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/*
** Copyright (C) 2011-2016 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
**
** 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**
*/
#include <string.h>
#include <ctype.h>
#include "mu-str.h"
#include "mu-msg.h"
#include "mu-msg-iter.h"
#include "mu-msg-part.h"
#include "mu-maildir.h"
static void
append_sexp_attr_list (GString *gstr, const char* elm, const GSList *lst)
{
const GSList *cur;
if (!lst)
return; /* empty list, don't include */
g_string_append_printf (gstr, "\t:%s ( ", elm);
for (cur = lst; cur; cur = g_slist_next(cur)) {
char *str;
str = mu_str_escape_c_literal
((const gchar*)cur->data, TRUE);
g_string_append_printf (gstr, "%s ", str);
g_free (str);
}
g_string_append (gstr, ")\n");
}
static void
append_sexp_attr (GString *gstr, const char* elm, const char *str)
{
gchar *esc, *utf8, *cur;
if (!str || strlen(str) == 0)
return; /* empty: don't include */
utf8 = mu_str_utf8ify (str);
for (cur = utf8; *cur; ++cur)
if (iscntrl(*cur))
*cur = ' ';
esc = mu_str_escape_c_literal (utf8, TRUE);
g_free (utf8);
g_string_append_printf (gstr, "\t:%s %s\n", elm, esc);
g_free (esc);
}
static void
append_sexp_body_attr (GString *gstr, const char* elm, const char *str)
{
gchar *esc;
if (!str || strlen(str) == 0)
return; /* empty: don't include */
esc = mu_str_escape_c_literal (str, TRUE);
g_string_append_printf (gstr, "\t:%s %s\n", elm, esc);
g_free (esc);
}
struct _ContactData {
gboolean from, to, cc, bcc, reply_to;
GString *gstr;
MuMsgContactType prev_ctype;
};
typedef struct _ContactData ContactData;
static gchar*
get_name_addr_pair (MuMsgContact *c)
{
gchar *name, *addr, *pair;
name = (char*)mu_msg_contact_name(c);
addr = (char*)mu_msg_contact_address(c);
name = name ? mu_str_escape_c_literal (name, TRUE) : NULL;
addr = addr ? mu_str_escape_c_literal (addr, TRUE) : NULL;
pair = g_strdup_printf ("(%s . %s)",
name ? name : "nil",
addr ? addr : "nil");
g_free (name);
g_free (addr);
return pair;
}
static void
add_prefix_maybe (GString *gstr, gboolean *field, const char *prefix)
{
/* if there's nothing in the field yet, add the prefix */
if (!*field)
g_string_append (gstr, prefix);
*field = TRUE;
}
static gboolean
each_contact (MuMsgContact *c, ContactData *cdata)
{
char *pair;
MuMsgContactType ctype;
ctype = mu_msg_contact_type (c);
/* if the current type is not the previous type, close the
* previous first */
if (cdata->prev_ctype != ctype && cdata->prev_ctype != (unsigned)-1)
g_string_append (cdata->gstr, ")\n");
switch (ctype) {
case MU_MSG_CONTACT_TYPE_FROM:
add_prefix_maybe (cdata->gstr, &cdata->from, "\t:from (");
break;
case MU_MSG_CONTACT_TYPE_TO:
add_prefix_maybe (cdata->gstr, &cdata->to, "\t:to (");
break;
case MU_MSG_CONTACT_TYPE_CC:
add_prefix_maybe (cdata->gstr, &cdata->cc, "\t:cc (");
break;
case MU_MSG_CONTACT_TYPE_BCC:
add_prefix_maybe (cdata->gstr, &cdata->bcc, "\t:bcc (");
break;
case MU_MSG_CONTACT_TYPE_REPLY_TO:
add_prefix_maybe (cdata->gstr, &cdata->reply_to,
"\t:reply-to (");
break;
default: g_return_val_if_reached (FALSE);
}
cdata->prev_ctype = ctype;
pair = get_name_addr_pair (c);
g_string_append (cdata->gstr, pair);
g_free (pair);
return TRUE;
}
static void
append_sexp_contacts (GString *gstr, MuMsg *msg)
{
ContactData cdata;
cdata.from = cdata.to = cdata.cc = cdata.bcc
= cdata.reply_to = FALSE;
cdata.gstr = gstr;
cdata.prev_ctype = (unsigned)-1;
mu_msg_contact_foreach (msg, (MuMsgContactForeachFunc)each_contact,
&cdata);
if (cdata.from || cdata.to || cdata.cc || cdata.bcc || cdata.reply_to)
gstr = g_string_append (gstr, ")\n");
}
struct _FlagData {
char *flagstr;
MuFlags msgflags;
};
typedef struct _FlagData FlagData;
static void
each_flag (MuFlags flag, FlagData *fdata)
{
if (!(flag & fdata->msgflags))
return;
if (!fdata->flagstr)
fdata->flagstr = g_strdup (mu_flag_name(flag));
else {
gchar *tmp;
tmp = g_strconcat (fdata->flagstr, " ",
mu_flag_name(flag), NULL);
g_free (fdata->flagstr);
fdata->flagstr = tmp;
}
}
static void
append_sexp_flags (GString *gstr, MuMsg *msg)
{
FlagData fdata;
fdata.msgflags = mu_msg_get_flags (msg);
fdata.flagstr = NULL;
mu_flags_foreach ((MuFlagsForeachFunc)each_flag, &fdata);
if (fdata.flagstr)
g_string_append_printf (gstr, "\t:flags (%s)\n",
fdata.flagstr);
g_free (fdata.flagstr);
}
static char*
get_temp_file (MuMsg *msg, MuMsgOptions opts, unsigned index)
{
char *path;
GError *err;
err = NULL;
path = mu_msg_part_get_cache_path (msg, opts, index, &err);
if (!path)
goto errexit;
if (!mu_msg_part_save (msg, opts, path, index, &err))
goto errexit;
return path;
errexit:
g_warning ("failed to save mime part: %s",
err->message ? err->message : "something went wrong");
g_clear_error (&err);
g_free (path);
return NULL;
}
static gchar*
get_temp_file_maybe (MuMsg *msg, MuMsgPart *part, MuMsgOptions opts)
{
char *tmp, *tmpfile;
opts |= MU_MSG_OPTION_USE_EXISTING;
if (!(opts & MU_MSG_OPTION_EXTRACT_IMAGES) ||
g_ascii_strcasecmp (part->type, "image") != 0)
return NULL;
tmp = get_temp_file (msg, opts, part->index);
if (!tmp)
return NULL;
tmpfile = mu_str_escape_c_literal (tmp, TRUE);
g_free (tmp);
return tmpfile;
}
struct _PartInfo {
char *parts;
MuMsgOptions opts;
};
typedef struct _PartInfo PartInfo;
static const char*
sig_verdict (MuMsgPart *mpart)
{
MuMsgPartSigStatusReport *report;
report = mpart->sig_status_report;
if (!report)
return "";
switch (report->verdict) {
case MU_MSG_PART_SIG_STATUS_GOOD:
return ":signature verified";
case MU_MSG_PART_SIG_STATUS_BAD:
return ":signature bad";
case MU_MSG_PART_SIG_STATUS_ERROR:
return ":signature unverified";
default:
return "";
}
}
static const char*
dec_verdict (MuMsgPart *mpart)
{
MuMsgPartType ptype;
ptype = mpart->part_type;
if (ptype & MU_MSG_PART_TYPE_DECRYPTED)
return ":decryption succeeded";
else if (ptype & MU_MSG_PART_TYPE_ENCRYPTED)
return ":decryption failed";
else
return "";
}
static gchar *
get_part_type_string (MuMsgPartType ptype)
{
GString *gstr;
unsigned u;
struct PartTypes {
MuMsgPartType ptype;
const char* name;
} ptypes[] = {
{ MU_MSG_PART_TYPE_LEAF, "leaf" },
{ MU_MSG_PART_TYPE_MESSAGE, "message" },
{ MU_MSG_PART_TYPE_INLINE, "inline" },
{ MU_MSG_PART_TYPE_ATTACHMENT, "attachment" },
{ MU_MSG_PART_TYPE_SIGNED, "signed" },
{ MU_MSG_PART_TYPE_ENCRYPTED, "encrypted" }
};
gstr = g_string_sized_new (100); /* more than enough */
gstr = g_string_append_c (gstr, '(');
for (u = 0; u!= G_N_ELEMENTS(ptypes); ++u) {
if (ptype & ptypes[u].ptype) {
if (gstr->len > 1)
gstr = g_string_append_c (gstr, ' ');
gstr = g_string_append (gstr, ptypes[u].name);
}
}
gstr = g_string_append_c (gstr, ')');
return g_string_free (gstr, FALSE);
}
static void
each_part (MuMsg *msg, MuMsgPart *part, PartInfo *pinfo)
{
char *name, *tmp, *parttype;
char *tmpfile, *cid;
name = mu_msg_part_get_filename (part, TRUE);
tmpfile = get_temp_file_maybe (msg, part, pinfo->opts);
parttype = get_part_type_string (part->part_type);
cid = mu_str_escape_c_literal(mu_msg_part_get_content_id(part), TRUE);
tmp = g_strdup_printf
("%s(:index %d :name \"%s\" :mime-type \"%s/%s\"%s%s "
":type %s "
":attachment %s %s%s :size %i %s %s)",
pinfo->parts ? pinfo->parts: "",
part->index,
name ? mu_str_escape_c_literal(name, FALSE) : "noname",
part->type ? part->type : "application",
part->subtype ? part->subtype : "octet-stream",
tmpfile ? " :temp" : "", tmpfile ? tmpfile : "",
parttype,
mu_msg_part_maybe_attachment (part) ? "t" : "nil",
cid ? " :cid" : "", cid ? cid : "",
(int)part->size,
sig_verdict (part),
dec_verdict (part));
g_free (name);
g_free (tmpfile);
g_free (parttype);
g_free (cid);
g_free (pinfo->parts);
pinfo->parts = tmp;
}
static void
append_sexp_parts (GString *gstr, MuMsg *msg, MuMsgOptions opts)
{
PartInfo pinfo;
pinfo.parts = NULL;
pinfo.opts = opts;
if (!mu_msg_part_foreach (msg, opts, (MuMsgPartForeachFunc)each_part,
&pinfo)) {
/* do nothing */
} else if (pinfo.parts) {
g_string_append_printf (gstr, "\t:parts (%s)\n", pinfo.parts);
g_free (pinfo.parts);
}
}
static void
append_sexp_thread_info (GString *gstr, const MuMsgIterThreadInfo *ti)
{
g_string_append_printf
(gstr, "\t:thread (:path \"%s\" :level %u%s%s%s%s)\n",
ti->threadpath,
ti->level,
ti->prop & MU_MSG_ITER_THREAD_PROP_FIRST_CHILD ?
" :first-child t" : "",
ti->prop & MU_MSG_ITER_THREAD_PROP_EMPTY_PARENT ?
" :empty-parent t" : "",
ti->prop & MU_MSG_ITER_THREAD_PROP_DUP ?
" :duplicate t" : "",
ti->prop & MU_MSG_ITER_THREAD_PROP_HAS_CHILD ?
" :has-child t" : "");
}
static void
append_message_file_parts (GString *gstr, MuMsg *msg, MuMsgOptions opts)
{
const char *str;
GError *err;
err = NULL;
if (!mu_msg_load_msg_file (msg, &err)) {
g_warning ("failed to load message file: %s",
err ? err->message : "some error occured");
g_clear_error (&err);
return;
}
append_sexp_parts (gstr, msg, opts);
append_sexp_contacts (gstr, msg);
/* add the user-agent / x-mailer */
str = mu_msg_get_header (msg, "User-Agent");
if (str || (str = mu_msg_get_header (msg, "X-Mailer")))
append_sexp_attr (gstr, "user-agent", str);
append_sexp_body_attr (gstr, "body-txt",
mu_msg_get_body_text(msg, opts));
append_sexp_body_attr (gstr, "body-html",
mu_msg_get_body_html(msg, opts));
}
static void
append_sexp_date_and_size (GString *gstr, MuMsg *msg)
{
time_t t;
size_t s;
t = mu_msg_get_date (msg);
if (t == (time_t)-1) /* invalid date? */
t = 0;
s = mu_msg_get_size (msg);
if (s == (size_t)-1) /* invalid size? */
s = 0;
g_string_append_printf
(gstr,
"\t:date (%u %u 0)\n\t:size %u\n",
(unsigned)(t >> 16),
(unsigned)(t & 0xffff),
(unsigned)s);
}
static void
append_sexp_tags (GString *gstr, MuMsg *msg)
{
const GSList *tags, *t;
gchar *tagesc;
GString *tagstr = g_string_new("");
tags = mu_msg_get_tags (msg);
for(t = tags; t; t = t->next) {
if (t != tags)
g_string_append(tagstr, " ");
tagesc = mu_str_escape_c_literal((const gchar *)t->data, TRUE);
g_string_append(tagstr, tagesc);
g_free(tagesc);
}
if (tagstr->len > 0)
g_string_append_printf (gstr, "\t:tags (%s)\n",
tagstr->str);
g_string_free (tagstr, TRUE);
}
char*
mu_msg_to_sexp (MuMsg *msg, unsigned docid, const MuMsgIterThreadInfo *ti,
MuMsgOptions opts)
{
GString *gstr;
g_return_val_if_fail (msg, NULL);
g_return_val_if_fail (!((opts & MU_MSG_OPTION_HEADERS_ONLY) &&
(opts & MU_MSG_OPTION_EXTRACT_IMAGES)),NULL);
gstr = g_string_sized_new
((opts & MU_MSG_OPTION_HEADERS_ONLY) ? 1024 : 8192);
if (docid == 0)
g_string_append (gstr, "(\n");
else
g_string_append_printf (gstr, "(\n\t:docid %u\n", docid);
if (ti)
append_sexp_thread_info (gstr, ti);
append_sexp_attr (gstr, "subject", mu_msg_get_subject (msg));
/* in the no-headers-only case (see below) we get a more
* complete list of contacts, so no need to get them here if
* that's the case */
if (opts & MU_MSG_OPTION_HEADERS_ONLY)
append_sexp_contacts (gstr, msg);
append_sexp_date_and_size (gstr, msg);
append_sexp_attr (gstr, "message-id", mu_msg_get_msgid (msg));
append_sexp_attr (gstr, "mailing-list",
mu_msg_get_mailing_list (msg));
append_sexp_attr (gstr, "path", mu_msg_get_path (msg));
append_sexp_attr (gstr, "maildir", mu_msg_get_maildir (msg));
g_string_append_printf (gstr, "\t:priority %s\n",
mu_msg_prio_name(mu_msg_get_prio(msg)));
append_sexp_flags (gstr, msg);
append_sexp_tags (gstr, msg);
append_sexp_attr_list (gstr, "references",
mu_msg_get_references (msg));
append_sexp_attr (gstr, "in-reply-to",
mu_msg_get_header (msg, "In-Reply-To"));
/* headers are retrieved from the database, views from the
* message file file attr things can only be gotten from the
* file (ie., mu view), not from the database (mu find). */
if (!(opts & MU_MSG_OPTION_HEADERS_ONLY))
append_message_file_parts (gstr, msg, opts);
g_string_append (gstr, ")\n");
return g_string_free (gstr, FALSE);
}