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<?php
/**
* Gravity Wiz // Gravity Forms // Edit Products on Entry Detail
*
* Gravity Forms does not let you edit products on the entry detail page. This plugin let's you edit products.
*
* @version	 1.0
* @author    David Smith <david@gravitywiz.com>
* @license   GPL-2.0+
* @link      http://gravitywiz.com/...
* @copyright 2014 Gravity Wiz
*/
class GW_Edit_Products {

    private static $instance = null;

    public static function get_instance( $args = array() ) {
        if( null == self::$instance )
            self::$instance = new self( $args );
        return self::$instance;
    }

    private function __construct( $args ) {

        // make sure we're running the required minimum version of Gravity Forms
        if( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) )
            return;

        // set our default arguments, parse against the provided arguments, and store for use throughout the class
        $this->_args = wp_parse_args( $args, array(
            'form_id'  => false,
            'field_id' => false
        ) );

        // time for hooks
        add_filter( 'gform_field_input', array( $this, 'display_product_edit_mode' ), 10, 5 );
        add_filter( 'gform_after_update_entry', array( $this, 'save_product_edits' ), 10, 2 );

    }

    public function display_product_edit_mode( $input, $field, $value, $entry_id, $form_id ) {

        if( ! $this->is_entry_detail() || ! GFCommon::is_product_field( $field['type'] ) )
            return $input;

        $field['type'] = 'Hijacked by GW_Edit_Products!';
        $input = $this->get_field_input( $field, $value, $entry_id, $form_id );

        return $input;
    }

    public function get_field_input( $field, $value, $entry_id, $form_id ) {

        remove_filter( 'gform_field_input', array( $this, 'display_product_edit_mode' ) );

        $input = GFCommon::get_field_input( $field, $value, $entry_id, $form_id );

        add_filter( 'gform_field_input', array( $this, 'display_product_edit_mode' ), 10, 5 );

        return $input;
    }

    public function save_product_edits( $form, $entry_id ) {

        if( ! $this->is_entry_detail() )
            return;

        $has_product_field = false;

        foreach( $form['fields'] as &$field ) {
            if( GFCommon::is_product_field( $field['type'] ) ) {
                $has_product_field = true;
                $field['type'] = 'Hijacked by GW_Edit_Products!';
            }
        }

        if( $has_product_field )
            GFFormsModel::save_lead( $form, GFAPI::get_entry( $entry_id ) );

        $this->clear_product_cache( $entry_id );

    }

    public function clear_product_cache( $entry_id ) {

        gform_delete_meta( $entry_id, 'gform_product_info_1_1' );
        gform_delete_meta( $entry_id, 'gform_product_info__1' );
        gform_delete_meta( $entry_id, 'gform_product_info_1_' );
        gform_delete_meta( $entry_id, 'gform_product_info__' );

    }

    public function is_entry_detail() {
        return in_array( GFForms::get_page(), array( 'entry_detail', 'entry_detail_edit' ) );
    }

}

function gw_edit_products( $args = array() ) {
    return GW_Edit_Products::get_instance( $args );
}

# Configuration

gw_edit_products();