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/*
* Copyright (C) 2019 Konsulko Group
* Author: Matt Ranostay <matt.ranostay@konsulko.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <glib.h>
#include <gio/gio.h>
#include <json-c/json.h>
#define AFB_BINDING_VERSION 3
#include <afb/afb-binding.h>
static void populate_json_entry(gchar *msg, json_object *jresp)
{
gchar **tmp = g_strsplit(msg, ":", 2);
gchar *key = g_ascii_strdown(tmp[0], -1), *ptr;
// TODO: process CHARSET in fields
ptr = strstr(key, ";");
if (ptr)
*ptr = '\0';
if (strlen(tmp[1]))
json_object_object_add(jresp, key, json_object_new_string(tmp[1]));
g_free(key);
g_strfreev(tmp);
}
static gboolean __expect(gchar ***msg, gchar *str, json_object *jresp, gboolean autoincrement)
{
gboolean ret = FALSE;
gchar *tmp;
if (!**msg)
return FALSE;
tmp = **msg;
if (jresp) {
ret = g_str_has_prefix(tmp, str);
populate_json_entry(tmp, jresp);
} else if (g_str_has_suffix(str, ":")) {
ret = g_str_has_prefix(tmp, str);
} else {
if (!g_strcmp0(tmp, str))
ret = TRUE;
}
if (autoincrement)
(*msg)++;
return ret;
}
#define expect(msg, str, jresp) { if (!__expect(msg, str, jresp, TRUE)) { return FALSE; }; }
static gboolean parse_recipient_vcard(gchar ***msg, json_object *jresp)
{
json_object *jobj;
expect(msg, "VERSION:", NULL);
jobj = json_object_new_object();
json_object_object_add(jresp, "recipient", jobj);
expect(msg, "FN", jobj);
expect(msg, "N", jobj);
expect(msg, "TEL:", jobj);
return TRUE;
}
static gboolean __bmessage_parse(gchar **msg, json_object *jresp)
{
gboolean benv = FALSE, bmsg = FALSE, vcard = FALSE;
GString *message = g_string_new(NULL);
// BMSG: Begin of valid message
expect(&msg, "BEGIN:BMSG", NULL);
// BMSG: Both Android and iOS
expect(&msg, "VERSION:", NULL);
expect(&msg, "STATUS:", jresp);
expect(&msg, "TYPE:", jresp);
expect(&msg, "FOLDER:", jresp);
// BMSG: iOS puts some non-standard stuff here
while (*msg) {
if (!vcard && __expect(&msg, "BEGIN:VCARD", NULL, TRUE)) {
vcard = parse_recipient_vcard(&msg, jresp);
continue;
}
// VCARD: any BENV is invalid if comes before the recipient data
if (!vcard)
continue;
if (!benv && __expect(&msg, "BEGIN:BENV", NULL, TRUE)) {
benv = TRUE;
continue;
}
// BENV: can't be in the message body yet
if (!benv)
continue;
if (!bmsg && __expect(&msg, "BEGIN:MSG", NULL, TRUE)) {
bmsg = TRUE;
continue;
}
// MSG: not in message yet
if (!bmsg)
continue;
// MSG: Keep looking for END:MSG
if (!__expect(&msg, "END:MSG", NULL, FALSE)) {
g_string_append(message, *msg);
g_string_append(message, "\n");
}
// MSG: Keep looking for END:MSG (increment this time)
if (__expect(&msg, "END:MSG", NULL, TRUE))
break;
}
// BMSG: End of valid message
expect(&msg, "END:BBODY", NULL);
expect(&msg, "END:BENV", NULL);
expect(&msg, "END:BMSG", NULL);
json_object_object_add(jresp, "message", json_object_new_string(message->str));
g_string_free(message, TRUE);
// If not BMSG then isn't a valid message
return bmsg;
}
// NOTE: replaces \r with \0 to make it easier to parse
static void sanitize_msg(gchar **msg)
{
while (*msg) {
gchar *tmp = *msg++;
if (g_str_has_suffix(tmp, "\r"))
*strstr(tmp, "\r") = '\0';
}
}
json_object *bmessage_parse(const gchar *bmessage)
{
gchar **msg;
json_object *jresp = json_object_new_object();
gboolean ret;
if (!bmessage || !strlen(bmessage))
return NULL;
AFB_INFO("Parsing incoming bMessage of length %lu", strlen(bmessage));
msg = g_strsplit(bmessage, "\n", -1);
sanitize_msg(msg);
ret = __bmessage_parse(msg, jresp);
if (!ret) {
json_object_put(jresp);
jresp = NULL;
}
g_strfreev(msg);
return jresp;
}
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