/* 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/mg_ol_0026.pgc"
/* @tier medium @module mg @transform msg-gateway-online */
/*
 * mg_ol_0026.pgc - 전문게이트웨이 전문 필드 치환 서비스 (MG_OL_0026)  [tier=medium]
 *
 * 개인정보 보호를 위해 전문 필드에 마스킹 치환규칙을 적용한다.
 * 카드번호(CARDNO)는 앞 6자리·뒤 4자리만 남기고 가운데를 '*'로 치환하고,
 * 주민번호식(RRN) 13자리는 뒤 7자리를 치환한다. 치환된 자릿수를 집계하여
 * 마스킹 결과와 함께 응답한다. (순수 치환 로직 - DB 접근 없음)
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "acq_util.h"
#include "mg_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 17 "app/online/mg_ol_0026.pgc"


/* 문자열 가운데를 마스킹: 앞 keep_head, 뒤 keep_tail 만 보존. 치환자릿수 반환 */
static int mask_middle(char *s, int keep_head, int keep_tail)
{
    int len = (int)strlen(s);
    int i, masked = 0;

    if (len <= keep_head + keep_tail)
        return 0;
    for (i = keep_head; i < len - keep_tail; i++) {
        if (s[i] != '*') {
            s[i] = '*';
            masked++;
        }
    }
    return masked;
}

TX_SERVICE(MG_OL_0026, ctx)
{
    char cardno[24], rrn[16];
    int  have_card, have_rrn;
    int  masked = 0;

    tx_log(TX_LOG_INFO, "[MG_OL_0026] 전문 필드 치환 서비스 진입");

    have_card = (tx_buf_get(ctx->in, "CARDNO", cardno, sizeof(cardno)) == TX_OK);
    have_rrn  = (tx_buf_get(ctx->in, "RRN", rrn, sizeof(rrn)) == TX_OK);

    if (!have_card && !have_rrn) {
        tx_log(TX_LOG_ERROR, "[MG_OL_0026] 치환대상 필드(CARDNO/RRN) 없음");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }

    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESP", RESP_OK);

    /* 1) 카드번호 마스킹: 앞 6 / 뒤 4 보존 */
    if (have_card) {
        if (strlen(cardno) < 12) {
            tx_log(TX_LOG_WARN, "[MG_OL_0026] 카드번호 길이 부족 len=%d",
                   (int)strlen(cardno));
        } else {
            masked += mask_middle(cardno, 6, 4);
            tx_buf_sets(ctx->out, "CARDNO", cardno);
        }
    }

    /* 2) 주민번호식 마스킹: 앞 6 보존, 뒤 7 전부 치환 */
    if (have_rrn) {
        if (strlen(rrn) < 7) {
            tx_log(TX_LOG_WARN, "[MG_OL_0026] 주민번호식 길이 부족 len=%d",
                   (int)strlen(rrn));
        } else {
            masked += mask_middle(rrn, 6, 0);
            tx_buf_sets(ctx->out, "RRN", rrn);
        }
    }

    /* 3) 치환건수 응답 */
    tx_buf_setlong(ctx->out, "MASKED", (long)masked);
    tx_log(TX_LOG_INFO, "[MG_OL_0026] 치환완료 치환자릿수=%d", masked);
    tx_return(ctx, TX_OK, ctx->out);
}