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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-mbox-store.c : class for an mbox store */

/* 
 *
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Authors: Michael Zucchi <notzed@helixcode.com>
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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
 */

#include <config.h>

#include <sys/stat.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>

#include "camel-mh-store.h"
#include "camel-mh-folder.h"
#include "camel-exception.h"
#include "camel-url.h"

/* 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 char *get_name(CamelService * service, gboolean brief);
static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex);
static void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex);
static void rename_folder(CamelStore *store, const char *old_name, const char *new_name, CamelException *ex);
static char *get_folder_name(CamelStore * store, const char *folder_name, CamelException * ex);
static CamelFolderInfo *get_folder_info (CamelStore *store, const char *top,
                     gboolean fast, gboolean recursive,
                     gboolean subscribed_only,
                     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);

    /* virtual method overload */
    camel_service_class->get_name = get_name;

    camel_store_class->get_folder = get_folder;
    camel_store_class->delete_folder = delete_folder;
    camel_store_class->rename_folder = rename_folder;
    camel_store_class->get_folder_name = get_folder_name;
    camel_store_class->get_folder_info = get_folder_info;
    camel_store_class->free_folder_info = camel_store_free_folder_info_full;
}

static void camel_mh_store_init(CamelObject * object)
{
    CamelStore *store = CAMEL_STORE(object);

    /* mh names are filenames, so they are case-sensitive. */
    store->folders = g_hash_table_new(g_str_hash, g_str_equal);
}

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_STORE_TYPE, "CamelMhStore",
                              sizeof(CamelMhStore),
                              sizeof(CamelMhStoreClass),
                              (CamelObjectClassInitFunc) camel_mh_store_class_init,
                              NULL,
                              (CamelObjectInitFunc) camel_mh_store_init,
                              NULL);
    }

    return camel_mh_store_type;
}

const gchar *camel_mh_store_get_toplevel_dir(CamelMhStore * store)
{
    CamelURL *url = CAMEL_SERVICE(store)->url;

    g_assert(url != NULL);
    return url->path;
}

static CamelFolder *get_folder(CamelStore * store, const char *folder_name, guint32 flags, CamelException * ex)
{
    char *name;
    struct stat st;

    name = g_strdup_printf("%s%s", CAMEL_SERVICE(store)->url->path, 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;
        }
        printf("creating ...\n");

        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;
        }
        printf("created ok?\n");

    } 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 void delete_folder(CamelStore * store, const char *folder_name, CamelException * ex)
{
    char *name;
    struct stat st;
    char *str;

    name = g_strdup_printf("%s%s", CAMEL_SERVICE(store)->url->path, folder_name);
    if (stat(name, &st) == -1) {
        if (errno != ENOENT)
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                         _("Could not delete folder `%s': %s"),
                         folder_name, strerror(errno));
    } else {
        /* this will 'fail' if there are still messages in the directory -
           but only the metadata is lost */
        str = g_strdup_printf("%s/ev-summary", name);
        unlink(str);
        g_free(str);
        str = g_strdup_printf("%s/ev-index.ibex", name);
        unlink(str);
        g_free(str);
        if (rmdir(name) == -1) {
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                         _("Could not delete folder `%s': %s"),
                         folder_name, strerror(errno));
        }
    }
    g_free(name);
}

static void rename_folder (CamelStore *store, const char *old_name, const char *new_name, CamelException *ex)
{
    char *old, *new;
    struct stat st;

    old = g_strdup_printf("%s%s", CAMEL_SERVICE(store)->url->path, old_name);
    new = g_strdup_printf("%s%s", CAMEL_SERVICE(store)->url->path, new_name);
    if (stat(new, &st) == -1 && errno == ENOENT) {
        if (stat(old, &st) == 0 && S_ISDIR(st.st_mode)) {
            if (rename(old, new) != 0) {
                camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                             _("Could not rename folder `%s': %s"), old_name, strerror(errno));
            }
        } else {
            camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                         _("Could not rename folder `%s': %s"), old_name, strerror(errno));
        }
    } else {
        camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                     _("Could not rename folder `%s': %s exists"), old_name, new_name);
    }
}

static char *get_folder_name(CamelStore * store, const char *folder_name, CamelException * ex)
{
    /* For now, we don't allow hieararchy. FIXME. */
    if (strchr(folder_name + 1, '/')) {
        camel_exception_set(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER, _("MH folders may not be nested."));
        return NULL;
    }

    return *folder_name == '/' ? g_strdup(folder_name) : g_strdup_printf("/%s", folder_name);
}

static char *get_name(CamelService * service, gboolean brief)
{
    if (brief)
        return g_strdup(service->url->path);
    else
        return g_strdup_printf(_("Local mail directory %s"), service->url->path);
}


static CamelFolderInfo *
get_folder_info (CamelStore *store, const char *top,
         gboolean fast, gboolean recursive,
         gboolean subscribed_only,
         CamelException *ex)
{
    /* FIXME: This is broken, but it corresponds to what was
     * there before.
     */
    return NULL;
}