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<?php
/**
 * Quiz class for PRO user.
 *
 * @package TutorPro\Quiz
 * @author Themeum <support@themeum.com>
 * @link https://themeum.com
 * @since 2.2.0
 */

namespace TUTOR_PRO;

use TUTOR\Input;

/**
 * Class Quiz
 *
 * @since 2.2.0
 */
class Quiz {
	/**
	 * Register hooks
	 *
	 * @since 2.2.0
	 *
	 * @return void
	 */
	public function __construct() {
		add_filter( 'tutor_quiz_question_data', array( $this, 'extend_question_data' ) );
		add_action( 'tutor_quiz_question_form_after_answer_list', array( $this, 'extend_question_form' ) );
		add_action( 'tutor_quiz_attempt_details_loop_after_row', array( $this, 'correct_answer_explanation_content' ), 10, 2 );
		add_action( 'tutor_quiz_question_desc_field', array( $this, 'add_wp_editor_to_quiz_question_desc' ) );
		add_action( 'tutor_quiz_question_desc_render', array( $this, 'render_question_description' ), 10, 2 );
	}

/**
	 * Add WP editor support to quiz question description.
	 *
	 * @since 2.2.3
	 *
	 * @param object $question_obj question object.
	 *
	 * @return void
	 */
	public function add_wp_editor_to_quiz_question_desc( $question_obj ) {
		wp_editor(
			$question_obj->question_description,
			'tutor_quiz_desc_text_editor',
			array( 'editor_height' => 150 )
		);
	}

/**
	 * Render question description data.
	 *
	 * @since 2.2.3
	 *
	 * @param string $description description with HTML markup.
	 * @param object $question question object.
	 *
	 * @return void
	 */
	public function render_question_description( $description, $question ) {
		add_filter( 'wp_kses_allowed_html', Input::class . '::allow_iframe', 10, 2 );
		echo do_shortcode( wp_kses_post( $description ) );
	}

/**
	 * Add data to question during add/edit quiz question.
	 *
	 * @since 2.2.0
	 *
	 * @param array $data question data.
	 *
	 * @return array question data.
	 */
	public function extend_question_data( $data ) {
		$data['answer_explanation'] = '';

$question_id = Input::post( 'tutor_quiz_question_id', 0, Input::TYPE_INT );
		if ( $question_id ) {
			$explanation = Input::post( 'answer_explanation', '', Input::TYPE_KSES_POST );
			if ( '<p><br></p>' === $explanation ) {
				$explanation = '';
			}

$data['answer_explanation'] = $explanation;
		}

/**
		 * WP editor support to Quiz question
		 *
		 * @since 2.2.3
		 */
		$html_mode = Input::post( 'is_html_active', false, Input::TYPE_BOOL );
		if ( $html_mode ) {
			add_filter( 'wp_kses_allowed_html', Input::class . '::allow_iframe', 10, 2 );
			$data['question_description'] = Input::post( 'tutor_quiz_desc_text_editor', '', Input::TYPE_KSES_POST );
		}

return $data;
	}

/**
	 * Extend quiz question form.
	 *
	 * @since 2.2.0
	 *
	 * @param object $question question object.
	 *
	 * @return void
	 */
	public function extend_question_form( $question ) {
		?>
			<div class="tutor-mt-16 tutor-mb-16">
				<label class="tutor-form-label">
					<?php esc_html_e( 'Answer Explanation', 'tutor-pro' ); ?>
				</label>

<textarea name="answer_explanation" 
					id="tutor_answer_explanation" class="tutor-form-control">
					<?php echo wp_kses_post( wp_unslash( $question->answer_explanation ?? '' ) ); ?>
				</textarea>

</div>
		<?php
	}

/**
	 * Correct answer explanation content.
	 *
	 * @since 2.2.0
	 *
	 * @param object $answer answer object.
	 * @param string $answer_status answer status.
	 *
	 * @return void
	 */
	public function correct_answer_explanation_content( $answer, $answer_status ) {
		if ( strlen( trim( wp_strip_all_tags( $answer->answer_explanation ) ) ) > 0 && 'pending' !== $answer_status ) :
			?>
			<tr>
				<td colspan="100%" class="column-empty-state data-td-content" id="tutor-question-<?php echo esc_attr( $answer->question_id ); ?>" style="display:none;">
					<div class="quiz-explanation-wrapper">
						<div class="tutor-mr-16">
							<span class="tutor-icon-circle-mark-line tutor-color-success tutor-fs-5"></span>
						</div>
						<div>
							<p class="tutor-fw-medium tutor-mb-8 tutor-fw-bold"><?php esc_html_e( 'Explanation:', 'tutor-pro' ); ?></p>
							<?php echo wp_kses_post( wp_unslash( $answer->answer_explanation ) ); ?>
						</div>
					</div>
				</td>
			</tr>

<tr>
				<td colspan="100%" class="expand-btn explain-toggle" data-th="Collapse">
					<button class="tutor-iconic-btn tutor-icon-angle-down has-data-td-target" 
							data-td-target="tutor-question-<?php echo esc_attr( $answer->question_id ); ?>">
					</button>
				</td>
			</tr>
			
			<?php
		endif;
	}
}