path: root/mail/em-utils.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 *  Copyright 2003 Ximian, Inc. (www.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 Street #330, Boston, MA 02111-1307, USA.
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <time.h>

#include <glib.h>
#include <glib/gstdio.h>

#ifdef G_OS_WIN32
/* Work around namespace clobbage in <windows.h> */
#define DATADIR windows_DATADIR
#include <windows.h>
#undef DATADIR
#undef interface
#endif

#if !GLIB_CHECK_VERSION (2, 8, 0)
#define g_access access
#endif

#include <camel/camel-stream-fs.h>
#include <camel/camel-url-scanner.h>
#include <camel/camel-file-utils.h>

#include "em-filter-editor.h"

#include <bonobo/bonobo-listener.h>
#include <bonobo/bonobo-widget.h>
#include <bonobo/bonobo-event-source.h>

#include <libgnomevfs/gnome-vfs-mime.h>
#include <libgnomevfs/gnome-vfs-mime-utils.h>
#include <libgnomevfs/gnome-vfs-mime-handlers.h>
#include <libgnome/gnome-i18n.h>

#include "mail-component.h"
#include "mail-mt.h"
#include "mail-ops.h"
#include "mail-tools.h"
#include "mail-config.h"
#include "message-tag-followup.h"

#include <libedataserver/e-data-server-util.h>
#include "e-util/e-util.h"
#include "e-util/e-util-private.h"
#include "e-util/e-mktemp.h"
#include "libedataserver/e-account-list.h"
#include "e-util/e-dialog-utils.h"
#include "e-util/e-error.h"


#include "em-utils.h"
#include "em-composer-utils.h"
#include "em-folder-view.h"
#include "em-format-quote.h"
#include "em-account-editor.h"
#include "e-attachment.h"

static void emu_save_part_done (CamelMimePart *part, char *name, int done, void *data);

extern struct _CamelSession *session;

#define d(x)

static gboolean
emu_file_check_local (const char *name)
{
    CamelURL *url;
    gboolean local = FALSE;

    url = camel_url_new (name, NULL);
    if (url == NULL)
        return TRUE;

    if (!g_ascii_strcasecmp (url->protocol, "file")) 
        local = TRUE;
        
    camel_url_free (url);

    return local;
}
/**
 * em_utils_prompt_user:
 * @parent: parent window
 * @promptkey: gconf key to check if we should prompt the user or not.
 * @tag: e_error tag.
 * @arg0: The first of a NULL terminated list of arguments for the error.
 *
 * Convenience function to query the user with a Yes/No dialog and a
 * "Do not show this dialog again" checkbox. If the user checks that
 * checkbox, then @promptkey is set to %FALSE, otherwise it is set to
 * %TRUE.
 *
 * Returns %TRUE if the user clicks Yes or %FALSE otherwise.
 **/
gboolean
em_utils_prompt_user(GtkWindow *parent, const char *promptkey, const char *tag, const char *arg0, ...)
{
    GtkWidget *mbox, *check = NULL;
    va_list ap;
    int button;
    GConfClient *gconf = mail_config_get_gconf_client();

    if (promptkey
        && !gconf_client_get_bool(gconf, promptkey, NULL))
        return TRUE;

    va_start(ap, arg0);
    mbox = e_error_newv(parent, tag, arg0, ap);
    va_end(ap);

    if (promptkey) {
        check = gtk_check_button_new_with_label (_("Do not show this message again."));
        gtk_container_set_border_width((GtkContainer *)check, 12);
        gtk_box_pack_start ((GtkBox *)((GtkDialog *) mbox)->vbox, check, TRUE, TRUE, 0);
        gtk_widget_show (check);
    }
    
    button = gtk_dialog_run ((GtkDialog *) mbox);
    if (promptkey)
        gconf_client_set_bool(gconf, promptkey, !gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(check)), NULL);

    gtk_widget_destroy(mbox);
    
    return button == GTK_RESPONSE_YES;
}

/**
 * em_utils_uids_copy:
 * @uids: array of uids
 *
 * Duplicates the array of uids held by @uids into a new
 * GPtrArray. Use em_utils_uids_free() to free the resultant uid
 * array.
 *
 * Returns a duplicate copy of @uids.
 **/
GPtrArray *
em_utils_uids_copy (GPtrArray *uids)
{
    GPtrArray *copy;
    int i;
    
    copy = g_ptr_array_new ();
    g_ptr_array_set_size (copy, uids->len);
    
    for (i = 0; i < uids->len; i++)
        copy->pdata[i] = g_strdup (uids->pdata[i]);
    
    return copy;
}

/**
 * em_utils_uids_free:
 * @uids: array of uids
 *
 * Frees the array of uids pointed to by @uids back to the system.
 **/
void
em_utils_uids_free (GPtrArray *uids)
{
    int i;
    
    for (i = 0; i < uids->len; i++)
        g_free (uids->pdata[i]);
    
    g_ptr_array_free (uids, TRUE);
}

static void
druid_destroy_cb (gpointer user_data, GObject *deadbeef)
{
    gtk_main_quit ();
}

/**
 * em_utils_configure_account:
 * @parent: parent window for the druid to be a child of.
 *
 * Displays a druid allowing the user to configure an account. If
 * @parent is non-NULL, then the druid will be created as a child
 * window of @parent's toplevel window.
 *
 * Returns %TRUE if an account has been configured or %FALSE
 * otherwise.
 **/
gboolean
em_utils_configure_account (GtkWidget *parent)
{
    EMAccountEditor *emae;

    emae = em_account_editor_new(NULL, EMAE_DRUID, "org.gnome.evolution.mail.config.accountDruid");
    if (parent != NULL)
        e_dialog_set_transient_for((GtkWindow *)emae->editor, parent);

    g_object_weak_ref((GObject *)emae->editor, (GWeakNotify) druid_destroy_cb, NULL);
    gtk_widget_show(emae->editor);
    gtk_grab_add(emae->editor);
    gtk_main();
    
    return mail_config_is_configured();
}

/**
 * em_utils_check_user_can_send_mail:
 * @parent: parent window for the druid to be a child of.
 *
 * If no accounts have been configured, the user will be given a
 * chance to configure an account. In the case that no accounts are
 * configured, a druid will be created. If @parent is non-NULL, then
 * the druid will be created as a child window of @parent's toplevel
 * window.
 *
 * Returns %TRUE if the user has an account configured (to send mail)
 * or %FALSE otherwise.
 **/
gboolean
em_utils_check_user_can_send_mail (GtkWidget *parent)
{
    EAccount *account;
    
    if (!mail_config_is_configured ()) {
        if (!em_utils_configure_account (parent))
            return FALSE;
    }
    
    if (!(account = mail_config_get_default_account ()))
        return FALSE;
    
    /* Check for a transport */
    if (!account->transport->url)
        return FALSE;
    
    return TRUE;
}

/* Editing Filters/Search Folders... */

static GtkWidget *filter_editor = NULL;

static void
em_filter_editor_response (GtkWidget *dialog, int button, gpointer user_data)
{
    EMFilterContext *fc;
    
    if (button == GTK_RESPONSE_OK) {
        char *user;
        
        fc = g_object_get_data ((GObject *) dialog, "context");
        user = g_strdup_printf ("%s/mail/filters.xml",
                    mail_component_peek_base_directory (mail_component_peek ()));
        rule_context_save ((RuleContext *) fc, user);
        g_free (user);
    }
    
    gtk_widget_destroy (dialog);
    
    filter_editor = NULL;
}

static EMFilterSource em_filter_source_element_names[] = {
    { "incoming", },
    { "outgoing", },
    { 0 }
};

/**
 * em_utils_edit_filters:
 * @parent: parent window
 *
 * Opens or raises the filters editor dialog so that the user may edit
 * his/her filters. If @parent is non-NULL, then the dialog will be
 * created as a child window of @parent's toplevel window.
 **/
void
em_utils_edit_filters (GtkWidget *parent)
{
    const char *base_directory = mail_component_peek_base_directory (mail_component_peek ());
    char *user, *system;
    EMFilterContext *fc;
    
    if (filter_editor) {
        gdk_window_raise (GTK_WIDGET (filter_editor)->window);
        return;
    }
    
    fc = em_filter_context_new ();
    user = g_strdup_printf ("%s/mail/filters.xml", base_directory);
    system = g_build_filename (EVOLUTION_PRIVDATADIR, "filtertypes.xml", NULL);
    rule_context_load ((RuleContext *) fc, system, user);
    g_free (user);
    g_free (system);
    
    if (((RuleContext *) fc)->error) {
        e_error_run((GtkWindow *)parent, "mail:filter-load-error", ((RuleContext *)fc)->error, NULL);
        return;
    }

    if (em_filter_source_element_names[0].name == NULL) {
        em_filter_source_element_names[0].name = _("Incoming");
        em_filter_source_element_names[1].name = _("Outgoing");
    }

    filter_editor = (GtkWidget *) em_filter_editor_new (fc, em_filter_source_element_names);
    if (parent != NULL)
        e_dialog_set_transient_for ((GtkWindow *) filter_editor, parent);
    
    gtk_window_set_title (GTK_WINDOW (filter_editor), _("Message Filters"));
    g_object_set_data_full ((GObject *) filter_editor, "context", fc, (GtkDestroyNotify) g_object_unref);
    g_signal_connect (filter_editor, "response", G_CALLBACK (em_filter_editor_response), NULL);
    gtk_widget_show (GTK_WIDGET (filter_editor));
}

/* 
 * Picked this from e-d-s/libedataserver/e-data. 
 * But it allows more characters to occur in filenames, especially when saving attachment.
 */
void
em_filename_make_safe (gchar *string)
{
    gchar *p, *ts;
    gunichar c;
#ifdef G_OS_WIN32
    const char *unsafe_chars = "/\":*?<>|\\";
#else
    const char *unsafe_chars = "/";
#endif  
    
    g_return_if_fail (string != NULL);
    p = string;

    while(p && *p) {
        c = g_utf8_get_char (p);
        ts = p;
        p = g_utf8_next_char (p);
        /* I wonder what this code is supposed to actually
         * achieve, and whether it does that as currently
         * written?
         */
        if (!g_unichar_isprint(c) || ( c < 0xff && strchr (unsafe_chars, c&0xff ))) {
            while (ts<p)    
                *ts++ = '_';
        }
    }
}


/* Saving messages... */

static GtkWidget *
emu_get_save_filesel (GtkWidget *parent, const char *title, const char *name, GtkFileChooserAction action)
{
    GtkWidget *filesel;
    const char *dir;
    char *realname, *gdir;
    GConfClient *gconf;

#ifdef USE_GTKFILECHOOSER
    filesel = gtk_file_chooser_dialog_new (title,
                           NULL,
                           action,
                           GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                           GTK_STOCK_SAVE, GTK_RESPONSE_OK,
                           NULL);
    gtk_dialog_set_default_response (GTK_DIALOG (filesel), GTK_RESPONSE_OK);
    gtk_file_chooser_set_local_only (filesel, FALSE);
#else
    char *filename;

    filesel = gtk_file_selection_new (title);
#endif
    
    if (parent)
        e_dialog_set_transient_for((GtkWindow *)filesel, parent);

    gconf = gconf_client_get_default();
    dir = gdir = gconf_client_get_string(gconf, "/apps/evolution/mail/save_dir", NULL);
    g_object_unref(gconf);

    if (dir == NULL)
        dir = g_get_home_dir();

    if (name && name[0]) {
        realname = g_strdup (name);
        em_filename_make_safe (realname);
    } else {
        realname = NULL;
    }

#ifdef USE_GTKFILECHOOSER
    gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (filesel), dir);
    
    if (realname)
        gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (filesel), realname);
#else
    filename = g_build_filename (dir, G_DIR_SEPARATOR_S, realname, NULL);
    gtk_file_selection_set_filename (GTK_FILE_SELECTION (filesel), filename);
    g_free (filename);
#endif
    
    g_free (realname);
    g_free (gdir);

    return filesel;
}

static void
emu_update_save_path(const char *filename, gboolean path)
{
    char *dir = path ? (char *)filename : g_path_get_dirname(filename);
    GConfClient *gconf = gconf_client_get_default();

    gconf_client_set_string(gconf, "/apps/evolution/mail/save_dir", dir, NULL);
    g_object_unref(gconf);
    if (!path)
        g_free(dir);
}

static gboolean
emu_can_save(GtkWindow *parent, const char *path)
{
    struct stat st;
    
    if (!path || path[0] == 0)
        return FALSE;

    /* make sure we can actually save to it... */
    if (g_stat (path, &st) != -1 && !S_ISREG (st.st_mode))
        return FALSE;
    
    if (g_access (path, F_OK) == 0) {
        if (g_access (path, W_OK) != 0) {
            e_error_run(parent, "mail:no-save-path", path, g_strerror(errno), NULL);
            return FALSE;
        }
        
        return e_error_run(parent, E_ERROR_ASK_FILE_EXISTS_OVERWRITE, path, NULL) == GTK_RESPONSE_OK;
    }
    
    return TRUE;
}

static void
emu_save_part_response(GtkWidget *filesel, int response, CamelMimePart *part)
{
    const char *path;
    const char *uri;
    
    if (response == GTK_RESPONSE_OK) {
#ifdef USE_GTKFILECHOOSER
        uri = gtk_file_chooser_get_uri (GTK_FILE_CHOOSER (filesel));
        path = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (filesel));
#else
        path = gtk_file_selection_get_filename (GTK_FILE_SELECTION (filesel));
#endif

        if (emu_file_check_local(uri) && !emu_can_save((GtkWindow *)filesel, path))
            return;

        emu_update_save_path(path, FALSE);
        /* FIXME: popup error if it fails? */
        mail_save_part(part, uri, NULL, NULL, FALSE);
    }

    gtk_widget_destroy((GtkWidget *)filesel);
    camel_object_unref(part);
}

/**
 * em_utils_save_part:
 * @parent: parent window
 * @prompt: prompt string
 * @part: part to save
 *
 * Saves a mime part to disk (prompting the user for filename).
 **/
void
em_utils_save_part(GtkWidget *parent, const char *prompt, CamelMimePart *part)
{
    const char *name;
    GtkWidget *filesel;

    name = camel_mime_part_get_filename(part);
    if (name == NULL) {
        if (CAMEL_IS_MIME_MESSAGE(part)) {
            name = camel_mime_message_get_subject((CamelMimeMessage *)part);
            if (name == NULL)
                name = _("message");
        } else {
            name = _("attachment");
        }
    }

    filesel = emu_get_save_filesel(parent, prompt, name, GTK_FILE_CHOOSER_ACTION_SAVE);
    camel_object_ref(part);
    g_signal_connect (filesel, "response", G_CALLBACK (emu_save_part_response), part);
    gtk_widget_show (filesel);
}

static void
emu_save_parts_response (GtkWidget *filesel, int response, GSList *parts)
{
        char *path = NULL;
        GSList *selected;
        if (response == GTK_RESPONSE_OK) {
#ifdef USE_GTKFILECHOOSER
                path = gtk_file_chooser_get_current_folder_uri (GTK_FILE_CHOOSER (filesel));
#else
                path = gtk_file_selection_get_filename (GTK_FILE_SELECTION (filesel));
#endif

                emu_update_save_path(path, TRUE);

                for ( selected = parts; selected != NULL; selected = selected->next) {
                        const char *file_name;
            char *safe_name = NULL;
                        char *file_path;
                        CamelMimePart *part = selected->data;

                        file_name = camel_mime_part_get_filename(part);
                        if (file_name == NULL) {
                                if (CAMEL_IS_MIME_MESSAGE(part)) {
                                        file_name = camel_mime_message_get_subject((CamelMimeMessage *)part);
                                        if (file_name == NULL)
                                                file_name = _("message");
                                } else {
                                    file_name = _("attachment");
                                }
                        } else {
                safe_name = g_strdup(file_name);
                em_filename_make_safe(safe_name);
                file_name = safe_name;
            }
            
            file_path = g_build_filename (path, file_name, NULL);
            if (!g_file_test(file_path, (G_FILE_TEST_EXISTS)) || e_error_run(NULL, E_ERROR_ASK_FILE_EXISTS_OVERWRITE, file_name, NULL) == GTK_RESPONSE_OK)          
                mail_save_part(part, file_path, NULL, NULL, FALSE);
            else
                g_warning ("Could not save %s. File already exists", file_path);

            g_free (file_path);
            g_free (safe_name);
                }

        g_free (path);
        }
    
    g_slist_free (parts);
    gtk_widget_destroy((GtkWidget *)filesel);
}

void
em_utils_save_parts (GtkWidget *parent, const char *prompt, GSList * parts)
{
        GtkWidget *filesel;

        filesel = emu_get_save_filesel (parent, prompt, NULL, GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER);
        g_signal_connect (filesel, "response", G_CALLBACK (emu_save_parts_response), parts);
        gtk_widget_show (filesel);
}


/**
 * em_utils_save_part_to_file:
 * @parent: parent window
 * @filename: filename to save to
 * @part: part to save
 * 
 * Save a part's content to a specific file
 * Creates all needed directories and overwrites without prompting
 *
 * Returns %TRUE if saving succeeded, %FALSE otherwise
 **/
gboolean
em_utils_save_part_to_file(GtkWidget *parent, const char *filename, CamelMimePart *part) 
{
    int done;
    char *dirname;
    struct stat st;
    
    if (filename[0] == 0)
        return FALSE;
    
    dirname = g_path_get_dirname(filename);
    if (e_util_mkdir_hier(dirname, 0777) == -1) {
        e_error_run((GtkWindow *)parent, "mail:no-create-path", filename, g_strerror(errno), NULL);
        g_free(dirname);
        return FALSE;
    }
    g_free(dirname);

    if (g_access(filename, F_OK) == 0) {
        if (g_access(filename, W_OK) != 0) {
            e_error_run((GtkWindow *)parent, E_ERROR_ASK_FILE_EXISTS_OVERWRITE, filename, NULL);
            return FALSE;
        }
    }
    
    if (g_stat(filename, &st) != -1 && !S_ISREG(st.st_mode)) {
        e_error_run((GtkWindow *)parent, "mail:no-write-path-notfile", filename, NULL);
        return FALSE;
    }
    
    /* FIXME: This doesn't handle default charsets */
    mail_msg_wait(mail_save_part(part, filename, emu_save_part_done, &done, FALSE));
    
    return done;
}

struct _save_messages_data {
    CamelFolder *folder;
    GPtrArray *uids;
};

static void
emu_save_messages_response(GtkWidget *filesel, int response, struct _save_messages_data *data)
{
    const char *path;
    
    if (response == GTK_RESPONSE_OK) {
#ifdef USE_GTKFILECHOOSER
        path = gtk_file_chooser_get_uri (GTK_FILE_CHOOSER (filesel));
#else
        path = gtk_file_selection_get_filename (GTK_FILE_SELECTION (filesel));
#endif

        if (!emu_can_save((GtkWindow *)filesel, path))
            return;

        emu_update_save_path(path, FALSE);
        mail_save_messages(data->folder, data->uids, path, NULL, NULL);
        data->uids = NULL;
    }

    camel_object_unref(data->folder);
    if (data->uids)
        em_utils_uids_free(data->uids);
    g_free(data);
    gtk_widget_destroy((GtkWidget *)filesel);
}

/**
 * em_utils_save_messages:
 * @parent: parent window
 * @folder: folder containing messages to save
 * @uids: uids of messages to save
 *
 * Saves a group of messages to disk in mbox format (prompting the
 * user for filename).
 **/
void
em_utils_save_messages (GtkWidget *parent, CamelFolder *folder, GPtrArray *uids)
{
    struct _save_messages_data *data;
    GtkWidget *filesel;

    g_return_if_fail (CAMEL_IS_FOLDER (folder));
    g_return_if_fail (uids != NULL);

    filesel = emu_get_save_filesel(parent, _("Save Message..."), NULL, GTK_FILE_CHOOSER_ACTION_SAVE);
    camel_object_ref(folder);
    
    data = g_malloc(sizeof(struct _save_messages_data));
    data->folder = folder;
    data->uids = uids;

    g_signal_connect(filesel, "response", G_CALLBACK(emu_save_messages_response), data);
    gtk_widget_show((GtkWidget *)filesel);
}

/* ********************************************************************** */

static void
emu_add_address_cb(BonoboListener *listener, const char *name, const CORBA_any *any, CORBA_Environment *ev, void *data)
{
    char *type = bonobo_event_subtype(name);
    
    if (!strcmp(type, "Destroy"))
        gtk_widget_destroy((GtkWidget *)data);
    
    g_free(type);
}

/**
 * em_utils_add_address:
 * @parent: 
 * @email: 
 * 
 * Add address @email to the addressbook.
 **/
void em_utils_add_address(struct _GtkWidget *parent, const char *email)
{
    CamelInternetAddress *cia;
    GtkWidget *win;
    GtkWidget *control;
    /*GtkWidget *socket;*/
    char *buf;
    
    cia = camel_internet_address_new ();
    if (camel_address_decode ((CamelAddress *) cia, email) == -1) {
        camel_object_unref (cia);
        return;
    }
    
    buf = camel_address_format ((CamelAddress *) cia);
    camel_object_unref (cia);
    
    win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title((GtkWindow *)win, _("Add address"));
    gtk_window_set_transient_for((GtkWindow *)win, ((GtkWindow *)parent));
    gtk_window_set_position((GtkWindow *)win, GTK_WIN_POS_CENTER_ON_PARENT);
    gtk_window_set_type_hint((GtkWindow *)win, GDK_WINDOW_TYPE_HINT_DIALOG);

    control = bonobo_widget_new_control("OAFIID:GNOME_Evolution_Addressbook_AddressPopup:" BASE_VERSION, CORBA_OBJECT_NIL);
    bonobo_widget_set_property((BonoboWidget *)control, "email", TC_CORBA_string, buf, NULL);
    g_free (buf);
    
    bonobo_event_source_client_add_listener(bonobo_widget_get_objref((BonoboWidget *)control), emu_add_address_cb, NULL, NULL, win);
    
    /*socket = find_socket (GTK_CONTAINER (control));
      g_object_weak_ref ((GObject *) socket, (GWeakNotify) gtk_widget_destroy, win);*/

    gtk_container_add((GtkContainer *)win, control);
    gtk_widget_show_all(win);
}

/* ********************************************************************** */
/* Flag-for-Followup... */

/* tag-editor callback data */
struct ted_t {
    EMFolderView *emfv;
    MessageTagEditor *editor;
    CamelFolder *folder;
    GPtrArray *uids;
};

static void
ted_free (struct ted_t *ted)
{
    camel_object_unref (ted->folder);
    em_utils_uids_free (ted->uids);
    g_free (ted);
}

static void
tag_editor_response (GtkWidget *dialog, int button, struct ted_t *ted)
{
    CamelFolder *folder;
    CamelTag *tags, *t;
    GPtrArray *uids;
    int i;
    
    if (button == GTK_RESPONSE_OK && (tags = message_tag_editor_get_tag_list (ted->editor))) {
        folder = ted->folder;
        uids = ted->uids;
        
        camel_folder_freeze (folder);
        for (i = 0; i < uids->len; i++) {
            CamelMessageInfo *mi = camel_folder_get_message_info(folder, uids->pdata[i]);

            if (mi) {
                for (t = tags; t; t = t->next)
                    camel_message_info_set_user_tag(mi, t->name, t->value);

                camel_message_info_free(mi);
            }
        }
        
        camel_folder_thaw (folder);
        camel_tag_list_free (&tags);

        if (ted->emfv->preview)
            em_format_redraw(ted->emfv->preview);
    }
    
    gtk_widget_destroy (dialog);
}

/**
 * em_utils_flag_for_followup:
 * @parent: parent window
 * @folder: folder containing messages to flag
 * @uids: uids of messages to flag
 *
 * Open the Flag-for-Followup editor for the messages specified by
 * @folder and @uids.
 **/
void
em_utils_flag_for_followup (GtkWidget *parent, CamelFolder *folder, GPtrArray *uids)
{
    GtkWidget *editor;
    struct ted_t *ted;
    int i;
    
    g_return_if_fail (CAMEL_IS_FOLDER (folder));
    g_return_if_fail (uids != NULL);
    
    editor = (GtkWidget *) message_tag_followup_new ();
    
    if (parent != NULL)
        e_dialog_set_transient_for ((GtkWindow *) editor, parent);
    
    camel_object_ref (folder);
    
    ted = g_new (struct ted_t, 1);
    ted->emfv = (EMFolderView *) parent;
    ted->editor = MESSAGE_TAG_EDITOR (editor);
    ted->folder = folder;
    ted->uids = uids;
    
    for (i = 0; i < uids->len; i++) {
        CamelMessageInfo *info;
        
        info = camel_folder_get_message_info (folder, uids->pdata[i]);
        if (info) {
            message_tag_followup_append_message (MESSAGE_TAG_FOLLOWUP (editor),
                                 camel_message_info_from (info),
                                 camel_message_info_subject (info));
            camel_message_info_free(info);
        }
    }
    
    /* special-case... */
    if (uids->len == 1) {
        CamelMessageInfo *info;
        
        info = camel_folder_get_message_info (folder, uids->pdata[0]);
        if (info) {
            const CamelTag *tags = camel_message_info_user_tags(info);

            if (tags)
                message_tag_editor_set_tag_list (MESSAGE_TAG_EDITOR (editor), (CamelTag *)tags);
            camel_message_info_free(info);
        }
    }
    
    g_signal_connect (editor, "response", G_CALLBACK (tag_editor_response), ted);
    g_object_weak_ref ((GObject *) editor, (GWeakNotify) ted_free, ted);
    
    gtk_widget_show (editor);
}

/**
 * em_utils_flag_for_followup_clear:
 * @parent: parent window
 * @folder: folder containing messages to unflag
 * @uids: uids of messages to unflag
 *
 * Clears the Flag-for-Followup flag on the messages referenced by
 * @folder and @uids.
 **/
void
em_utils_flag_for_followup_clear (GtkWidget *parent, CamelFolder *folder, GPtrArray *uids)
{
    int i;
    
    g_return_if_fail (CAMEL_IS_FOLDER (folder));
    g_return_if_fail (uids != NULL);
    
    camel_folder_freeze (folder);
    for (i = 0; i < uids->len; i++) {
        CamelMessageInfo *mi = camel_folder_get_message_info(folder, uids->pdata[i]);

        if (mi) {
            camel_message_info_set_user_tag(mi, "follow-up", NULL);
            camel_message_info_set_user_tag(mi, "due-by", NULL);
            camel_message_info_set_user_tag(mi, "completed-on", NULL);
            camel_message_info_free(mi);
        }
    }
    camel_folder_thaw (folder);
    
    em_utils_uids_free (uids);
}

/**
 * em_utils_flag_for_followup_completed:
 * @parent: parent window
 * @folder: folder containing messages to 'complete'
 * @uids: uids of messages to 'complete'
 *
 * Sets the completed state (and date/time) for each message
 * referenced by @folder and @uids that is marked for
 * Flag-for-Followup.
 **/
void
em_utils_flag_for_followup_completed (GtkWidget *parent, CamelFolder *folder, GPtrArray *uids)
{
    char *now;
    int i;
    
    g_return_if_fail (CAMEL_IS_FOLDER (folder));
    g_return_if_fail (uids != NULL);
    
    now = camel_header_format_date (time (NULL), 0);
    
    camel_folder_freeze (folder);
    for (i = 0; i < uids->len; i++) {
        const char *tag;
        CamelMessageInfo *mi = camel_folder_get_message_info(folder, uids->pdata[i]);

        if (mi) {
            tag = camel_message_info_user_tag(mi, "follow-up");
            if (tag && tag[0])
                camel_message_info_set_user_tag(mi, "completed-on", now);
            camel_message_info_free(mi);
        }
    }
    camel_folder_thaw (folder);
    
    g_free (now);
    
    em_utils_uids_free (uids);
}

#include "camel/camel-stream-mem.h"
#include "camel/camel-stream-filter.h"
#include "camel/camel-mime-filter-from.h"

/* This kind of sucks, because for various reasons most callers need to run synchronously
   in the gui thread, however this could take a long, blocking time, to run */
static int
em_utils_write_messages_to_stream(CamelFolder *folder, GPtrArray *uids, CamelStream *stream)
{
    CamelStreamFilter *filtered_stream;
    CamelMimeFilterFrom *from_filter;
    int i, res = 0;

    from_filter = camel_mime_filter_from_new();
    filtered_stream = camel_stream_filter_new_with_stream(stream);
    camel_stream_filter_add(filtered_stream, (CamelMimeFilter *)from_filter);
    camel_object_unref(from_filter);
    
    for (i=0; i<uids->len; i++) {
        CamelMimeMessage *message;
        char *from;

        message = camel_folder_get_message(folder, uids->pdata[i], NULL);
        if (message == NULL) {
            res = -1;
            break;
        }

        /* we need to flush after each stream write since we are writing to the same stream */
        from = camel_mime_message_build_mbox_from(message);

        if (camel_stream_write_string(stream, from) == -1
            || camel_stream_flush(stream) == -1
            || camel_data_wrapper_write_to_stream((CamelDataWrapper *)message, (CamelStream *)filtered_stream) == -1
            || camel_stream_flush((CamelStream *)filtered_stream) == -1)
            res = -1;
        
        g_free(from);
        camel_object_unref(message);

        if (res == -1)
            break;
    }

    camel_object_unref(filtered_stream);

    return res;
}

/* This kind of sucks, because for various reasons most callers need to run synchronously
   in the gui thread, however this could take a long, blocking time, to run */
static int
em_utils_read_messages_from_stream(CamelFolder *folder, CamelStream *stream)
{
    CamelException *ex = camel_exception_new();
    CamelMimeParser *mp = camel_mime_parser_new();
    int res = -1;

    camel_mime_parser_scan_from(mp, TRUE);
    camel_mime_parser_init_with_stream(mp, stream);

    while (camel_mime_parser_step(mp, 0, 0) == CAMEL_MIME_PARSER_STATE_FROM) {
        CamelMimeMessage *msg;

        /* NB: de-from filter, once written */
        msg = camel_mime_message_new();
        if (camel_mime_part_construct_from_parser((CamelMimePart *)msg, mp) == -1) {
            camel_object_unref(msg);
            break;
        }
        
        camel_folder_append_message(folder, msg, NULL, NULL, ex);
        camel_object_unref(msg);
        
        if (camel_exception_is_set (ex))
            break;
        
        camel_mime_parser_step(mp, 0, 0);
    }
    
    camel_object_unref(mp);
    if (!camel_exception_is_set(ex))
        res = 0;
    camel_exception_free(ex);

    return res;
}

/**
 * em_utils_selection_set_mailbox:
 * @data: selection data
 * @folder: folder containign messages to copy into the selection
 * @uids: uids of the messages to copy into the selection
 * 
 * Creates a mailbox-format selection.
 * Warning: Could be BIG!
 * Warning: This could block the ui for an extended period.
 **/
void
em_utils_selection_set_mailbox(GtkSelectionData *data, CamelFolder *folder, GPtrArray *uids)
{
    CamelStream *stream;

    stream = camel_stream_mem_new();
    if (em_utils_write_messages_to_stream(folder, uids, stream) == 0)
        gtk_selection_data_set(data, data->target, 8,
                       ((CamelStreamMem *)stream)->buffer->data,
                       ((CamelStreamMem *)stream)->buffer->len);

    camel_object_unref(stream);
}

/**
 * em_utils_selection_get_mailbox:
 * @data: selection data
 * @folder: 
 * 
 * Receive a mailbox selection/dnd
 * Warning: Could be BIG!
 * Warning: This could block the ui for an extended period.
 * FIXME: Exceptions?
 **/
void
em_utils_selection_get_mailbox(GtkSelectionData *data, CamelFolder *folder)
{
    CamelStream *stream;

    if (data->data == NULL || data->length == -1)
        return;

    /* TODO: a stream mem with read-only access to existing data? */
    /* NB: Although copying would let us run this async ... which it should */
    stream = camel_stream_mem_new_with_buffer(data->data, data->length);
    em_utils_read_messages_from_stream(folder, stream);
    camel_object_unref(stream);
}

/**
 * em_utils_selection_get_message:
 * @data: 
 * @folder: 
 * 
 * get a message/rfc822 data.
 **/
void
em_utils_selection_get_message(GtkSelectionData *data, CamelFolder *folder)
{
    CamelStream *stream;
    CamelException *ex;
    CamelMimeMessage *msg;

    if (data->data == NULL || data->length == -1)
        return;

    ex = camel_exception_new();
    stream = camel_stream_mem_new_with_buffer(data->data, data->length);
    msg = camel_mime_message_new();
    if (camel_data_wrapper_construct_from_stream((CamelDataWrapper *)msg, stream) == 0)
        camel_folder_append_message(folder, msg, NULL, NULL, ex);
    camel_object_unref(msg);
    camel_object_unref(stream);
    camel_exception_free(ex);
}

/**
 * em_utils_selection_set_uidlist:
 * @data: selection data
 * @uri:
 * @uids: 
 * 
 * Sets a "x-uid-list" format selection data.
 *
 * FIXME: be nice if this could take a folder argument rather than uri
 **/
void
em_utils_selection_set_uidlist(GtkSelectionData *data, const char *uri, GPtrArray *uids)
{
    GByteArray *array = g_byte_array_new();
    int i;

    /* format: "uri\0uid1\0uid2\0uid3\0...\0uidn\0" */
    
    g_byte_array_append(array, uri, strlen(uri)+1);

    for (i=0; i<uids->len; i++)
        g_byte_array_append(array, uids->pdata[i], strlen(uids->pdata[i])+1);
        
    gtk_selection_data_set(data, data->target, 8, array->data, array->len);
    g_byte_array_free(array, TRUE);
}

/**
 * em_utils_selection_get_uidlist:
 * @data: selection data
 * @move: do we delete the messages.
 * 
 * Convert a uid list into a copy/move operation.
 * 
 * Warning: Could take some time to run.
 **/
void
em_utils_selection_get_uidlist(GtkSelectionData *data, CamelFolder *dest, int move, CamelException *ex)
{
    /* format: "uri\0uid1\0uid2\0uid3\0...\0uidn" */
    char *inptr, *inend;
    GPtrArray *uids;
    CamelFolder *folder;

    if (data == NULL || data->data == NULL || data->length == -1)
        return;
    
    uids = g_ptr_array_new();

    inptr = data->data;
    inend = data->data + data->length;
    while (inptr < inend) {
        char *start = inptr;

        while (inptr < inend && *inptr)
            inptr++;

        if (start > (char *)data->data)
            g_ptr_array_add(uids, g_strndup(start, inptr-start));

        inptr++;
    }

    if (uids->len == 0) {
        g_ptr_array_free(uids, TRUE);
        return;
    }

    folder = mail_tool_uri_to_folder(data->data, 0, ex);
    if (folder) {
        camel_folder_transfer_messages_to(folder, uids, dest, NULL, move, ex);
        camel_object_unref(folder);
    }

    em_utils_uids_free(uids);
}

/**
 * em_utils_selection_set_urilist:
 * @data: 
 * @folder: 
 * @uids: 
 * 
 * Set the selection data @data to a uri which points to a file, which is
 * a berkely mailbox format mailbox.  The file is automatically cleaned
 * up when the application quits.
 **/
void
em_utils_selection_set_urilist(GtkSelectionData *data, CamelFolder *folder, GPtrArray *uids)
{
    char *tmpdir;
    CamelStream *fstream;
    char *uri, *file = NULL, *tmpfile;
    int fd;
    CamelMessageInfo *info;

    tmpdir = e_mkdtemp("drag-n-drop-XXXXXX");
    if (tmpdir == NULL)
        return;

    /* Try to get the drop filename from the message or folder */
    if (uids->len == 1) {
        info = camel_folder_get_message_info(folder, uids->pdata[0]);
        if (info) {
            file = g_strdup(camel_message_info_subject(info));
            camel_folder_free_message_info(folder, info);
        }
    }

    /* TODO: Handle conflicts? */
    if (file == NULL) {
        /* Drop filename for messages from a mailbox */
        file = g_strdup_printf(_("Messages from %s"), folder->name);
    }

    e_filename_make_safe(file);

    tmpfile = g_build_filename(tmpdir, file, NULL);
    g_free(tmpdir);
    g_free(file);
    
    fd = g_open(tmpfile, O_WRONLY | O_CREAT | O_EXCL | O_BINARY, 0666);
    if (fd == -1) {
        g_free(tmpfile);
        return;
    }

    uri = g_filename_to_uri(tmpfile, NULL, NULL);
    g_free(tmpfile);
    fstream = camel_stream_fs_new_with_fd(fd);
    if (fstream) {
        if (em_utils_write_messages_to_stream(folder, uids, fstream) == 0) {
            /* terminate with \r\n to be compliant with the spec */
            char *uri_crlf = g_strconcat(uri, "\r\n", NULL);

            gtk_selection_data_set(data, data->target, 8, uri_crlf, strlen(uri_crlf));
            g_free(uri_crlf);
        }

        camel_object_unref(fstream);
    }
    g_free(uri);
}

/**
 * em_utils_selection_set_urilist:
 * @data: 
 * @folder: 
 * @uids: 
 * 
 * Get the selection data @data from a uri list which points to a
 * file, which is a berkely mailbox format mailbox.  The file is
 * automatically cleaned up when the application quits.
 **/
void
em_utils_selection_get_urilist(GtkSelectionData *data, CamelFolder *folder)
{
    CamelStream *stream;
    CamelURL *url;
    int fd, i, res = 0;
    char *tmp, **uris;

    d(printf(" * drop uri list\n"));

    tmp = g_strndup(data->data, data->length);
    uris = g_strsplit(tmp, "\n", 0);
    g_free(tmp);
    for (i=0;res == 0 && uris[i];i++) {
        g_strstrip(uris[i]);
        if (uris[i][0] == '#')
            continue;

        url = camel_url_new(uris[i], NULL);
        if (url == NULL)
            continue;

        if (strcmp(url->protocol, "file") == 0
            && (fd = g_open(url->path, O_RDONLY | O_BINARY, 0)) != -1) {
            stream = camel_stream_fs_new_with_fd(fd);
            res = em_utils_read_messages_from_stream(folder, stream);
            camel_object_unref(stream);
        }
        camel_url_free(url);
    }

    g_strfreev(uris);
}

static void
emu_save_part_done(CamelMimePart *part, char *name, int done, void *data)
{
    ((int *)data)[0] = done;
}

/**
 * em_utils_temp_save_part:
 * @parent: 
 * @part: 
 * 
 * Save a part's content to a temporary file, and return the
 * filename.
 * 
 * Return value: NULL if anything failed.
 **/
char *
em_utils_temp_save_part(GtkWidget *parent, CamelMimePart *part, gboolean mode)
{
    const char *filename;
    char *tmpdir, *path, *utf8_mfilename = NULL, *mfilename = NULL;
    int done;

    tmpdir = e_mkdtemp("evolution-tmp-XXXXXX");
    if (tmpdir == NULL) {
        e_error_run((GtkWindow *)parent, "mail:no-create-tmp-path", g_strerror(errno), NULL);
        return NULL;
    }

    filename = camel_mime_part_get_filename (part);
    if (filename == NULL) {
        /* This is the default filename used for temporary file creation */
        filename = _("Unknown");
    } else {
        utf8_mfilename = g_strdup (filename);
        e_filename_make_safe (utf8_mfilename);
        mfilename = g_filename_from_utf8 ((const char *) utf8_mfilename, -1, NULL, NULL, NULL);
        g_free (utf8_mfilename);
        filename = (const char *) mfilename;
    }

    path = g_build_filename(tmpdir, filename, NULL);
    g_free(tmpdir);
    g_free(mfilename);
        
    /* FIXME: This doesn't handle default charsets */
    if (mode)
        mail_msg_wait(mail_save_part(part, path, emu_save_part_done, &done, TRUE));
    else
        mail_msg_wait(mail_save_part(part, path, emu_save_part_done, &done, FALSE));
    if (!done) {
        /* mail_save_part should popup an error box automagically */
        g_free(path);
        path = NULL;
    }

    return path;
}


/**
 * em_utils_folder_is_drafts:
 * @folder: folder
 * @uri: uri for this folder, if known
 *
 * Decides if @folder is a Drafts folder.
 * 
 * Returns %TRUE if this is a Drafts folder or %FALSE otherwise.
 **/
gboolean
em_utils_folder_is_drafts(CamelFolder *folder, const char *uri)
{
    EAccountList *accounts;
    EAccount *account;
    EIterator *iter;
    int is = FALSE;
    char *drafts_uri;
    
    if (folder == mail_component_get_folder(NULL, MAIL_COMPONENT_FOLDER_DRAFTS))
        return TRUE;

    if (uri == NULL)
        return FALSE;
    
    accounts = mail_config_get_accounts();
    iter = e_list_get_iterator((EList *)accounts);
    while (e_iterator_is_valid(iter)) {
        account = (EAccount *)e_iterator_get(iter);
        
        if (account->drafts_folder_uri) {
            drafts_uri = em_uri_to_camel (account->drafts_folder_uri);
            if (camel_store_folder_uri_equal (folder->parent_store, drafts_uri, uri)) {
                g_free (drafts_uri);
                is = TRUE;
                break;
            }
            g_free (drafts_uri);
        }
        
        e_iterator_next(iter);
    }
    
    g_object_unref(iter);
    
    return is;
}

/**
 * em_utils_folder_is_sent:
 * @folder: folder
 * @uri: uri for this folder, if known
 *
 * Decides if @folder is a Sent folder
 * 
 * Returns %TRUE if this is a Sent folder or %FALSE otherwise.
 **/
gboolean
em_utils_folder_is_sent(CamelFolder *folder, const char *uri)
{
    EAccountList *accounts;
    EAccount *account;
    EIterator *iter;
    int is = FALSE;
    char *sent_uri;
    
    if (folder == mail_component_get_folder(NULL, MAIL_COMPONENT_FOLDER_SENT))
        return TRUE;
    
    if (uri == NULL)
        return FALSE;
    
    accounts = mail_config_get_accounts();
    iter = e_list_get_iterator((EList *)accounts);
    while (e_iterator_is_valid(iter)) {
        account = (EAccount *)e_iterator_get(iter);
        
        if (account->sent_folder_uri) {
            sent_uri = em_uri_to_camel (account->sent_folder_uri);
            if (camel_store_folder_uri_equal (folder->parent_store, sent_uri, uri)) {
                g_free (sent_uri);
                is = TRUE;
                break;
            }
            g_free (sent_uri);
        }
        
        e_iterator_next(iter);
    }
    
    g_object_unref(iter);
    
    return is;
}

/**
 * em_utils_folder_is_outbox:
 * @folder: folder
 * @uri: uri for this folder, if known
 *
 * Decides if @folder is an Outbox folder
 * 
 * Returns %TRUE if this is an Outbox folder or %FALSE otherwise.
 **/
gboolean
em_utils_folder_is_outbox(CamelFolder *folder, const char *uri)
{
    /* <Highlander>There can be only one.</Highlander> */
    return folder == mail_component_get_folder(NULL, MAIL_COMPONENT_FOLDER_OUTBOX);
}

/**
 * em_utils_adjustment_page:
 * @adj: 
 * @down: 
 * 
 * Move an adjustment up/down forward/back one page.
 **/
void
em_utils_adjustment_page(GtkAdjustment *adj, gboolean down)
{
    float page_size = adj->page_size - adj->step_increment;

    if (down) {
        if (adj->value < adj->upper - adj->page_size - page_size)
            adj->value += page_size;
        else if (adj->upper >= adj->page_size)
            adj->value = adj->upper - adj->page_size;
        else
            adj->value = adj->lower;
    } else {
        if (adj->value > adj->lower + page_size)
            adj->value -= page_size;
        else
            adj->value = adj->lower;
    }

    gtk_adjustment_value_changed(adj);
}

/* ********************************************************************** */
static char *emu_proxy_uri;
static int emu_proxy_init = 0;
static pthread_mutex_t emu_proxy_lock = PTHREAD_MUTEX_INITIALIZER;

static void
emu_set_proxy(GConfClient *client, int needlock)
{
    char *server, *uri = NULL;
    int port;

    if (gconf_client_get_bool(client, "/system/http_proxy/use_http_proxy", NULL)) {
        server = gconf_client_get_string(client, "/system/http_proxy/host", NULL);
        port = gconf_client_get_int(client, "/system/http_proxy/port", NULL);

        if (server && server[0]) {
            if (gconf_client_get_bool(client, "/system/http_proxy/use_authentication", NULL)) {
                char *user = gconf_client_get_string(client, "/system/http_proxy/authentication_user", NULL);
                char *pass = gconf_client_get_string(client, "/system/http_proxy/authentication_password", NULL);

                uri = g_strdup_printf("http://%s:%s@%s:%d", user, pass, server, port);
                g_free(user);
                g_free(pass);
            } else {
                uri = g_strdup_printf("http://%s:%d", server, port);
            }
        }

        g_free(server);
    }

    if (needlock)
        pthread_mutex_lock(&emu_proxy_lock);

    g_free(emu_proxy_uri);
    emu_proxy_uri = uri;

    if (needlock)
        pthread_mutex_unlock(&emu_proxy_lock);

}

static void
emu_proxy_changed(GConfClient *client, guint32 cnxn_id, GConfEntry *entry, gpointer user_data)
{
    emu_set_proxy(client, TRUE);
}

static void *
emu_proxy_setup(void *data)
{
    GConfClient *client = gconf_client_get_default();

    gconf_client_add_dir(client, "/system/http_proxy", GCONF_CLIENT_PRELOAD_ONELEVEL, NULL);
    gconf_client_notify_add(client, "/system/http_proxy", emu_proxy_changed, NULL, NULL, NULL);
    emu_set_proxy(client, FALSE);
    g_object_unref(client);

    return NULL;
}

/**
 * em_utils_get_proxy_uri:
 * 
 * Get the system proxy uri.
 * 
 * Return value: Must be freed when finished with.
 **/
char *
em_utils_get_proxy_uri(void)
{
    char *uri;

    pthread_mutex_lock(&emu_proxy_lock);

    if (!emu_proxy_init) {
        mail_call_main(MAIL_CALL_p_p, emu_proxy_setup, NULL);
        emu_proxy_init = TRUE;
    }

    uri = g_strdup(emu_proxy_uri);

    pthread_mutex_unlock(&emu_proxy_lock);

    return uri;
}

/**
 * em_utils_part_to_html:
 * @part:
 *
 * Converts a mime part's contents into html text.  If @credits is given,
 * then it will be used as an attribution string, and the
 * content will be cited.  Otherwise no citation or attribution
 * will be performed.
 * 
 * Return Value: The part in displayable html format.
 **/
char *
em_utils_part_to_html(CamelMimePart *part, ssize_t *len, EMFormat *source)
{
    EMFormatQuote *emfq;
    CamelStreamMem *mem;
    GByteArray *buf;
    char *text;
    
    buf = g_byte_array_new ();
    mem = (CamelStreamMem *) camel_stream_mem_new ();
    camel_stream_mem_set_byte_array (mem, buf);
    
    emfq = em_format_quote_new(NULL, (CamelStream *)mem, 0);
    em_format_set_session((EMFormat *)emfq, session);
    if (source) {
        /* copy over things we can, other things are internal, perhaps need different api than 'clone' */
        if (source->default_charset)
            em_format_set_default_charset((EMFormat *)emfq, source->default_charset);
        if (source->charset)
            em_format_set_default_charset((EMFormat *)emfq, source->charset);
    }
    em_format_part((EMFormat *) emfq, (CamelStream *)mem, part);
    g_object_unref(emfq);

    camel_stream_write((CamelStream *) mem, "", 1);
    camel_object_unref(mem);

    text = buf->data;
    if (len)
        *len = buf->len-1;
    g_byte_array_free (buf, FALSE);

    return text;
}

/**
 * em_utils_message_to_html:
 * @message:
 * @credits: 
 * @flags: EMFormatQuote flags
 * @len:
 * @source:
 *
 * Convert a message to html, quoting if the @credits attribution
 * string is given.
 * 
 * Return value: The html version.
 **/
char *
em_utils_message_to_html(CamelMimeMessage *message, const char *credits, guint32 flags, ssize_t *len, EMFormat *source)
{
    EMFormatQuote *emfq;
    CamelStreamMem *mem;
    GByteArray *buf;
    char *text;

    buf = g_byte_array_new ();
    mem = (CamelStreamMem *) camel_stream_mem_new ();
    camel_stream_mem_set_byte_array (mem, buf);

    emfq = em_format_quote_new(credits, (CamelStream *)mem, flags);
    em_format_set_session((EMFormat *)emfq, session);
    
    if (!source) {
        GConfClient *gconf;
        char *charset;
        
        /* FIXME: we should be getting this from the current view, not the global setting. */
        gconf = gconf_client_get_default ();
        charset = gconf_client_get_string (gconf, "/apps/evolution/mail/display/charset", NULL);
        em_format_set_default_charset ((EMFormat *) emfq, charset);
        g_object_unref (gconf);
        g_free (charset);
    }
    
    em_format_format_clone((EMFormat *)emfq, NULL, NULL, message, source);
    g_object_unref (emfq);

    camel_stream_write((CamelStream *)mem, "", 1);
    camel_object_unref(mem);

    text = buf->data;
    if (len)
        *len = buf->len-1;
    g_byte_array_free(buf, FALSE);

    return text;
}

/* ********************************************************************** */

/**
 * em_utils_expunge_folder:
 * @parent: parent window
 * @folder: folder to expunge
 *
 * Expunges @folder.
 **/
void
em_utils_expunge_folder (GtkWidget *parent, CamelFolder *folder)
{
    char *name;

    camel_object_get(folder, NULL, CAMEL_OBJECT_DESCRIPTION, &name, 0);

    if (!em_utils_prompt_user ((GtkWindow *) parent, "/apps/evolution/mail/prompts/expunge", "mail:ask-expunge", name, NULL))
        return;
    
    mail_expunge_folder(folder, NULL, NULL);
}

/**
 * em_utils_empty_trash:
 * @parent: parent window
 *
 * Empties all Trash folders.
 **/
void
em_utils_empty_trash (GtkWidget *parent)
{
    CamelProvider *provider;
    EAccountList *accounts;
    EAccount *account;
    EIterator *iter;
    CamelException ex;
    
    if (!em_utils_prompt_user((GtkWindow *) parent, "/apps/evolution/mail/prompts/empty_trash", "mail:ask-empty-trash", NULL))
        return;
    
    camel_exception_init (&ex);
    
    /* expunge all remote stores */
    accounts = mail_config_get_accounts ();
    iter = e_list_get_iterator ((EList *) accounts);
    while (e_iterator_is_valid (iter)) {
        account = (EAccount *) e_iterator_get (iter);
        
        /* make sure this is a valid source */
        if (account->enabled && account->source->url) {
            provider = camel_provider_get(account->source->url, &ex);
            if (provider) {
                /* make sure this store is a remote store */
                if (provider->flags & CAMEL_PROVIDER_IS_STORAGE &&
                    provider->flags & CAMEL_PROVIDER_IS_REMOTE) {
                    mail_empty_trash (account, NULL, NULL);
                }
            }
            
            /* clear the exception for the next round */
            camel_exception_clear (&ex);
        }
        
        e_iterator_next (iter);
    }
    
    g_object_unref (iter);
    
    /* Now empty the local trash folder */
    mail_empty_trash (NULL, NULL, NULL);
}

char *
em_utils_folder_name_from_uri (const char *uri)
{
    CamelURL *url;
    char *folder_name = NULL;
    
    if (uri == NULL || (url = camel_url_new (uri, NULL)) == NULL)
        return NULL;
    
    if (url->fragment)
        folder_name = url->fragment;
    else if (url->path)
        folder_name = url->path + 1;
    
    if (folder_name == NULL) {
        camel_url_free (url);
        return NULL;
    }
    
    folder_name = g_strdup (folder_name);
    camel_url_free (url);
    
    return folder_name;
}

/* email: uri's are based on the account, with special cases for local
 * stores, vfolder and local mail.
 * e.g.
 *  imap account imap://user@host/ -> email://accountid@accountid.host/
 *  vfolder      vfolder:/storage/path#folder -> email://vfolder@local/folder
 *  local        local:/storage/path#folder   -> email://local@local/folder
 */

char *em_uri_from_camel(const char *curi)
{
    CamelURL *curl;
    EAccount *account;
    const char *uid, *path;
    char *euri, *tmp;
    CamelProvider *provider;
    CamelException ex;

    /* Easiest solution to code that shouldnt be calling us */
    if (!strncmp(curi, "email:", 6))
        return g_strdup(curi);

    camel_exception_init(&ex);
    provider = camel_provider_get(curi, &ex);
    if (provider == NULL) {
        camel_exception_clear(&ex);
        d(printf("em uri from camel failed '%s'\n", curi));
        return g_strdup(curi);
    }

    curl = camel_url_new(curi, &ex);
    camel_exception_clear(&ex);
    if (curl == NULL)
        return g_strdup(curi);

    if (strcmp(curl->protocol, "vfolder") == 0)
        uid = "vfolder@local";
    else if ((account = mail_config_get_account_by_source_url(curi)) == NULL)
        uid = "local@local";
    else
        uid = account->uid;
    path = (provider->url_flags & CAMEL_URL_FRAGMENT_IS_PATH)?curl->fragment:curl->path;
    if (path) {
        if (path[0] == '/')
            path++;

        tmp = camel_url_encode(path, ";?");
        euri = g_strdup_printf("email://%s/%s", uid, tmp);
        g_free(tmp);
    } else {
        euri = g_strdup_printf("email://%s/", uid);
    }
    
    d(printf("em uri from camel '%s' -> '%s'\n", curi, euri));

    camel_url_free(curl);

    return euri;
}

char *em_uri_to_camel(const char *euri)
{
    EAccountList *accounts;
    const EAccount *account;
    EAccountService *service;
    CamelProvider *provider;
    CamelURL *eurl, *curl;
    char *uid, *curi;

    if (strncmp(euri, "email:", 6) != 0) {
        d(printf("em uri to camel not euri '%s'\n", euri));
        return g_strdup(euri);
    }

    eurl = camel_url_new(euri, NULL);
    if (eurl == NULL)
        return g_strdup(euri);

    g_assert(eurl->host != NULL);

    if (eurl->user != NULL) {
        /* Sigh, shoul'dve used mbox@local for mailboxes, not local@local */
        if (strcmp(eurl->host, "local") == 0
            && (strcmp(eurl->user, "local") == 0 || strcmp(eurl->user, "vfolder") == 0)) {
            char *base;

            if (strcmp(eurl->user, "vfolder") == 0)
                curl = camel_url_new("vfolder:", NULL);
            else
                curl = camel_url_new("mbox:", NULL);

            base = g_strdup_printf("%s/.evolution/mail/%s", g_get_home_dir(), eurl->user);
#ifdef G_OS_WIN32
            /* Turn backslashes into slashes to avoid URI encoding */
            {
                char *p = base;
                while ((p = strchr (p, '\\')))
                    *p++ = '/';
            }
#endif
            camel_url_set_path(curl, base);
            g_free(base);
            camel_url_set_fragment(curl, eurl->path[0]=='/'?eurl->path+1:eurl->path);
            curi = camel_url_to_string(curl, 0);
            camel_url_free(curl);
            camel_url_free(eurl);

            d(printf("em uri to camel local '%s' -> '%s'\n", euri, curi));
            return curi;
        }

        uid = g_strdup_printf("%s@%s", eurl->user, eurl->host);
    } else {
        uid = g_strdup(eurl->host);
    }

    accounts = mail_config_get_accounts();
    account = e_account_list_find(accounts, E_ACCOUNT_FIND_UID, uid);
    g_free(uid);

    if (account == NULL) {
        camel_url_free(eurl);
        d(printf("em uri to camel no account '%s' -> '%s'\n", euri, euri));
        return g_strdup(euri);
    }

    service = account->source;
    if (!(provider = camel_provider_get (service->url, NULL)))
        return g_strdup (euri);
    
    curl = camel_url_new(service->url, NULL);
    if (provider->url_flags & CAMEL_URL_FRAGMENT_IS_PATH)
        camel_url_set_fragment(curl, eurl->path[0]=='/'?eurl->path+1:eurl->path);
    else
        camel_url_set_path(curl, eurl->path);

    curi = camel_url_to_string(curl, 0);

    camel_url_free(eurl);
    camel_url_free(curl);

    d(printf("em uri to camel '%s' -> '%s'\n", euri, curi));

    return curi;
}

/* ********************************************************************** */
#include <libebook/e-book.h>

struct _addr_node {
    char *addr;
    time_t stamp;
    int found;
};

#define EMU_ADDR_CACHE_TIME (60*30) /* in seconds */

static pthread_mutex_t emu_addr_lock = PTHREAD_MUTEX_INITIALIZER;
static ESourceList *emu_addr_list;
static GHashTable *emu_addr_cache;

/* runs sync, in main thread */
static void *
emu_addr_setup(void *dummy)
{
    GError *err = NULL;

    emu_addr_cache = g_hash_table_new(g_str_hash, g_str_equal);

    if (!e_book_get_addressbooks(&emu_addr_list, &err))
        g_error_free(err);

    return NULL;
}

static void
emu_addr_cancel_book(void *data)
{
    EBook *book = data;
    GError *err = NULL;

    /* we dunna care if this fails, its just the best we can try */
    e_book_cancel(book, &err);
    g_clear_error(&err);
}

gboolean
em_utils_in_addressbook(CamelInternetAddress *iaddr)
{
    GError *err = NULL;
    GSList *s, *g, *addr_sources = NULL;
    int stop = FALSE, found = FALSE;
    EBookQuery *query;
    const char *addr;
    struct _addr_node *node;
    time_t now;

    /* TODO: check all addresses? */
    if (iaddr == NULL
        || !camel_internet_address_get(iaddr, 0, NULL, &addr))
        return FALSE;

    pthread_mutex_lock(&emu_addr_lock);

    if (emu_addr_cache == NULL) {
        mail_call_main(MAIL_CALL_p_p, emu_addr_setup, NULL);
    }

    if (emu_addr_list == NULL) {
        pthread_mutex_unlock(&emu_addr_lock);
        return FALSE;
    }

    now = time(0);

    d(printf("Checking '%s' is in addressbook", addr));

    node = g_hash_table_lookup(emu_addr_cache, addr);
    if (node) {
        d(printf(" -> cached, found %s\n", node->found?"yes":"no"));
        if (node->stamp + EMU_ADDR_CACHE_TIME > now) {
            found = node->found;
            pthread_mutex_unlock(&emu_addr_lock);
            return found;
        }
        d(printf("    but expired!\n"));
    } else {
        d(printf(" -> not found in cache\n"));
        node = g_malloc0(sizeof(*node));
        node->addr = g_strdup(addr);
        g_hash_table_insert(emu_addr_cache, node->addr, node);
    }

    query = e_book_query_field_test(E_CONTACT_EMAIL, E_BOOK_QUERY_IS, addr);

    /* FIXME: this aint threadsafe by any measure, but what can you do eh??? */

    for (g = e_source_list_peek_groups(emu_addr_list);g;g=g_slist_next(g)) {
        for (s = e_source_group_peek_sources((ESourceGroup *)g->data);s;s=g_slist_next(s)) {
            ESource *src = s->data;
            const char *completion = e_source_get_property (src, "completion");

            if (completion && !g_ascii_strcasecmp (completion, "true")) {
                addr_sources = g_slist_prepend(addr_sources, src);
                g_object_ref(src);
            }
        }
    }

    for (s = addr_sources;!stop && !found && s;s=g_slist_next(s)) {
        ESource *source = s->data;
        GList *contacts;
        EBook *book;
        void *hook;

        d(printf(" checking '%s'\n", e_source_get_uri(source)));

        /* could this take a while?  no way to cancel it? */
        book = e_book_new(source, &err);

        if (book == NULL) {
            g_warning("Unable to create addressbook: %s", err->message);
            g_clear_error(&err);
            continue;
        }

        hook = mail_cancel_hook_add(emu_addr_cancel_book, book);

        /* ignore errors, but cancellation errors we don't try to go further either */
        if (!e_book_open(book, TRUE, &err)
            || !e_book_get_contacts(book, query, &contacts, &err)) {
            stop = err->domain == E_BOOK_ERROR && err->code == E_BOOK_ERROR_CANCELLED;
            mail_cancel_hook_remove(hook);
            g_object_unref(book);
            g_warning("Can't get contacts: %s", err->message);
            g_clear_error(&err);
            continue;
        }

        mail_cancel_hook_remove(hook);

        if (contacts != NULL) {
            found = TRUE;
            g_list_foreach(contacts, (GFunc)g_object_unref, NULL);
            g_list_free(contacts);
        }

        d(printf(" %s\n", stop?"found":"not found"));

        g_object_unref(book);
    }

    g_slist_free(addr_sources);

    if (!stop) {
        node->found = found;
        node->stamp = now;
    }

    e_book_query_unref(query);

    pthread_mutex_unlock(&emu_addr_lock);

    return found;
}

/**
 * em_utils_snoop_type:
 * @part: 
 * 
 * Tries to snoop the mime type of a part.
 * 
 * Return value: NULL if unknown (more likely application/octet-stream).
 **/
const char *
em_utils_snoop_type(CamelMimePart *part)
{
    const char *filename, *name_type = NULL, *magic_type = NULL;
    CamelDataWrapper *dw;
    
    filename = camel_mime_part_get_filename (part);
    if (filename) {
        /* GNOME-VFS will misidentify TNEF attachments as MPEG */
        if (!strcmp (filename, "winmail.dat"))
            return "application/vnd.ms-tnef";
        
        name_type = gnome_vfs_mime_type_from_name(filename);
    }
    
    dw = camel_medium_get_content_object((CamelMedium *)part);
    if (!camel_data_wrapper_is_offline(dw)) {
        CamelStreamMem *mem = (CamelStreamMem *)camel_stream_mem_new();

        if (camel_data_wrapper_decode_to_stream(dw, (CamelStream *)mem) > 0)
            magic_type = gnome_vfs_get_mime_type_for_data(mem->buffer->data, mem->buffer->len);
        camel_object_unref(mem);
    }

    d(printf("snooped part, magic_type '%s' name_type '%s'\n", magic_type, name_type));

    /* If GNOME-VFS doesn't recognize the data by magic, but it
     * contains English words, it will call it text/plain. If the
     * filename-based check came up with something different, use
     * that instead and if it returns "application/octet-stream"
     * try to do better with the filename check.
     */
    
    if (magic_type) {
        if (name_type
            && (!strcmp(magic_type, "text/plain")
            || !strcmp(magic_type, "application/octet-stream")))
            return name_type;
        else
            return magic_type;
    } else
        return name_type;

    /* We used to load parts to check their type, we dont anymore,
       see bug #11778 for some discussion */
}