<?
class SV_WC_Donation extends WC_Cart
{

    public function __construct()
    {

        $this->shatner_label = get_option('shatner_label', "Name your own price");

        add_action('wp_enqueue_scripts', function () {
            wp_enqueue_script('shatner', plugins_url('/shatner.js',__FILE__), array('jquery') );
        });

        if ( is_admin() ){ // admin actions
          $this->init_form_fields();
          add_action( 'admin_menu', array($this, 'add_shatner_menu' ));
          add_action( 'admin_init', array($this, 'admin_init' ));
          add_action('woocommerce_before_calculate_totals',  array($this,  'add_custom_price' ));
          add_action('woocommerce_product_options_pricing',  array($this,  'add_donation_radio'));
          add_action('save_post',                            array($this,  'set_named_price'));
        } else {

            if(get_option('use_shatner_templates', 1 ) == 1)
            {
                add_filter('woocommerce_locate_template',       array($this, 'template_override'),10,3);
                add_filter('woocommerce_loop_add_to_cart_link', array($this, 'remove_link'),10);
            }


            add_action('woocommerce_product_options_pricing',  array($this,  'add_donation_radio'));
            add_action('save_post',                            array($this,  'set_named_price'));
            add_action('woocommerce_add_to_cart',              array($this,  'add_to_cart_hook'));
            add_action('woocommerce_before_calculate_totals',  array($this,  'add_custom_price' ));
            add_action('init', array($this, 'init_css'));
        }
    }

    public function remove_link($link)
    {
        global $post;
        $post = get_post_meta($post->ID, '_own_price', true);

        if ($post === 'yes')
            return '';

        return $link;


    }

    public function add_shatner_menu()
    {
        add_options_page(
            'Shatner Plugin Settings', 
            'Shatner Settings', 
            'manage_options', 
            'shatner_plugin', 
            array($this, 'shatner_plugin_settings_page')
        );
    }

    public function shatner_plugin_settings_page()
    {
        include(sprintf("%s/templates/settings.php", dirname(__FILE__))); 
    }


    /**
     * hook into WP's admin_init action hook
     */
    public function admin_init()
    {

        // add your settings section
        add_settings_section(
            'wp_plugin_template-section_shatner', 
            'Shatner Plugin Template Settings', 
            array($this, 'settings_section_shatner_plugin_template'), 
            'wp_plugin_template_shatner'
        );
        
        foreach($this->form_fields as $setting)
        {

            // register your plugin's settings
            register_setting('wp_plugin_template-group-shatner', $setting['title']);
            // add your setting's fields
            add_settings_field(
                $setting['title'], 
                $setting['description'],
                array(&$this, 'settings_field_input_'. $setting['type']), 
                'wp_plugin_template_shatner', 
                'wp_plugin_template-section_shatner',
                array(
                    'field' => $setting['title']
                )
            );
        }
    } // END public static function activate

    public function init_form_fields()
    {
        $this->form_fields = array(
            array(
                'type'        => 'text',
                'title'       => esc_html__('shatner_label', 'woothemes'),
                'description' => esc_html__('Shatner Label', 'woothemes'),
                'default'     => esc_html__('Name your own price', 'woothemes')
            ),
            array(
                'type'        => 'radio_button',
                'title'       => esc_html__('use_shatner_templates', 'woothemes'),
                'description' => esc_html__('Shatner Templates override pricing, disable if you want to customize using your theme', 'woothemes'),
                'default'     => esc_html__('1', 'woothemes')
            )
        );
     }
    
    public function settings_section_shatner_plugin_template()
    {
        // Think of this as help text for the section.
        echo 'These settings set values for Shatner';
    }
    
    /**
     * This function provides text inputs for settings fields
     */
    public function settings_field_input_text($args)
    {
        // Get the field name from the $args array
        $field = $args['field'];
        // Get the value of this setting
        $value = get_option($field);
        // echo a proper input type="text"
        echo sprintf('<input type="text" name="%s" id="%s" value="%s" />', $field, $field, $value);
    } // END public function settings_field_input_text($args)


    /**
     * This function provides text inputs for settings fields
     */
    public function settings_field_input_radio_button($args)
    {

        // Get the field name from the $args array
        $field = $args['field'];
        // Get the value of this setting
        $value = get_option($field);
        
        $html = '<input type="radio" id="'.$field.'_1" name="'.$field.'" value="1"' . checked( 1, $value, false ) . '/> ';
        $html .= ' <label for="'.$field.'_1">Enable</label> <br>';
        
        
        $html .= ' <input type="radio" id="'.$field.'_2" name="'.$field.'" value="2"' . checked( 2, $value, false ) . '/> ';
        $html .= ' <label for="'.$field.'_2">Disable</label>';
        
        echo $html;

    } // END public function settings_field_input_radio($args)





    public function template_override($template, $template_name, $template_path ) {
    // Modification: Get the template from this plugin, if it exists

    $plugin_path = untrailingslashit( plugin_dir_path( __FILE__ ) ). '/templates/';
    
    if ( file_exists( $plugin_path . $template_name ) )
    {
      $template = $plugin_path . $template_name;
      return $template;
    }

    return $template;

    }

    public function init_css()
    {
        wp_register_style('donation_css', plugins_url('custom_styles.css',__FILE__ ), false, '1.0.1', 'all');
        wp_enqueue_style( 'donation_css' );
    }

    public function add_to_cart_hook($key)
    {
        global $woocommerce;
        foreach ($woocommerce->cart->get_cart() as $cart_item_key => $values) 
        {

          
          if(!get_post_meta($values['product_id'], '_own_price', true ) || get_post_meta($values['product_id'], '_own_price', true ) === 'no')
          {
            $values['data']->set_price($_POST['price']);
            continue;
          }


           $thousands_sep  = wp_specialchars_decode( stripslashes( get_option( 'woocommerce_price_thousand_sep' ) ), ENT_QUOTES );
           $decimal_sep = stripslashes( get_option( 'woocommerce_price_decimal_sep' ) );
           $_POST['price'] = str_replace($thousands_sep, '', $_POST['price']);
           $_POST['price'] = str_replace($decimal_sep, '.', $_POST['price']);

           $_POST['price'] = wc_format_decimal($_POST['price']);


            if($cart_item_key == $key)
            {
                $values['data']->set_price($_POST['price']);
                $woocommerce->session->__set($key .'_named_price', $_POST['price']);
            }
        }

    return $key;
    }


    public function set_named_price($post)
    {
        if(isset($_POST['_own_price'])){
            if(!get_post_meta($_POST['post_ID'], '_own_price', true )){
                add_post_meta($_POST['post_ID'], '_own_price', $_POST['_own_price']);
            } else {
                update_post_meta($_POST['post_ID'], '_own_price', $_POST['_own_price']);
            }
        }
        if(isset($_POST['_own_price_enforce_minimum'])){
            if(!get_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', true )){
                add_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', $_POST['_own_price_enforce_minimum']);
            } else {
                update_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', $_POST['_own_price_enforce_minimum']);
            }
        }
    }

    public function add_donation_radio($content)
    {
       global $post;
       woocommerce_wp_radio(array(
           'id' => '_own_price', 
           'class' => 'wc_own_price short', 
           'label' => esc_html__( 'Name your own price', 'woocommerce' ), 
           'options' => array(
                'yes' => 'Yes',
                'no' => 'No',
            )
          )
       );
       woocommerce_wp_radio(array(
           'id' => '_own_price_enforce_minimum', 
           'class' => 'wc_own_price_e short', 
           'label' => esc_html__( 'Enforce "Regular price" as the minimum price', 'woocommerce' ), 
           'options' => array(
                'yes' => 'Yes',
                'no' => 'No',
            )
          )
        );
    }


    public function add_custom_price( $cart_object ) {
        global $woocommerce;
        foreach ( $cart_object->cart_contents as $key => $value ) {

            if(!get_post_meta($value['product_id'], '_own_price', true ) || get_post_meta($value['product_id'], '_own_price', true ) === 'no')
            {
              continue;
            }

            $named_price = $woocommerce->session->__get($key .'_named_price');

            if($named_price)
            {
                $product = $value['data'];
                $product->set_price( $named_price );
            }
        }
    }

}
new SV_WC_Donation();
<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:wfw="http://wellformedweb.org/CommentAPI/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
	xmlns:slash="http://purl.org/rss/1.0/modules/slash/"
	>

<channel>
	<title>Uncategorized &#8211; REACH Foundation</title>
	<atom:link href="https://reachfoundation.life/product-category/uncategorized/feed/" rel="self" type="application/rss+xml" />
	<link>https://reachfoundation.life</link>
	<description>Just another WordPress site</description>
	<lastBuildDate>Mon, 08 Sep 2014 20:40:04 +0000</lastBuildDate>
	<language>en</language>
	<sy:updatePeriod>
	hourly	</sy:updatePeriod>
	<sy:updateFrequency>
	1	</sy:updateFrequency>
	<generator>https://wordpress.org/?v=7.0</generator>
	<item>
		<title>Sample Campaign</title>
		<link>https://reachfoundation.life/product/sample-campaign/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Mon, 08 Sep 2014 20:40:04 +0000</pubDate>
				<guid isPermaLink="false">http://demo.organizedthemes.com/grassroots/?post_type=product&#038;p=63</guid>

					<description><![CDATA[This is what a sample campaign looks like.  You can use this to raise funds toward any goal you have.]]></description>
										<content:encoded><![CDATA[<p>Here is a fundraising campaign in Grassroots.  It&#8217;s made using our Campaign extension for WooCommerce.  You can specify a goal in your currency and the extension will track your progress toward reaching that goal.</p>
<p>Since it&#8217;s built on top of WooCommerce you can actually sell products alongside your fundraising efforts.  That way everything is in one system which makes it easier for you and for your users.</p>
<p>Plus you can make use of the hundreds of extensions for WooCommerce that include everything from payment gateways to features like &#8220;name your own price.&#8221;</p>
]]></content:encoded>
					
		
		
			</item>
		<item>
		<title>Sample Campaign</title>
		<link>https://reachfoundation.life/product/sample-campaign-2/</link>
		
		<dc:creator><![CDATA[admin]]></dc:creator>
		<pubDate>Mon, 08 Sep 2014 20:40:04 +0000</pubDate>
				<guid isPermaLink="false">http://demo.organizedthemes.com/grassroots/?post_type=product&#038;p=63</guid>

					<description><![CDATA[This is what a sample campaign looks like.  You can use this to raise funds toward any goal you have.]]></description>
										<content:encoded><![CDATA[<p>Here is a fundraising campaign in Grassroots.  It&#8217;s made using our Campaign extension for WooCommerce.  You can specify a goal in your currency and the extension will track your progress toward reaching that goal.</p>
<p>Since it&#8217;s built on top of WooCommerce you can actually sell products alongside your fundraising efforts.  That way everything is in one system which makes it easier for you and for your users.</p>
<p>Plus you can make use of the hundreds of extensions for WooCommerce that include everything from payment gateways to features like &#8220;name your own price.&#8221;</p>
]]></content:encoded>
					
		
		
			</item>
	</channel>
</rss>