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Editing: helper.php

<?php

namespace MetForm_Pro\Utils;

defined('ABSPATH') || exit;
/**
 * Global helper class.
 *
 * @since 1.0.0
 */

class Helper
{

/**
	 * Get metform older version if has any.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public static function old_version()
	{
		$version = get_option('metform_version');
		return null == $version ? -1 : $version;
	}

/**
	 * Set metform installed version as current version.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public static function set_version()
	{
	}

/**
	 * Auto generate classname from path.
	 *
	 * @since 1.0.0
	 * @access public
	 */
	public static function make_classname($dirname)
	{
		$dirname = pathinfo($dirname, PATHINFO_FILENAME);
		$class_name	 = explode('-', $dirname);
		$class_name	 = array_map('ucfirst', $class_name);
		$class_name	 = implode('_', $class_name);

return $class_name;
	}

public static function google_fonts($font_families = [])
	{
		$fonts_url         = '';
		if ($font_families) {
			$query_args = array(
				'family' => urlencode(implode('|', $font_families))
			);

$fonts_url = add_query_arg($query_args, 'https://fonts.googleapis.com/css');
		}

return esc_url_raw($fonts_url);
	}

public static function kses($raw)
	{

$allowed_tags = array(
			'a'								 => array(
				'class'	 => array(),
				'href'	 => array(),
				'rel'	 => array(),
				'title'	 => array(),
				'target'	 => array(),
			),
			'abbr'							 => array(
				'title' => array(),
			),
			'b'								 => array(),
			'blockquote'					 => array(
				'cite' => array(),
			),
			'cite'							 => array(
				'title' => array(),
			),
			'code'							 => array(),
			'del'							 => array(
				'datetime'	 => array(),
				'title'		 => array(),
			),
			'dd'							 => array(),
			'div'							 => array(
				'class'	 => array(),
				'title'	 => array(),
				'style'	 => array(),
			),
			'dl'							 => array(),
			'dt'							 => array(),
			'em'							 => array(),
			'h1'							 => array(
				'class' => array(),
			),
			'h2'							 => array(
				'class' => array(),
			),
			'h3'							 => array(
				'class' => array(),
			),
			'h4'							 => array(
				'class' => array(),
			),
			'h5'							 => array(
				'class' => array(),
			),
			'h6'							 => array(
				'class' => array(),
			),
			'i'								 => array(
				'class' => array(),
			),
			'img'							 => array(
				'alt'	 => array(),
				'class'	 => array(),
				'height' => array(),
				'src'	 => array(),
				'width'	 => array(),
			),
			'li'							 => array(
				'class' => array(),
			),
			'ol'							 => array(
				'class' => array(),
			),
			'p'								 => array(
				'class' => array(),
			),
			'q'								 => array(
				'cite'	 => array(),
				'title'	 => array(),
			),
			'span'							 => array(
				'class'	 => array(),
				'title'	 => array(),
				'style'	 => array(),
			),
			'iframe'						 => array(
				'width'			 => array(),
				'height'		 => array(),
				'scrolling'		 => array(),
				'frameborder'	 => array(),
				'allow'			 => array(),
				'src'			 => array(),
			),
			'strike'						 => array(),
			'br'							 => array(),
			'strong'						 => array(),
			'data-wow-duration'				 => array(),
			'data-wow-delay'				 => array(),
			'data-wallpaper-options'		 => array(),
			'data-stellar-background-ratio'	 => array(),
			'ul'							 => array(
				'class' => array(),
			),
		);

if (function_exists('wp_kses')) { // WP is here
			return wp_kses($raw, $allowed_tags);
		} else {
			return $raw;
		}
	}

public static function kspan($text)
	{
		return str_replace(['{', '}'], ['<span>', '</span>'], self::kses($text));
	}

public static function trim_words($text, $num_words)
	{
		return wp_trim_words($text, $num_words, '');
	}

public static function array_push_assoc($array, $key, $value)
	{
		$array[$key] = $value;
		return $array;
	}

public static function render($content)
	{
		if (stripos($content, "metform-has-lisence") !== false) {
			return null;
		}

return $content;
	}
	public static function render_elementor_content($content_id)
	{
		$elementor_instance = \Elementor\Plugin::instance();
		return $elementor_instance->frontend->get_builder_content_for_display($content_id);
	}

public static function img_meta($id)
	{
		$attachment = get_post($id);
		if ($attachment == null || $attachment->post_type != 'attachment') {
			return null;
		}
		return [
			'alt' => get_post_meta($attachment->ID, '_wp_attachment_image_alt', true),
			'caption' => $attachment->post_excerpt,
			'description' => $attachment->post_content,
			'href' => get_permalink($attachment->ID),
			'src' => $attachment->guid,
			'title' => $attachment->post_title
		];
	}

public static function render_inner_content($content, $id)
	{
		return str_replace('.elementor-' . $id . ' ', '#elementor .elementor-' . $id . ' ', $content);
	}

public static function url_generate($url, $params)
	{
		$params_url = http_build_query($params, '', '&');
		if (strpos($url, '?') === false) {
			return ($url . '?' . $params_url);
		} else {
			return ($url . '&' . $params_url);
		}
	}

/**
	 * Check if woocommerce is exists
	 */
	public static function mf_is_woo_exists()
	{
		if (in_array('woocommerce/woocommerce.php', apply_filters('active_plugins', get_option('active_plugins')))) {
			return true;
		}
		return false;
	}
}

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