ap_user_can_answer( mixed $question_id, boolean|integer $user_id = false )

function ap_user_can_answer( $question_id, $user_id = false ) {
	if ( false === $user_id ) {
		$user_id = get_current_user_id();
	}

	$question = ap_get_post( $question_id );

	// Return false if not a question.
	if ( ! $question || 'question' !== $question->post_type ) {
		return false;
	}

	if ( is_super_admin( $user_id ) ) {
		return true;
	}

	/**
	 * Allow overriding of ap_user_can_answer.
	 *
	 * @param boolean|string $filter        Apply this filter, default is empty string.
	 * @param integer          $question_id     Question ID.
	 * @param integer          $user_id         User ID.
	 * @since 2.4.6          Added 2 new arguments `$question_id` and `$user_id`.
	 */
	$filter = apply_filters( 'ap_user_can_answer', '', $question->ID, $user_id );

	if ( true === $filter ) {
		return true;
	} elseif ( false === $filter ) {
		return false;
	}

	// Return if user cannot read question.
	if ( ! ap_user_can_read_question( $question_id, $user_id ) ) {
		return false;
	}

	// Do not allow to answer if best answer is selected.
	if ( ap_opt( 'close_selected' ) && ap_have_answer_selected( $question->ID ) ) {
		return false;
	}

	// Bail out if question is closed.
	if ( is_post_closed( $question ) ) {
		return false;
	}

	// Check if user is original poster and dont allow them to answer their own question.
	if ( is_user_logged_in() && ap_opt( 'disallow_op_to_answer' ) && ! empty( $question->post_author ) && $question->post_author == $user_id ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual
		return false;
	}

	// Check if user already answered and if multiple answer disabled then don't allow them to answer.
	if ( is_user_logged_in() && ! ap_opt( 'multiple_answers' ) && ap_is_user_answered( $question->ID, $user_id ) ) {
		return false;
	}

	$option = ap_opt( 'post_answer_per' );
	if ( 'have_cap' === $option && is_user_logged_in() && user_can( $user_id, 'ap_new_answer' ) ) {
		return true;
	} elseif ( 'logged_in' === $option && is_user_logged_in() ) {
		return true;
	} elseif ( 'anyone' === $option ) {
		return true;
	}

	return false;
}