/** BEGIN COPYRIGHT BLOCK
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2009 Red Hat, Inc.
 * All rights reserved.
 *
 * License: GPL (version 3 or any later version).
 * See LICENSE for details.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

/* telex.c - Telex Number syntax routines */

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include "syntax.h"

static int telex_filter_ava(Slapi_PBlock *pb, struct berval *bvfilter, Slapi_Value **bvals, int ftype, Slapi_Value **retVal);
static int telex_filter_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value **bvals);
static int telex_values2keys(Slapi_PBlock *pb, Slapi_Value **val, Slapi_Value ***ivals, int ftype);
static int telex_assertion2keys_ava(Slapi_PBlock *pb, Slapi_Value *val, Slapi_Value ***ivals, int ftype);
static int telex_assertion2keys_sub(Slapi_PBlock *pb, char *initial, char **any, char * final, Slapi_Value ***ivals);
static int telex_compare(struct berval *v1, struct berval *v2);
static int telex_validate(struct berval *val);
static void telex_normalize(
    Slapi_PBlock *pb,
    char *s,
    int trim_spaces,
    char **alt);

/* the first name is the official one from RFC 4517 */
static char *names[] = {"Telex Number", "telexnumber", TELEXNUMBER_SYNTAX_OID, 0};

static Slapi_PluginDesc pdesc = {"telex-syntax", VENDOR, DS_PACKAGE_VERSION,
                                 "Telex Number attribute syntax plugin"};

int
telex_init(Slapi_PBlock *pb)
{
    int rc, flags;

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "=> telex_init\n");

    rc = slapi_pblock_set(pb, SLAPI_PLUGIN_VERSION,
                          (void *)SLAPI_PLUGIN_VERSION_01);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_DESCRIPTION,
                           (void *)&pdesc);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FILTER_AVA,
                           (void *)telex_filter_ava);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FILTER_SUB,
                           (void *)telex_filter_sub);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALUES2KEYS,
                           (void *)telex_values2keys);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_ASSERTION2KEYS_AVA,
                           (void *)telex_assertion2keys_ava);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_ASSERTION2KEYS_SUB,
                           (void *)telex_assertion2keys_sub);
    flags = SLAPI_PLUGIN_SYNTAX_FLAG_ORDERING;
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_FLAGS,
                           (void *)&flags);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NAMES,
                           (void *)names);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_OID,
                           (void *)TELEXNUMBER_SYNTAX_OID);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_COMPARE,
                           (void *)telex_compare);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_VALIDATE,
                           (void *)telex_validate);
    rc |= slapi_pblock_set(pb, SLAPI_PLUGIN_SYNTAX_NORMALIZE,
                           (void *)telex_normalize);

    slapi_log_err(SLAPI_LOG_PLUGIN, SYNTAX_PLUGIN_SUBSYSTEM, "<= telex_init %d\n", rc);
    return (rc);
}

static int
telex_filter_ava(
    Slapi_PBlock *pb,
    struct berval *bvfilter,
    Slapi_Value **bvals,
    int ftype,
    Slapi_Value **retVal)
{
    int filter_normalized = 0;
    int syntax = SYNTAX_CIS;
    if (pb) {
        slapi_pblock_get(pb, SLAPI_PLUGIN_SYNTAX_FILTER_NORMALIZED,
                         &filter_normalized);
        if (filter_normalized) {
            syntax |= SYNTAX_NORM_FILT;
        }
    }
    return (string_filter_ava(bvfilter, bvals, syntax,
                              ftype, retVal));
}


static int
telex_filter_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value **bvals)
{
    return (string_filter_sub(pb, initial, any, final, bvals, SYNTAX_CIS));
}

static int
telex_values2keys(
    Slapi_PBlock *pb,
    Slapi_Value **vals,
    Slapi_Value ***ivals,
    int ftype)
{
    return (string_values2keys(pb, vals, ivals, SYNTAX_CIS,
                               ftype));
}

static int
telex_assertion2keys_ava(
    Slapi_PBlock *pb,
    Slapi_Value *val,
    Slapi_Value ***ivals,
    int ftype)
{
    return (string_assertion2keys_ava(pb, val, ivals,
                                      SYNTAX_CIS, ftype));
}

static int
telex_assertion2keys_sub(
    Slapi_PBlock *pb,
    char *initial,
    char **any,
    char * final,
    Slapi_Value ***ivals)
{
    return (string_assertion2keys_sub(pb, initial, any, final, ivals,
                                      SYNTAX_CIS));
}

static int
telex_compare(
    struct berval *v1,
    struct berval *v2)
{
    return value_cmp(v1, v2, SYNTAX_CIS, 3 /* Normalise both values */);
}

static int
telex_validate(
    struct berval *val)
{
    int rc = 0; /* assume the value is valid */
    const char *start = NULL;
    const char *end = NULL;
    const char *p = NULL;
    const char *p2 = NULL;
    int num_dollars = 0;

    /* Per RFC4517:
     *
     * telex-number  = actual-number DOLLAR country-code
     *                   DOLLAR answerback
     * actual-number = PrintableString
     * country-code  = PrintableString
     * answerback    = PrintableString
     */

    /* Don't allow a 0 length string */
    if ((val == NULL) || (val->bv_len == 0)) {
        rc = 1;
        goto exit;
    }

    start = &(val->bv_val[0]);
    end = &(val->bv_val[val->bv_len - 1]);

    /* Look for the DOLLAR separators. */
    for (p = start; p <= end; p++) {
        if (IS_DOLLAR(*p)) {
            num_dollars++;

            /* Ensure we don't have an empty element. */
            if ((p == start) || (p == end)) {
                rc = 1;
                goto exit;
            }

            for (p2 = start; p2 < p; p2++) {
                if (!IS_PRINTABLE(*p2)) {
                    rc = 1;
                    goto exit;
                }
            }

            /* Reset start to the beginning
             * of the next element.  We're
             * guaranteed to have another
             * char after p. */
            start = p + 1;

            if (num_dollars == 2) {
                /* Validate the answerback element
                 * and exit. */
                for (p2 = start; p2 <= end; p2++) {
                    if (!IS_PRINTABLE(*p2)) {
                        rc = 1;
                        goto exit;
                    }
                }

                /* We've hit the end and it's
                 * all valid.  We're done. */
                goto exit;
            }
        }
    }

    /* Make sure we found all three elements. */
    if (num_dollars != 2) {
        rc = 1;
        goto exit;
    }

exit:
    return rc;
}

static void
telex_normalize(
    Slapi_PBlock *pb __attribute__((unused)),
    char *s,
    int trim_spaces,
    char **alt)
{
    value_normalize_ext(s, SYNTAX_CIS, trim_spaces, alt);
    return;
}