<?php

class APVC_Migration extends APVC_Query {

	public function __construct() {
		add_action( 'apvc_start_migration',  array( $this, 'start_migration' ) );
	}

	public function is_migrating() {

		$migration_status = get_option( 'apvc_migration_process', 'completed' );
		if( 'inprogress' === $migration_status ){
			return true;
		}

		return false;
	}

	public function start_migration() {
		global $wpdb;

		$history_table = $wpdb->prefix . 'avc_page_visit_history';
		$old_records = $wpdb->get_results( 'SELECT article_id as id, COUNT(*) AS count FROM '.$history_table.' GROUP BY article_id' );
		if( !empty( $old_records ) ){
			foreach( $old_records as $record ){
				update_post_meta( $record->id, 'apvc_starting_count', $record->count );
			}
		}
		update_option( 'apvc_migration_process', 'completed' );

	}

}