path: root/mail/mail-tools.c

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Dan Winship <danw@ximian.com>
 *      Peter Williams <peterw@ximian.com>
 *      Jeffrey Stedfast <fejj@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>

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

#include <glib/gi18n.h>

#include "em-utils.h"
#include "mail-folder-cache.h"
#include "mail-session.h"
#include "mail-tools.h"

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

CamelFolder *
mail_tool_get_inbox (const gchar *url, GError **error)
{
    CamelStore *store;
    CamelFolder *folder;

    store = camel_session_get_store (session, url, error);
    if (!store)
        return NULL;

    folder = camel_store_get_inbox (store, error);
    g_object_unref (store);

    return folder;
}

static gboolean
is_local_provider (CamelStore *store)
{
    CamelProvider *provider;

    g_return_val_if_fail (store != NULL, FALSE);

    provider = camel_service_get_provider (CAMEL_SERVICE (store));

    g_return_val_if_fail (provider != NULL, FALSE);

    return (provider->flags & CAMEL_PROVIDER_IS_LOCAL) != 0;
}

CamelFolder *
mail_tool_get_trash (const gchar *url,
                     gint connect,
                     GError **error)
{
    CamelStore *store;
    CamelFolder *trash;

    if (connect)
        store = camel_session_get_store (session, url, error);
    else
        store = (CamelStore *) camel_session_get_service (
            session, url, CAMEL_PROVIDER_STORE, error);

    if (!store)
        return NULL;

    if (connect ||
        (CAMEL_SERVICE (store)->status == CAMEL_SERVICE_CONNECTED ||
        is_local_provider (store)))
        trash = camel_store_get_trash (store, error);
    else
        trash = NULL;

    g_object_unref (store);

    return trash;
}

#ifndef G_OS_WIN32

static gchar *
mail_tool_get_local_movemail_path (const guchar *uri,
                                   GError **error)
{
    guchar *safe_uri, *c;
    const gchar *data_dir;
    gchar *path, *full;
    struct stat st;

    safe_uri = (guchar *)g_strdup ((const gchar *)uri);
    for (c = safe_uri; *c; c++)
        if (strchr("/:;=|%&#!*^()\\, ", *c) || !isprint((gint) *c))
            *c = '_';

    data_dir = mail_session_get_data_dir ();
    path = g_build_filename (data_dir, "spool", NULL);

    if (g_stat (path, &st) == -1 && g_mkdir_with_parents (path, 0700) == -1) {
        g_set_error (
            error, G_FILE_ERROR,
            g_file_error_from_errno (errno),
            _("Could not create spool directory '%s': %s"),
            path, g_strerror (errno));
        g_free (path);
        return NULL;
    }

    full = g_strdup_printf("%s/movemail.%s", path, safe_uri);
    g_free (path);
    g_free (safe_uri);

    return full;
}

#endif

gchar *
mail_tool_do_movemail (const gchar *source_url, GError **error)
{
#ifndef G_OS_WIN32
    gchar *dest_path;
    struct stat sb;
    CamelURL *uri;
    gboolean success;

    uri = camel_url_new (source_url, error);
    if (uri == NULL)
        return NULL;

    if (strcmp(uri->protocol, "mbox") != 0) {
        /* This is really only an internal error anyway */
        g_set_error (
            error, CAMEL_SERVICE_ERROR,
            CAMEL_SERVICE_ERROR_URL_INVALID,
            _("Trying to movemail a non-mbox source '%s'"),
            source_url);
        camel_url_free (uri);
        return NULL;
    }

    /* Set up our destination. */
    dest_path = mail_tool_get_local_movemail_path (
        (guchar *) source_url, error);
    if (dest_path == NULL)
        return NULL;

    /* Movemail from source (source_url) to dest_path */
    success = camel_movemail (uri->path, dest_path, error) != -1;
    camel_url_free (uri);

    if (g_stat (dest_path, &sb) < 0 || sb.st_size == 0) {
        g_unlink (dest_path); /* Clean up the movemail.foo file. */
        g_free (dest_path);
        return NULL;
    }

    if (!success) {
        g_free (dest_path);
        return NULL;
    }

    return dest_path;
#else
    /* Unclear yet whether camel-movemail etc makes any sense on
     * Win32, at least it is not ported yet.
     */
    g_warning("%s: Not implemented", __FUNCTION__);
    return NULL;
#endif
}

gchar *
mail_tool_generate_forward_subject (CamelMimeMessage *msg)
{
    const gchar *subject;
    gchar *fwd_subj;
    const gint max_subject_length = 1024;

    subject = camel_mime_message_get_subject (msg);

    if (subject && *subject) {
        /* Truncate insanely long subjects */
        if (strlen (subject) < max_subject_length) {
            fwd_subj = g_strdup_printf ("[Fwd: %s]", subject);
        } else {
            /* We can't use %.*s because it depends on the locale being C/POSIX
               or UTF-8 to work correctly in glibc */
            /*fwd_subj = g_strdup_printf ("[Fwd: %.*s...]", max_subject_length, subject);*/
            fwd_subj = g_malloc (max_subject_length + 11);
            memcpy (fwd_subj, "[Fwd: ", 6);
            memcpy (fwd_subj + 6, subject, max_subject_length);
            memcpy (fwd_subj + 6 + max_subject_length, "...]", 5);
        }
    } else {
        const CamelInternetAddress *from;
        gchar *fromstr;

        from = camel_mime_message_get_from (msg);
        if (from) {
            fromstr = camel_address_format (CAMEL_ADDRESS (from));
            fwd_subj = g_strdup_printf ("[Fwd: %s]", fromstr);
            g_free (fromstr);
        } else
            fwd_subj = g_strdup ("[Fwd: No Subject]");
    }

    return fwd_subj;
}

struct _camel_header_raw *
mail_tool_remove_xevolution_headers (CamelMimeMessage *message)
{
    struct _camel_header_raw *scan, *list = NULL;

    for (scan = ((CamelMimePart *)message)->headers;scan;scan=scan->next)
        if (!strncmp(scan->name, "X-Evolution", 11))
            camel_header_raw_append (&list, scan->name, scan->value, scan->offset);

    for (scan=list;scan;scan=scan->next)
        camel_medium_remove_header ((CamelMedium *)message, scan->name);

    return list;
}

void
mail_tool_restore_xevolution_headers (CamelMimeMessage *message,
                                      struct _camel_header_raw *xev)
{
    CamelMedium *medium;

    medium = CAMEL_MEDIUM (message);

    for (;xev;xev=xev->next)
        camel_medium_add_header (medium, xev->name, xev->value);
}

CamelMimePart *
mail_tool_make_message_attachment (CamelMimeMessage *message)
{
    CamelMimePart *part;
    const gchar *subject;
    struct _camel_header_raw *xev;
    gchar *desc;

    subject = camel_mime_message_get_subject (message);
    if (subject)
        desc = g_strdup_printf (_("Forwarded message - %s"), subject);
    else
        desc = g_strdup (_("Forwarded message"));

    /* rip off the X-Evolution headers */
    xev = mail_tool_remove_xevolution_headers (message);
    camel_header_raw_clear (&xev);

    /* remove Bcc headers */
    camel_medium_remove_header (CAMEL_MEDIUM (message), "Bcc");

    part = camel_mime_part_new ();
    camel_mime_part_set_disposition (part, "inline");
    camel_mime_part_set_description (part, desc);
    camel_medium_set_content (
        CAMEL_MEDIUM (part), CAMEL_DATA_WRAPPER (message));
    camel_mime_part_set_content_type (part, "message/rfc822");
    g_free (desc);

    return part;
}

CamelFolder *
mail_tool_uri_to_folder (const gchar *uri, guint32 flags, GError **error)
{
    CamelURL *url;
    CamelStore *store = NULL;
    CamelFolder *folder = NULL;
    gint offset = 0;
    gchar *curi = NULL;

    g_return_val_if_fail (uri != NULL, NULL);

    /* TODO: vtrash and vjunk are no longer used for these uri's */
    if (!strncmp (uri, "vtrash:", 7))
        offset = 7;
    else if (!strncmp (uri, "vjunk:", 6))
        offset = 6;
    else if (!strncmp(uri, "email:", 6)) {
        /* FIXME?: the filter:get_folder callback should do this itself? */
        curi = em_uri_to_camel (uri);
        if (uri == NULL) {
            g_set_error (
                error,
                CAMEL_ERROR, CAMEL_ERROR_GENERIC,
                _("Invalid folder: '%s'"), uri);
            return NULL;
        }
        uri = curi;
    }

    url = camel_url_new (uri + offset, error);
    if (!url) {
        g_free (curi);
        return NULL;
    }

    store = (CamelStore *) camel_session_get_service (
        session, uri + offset, CAMEL_PROVIDER_STORE, error);
    if (store) {
        const gchar *name;

        /* if we have a fragment, then the path is actually used by the store,
           so the fragment is the path to the folder instead */
        if (url->fragment) {
            name = url->fragment;
        } else {
            if (url->path && *url->path)
                name = url->path + 1;
            else
                name = "";
        }

        if (offset) {
            if (offset == 7)
                folder = camel_store_get_trash (store, error);
            else if (offset == 6)
                folder = camel_store_get_junk (store, error);
        } else
            folder = camel_store_get_folder (store, name, flags, error);
        g_object_unref (store);
    }

    if (folder)
        mail_folder_cache_note_folder (mail_folder_cache_get_default (), folder);

    camel_url_free (url);
    g_free (curi);

    return folder;
}

/**
 * mail_tools_x_evolution_message_parse:
 * @in: GtkSelectionData->data
 * @inlen: GtkSelectionData->length
 * @uids: pointer to a gptrarray that will be filled with uids on success
 *
 * Parses the GtkSelectionData and returns a CamelFolder and a list of
 * UIDs specified by the selection.
 **/
CamelFolder *
mail_tools_x_evolution_message_parse (gchar *in, guint inlen, GPtrArray **uids)
{
    /* format: "uri\0uid1\0uid2\0uid3\0...\0uidn" */
    gchar *inptr, *inend;
    CamelFolder *folder;

    if (in == NULL)
        return NULL;

    folder = mail_tool_uri_to_folder (in, 0, NULL);

    if (!folder)
        return NULL;

    /* split the uids */
    inend = in + inlen;
    inptr = in + strlen (in) + 1;
    *uids = g_ptr_array_new ();
    while (inptr < inend) {
        gchar *start = inptr;

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

        g_ptr_array_add (*uids, g_strndup (start, inptr - start));
        inptr++;
    }

    return folder;
}

/* FIXME: This should be a property on CamelFolder */
gchar *
mail_tools_folder_to_url (CamelFolder *folder)
{
    CamelService *service;
    CamelStore *parent_store;
    const gchar *full_name;
    CamelURL *url;
    gchar *out;

    g_return_val_if_fail (CAMEL_IS_FOLDER (folder), NULL);

    full_name = camel_folder_get_full_name (folder);
    parent_store = camel_folder_get_parent_store (folder);
    service = CAMEL_SERVICE (parent_store);

    url = camel_url_copy (service->url);
    if (service->provider->url_flags  & CAMEL_URL_FRAGMENT_IS_PATH) {
        camel_url_set_fragment (url, full_name);
    } else {
        gchar *name = g_alloca (strlen (full_name)+2);

        sprintf(name, "/%s", full_name);
        camel_url_set_path (url, name);
    }

    out = camel_url_to_string (url, CAMEL_URL_HIDE_ALL);
    camel_url_free (url);

    return out;
}