/* Processed by ecpg (15.18 (Debian 15.18-0+deb12u1)) */
/* These include files are added by the preprocessor */
#include <ecpglib.h>
#include <ecpgerrno.h>
#include <sqlca.h>
/* End of automatic include section */

#line 1 "app/online/cm_ol_0022.pgc"
/* @tier easy @module cm @transform common-online */
/*
 * cm_ol_0022.pgc - 카드번호 마스킹 유틸 서비스 (CM_OL_0022)  [tier=easy]
 *
 * 요청의 카드번호(CARDNO)에서 숫자만 추출하여 앞 6자리/뒤 4자리만
 * 노출하고 가운데를 '*' 로 치환한 마스킹 결과와 자릿수를 응답한다.
 * DB 접근 없는 순수 로직 서비스. (ATMI void SVC(TPSVCINFO*) 대응)
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "acq_util.h"
#include "cm_core.h"


#line 1 "/usr/include/postgresql/sqlca.h"
#ifndef POSTGRES_SQLCA_H
#define POSTGRES_SQLCA_H

#ifndef PGDLLIMPORT
#if  defined(WIN32) || defined(__CYGWIN__)
#define PGDLLIMPORT __declspec (dllimport)
#else
#define PGDLLIMPORT
#endif							/* __CYGWIN__ */
#endif							/* PGDLLIMPORT */

#define SQLERRMC_LEN	150

#ifdef __cplusplus
extern "C"
{
#endif

struct sqlca_t
{
	char		sqlcaid[8];
	long		sqlabc;
	long		sqlcode;
	struct
	{
		int			sqlerrml;
		char		sqlerrmc[SQLERRMC_LEN];
	}			sqlerrm;
	char		sqlerrp[8];
	long		sqlerrd[6];
	/* Element 0: empty						*/
	/* 1: OID of processed tuple if applicable			*/
	/* 2: number of rows processed				*/
	/* after an INSERT, UPDATE or				*/
	/* DELETE statement					*/
	/* 3: empty						*/
	/* 4: empty						*/
	/* 5: empty						*/
	char		sqlwarn[8];
	/* Element 0: set to 'W' if at least one other is 'W'	*/
	/* 1: if 'W' at least one character string		*/
	/* value was truncated when it was			*/
	/* stored into a host variable.             */

	/*
	 * 2: if 'W' a (hopefully) non-fatal notice occurred
	 */	/* 3: empty */
	/* 4: empty						*/
	/* 5: empty						*/
	/* 6: empty						*/
	/* 7: empty						*/

	char		sqlstate[5];
};

struct sqlca_t *ECPGget_sqlca(void);

#ifndef POSTGRES_ECPG_INTERNAL
#define sqlca (*ECPGget_sqlca())
#endif

#ifdef __cplusplus
}
#endif

#endif

#line 16 "app/online/cm_ol_0022.pgc"


/* 카드번호 문자열에서 숫자만 추출해 dst 로 복사, 유효 자릿수 반환 */
static int cm_digits_only(const char *src, char *dst, int dstlen)
{
    int i;
    int n = 0;

    for (i = 0; src[i] != '\0' && n < dstlen - 1; i++) {
        if (src[i] >= '0' && src[i] <= '9') {
            dst[n++] = src[i];
        }
    }
    dst[n] = '\0';
    return n;
}

TX_SERVICE(CM_OL_0022, ctx)
{
    char cardno[32];
    char digits[24];
    char masked[24];
    int  len;
    int  i;

    tx_log(TX_LOG_INFO, "[CM_OL_0022] 카드번호 마스킹 서비스 진입");

    if (tx_buf_get(ctx->in, "CARDNO", cardno, sizeof(cardno)) != TX_OK) {
        tx_log(TX_LOG_ERROR, "[CM_OL_0022] CARDNO 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    len = cm_digits_only(cardno, digits, sizeof(digits));
    if (len < 12 || len > 19) {
        tx_log(TX_LOG_WARN, "[CM_OL_0022] 카드번호 자릿수 오류 len=%d", len);
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    /* 앞 6자리와 뒤 4자리는 원본 유지, 그 사이는 '*' 로 치환 */
    for (i = 0; i < len; i++) {
        if (i < 6 || i >= len - 4) {
            masked[i] = digits[i];
        } else {
            masked[i] = '*';
        }
    }
    masked[len] = '\0';

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "MASKED", masked);
    tx_buf_setlong(ctx->out, "DIGITS", (long)len);
    tx_buf_sets(ctx->out, "RESULT", "OK");
    tx_log(TX_LOG_INFO, "[CM_OL_0022] 마스킹 완료 masked=%s len=%d", masked, len);
    tx_return(ctx, TX_OK, ctx->out);
}