLocalStoreClass *)camel_type_get_global_classfuncs(camel_local_store_get_type());
/* virtual method overload, use defaults for most */
camel_service_class->construct = construct;
camel_store_class->get_folder = get_folder;
camel_store_class->get_inbox = get_inbox;
camel_store_class->delete_folder = delete_folder;
camel_store_class->rename_folder = rename_folder;
camel_store_class->get_folder_info = get_folder_info;
}
CamelType camel_mh_store_get_type(void)
{
static CamelType camel_mh_store_type = CAMEL_INVALID_TYPE;
if (camel_mh_store_type == CAMEL_INVALID_TYPE) {
camel_mh_store_type = camel_type_register(CAMEL_LOCAL_STORE_TYPE, "CamelMhStore",
sizeof(CamelMhStore),
sizeof(CamelMhStoreClass),
(CamelObjectClassInitFunc) camel_mh_store_class_init,
NULL,
NULL,
NULL);
}
return camel_mh_store_type;
}
static void
construct (CamelService *service, CamelSession *session, CamelProvider *provider, CamelURL *url, CamelException *ex)
{
CamelMhStore *mh_store = (CamelMhStore *)service;
CAMEL_SERVICE_CLASS (parent_class)->construct (service, session, provider, url, ex);
if (camel_exception_is_set (ex))
return;
if (camel_url_get_param(url, "dotfolders"))
mh_store->flags |= CAMEL_MH_DOTFOLDERS;
}
enum {
UPDATE_NONE,
UPDATE_ADD,
UPDATE_REMOVE,
};
/* update the .folders file if it exists, or create it if it doesn't */
static void
folders_update(const char *root, const char *folder, int mode)
{
char *tmp, *tmpnew, *line = NULL;
CamelStream *stream, *in = NULL, *out = NULL;
tmpnew = alloca(strlen(root)+16);
sprintf(tmpnew, "%s.folders~", root);
out = camel_stream_fs_new_with_name(tmpnew, O_WRONLY|O_CREAT|O_TRUNC, 0666);
if (out == NULL)
goto fail;
tmp = alloca(strlen(root)+16);
sprintf(tmp, "%s.folders", root);
stream = camel_stream_fs_new_with_name(tmp, O_RDONLY, 0);
if (stream) {
in = camel_stream_buffer_new(stream, CAMEL_STREAM_BUFFER_READ);
camel_object_unref(stream);
}
if (in == NULL || stream == NULL) {
if (mode == UPDATE_ADD && camel_stream_printf(out, "%s\n", folder) == -1)
goto fail;
goto done;
}
while ((line = camel_stream_buffer_read_line((CamelStreamBuffer *)in))) {
int copy = TRUE;
switch (mode) {
case UPDATE_REMOVE:
if (strcmp(line, folder) == 0)
copy = FALSE;
break;
case UPDATE_ADD: {
int cmp = strcmp(line, folder);
if (cmp > 0) {
/* found insertion point */
if (camel_stream_printf(out, "%s\n", folder) == -1)
goto fail;
mode = UPDATE_NONE;
} else if (tmp == 0) {
/* already there */
mode = UPDATE_NONE;
}
break; }
case UPDATE_NONE:
break;
}
if (copy && camel_stream_printf(out, "%s\n", line) == -1)
goto fail;
g_free(line);
line = NULL;
}
/* add to end? */
if (mode == UPDATE_ADD && camel_stream_printf(out, "%s\n", folder) == -1)
goto fail;
if (camel_stream_close(out) == -1)
goto fail;
done:
/* should we care if this fails? I suppose so ... */
rename(tmpnew, tmp);
fail:
unlink(tmpnew); /* remove it if its there */
g_free(line);
if (in)
camel_object_unref(in);
if (out)
camel_object_unref(out);
}
static CamelFolder *
get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex)
{
char *name;
struct stat st;
if (!((CamelStoreClass *)parent_class)->get_folder(store, folder_name, flags, ex))
return NULL;
name = g_strdup_printf("%s%s", CAMEL_LOCAL_STORE(store)->toplevel_dir, folder_name);
if (stat(name, &st) == -1) {
if (errno != ENOENT) {
camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not open folder `%s':\n%s"),
folder_name, g_strerror(errno));
g_free (name);
return NULL;
}
if ((flags & CAMEL_STORE_FOLDER_CREATE) == 0) {
camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
_("Folder `%s' does not exist."), folder_name);
g_free (name);
return NULL;
}
if (mkdir(name, 0700) != 0) {
camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not create folder `%s':\n%s"),
folder_name, g_strerror(errno));
g_free (name);
return NULL;
}
/* add to .folders if we are supposed to */
/* FIXME: throw exception on error */
if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS)
folders_update(((CamelLocalStore *)store)->toplevel_dir, folder_name, UPDATE_ADD);
} else if (!S_ISDIR(st.st_mode)) {
camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
_("`%s' is not a directory."), name);
g_free (name);
return NULL;
}
g_free(name);
return camel_mh_folder_new(store, folder_name, flags, ex);
}
static CamelFolder *
get_inbox (CamelStore *store, CamelException *ex)
{
return get_folder (store, "inbox", 0, ex);
}
static void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex)
{
char *name;
/* remove folder directory - will fail if not empty */
name = g_strdup_printf("%s%s", CAMEL_LOCAL_STORE(store)->toplevel_dir, folder_name);
if (rmdir(name) == -1) {
camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
_("Could not delete folder `%s': %s"),
folder_name, strerror(errno));
g_free(name);
return;
}
g_free(name);
/* remove from .folders if we are supposed to */
if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS)
folders_update(((CamelLocalStore *)store)->toplevel_dir, folder_name, UPDATE_REMOVE);
/* and remove metadata */
((CamelStoreClass *)parent_class)->delete_folder(store, folder_name, ex);
}
static void
rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex)
{
CamelException e;
camel_exception_init(&e);
((CamelStoreClass *)parent_class)->rename_folder(store, old, new, &e);
if (camel_exception_is_set(&e)) {
camel_exception_xfer(ex, &e);
return;
}
camel_exception_clear(&e);
if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS) {
/* yeah this is messy, but so is mh! */
folders_update(((CamelLocalStore *)store)->toplevel_dir, new, UPDATE_ADD);
folders_update(((CamelLocalStore *)store)->toplevel_dir, old, UPDATE_REMOVE);
}
}
static CamelFolderInfo *folder_info_new(CamelStore *store, const char *root, const char *path)
{
CamelFolderInfo *fi;
char *base;
CamelFolder *folder;
base = strrchr(path, '/');
/* Build the folder info structure. */
fi = g_malloc0(sizeof(*fi));
fi->url = g_strdup_printf("mh:%s#%s", root, path);
fi->full_name = g_strdup(path);
fi->name = g_strdup(base?base+1:path);
fi->unread_message_count = 0;
/* check unread count if open */
CAMEL_STORE_LOCK(store, cache_lock);
folder = g_hash_table_lookup(store->folders, path);
if (folder) {
if ((((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_FAST) == 0)
camel_folder_refresh_info(folder, NULL);
fi->unread_message_count = camel_folder_get_unread_message_count(folder);
}
CAMEL_STORE_UNLOCK(store, cache_lock);
/* We could: if we have no folder, and FAST isn't specified, perform a full
scan of all messages for their status flags. But its probably not worth
it as we need to read the top of every file, i.e. very very slow */
camel_folder_info_build_path(fi, '/');
d(printf("New folderinfo:\n '%s'\n '%s'\n '%s'\n", fi->full_name, fi->url, fi->path));
return fi;
}
/* used to find out where we've visited already */
struct _inode {
dev_t dnode;
ino_t inode;
};
/* Scan path, under root, for directories to add folders for. Both
* root and path should have a trailing "/" if they aren't empty. */
static void recursive_scan(CamelStore *store, CamelFolderInfo **fip, CamelFolderInfo *parent, GHashTable *visited, const char *root, const char *path)
{
char *fullpath, *tmp;
DIR *dp;
struct dirent *d;
struct stat st;
CamelFolderInfo *fi;
struct _inode in, *inew;
/* Open the specified directory. */
if (path[0]) {
fullpath = alloca(strlen(root)+strlen(path)+2);
sprintf(fullpath, "%s/%s", root, path);
} else
fullpath = (char *)root;
if (stat(fullpath, &st) == -1 || !S_ISDIR(st.st_mode))
return;
in.dnode = st.st_dev;
in.inode = st.st_ino;
/* see if we've visited already */
if (g_hash_table_lookup(visited, &in) != NULL)
return;
inew = g_malloc(sizeof(*inew));
*inew = in;
g_hash_table_insert(visited, inew, inew);
/* link in ... */
fi = folder_info_new(store, root, path);
fi->parent = parent;
fi->sibling = *fip;
*fip = fi;
if ((( ((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) || parent == NULL)) {
/* now check content for possible other directories */
dp = opendir(fullpath);
if (dp == NULL)
return;
/* Look for subdirectories to add and scan. */
while ((d = readdir(dp)) != NULL) {
/* Skip current and parent directory. */
if (strcmp(d->d_name, ".") == 0
|| strcmp(d->d_name, "..") == 0)
continue;
/* skip fully-numerical entries (i.e. mh messages) */
strtoul(d->d_name, &tmp, 10);
if (*tmp == 0)
continue;
/* otherwise, treat at potential node, and recurse, a bit more expensive than needed, but tough! */
if (path[0]) {
tmp = g_strdup_printf("%s/%s", path, d->d_name);
recursive_scan(store, &fi->child, fi, visited, root, tmp);
g_free(tmp);
} else {
recursive_scan(store, &fi->child, fi, visited, root, d->d_name);
}
}
closedir(dp);
}
}
/* scan a .folders file */
static void
folders_scan(CamelStore *store, const char *root, const char *top, CamelFolderInfo **fip)
{
CamelFolderInfo *fi;
char line[512], *path, *tmp;
CamelStream *stream, *in;
struct stat st;
GPtrArray *folders;
GHashTable *visited;
int len;
tmp = alloca(strlen(root)+16);
sprintf(tmp, "%s/.folders", root);
stream = camel_stream_fs_new_with_name(tmp, 0, O_RDONLY);
if (stream == NULL)
return;
in = camel_stream_buffer_new(stream, CAMEL_STREAM_BUFFER_READ);
camel_object_unref(stream);
if (in == NULL)
return;
visited = g_hash_table_new(g_str_hash, g_str_equal);
folders = g_ptr_array_new();
while ( (len = camel_stream_buffer_gets((CamelStreamBuffer *)in, line, sizeof(line))) > 0) {
/* ignore blank lines */
if (len <= 1)
continue;
/* check for invalidly long lines, we abort evreything and fallback */
if (line[len-1] != '\n') {
int i;
for (i=0;i<folders->len;i++)
camel_folder_info_free(folders->pdata[i]);
g_ptr_array_set_size(folders, 0);
break;
}
line[len-1] = 0;
/* check for \r ? */
if (top && top[0]) {
int toplen = strlen(top);
/* check is subdir */
if (strncmp(top, line, len) != 0)
continue;
/* check is not sub-subdir if not recursive */
if (( ((CamelMhStore *)store)->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) == 0
&& (tmp = strrchr(line, '/'))
&& tmp > line+toplen)
continue;
}
if (g_hash_table_lookup(visited, line) != NULL)
continue;
tmp = g_strdup(line);
g_hash_table_insert(visited, tmp, tmp);
path = g_strdup_printf("%s/%s", root, line);
if (stat(path, &st) == 0 && S_ISDIR(st.st_mode)) {
fi = folder_info_new(store, root, line);
g_ptr_array_add(folders, fi);
}
g_free(path);
}
if (folders->len)
*fip = camel_folder_info_build(folders, NULL, '/', TRUE);
g_ptr_array_free(folders, TRUE);
g_hash_table_foreach(visited, (GHFunc)g_free, NULL);
g_hash_table_destroy(visited);
camel_object_unref(in);
}
/* FIXME: move to camel-local, this is shared with maildir code */
static guint inode_hash(const void *d)
{
const struct _inode *v = d;
return v->inode ^ v->dnode;
}
static gboolean inode_equal(const void *a, const void *b)
{
const struct _inode *v1 = a, *v2 = b;
return v1->inode == v2->inode && v1->dnode == v2->dnode;
}
static void inode_free(void *k, void *v, void *d)
{
g_free(k);
}
static CamelFolderInfo *
get_folder_info (CamelStore *store, const char *top, guint32 flags, CamelException *ex)
{
CamelFolderInfo *fi = NULL;
char *root;
root = ((CamelService *)store)->url->path;
/* use .folders if we are supposed to */
if (((CamelMhStore *)store)->flags & CAMEL_MH_DOTFOLDERS) {
folders_scan(store, root, top, &fi);
} else {
GHashTable *visited = g_hash_table_new(inode_hash, inode_equal);
if (top == NULL)
top = "";
recursive_scan(store, &fi, NULL, visited, root, top);
/* if we actually scanned from root, we have a "" root node we dont want */
if (fi != NULL && top[0] == 0) {
CamelFolderInfo *rfi;
rfi = fi;
fi = rfi->child;
rfi->child = NULL;
camel_folder_info_free(rfi);
}
g_hash_table_foreach(visited, inode_free, NULL);
g_hash_table_destroy(visited);
}
return fi;
}
