/magmi/plugins/base/itemprocessors/defaultvalues/00_default_values.php

<?php
/**
 * Class SampleItemProcessor
 * @author dweeves
 *
 * This class is a sample for item processing   
*/ 
class DefaultValuesItemProcessor extends Magmi_ItemProcessor
{

	protected $_dset=array();
	protected $_dcols=array();
	
    public function getPluginInfo()
    {
        return array(
            "name" => "Default Values setter",
            "author" => "Dweeves",
            "version" => "0.0.5",
        	"url" => "http://sourceforge.net/apps/mediawiki/magmi/index.php?title=Default_Values_setter"
        );
    }
	
	/**
	 * you can add/remove columns for the item passed since it is passed by reference
	 * @param Magmi_Engine $mmi : reference to magmi engine instance (convenient to perform database operations)
	 * @param unknown_type $item : modifiable reference to item before import
	 * the $item is a key/value array with column names as keys and values as read from csv file.
	 * @return bool : 
	 * 		true if you want the item to be imported after your custom processing
	 * 		false if you want to skip item import after your processing
	 */
	
	
	public function processItemBeforeId(&$item,$params=null)
	{
		foreach($this->_dcols as $col)
		{
			$item[$col]=$this->_dset[$col];
		}
		return true;
	}
	
	public function processItemAfterId(&$item,$params=null)
	{
		return true;
	}
	
	/*
	public function processItemException(&$item,$params=null)
	{
		
	}*/
	
	public function initialize($params)
	{
		foreach($params as $k=>$v)
		{
			if(preg_match_all("/^DEFAULT:(.*)$/",$k,$m) && $k!="DEFAULT:columnlist")
			{
				$this->_dset[$m[1][0]]=$params[$k];
			}
		}
	}
	
	public function getPluginParams($params)
	{
		$pp=array();
		foreach($params as $k=>$v)
		{
			if(preg_match("/^DEFAULT:.*$/",$k))
			{
				$pp[$k]=$v;
			}
		}	
		return $pp;
	}
	
	
	public function processColumnList(&$cols,$params=null)
	{
		$dcols=array_diff(array_keys($this->_dset),array_intersect($cols,array_keys($this->_dset)));
		foreach($dcols as $col)
		{
			if(!empty($this->_dset[$col]))
			{
				$cols[]=$col;
				$this->_dcols[]=$col;								
			}
		}
		$this->log("Adding Columns ".implode(",",$dcols),"startup");
		
		return true;
	}
	
static public function getCategory()
	{
		return "Input Data Preprocessing";
	}
}