Wordpress - import post connections from CSV file (with RS CSV Importer and Posts 2 Posts plugins)

rscsvimporter_replace_save_post.php

<?php
/*
Plugin Name: Replace save_post method of Really Simple CSV Importer (customized)
Description: This is an example add-on.
Author: Takuro Hishikawa, 
Version: 0.2
*/

class rscsvimporter_replace_save_post {
	// singleton instance
	private static $instance;
	
	public static function instance() {
		if ( isset( self::$instance ) )
			return self::$instance;
		
		self::$instance = new rscsvimporter_replace_save_post;
		self::$instance->run_init();
		return self::$instance;
	}
	
	public function __construct() {
		/** Do nothing **/
	}
	
	protected function run_init() {
		add_action( 'init', array( $this, 'add_filter' ) );
	}
	
	public function add_filter() {
		add_filter( 'really_simple_csv_importer_class', array( $this, 'return_class'));
	}
	
	public function return_class() {
		return get_class($this);
	}
	
	public function save_post($post, $meta, $terms, $thumbnail, $is_update) {
		
		if (!class_exists('wp_post_helper',false)) {
			return false;
		}
		$ph = new wp_post_helper($post);
		
		foreach ($meta as $key => $value) {
			// Add custom field if the given key already exists.
			// The default of third variable in Really Simple CSV Importer is true
			$ph->add_meta($key, $value, true);
		}

		foreach ($terms as $key => $value) {
			$ph->add_terms($key, $value);
		}
		
		if ($thumbnail) $ph->add_media($thumbnail,'','','',true);
		
		if ($is_update)
			$result = $ph->update();
		else
			$result = $ph->insert();
		

		// Custom code below


	  //connected posts' slugs are delimited with ';' and imported as custom field in separate column with 'sudexmb_regs_specs' header
		if ($result) {
			global $wpdb;
			if (isset($meta['sudexmb_regs_specs'])) {
				$spec_slugs = explode(';',$meta['sudexmb_regs_specs']);
				$debugtext = '';
				foreach ($spec_slugs as $spec_slug) {
					$spec_slug = preg_replace('/\./','-', $spec_slug);
					$spec_id = $wpdb->get_var("SELECT ID FROM $wpdb->posts WHERE post_name = '$spec_slug' AND post_type = 'speciality'"); 
					//$debugtext = $debugtext.' // found spec slug:'.$spec_slug.'; post ID: '.$ph->postid().'; spec id:'.$spec_id;
					//$ph->add_meta('sudexmb_regs_specs', $debugtext, true);
					if ($spec_id) {
						p2p_type( 'specialities_to_registry' )->connect( $spec_id, $ph->postid(), array(
							'date' => current_time('mysql')
						) );
					}
				}
			}
		}
		
		unset($ph);
		
		return $result;
		
	}
	
}

$rscsvimporter_replace_save_post = rscsvimporter_replace_save_post::instance();

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