BBP_Converter::process_callback()

	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 = ! empty( $_POST['_bbp_converter_rows'] ) ? min( max( (int) $_POST['_bbp_converter_rows'], 1 ), 5000 ) : 100;
		$max   = ( $min + $count ) - 1;
		$start = $min;

		// Bail if platform did not get saved
		$platform = !empty( $_POST['_bbp_converter_platform' ] ) ? sanitize_text_field( $_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         );
						$this->sync_table( true );
						if ( empty( $start ) ) {
							$this->converter_output( __( 'No data to clean', 'buddyboss' ) );
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf( __( 'Deleting previously converted data (%1$s - %2$s)', 'buddyboss' ), $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', 'buddyboss' ) );
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf(  __( 'Converting users (%1$s - %2$s)', 'buddyboss' ), $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', 'buddyboss' ) );
						}
					} else {
						update_option( '_bbp_converter_start', $max + 1 );
						$this->converter_output( sprintf( __( 'Delete users WordPress default passwords (%1$s - %2$s)', 'buddyboss' ), $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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting forums (%1$s - %2$s)', 'buddyboss' ), $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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating forum hierarchy (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 6. Convert discussions.
			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 discussions to convert', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting discussions (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 7. Stick discussions.
			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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating discussion stickies (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 8. Stick to front discussion (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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating discussion super stickies (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 9. Convert tags.
			case 9 :
				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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting discussion tags (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 10. Convert replies.
			case 10 :
				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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Converting replies (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

			// STEP 11. Convert reply_to parents.
			case 11 :
				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', 'buddyboss' ) );
					}
				} else {
					update_option( '_bbp_converter_start', $max + 1 );
					$this->converter_output( sprintf( __( 'Calculating reply_to parents (%1$s - %2$s)', 'buddyboss' ), $min, $max ) );
				}

				break;

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

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

				break;
		}
	}