path: root/camel/providers/vee/camel-vee-folder.c

/*
 *  Copyright (C) 2000 Helix Code Inc.
 *
 *  Authors: Michael Zucchi <notzed@helixcode.com>
 *           Jeffrey Stedfast <fejj@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 "camel-exception.h"
#include "camel-vee-folder.h"
#include "camel-folder-summary.h"
#include "camel-mime-message.h"

#include <string.h>

/* our message info includes the parent folder */
typedef struct _CamelVeeMessageInfo {
    CamelMessageInfo info;
    CamelFolder *folder;
} CamelVeeMessageInfo;

struct _CamelVeeFolderPrivate {
    GList *folders;
};

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

static void vee_init (CamelFolder *folder, CamelStore *parent_store,
              CamelFolder *parent_folder, const gchar *name,
              gchar *separator, gboolean path_begins_with_sep,
              CamelException *ex);
static void vee_sync (CamelFolder *folder, gboolean expunge, CamelException *ex);

static GPtrArray *vee_get_uids  (CamelFolder *folder);
GPtrArray *vee_get_summary (CamelFolder *folder);

static gint vee_get_message_count (CamelFolder *folder);
static gint vee_get_unread_message_count (CamelFolder *folder);
static CamelMimeMessage *vee_get_message (CamelFolder *folder, const gchar *uid, CamelException *ex);

static const CamelMessageInfo *vee_get_message_info (CamelFolder *folder, const char *uid);
static GPtrArray *vee_search_by_expression(CamelFolder *folder, const char *expression, CamelException *ex);

static guint32 vee_get_message_flags (CamelFolder *folder, const char *uid);
static void vee_set_message_flags (CamelFolder *folder, const char *uid, guint32 flags, guint32 set);
static gboolean vee_get_message_user_flag (CamelFolder *folder, const char *uid, const char *name);
static void vee_set_message_user_flag (CamelFolder *folder, const char *uid, const char *name, gboolean value);


static void camel_vee_folder_class_init (CamelVeeFolderClass *klass);
static void camel_vee_folder_init       (CamelVeeFolder *obj);
static void camel_vee_folder_finalise   (CamelObject *obj);

static void vee_folder_build(CamelVeeFolder *vf, CamelException *ex);
static void vee_folder_build_folder(CamelVeeFolder *vf, CamelFolder *source, CamelException *ex);

static CamelFolderClass *camel_vee_folder_parent;

CamelType
camel_vee_folder_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register (camel_folder_get_type (), "CamelVeeFolder",
                        sizeof (CamelVeeFolder),
                        sizeof (CamelVeeFolderClass),
                        (CamelObjectClassInitFunc) camel_vee_folder_class_init,
                        NULL,
                        (CamelObjectInitFunc) camel_vee_folder_init,
                        (CamelObjectFinalizeFunc) camel_vee_folder_finalise);
    }
    
    return type;
}

static void
camel_vee_folder_class_init (CamelVeeFolderClass *klass)
{
    CamelFolderClass *folder_class = (CamelFolderClass *) klass;

    camel_vee_folder_parent = CAMEL_FOLDER_CLASS(camel_type_get_global_classfuncs (camel_folder_get_type ()));

    folder_class->init = vee_init;
    folder_class->sync = vee_sync;

    folder_class->get_uids = vee_get_uids;
    folder_class->free_uids = camel_folder_free_deep;
    folder_class->get_summary = vee_get_summary;
    folder_class->free_summary = camel_folder_free_nop;
    folder_class->get_message = vee_get_message;

    folder_class->get_message_info = vee_get_message_info;

    folder_class->get_message_count = vee_get_message_count;
    folder_class->get_unread_message_count = vee_get_unread_message_count;
    folder_class->search_by_expression = vee_search_by_expression;

    folder_class->get_message_flags = vee_get_message_flags;
    folder_class->set_message_flags = vee_set_message_flags;
    folder_class->get_message_user_flag = vee_get_message_user_flag;
    folder_class->set_message_user_flag = vee_set_message_user_flag;
}

static void
camel_vee_folder_init (CamelVeeFolder *obj)
{
    struct _CamelVeeFolderPrivate *p;

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

static void
camel_vee_folder_finalise (CamelObject *obj)
{
    CamelVeeFolder *vf = (CamelVeeFolder *)obj;
    struct _CamelVeeFolderPrivate *p = _PRIVATE(vf);
    GList *node;

    node = p->folders;
    while (node) {
        CamelFolder *f = node->data;
        camel_object_unref((CamelObject *)f);
        node = g_list_next(node);
    }
}

/**
 * camel_vee_folder_new:
 *
 * Create a new CamelVeeFolder object.
 * 
 * Return value: A new CamelVeeFolder widget.
 **/
CamelVeeFolder *
camel_vee_folder_new (void)
{
    CamelVeeFolder *new = CAMEL_VEE_FOLDER ( camel_object_new (camel_vee_folder_get_type ()));
    return new;
}

static void
folder_changed(CamelFolder *sub, gpointer type, CamelVeeFolder *vf)
{
    CamelException *ex;

    ex = camel_exception_new();
    vee_folder_build_folder(vf, sub, ex);
    camel_exception_free(ex);
    /* FIXME: should only raise follow-on event if the result changed */
    camel_object_trigger_event( CAMEL_OBJECT(vf), "folder_changed", GINT_TO_POINTER(0));
}

/* track flag changes in the summary */
static void
message_changed(CamelFolder *f, const char *uid, CamelVeeFolder *mf)
{
    const CamelMessageInfo *info;
    CamelMessageInfo *vinfo;
    CamelFlag *flag;
    char *vuid;

    info = camel_folder_get_message_info(f, uid);

    vuid = g_strdup_printf("%p:%s", f, uid);
    vinfo = (CamelMessageInfo *)vee_get_message_info((CamelFolder *)mf, vuid);
    if (info && vinfo) {
        vinfo->flags = info->flags;
        camel_flag_list_free(&vinfo->user_flags);
        flag = info->user_flags;
        while (flag) {
            camel_flag_set(&vinfo->user_flags, flag->name, TRUE);
            flag = flag->next;
        }
        camel_object_trigger_event( CAMEL_OBJECT(mf), "message_changed", vinfo->uid);
    }
    g_free(vuid);
}

void
camel_vee_folder_add_folder(CamelVeeFolder *vf, CamelFolder *sub)
{
    struct _CamelVeeFolderPrivate *p = _PRIVATE(vf);
    CamelException *ex;

    camel_object_ref((CamelObject *)sub);
    p->folders = g_list_append(p->folders, sub);

    camel_object_hook_event ((CamelObject *)sub, "folder_changed", (CamelObjectEventHookFunc) folder_changed, vf);
    camel_object_hook_event ((CamelObject *)sub, "message_changed", (CamelObjectEventHookFunc) message_changed, vf);

    ex = camel_exception_new();
    vee_folder_build_folder(vf, sub, ex);
    camel_exception_free(ex);
    /* FIXME: should only raise follow-on event if the result changed */
    camel_object_trigger_event( CAMEL_OBJECT(vf), "folder_changed", GINT_TO_POINTER(0));
}


static void vee_init (CamelFolder *folder, CamelStore *parent_store,
              CamelFolder *parent_folder, const gchar *name,
              gchar *separator, gboolean path_begins_with_sep,
              CamelException *ex)
{
    CamelVeeFolder *vf = (CamelVeeFolder *)folder;
    char *namepart, *searchpart;

    namepart = g_strdup(name);
    searchpart = strchr(namepart, '?');
    if (searchpart == NULL) {
        /* no search, no result! */
        searchpart = "(body-contains \"=some-invalid_string-sequence=xx\")";
    } else {
        *searchpart++ = 0;
    }

    camel_vee_folder_parent->init (folder, parent_store, parent_folder, name, separator, TRUE, ex);
    if (camel_exception_get_id (ex))
        return;

    folder->can_hold_messages = TRUE;
    folder->can_hold_folders = FALSE;
    folder->has_summary_capability = TRUE;
    folder->has_search_capability = TRUE;

    /* FIXME: what to do about user flags if the subfolder doesn't support them? */
    folder->permanent_flags = CAMEL_MESSAGE_ANSWERED |
        CAMEL_MESSAGE_DELETED |
        CAMEL_MESSAGE_DRAFT |
        CAMEL_MESSAGE_FLAGGED |
        CAMEL_MESSAGE_SEEN;

    vf->messages = g_ptr_array_new();
    vf->messages_uid = g_hash_table_new(g_str_hash, g_str_equal);

    vf->expression = g_strdup_printf("(or\n (match-all (user-flag \"%s\"))\n %s\n)", namepart, searchpart);
    vf->vname = g_strdup(namepart);

    g_free(namepart);

    vee_folder_build(vf, ex);
}

static void
vee_sync (CamelFolder *folder, gboolean expunge, CamelException *ex)
{
    ;
}

static gint vee_get_message_count (CamelFolder *folder)
{
    CamelVeeFolder *vf = (CamelVeeFolder *)folder;

    return vf->messages->len;
}

static gint
vee_get_unread_message_count (CamelFolder *folder)
{
    CamelVeeFolder *vee_folder = CAMEL_VEE_FOLDER (folder);
    CamelMessageInfo *info;
    GPtrArray *infolist;
    gint i, count = 0;

    g_return_val_if_fail (folder != NULL, -1);

    infolist = vee_folder->messages;
    
    for (i = 0; i < infolist->len; i++) {
        info = (CamelMessageInfo *) g_ptr_array_index (infolist, i);
        if (!(info->flags & CAMEL_MESSAGE_SEEN))
            count++;
    }
    
    return count;
}

static gboolean
get_real_message (CamelFolder *folder, const char *uid,
          CamelFolder **out_folder, const char **out_uid)
{
    CamelVeeMessageInfo *mi;

    mi = (CamelVeeMessageInfo *)vee_get_message_info(folder, uid);
    g_return_val_if_fail (mi != NULL, FALSE);

    *out_folder = mi->folder;
    *out_uid = strchr(mi->info.uid, ':')+1;
    return TRUE;
}

static CamelMimeMessage *vee_get_message (CamelFolder *folder, const gchar *uid, CamelException *ex)
{
    const char *real_uid;
    CamelFolder *real_folder;

    if (!get_real_message (folder, uid, &real_folder, &real_uid)) {
        camel_exception_setv(ex, CAMEL_EXCEPTION_FOLDER_INVALID_UID,
                     "No such message %s in %s", uid,
                     folder->name);
        return NULL;
    }

    return camel_folder_get_message (real_folder, real_uid, ex);
}

GPtrArray *vee_get_summary (CamelFolder *folder)
{
    CamelVeeFolder *vf = (CamelVeeFolder *)folder;

    return vf->messages;
}

static const CamelMessageInfo *vee_get_message_info (CamelFolder *f, const char *uid)
{
    CamelVeeFolder *vf = (CamelVeeFolder *)f;

    return g_hash_table_lookup(vf->messages_uid, uid);
}

static GPtrArray *vee_get_uids (CamelFolder *folder)
{
    GPtrArray *result;
    int i;
    CamelVeeFolder *vf = (CamelVeeFolder *)folder;

    result = g_ptr_array_new ();
    g_ptr_array_set_size (result, vf->messages->len);
    for (i=0;i<vf->messages->len;i++) {
        CamelMessageInfo *mi = g_ptr_array_index(vf->messages, i);
        result->pdata[i] = g_strdup(mi->uid);
    }

    return result;
}

static GPtrArray *
vee_search_by_expression(CamelFolder *folder, const char *expression, CamelException *ex)
{
    GList *node;
    GPtrArray *matches, *result = g_ptr_array_new ();
    char *expr;
    CamelVeeFolder *vf = (CamelVeeFolder *)folder;
    struct _CamelVeeFolderPrivate *p = _PRIVATE(vf);

    expr = g_strdup_printf("(and %s %s)", vf->expression, expression);
    node = p->folders;
    while (node) {
        CamelFolder *f = node->data;
        int i;

        matches = camel_folder_search_by_expression(f, expression, ex);
        for (i = 0; i < matches->len; i++) {
            char *uid = matches->pdata[i];
            g_ptr_array_add(result, g_strdup_printf("%p:%s", f, uid));
        }
        camel_folder_search_free(f, matches);
        node = g_list_next(node);
    }
    return result;
}

static guint32
vee_get_message_flags(CamelFolder *folder, const char *uid)
{
    const char *real_uid;
    CamelFolder *real_folder;

    if (!get_real_message (folder, uid, &real_folder, &real_uid))
        return 0;

    return camel_folder_get_message_flags(real_folder, real_uid);
}

static void
vee_set_message_flags(CamelFolder *folder, const char *uid, guint32 flags,
              guint32 set)
{
    const char *real_uid;
    CamelFolder *real_folder;

    if (!get_real_message (folder, uid, &real_folder, &real_uid))
        return;

    camel_folder_set_message_flags(real_folder, real_uid, flags, set);
}

static gboolean
vee_get_message_user_flag(CamelFolder *folder, const char *uid,
              const char *name)
{
    const char *real_uid;
    CamelFolder *real_folder;

    if (!get_real_message (folder, uid, &real_folder, &real_uid))
        return FALSE;

    return camel_folder_get_message_user_flag(real_folder, real_uid, name);
}

static void
vee_set_message_user_flag(CamelFolder *folder, const char *uid,
              const char *name, gboolean value)
{
    const char *real_uid;
    CamelFolder *real_folder;

    if (!get_real_message (folder, uid, &real_folder, &real_uid))
        return;

    return camel_folder_set_message_user_flag(real_folder, real_uid, name, value);
}


/*
  need incremental update, based on folder.
  Need to watch folders for changes and update accordingly.
*/

/* this does most of the vfolder magic */
static void
vee_folder_build(CamelVeeFolder *vf, CamelException *ex)
{
    struct _CamelVeeFolderPrivate *p = _PRIVATE(vf);
    GList *node;

    GPtrArray *messages;
    GHashTable *messages_uid;

    {
        int i;

        for (i=0;i<vf->messages->len;i++) {
            CamelMessageInfo *mi = g_ptr_array_index(vf->messages, i);
            camel_message_info_free(mi);
        }
    }

    messages = g_ptr_array_new();
    messages_uid = g_hash_table_new(g_str_hash, g_str_equal);

    node = p->folders;
    while (node) {
        GPtrArray *matches;
        CamelFolder *f = node->data;
        CamelVeeMessageInfo *mi;
        const CamelMessageInfo *info;
        int i;

        matches = camel_folder_search_by_expression(f, vf->expression, ex);
        for (i = 0; i < matches->len; i++) {
            info = camel_folder_get_message_info(f, matches->pdata[i]);
            if (info) {
                mi = g_malloc0(sizeof(*mi));
                camel_message_info_dup_to(info, (CamelMessageInfo *)mi);
                g_free (mi->info.uid);
                mi->info.uid = g_strdup_printf("%p:%s", f, info->uid);
                mi->folder = f;
                g_ptr_array_add(messages, mi);
                g_hash_table_insert(messages_uid, mi->info.uid, mi);
            }
        }
        g_ptr_array_add (matches, NULL);
        g_strfreev((char **)matches->pdata);
        g_ptr_array_free(matches, FALSE);
        node = g_list_next(node);
    }

    g_ptr_array_free(vf->messages, TRUE);
    vf->messages = messages;
    g_hash_table_destroy(vf->messages_uid);
    vf->messages_uid = messages_uid;
}


/* build query contents for a single folder */
static void
vee_folder_build_folder(CamelVeeFolder *vf, CamelFolder *source, CamelException *ex)
{
    GPtrArray *matches;
    CamelFolder *f = source;
    CamelVeeMessageInfo *mi;
    const CamelMessageInfo *info;

    GPtrArray *messages;
    GHashTable *messages_uid;
    int i;

    for (i=0;i<vf->messages->len;i++) {
        CamelVeeMessageInfo *mi = g_ptr_array_index(vf->messages, i);
        if (mi->folder == source) {
            g_hash_table_remove(vf->messages_uid, mi->info.uid);
            g_ptr_array_remove_index_fast(vf->messages, i);

            camel_message_info_free((CamelMessageInfo *)mi);
            i--;
        }
    }

    messages = vf->messages;
    messages_uid = vf->messages_uid;
    
    matches = camel_folder_search_by_expression(f, vf->expression, ex);
    for (i = 0; i < matches->len; i++) {
        info = camel_folder_get_message_info(f, matches->pdata[i]);
        if (info) {
            mi = g_malloc0(sizeof(*mi));
            camel_message_info_dup_to(info, (CamelMessageInfo*)mi);
            g_free (mi->info.uid);
            mi->info.uid = g_strdup_printf("%p:%s", f, info->uid);
            mi->folder = f;
            g_ptr_array_add(messages, mi);
            g_hash_table_insert(messages_uid, mi->info.uid, mi);
        }
    }
    g_ptr_array_add (matches, NULL);
    g_strfreev((char **)matches->pdata);
    g_ptr_array_free(matches, FALSE);
}


/*

  (match-folder "folder1" "folder2")

 */