<?php
/**
 * @copyright Copyright (c) 2013 2amigOS! Consulting Group LLC
 * @link http://2amigos.us
 * @license http://www.opensource.org/licenses/bsd-license.php New BSD License
 */

Yii::import('yiiwheels.widgets.grid.operations.WhCountOfTypeOperation');

/**
 *
 * WhPercentOfTypeOperation class
 *
 * Renders a summary based on the percent count of specified types. For example, if a value has a type 'blue', this class will
 * count the percentage number of times the value 'blue' has on that column.
 *
* @author Antonio Ramirez <amigo.cobos@gmail.com>
 * @package YiiWheels.widgets.grid.operations
 * @uses YiiWheels.widgets.grid.operations.WhCountOfTypeOperation
 */
class WhPercentOfTypeOperation extends WhCountOfTypeOperation
{
    /**
     * @var string $typeTemplate
     * @see TbCountOfTypeOperation
     */
    public $typeTemplate = '{label}({value}%)';

    /**
     * @var integer $_total holds the total sum of the values. Required to get the percentage.
     */
    protected $_total;


    /**
     * @return mixed|void
     * @see TbOperation
     */
    public function displaySummary()
    {
        $typesResults = array();

        foreach ($this->types as $type) {
            if (!isset($type['value'])) {
                $type['value'] = 0;
            }

            $type['value'] = $this->getTotal() ? number_format((float)($type['value'] / $this->getTotal()) * 100, 1)
                : 0;
            $typesResults[] = strtr(
                $this->typeTemplate,
                array('{label}' => $type['label'], '{value}' => $type['value'])
            );
        }

        echo strtr($this->template, array('{label}' => $this->label, '{types}' => implode(' ', $typesResults)));
    }

    /**
     * Returns the total of types
     * @return int holds
     */
    protected function getTotal()
    {
        if (null == $this->_total) {
            $this->_total = 0;
            foreach ($this->types as $type) {
                if (isset($type['value'])) {
                    $this->_total += $type['value'];
                }
            }
        }
        return $this->_total;
    }
}
