path: root/em-format/e-mail-formatter-quote-headers.c

/*
 * e-mail-formatter-quote-headers.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 <glib/gi18n-lib.h>

#include <camel/camel.h>

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

#include "e-mail-formatter-quote.h"
#include "e-mail-formatter-utils.h"
#include "e-mail-inline-filter.h"
#include "e-mail-part-headers.h"

typedef EMailFormatterExtension EMailFormatterQuoteHeaders;
typedef EMailFormatterExtensionClass EMailFormatterQuoteHeadersClass;

GType e_mail_formatter_quote_headers_get_type (void);

G_DEFINE_TYPE (
    EMailFormatterQuoteHeaders,
    e_mail_formatter_quote_headers,
    E_TYPE_MAIL_FORMATTER_QUOTE_EXTENSION)

static const gchar *formatter_mime_types[] = {
    "application/vnd.evolution.headers",
    NULL
};

static void
emfqe_format_text_header (EMailFormatter *emf,
                          GString *buffer,
                          const gchar *label,
                          const gchar *value,
                          guint32 flags,
                          gint is_html)
{
    const gchar *html;
    gchar *mhtml = NULL;

    if (value == NULL)
        return;

    while (*value == ' ')
        value++;

    if (!is_html)
        html = mhtml = camel_text_to_html (value, 0, 0);
    else
        html = value;

    if (flags & E_MAIL_FORMATTER_HEADER_FLAG_BOLD)
        g_string_append_printf (
            buffer, "<b>%s</b>: %s<br>", label, html);
    else
        g_string_append_printf (
            buffer, "%s: %s<br>", label, html);

    g_free (mhtml);
}

/* XXX: This is copied in e-mail-formatter-utils.c */
static const gchar *addrspec_hdrs[] = {
    "Sender", "From", "Reply-To", "To", "Cc", "Bcc",
    "Resent-Sender", "Resent-From", "Resent-Reply-To",
    "Resent-To", "Resent-Cc", "Resent-Bcc", NULL
};

static void
emfqe_format_header (EMailFormatter *formatter,
                     GString *buffer,
                     EMailPart *part,
                     const gchar *header_name,
                     const gchar *charset)
{
    CamelMimePart *mime_part;
    EMailFormatterHeaderFlags flags;
    gchar *canon_name, *buf, *value = NULL;
    const gchar *txt, *label;
    gboolean addrspec = FALSE;
    gint is_html = FALSE;
    gint i;

    flags = E_MAIL_FORMATTER_HEADER_FLAG_NOELIPSIZE;

    canon_name = g_alloca (strlen (header_name) + 1);
    strcpy (canon_name, header_name);
    e_mail_formatter_canon_header_name (canon_name);

    /* Never quote Bcc/Resent-Bcc headers. */
    if (g_str_equal (canon_name, "Bcc"))
        return;
    if (g_str_equal (canon_name, "Resent-Bcc"))
        return;

    mime_part = e_mail_part_ref_mime_part (part);

    for (i = 0; addrspec_hdrs[i]; i++) {
        if (g_str_equal (canon_name, addrspec_hdrs[i])) {
            addrspec = TRUE;
            break;
        }
    }

    label = _(canon_name);

    if (addrspec) {
        CamelMedium *medium;
        struct _camel_header_address *addrs;
        GString *html;
        gchar *charset;

        medium = CAMEL_MEDIUM (mime_part);
        txt = camel_medium_get_header (medium, canon_name);
        if (txt == NULL)
            return;

        charset = e_mail_formatter_dup_charset (formatter);
        if (!charset)
            charset = e_mail_formatter_dup_default_charset (formatter);

        buf = camel_header_unfold (txt);
        addrs = camel_header_address_decode (txt, charset);
        g_free (charset);

        if (addrs == NULL) {
            g_free (buf);
            return;
        }

        g_free (buf);

        html = g_string_new ("");
        e_mail_formatter_format_address (formatter, html,
            addrs, canon_name, FALSE, FALSE);
        camel_header_address_unref (addrs);
        txt = value = html->str;
        g_string_free (html, FALSE);
        flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;
        is_html = TRUE;

    } else if (g_str_equal (canon_name, "Subject")) {
        CamelMimeMessage *message;

        message = CAMEL_MIME_MESSAGE (mime_part);
        txt = camel_mime_message_get_subject (message);
        label = _("Subject");
        flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;

    } else if (g_str_equal (canon_name, "X-Evolution-Mailer")) {
        CamelMedium *medium;

        medium = CAMEL_MEDIUM (mime_part);
        txt = camel_medium_get_header (medium, "x-mailer");
        if (txt == NULL)
            txt = camel_medium_get_header (medium, "user-agent");
        if (txt == NULL)
            txt = camel_medium_get_header (medium, "x-newsreader");
        if (txt == NULL)
            txt = camel_medium_get_header (medium, "x-mimeole");
        if (txt == NULL)
            return;

        txt = value = camel_header_format_ctext (txt, charset);

        label = _("Mailer");
        flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;

    } else if (g_str_equal (canon_name, "Date") ||
           g_str_equal (canon_name, "Resent-Date")) {
        CamelMedium *medium;

        medium = CAMEL_MEDIUM (mime_part);
        txt = camel_medium_get_header (medium, canon_name);
        if (txt == NULL)
            return;

        flags |= E_MAIL_FORMATTER_HEADER_FLAG_BOLD;

    } else {
        CamelMedium *medium;

        medium = CAMEL_MEDIUM (mime_part);
        txt = camel_medium_get_header (medium, canon_name);
        buf = camel_header_unfold (txt);
        txt = value = camel_header_decode_string (txt, charset);
        g_free (buf);
    }

    emfqe_format_text_header (formatter, buffer, label, txt, flags, is_html);

    g_free (value);

    g_object_unref (mime_part);
}

static gboolean
emqfe_headers_format (EMailFormatterExtension *extension,
                      EMailFormatter *formatter,
                      EMailFormatterContext *context,
                      EMailPart *part,
                      GOutputStream *stream,
                      GCancellable *cancellable)
{
    CamelContentType *ct;
    CamelMimePart *mime_part;
    const gchar *charset;
    GString *buffer;
    gchar **default_headers;
    guint ii, length = 0;

    g_return_val_if_fail (E_IS_MAIL_PART_HEADERS (part), FALSE);

    mime_part = e_mail_part_ref_mime_part (part);

    ct = camel_mime_part_get_content_type (mime_part);
    charset = camel_content_type_param (ct, "charset");
    charset = camel_iconv_charset_name (charset);

    buffer = g_string_new ("");

    /* dump selected headers */

    default_headers = e_mail_part_headers_dup_default_headers (
        E_MAIL_PART_HEADERS (part));
    if (default_headers != NULL)
        length = g_strv_length (default_headers);

    for (ii = 0; ii < length; ii++)
        emfqe_format_header (
            formatter, buffer, part,
            default_headers[ii], charset);

    g_strfreev (default_headers);

    g_string_append (buffer, "<br>\n");

    g_output_stream_write_all (
        stream, buffer->str, buffer->len, NULL, cancellable, NULL);

    g_string_free (buffer, TRUE);

    g_object_unref (mime_part);

    return TRUE;
}

static void
e_mail_formatter_quote_headers_class_init (EMailFormatterExtensionClass *class)
{
    class->mime_types = formatter_mime_types;
    class->priority = G_PRIORITY_HIGH;
    class->format = emqfe_headers_format;
}

static void
e_mail_formatter_quote_headers_init (EMailFormatterExtension *extension)
{
}