[CoursePress] - Responses in Certificate

cp-responses-in-certificates.php

<?php
/**
* Plugin Name: [CoursePress] - Responses in Certificate
* Plugin URI: https://premium.wpmudev.org/
* Description: Include Questions and Responses in Certificates
* Author: Panos Lyrakis @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/

add_filter( 'coursepress_basic_certificate_vars', function( $vars ){

	if( 
		//is_admin() ||
		! isset( $_REQUEST['action'] ) || 'certificate' != $_REQUEST['action'] ||
		! isset( $_REQUEST['course_id'] ) || ! isset( $_REQUEST['student_id'] )
	 ){
		return;
	}

	$replacement 	= '';
	$course_id 		= intval( $_REQUEST['course_id'] );
	$student_id 	= intval( $_REQUEST['student_id'] );
	$units 			= CoursePress_Data_Course::get_units_with_modules( $course_id );
	// We will need completion data for input-text and input-textarea responses
	$text_responses = array();
	$completion_data = CoursePress_Data_Student::get_completion_data( $student_id, $course_id );

	//Responses of text or textarea modules
	foreach( $completion_data['units'] as $unit_id => $unit_data ){

		if( isset( $unit_data['responses'] ) && ! empty( $unit_data['responses'] ) ){
			foreach( $unit_data['responses'] as $module_id => $response_data ){
				$text_responses[ $module_id ] = $response_data[0]['response'];
			}
		}

	}
	

	foreach( $units as $unit_id => $unit_data ){
		
		$pages = $unit_data['pages'];

		foreach ( $pages as $page_num => $page_data ) {	
			$modules = 	$page_data['modules'];

			if( ! empty( $modules ) ){
				$replacement .= '<ul>';
				foreach( $modules as $module_id => $module ){
					$response = '';
					$attributes = CoursePress_Data_Module::attributes( $module_id );

					switch ( $attributes['module_type'] ) {
						case 'input-checkbox':
							$answers = $attributes['answers'];
							$answers_selected = $attributes['answers_selected'];

							if( ! empty( $answers_selected ) ){
								foreach( $answers_selected as $selected ){
									if( isset( $answers[$selected] ) ){
										$response .= $answers[$selected];
									}
								}
							}

							if( isset( $answers[$selected] ) ){
								$response = $answers[$selected];
							}
							break;

						case 'input-select':
						case 'input-radio':
							$selected = $attributes['answers_selected'];
							if( isset( $answers[$selected] ) ){
								$response = $answers[$selected];
							}
							break;

						case 'input-text':
						case 'input-textarea':
							$response = isset( $text_responses[ $module_id ] ) ? $text_responses[ $module_id ] : '';
							break;


					}

					$replacement .= "<li>{$module->post_title} <p>{$response}</p></li>";
				}
				$replacement .= '</ul>';

			}	

		}

	}	

	if( '' != $replacement ){
		$vars['STUDENT_REPLIES'] = $replacement;
	}

	return $vars;

}, 10 );