/*
 *	PROGRAM:	Interbase Message file entry program
 *	MODULE:		enter_messages.epp
 *	DESCRIPTION:	Allow entry of messages to database
 *
 * The contents of this file are subject to the Interbase Public
 * License Version 1.0 (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.Inprise.com/IPL.html
 *
 * Software distributed under the License is distributed on an
 * "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
 * or implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code was created by Inprise Corporation
 * and its predecessors. Portions created by Inprise Corporation are
 * Copyright (C) Inprise Corporation.
 *
 * All Rights Reserved.
 * Contributor(s): ______________________________________.
 */

#include "firebird.h"
#include <stdio.h>

#include "../jrd/ibase.h"
#include "../jrd/common.h"

#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_CTYPE_H
#include <ctype.h>
#endif
#include <stdlib.h>



DATABASE DB = "msg.fdb";

static void ascii_str_upper(UCHAR*);
static bool get_sql_class(UCHAR *);
static bool get_sql_code(SSHORT *);
static bool get_sql_subclass(UCHAR *);
static bool store_sql_msg(void);
static bool translate(const UCHAR*, UCHAR*, SSHORT);
static bool get_symbol( UCHAR *);

const int FAC_SQL_POSITIVE	= 14;
const int FAC_SQL_NEGATIVE	= 13;

const char LOWER_A		= 'a';
const char UPPER_A		= 'A';
const char LOWER_Z		= 'z';
const char UPPER_Z		= 'Z';


int main( int argc, char **argv)
{
/**************************************
 *
 *	m a i n
 *
 **************************************
 *
 * Functional description
 *	Top level routine.  
 *
 **************************************/

/* Note that the lengths of these variables are based on the lengths of the
 * fields in the message database */

	UCHAR facility[20], text[256], module[32], routine[32];
	UCHAR sql_class[32], sql_sub_class[32];
	UCHAR symbol[30], pub[1];
	UCHAR nstring[32];
	SSHORT count;
	SSHORT sql_num;
	bool public_msg;

/* Setup the 'strings' so that element 0 is really 0 */
	memset(facility, 0, sizeof(facility));
	memset(text, 0, sizeof(text));
	memset(module, 0, sizeof(module));
	memset(routine, 0, sizeof(routine));
	memset(sql_class, 0, sizeof(sql_class));
	memset(sql_sub_class, 0, sizeof(sql_sub_class));
	memset(symbol, 0, sizeof(symbol));
	memset(pub, 0, sizeof(pub));
	memset(nstring, 0, sizeof(nstring));

	printf("\nHit Ctrl-D (or Ctrl-Z) at prompt to exit level\n");
	printf
		("You will be prompted for facility, module, routine and message text\n");
	printf
		("You *must* enter module and routine names for each message; be prepared\n");
	printf("You will be returned a message number for the message\n");
	printf("You may assign an optional symbol for the message\n");
	printf
		("Escape sequences may be entered and will be translated to single bytes\n");

	READY;
	START_TRANSACTION;

	for (;;) {
		printf("Facility: ");
		if (gets((char*) facility) == NULL)
			break;
		ascii_str_upper(facility);
		count = 0;
		FOR X IN FACILITIES WITH X.FACILITY = facility
			count++;
			if (X.FAC_CODE == FAC_SQL_POSITIVE
				|| X.FAC_CODE == FAC_SQL_NEGATIVE)
			{
				if (!store_sql_msg())
					break;
			}
			else {
				MODIFY X USING
					for (;;) {
						printf(" Module: ");
						if (!gets((char*) module))
							break;
						printf(" Routine: ");
						if (!gets((char*) routine))
							break;
						printf(" Text: ");
						if (!gets((char*) text))
							break;
						symbol[0] = 0;

						/* All JRD messages are public.  Only ask if entering messages
						 * in a component other than JRD */
						if (X.FAC_CODE != 0) {
							printf("Public [y/n]: ");
							gets((char*) pub);
							if (*pub == 'Y' || *pub == 'y')
								public_msg = true;
							else
								public_msg = false;
						}
						else
							public_msg = true;

						printf(" Symbol: ");
						if (!gets((char*) symbol))
							break;

						if (public_msg) {
							if (!symbol[0])
								if (!get_symbol(symbol))
									break;

							if (!get_sql_code(&sql_num))
								break;

							if (!get_sql_class(sql_class))
								/* continue */ ;

							if (!get_sql_subclass(sql_sub_class))
								/* continue */ ;

							STORE S IN SYSTEM_ERRORS USING
								S.FAC_CODE = X.FAC_CODE;
								S.NUMBER = X.MAX_NUMBER;

								S.SQL_CODE = sql_num;

								strcpy(S.GDS_SYMBOL, (char*) symbol);
								if (sql_class[0]) {
									strcpy(S.SQL_CLASS, (char*) sql_class);
									S.SQL_CLASS.NULL = FALSE;
								}
								else
									S.SQL_CLASS.NULL = TRUE;
								if (sql_sub_class[0]) {
									strcpy(S.SQL_SUBCLASS, (char*) sql_sub_class);
									S.SQL_SUBCLASS.NULL = FALSE;
								}
								else
									S.SQL_SUBCLASS.NULL = TRUE;
							END_STORE;

						}

						STORE Y IN MESSAGES USING
							Y.FAC_CODE = X.FAC_CODE;
							Y.NUMBER = X.MAX_NUMBER;
							strcpy(Y.MODULE, (char*) module);
							strcpy(Y.ROUTINE, (char*) routine);
							strcpy(Y.SYMBOL, (char*) symbol);
							if (!translate(text, (UCHAR*) Y.TEXT, sizeof(Y.TEXT))) {
								printf
									("Message too long: max length: %d\n",
									 sizeof(Y.TEXT));
								break;
							}
							printf("Message number: %d\n", X.MAX_NUMBER);
							X.MAX_NUMBER = X.MAX_NUMBER + 1;
						END_STORE;
					}
				END_MODIFY;
			}
		END_FOR;
		if (!count) {
			printf("Facilty %s not found\n  Known facilities are:\n",
					  facility);
			FOR F IN FACILITIES SORTED BY F.FACILITY
				printf("    %s\n", F.FACILITY);
			END_FOR;
		}
	}

	COMMIT;
	FINISH;
	exit(FINI_OK);
}


static void ascii_str_upper( UCHAR * str)
{
/**************************************
 *
 *	a s c i i _ s t r _ u p p e r
 *
 **************************************
 *
 * Functional description
 * 	change a string to all upper case
 *
 **************************************/

	while (*str) {
		/* subtract 32 if necessary */

		if (*str >= LOWER_A && *str <= LOWER_Z)
			*str += (UPPER_A - LOWER_A);
		str++;
	}
}


static bool get_sql_class( UCHAR * sql_class)
{
/**************************************
 *
 *	g e t _ s q l _ c l a s s
 *
 **************************************
 *
 * Functional description
 *	get a two character sql_class string
 *	return true if we get one, otherwise false
 *
 **************************************/
	while (true) {
		printf(" SQLCLASS: ");
		gets((char*) sql_class);
		const SSHORT length = strlen((char*) sql_class);
		if (length == 0 || !isalnum(sql_class[0]))
			break;

		if (length == 2)
			return true;
		else
			fprintf(stderr, "Sqlclass is two characters!\n");
	}

	return false;
}


static bool get_sql_code( SSHORT * sql_code)
{
/**************************************
 *
 *	g e t _ s q l _ c o d e
 *
 **************************************
 *
 * Functional description
 *	prompt for sql_code and convert it to a number
 *	return true on success, otherwise false
 *	Issue a warning if the SQL code is not in the SQLERR facility
 *
 **************************************/
	UCHAR nstring[32];
	SSHORT sign;
	SSHORT sql_num;
	SSHORT srch_num;
	bool ret = false;

	while (true) {
		printf(" SQLCODE: ");
		if (!gets((char*) nstring))
			break;
		const UCHAR* p = nstring;
		sign = 1;
		sql_num = 0;

		/* skip spaces */
		while (*p && *p == ' ')
			p++;

		/* Allow for leading sign */
		if (*p == '+')
			p++;
		else if (*p == '-') {
			p++;
			sign = -1;
		}

		/* skip spaces again */
		while (*p && *p == ' ')
			p++;

		/* and if anything is left, convert to a number .. */
		if (*p && isdigit(*p)) {
			sql_num = sign * atoi((char*) p);
			*sql_code = sql_num;
			ret = true;
			break;
		}
		else {
			fprintf(stderr, "SQLCode is now required!\n");
		}
	}

/* make sure that the SQL code is in the SQLERR facility */
	if (ret) {
		bool got_it = false;
		if (sql_num < 0) {
			srch_num = 1000 + sql_num;
			FOR M IN MESSAGES WITH M.FAC_CODE = FAC_SQL_NEGATIVE
				AND M.NUMBER = srch_num 

                got_it = true;
			END_FOR;
		}
		else {
			srch_num = sql_num;
			FOR M IN MESSAGES WITH M.FAC_CODE = FAC_SQL_POSITIVE
				AND M.NUMBER = srch_num 

                got_it = true;
			END_FOR;
		}
		if (!got_it) {
			printf("Warning: SQL code %d is not in the SQLERR facility.\n",
					  sql_num);
			printf("You will need to add it there too.\n");
		}
	}
	return ret;
}


static bool get_sql_subclass( UCHAR * sql_sub_class)
{
/**************************************
 *
 *	g e t _ s q l _ s u b c l a s s
 *
 **************************************
 *
 * Functional description
 *	get a three character sql_subclass string
 *	return true if we get one, otherwise false
 *
 **************************************/
	while (true) {
		printf(" SQLSUBCLASS: ");
		gets((char*) sql_sub_class);
		const SSHORT length = strlen((char*) sql_sub_class);
		if (length == 0 || !isalnum(sql_sub_class[0]))
			break;

		if (length == 3)
			return true;
		else {
			fprintf(stderr, "Sqlsubclass is three characters!\n");
			continue;
		}
	}

	return false;
}


static bool get_symbol( UCHAR * symbol)
{
/**************************************
 *
 *	g e t _ s y m b o l
 *
 **************************************
 *
 * Functional description
 *	insist on getting the symbol
 *	return true when we get one
 *	or false if user breaks out
 *
 **************************************/
	while (true) {
		fprintf(stderr, "Symbols are required for system errors!\n");
		printf(" Symbol: ");
		gets((char*) symbol);
		if (!strlen((char*) symbol) || !isalnum(symbol[0]))
			return false;
		else
			return true;
	}
}


static bool store_sql_msg(void)
{
/**************************************
 *
 *	s t o r e _ s q l _ m s g
 *
 **************************************
 *
 * Functional description
 *	sql messages key off the sql code. The
 *	compound message number works out to
 *	the offset from 1400.
 *
 **************************************/
	UCHAR text[256], nstring[32];
	SSHORT sql_num;

	for (;;) {
		printf("Enter the sqlcode: ");
		if (!gets((char*) nstring))
			break;;

		sql_num = atoi((char*) nstring);
		printf(" Text: ");
		if (!gets((char*) text))
			break;

		STORE Y IN MESSAGES USING
			if (sql_num < 0) {
				Y.NUMBER = 1000 + sql_num;
				Y.FAC_CODE = FAC_SQL_NEGATIVE;
			}
			else {
				Y.NUMBER = sql_num;
				Y.FAC_CODE = FAC_SQL_POSITIVE;
			}

			/* translate escape sequences to single bytes */

			if (!translate(text, (UCHAR*) Y.TEXT, sizeof(Y.TEXT))) {
				printf("Message too long: max length: %d\n",
						  sizeof(Y.TEXT));
				return false;
			}
		END_STORE;
	}

	return true;
}


static bool translate( const UCHAR* source, UCHAR* target, SSHORT length)
{
/**************************************
 *
 *	t r a n s l a t e
 *
 **************************************
 *
 * Functional description
 * 	make explicit escape sequences into
 *	ascii, returns length ok?
 **************************************/
	UCHAR* p = target;
	const UCHAR* q = source;

	while (*q) {
		if (!--length)
			return false;
		if (*q == '\\') {
			*q++;
			switch (*q) {
			case 'n':
				*p++ = '\n';
				break;
			case 't':
				*p++ = '\t';
				break;
			case 'f':
				*p++ = '\f';
				break;
			case 'a':
				*p++ = '\a';
				break;
			case 'b':
				*p++ = '\b';
				break;
			case 'r':
				*p++ = '\r';
				break;
			case 'v':
				*p++ = '\v';
				break;
			case '\\':
				*p++ = '\\';
				break;
			case '\"':
				*p++ = '\"';
				break;
			case '\'':
				*p++ = '\'';
				break;
			default:
				printf
					("\n\n*** Escape sequence not understood; being copied unchanged ***\n\n");
				*p++ = '\\';
				*p++ = *q;
			}
			*q++;
		}
		else
			*p++ = *q++;
	}
	*p = 0;
	return true;
}