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* Use MAN? macros. CATEGORIES+= -> CATEGORIES.asami1996-11-181-14/+10
* Check NOMANCOMPRESS, and convert a shell for loop into a make .for loopasami1996-03-211-10/+14
* Expand subdirectory (lib/lmbench).asami1996-02-011-1/+60
* Fix a couple of relative paths.asami1996-02-011-3/+3
* Category renaming to match the directory names ("benchmarking"asami1995-11-221-2/+2
* Shorten one-line comments. Boy, I'm listed as MAINTAINERs in aasami1995-11-091-1/+1
* Change categories to reflect their new homes.asami1995-07-131-2/+2
* Package files.asami1995-05-143-0/+35
* The Makefile that has three targets, "results", "rerun" and "see", getsasami1995-05-141-0/+15
* Make this thing install. Basically copy everything it needs toasami1995-05-141-2/+22
* A package to measure & compare system performance.asami1995-05-063-0/+35
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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* camel-store.c : Abstract class for an email store */

/* 
 *
 * Authors:
 *  Bertrand Guiheneuf <bertrand@helixcode.com>
 *  Dan Winship <danw@helixcode.com>
 *
 * Copyright 1999, 2000 Helix Code, Inc. (http://www.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 <string.h>

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

static CamelServiceClass *parent_class = NULL;

/* Returns the class for a CamelStore */
#define CS_CLASS(so) CAMEL_STORE_CLASS (CAMEL_OBJECT_GET_CLASS(so))

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 char *get_root_folder_name (CamelStore *store, CamelException *ex);
static char *get_default_folder_name (CamelStore *store, CamelException *ex);

static CamelFolderInfo *get_folder_info (CamelStore *store, const char *top,
                     gboolean fast, gboolean recursive,
                     gboolean subscribed_only,
                     CamelException *ex);
static void free_folder_info (CamelStore *store, CamelFolderInfo *tree);

static CamelFolder *lookup_folder (CamelStore *store, const char *folder_name);
static void cache_folder (CamelStore *store, const char *folder_name,
              CamelFolder *folder);
static void uncache_folder (CamelStore *store, CamelFolder *folder);

static gboolean folder_subscribed (CamelStore *store, const char *folder_name);
static void subscribe_folder (CamelStore *store, const char *folder_name, CamelException *ex);
static void unsubscribe_folder (CamelStore *store, const char *folder_name, CamelException *ex);

static void
camel_store_class_init (CamelStoreClass *camel_store_class)
{
    parent_class = CAMEL_SERVICE_CLASS (camel_type_get_global_classfuncs (camel_service_get_type ()));

    /* virtual method definition */
    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_root_folder_name = get_root_folder_name;
    camel_store_class->get_default_folder_name = get_default_folder_name;
    camel_store_class->get_folder_info = get_folder_info;
    camel_store_class->free_folder_info = free_folder_info;
    camel_store_class->lookup_folder = lookup_folder;
    camel_store_class->cache_folder = cache_folder;
    camel_store_class->uncache_folder = uncache_folder;
    camel_store_class->folder_subscribed = folder_subscribed;
    camel_store_class->subscribe_folder = subscribe_folder;
    camel_store_class->unsubscribe_folder = unsubscribe_folder;
}

static void
camel_store_init (void *o, void *k)
{
    CamelStore *store = o;

    store->folders = g_hash_table_new (g_str_hash, g_str_equal);
    store->flags = 0;
}

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

    if (store->folders) {
        if (g_hash_table_size (store->folders) != 0) {
            g_warning ("Folder cache for store %p contains "
                   "%d folders at destruction.", store,
                   g_hash_table_size (store->folders));
        }
        g_hash_table_destroy (store->folders);
    }
}


CamelType
camel_store_get_type (void)
{
    static CamelType camel_store_type = CAMEL_INVALID_TYPE;

    if (camel_store_type == CAMEL_INVALID_TYPE) {
        camel_store_type = camel_type_register (CAMEL_SERVICE_TYPE, "CamelStore",
                            sizeof (CamelStore),
                            sizeof (CamelStoreClass),
                            (CamelObjectClassInitFunc) camel_store_class_init,
                            NULL,
                            (CamelObjectInitFunc) camel_store_init,
                            (CamelObjectFinalizeFunc) camel_store_finalize );
    }

    return camel_store_type;
}


static CamelFolder *
get_folder(CamelStore *store, const char *folder_name, guint32 flags, CamelException *ex)
{
    g_warning("CamelStore::get_folder not implemented for `%s'",
          camel_type_to_name(CAMEL_OBJECT_GET_TYPE(store)));
    return NULL;
}

static void
delete_folder (CamelStore *store, const char *folder_name, CamelException *ex)
{
    g_warning ("CamelStore::delete_folder not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
}

static void rename_folder (CamelStore *store, const char *old_name,
               const char *new_name, CamelException *ex)
{
    g_warning ("CamelStore::rename_folder not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
    camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM,
                 "rename folder unimplemented for: %s",
                 camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
}


/* CamelStore::get_folder_name should:
 * a) make sure that the provided name is valid
 * b) return it in canonical form, in allocated memory.
 *
 * This is used to make sure that duplicate names for the same folder
 * don't result in duplicate cache entries.
 */
static char *
get_folder_name (CamelStore *store, const char *folder_name,
         CamelException *ex)
{
    g_warning ("CamelStore::get_folder_name not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
    return NULL;
}

static char *
get_root_folder_name (CamelStore *store, CamelException *ex)
{
    return g_strdup ("/");
}

static char *
get_default_folder_name (CamelStore *store, CamelException *ex)
{
    return CS_CLASS (store)->get_root_folder_name (store, ex);
}

static CamelFolder *
lookup_folder (CamelStore *store, const char *folder_name)
{
    if (store->folders) {
        CamelFolder *folder = g_hash_table_lookup (store->folders, folder_name);
        if (folder)
            camel_object_ref(CAMEL_OBJECT(folder));
        return folder;
    }
    return NULL;
}

static void folder_finalize (CamelObject *folder, gpointer event_data, gpointer user_data)
{
    CS_CLASS (user_data)->uncache_folder (CAMEL_STORE(user_data), CAMEL_FOLDER(folder));
}

static void
cache_folder (CamelStore *store, const char *folder_name, CamelFolder *folder)
{
    if (!store->folders)
        return;

    if (g_hash_table_lookup (store->folders, folder_name)) {
        g_warning ("Caching folder %s that already exists.",
               folder_name);
    }
    g_hash_table_insert (store->folders, g_strdup (folder_name), folder);

    camel_object_hook_event (CAMEL_OBJECT (folder), "finalize", folder_finalize, store);

    /*
     * gt_k so as not to get caught by my little gt_k cleanliness detector.
     *
     * gt_k_signal_connect_object (CAMEL_OBJECT (folder), "destroy",
     *             GT_K_SIGNAL_FUNC (CS_CLASS (store)->uncache_folder),
     *             CAMEL_OBJECT (store));
     */
}

static gboolean
folder_matches (gpointer key, gpointer value, gpointer user_data)
{
    if (value == user_data) {
        g_free (key);
        return TRUE;
    } else
        return FALSE;
}

static void
uncache_folder (CamelStore *store, CamelFolder *folder)
{
    g_hash_table_foreach_remove (store->folders, folder_matches, folder);
}


static CamelFolder *
get_folder_internal(CamelStore *store, const char *folder_name, guint32 flags, CamelException *ex)
{
    CamelFolder *folder = NULL;

    /* Try cache first. */
    folder = CS_CLASS(store)->lookup_folder(store, folder_name);

    if (!folder) {
        folder = CS_CLASS(store)->get_folder(store, folder_name, flags, ex);
        if (!folder)
            return NULL;

        CS_CLASS(store)->cache_folder(store, folder_name, folder);
    }

    return folder;
}



/** 
 * camel_store_get_folder: Return the folder corresponding to a path.
 * @store: a CamelStore
 * @folder_name: name of the folder to get
 * @create: whether or not to create the folder if it doesn't already exist
 * @ex: a CamelException
 * 
 * Returns the folder corresponding to the path @folder_name. If the
 * path begins with the separator character, it is relative to the
 * root folder. Otherwise, it is relative to the default folder. If
 * @create is %TRUE and the named folder does not already exist, it will
 * be created.
 *
 * Return value: the folder
 **/
CamelFolder *
camel_store_get_folder(CamelStore *store, const char *folder_name, guint32 flags, CamelException *ex)
{
    char *name;
    CamelFolder *folder = NULL;

    name = CS_CLASS(store)->get_folder_name(store, folder_name, ex);
    if (name) {
        folder = get_folder_internal(store, name, flags, ex);
        g_free (name);
    }
    return folder;
}


/** 
 * camel_store_delete_folder: Delete the folder corresponding to a path.
 * @store: a CamelStore
 * @folder_name: name of the folder to delete
 * @ex: a CamelException
 * 
 * Deletes the named folder. The folder must be empty.
 **/
void
camel_store_delete_folder (CamelStore *store, const char *folder_name,
               CamelException *ex)
{
    char *name;

    name = CS_CLASS (store)->get_folder_name (store, folder_name, ex);
    if (name) {
        CS_CLASS (store)->delete_folder (store, name, ex);
        g_free (name);
    }
}

/**
 * camel_store_rename_folder:
 * @store: 
 * @old_name: 
 * @new_name: 
 * @ex: 
 * 
 * Rename a named folder to a new name.
 **/
void             camel_store_rename_folder      (CamelStore *store,
                         const char *old_name,
                         const char *new_name,
                         CamelException *ex)
{
    char *old, *new;

    old = CS_CLASS (store)->get_folder_name(store, old_name, ex);
    if (old) {
        new = CS_CLASS (store)->get_folder_name(store, new_name, ex);
        if (new) {
            CS_CLASS (store)->rename_folder(store, old, new, ex);
            g_free(new);
        }
        g_free(old);
    }
}


/**
 * camel_store_get_root_folder: return the top-level folder
 * 
 * Returns the folder which is at the top of the folder hierarchy.
 * This folder may or may not be the same as the default folder.
 * 
 * Return value: the top-level folder.
 **/
CamelFolder *
camel_store_get_root_folder (CamelStore *store, CamelException *ex)
{
    char *name;
    CamelFolder *folder = NULL;

    name = CS_CLASS (store)->get_root_folder_name (store, ex);
    if (name) {
        folder = get_folder_internal (store, name, TRUE, ex);
        g_free (name);
    }
    return folder;
}

/** 
 * camel_store_get_default_folder: return the store default folder
 *
 * The default folder is the folder which is presented to the user in
 * the default configuration. This defaults to the root folder if
 * the store doesn't override it.
 *
 * Return value: the default folder.
 **/
CamelFolder *
camel_store_get_default_folder (CamelStore *store, CamelException *ex)
{
    char *name;
    CamelFolder *folder = NULL;

    name = CS_CLASS (store)->get_default_folder_name (store, ex);
    if (name) {
        folder = get_folder_internal (store, name, TRUE, ex);
        g_free (name);
    }
    return folder;
}


static CamelFolderInfo *
get_folder_info (CamelStore *store, const char *top,
         gboolean fast, gboolean recursive,
         gboolean subscribed_only,
         CamelException *ex)
{
    g_warning ("CamelStore::get_folder_info not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
    return NULL;
}

/**
 * camel_store_get_folder_info:
 * @store: a CamelStore
 * @top: the name of the folder to start from
 * @fast: whether or not to do a "fast" scan.
 * @recursive: whether to include information for subfolders
 * @ex: a CamelException
 *
 * This fetches information about the folder structure of @store,
 * starting with @top, and returns a tree of CamelFolderInfo
 * structures. If @fast is %TRUE, the message_count or
 * unread_message_count fields of some or all of the structures may be
 * set to -1, if the store cannot determine that information quickly.
 * If @recursive is %TRUE, the returned tree will include all levels of
 * hierarchy below @top. If it is %FALSE, it will only include the
 * immediate subfolders of @top.
 *
 * Return value: a CamelFolderInfo tree, which must be freed with
 * camel_store_free_folder_info.
 **/
CamelFolderInfo *
camel_store_get_folder_info (CamelStore *store, const char *top,
                 gboolean fast, gboolean recursive,
                 gboolean subscribed_only,
                 CamelException *ex)
{
    g_return_val_if_fail (CAMEL_IS_STORE (store), NULL);

    return CS_CLASS (store)->get_folder_info (store, top, fast,
                          recursive, subscribed_only,
                          ex);
}


static void
free_folder_info (CamelStore *store, CamelFolderInfo *fi)
{
    g_warning ("CamelStore::free_folder_info not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
}

/**
 * camel_store_free_folder_info:
 * @store: a CamelStore
 * @tree: the tree returned by camel_store_get_folder_info()
 *
 * Frees the data returned by camel_store_get_folder_info().
 **/
void
camel_store_free_folder_info (CamelStore *store, CamelFolderInfo *fi)
{
    g_return_if_fail (CAMEL_IS_STORE (store));

    CS_CLASS (store)->free_folder_info (store, fi);
}

/**
 * camel_store_free_folder_info_full:
 * @store: a CamelStore
 * @tree: the tree returned by camel_store_get_folder_info()
 *
 * An implementation for CamelStore::free_folder_info. Frees all
 * of the data.
 **/
void
camel_store_free_folder_info_full (CamelStore *store, CamelFolderInfo *fi)
{
    camel_folder_info_free (fi);
}

/**
 * camel_store_free_folder_info_nop:
 * @store: a CamelStore
 * @tree: the tree returned by camel_store_get_folder_info()
 *
 * An implementation for CamelStore::free_folder_info. Does nothing.
 **/
void
camel_store_free_folder_info_nop (CamelStore *store, CamelFolderInfo *fi)
{
    ;
}


/**
 * camel_folder_info_free:
 * @fi: the CamelFolderInfo
 *
 * Frees @fi.
 **/
void
camel_folder_info_free (CamelFolderInfo *fi)
{
    if (fi) {
        camel_folder_info_free (fi->sibling);
        camel_folder_info_free (fi->child);
        g_free (fi->name);
        g_free (fi->full_name);
        g_free (fi->url);
        g_free (fi);
    }
}


/**
 * camel_folder_info_build:
 * @folders: an array of CamelFolderInfo
 * @top: the top of the folder tree
 * @separator: the hieararchy separator character
 * @short_names: %TRUE if the (short) name of a folder is the part after
 * the last @separator in the full name. %FALSE if it is the full name.
 *
 * This takes an array of folders and attaches them together. @top points
 * to the (or at least, "a") top-level element of the tree: it may or may
 * not also be an element of @folders. If necessary, camel_folder_info_build
 * will create additional CamelFolderInfo with %NULL urls to fill in gaps
 * in the tree. The value of @short_names is used in constructing the
 * names of these intermediate folders.
 **/
void
camel_folder_info_build (GPtrArray *folders, CamelFolderInfo *top,
             char separator, gboolean short_names)
{
    CamelFolderInfo *fi, *pfi;
    GHashTable *hash;
    char *p, *pname;
    int i;

    /* Hash the folders. */
    hash = g_hash_table_new (g_str_hash, g_str_equal);
    for (i = 0; i < folders->len; i++) {
        fi = folders->pdata[i];
        g_hash_table_insert (hash, fi->full_name, fi);
    }

    /* Now find parents. */
    for (i = 0; i < folders->len; i++) {
        fi = folders->pdata[i];
        if (fi == top)
            continue;

        p = strrchr (fi->full_name, separator);
        if (p) {
            pname = g_strndup (fi->full_name, p - fi->full_name);
            pfi = g_hash_table_lookup (hash, pname);
            if (pfi) {
                g_free (pname);
            } else {
                pfi = g_new0 (CamelFolderInfo, 1);
                pfi->full_name = pname;
                if (short_names) {
                    pfi->name = strrchr (pname, separator);
                    if (pfi->name)
                        pfi->name = g_strdup (pfi->name + 1);
                    else
                        pfi->name = g_strdup (pname);
                } else
                    pfi->name = g_strdup (pname);
                g_hash_table_insert (hash, pname, pfi);
                g_ptr_array_add (folders, pfi);
            }
            fi->sibling = pfi->child;
            pfi->child = fi;
        } else {
            fi->sibling = top->child;
            top->child = fi;
        }
    }
}

gboolean
camel_store_supports_subscriptions (CamelStore *store)
{
    return (store->flags & CAMEL_STORE_SUBSCRIPTIONS);
}


static gboolean
folder_subscribed (CamelStore *store, const char *folder_name)
{
    g_warning ("CamelStore::folder_subscribed not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
    return FALSE;
}

/**
 * camel_store_folder_subscribed: Tell whether or not a folder has been subscribed to.
 * @store: a CamelStore
 * @folder_name: the folder on which we're querying subscribed status.
 * Return value: TRUE if folder is subscribed, FALSE if not.
 **/
gboolean
camel_store_folder_subscribed (CamelStore *store,
                   const char *folder_name)
{
    g_return_val_if_fail (CAMEL_IS_STORE (store), FALSE);

    return CS_CLASS (store)->folder_subscribed (store, folder_name);
}

static void
subscribe_folder (CamelStore *store, const char *folder_name, CamelException *ex)
{
    g_warning ("CamelStore::subscribe_folder not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
}

/**
 * camel_store_subscribe_folder: marks a folder as subscribed.
 * @store: a CamelStore
 * @folder_name: the folder to subscribe to.
 **/
void
camel_store_subscribe_folder (CamelStore *store,
                  const char *folder_name,
                  CamelException *ex)
{
    g_return_if_fail (CAMEL_IS_STORE (store));

    CS_CLASS (store)->subscribe_folder (store, folder_name, ex);
}

static void
unsubscribe_folder (CamelStore *store, const char *folder_name, CamelException *ex)
{
    g_warning ("CamelStore::unsubscribe_folder not implemented for `%s'",
           camel_type_to_name (CAMEL_OBJECT_GET_TYPE (store)));
}


/**
 * camel_store_unsubscribe_folder: marks a folder as unsubscribed.
 * @store: a CamelStore
 * @folder_name: the folder to unsubscribe from.
 **/
void
camel_store_unsubscribe_folder (CamelStore *store,
                const char *folder_name,
                CamelException *ex)
{
    g_return_if_fail (CAMEL_IS_STORE (store));

    CS_CLASS (store)->unsubscribe_folder (store, folder_name, ex);
}
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