path: root/mail/mail-tools.c

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

/* 
 * Authors: 
 *  Dan Winship <danw@helixcode.com>
 *  Peter Williams <peterw@helixcode.com>
 *  Jeffrey Stedfast <fejj@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 <ctype.h>
#include <errno.h>
#include "camel/camel.h"
#include "camel/providers/vee/camel-vee-folder.h"
#include "mail-vfolder.h"
#include "filter/vfolder-rule.h"
#include "filter/vfolder-context.h"
#include "filter/filter-option.h"
#include "filter/filter-input.h"
#include "filter/filter-driver.h"
#include "mail.h" /*session*/
#include "mail-tools.h"
#include "mail-local.h"
#include "e-util/e-html-utils.h"

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

G_LOCK_DEFINE_STATIC (camel);
G_LOCK_DEFINE_STATIC (camel_locklevel);
static GPrivate *camel_locklevel = NULL;

#define LOCK_VAL (GPOINTER_TO_INT (g_private_get (camel_locklevel)))
#define LOCK_SET(val) g_private_set (camel_locklevel, (GINT_TO_POINTER (val)))

void mail_tool_camel_lock_up (void)
{
    G_LOCK (camel_locklevel);

    if (camel_locklevel == NULL)
        camel_locklevel = g_private_new (GINT_TO_POINTER (0));
    
        if (LOCK_VAL == 0) {
        G_UNLOCK (camel_locklevel);
                G_LOCK (camel);
        G_LOCK (camel_locklevel);
    }

        LOCK_SET (LOCK_VAL + 1);

        G_UNLOCK (camel_locklevel);
}

void mail_tool_camel_lock_down (void)
{
        G_LOCK (camel_locklevel);

        if (camel_locklevel == NULL) {
                g_warning ("mail_tool_camel_lock_down: lock down before a lock up?");
                camel_locklevel = g_private_new (GINT_TO_POINTER (0));
                return;
        }

        LOCK_SET (LOCK_VAL - 1);

        if (LOCK_VAL == 0)
                G_UNLOCK (camel);

        G_UNLOCK (camel_locklevel);
}

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

CamelFolder *
mail_tool_get_folder_from_urlname (const gchar *url, const gchar *name,
                   guint32 flags, CamelException *ex)
{
    CamelStore *store;
    CamelFolder *folder;

    mail_tool_camel_lock_up();

    store = camel_session_get_store (session, url, ex);
    if (!store) {
        mail_tool_camel_lock_down();
        return NULL;
    }

    /*camel_service_connect (CAMEL_SERVICE (store), ex);
     *if (camel_exception_is_set (ex)) {
     *  camel_object_unref (CAMEL_OBJECT (store));
     *  mail_tool_camel_lock_down();
     *  return NULL;
     *}
     */

    folder = camel_store_get_folder (store, name, flags, ex);
    camel_object_unref (CAMEL_OBJECT (store));
    mail_tool_camel_lock_down();

    return folder;
}

const gchar *
mail_tool_get_folder_name (CamelFolder *folder)
{
    const char *name = camel_folder_get_full_name (folder);
    char *path;

    /* This is a kludge. */

    if (strcmp (name, "//mbox") && strcmp (name, "//mh"))
        return name;

    /* For mbox/mh, return the parent store's final path component. */
    path = CAMEL_SERVICE (folder->parent_store)->url->path;
    if (strchr (path, '/'))
        return strrchr (path, '/') + 1;
    else
        return path;
}

gchar *
mail_tool_get_local_movemail_path (void)
{
    return g_strdup_printf ("%s/local/Inbox/movemail", evolution_dir);
}

CamelFolder *
mail_tool_get_local_inbox (CamelException *ex)
{
    gchar *url;
    CamelFolder *folder;

    url = g_strdup_printf("file://%s/local/Inbox", evolution_dir);
    folder = mail_tool_uri_to_folder (url, ex);
    g_free (url);
    return folder;
}

CamelFolder *
mail_tool_get_inbox (const gchar *url, CamelException *ex)
{
    /* FIXME: should be smarter? get_default_folder, etc */
    return mail_tool_get_folder_from_urlname (url, "inbox", 0, ex);
}
    

/* why is this function so stupidly complex when allthe work is done elsehwere? */
char *
mail_tool_do_movemail (const gchar *source_url, CamelException *ex)
{
    gchar *dest_path;
    const gchar *source;
    struct stat sb;
#ifndef MOVEMAIL_PATH
    int tmpfd;
#endif
    g_return_val_if_fail (strncmp (source_url, "mbox:", 5) == 0, NULL);

    /* Set up our destination. */

    dest_path = mail_tool_get_local_movemail_path();

    /* Create a new movemail mailbox file of 0 size */

#ifndef MOVEMAIL_PATH
    tmpfd = open (dest_path, 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': %s"), dest_path, g_strerror (errno));
        g_free (dest_path);
        return NULL;
    }

    close (tmpfd);
#endif

    /* Skip over "mbox:" plus host part (if any) of url. */

    source = source_url + 5;
    if (!strncmp (source, "//", 2))
        source = strchr (source + 2, '/');


    /* Movemail from source (source_url) to dest_path */

    mail_tool_camel_lock_up();
    camel_movemail (source, dest_path, ex);
    mail_tool_camel_lock_down();

    if (stat (dest_path, &sb) < 0 || sb.st_size == 0) {
        g_free (dest_path);
        return NULL;
    }

    if (camel_exception_is_set (ex)) {
        g_free (dest_path);
        return NULL;
    }

    return dest_path;
}

void
mail_tool_move_folder_contents (CamelFolder *source, CamelFolder *dest, gboolean use_cache, CamelException *ex)
{
    CamelUIDCache *cache;
    GPtrArray *uids;
    int i;
    gboolean summary_capability;
    time_t last_update = 0;

    mail_tool_camel_lock_up();

    camel_object_ref (CAMEL_OBJECT (source));
    camel_object_ref (CAMEL_OBJECT (dest));

    /* Get all uids of source */

    mail_op_set_message (_("Examining %s"), source->full_name);

    uids = camel_folder_get_uids (source);
    printf ("mail_tool_move_folder: got %d messages in source\n", uids->len);

    /* If we're using the cache, ... use it */

    if (use_cache) {
        GPtrArray *new_uids;
        char *url, *p, *filename;

        url = camel_url_to_string (
            CAMEL_SERVICE (source->parent_store)->url, FALSE);
        for (p = url; *p; p++) {
            if (!isascii ((unsigned char)*p) ||
                strchr (" /'\"`&();|<>${}!", *p))
                *p = '_';
        }
        filename = g_strdup_printf ("%s/config/cache-%s",
                        evolution_dir, url);
        g_free (url);

        cache = camel_uid_cache_new (filename);

        if (cache) {
            new_uids = camel_uid_cache_get_new_uids (cache, uids);
            camel_folder_free_uids (source, uids);
            uids = new_uids;
        } else {
            camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
                          _("Could not read UID "
                          "cache file \"%s\". You may "
                          "receive duplicate "
                          "messages."), filename);
        }

        g_free (filename);
    } else
        cache = NULL;

    printf ("mail_tool_move_folder: %d of those messages are new\n", uids->len);

    summary_capability = camel_folder_has_summary_capability (source);

    /* Copy the messages */
    for (i = 0; i < uids->len; i++) {
        CamelMimeMessage *msg;
        CamelMessageInfo *info = NULL;
        const gboolean last_message = (i+1 == uids->len);
        time_t now;

        /* Info */

        /*
         * Only update display every 2 seconds, as mail_op_set_message
         * is an expensive operation
         */
        time (&now);
        if (last_message || ((now - last_update) > 2)) {
            mail_op_set_message (_("Retrieving message %d of %d"),
                         i + 1, uids->len);
            last_update = now;
        }

        /* Get the message */

        msg = camel_folder_get_message (source, uids->pdata[i], ex);
        if (camel_exception_is_set (ex)) {
            camel_object_unref (CAMEL_OBJECT (msg));
            goto cleanup;
        }
        
        /* Append it to dest */

        mail_op_set_message (_("Writing message %d of %d"),
                     i + 1, uids->len);

        if (summary_capability)
            info = camel_folder_get_message_info (source, uids->pdata[i]);
        camel_folder_append_message (dest, msg, info, ex);
        if (summary_capability)
            camel_folder_free_message_info(source, info);

        if (camel_exception_is_set (ex)) {
            camel_object_unref (CAMEL_OBJECT (msg));
            goto cleanup;
        }

        /* (Maybe) get rid of the message */

        camel_object_unref (CAMEL_OBJECT (msg));
        if (!use_cache)
            camel_folder_delete_message (source, uids->pdata[i]);
    }

    /* All done. Sync n' free. */

    if (cache) {
        camel_uid_cache_free_uids (uids);
        
        if (!camel_exception_is_set (ex))
            camel_uid_cache_save (cache);
        camel_uid_cache_destroy (cache);
    } else
        camel_folder_free_uids (source, uids);

    mail_op_set_message (_("Saving changes to %s"), source->full_name);

    camel_folder_sync (source, TRUE, ex);

 cleanup:
    camel_object_unref (CAMEL_OBJECT (source));
    camel_object_unref (CAMEL_OBJECT (dest));
    mail_tool_camel_lock_down();
}

void
mail_tool_set_uid_flags (CamelFolder *folder, const char *uid, guint32 mask, guint32 set)
{
    mail_tool_camel_lock_up ();
    camel_folder_set_message_flags (folder, uid, mask, set);
    mail_tool_camel_lock_down ();
}

char *
mail_tool_generate_forward_subject (CamelMimeMessage *msg)
{
    const char *subject;
    char *fwd_subj, *fromstr;
    const CamelInternetAddress *from;

    /* we need to lock around the whole function, as we are
       only getting references to the message's data */
    mail_tool_camel_lock_up();

    from = camel_mime_message_get_from(msg);
    subject = camel_mime_message_get_subject(msg);

    if (from) {
        fromstr = camel_address_format((CamelAddress *)from);
        if (subject && *subject) {
            fwd_subj = g_strdup_printf ("[%s] %s", fromstr, subject);
        } else {
            fwd_subj = g_strdup_printf (_("[%s] (forwarded message)"),
                            fromstr);
        }
        g_free(fromstr);
    } else {
        if (subject && *subject) {
            if (strncmp (subject, "Fwd: ", 5) == 0)
                subject += 4;
            fwd_subj = g_strdup_printf ("Fwd: %s", subject);
        } else
            fwd_subj = g_strdup (_("Fwd: (no subject)"));
    }

    mail_tool_camel_lock_down();

    return fwd_subj;
}

void
mail_tool_send_via_transport (CamelTransport *transport, CamelMedium *medium, CamelException *ex)
{
    mail_tool_camel_lock_up();

    /*camel_service_connect (CAMEL_SERVICE (transport), ex);*/

    if (camel_exception_is_set (ex))
        goto cleanup;

    camel_transport_send (transport, medium, ex);

    /*camel_service_disconnect (CAMEL_SERVICE (transport),
     *camel_exception_is_set (ex) ? NULL : ex);*/

 cleanup:
    mail_tool_camel_lock_down();
}

CamelMimePart *
mail_tool_make_message_attachment (CamelMimeMessage *message)
{
    CamelMimePart *part;
    const char *subject;
    gchar *desc;

    mail_tool_camel_lock_up();
    /*camel_object_ref (CAMEL_OBJECT (message));*/

    subject = camel_mime_message_get_subject (message);
    if (subject)
        desc = g_strdup_printf (_("Forwarded message - %s"), subject);
    else
        desc = g_strdup (_("Forwarded message (no subject)"));

    part = camel_mime_part_new ();
    camel_mime_part_set_disposition (part, "inline");
    camel_mime_part_set_description (part, desc);
    camel_medium_set_content_object (CAMEL_MEDIUM (part),
                     CAMEL_DATA_WRAPPER (message));
    camel_mime_part_set_content_type (part, "message/rfc822");
    /*camel_object_unref (CAMEL_OBJECT (message));*/
    mail_tool_camel_lock_down();
    return part;
}

CamelFolder *
mail_tool_filter_get_folder_func (FilterDriver *d, const char *uri, void *data)
{
    return mail_tool_uri_to_folder_noex (uri);
}

CamelFolder *
mail_tool_get_root_of_store (const char *source_uri, CamelException *ex)
{
    CamelStore *store;
    CamelFolder *folder;

    mail_tool_camel_lock_up();

    store = camel_session_get_store (session, source_uri, ex);
    if (!store) {
        mail_tool_camel_lock_down ();
        return NULL;
    }

    /*camel_service_connect (CAMEL_SERVICE (store), ex);
     *if (camel_exception_is_set (ex)) {
     *  camel_object_unref (CAMEL_OBJECT (store));
     *  mail_tool_camel_lock_down();
     *  return NULL;
     *}
     */

    folder = camel_store_get_root_folder (store, ex);
    camel_object_unref (CAMEL_OBJECT (store));
    mail_tool_camel_lock_down();

    return folder;
}

CamelFolder *
mail_tool_uri_to_folder (const char *uri, CamelException *ex)
{
    CamelURL *url;
    CamelStore *store = NULL;
    CamelFolder *folder = NULL;

    url = camel_url_new (uri, ex);
    if (!url)
        return NULL;

    if (!strcmp (url->protocol, "vfolder")) {
        folder = vfolder_uri_to_folder (uri, ex);
    } else {
        mail_tool_camel_lock_up ();
        store = camel_session_get_store (session, uri, ex);
        if (store) {
            char *name;

            if (url->path && *url->path)
                name = url->path + 1;
            else
                name = "";
            folder = camel_store_get_folder (
                store, name, CAMEL_STORE_FOLDER_CREATE, ex);
        }
        mail_tool_camel_lock_down ();
    }

    if (camel_exception_is_set (ex)) {
        if (folder) {
            camel_object_unref (CAMEL_OBJECT (folder));
            folder = NULL;
        }
    }
    if (store)
        camel_object_unref (CAMEL_OBJECT (store));
    camel_url_free (url);

    return folder;
}

CamelFolder *
mail_tool_uri_to_folder_noex (const char *uri)
{
    CamelException ex;
    CamelFolder *result;

    camel_exception_init (&ex);
    result = mail_tool_uri_to_folder (uri, &ex);

    if (camel_exception_is_set (&ex)) {
        gchar *msg;
        GtkWidget *dialog;

        msg = g_strdup_printf (_("Cannot open location `%s':\n"
                       "%s"),
                       uri,
                       camel_exception_get_description (&ex));
        dialog = gnome_error_dialog (msg);
        g_free (msg);
        gnome_dialog_run_and_close (GNOME_DIALOG (dialog));
        gtk_widget_destroy (dialog);
    }

    return result;
}

/**
 * mail_tool_quote_message:
 * @message: mime message to quote
 * @fmt: credits format - example: "On %s, %s wrote:\n"
 * @Varargs: arguments
 *
 * Returns an allocated buffer containing the quoted message.
 */
gchar *
mail_tool_quote_message (CamelMimeMessage *message, const char *fmt, ...)
{
    CamelDataWrapper *contents;
    gboolean want_plain, is_html;
    gchar *text;
    
    want_plain = !mail_config_send_html ();
    contents = camel_medium_get_content_object (CAMEL_MEDIUM (message));
    text = mail_get_message_body (contents, want_plain, &is_html);
    
    /* Set the quoted reply text. */
    if (text) {
        gchar *ret_text, *credits = NULL;
        
        /* create credits */
        if (fmt) {
            va_list ap;
            
            va_start (ap, fmt);
            credits = g_strdup_vprintf (fmt, ap);
            va_end (ap);
        }
        
        if (is_html) {
            if (credits) {
                ret_text = g_strdup_printf ("<blockquote><i>\n%s\n%s\n"
                                "</i></blockquote>\n",
                                credits, text);
            } else {
                ret_text = g_strdup_printf ("<blockquote><i>\n%s\n"
                                "</i></blockquote>\n",
                                text);
            }
        } else {
            gchar *s, *d, *quoted_text;
            gint lines, len, offset = 0;
            
            /* Count the number of lines in the body. If
             * the text ends with a \n, this will be one
             * too high, but that's ok. Allocate enough
             * space for the text and the "> "s.
             */
            for (s = text, lines = 0; s; s = strchr (s + 1, '\n'))
                lines++;
            
            offset = credits ? strlen (credits) : 0;

            /* offset is the size of the credits, strlen (text)
             * covers the body, lines * 2 does the "> "s, and
             * the last +2 covers the final "\0", plus an extra
             * "\n" in case text doesn't end with one.
             */
            quoted_text = g_malloc (offset + strlen (text) +
                        lines * 2 + 2);
            
            if (credits)
                memcpy (quoted_text, credits, offset);
            
            s = text;
            d = quoted_text + offset;
            
            /* Copy text to quoted_text line by line,
             * prepending "> ".
             */
            while (1) {
                len = strcspn (s, "\n");
                if (len == 0 && !*s)
                    break;
                sprintf (d, "> %.*s\n", len, s);
                s += len;
                if (!*s++)
                    break;
                d += len + 3;
            }
            *d = '\0';
            
            /* Now convert that to HTML. */
            ret_text = e_text_to_html (quoted_text, E_TEXT_TO_HTML_PRE);
            g_free (quoted_text);
        }
        
        g_free (text);
        return ret_text;
    }
    
    return NULL;
}