/* tools.c - tools for slap tools */
/* $OpenLDAP$ */
/*
 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */

#include "portable.h"

#include <stdio.h>
#include <ac/string.h>

#include "back-bdb.h"

static DBC *cursor = NULL;
static DBT key, data;

int bdb_tool_entry_open(
	BackendDB *be, int mode )
{
	/* initialize key and data thangs */
	DBTzero( &key );
	DBTzero( &data );
	key.flags = DB_DBT_REALLOC;
	data.flags = DB_DBT_REALLOC;

	return 0;
}

int bdb_tool_entry_close(
	BackendDB *be )
{
	struct bdb_info *bdb = (struct bdb_info *) be->be_private;

	assert( be != NULL );

	if( key.data ) {
		ch_free( key.data );
		key.data = NULL;
	}
	if( data.data ) {
		ch_free( data.data );
		data.data = NULL;
	}

	if( cursor ) {
		cursor->c_close( cursor );
		cursor = NULL;
	}

	return 0;
}

ID bdb_tool_entry_next(
	BackendDB *be )
{
	int rc;
	ID id;
	struct bdb_info *bdb = (struct bdb_info *) be->be_private;

	assert( be != NULL );
	assert( slapMode & SLAP_TOOL_MODE );
	assert( bdb != NULL );
	
	if (cursor == NULL) {
		rc = bdb->bi_id2entry->bdi_db->cursor(
			bdb->bi_id2entry->bdi_db, NULL, &cursor,
			bdb->bi_db_opflags );
		if( rc != 0 ) {
			return NOID;
		}
	}

	rc = cursor->c_get( cursor, &key, &data, DB_NEXT );

	if( rc != 0 ) {
		return NOID;
	}

	if( data.data == NULL ) {
		return NOID;
	}

	AC_MEMCPY( &id, key.data, key.size );
	return id;
}

Entry* bdb_tool_entry_get( BackendDB *be, ID id )
{
	int rc;
	Entry *e;
	struct berval bv;

	assert( be != NULL );
	assert( slapMode & SLAP_TOOL_MODE );
	assert( data.data != NULL );

	DBT2bv( &data, &bv );

	rc = entry_decode( &bv, &e );

	if( rc == LDAP_SUCCESS ) {
		e->e_id = id;
	}

	return e;
}

ID bdb_tool_entry_put(
	BackendDB *be,
	Entry *e )
{
	int rc;
	struct bdb_info *bdb = (struct bdb_info *) be->be_private;
	DB_TXN *tid = NULL;
	char *pdn;

	assert( be != NULL );
	assert( slapMode & SLAP_TOOL_MODE );

	Debug( LDAP_DEBUG_TRACE, "=> bdb_tool_entry_put( %ld, \"%s\" )\n",
		(long) e->e_id, e->e_dn, 0 );

	if( bdb->bi_txn ) {
		rc = txn_begin( bdb->bi_dbenv, NULL, &tid, 
			bdb->bi_db_opflags );
		if( rc != 0 ) {
			Debug( LDAP_DEBUG_ANY,
				"=> bdb_tool_entry_put: txn_begin failed: %s (%d)\n",
				db_strerror(rc), rc, 0 );
			return NOID;
		}
	}

	rc = bdb_next_id( be, tid, &e->e_id );
	if( rc != 0 ) {
		Debug( LDAP_DEBUG_ANY,
			"=> bdb_tool_entry_put: next_id failed: %s (%d)\n",
			db_strerror(rc), rc, 0 );
		goto done;
	}

	/* add dn2id indices */
	pdn = dn_parent( be, e->e_ndn );
	rc = bdb_dn2id_add( be, tid, pdn, e );
	if( pdn ) free( pdn );
	if( rc != 0 ) {
		Debug( LDAP_DEBUG_ANY,
			"=> bdb_tool_entry_put: dn2id_add failed: %s (%d)\n",
			db_strerror(rc), rc, 0 );
		goto done;
	}

	/* id2entry index */
	rc = bdb_id2entry_add( be, tid, e );
	if( rc != 0 ) {
		Debug( LDAP_DEBUG_ANY,
			"=> bdb_tool_entry_put: id2entry_add failed: %s (%d)\n",
			db_strerror(rc), rc, 0 );
		goto done;
	}

	rc = bdb_index_entry_add( be, tid, e, e->e_attrs );
	if( rc != 0 ) {
		Debug( LDAP_DEBUG_ANY,
			"=> bdb_tool_entry_put: index_entry_add failed: %s (%d)\n",
			db_strerror(rc), rc, 0 );
		goto done;
	}

done:
	if( bdb->bi_txn ) {
		if( rc == 0 ) {
			rc = txn_commit( tid, 0 );
			if( rc != 0 ) {
				Debug( LDAP_DEBUG_ANY,
					"=> bdb_tool_entry_put: txn_commit failed: %s (%d)\n",
					db_strerror(rc), rc, 0 );
				e->e_id = NOID;
			}

		} else {
			txn_abort( tid );
			Debug( LDAP_DEBUG_ANY,
				"=> bdb_tool_entry_put: txn_aborted! %s (%d)\n",
				db_strerror(rc), rc, 0 );
			e->e_id = NOID;
		}
	}

	return e->e_id;
}

int bdb_tool_entry_reindex(
	BackendDB *be,
	ID id )
{
	struct bdb_info *bi = (struct bdb_info *) be->be_private;
	int rc;
	Entry *e;
	DB_TXN *tid = NULL;
	char *pdn;

	Debug( LDAP_DEBUG_ARGS, "=> bdb_tool_entry_reindex( %ld )\n",
		(long) id, 0, 0 );

	e = bdb_tool_entry_get( be, id );

	if( e == NULL ) {
		Debug( LDAP_DEBUG_ANY,
			"bdb_tool_entry_reindex:: could not locate id=%ld\n",
			(long) id, 0, 0 );
		return -1;
	}

	if( bi->bi_txn ) {
		rc = txn_begin( bi->bi_dbenv, NULL, &tid, bi->bi_db_opflags );
		if( rc != 0 ) {
			Debug( LDAP_DEBUG_ANY,
				"=> bdb_tool_entry_reindex: txn_begin failed: %s (%d)\n",
				db_strerror(rc), rc, 0 );
			goto done;
		}
	}
 	
	/*
	 * just (re)add them for now
	 * assume that some other routine (not yet implemented)
	 * will zap index databases
	 *
	 */

	Debug( LDAP_DEBUG_TRACE, "=> bdb_tool_entry_reindex( %ld, \"%s\" )\n",
		(long) id, e->e_dn, 0 );

	/* add dn2id indices */
	pdn = dn_parent( be, e->e_ndn );
	rc = bdb_dn2id_add( be, tid, pdn, e );
	if( pdn ) free( pdn );
	if( rc != 0 && rc != DB_KEYEXIST ) {
		Debug( LDAP_DEBUG_ANY,
			"=> bdb_tool_entry_reindex: dn2id_add failed: %s (%d)\n",
			db_strerror(rc), rc, 0 );
		goto done;
	}

	rc = bdb_index_entry_add( be, tid, e, e->e_attrs );

done:
	if( bi->bi_txn ) {
		if( rc == 0 ) {
			rc = txn_commit( tid, 0 );
			if( rc != 0 ) {
				Debug( LDAP_DEBUG_ANY,
					"=> bdb_tool_entry_reindex: txn_commit failed: %s (%d)\n",
					db_strerror(rc), rc, 0 );
				e->e_id = NOID;
			}

		} else {
			txn_abort( tid );
			Debug( LDAP_DEBUG_ANY,
				"=> bdb_tool_entry_reindex: txn_aborted! %s (%d)\n",
				db_strerror(rc), rc, 0 );
			e->e_id = NOID;
		}
	}

	return rc;
}