path: root/em-format/e-mail-parser-message-external.c

/*
 * e-mail-parser-message-external.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.
 *
 * 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 Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 */

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

#include <string.h>
#include <ctype.h>
#include <glib/gi18n-lib.h>

#include <e-util/e-util.h>

#include "e-mail-parser-extension.h"

typedef EMailParserExtension EMailParserMessageExternal;
typedef EMailParserExtensionClass EMailParserMessageExternalClass;

GType e_mail_parser_message_external_get_type (void);

G_DEFINE_TYPE (
    EMailParserMessageExternal,
    e_mail_parser_message_external,
    E_TYPE_MAIL_PARSER_EXTENSION)

static const gchar *parser_mime_types[] = {
    "message/external-body",
    NULL
};

static gboolean
empe_msg_external_parse (EMailParserExtension *extension,
                         EMailParser *parser,
                         CamelMimePart *part,
                         GString *part_id,
                         GCancellable *cancellable,
                         GQueue *out_mail_parts)
{
    EMailPart *mail_part;
    CamelMimePart *newpart;
    CamelContentType *type;
    const gchar *access_type;
    const gchar *mime_type;
    gchar *url = NULL, *desc = NULL;
    gchar *content;
    gint len;

    newpart = camel_mime_part_new ();

    /* needs to be cleaner */
    type = camel_mime_part_get_content_type (part);
    access_type = camel_content_type_param (type, "access-type");
    if (!access_type) {
        const gchar *msg = _("Malformed external-body part");
        mime_type = "text/plain";
        camel_mime_part_set_content (
            newpart, msg, strlen (msg), mime_type);
        goto addPart;
    }

    if (!g_ascii_strcasecmp (access_type, "ftp") ||
        !g_ascii_strcasecmp (access_type, "anon-ftp")) {
        const gchar *name, *site, *dir, *mode;
        gchar *path;
        gchar ftype[16];

        name = camel_content_type_param (type, "name");
        site = camel_content_type_param (type, "site");
        dir = camel_content_type_param (type, "directory");
        mode = camel_content_type_param (type, "mode");
        if (name == NULL || site == NULL)
            goto fail;

        /* Generate the path. */
        if (dir)
            path = g_strdup_printf ("/%s/%s", *dir == '/' ? dir + 1 : dir, name);
        else
            path = g_strdup_printf ("/%s", *name == '/' ? name + 1 : name);

        if (mode && *mode)
            sprintf (ftype, ";type=%c",  *mode);
        else
            ftype[0] = 0;

        url = g_strdup_printf ("ftp://%s%s%s", site, path, ftype);
        g_free (path);
        desc = g_strdup_printf (_("Pointer to FTP site (%s)"), url);
    } else if (!g_ascii_strcasecmp (access_type, "local-file")) {
        const gchar *name, *site;

        name = camel_content_type_param (type, "name");
        site = camel_content_type_param (type, "site");
        if (name == NULL)
            goto fail;

        url = g_filename_to_uri (name, NULL, NULL);
        if (site)
            desc = g_strdup_printf (_("Pointer to local file (%s) valid at site \"%s\""), name, site);
        else
            desc = g_strdup_printf (_("Pointer to local file (%s)"), name);
    } else if (!g_ascii_strcasecmp (access_type, "URL")) {
        const gchar *urlparam;
        gchar *s, *d;

        /* RFC 2017 */
        urlparam = camel_content_type_param (type, "url");
        if (urlparam == NULL)
            goto fail;

        /* For obscure MIMEy reasons, the URL may be split into words */
        url = g_strdup (urlparam);
        s = d = url;
        while (*s) {
            if (!isspace ((guchar) * s))
                *d++ = *s;
            s++;
        }
        *d = 0;
        desc = g_strdup_printf (_("Pointer to remote data (%s)"), url);
    } else {
        goto fail;
    }

    mime_type = "text/html";
    content = g_strdup_printf ("<a href=\"%s\">%s</a>", url, desc);
    camel_mime_part_set_content (
        newpart, content, strlen (content), mime_type);
    g_free (content);

    g_free (url);
    g_free (desc);

    goto addPart;

fail:
    content = g_strdup_printf (
        _("Pointer to unknown external data (\"%s\" type)"),
        access_type);
    mime_type = "text/plain";
    camel_mime_part_set_content (
        newpart, content, strlen (content), mime_type);
    g_free (content);

addPart:
    len = part_id->len;
    g_string_append (part_id, ".msg_external");
    mail_part = e_mail_part_new (part, part_id->str);
    e_mail_part_set_mime_type (mail_part, mime_type);
    g_string_truncate (part_id, len);

    g_queue_push_tail (out_mail_parts, mail_part);

    return TRUE;
}

static void
e_mail_parser_message_external_class_init (EMailParserExtensionClass *class)
{
    class->mime_types = parser_mime_types;
    class->priority = G_PRIORITY_LOW;
    class->parse = empe_msg_external_parse;
}

static void
e_mail_parser_message_external_init (EMailParserExtension *extension)
{
}