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/*
 *  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 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 "camel-exception.h"
#include "camel-vee-store.h"
#include "camel-vee-folder.h"

#include "camel-private.h"

#include <string.h>

static CamelFolder *vee_get_folder (CamelStore *store, const char *folder_name, guint32 flags, CamelException *ex);
static void vee_delete_folder(CamelStore *store, const char *folder_name, CamelException *ex);
static void vee_rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex);
static void vee_init_trash (CamelStore *store);
static CamelFolder *vee_get_trash  (CamelStore *store, CamelException *ex);

static CamelFolderInfo *vee_get_folder_info(CamelStore *store, const char *top, guint32 flags, CamelException *ex);

struct _CamelVeeStorePrivate {
    CamelFolderInfo *folder_info;
};

#define _PRIVATE(o) (((CamelVeeStore *)(o))->priv)

static void camel_vee_store_class_init (CamelVeeStoreClass *klass);
static void camel_vee_store_init       (CamelVeeStore *obj);
static void camel_vee_store_finalise   (CamelObject *obj);

static CamelStoreClass *camel_vee_store_parent;

CamelType
camel_vee_store_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register (camel_store_get_type (), "CamelVeeStore",
                        sizeof (CamelVeeStore),
                        sizeof (CamelVeeStoreClass),
                        (CamelObjectClassInitFunc) camel_vee_store_class_init,
                        NULL,
                        (CamelObjectInitFunc) camel_vee_store_init,
                        (CamelObjectFinalizeFunc) camel_vee_store_finalise);
    }
    
    return type;
}

static void
camel_vee_store_class_init (CamelVeeStoreClass *klass)
{
    CamelStoreClass *store_class = (CamelStoreClass *) klass;
    
    camel_vee_store_parent = CAMEL_STORE_CLASS(camel_type_get_global_classfuncs (camel_store_get_type ()));

    /* virtual method overload */
    store_class->get_folder = vee_get_folder;
    store_class->rename_folder = vee_rename_folder;
    store_class->delete_folder = vee_delete_folder;
    store_class->get_folder_info = vee_get_folder_info;
    store_class->free_folder_info = camel_store_free_folder_info_full;

    store_class->init_trash = vee_init_trash;
    store_class->get_trash = vee_get_trash;
}

static void
camel_vee_store_init (CamelVeeStore *obj)
{
    struct _CamelVeeStorePrivate *p;
    CamelStore *store = (CamelStore *)obj;

    /* we dont want a vtrash on this one */
    store->flags &= ~(CAMEL_STORE_VTRASH);  

    p = _PRIVATE(obj) = g_malloc0(sizeof(*p));
}

static void
camel_vee_store_finalise (CamelObject *obj)
{
    CamelVeeStore *vs = (CamelVeeStore *)obj;

    g_free(vs->priv);
}

/**
 * camel_vee_store_new:
 *
 * Create a new CamelVeeStore object.
 * 
 * Return value: A new CamelVeeStore widget.
 **/
CamelVeeStore *
camel_vee_store_new (void)
{
    CamelVeeStore *new = CAMEL_VEE_STORE(camel_object_new(camel_vee_store_get_type ()));
    return new;
}

static CamelFolder *
vee_get_folder (CamelStore *store, const char *folder_name, guint32 flags, CamelException *ex)
{
    CamelFolderInfo *fi;
    CamelVeeFolder *vf;
    char *name;

    vf = (CamelVeeFolder *)camel_vee_folder_new(store, folder_name, flags);
    if ((vf->flags & CAMEL_STORE_FOLDER_PRIVATE) == 0) {
        fi = g_malloc0(sizeof(*fi));
        fi->full_name = g_strdup(vf->vname);
        name = strrchr(vf->vname, '/');
        if (name == NULL)
            name = vf->vname;
        fi->name = g_strdup(name);
        fi->url = g_strdup_printf("vfolder:%s#%s", ((CamelService *)store)->url->path,
                      ((CamelFolder *)vf)->full_name);
        fi->unread_message_count = camel_folder_get_message_count((CamelFolder *)vf);
        camel_folder_info_build_path(fi, '/');
        camel_object_trigger_event(CAMEL_OBJECT(store), "folder_created", fi);
        camel_folder_info_free(fi);
    }

    return (CamelFolder *)vf;
}

static void
vee_init_trash (CamelStore *store)
{
    /* no-op */
    ;
}

static CamelFolder *
vee_get_trash (CamelStore *store, CamelException *ex)
{
    return NULL;
}

struct _build_info {
    const char *top;
    guint32 flags;
    GPtrArray *infos;
    GPtrArray *folders;
};

static void
build_info(char *name, CamelVeeFolder *folder, struct _build_info *data)
{
    CamelFolderInfo *info;

    /* check we have to include this one */
    if (data->top) {
        if (data->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) {
            if (strncmp(name, data->top, strlen(data->top) != 0))
                return;
        } else {
            if (strcmp(name, data->top))
                return;
        }
    } else {
        if ((data->flags & CAMEL_STORE_FOLDER_INFO_RECURSIVE) == 0) {
            if (strchr(name, '/'))
                return;
        }
    }

    info = g_malloc0(sizeof(*info));
    info->url = g_strdup_printf("vfolder:%s#%s", ((CamelService *)((CamelFolder *)folder)->parent_store)->url->path,
                    ((CamelFolder *)folder)->full_name);
    info->full_name = g_strdup(((CamelFolder *)folder)->full_name);
    info->name = g_strdup(((CamelFolder *)folder)->name);
    info->unread_message_count = -1;
    g_ptr_array_add(data->infos, info);
    camel_object_ref((CamelObject *)folder);
    g_ptr_array_add(data->folders, folder);
}

static CamelFolderInfo *
vee_get_folder_info(CamelStore *store, const char *top, guint32 flags, CamelException *ex)
{
    struct _build_info data;
    CamelFolderInfo *info;
    int i;

    /* first, build the info list */
    data.top = top;
    data.flags = flags;
    data.infos = g_ptr_array_new();
    data.folders = g_ptr_array_new();
    CAMEL_STORE_LOCK(store, cache_lock);
    g_hash_table_foreach(store->folders, (GHFunc)build_info, &data);
    CAMEL_STORE_UNLOCK(store, cache_lock);

    /* then make sure the unread counts are accurate */
    for (i=0;i<data.infos->len;i++) {
        CamelFolderInfo *info = data.infos->pdata[i];
        CamelFolder *folder = data.folders->pdata[i];

        camel_folder_refresh_info(folder, NULL);
        info->unread_message_count = camel_folder_get_unread_message_count(folder);
        camel_object_unref((CamelObject *)folder);
    }
    g_ptr_array_free(data.folders, TRUE);

    /* and always add UNMATCHED, if scanning from top/etc */
    if (top == NULL || top[0] == 0 || strncmp(top, CAMEL_UNMATCHED_NAME, strlen(CAMEL_UNMATCHED_NAME)) == 0) {
        info = g_malloc0(sizeof(*info));
        info->url = g_strdup_printf("vfolder:%s#%s", ((CamelService *)store)->url->path, CAMEL_UNMATCHED_NAME);
        info->full_name = g_strdup(CAMEL_UNMATCHED_NAME);
        info->name = g_strdup(CAMEL_UNMATCHED_NAME);
        info->unread_message_count = -1;
        camel_folder_info_build_path(info, '/');
        g_ptr_array_add(data.infos, info);
    }
        
    /* convert it into a tree */
    info = camel_folder_info_build(data.infos, (top&&top[0])?top:"", '/', TRUE);
    g_ptr_array_free(data.infos, TRUE);

    return info;
}

static void
vee_delete_folder(CamelStore *store, const char *folder_name, CamelException *ex)
{
    CamelFolder *folder;
    char *key;

    if (strcmp(folder_name, CAMEL_UNMATCHED_NAME) == 0) {
        camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
                     _("Cannot delete folder: %s: Invalid operation"), folder_name);
        return;
    }

    CAMEL_STORE_LOCK(store, cache_lock);
    if (g_hash_table_lookup_extended(store->folders, folder_name, (void **)&key, (void **)&folder)) {
        int update;

        update = (((CamelVeeFolder *)folder)->flags & CAMEL_STORE_FOLDER_PRIVATE) == 0;
        g_hash_table_remove(store->folders, key);
        CAMEL_STORE_UNLOCK(store, cache_lock);
        if (store->vtrash)
            camel_vee_folder_remove_folder((CamelVeeFolder *)store->vtrash, folder);

        /* FIXME: deleted event shoudl just pass out the folder name, not all this shit?? */
        if (update) {
            CamelFolderInfo *fi = g_malloc0(sizeof(*fi));

            fi->full_name = g_strdup(key);
            fi->name = strrchr(key, '/');
            if (fi->name == NULL)
                fi->name = g_strdup(key);
            else
                fi->name = g_strdup(fi->name);
            fi->url = g_strdup_printf("vfolder:%s#%s", ((CamelService *)store)->url->path, key);
            fi->unread_message_count = -1;
            camel_folder_info_build_path(fi, '/');
    
            camel_object_trigger_event(CAMEL_OBJECT(store), "folder_deleted", fi);
            camel_folder_info_free(fi);
        }
        g_free(key);
    } else {
        CAMEL_STORE_UNLOCK(store, cache_lock);

        camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
                     _("Cannot delete folder: %s: No such folder"), folder_name);
    }
}

static void
vee_rename_folder(CamelStore *store, const char *old, const char *new, CamelException *ex)
{
    CamelFolder *folder;
    char *key, *oldname, *full_oldname;

    if (strcmp(old, CAMEL_UNMATCHED_NAME) == 0) {
        camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
                     _("Cannot rename folder: %s: Invalid operation"), old);
        return;
    }

    CAMEL_STORE_LOCK(store, cache_lock);
    if (g_hash_table_lookup_extended(store->folders, old, (void **)&key, (void **)&folder)) {
        g_hash_table_remove(store->folders, key);
        g_free(key);

        /* this should really be atomic */
        oldname = folder->name;
        full_oldname = folder->full_name;
        key = folder->name;
        folder->full_name = g_strdup(new);
        key = strrchr(new, '/');
        key = key?key+1:(char *)new;
        folder->name = g_strdup(key);
        g_hash_table_insert(store->folders, g_strdup(new), folder);

        g_free(oldname);
        g_free(full_oldname);
        CAMEL_STORE_UNLOCK(store, cache_lock);

        
    } else {
        CAMEL_STORE_UNLOCK(store, cache_lock);

        camel_exception_setv(ex, CAMEL_EXCEPTION_STORE_NO_FOLDER,
                     _("Cannot rename folder: %s: No such folder"), new);
    }
}