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mu/lib/mu-msg-sexp.cc

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/*
** Copyright (C) 2011-2020 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 "utils/mu-str.h"
#include "mu-msg.h"
#include "mu-msg-iter.h"
#include "mu-msg-part.h"
#include "mu-maildir.h"
using namespace Mu;
using namespace Sexp;
static void
add_prop_nonempty (Node::Seq& items, const char* elm, const GSList *str_lst)
{
Node::Seq elms;
while (str_lst) {
elms.add((const char*)str_lst->data);
str_lst = g_slist_next(str_lst);
}
if (!elms.empty())
items.add_prop(elm, elms);
}
static void
add_prop_nonempty (Node::Seq& items, const char* elm, Node::Seq&& seq)
{
if (!seq.empty())
items.add_prop(elm, std::move(seq));
}
static void
add_prop_nonempty (Node::Seq& items, const char* name, const char *str)
{
if (str && str[0])
items.add_prop(name, str);
}
static void
add_prop_symbol (Node::Seq& items, const char* name, const char *str)
{
items.add_prop(name, Node::make_symbol(str));
}
static Node
make_contact_node (MuMsgContact *c)
{
// a cons-pair...perhaps make this a plist too?
Node::Seq contact;
if (mu_msg_contact_name(c))
contact.add (mu_msg_contact_name(c));
else
contact.add (Node::make_symbol("nil"));
contact.add(Node::make_symbol("."));
contact.add(mu_msg_contact_email(c));
return Node::make_list(std::move(contact));
}
static void
add_list_post (Node::Seq& items, MuMsg *msg)
{
/* some mailing lists do not set the reply-to; see pull #1278. So for
* those cases, check the List-Post address and use that instead */
GMatchInfo *minfo;
GRegex *rx;
const char* list_post;
list_post = mu_msg_get_header (msg, "List-Post");
if (!list_post)
return;
rx = g_regex_new ("<?mailto:([a-z0-9%+@._-]+)>?", G_REGEX_CASELESS,
(GRegexMatchFlags)0, NULL);
g_return_if_fail(rx);
Node::Seq addrs;
if (g_regex_match (rx, list_post, (GRegexMatchFlags)0, &minfo)) {
auto address = (char*)g_match_info_fetch (minfo, 1);
MuMsgContact contact{NULL, address};
addrs.add(make_contact_node(&contact));
items.add_prop(":list-post", std::move(addrs));
g_free(address);
}
g_match_info_free (minfo);
g_regex_unref (rx);
}
struct _ContactData {
Node::Seq from, to, cc, bcc, reply_to;
};
typedef struct _ContactData ContactData;
static gboolean
each_contact (MuMsgContact *c, ContactData *cdata)
{
switch (mu_msg_contact_type (c)) {
case MU_MSG_CONTACT_TYPE_FROM:
cdata->from.add(make_contact_node(c));
break;
case MU_MSG_CONTACT_TYPE_TO:
cdata->to.add(make_contact_node(c));
break;
case MU_MSG_CONTACT_TYPE_CC:
cdata->cc.add(make_contact_node(c));
break;
case MU_MSG_CONTACT_TYPE_BCC:
cdata->bcc.add(make_contact_node(c));
break;
case MU_MSG_CONTACT_TYPE_REPLY_TO:
cdata->reply_to.add(make_contact_node(c));
break;
default:
g_return_val_if_reached (FALSE);
return FALSE;
}
return TRUE;
}
static void
add_contacts (Node::Seq& items, MuMsg *msg)
{
ContactData cdata{};
mu_msg_contact_foreach (msg, (MuMsgContactForeachFunc)each_contact,
&cdata);
add_prop_nonempty(items, ":from", std::move(cdata.from));
add_prop_nonempty(items, ":to", std::move(cdata.to));
add_prop_nonempty(items, ":cc", std::move(cdata.cc));
add_prop_nonempty(items, ":bcc", std::move(cdata.bcc));
add_prop_nonempty(items, ":reply-to", std::move(cdata.reply_to));
add_list_post (items, msg);
}
typedef struct {
Node::Seq flagseq;
MuFlags msgflags;
} FlagData;
static void
each_flag (MuFlags flag, FlagData *fdata)
{
if (flag & fdata->msgflags)
fdata->flagseq.add(Node::make_symbol(mu_flag_name(flag)));
}
static void
add_flags (Node::Seq& items, MuMsg *msg)
{
FlagData fdata{};
fdata.msgflags = mu_msg_get_flags (msg);
mu_flags_foreach ((MuFlagsForeachFunc)each_flag, &fdata);
add_prop_nonempty(items, ":flags", std::move(fdata.flagseq));
}
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)
{
opts = (MuMsgOptions)((int)opts | (int)MU_MSG_OPTION_USE_EXISTING);
if (!(opts & MU_MSG_OPTION_EXTRACT_IMAGES) ||
g_ascii_strcasecmp (part->type, "image") != 0)
return NULL;
else
return get_temp_file (msg, opts, part->index);
}
struct PartInfo {
Node::Seq parts;
MuMsgOptions opts;
};
static void
sig_verdict (Node::Seq& partseq, MuMsgPart *mpart)
{
MuMsgPartSigStatusReport *report = mpart->sig_status_report;
if (!report)
return;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wswitch-enum"
switch (report->verdict) {
case MU_MSG_PART_SIG_STATUS_GOOD:
add_prop_symbol (partseq, ":signature", "verified");
break;
case MU_MSG_PART_SIG_STATUS_BAD:
add_prop_symbol (partseq, ":signature", "bad");
break;
case MU_MSG_PART_SIG_STATUS_ERROR:
add_prop_symbol (partseq, ":signature", "unverified");
break;
default:
break;
}
#pragma GCC diagnostic pop
add_prop_nonempty (partseq, ":signers", report->signers);
}
static void
dec_verdict (Node::Seq& partseq, MuMsgPart *mpart)
{
if (mpart->part_type & MU_MSG_PART_TYPE_DECRYPTED)
partseq.add_prop(":decryption", Node::make_symbol("succeeded"));
else if (mpart->part_type & MU_MSG_PART_TYPE_ENCRYPTED)
partseq.add_prop(":decryption", Node::make_symbol("failed"));
}
static Node::Seq
make_part_types (MuMsgPartType ptype)
{
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" }
};
Node::Seq seq;
for (auto u = 0U; u!= G_N_ELEMENTS(ptypes); ++u)
if (ptype & ptypes[u].ptype)
seq.add(Node::make_symbol(ptypes[u].name));
return seq;
}
static void
each_part (MuMsg *msg, MuMsgPart *part, PartInfo *pinfo)
{
auto mimetype = format("%s/%s",
part->type ? part->type : "application",
part->subtype ? part->subtype : "octet-stream");
auto maybe_attach = Node::make_symbol(mu_msg_part_maybe_attachment (part) ?
"t" : "nil");
Node::Seq partseq;
partseq.add_prop(":index", part->index);
partseq.add_prop(":mime-type", mimetype);
partseq.add_prop(":size", part->size);
dec_verdict (partseq, part);
sig_verdict (partseq, part);
add_prop_nonempty(partseq, ":type", make_part_types(part->part_type));
char *fname = mu_msg_part_get_filename (part, TRUE);
add_prop_nonempty(partseq, ":name", fname);
g_free (fname);
if (mu_msg_part_maybe_attachment (part))
add_prop_symbol (partseq, ":attachment", "t");
add_prop_nonempty (partseq, ":cid", mu_msg_part_get_content_id(part));
char *tempfile = get_temp_file_maybe (msg, part, pinfo->opts);
add_prop_nonempty (partseq, ":temp", tempfile);
g_free (tempfile);
pinfo->parts.add(Node::make_list(std::move(partseq)));
}
static void
add_parts (Node::Seq& items, MuMsg *msg, MuMsgOptions opts)
{
PartInfo pinfo;
pinfo.opts = opts;
if (mu_msg_part_foreach (msg, opts, (MuMsgPartForeachFunc)each_part, &pinfo))
add_prop_nonempty (items, ":parts", std::move(pinfo.parts));
}
static void
add_thread_info (Node::Seq& items, const MuMsgIterThreadInfo *ti)
{
Node::Seq info;
info.add_prop(":path", ti->threadpath);
info.add_prop(":level", ti->level);
if (ti->prop & MU_MSG_ITER_THREAD_PROP_FIRST_CHILD)
add_prop_symbol(info, ":first-child", "t");
if (ti->prop & MU_MSG_ITER_THREAD_PROP_LAST_CHILD)
add_prop_symbol(info, ":last-child", "t");
if (ti->prop & MU_MSG_ITER_THREAD_PROP_EMPTY_PARENT)
add_prop_symbol(info, ":empty-parent", "t");
if (ti->prop & MU_MSG_ITER_THREAD_PROP_DUP)
add_prop_symbol(info, ":duplicate", "t");
if (ti->prop & MU_MSG_ITER_THREAD_PROP_HAS_CHILD)
add_prop_symbol(info, ":has-child", "t");
items.add_prop(":thread", std::move(info));
}
static void
add_message_file_parts (Node::Seq& items, MuMsg *msg, MuMsgOptions opts)
{
GError *err{NULL};
if (!mu_msg_load_msg_file (msg, &err)) {
g_warning ("failed to load message file: %s",
err ? err->message : "some error occurred");
g_clear_error (&err);
return;
}
add_parts (items, msg, opts);
add_contacts (items, msg);
/* add the user-agent / x-mailer */
auto str = mu_msg_get_header (msg, "User-Agent");
if (!str)
str = mu_msg_get_header (msg, "X-Mailer");
add_prop_nonempty (items, ":user-agent", str);
add_prop_nonempty (items, ":body-txt-params",
mu_msg_get_body_text_content_type_parameters (msg, opts));
add_prop_nonempty (items, ":body-txt", mu_msg_get_body_text(msg, opts));
add_prop_nonempty (items, ":body-html", mu_msg_get_body_html(msg, opts));
}
static void
add_date_and_size (Node::Seq& items, MuMsg *msg)
{
auto t = mu_msg_get_date (msg);
if (t == (time_t)-1) /* invalid date? */
t = 0;
Node::Seq dseq;
dseq.add((unsigned)(t >> 16));
dseq.add((unsigned)(t & 0xffff));
dseq.add(0);
items.add_prop(":date", std::move(dseq));
auto s = mu_msg_get_size (msg);
if (s == (size_t)-1) /* invalid size? */
s = 0;
items.add_prop(":size", s);
}
static void
add_tags (Node::Seq& items, MuMsg *msg)
{
Node::Seq tagseq;
for (auto tags = mu_msg_get_tags(msg); tags; tags = g_slist_next(tags))
tagseq.add((const char*)tags->data);
add_prop_nonempty (items, ":tags", std::move(tagseq));
}
Mu::Sexp::Node
Mu::msg_to_sexp (MuMsg *msg, unsigned docid,
const struct _MuMsgIterThreadInfo *ti,
MuMsgOptions opts)
{
g_return_val_if_fail (msg, Sexp::Node::make("error"));
g_return_val_if_fail (!((opts & MU_MSG_OPTION_HEADERS_ONLY) &&
(opts & MU_MSG_OPTION_EXTRACT_IMAGES)),
Sexp::Node::make("error"));
Node::Seq items;
if (docid != 0)
items.add_prop(":docid", docid);
if (ti)
add_thread_info (items, ti);
add_prop_nonempty (items, ":subject", mu_msg_get_subject (msg));
add_prop_nonempty (items, ":message-id", mu_msg_get_msgid (msg));
add_prop_nonempty (items, ":mailing-list", mu_msg_get_mailing_list (msg));
add_prop_nonempty (items, ":path", mu_msg_get_path (msg));
add_prop_nonempty (items, ":maildir", mu_msg_get_maildir (msg));
items.add_prop(":priority", Node::make_symbol(mu_msg_prio_name(mu_msg_get_prio(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)
add_contacts (items, msg);
add_prop_nonempty (items, ":references", mu_msg_get_references (msg));
add_prop_nonempty (items, ":in-reply-to", mu_msg_get_header (msg, "In-Reply-To"));
add_date_and_size (items, msg);
add_flags (items, msg);
add_tags (items, msg);
/* 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))
add_message_file_parts (items, msg, opts);
return Node::make_list(std::move(items));
}
char*
mu_msg_to_sexp (MuMsg *msg, unsigned docid, const MuMsgIterThreadInfo *ti,
MuMsgOptions opts)
{
return g_strdup (Mu::msg_to_sexp (msg, docid, ti, opts)
.to_string().c_str());
}
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