[Chad]

I was importing from my Vbulletin 4 and it went through converting topics, then it started converting tags and hung about 12,900. Is this a known bug? What’s the best way to do this over without losing the imported content and without taking risks of missing content not being imported initially on the hang up? Any ideas why it would hang up like that? It took a pretty long time just to do the topics. It didn’t start the users yet either. You’d think it would import users first?

Side note, I don’t see any area to set up bbcodes? Is bbcode not a default feature?

[Chad]

Would appreciate help on this please, thank you.

@netweb maybe you know?

[Chad]

Dead community I guess

[Robkk]

we are not dead :/

@netweb is the bbPress community’s import specialist

the guy is most likely asleep now because he was working on some bbPress tickets all night… or all day depending on Aussie time??

as for bbcodes bbcodes is not a default feature for bbPress you would need an additional plugin for that.

https://wordpress.org/plugins/gd-bbpress-tools/ this plugin comes with a quote feature and more.

there is another plugin called bbpress 2 bbcode which would also need the whitelist plugin by the same developer.

[gavintyte]

What’s the best way to do this over without losing the imported content and without taking risks of missing content not being imported initially on the hang up?

Make sure you back up both your WordPress and vBulletin databases – and try the import on a local server using something like MAMP.

It took a pretty long time just to do the topics. It didn’t start the users yet either. You’d think it would import users first?

It takes a long time. My vBulletin import took 17 hours last time I tried it! Biggish database tho.

The order should be (I think):

1. Users
2. Forums
3. Topics
4. Tags
5. Replies

So check you had the ‘Attempt to import user accounts from previous forums’ checkbox ticked.

I was importing from my Vbulletin 4 and it went through converting topics, then it started converting tags and hung about 12,900. Is this a known bug?

Unlikely a bug. It seems there might be several reasons why it might ‘hang’. For example, if you are getting a line of ‘dashes’ this meaning you’re logged out of WordPress. It could be that one of your tags has some nasty data that is tripping the import, etc.

[Chad]

My database is only 1.2GB in size. I don’t think that’s necessary too big?

I’m going to try to reimport again. I hope this works!

[budget101]

I was importing from my Vbulletin 4 and it went through converting topics, then it started converting tags and hung about 12,900. Is this a known bug? What’s the best way to do this over without losing the imported content and without taking risks of missing content not being imported initially on the hang up?

I’m a day late and a dollar short, but I thought I’d answer this for anyone else experiencing a similar issue.

vB4 tables originally used latin1_swedish_ci Collation, so when they’re imported certain characters don’t import properly causing the import to hang.

If the bbpress converter hangs up you can see what the last query was running. go to your WordPress MySQL Database:

Find the wp_options table (note that your table prefix may be different)

1. Shut off the importer (hit the STOP Button)
2. Go to the wp_options table & do a search for %converter% – it will return 3 tables

  a. _bbp_converter_query
  b. _bbp_converter_start
  c. _bbp_converter_step

Select both _bbp_converter_start AND _bbp_converter_query and click edit. Look to see where the tags got hung up in the option value field-

(here’s an example from my own database):

SELECT convert(tagcontent.contentid USING "utf8mb4") AS contentid,convert(tagcontent.tagid USING 
"utf8mb4") AS tagid,convert(tag.tagtext USING "utf8mb4") AS tagtext FROM tagcontent AS tagcontent INNER JOIN tag AS tag USING (tagid) LIMIT 2750, 50

In this case, it’s getting hung while imported tags 2750, 50 rows at a time.

change the values to the next bracket (but don’t alter any other data in the fields,:

_bbp_converter_start  2800
_bbp_converter_query 2800

and hit save

so now the option_value of the _bbp_converter_query looks like this:

SELECT convert(tagcontent.contentid USING "utf8mb4") AS contentid,convert(tagcontent.tagid USING 
"utf8mb4") AS tagid,convert(tag.tagtext USING "utf8mb4") AS tagtext FROM tagcontent AS tagcontent INNER JOIN tag AS tag USING (tagid) LIMIT 2800, 100

(note the new LIMIT number)

Then hit the START button on your Converter. IF, for some odd reason it doesn’t automatically restart, don’t freak out. Just hit the STOP button again, open a new page for the import

http://YOURDOMAINHERE.com/wp-admin/tools.php?page=bbp-converter

Re-enter your data, with the rows limit at 100, delay time the same as before & convert users STILL

Checked (if it was to begin with) DO NOT CHECK START OVER or PREVIOUS IMPORT.

Hit START and it will pick up where it left off.

Alternatively, you can
2. remove the offending tags from vbulletin –> /admincp/tag.php there are 45 per pg
3. update thread counters
4. Start the importer, see if it updates
5. If so- you’re all set *until next time* (and there WILL be a Next time!)

[budget101]

The order should be (I think):

Users
Forums
Topics
Tags
Replies

Agreed, this is necessary for large imports, I initially had a database of 110K+ users and 2.2 million posts/topics, which after 13 days of importing I decided to prune before attempting again.

In theory, you could rearrange these yourself by altering the wp-content>plugins>bbpress>includes>admin>converter.php file and changing the order of the steps. I actually thing the tags are the least important step for my site & the one that caused the most headache/issues while importing, so I made that step the LAST step.

<?php

/**
 * bbPress Converter
 *
 * Based on the hard work of Adam Ellis at http://bbconverter.com
 *
 * @package bbPress
 * @subpackage Administration
 */

// Exit if accessed directly
if ( !defined( 'ABSPATH' ) ) exit;

/**
 * Main BBP_Converter Class
 */
class BBP_Converter {

	/**
	 * The main bbPress Converter loader
	 *
	 * @since bbPress (r3813)
	 * @uses BBP_Converter::includes() Include the required files
	 * @uses BBP_Converter::setup_actions() Setup the actions
	 */
	public function __construct() {

		// "I wonder where I'll float next."
		if ( empty( $_SERVER['REQUEST_METHOD'] ) )
			return;

		// Bail if request is not correct
		switch ( strtoupper( $_SERVER['REQUEST_METHOD'] ) ) {

			// Converter is converting
			case 'POST' :
				if ( ( empty( $_POST['action'] ) || ( 'bbconverter_process' !=  $_POST['action'] ) ) )
					return;

				break;

			// Some other admin page
			case 'GET'  :
				if ( ( empty( $_GET['page'] ) || ( 'bbp-converter' !=  $_GET['page'] ) ) )
					return;

				break;
		}

		// Proceed with the actions
		$this->setup_actions();
	}

	/**
	 * Setup the default actions
	 *
	 * @since bbPress (r3813)
	 * @uses add_action() To add various actions
	 */
	private function setup_actions() {

		// Attach to the admin head with our ajax requests cycle and css
		add_action( 'bbp_admin_head',              array( $this, 'admin_head'              ) );

		// Attach the bbConverter admin settings action to the WordPress admin init action.
		add_action( 'bbp_register_admin_settings', array( $this, 'register_admin_settings' ) );

		// Attach to the admin ajax request to process cycles
		add_action( 'wp_ajax_bbconverter_process', array( $this, 'process_callback'        ) );
	}

	/**
	 * Register the settings
	 *
	 * @since bbPress (r3813)
	 * @uses add_settings_section() To add our own settings section
	 * @uses add_settings_field() To add various settings fields
	 * @uses register_setting() To register various settings
	 */
	public function register_admin_settings() {

		// Add the main section
		add_settings_section( 'bbpress_converter_main',     __( 'Database Settings', 'bbpress' ),  'bbp_converter_setting_callback_main_section', 'bbpress_converter' );

		// System Select
		add_settings_field( '_bbp_converter_platform',      __( 'Select Platform',   'bbpress' ),  'bbp_converter_setting_callback_platform', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_platform',           'sanitize_title' );

		// Database Server
		add_settings_field( '_bbp_converter_db_server',     __( 'Database Server',   'bbpress' ),  'bbp_converter_setting_callback_dbserver', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_server',          'sanitize_title' );

		// Database Server Port
		add_settings_field( '_bbp_converter_db_port',       __( 'Database Port',     'bbpress' ),  'bbp_converter_setting_callback_dbport', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_port',            'sanitize_title' );

		// Database Name
		add_settings_field( '_bbp_converter_db_name',       __( 'Database Name',     'bbpress' ),  'bbp_converter_setting_callback_dbname', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_name',            'sanitize_title' );

		// Database User
		add_settings_field( '_bbp_converter_db_user',       __( 'Database User',     'bbpress' ),  'bbp_converter_setting_callback_dbuser', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_user',            'sanitize_title' );

		// Database Pass
		add_settings_field( '_bbp_converter_db_pass',       __( 'Database Password', 'bbpress' ),  'bbp_converter_setting_callback_dbpass', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_pass',            'sanitize_title' );

		// Database Prefix
		add_settings_field( '_bbp_converter_db_prefix',     __( 'Table Prefix',      'bbpress' ),  'bbp_converter_setting_callback_dbprefix', 'bbpress_converter', 'bbpress_converter_main' );
		register_setting  ( 'bbpress_converter_main',       '_bbp_converter_db_prefix',          'sanitize_title' );

		// Add the options section
		add_settings_section( 'bbpress_converter_opt',      __( 'Options',           'bbpress' ),  'bbp_converter_setting_callback_options_section', 'bbpress_converter' );

		// Rows Limit
		add_settings_field( '_bbp_converter_rows',          __( 'Rows Limit',        'bbpress' ),  'bbp_converter_setting_callback_rows', 'bbpress_converter', 'bbpress_converter_opt' );
		register_setting  ( 'bbpress_converter_opt',        '_bbp_converter_rows',               'intval' );

		// Delay Time
		add_settings_field( '_bbp_converter_delay_time',    __( 'Delay Time',        'bbpress' ), 'bbp_converter_setting_callback_delay_time', 'bbpress_converter', 'bbpress_converter_opt' );
		register_setting  ( 'bbpress_converter_opt',        '_bbp_converter_delay_time',        'intval' );

		// Convert Users ?
		add_settings_field( '_bbp_converter_convert_users', __( 'Convert Users',     'bbpress' ), 'bbp_converter_setting_callback_convert_users', 'bbpress_converter', 'bbpress_converter_opt' );
		register_setting  ( 'bbpress_converter_opt',        '_bbp_converter_convert_users',     'intval' );

		// Restart
		add_settings_field( '_bbp_converter_restart',       __( 'Start Over',        'bbpress' ), 'bbp_converter_setting_callback_restart', 'bbpress_converter', 'bbpress_converter_opt' );
		register_setting  ( 'bbpress_converter_opt',        '_bbp_converter_restart',           'intval' );

		// Clean
		add_settings_field( '_bbp_converter_clean',         __( 'Purge Previous Import', 'bbpress' ), 'bbp_converter_setting_callback_clean', 'bbpress_converter', 'bbpress_converter_opt' );
		register_setting  ( 'bbpress_converter_opt',        '_bbp_converter_clean',             'intval' );
	}

	/**
	 * Admin scripts
	 *
	 * @since bbPress (r3813)
	 */
	public function admin_head() { ?>

		<style type="text/css" media="screen">
			/*<![CDATA[*/

			div.bbp-converter-updated,
			div.bbp-converter-warning {
				border-radius: 3px 3px 3px 3px;
				border-style: solid;
				border-width: 1px;
				padding: 5px 5px 5px 5px;
			}

			div.bbp-converter-updated {
				height: 300px;
				overflow: auto;
				display: none;
				background-color: #FFFFE0;
				border-color: #E6DB55;
				font-family: monospace;
				font-weight: bold;
			}

			div.bbp-converter-updated p {
				margin: 0.5em 0;
				padding: 2px;
				float: left;
				clear: left;
			}

			div.bbp-converter-updated p.loading {
				background-image: url('%3C?php echo admin_url(');
				background-repeat: no-repeat;
				background-position:  right center;; padding-left:2px; padding-right:20px; padding-top:2px; padding-bottom:2px
			}

			#bbp-converter-stop {
				display:none;
			}

			#bbp-converter-progress {
				display:none;
			}

			/*]]>*/
		</style>

		<script language="javascript">

			var bbconverter_is_running = false;
			var bbconverter_run_timer;
			var bbconverter_delay_time = 0;

			function bbconverter_grab_data() {
				var values = {};
				jQuery.each(jQuery('#bbp-converter-settings').serializeArray(), function(i, field) {
					values[field.name] = field.value;
				});

				if( values['_bbp_converter_restart'] ) {
					jQuery('#_bbp_converter_restart').removeAttr("checked");
				}

				if( values['_bbp_converter_delay_time'] ) {
					bbconverter_delay_time = values['_bbp_converter_delay_time'] * 1000;
				}

				values['action'] = 'bbconverter_process';
				values['_ajax_nonce'] = '<?php echo  wp_create_nonce( 'bbp_converter_process' ); ?>';

				return values;
			}

			function bbconverter_start() {
				if( false == bbconverter_is_running ) {
					bbconverter_is_running = true;
					jQuery('#bbp-converter-start').hide();
					jQuery('#bbp-converter-stop').show();
					jQuery('#bbp-converter-progress').show();
					bbconverter_log( '<p class="loading"><?php esc_html_e( 'Starting Conversion', 'bbpress' ); ?></p>' );
					bbconverter_run();
				}
			}

			function bbconverter_run() {
				jQuery.post(ajaxurl, bbconverter_grab_data(), function(response) {
					var response_length = response.length - 1;
					response = response.substring(0,response_length);
					bbconverter_success(response);
				});
			}

			function bbconverter_stop() {
				jQuery('#bbp-converter-start').show();
				jQuery('#bbp-converter-stop').hide();
				jQuery('#bbp-converter-progress').hide();
				jQuery('#bbp-converter-message p').removeClass( 'loading' );
				bbconverter_is_running = false;
				clearTimeout( bbconverter_run_timer );
			}

			function bbconverter_success(response) {
				bbconverter_log(response);

				if ( response == '<p class="loading"><?php esc_html_e( 'Conversion Complete', 'bbpress' ); ?></p>' || response.indexOf('error') > -1 ) {
					bbconverter_log('<p>Repair any missing information: <a href="<?php echo admin_url(); ?>tools.php?page=bbp-repair">Continue</a></p>');
					bbconverter_stop();
				} else if( bbconverter_is_running ) { // keep going
					jQuery('#bbp-converter-progress').show();
					clearTimeout( bbconverter_run_timer );
					bbconverter_run_timer = setTimeout( 'bbconverter_run()', bbconverter_delay_time );
				} else {
					bbconverter_stop();
				}
			}

			function bbconverter_log(text) {
				if ( jQuery('#bbp-converter-message').css('display') == 'none' ) {
					jQuery('#bbp-converter-message').show();
				}
				if ( text ) {
					jQuery('#bbp-converter-message p').removeClass( 'loading' );
					jQuery('#bbp-converter-message').prepend( text );
				}
			}

		</script>

		<?php
	}

	/**
	 * Wrap the converter output in paragraph tags, so styling can be applied
	 *
	 * @since bbPress (r4052)
	 *
	 * @param string $output
	 */
	private static function converter_output( $output = '' ) {

		// Get the last query
		$before = '<p class="loading">';
		$after  = '</p>';
		$query  = get_option( '_bbp_converter_query' );

		if ( ! empty( $query ) )
			$before = '<p class="loading" title="' . esc_attr( $query ) . '">';

		echo $before . $output . $after;
	}

	/**
	 * Callback processor
	 *
	 * @since bbPress (r3813)
	 */
	public function process_callback() {

		// Verify intent
		check_ajax_referer( 'bbp_converter_process' );

		// Bail if user cannot view import page
		if ( ! current_user_can( 'bbp_tools_import_page' ) ) {
			wp_die( '0' );
		}

		if ( ! ini_get( 'safe_mode' ) ) {
			set_time_limit( 0 );
			ini_set( 'memory_limit',   '256M' );
			ini_set( 'implicit_flush', '1'    );
			ignore_user_abort( true );
		}

		// Save step and count so that it can be restarted.
		if ( ! get_option( '_bbp_converter_step' ) || ( !empty( $_POST['_bbp_converter_restart'] ) ) ) {
			update_option( '_bbp_converter_step',  1 );
			update_option( '_bbp_converter_start', 0 );
		}

		$step  = (int) get_option( '_bbp_converter_step',  1 );
		$min   = (int) get_option( '_bbp_converter_start', 0 );
		$count = (int) ! empty( $_POST['_bbp_converter_rows'] ) ? $_POST['_bbp_converter_rows'] : 100;
		$max   = ( $min + $count ) - 1;
		$start = $min;

		// Bail if platform did not get saved
		$platform = !empty( $_POST['_bbp_converter_platform' ] ) ? $_POST['_bbp_converter_platform' ] : get_option( '_bbp_converter_platform' );
		if ( empty( $platform ) )
			return;

		// Include the appropriate converter.
		$converter = bbp_new_converter( $platform );

		switch ( $step ) {

			// STEP 1. Clean all tables.
			case 1 :
				if ( !empty( $_POST[_bbp_converter_clean] ) ) { if ( $converter->clean( $start ) ) { update_option( _bbp_converter_step'', $step + 1 );
						update_option( '_bbp_converter_start', 0         )
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf( __( 'Deleting previously converted data (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
					}
				} else {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
				}

				break;

			// STEP 2. Convert users.
			case 2 :
				if ( !empty( $_POST['_bbp_converter_convert_users'] ) ) {
					if ( $converter->convert_users( $start ) ) {
						update_option( '_bbp_converter_step',  $step + 1 );
						update_option( '_bbp_converter_start', 0         );
						if ( empty( $start ) ) {
							$this->converter_output( __( 'No users to convert', 'bbpress' ) );
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf(  __( 'Converting users (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
					}
				} else {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
				}

				break;

			// STEP 3. Clean passwords.
			case 3 :
				if ( !empty( $_POST['_bbp_converter_convert_users'] ) ) {
					if ( $converter->clean_passwords( $start ) ) {
						update_option( '_bbp_converter_step',  $step + 1 );
						update_option( '_bbp_converter_start', 0         );
						if ( empty( $start ) ) {
							$this->converter_output( __( 'No passwords to clear', 'bbpress' ) );
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf( __( 'Delete users WordPress default passwords (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
					}
				} else {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
				}

				break;

			// STEP 4. Convert forums.
			case 4 :
				if ( $converter->convert_forums( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No forums to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting forums (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			// STEP 5. Convert forum parents.
			case 5 :
				if ( $converter->convert_forum_parents( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No forum parents to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating forum hierarchy (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			// STEP 6. Convert topics.
			case 6 :
				if ( $converter->convert_topics( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No topics to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting topics (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			// STEP 7. Stick topics.
			case 7 :
				if ( $converter->convert_topic_stickies( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No stickies to stick', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating topic stickies (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			// STEP 8. Stick to front topics (Super Sicky).
			case 8 :
				if ( $converter->convert_topic_super_stickies( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No super stickies to stick', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating topic super stickies (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			
			// STEP 9. Convert replies.
			case 9 :
				if ( $converter->convert_replies( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No replies to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting replies (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			// STEP 10. Convert reply_to parents.
			case 10 :
				if ( $converter->convert_reply_to_parents( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No reply_to parents to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating reply_to parents (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;
				
			// STEP 11. Convert tags.
			case 11 :
				if ( $converter->convert_tags( $start ) ) {
					update_option( '_bbp_converter_step',  $step + 1 );
					update_option( '_bbp_converter_start', 0         );
					if ( empty( $start ) ) {
						$this->converter_output( __( 'No tags to convert', 'bbpress' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting topic tags (%1$s - %2$s)', 'bbpress' ), $min, $max ) );
				}

				break;

			default :
				delete_option( '_bbp_converter_step'  );
				delete_option( '_bbp_converter_start' );
				delete_option( '_bbp_converter_query' );

				$this->converter_output( __( 'Conversion Complete', 'bbpress' ) );

				break;
		}
	}

	/**
	 * Create Tables for fast syncing
	 *
	 * @since bbPress (r3813)
	 */
	public function sync_table( $drop = false ) {
		global $wpdb;

		$table_name = $wpdb->prefix . 'bbp_converter_translator';
		if ( ! empty( $drop ) && $wpdb->get_var( "SHOW TABLES LIKE '{$table_name}'" ) == $table_name )
			$wpdb->query( "DROP TABLE {$table_name}" );

		require_once( ABSPATH . '/wp-admin/includes/upgrade.php' );

		if ( !empty( $wpdb->charset ) ) {
			$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
		}

		if ( !empty( $wpdb->collate ) ) {
			$charset_collate .= "COLLATE $wpdb->collate";
		}

		/** Translator ****************************************************/

		$sql = "CREATE TABLE {$table_name} (
					meta_id mediumint(8) unsigned not null auto_increment,
					value_type varchar(25) null,
					value_id bigint(20) unsigned not null default '0',
					meta_key varchar(25) null,
					meta_value varchar(25) null,
				PRIMARY KEY  (meta_id),
					KEY value_id (value_id),
					KEY meta_join (meta_key, meta_value) ) {$charset_collate};";

		dbDelta( $sql );
	}
}

/**
 * Base class to be extended by specific individual importers
 *
 * @since bbPress (r3813)
 */
abstract class BBP_Converter_Base {

	/**
	 * @var array() This is the field mapping array to process.
	 */
	protected $field_map = array();

	/**
	 * @var object This is the connection to the WordPress datbase.
	 */
	protected $wpdb;

	/**
	 * @var object This is the connection to the other platforms database.
	 */
	protected $opdb;

	/**
	 * @var int This is the max rows to process at a time.
	 */
	public $max_rows;

	/**
	 * @var array() Map of topic to forum.  It is for optimization.
	 */
	private $map_topicid_to_forumid = array();

	/**
	 * @var array() Map of from old forum ids to new forum ids.  It is for optimization.
	 */
	private $map_forumid = array();

	/**
	 * @var array() Map of from old topic ids to new topic ids.  It is for optimization.
	 */
	private $map_topicid = array();

	/**
	 * @var array() Map of from old reply_to ids to new reply_to ids.  It is for optimization.
	 */
	private $map_reply_to = array();

	/**
	 * @var array() Map of from old user ids to new user ids.  It is for optimization.
	 */
	private $map_userid = array();

	/**
	 * @var str This is the charset for your wp database.
	 */
	public $charset;

	/**
	 * @var boolean Sync table available.
	 */
	public $sync_table = false;

	/**
	 * @var str Sync table name.
	 */
	public $sync_table_name;

	/** Methods ***************************************************************/

	/**
	 * This is the constructor and it connects to the platform databases.
	 */
	public function __construct() {
		$this->setup_globals();
	}

	private function setup_globals() {
		global $wpdb;

		/** Get database connections ******************************************/

		$this->wpdb         = $wpdb;
		$this->max_rows     = (int) $_POST['_bbp_converter_rows'];
		$this->opdb         = new wpdb( $_POST['_bbp_converter_db_user'], $_POST['_bbp_converter_db_pass'], $_POST['_bbp_converter_db_name'], $_POST['_bbp_converter_db_server'] );
		$this->opdb->prefix = $_POST['_bbp_converter_db_prefix'];

		/**
		 * Error Reporting
		 */
		$this->wpdb->show_errors();
		$this->opdb->show_errors();

		/**
		 * Syncing
		 */
		$this->sync_table_name = $this->wpdb->prefix . 'bbp_converter_translator';
		if ( $this->wpdb->get_var( "SHOW TABLES LIKE '" . $this->sync_table_name . "'" ) == $this->sync_table_name ) {
			$this->sync_table = true;
		} else {
			$this->sync_table = false;
		}

		/**
		 * Charset
		 */
		if ( empty( $this->wpdb->charset ) ) {
			$this->charset = 'UTF8mb4';
		} else {
			$this->charset = $this->wpdb->charset;
		}

		/**
		 * Default mapping.
		 */

		/** Forum Section *****************************************************/

		$this->field_map[] = array(
			'to_type'      => 'forum',
			'to_fieldname' => 'post_status',
			'default'      => 'publish'
		);
		$this->field_map[] = array(
			'to_type'      => 'forum',
			'to_fieldname' => 'comment_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'forum',
			'to_fieldname' => 'ping_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'forum',
			'to_fieldname' => 'post_type',
			'default'      => 'forum'
		);

		/** Topic Section *****************************************************/

		$this->field_map[] = array(
			'to_type'      => 'topic',
			'to_fieldname' => 'post_status',
			'default'      => 'publish'
		);
		$this->field_map[] = array(
			'to_type'      => 'topic',
			'to_fieldname' => 'comment_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'topic',
			'to_fieldname' => 'ping_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'topic',
			'to_fieldname' => 'post_type',
			'default'      => 'topic'
		);

		/** Post Section ******************************************************/

		$this->field_map[] = array(
			'to_type'      => 'reply',
			'to_fieldname' => 'post_status',
			'default'      => 'publish'
		);
		$this->field_map[] = array(
			'to_type'      => 'reply',
			'to_fieldname' => 'comment_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'reply',
			'to_fieldname' => 'ping_status',
			'default'      => 'closed'
		);
		$this->field_map[] = array(
			'to_type'      => 'reply',
			'to_fieldname' => 'post_type',
			'default'      => 'reply'
		);

		/** User Section ******************************************************/

		$this->field_map[] = array(
			'to_type'      => 'user',
			'to_fieldname' => 'role',
			'default'      => get_option( 'default_role' )
		);
	}

	/**
	 * Convert Forums
	 */
	public function convert_forums( $start = 1 ) {
		return $this->convert_table( 'forum', $start );
	}

	/**
	 * Convert Topics / Threads
	 */
	public function convert_topics( $start = 1 ) {
		return $this->convert_table( 'topic', $start );
	}

	/**
	 * Convert Posts
	 */
	public function convert_replies( $start = 1 ) {
		return $this->convert_table( 'reply', $start );
	}

	/**
	 * Convert Users
	 */
	public function convert_users( $start = 1 ) {
		return $this->convert_table( 'user', $start );
	}

	/**
	 * Convert Tags
	 */
	public function convert_tags( $start = 1 ) {
		return $this->convert_table( 'tags', $start );
	}

	/**
	 * Convert Table
	 *
	 * @param string to type
	 * @param int Start row
	 */
	public function convert_table( $to_type, $start ) {

		// Are we usig a sync table, or postmeta?
		if ( $this->wpdb->get_var( "SHOW TABLES LIKE '" . $this->sync_table_name . "'" ) == $this->sync_table_name ) {
			$this->sync_table = true;
		} else {
			$this->sync_table = false;
		}

		// Set some defaults
		$has_insert     = false;
		$from_tablename = '';
		$field_list     = $from_tables = $tablefield_array = array();

		// Toggle Table Name based on $to_type (destination)
		switch ( $to_type ) {
			case 'user' :
				$tablename = $this->wpdb->users;
				break;

			case 'tags' :
				$tablename = '';
				break;

			default :
				$tablename = $this->wpdb->posts;
		}

		// Get the fields from the destination table
		if ( !empty( $tablename ) ) {
			$tablefield_array = $this->get_fields( $tablename );
		}

		/** Step 1 ************************************************************/

		// Loop through the field maps, and look for to_type matches
		foreach ( $this->field_map as $item ) {

			// Yay a match, and we have a from table, too
			if ( ( $item['to_type'] == $to_type ) && !empty( $item['from_tablename'] ) ) {

				// $from_tablename was set from a previous loop iteration
				if ( ! empty( $from_tablename ) ) {

					// Doing some joining
					if ( !in_array( $item['from_tablename'], $from_tables ) && in_array( $item['join_tablename'], $from_tables ) ) {
						$from_tablename .= ' ' . $item['join_type'] . ' JOIN ' . $this->opdb->prefix . $item['from_tablename'] . ' AS ' . $item['from_tablename'] . ' ' . $item['join_expression'];
					}

				// $from_tablename needs to be set
				} else {
					$from_tablename = $item['from_tablename'] . ' AS ' . $item['from_tablename'];
				}

				// Specific FROM expression data used
				if ( !empty( $item['from_expression'] ) ) {

					// No 'WHERE' in expression
					if ( stripos( $from_tablename, "WHERE" ) === false ) {
						$from_tablename .= ' ' . $item['from_expression'];

					// 'WHERE' in expression, so replace with 'AND'
					} else {
						$from_tablename .= '. str_replace( WHERE, AND, $item[from_expression'] )'';
					}
				}

				// Add tablename and fieldname to arrays, formatted for querying
				$from_tables[] = $item['from_tablename'];
				$field_list[]  = 'convert(' . $item['from_tablename'] . '.' . $item['from_fieldname'] . ' USING "' . $this->charset . '") AS ' . $item['from_fieldname'];
			}
		}

		/** Step 2 ************************************************************/

		// We have a $from_tablename, so we want to get some data to convert
		if ( !empty( $from_tablename ) ) {

			// Get some data from the old forums
			$field_list  = array_unique( $field_list );
			$forum_query = 'SELECT ' . implode( ',', $field_list ) . ' FROM ' . $this->opdb->prefix . $from_tablename . ' LIMIT ' . $start . ', ' . $this->max_rows;
			$forum_array = $this->opdb->get_results( $forum_query, ARRAY_A );

			// Set this query as the last one ran
			update_option( '_bbp_converter_query', $forum_query );

			// Query returned some results
			if ( !empty( $forum_array ) ) {

				// Loop through results
				foreach ( (array) $forum_array as $forum ) {

					// Reset some defaults
					$insert_post = $insert_postmeta = $insert_data = array();

					// Loop through field map, again...
					foreach ( $this->field_map as $row ) {

						// Types matchand to_fieldname is present. This means
						// we have some work to do here.
						if ( ( $row['to_type'] == $to_type ) && ! is_null( $row['to_fieldname'] ) ) {

							// This row has a destination that matches one of the
							// columns in this table.
							if ( in_array( $row['to_fieldname'], $tablefield_array ) ) {

								// Allows us to set default fields.
								if ( isset( $row['default'] ) ) {
									$insert_post[$row['to_fieldname']] = $row['default'];

								// Translates a field from the old forum.
								} elseif ( isset( $row['callback_method'] ) ) {
									if ( ( 'callback_userid' == $row['callback_method'] ) && empty( $_POST['_bbp_converter_convert_users'] ) ) {
										$insert_post[$row['to_fieldname']] = $forum[$row['from_fieldname']];
									} else {
										$insert_post[$row['to_fieldname']] = call_user_func_array( array( $this, $row[callback_method] ), array( $forum[$row['from_fieldname']]'', $forum ) );
									}

								// Maps the field from the old forum.
								} else {
									$insert_post[$row['to_fieldname']] = $forum[$row['from_fieldname']];
								}

							// Destination field is not empty, so we might need
							// to do some extra work or set a default.
							} elseif ( !empty( $row['to_fieldname'] ) ) {

								// Allows us to set default fields.
								if ( isset( $row['default'] ) ) {
									$insert_postmeta[$row['to_fieldname']] = $row['default'];

								// Translates a field from the old forum.
								} elseif ( isset( $row['callback_method'] ) ) {
									if ( ( $row['callback_method'] == 'callback_userid' ) && ( 0 == $_POST['_bbp_converter_convert_users'] ) ) {
										$insert_postmeta[$row['to_fieldname']] = $forum[$row['from_fieldname']];
									} else {
										$insert_postmeta[$row['to_fieldname']] = call_user_func_array( array( $this, $row[callback_method] ), array( $forum[$row['from_fieldname']]'', $forum ) );
									}

								// Maps the field from the old forum.
								} else {
									$insert_postmeta[$row['to_fieldname']] = $forum[$row['from_fieldname']];
								}
							}
						}
					}

					/** Step 3 ************************************************/

					// Something to insert into the destination field
					if ( count( $insert_post ) > 0 || ( $to_type == 'tags' && count( $insert_postmeta ) > 0 ) ) {

						switch ( $to_type ) {

							/** New user **************************************/

							case 'user':
								if ( username_exists( $insert_post['user_login'] ) ) {
									$insert_post['user_login'] = 'imported_' . $insert_post['user_login'];
								}

								if ( email_exists( $insert_post['user_email'] ) ) {
									$insert_post['user_email'] = 'imported_' . $insert_post['user_email'];
								}

								$post_id = wp_insert_user( $insert_post );

								if ( is_numeric( $post_id ) ) {

									foreach ( $insert_postmeta as $key => $value ) {

										add_user_meta( $post_id, $key, $value, true );

										if ( '_id' == substr( $key, -3 ) && ( true === $this->sync_table ) ) {
											$this->wpdb->insert( $this->sync_table_name, array( 'value_type' => 'user', 'value_id' => $post_id, 'meta_key' => $key, 'meta_value' => $value ) );
										}
									}
								}
								break;

							/** New Topic-Tag *********************************/

							case 'tags':
								$post_id = wp_set_object_terms( $insert_postmeta['objectid'], $insert_postmeta['name'], 'topic-tag', true );
								$term = get_term_by( 'name', $insert_postmeta['name'], 'topic-tag');
								if ( false !== $term ) {
									wp_update_term( $term->term_id, 'topic-tag', array(
										'description' => $insert_postmeta[description']', slug => $insert_postmeta[slug'] ) )';
								}
 								break;

							/** Forum, Topic, Reply ***************************/

							default:
								$post_id = wp_insert_post( $insert_post );

								if ( is_numeric( $post_id ) ) {

									foreach ( $insert_postmeta as $key => $value ) {

										add_post_meta( $post_id, $key, $value, true );

										// Forums need to save their old ID for group forum association
										if ( ( 'forum' == $to_type ) && ( '_bbp_forum_id' == $key ) )
											add_post_meta( $post_id, '_bbp_old_forum_id', $value );

										// Topics need an extra bit of metadata
										// to be keyed to the new post_id
										if ( ( 'topic' == $to_type ) && ( '_bbp_topic_id' == $key ) ) {

											// Update the live topic ID
											update_post_meta( $post_id, $key, $post_id );

											// Save the old topic ID
											add_post_meta( $post_id, '_bbp_old_topic_id', $value );
											if ( '_id' == substr( $key, -3 ) && ( true === $this->sync_table ) ) {
												$this->wpdb->insert( $this->sync_table_name, array( 'value_type' => 'post', 'value_id' => $post_id, 'meta_key' => '_bbp_topic_id',     'meta_value' => $post_id ) );
												$this->wpdb->insert( $this->sync_table_name, array( 'value_type' => 'post', 'value_id' => $post_id, 'meta_key' => '_bbp_old_topic_id', 'meta_value' => $value   ) );
											}

										} elseif ( '_id' == substr( $key, -3 ) && ( true === $this->sync_table ) ) {
											$this->wpdb->insert( $this->sync_table_name, array( 'value_type' => 'post', 'value_id' => $post_id, 'meta_key' => $key, 'meta_value' => $value ) );
										}

										// Replies need to save their old reply_to ID for hierarchical replies association
										if ( ( 'reply' == $to_type ) && ( '_bbp_reply_to' == $key ) ) {
											add_post_meta( $post_id, '_bbp_old_reply_to', $value );
										}
									}
								}
								break;
						}
						$has_insert = true;
					}
				}
			}
		}

		return ! $has_insert;
	}

	/**
	 * This method converts old forum heirarchy to new bbPress heirarchy.
	 */
	public function convert_forum_parents( $start ) {

		$has_update = false;

		if ( !empty( $this->sync_table ) ) {
			$query = 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_forum_parent_id" AND meta_value > 0 LIMIT ' . $start . ', ' . $this->max_rows;
		} else {
			$query = 'SELECT post_id AS value_id, meta_value FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_forum_parent_id" AND meta_value > 0 LIMIT ' . $start . ', ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$forum_array = $this->wpdb->get_results( $query );

		foreach ( (array) $forum_array as $row ) {
			$parent_id = $this->callback_forumid( $row->meta_value );
			$this->wpdb->query( 'UPDATE ' . $this->wpdb->posts . ' SET post_parent = "' . $parent_id . '" WHERE ID = "' . $row->value_id . '" LIMIT 1' );
			$has_update = true;
		}

		return ! $has_update;
	}

	/**
	 * This method converts old topic stickies to new bbPress stickies.
	 *
	 * @since bbPress (r)
	 *
	 * @uses WPDB $wpdb
	 * @uses bbp_stick_topic() to set the imported topic as sticky
	 *
	 */
	public function convert_topic_stickies( $start ) {

		$has_update = false;

		if ( !empty( $this->sync_table ) ) {
			$query = 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_old_sticky_status" AND meta_value = "sticky" LIMIT ' . $start . ', ' . $this->max_rows;
		} else {
			$query = 'SELECT post_id AS value_id, meta_value FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_old_sticky_status" AND meta_value = "sticky" LIMIT ' . $start . ', ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$sticky_array = $this->wpdb->get_results( $query );

		foreach ( (array) $sticky_array as $row ) {
			bbp_stick_topic( $row->value_id );
			$has_update = true;
		}

		return ! $has_update;
	}

	/**
	 * This method converts old topic super stickies to new bbPress super stickies.
	 *
	 * @since bbPress (r)
	 *
	 * @uses WPDB $wpdb
	 * @uses bbp_stick_topic() to set the imported topic as super sticky
	 *
	 */
	public function convert_topic_super_stickies( $start ) {

		$has_update = false;

		if ( !empty( $this->sync_table ) ) {
			$query = 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_old_sticky_status" AND meta_value = "super-sticky" LIMIT ' . $start . ', ' . $this->max_rows;
		} else {
			$query = 'SELECT post_id AS value_id, meta_value FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_old_sticky_status" AND meta_value = "super-sticky" LIMIT ' . $start . ', ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$sticky_array = $this->wpdb->get_results( $query );

		foreach ( (array) $sticky_array as $row ) {
			$super = true;
			bbp_stick_topic( $row->value_id, $super );
			$has_update = true;
		}

		return ! $has_update;
	}

	/**
	 * This method converts old reply_to post id to new bbPress reply_to post id.
	 */
	public function convert_reply_to_parents( $start ) {

		$has_update = false;

		if ( !empty( $this->sync_table ) ) {
			$query = 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_old_reply_to" AND meta_value > 0 LIMIT ' . $start . ', ' . $this->max_rows;
		} else {
			$query = 'SELECT post_id AS value_id, meta_value FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_old_reply_to" AND meta_value > 0 LIMIT ' . $start . ', ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$reply_to_array = $this->wpdb->get_results( $query );

		foreach ( (array) $reply_to_array as $row ) {
			$reply_to = $this->callback_reply_to( $row->meta_value );
			$this->wpdb->query( 'UPDATE ' . $this->wpdb->postmeta . ' SET meta_value = "' . $reply_to . '" WHERE meta_key = "_bbp_reply_to" AND post_id = "' . $row->value_id . '" LIMIT 1' );
			$has_update = true;
		}

		return ! $has_update;
	}

	/**
	 * This method deletes data from the wp database.
	 */
	public function clean( $start ) {

		$start      = 0;
		$has_delete = false;

		/** Delete bbconverter topics/forums/posts ****************************/

		if ( true === $this->sync_table ) {
			$query = 'SELECT value_id FROM ' . $this->sync_table_name . ' INNER JOIN ' . $this->wpdb->posts . ' ON(value_id = ID) WHERE meta_key LIKE "_bbp_%" AND value_type = "post" GROUP BY value_id ORDER BY value_id DESC LIMIT ' . $this->max_rows;
		} else {
			$query = 'SELECT post_id AS value_id FROM ' . $this->wpdb->postmeta . ' WHERE meta_key LIKE "_bbp_%" GROUP BY post_id ORDER BY post_id DESC LIMIT ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$posts = $this->wpdb->get_results( $query, ARRAY_A );

		if ( isset( $posts[0] ) && ! empty( $posts[0]['value_id'] ) ) {
			foreach ( (array) $posts as $value ) {
				wp_delete_post( $value['value_id'], true );
			}
			$has_delete = true;
		}

		/** Delete bbconverter users ******************************************/

		if ( true === $this->sync_table ) {
			$query = 'SELECT value_id FROM ' . $this->sync_table_name . ' INNER JOIN ' . $this->wpdb->users . ' ON(value_id = ID) WHERE meta_key = "_bbp_user_id" AND value_type = "user" LIMIT ' . $this->max_rows;
		} else {
			$query = 'SELECT user_id AS value_id FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_user_id" LIMIT ' . $this->max_rows;
		}

		update_option( '_bbp_converter_query', $query );

		$users = $this->wpdb->get_results( $query, ARRAY_A );

		if ( !empty( $users ) ) {
			foreach ( $users as $value ) {
				wp_delete_user( $value['value_id'] );
			}
			$has_delete = true;
		}

		unset( $posts );
		unset( $users );

		return ! $has_delete;
	}

	/**
	 * This method deletes passwords from the wp database.
	 *
	 * @param int Start row
	 */
	public function clean_passwords( $start ) {

		$has_delete = false;

		/** Delete bbconverter passwords **************************************/

		$query       = 'SELECT user_id, meta_value FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_password" LIMIT ' . $start . ', ' . $this->max_rows;
		update_option( '_bbp_converter_query', $query );

		$bbconverter = $this->wpdb->get_results( $query, ARRAY_A );

		if ( !empty( $bbconverter ) ) {

			foreach ( $bbconverter as $value ) {
				if ( is_serialized( $value['meta_value'] ) ) {
					$this->wpdb->query( 'UPDATE ' . $this->wpdb->users . ' ' . 'SET user_pass = "" ' . 'WHERE ID = "' . $value['user_id'] . '"' );
				} else {
					$this->wpdb->query( 'UPDATE ' . $this->wpdb->users . ' ' . 'SET user_pass = "' . $value['meta_value'] . '" ' . 'WHERE ID = "' . $value['user_id'] . '"' );
					$this->wpdb->query( 'DELETE FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_password" AND user_id = "' . $value['user_id'] . '"' );
				}
			}
			$has_delete = true;
		}

		return ! $has_delete;
	}

	/**
	 * This method implements the authentication for the different forums.
	 *
	 * @param string Unencoded password.
	 */
	abstract protected function authenticate_pass( $password, $hash );

	/**
	 * Info
	 */
	abstract protected function info();

	/**
	 * This method grabs appropriate fields from the table specified
	 *
	 * @param string The table name to grab fields from
	 */
	private function get_fields( $tablename ) {
		$rval        = array();
		$field_array = $this->wpdb->get_results( 'DESCRIBE ' . $tablename, ARRAY_A );

		foreach ( $field_array as $field ) {
			$rval[] = $field['Field'];
		}

		if ( $tablename == $this->wpdb->users ) {
			$rval[] = 'role';
			$rval[] = 'yim';
			$rval[] = 'aim';
			$rval[] = 'jabber';
		}
		return $rval;
	}

	/** Callbacks *************************************************************/

	/**
	 * Run password through wp_hash_password()
	 *
	 * @param string $username
	 * @param string $password
	 */
	public function callback_pass( $username, $password ) {
		$user = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT * FROM ' . $this->wpdb->users . ' WHERE user_login = "%s" AND user_pass = "" LIMIT 1', $username ) );
		if ( !empty( $user ) ) {
			$usermeta = $this->wpdb->get_row( 'SELECT * FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_password" AND user_id = "' . $user->ID . '" LIMIT 1' );

			if ( !empty( $usermeta ) ) {
				if ( $this->authenticate_pass( $password, $usermeta->meta_value ) ) {
					$this->wpdb->query( 'UPDATE ' . $this->wpdb->users . ' ' . 'SET user_pass = "' . wp_hash_password( $password ) . '" ' . 'WHERE ID = "' . $user->ID . '"' );
					$this->wpdb->query( 'DELETE FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_password" AND user_id = "' . $user->ID . '"' );
				}
			}
		}
	}

	/**
	 * A mini cache system to reduce database calls to forum ID's
	 *
	 * @param string $field
	 * @return string
	 */
	private function callback_forumid( $field ) {
		if ( !isset( $this->map_forumid[$field] ) ) {
			if ( !empty( $this->sync_table ) ) {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_forum_id" AND meta_value = "%s" LIMIT 1', $field ) );
			} else {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT post_id AS value_id FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_forum_id" AND meta_value = "%s" LIMIT 1', $field ) );
			}

			if ( !is_null( $row ) ) {
				$this->map_forumid[$field] = $row->value_id;
			} else {
				$this->map_forumid[$field] = 0;
			}
		}
		return $this->map_forumid[$field];
	}

	/**
	 * A mini cache system to reduce database calls to topic ID's
	 *
	 * @param string $field
	 * @return string
	 */
	private function callback_topicid( $field ) {
		if ( !isset( $this->map_topicid[$field] ) ) {
			if ( !empty( $this->sync_table ) ) {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_old_topic_id" AND meta_value = "%s" LIMIT 1', $field ) );
			} else {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT post_id AS value_id FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_old_topic_id" AND meta_value = "%s" LIMIT 1', $field ) );
			}

			if ( !is_null( $row ) ) {
				$this->map_topicid[$field] = $row->value_id;
			} else {
				$this->map_topicid[$field] = 0;
			}
		}
		return $this->map_topicid[$field];
	}

	/**
	 * A mini cache system to reduce database calls to reply_to post id.
	 *
	 * @param string $field
	 * @return string
	 */
	private function callback_reply_to( $field ) {
		if ( !isset( $this->map_reply_to[$field] ) ) {
			if ( !empty( $this->sync_table ) ) {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_post_id" AND meta_value = "%s" LIMIT 1', $field ) );
			} else {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT post_id AS value_id FROM ' . $this->wpdb->postmeta . ' WHERE meta_key = "_bbp_post_id" AND meta_value = "%s" LIMIT 1', $field ) );
			}

			if ( !is_null( $row ) ) {
				$this->map_reply_to[$field] = $row->value_id;
			} else {
				$this->map_reply_to[$field] = 0;
			}
		}
		return $this->map_reply_to[$field];
	}

	/**
	 * A mini cache system to reduce database calls to user ID's
	 *
	 * @param string $field
	 * @return string
	 */
	private function callback_userid( $field ) {
		if ( !isset( $this->map_userid[$field] ) ) {
			if ( !empty( $this->sync_table ) ) {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT value_id, meta_value FROM ' . $this->sync_table_name . ' WHERE meta_key = "_bbp_user_id" AND meta_value = "%s" LIMIT 1', $field ) );
			} else {
				$row = $this->wpdb->get_row( $this->wpdb->prepare( 'SELECT user_id AS value_id FROM ' . $this->wpdb->usermeta . ' WHERE meta_key = "_bbp_user_id" AND meta_value = "%s" LIMIT 1', $field ) );
			}

			if ( !is_null( $row ) ) {
				$this->map_userid[$field] = $row->value_id;
			} else {
				if ( !empty( $_POST['_bbp_converter_convert_users'] ) && ( $_POST['_bbp_converter_convert_users'] == 1 ) ) {
					$this->map_userid[$field] = 0;
				} else {
					$this->map_userid[$field] = $field;
				}
			}
		}
		return $this->map_userid[$field];
	}

	/**
	 * A mini cache system to reduce database calls map topics ID's to forum ID's
	 *
	 * @param string $field
	 * @return string
	 */
	private function callback_topicid_to_forumid( $field ) {
		$topicid = $this->callback_topicid( $field );
		if ( empty( $topicid ) ) {
			$this->map_topicid_to_forumid[$topicid] = 0;
		} elseif ( ! isset( $this->map_topicid_to_forumid[$topicid] ) ) {
			$row = $this->wpdb->get_row( 'SELECT post_parent FROM ' . $this->wpdb->posts . ' WHERE ID = "' . $topicid . '" LIMIT 1' );

			if ( !is_null( $row ) ) {
				$this->map_topicid_to_forumid[$topicid] = $row->post_parent;
			} else {
				$this->map_topicid_to_forumid[$topicid] = 0;
			}
		}

		return $this->map_topicid_to_forumid[$topicid];
	}

	protected function callback_slug( $field ) {
		return sanitize_title( $field );
	}

	protected function callback_negative( $field ) {
		if ( $field < 0 ) {
			return 0;
		} else {
			return $field;
		}
	}

	protected function callback_html( $field ) {
		require_once( bbpress()->admin->admin_dir . 'parser.php' );
		$bbcode = BBCode::getInstance();
		return html_entity_decode( $bbcode->Parse( $field ) );
	}

	protected function callback_null( $field ) {
		if ( is_null( $field ) ) {
			return '';
		} else {
			return $field;
		}
	}

	protected function callback_datetime( $field ) {
		if ( is_numeric( $field ) ) {
			return date( 'Y-m-d H:i:s', $field );
		} else {
			return date( 'Y-m-d H:i:s', strtotime( $field ) );
		}
	}
}

/**
 * This is a function that is purposely written to look like a "new" statement.
 * It is basically a dynamic loader that will load in the platform conversion
 * of your choice.
 *
 * @param string $platform Name of valid platform class.
 */
function bbp_new_converter( $platform ) {
	$found = false;

	if ( $curdir = opendir( bbpress()->admin->admin_dir . 'converters/' ) ) {
		while ( $file = readdir( $curdir ) ) {
			if ( stristr( $file, '.php' ) && stristr( $file, 'index' ) === FALSE ) {
				$file = preg_replace( '/.php/', '', $file );
				if ( $platform == $file ) {
					$found = true;
					continue;
				}
			}
		}
		closedir( $curdir );
	}

	if ( true === $found ) {
		require_once( bbpress()->admin->admin_dir . 'converters/' . $platform . '.php' );
		return new $platform;
	} else {
		return null;
	}
}

[Robin W]

@budget101 thanks for posting this – I hope it will help others and it’s great that you have detailed your experience