woocommerce/classes/shipping/shipping-flat_rate.php

<?php
/**
 * Flat Rate Shipping Method
 * 
 * A simple shipping method for a flat fee per item or per order
 *
 * @class 		flat_rate
 * @package		WooCommerce
 * @category	Shipping
 * @author		WooThemes
 */  
class flat_rate extends woocommerce_shipping_method {
	
	public function __construct() { 
        $this->id 			= 'flat_rate';
        $this->enabled		= get_option('woocommerce_flat_rate_enabled');
		$this->title 		= get_option('woocommerce_flat_rate_title');
		$this->availability = get_option('woocommerce_flat_rate_availability');
		$this->countries 	= get_option('woocommerce_flat_rate_countries');
		$this->type 		= get_option('woocommerce_flat_rate_type');
		$this->tax_status	= get_option('woocommerce_flat_rate_tax_status');
		$this->cost 		= get_option('woocommerce_flat_rate_cost');
		$this->fee 			= get_option('woocommerce_flat_rate_handling_fee'); 
		
		add_action('woocommerce_update_options', array(&$this, 'process_admin_options'));
		add_option('woocommerce_flat_rate_availability', 'all');
		add_option('woocommerce_flat_rate_title', 'Flat Rate');
		add_option('woocommerce_flat_rate_tax_status', 'taxable');
    } 
    
    public function calculate_shipping() {
    	
    	$_tax = &new woocommerce_tax();
    	
    	$this->shipping_total 	= 0;
		$this->shipping_tax 	= 0;
    	
    	if ($this->type=='order') :
			// Shipping for whole order
			$this->shipping_total = $this->cost + $this->get_fee( $this->fee, woocommerce_cart::$cart_contents_total );
			
			if ( get_option('woocommerce_calc_taxes')=='yes' && $this->tax_status=='taxable' ) :
				
				$rate = $_tax->get_shipping_tax_rate();
				if ($rate>0) :
					$tax_amount = $_tax->calc_shipping_tax( $this->shipping_total, $rate );

					$this->shipping_tax = $this->shipping_tax + $tax_amount;
				endif;
			endif;
		else :
			// Shipping per item
			if (sizeof(woocommerce_cart::$cart_contents)>0) : foreach (woocommerce_cart::$cart_contents as $item_id => $values) :
				$_product = $values['data'];
				if ($_product->exists() && $values['quantity']>0) :
					
					$item_shipping_price = ($this->cost + $this->get_fee( $this->fee, $_product->get_price() )) * $values['quantity'];
					
					// Only count 'psysical' products
					if ($_product->is_type( 'simple' ) || $_product->is_type( 'variable' )) :
						
						$this->shipping_total = $this->shipping_total + $item_shipping_price;
	
						if ( $_product->is_shipping_taxable() && $this->tax_status=='taxable' ) :
						
							$rate = $_tax->get_shipping_tax_rate( $_product->tax_class );
							
							if ($rate>0) :
							
								$tax_amount = $_tax->calc_shipping_tax( $item_shipping_price, $rate );
							
								$this->shipping_tax = $this->shipping_tax + $tax_amount;
							
							endif;
						
						endif;
					
					endif;
					
				endif;
			endforeach; endif;
		endif;			
    } 
    
    public function admin_options() {
    	?>
    	<h3><?php _e('Flat Rates', 'woothemes'); ?></h3>
    	<p><?php _e('Flat rates let you define a standard rate per item, or per order.', 'woothemes'); ?></p>
    	<table class="form-table">
	    	<tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Enable/disable', 'woothemes') ?></th>
		        <td class="forminp">
		        	<fieldset><legend class="screen-reader-text"><span><?php _e('Enable/disable', 'woothemes') ?></span></legend>
						<label for="woocommerce_flat_rate_enabled">
						<input name="woocommerce_flat_rate_enabled" id="woocommerce_flat_rate_enabled" type="checkbox" value="1" <?php checked(get_option('woocommerce_flat_rate_enabled'), 'yes'); ?> /> <?php _e('Enable Flat Rate', 'woothemes') ?></label><br>
					</fieldset>
		        </td>
		    </tr>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Method Title', 'woothemes') ?></th>
		        <td class="forminp">
			        <input type="text" name="woocommerce_flat_rate_title" id="woocommerce_flat_rate_title" style="min-width:50px;" value="<?php if ($value = get_option('woocommerce_flat_rate_title')) echo $value; else echo 'Flat Rate'; ?>" /> <span class="description"><?php _e('This controls the title which the user sees during checkout.', 'woothemes') ?></span>
		        </td>
		    </tr>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Type', 'woothemes') ?></th>
		        <td class="forminp">
			        <select name="woocommerce_flat_rate_type" id="woocommerce_flat_rate_type" style="min-width:100px;">
			            <option value="order" <?php if (get_option('woocommerce_flat_rate_type') == 'order') echo 'selected="selected"'; ?>><?php _e('Per Order', 'woothemes'); ?></option>
			            <option value="item" <?php if (get_option('woocommerce_flat_rate_type') == 'item') echo 'selected="selected"'; ?>><?php _e('Per Item', 'woothemes'); ?></option>
			        </select>
		        </td>
		    </tr>
		    <?php $_tax = new woocommerce_tax(); ?>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Tax Status', 'woothemes') ?></th>
		        <td class="forminp">
		        	<select name="woocommerce_flat_rate_tax_status">
		        		<option value="taxable" <?php if (get_option('woocommerce_flat_rate_tax_status')=='taxable') echo 'selected="selected"'; ?>><?php _e('Taxable', 'woothemes'); ?></option>
		        		<option value="none" <?php if (get_option('woocommerce_flat_rate_tax_status')=='none') echo 'selected="selected"'; ?>><?php _e('None', 'woothemes'); ?></option>
		        	</select>
		        </td>
		    </tr>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Cost', 'woothemes') ?></th>
		        <td class="forminp">
			        <input type="text" name="woocommerce_flat_rate_cost" id="woocommerce_flat_rate_cost" style="min-width:50px;" value="<?php if ($value = get_option('woocommerce_flat_rate_cost')) echo $value; ?>" /> <span class="description"><?php _e('Cost excluding tax. Enter an amount, e.g. 2.50.', 'woothemes') ?></span>
		        </td>
		    </tr>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Handling Fee', 'woothemes') ?></th>
		        <td class="forminp">
			        <input type="text" name="woocommerce_flat_rate_handling_fee" id="woocommerce_flat_rate_handling_fee" style="min-width:50px;" value="<?php if ($value = get_option('woocommerce_flat_rate_handling_fee')) echo $value; ?>" /> <span class="description"><?php _e('Fee excluding tax. Enter an amount, e.g. 2.50, or a percentage, e.g. 5%. Leave blank to disable.', 'woothemes') ?></span>
		        </td>
		    </tr>
		    <tr valign="top">
		        <th scope="row" class="titledesc"><?php _e('Method availability', 'woothemes') ?></th>
		        <td class="forminp">
			        <select name="woocommerce_flat_rate_availability" id="woocommerce_flat_rate_availability" style="min-width:100px;">
			            <option value="all" <?php if (get_option('woocommerce_flat_rate_availability') == 'all') echo 'selected="selected"'; ?>><?php _e('All allowed countries', 'woothemes'); ?></option>
			            <option value="specific" <?php if (get_option('woocommerce_flat_rate_availability') == 'specific') echo 'selected="selected"'; ?>><?php _e('Specific Countries', 'woothemes'); ?></option>
			        </select>
		        </td>
		    </tr>
		    <?php
	    	$countries = woocommerce_countries::$countries;
	    	asort($countries);
	    	$selections = get_option('woocommerce_flat_rate_countries', array());
	    	?><tr class="multi_select_countries">
	            <th scope="row" class="titledesc"><?php _e('Specific Countries', 'woothemes'); ?></th>
	            <td class="forminp">
	            	<div class="multi_select_countries"><ul><?php
	        			if ($countries) foreach ($countries as $key=>$val) :
	            			                    			
	        				echo '<li><label><input type="checkbox" name="woocommerce_flat_rate_countries[]" value="'. $key .'" ';
	        				if (in_array($key, $selections)) echo 'checked="checked"';
	        				echo ' />'. __($val, 'woothemes') .'</label></li>';
	
	            		endforeach;
	       			?></ul></div>
	       		</td>
	       	</tr>
       	</table>
       	<script type="text/javascript">
		jQuery(function() {
			jQuery('select#woocommerce_flat_rate_availability').change(function(){
				if (jQuery(this).val()=="specific") {
					jQuery(this).parent().parent().next('tr.multi_select_countries').show();
				} else {
					jQuery(this).parent().parent().next('tr.multi_select_countries').hide();
				}
			}).change();
		});
		</script>
    	<?php
    }
    
    public function process_admin_options() {

   		if(isset($_POST['woocommerce_flat_rate_tax_status'])) update_option('woocommerce_flat_rate_tax_status', woocommerce_clean($_POST['woocommerce_flat_rate_tax_status'])); else delete_option('woocommerce_flat_rate_tax_status');
   		
   		if(isset($_POST['woocommerce_flat_rate_enabled'])) update_option('woocommerce_flat_rate_enabled', 'yes'); else update_option('woocommerce_flat_rate_enabled', 'no');
   		
   		if(isset($_POST['woocommerce_flat_rate_title'])) update_option('woocommerce_flat_rate_title', woocommerce_clean($_POST['woocommerce_flat_rate_title'])); else delete_option('woocommerce_flat_rate_title');
   		if(isset($_POST['woocommerce_flat_rate_type'])) update_option('woocommerce_flat_rate_type', woocommerce_clean($_POST['woocommerce_flat_rate_type'])); else delete_option('woocommerce_flat_rate_type');
   		if(isset($_POST['woocommerce_flat_rate_cost'])) update_option('woocommerce_flat_rate_cost', woocommerce_clean($_POST['woocommerce_flat_rate_cost'])); else delete_option('woocommerce_flat_rate_cost');
   		if(isset($_POST['woocommerce_flat_rate_handling_fee'])) update_option('woocommerce_flat_rate_handling_fee', woocommerce_clean($_POST['woocommerce_flat_rate_handling_fee'])); else delete_option('woocommerce_flat_rate_handling_fee');
   		
   		if(isset($_POST['woocommerce_flat_rate_availability'])) update_option('woocommerce_flat_rate_availability', woocommerce_clean($_POST['woocommerce_flat_rate_availability'])); else delete_option('woocommerce_flat_rate_availability');	    
	    if (isset($_POST['woocommerce_flat_rate_countries'])) $selected_countries = $_POST['woocommerce_flat_rate_countries']; else $selected_countries = array();
	    update_option('woocommerce_flat_rate_countries', $selected_countries);
   		
    }
	
}

function add_flat_rate_method( $methods ) {
	$methods[] = 'flat_rate'; return $methods;
}

add_filter('woocommerce_shipping_methods', 'add_flat_rate_method' );