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Editing: class-lp-question-fill-in-blanks.php

<?php
/**
 * LP_Question_Fill_In_Blanks
 *
 * @author  ThimPress
 * @package LearnPress/Templates
 * @version 4.0.0
 * @extends LP_Question
 */

defined( 'ABSPATH' ) || exit();

if ( ! class_exists( 'LP_Question_Fill_In_Blanks' ) ) {

/**
	 * Class LP_Question_Fill_In_Blanks
	 */
	class LP_Question_Fill_In_Blanks extends LP_Question {
		/**
		 * Type of this question.
		 *
		 * @var string
		 */
		protected $_question_type = 'fill_in_blanks';

/**
		 * @var bool
		 */
		protected $_answer_options = false;

/**
		 * LP_Question_Fill_In_Blanks constructor.
		 *
		 * @param null $the_question
		 * @param null $args
		 *
		 * @throws Exception
		 */
		public function __construct( $the_question = null, $args = null ) {
			parent::__construct( $the_question, $args );

add_filter(
				'learn-press/question-editor/localize-script',
				array( $this, 'sanitize_question_answers' ),
				1000
			);

add_action( 'learn-press/before-clear-question', array( $this, 'clear_question_answer_meta' ) );

add_filter(
				'learn-press/quiz-editor/question-answers-data',
				array( $this, 'admin_editor_question_answers' ),
				10,
				3
			);
			add_filter(
				'learn-press/question-editor/question-answers-data',
				array( $this, 'admin_editor_question_answers' ),
				10,
				3
			);

add_filter( 'learn-press/question/fib/regex-content', array( $this, 'match_shortcode_api' ), 10, 4 );
		}

public function fib_get_ids( $content ) {
			$output = array();

if ( ! empty( $content ) ) {
				preg_match_all(
					'/' . get_shortcode_regex( array( 'fib' ) ) . '/',
					$content,
					$all_shortcode,
					PREG_SET_ORDER
				);

if ( ! empty( $all_shortcode ) ) {
					foreach ( $all_shortcode as $shortcode ) {
						$atts = shortcode_parse_atts( $shortcode[0] );

if ( empty( $atts['id'] ) ) {
							$ida = explode( '=', str_replace( ']', '', $atts[1] ) );
							$ids = isset( $ida[1] ) ? str_replace( '"', '', $ida[1] ) : '';
						} else {
							$ids = $atts['id'];
						}

$output[] = $ids;
					}
				}
			}

return $output;
		}

public function match_shortcode_api( $content, $answer_id, $show_answer = false, $answered = '' ) {
			if ( ! empty( $content ) ) {
				preg_match_all(
					'/' . get_shortcode_regex( array( 'fib' ) ) . '/',
					$content,
					$all_shortcode,
					PREG_SET_ORDER
				);

if ( ! empty( $all_shortcode ) ) {
					foreach ( $all_shortcode as $shortcode ) {
						$atts = shortcode_parse_atts( $shortcode[0] );

$fill = $atts['fill'] ?? '';

$new_str = ' {{FIB_' . esc_attr( $ids ) . '}} ';

$content = str_replace( $shortcode[0], $new_str, $content );
					}
				}
			}

return $content;
		}

public function get_answer_data( $content, $answer_id, $answered = '' ) {
			$output = array();

if ( ! empty( $content ) ) {
				preg_match_all(
					'/' . get_shortcode_regex( array( 'fib' ) ) . '/',
					$content,
					$all_shortcode,
					PREG_SET_ORDER
				);

if ( ! empty( $all_shortcode ) ) {
					foreach ( $all_shortcode as $shortcode ) {
						$atts = shortcode_parse_atts( $shortcode[0] );

$fill = $atts['fill'] ?? '';

if ( is_array( $answered ) ) {
							$answer = $answered[ $ids ] ?? '';
						} else {
							$answer = '';
						}

$is_correct = false;

$blanks = learn_press_get_question_answer_meta( $answer_id, '_blanks', true );

if ( ! empty( $blanks ) ) {
							$is_correct = $this->check_answer( $blanks[ $ids ] ?? [], $answer );
						}

$output[ $ids ]['is_correct'] = $is_correct;
						$output[ $ids ]['answer']     = $answer;
						$output[ $ids ]['correct']    = $fill;
					}
				}
			}

return $output;
		}

public function sanitize_question_answers( $data ) {
			global $post;

if ( $post && ( $post->ID == $this->get_id() ) && isset( $data['root'] ) ) {
				if ( isset( $data['root']['answers'] ) ) {
					$answers     = array();
					$old_answers = reset( $data['root']['answers'] );

foreach ( $old_answers as $k => $v ) {
						if ( $k == '0' ) {
							$answers['title'] = str_replace( array( '=\"', '\"' ), array( '="', '"' ), $v );
						} else {
							$answers[ $k ] = $v;
						}
					}
					$data['root']['answers'] = array( $answers );
				}
			}

return $data;
		}

public function admin_editor_question_answers( $answers, $question_id, $quiz_id ) {
			$question = learn_press_get_question( $question_id );

if ( ! $question ) {
				return $answers;
			}

if ( 'fill_in_blanks' !== $question->get_type() ) {
				return $answers;
			}

if ( $answers ) {
				foreach ( $answers as $k => $answer ) {
					$blanks                  = learn_press_get_question_answer_meta(
						$answer['question_answer_id'],
						'_blanks',
						true
					);
					$answers[ $k ]['blanks'] = ! empty( $blanks ) ? array_values( $blanks ) : array();
				}
			}

return $answers;
		}

/**
		 * Clear answer meta of the question
		 *
		 * @param $question_id
		 *
		 * @since 4.0.0
		 * @version 1.0.1
		 */
		public function clear_question_answer_meta( $question_id ) {
			try {
				$question = LP_Question::get_question( $question_id );
				$answers  = $question->get_answers();

foreach ( $answers as $answer ) {
					$answer_id          = $answer->get_id();
					$lp_db              = LP_Database::getInstance();
					$filter             = new LP_Question_Answermeta_Filter();
					$filter->collection = $lp_db->tb_lp_question_answermeta;
					$filter->where[]    = $lp_db->wpdb->prepare( "AND learnpress_question_answer_id = %s", $answer_id );
					$lp_db->delete_execute( $filter );
				}
			} catch ( Throwable $e ) {
				error_log( __METHOD__ . ': ' . $e->getMessage() );
			}
		}

/**
		 * Get answer options of the question
		 *
		 * @param array $args - Optional.
		 *
		 * @return mixed
		 */
		public function get_answer_options( $args = array() ) {

$args = wp_parse_args(
				$args,
				array(
					'exclude' => '',
					'map'     => '',
					'answer'  => '',
				)
			);

if ( $args['exclude'] && is_string( $args['exclude'] ) ) {
				$exclude = array_map( 'trim', explode( ',', $args['exclude'] ) );
			} else {
				$exclude = $args['exclude'];
			}

$map = $args['map'];

$options = $this->get_data( 'answer_options' );

// Remove key if it present in $exclude.
			if ( $options && ( $exclude || $map ) ) {
				$exclude = array_flip( $exclude );

foreach ( $options as $k => $option ) {
					$is_true             = ! isset( $exclude['is_true'] );
					$fib_answer          = ! empty( $args['answer'] ) ? $args['answer'] : '';
					$title               = $option['title'];
					$option['title']     = apply_filters( 'learn-press/question/fib/regex-content', $title, $option['question_answer_id'], $is_true, $fib_answer );
					$option['ids']       = $this->fib_get_ids( $title );
					$option['title_api'] = wp_strip_all_tags( $this->match_shortcode_api( $title, $option['question_answer_id'], $is_true, $fib_answer ) );
					$option['answers']   = $is_true ? $this->get_answer_data( $title, $option['question_answer_id'], $fib_answer ) : array();

foreach ( $map as $k_map => $v_map ) {
						if ( array_key_exists( $k_map, $option ) ) {
							$option[ $v_map ]  = $option[ $k_map ];
							$exclude[ $k_map ] = 1;
						}
					}

$options[ $k ] = array_diff_key( $option, $exclude );
				}
			}

return apply_filters( 'learn-press/question/answer-options', $options, $this->get_id() );
		}

public function get_editor_settings() {
			$blanks = $this->get_data( 'answer_options' );

global $post;

return array_merge(
				parent::get_editor_settings(),
				array(
					'id'                 => $post->ID,
					'instantParseBlanks' => true,
					'blankOptions'       => $blanks ? array_values( $blanks ) : array(),
					'blankFillsStyle'    => get_post_meta( $post->ID, '_lp_blank_fills_style', true ),
					'blanksStyle'        => get_post_meta( $post->ID, '_lp_blanks_style', true ),
				)
			);
		}

/**
		 * Get input name.
		 *
		 * @param $fill
		 *
		 * @return string
		 */
		public function get_input_name( $fill ) {
			return '_' . md5( wp_create_nonce( $fill ) );
		}

/**
		 * Set text format.
		 *
		 * @param $text
		 *
		 * @return string
		 */
		private function _format_text( $text ) {
			return trim( preg_replace( '!\s+!', ' ', $text ) );
		}

public function get_default_answers() {
			$default = array(
				array(
					'is_true' => 'yes',
					'value'   => '',
					'title'   => '',
				),
			);

return $default;
		}

/**
		 * Check user answer.
		 *
		 * @param null $user_answer
		 *
		 * @return array
		 */
		public function check( $user_answer = null ) {
			$return = parent::check();
			settype( $user_answer, 'array' );
			$answers = $this->get_answers();

if ( $answers ) {
				foreach ( $answers as $key => $option ) {
					$blanks             = $option->get_meta( '_blanks' );
					$return['blanks']   = array();
					$return['answered'] = array();

if ( ! empty( $blanks ) ) {
						$total_field_input    = count( $blanks );
						$total_answer_correct = 0;

foreach ( $user_answer as $answer_id => $answer_value ) {
							$answer_id = trim( $answer_id );

foreach ( $blanks as $blank ) {
								if ( $answer_id === $blank['id'] ) {
									$user_fill     = trim( $answer_value );
									$blank_correct = $this->check_answer( $blank, $answer_value );

$return['blanks'][ $answer_id ]   = $blank_correct;
									$return['answered'][ $answer_id ] = $user_fill;

if ( $blank_correct ) {
										$total_answer_correct++;
									}
								}
							}
						}

if ( $total_answer_correct === $total_field_input ) {
							$return['correct'] = true;
							$return['mark']    = $this->get_mark();
						}
					}
				}
			}

$question = $this;
			$data     = compact( 'user_answer', 'answers', 'question' );

return apply_filters( 'learn-press/question/fill-in-blank/check', $return, $data );
		}

/**
		 * Check answer fill in blank
		 *
		 * @param array $blank
		 * @param $user_fill
		 *
		 * @return bool
		 */
		public function check_answer( array $blank, $user_fill ): bool {
			$fill       = trim( $blank['fill'] ?? '' );
			$comparison = ! empty( $blank['comparison'] ) ? $blank['comparison'] : false;
			$match_case = ! empty( $blank['match_case'] );
			$user_fill  = trim( $user_fill );

$blank_correct = false;

switch ( $comparison ) {
				case 'range':
					if ( is_numeric( $user_fill ) ) {
						$fill      = explode( ',', $fill );
						$words     = array_map( 'trim', $fill );
						$words     = array_map( 'floatval', $fill );
						$user_fill = floatval( $user_fill );

if ( count( $words ) == 2 ) {
							$blank_correct = $words[0] <= $user_fill && $user_fill <= $words[1];
						}
					}
					break;

case 'any':
					$fill  = explode( ',', $fill );
					$words = array_map( 'trim', $fill );

if ( ! $match_case ) {
						$words     = array_map( 'strtolower', $words );
						$user_fill = strtolower( $user_fill );
					}

$blank_correct = in_array( $user_fill, $words );
					break;

default:
					if ( $match_case ) {
						$blank_correct = strcmp( $user_fill, $fill ) == 0;
					} else {
						$blank_correct = strcasecmp( mb_strtolower( $user_fill, 'UTF-8' ), mb_strtolower( $fill, 'UTF-8' ) ) == 0;
					}
			}

$data = compact( 'blank', 'user_fill' );

return apply_filters( 'learn-press/question/fill-in-blank/check_answer', $blank_correct, $data );
		}
	}
}