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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* mail-ops.c: callbacks for the mail toolbar/menus */

/* 
 * Author : 
 *  Dan Winship <danw@helixcode.com>
 *
 * Copyright 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 <errno.h>
#include <gnome.h>
#include "mail.h"
#include "folder-browser.h"
#include "e-util/e-setup.h"
#include "filter/filter-editor.h"
#include "filter/filter-driver.h"

#ifndef HAVE_MKSTEMP
#include <fcntl.h>
#include <sys/stat.h>
#endif

static void
mail_exception_dialog (char *head, CamelException *ex, gpointer widget)
{
    char *msg;
    GtkWindow *window =
        GTK_WINDOW (gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW));

    msg = g_strdup_printf ("%s:\n%s", head,
                   camel_exception_get_description (ex));
    gnome_error_dialog_parented (msg, window);
    g_free (msg);
}

static gboolean
check_configured (void)
{
    char *path;
    gboolean configured;

    path = g_strdup_printf ("=%s/config=/mail/configured", evolution_dir);
    if (gnome_config_get_bool (path)) {
        g_free (path);
        return TRUE;
    }

    mail_config_druid ();

    configured = gnome_config_get_bool (path);
    g_free (path);
    return configured;
}

/* FIXME: This is BROKEN! It fetches mail into whatever folder you're
 * currently viewing.
 */
void
fetch_mail (GtkWidget *button, gpointer user_data)
{
    FolderBrowser *fb = FOLDER_BROWSER (user_data);
    CamelException *ex;
    CamelStore *store = NULL;
    CamelFolder *folder = NULL;
    char *path, *url = NULL;
    FilterDriver *filter = NULL;
    char *userrules, *systemrules;
    char *tmp_mbox = NULL, *source;

    if (!check_configured ())
        return;

    path = g_strdup_printf ("=%s/config=/mail/source", evolution_dir);
    url = gnome_config_get_string (path);
    g_free (path);
    if (!url) {
        GtkWidget *win = gtk_widget_get_ancestor (GTK_WIDGET (fb),
                              GTK_TYPE_WINDOW);

        gnome_error_dialog_parented ("You have no remote mail source "
                         "configured", GTK_WINDOW (win));
        return;
    }

    path = CAMEL_SERVICE (fb->folder->parent_store)->url->path;
    ex = camel_exception_new ();

    tmp_mbox = g_strdup_printf ("%s/movemail", path);

    /* If fetching mail from an mbox store, safely copy it to a
     * temporary store first.
     */
    if (!strncmp (url, "mbox:", 5)) {
        int tmpfd;

        printf("moving from a local mbox\n");

        tmpfd = open (tmp_mbox, O_RDWR | O_CREAT | O_APPEND, S_IRUSR | S_IWUSR);

        if (tmpfd == -1) {
            camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                          "Couldn't create temporary "
                          "mbox: %s", g_strerror (errno));
            mail_exception_dialog ("Unable to move mail", ex, fb);
            goto cleanup;
        }
        close (tmpfd);

        /* Skip over "mbox:" plus host part (if any) of url. */
        source = url + 5;
        if (!strncmp (source, "//", 2))
            source = strchr (source + 2, '/');

        switch (camel_movemail (source, tmp_mbox, ex)) {
        case -1:
            mail_exception_dialog ("Unable to move mail", ex, fb);
            /* FALL THROUGH */

        case 0:
            goto cleanup;
        }

        folder = camel_store_get_folder (fb->folder->parent_store,
                         strrchr (tmp_mbox, '/') + 1,
                         ex);
        camel_folder_open (folder, FOLDER_OPEN_READ, ex);

        if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
            mail_exception_dialog ("Unable to move mail", ex, fb);
            goto cleanup;
        }
    } else {
        CamelFolder *sourcefolder;

        store = camel_session_get_store (session, url, ex);
        if (!store) {
            mail_exception_dialog ("Unable to get new mail", ex, fb);
            goto cleanup;
        }
        camel_service_connect_with_url (CAMEL_SERVICE (store),
                        url, ex);
        if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
            mail_exception_dialog ("Unable to get new mail", ex, fb);
            goto cleanup;
        }

        sourcefolder = camel_store_get_folder (store, "inbox", ex);
        camel_folder_open (sourcefolder, FOLDER_OPEN_READ, ex);
        if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
            mail_exception_dialog ("Unable to get new mail", ex, fb);
            goto cleanup;
        }

        /* can we perform filtering on this source? */
        if (!(sourcefolder->has_summary_capability
              && sourcefolder->has_search_capability)) {
            GPtrArray *uids;
            int i;

            printf("folder isn't searchable, performing movemail ...\n");

            folder = camel_store_get_folder (fb->folder->parent_store,
                             strrchr (tmp_mbox, '/') + 1,
                             ex);

            if (!camel_folder_exists(folder, ex)) {
                camel_folder_create(folder, ex);
            }
            
            camel_folder_open(folder, FOLDER_OPEN_RW, ex);

            if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
                mail_exception_dialog ("Unable to move mail", ex, fb);
                goto cleanup;
            }
            
            uids = camel_folder_get_uids (sourcefolder, ex);
            printf("got %d messages in source\n", uids->len);
            for (i = 0; i < uids->len; i++) {
                CamelMimeMessage *msg;
                printf("copying message %d to dest\n", i + 1);
                msg = camel_folder_get_message_by_uid (sourcefolder, uids->pdata[i], ex);
                if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
                    mail_exception_dialog ("Unable to read message", ex, fb);
                    gtk_object_unref((GtkObject *)msg);
                    gtk_object_unref((GtkObject *)sourcefolder);
                    goto cleanup;
                }

                camel_folder_append_message (folder, msg, ex);
                if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
                    mail_exception_dialog ("Unable to write message", ex, fb);
                    gtk_object_unref((GtkObject *)msg);
                    gtk_object_unref((GtkObject *)sourcefolder);
                    goto cleanup;
                }

                camel_folder_delete_message_by_uid(sourcefolder, uids->pdata[i], ex);
                gtk_object_unref((GtkObject *)msg);
            }
            camel_folder_free_uids (sourcefolder, uids);
            gtk_object_unref((GtkObject *)sourcefolder);
        } else {
            printf("we can search on this folder, performing search!\n");
            folder = sourcefolder;
        }
    }

    /* apply filtering rules to this inbox */
    filter = filter_driver_new();
    userrules = g_strdup_printf ("%s/filters.xml", evolution_dir);
    systemrules = g_strdup_printf("%s/evolution/filtertypes.xml", EVOLUTION_DATADIR);
    filter_driver_set_rules(filter, systemrules, userrules);
    filter_driver_set_session(filter, session);
    g_free(userrules);
    g_free(systemrules);

    if (filter_driver_run(filter, folder, fb->folder) == -1) {
        mail_exception_dialog ("Unable to get new mail", ex, fb);
        goto cleanup;
    }

    /* Redisplay. Ick. FIXME */
    path = g_strdup_printf ("file://%s", path);
    folder_browser_set_uri (fb, path);
    g_free (path);

 cleanup:
    g_free(tmp_mbox);

    if (filter)
        gtk_object_unref((GtkObject *)filter);
    if (url)
        g_free (url);
    if (folder) {
        if (camel_folder_is_open (folder))
            camel_folder_close (folder, TRUE, ex);
        gtk_object_unref (GTK_OBJECT (folder));
    }
    if (store) {
        camel_service_disconnect (CAMEL_SERVICE (store), ex);
        gtk_object_unref (GTK_OBJECT (store));
    }
    camel_exception_free (ex);
}


struct post_send_data {
    CamelMimeMessage *message;
    guint32 flags;
};

static void
composer_send_cb (EMsgComposer *composer, gpointer data)
{
    static CamelTransport *transport = NULL;
    struct post_send_data *psd = data;
    static char *from = NULL;
    CamelException *ex;
    CamelMimeMessage *message;
    char *name, *addr, *path;

    ex = camel_exception_new ();

    if (!from) {
        CamelInternetAddress *ciaddr;

        path = g_strdup_printf ("=%s/config=/mail/id_name",
                    evolution_dir);
        name = gnome_config_get_string (path);
        g_assert (name);
        g_free (path);
        path = g_strdup_printf ("=%s/config=/mail/id_addr",
                    evolution_dir);
        addr = gnome_config_get_string (path);
        g_assert (addr);
        g_free (path);

        ciaddr = camel_internet_address_new ();
        camel_internet_address_add (ciaddr, name, addr);

        from = camel_address_encode (CAMEL_ADDRESS (ciaddr));
    }

    if (!transport) {
        char *url;

        path = g_strdup_printf ("=%s/config=/mail/transport",
                    evolution_dir);
        url = gnome_config_get_string (path);
        g_assert (url);
        g_free (path);

        transport = camel_session_get_transport (session, url, ex);
        if (camel_exception_get_id (ex) != CAMEL_EXCEPTION_NONE) {
            mail_exception_dialog ("Could not load mail transport",
                           ex, composer);
            camel_exception_free (ex);
            goto free_psd;
        }
    }

    message = e_msg_composer_get_message (composer);
    gtk_object_destroy (GTK_OBJECT (composer));

    camel_mime_message_set_from (message, from);
    camel_medium_add_header (CAMEL_MEDIUM (message), "X-Mailer",
                 "Evolution (Developer Preview)");
    camel_mime_message_set_date (message, CAMEL_MESSAGE_DATE_CURRENT, 0);

    camel_service_connect (CAMEL_SERVICE (transport), ex);
    if (!camel_exception_is_set (ex))
        camel_transport_send (transport, CAMEL_MEDIUM (message), ex);
    if (!camel_exception_is_set (ex))
        camel_service_disconnect (CAMEL_SERVICE (transport), ex);
    if (camel_exception_is_set (ex))
        mail_exception_dialog ("Could not send message", ex, composer);
    else if (psd) {
        guint32 set;

        set = camel_mime_message_get_flags (psd->message);
        camel_mime_message_set_flags (psd->message, psd->flags, ~set);
    }

    camel_exception_free (ex);
    gtk_object_unref (GTK_OBJECT (message));

 free_psd:
    if (psd) {
        gtk_object_unref (GTK_OBJECT (psd->message));
        g_free (psd);
    }
}


void
send_msg (GtkWidget *widget, gpointer user_data)
{
    GtkWidget *composer;

    if (!check_configured ())
        return;

    composer = e_msg_composer_new ();

    gtk_signal_connect (GTK_OBJECT (composer), "send",
                GTK_SIGNAL_FUNC (composer_send_cb), NULL);
    gtk_widget_show (composer);
}

/* Send according to a mailto (RFC 2368) URL. */
void
send_to_url (const char *url)
{
    GtkWidget *composer;

    if (!check_configured ())
        return;

    composer = e_msg_composer_new_from_url (url);

    gtk_signal_connect (GTK_OBJECT (composer), "send",
                GTK_SIGNAL_FUNC (composer_send_cb), NULL);
    gtk_widget_show (composer);
}   

static void
reply (FolderBrowser *fb, gboolean to_all)
{
    EMsgComposer *composer;
    struct post_send_data *psd;

    if (!check_configured ())
        return;

    psd = g_new (struct post_send_data, 1);
    psd->message = fb->mail_display->current_message;
    gtk_object_ref (GTK_OBJECT (psd->message));
    psd->flags = CAMEL_MESSAGE_ANSWERED;

    composer = mail_generate_reply (psd->message, to_all);

    gtk_signal_connect (GTK_OBJECT (composer), "send",
                GTK_SIGNAL_FUNC (composer_send_cb), psd); 

    gtk_widget_show (GTK_WIDGET (composer));    
}

void
reply_to_sender (GtkWidget *button, gpointer user_data)
{
    reply (FOLDER_BROWSER (user_data), FALSE);
}

void
reply_to_all (GtkWidget *button, gpointer user_data)
{
    reply (FOLDER_BROWSER (user_data), TRUE);
}


void
forward_msg (GtkWidget *button, gpointer user_data)
{
    FolderBrowser *fb;
    EMsgComposer *composer;

    if (!check_configured ())
        return;

    fb = FOLDER_BROWSER (user_data);
    composer = mail_generate_forward (fb->mail_display->current_message,
                      TRUE, TRUE);

    gtk_signal_connect (GTK_OBJECT (composer), "send",
                GTK_SIGNAL_FUNC (composer_send_cb), NULL);

    gtk_widget_show (GTK_WIDGET (composer));    
}

void
delete_msg (GtkWidget *button, gpointer user_data)
{
    FolderBrowser *fb = user_data;

    if (fb->mail_display->current_message) {
        guint32 flags;

        /* FIXME: table should watch the message with a signal and update display! */

        flags = camel_mime_message_get_flags(fb->mail_display->current_message);
        camel_mime_message_set_flags(fb->mail_display->current_message, CAMEL_MESSAGE_DELETED, ~flags);
        printf("Message %s set to %s\n", fb->mail_display->current_message->message_uid, flags&CAMEL_MESSAGE_DELETED?"UNDELETED":"DELETED");
    }
}

void
expunge_folder (GtkWidget *button, gpointer user_data)
{
    FolderBrowser *fb = FOLDER_BROWSER(user_data);
    CamelException ex;

    if (fb->message_list->folder) {
        camel_exception_init(&ex);

        camel_folder_expunge(fb->message_list->folder, &ex);

        /* FIXME: is there a better way to force an update? */
        /* FIXME: Folder should raise a signal to say its contents has changed ... */
        e_table_model_changed (fb->message_list->table_model);

/* this always throws an error, when it shouldn't? */
#if 0
        if (camel_exception_get_id (&ex) != CAMEL_EXCEPTION_NONE) {
            mail_exception_dialog ("Unable to expunge deleted messages", &ex, fb);
        }
#endif
    }
}

static void
filter_druid_clicked(FilterEditor *fe, int button, FolderBrowser *fb)
{
    printf("closing dialog\n");
    if (button == 0) {
        char *user;

        user = g_strdup_printf ("%s/filters.xml", evolution_dir);
        filter_editor_save_rules(fe, user);
        printf("saving filter options to '%s'\n", user);
        g_free(user);
    }
    if (button != -1) {
        gnome_dialog_close((GnomeDialog *)fe);
    }
}

void filter_edit (GtkWidget *button, gpointer user_data)
{
    FolderBrowser *fb = FOLDER_BROWSER(user_data);
    FilterEditor *fe;
    char *user, *system;

    printf("Editing filters ...\n");
    fe = filter_editor_new();

    user = g_strdup_printf ("%s/filters.xml", evolution_dir);
    system = g_strdup_printf("%s/evolution/filtertypes.xml", EVOLUTION_DATADIR);
    filter_editor_set_rule_files(fe, system, user);
    g_free(user);
    g_free(system);
    gnome_dialog_append_buttons((GnomeDialog *)fe, GNOME_STOCK_BUTTON_OK, GNOME_STOCK_BUTTON_CANCEL, 0);
    gtk_signal_connect((GtkObject *)fe, "clicked", filter_druid_clicked, fb);
    gtk_widget_show((GtkWidget *)fe);
}