/* json_support.c -- Helper functions for jansson and JSON
 *
 * Copyright (c) 1994-2019 Carnegie Mellon University.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The name "Carnegie Mellon University" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For permission or any legal
 *    details, please contact
 *      Carnegie Mellon University
 *      Center for Technology Transfer and Enterprise Creation
 *      4615 Forbes Avenue
 *      Suite 302
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 * 4. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by Computing Services
 *     at Carnegie Mellon University (http://www.cmu.edu/computing/)."
 *
 * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
 * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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 */


#include <config.h>

#include <string.h>
#include <time.h>

#include "json_support.h"

int json_is_utcdate(json_t *json)
{
    const char *s = NULL;
    struct tm date;

    if (!json_is_string(json)) return 0;

    s = strptime(json_string_value(json), "%Y-%m-%dT%H:%M:%SZ", &date);
    return (s && *s == '\0');
}

int json_array_find(json_t *array, const char *needle)
{
    size_t i;
    json_t *val;

    json_array_foreach(array, i, val) {
        if (!strcmp(needle, json_string_value(val))) return i;
    }

    return -1;
}

#ifdef NEED_JANSSON_JSON_DUMPB
/* https://jansson.readthedocs.io/en/2.11/apiref.html#c.json_dumpb */
EXPORTED size_t json_dumpb(const json_t *json,
                           char *buffer, size_t size, size_t flags)
{
    char *s;
    size_t slen;

    s = json_dumps(json, flags);
    if (!s) return 0;
    slen = strlen(s);

    if (slen > size) {
        free(s);
        return slen;
    }

    /* n.b. json_dumpb() does NOT nul-terminate the buffer! */
    memcpy(buffer, s, slen);
    free(s);

    return slen;
}
#endif