Libsyn Publisher Hub Shortcode

function libsyn_unqprfx_embed_shortcode( $atts, $content = null ) {
		$defaults = libsyn_unqprfx_shortcode_defaults();

		foreach ( $defaults as $default => $value ) { // add defaults
			if ( ! @array_key_exists( $default, $atts ) ) { // hide warning with "@" when no params at all
				$atts[$default] = $value;
			}
		}

		$src_cut = substr( $atts["src"], 0, 35 ); // special case for google maps
		if( strpos( $src_cut, 'maps.google' ) ){
			$atts["src"] .= '&output=embed';
		}

		//handle myLibsyn widget disable player login
		if ( !empty( get_option('libsyn-podcasting-settings_enable_mylibsyn_widget', false) ) )  {
			$atts['disable_login'] = 'true';
			// $atts['src'] = rtrim($atts['src'], '/') . '/disable_login/true';
		}

		// get_params_from_url
		if ( isset( $atts["get_params_from_url"] ) && ( $atts["get_params_from_url"] == '1' || $atts["get_params_from_url"] == 1 || $atts["get_params_from_url"] == 'true' ) ) {
			if ( $_GET != NULL ) {
				if ( strpos( $atts["src"], '?' ) ) { // if we already have '?' and GET params
					$encode_string = '&';
				} else {
					$encode_string = '?';
				}
				foreach( $_GET as $key => $value ){
					$encode_string .= $key.'='.$value.'&';
				}
			}
			$atts["src"] .= $encode_string;
		}

		$html = '';
		if ( isset( $atts["same_height_as"] ) ) {
			$same_height_as = $atts["same_height_as"];
		} else {
			$same_height_as = '';
		}

		if ( $same_height_as != '' ) {
			$atts["same_height_as"] = '';
			if ( $same_height_as != 'content' ) { // we are setting the height of the iframe like as target element
				if ( $same_height_as == 'document' || $same_height_as == 'window' ) { // remove quotes for window or document selectors
					$target_selector = $same_height_as;
				} else {
					$target_selector = '"' . $same_height_as . '"';
				}
				/* @deprecated 1.3.1
				$html .= '
					<script>
					jQuery(function($){
						var target_height = $(' . $target_selector . ').height();
						$("iframe.' . $atts["class"] . '").height(target_height);
					});
					</script>';
				*/
				$html .= '
					<script>
					var ready = (callback) => {
					  if (document.readyState != "loading") callback();
					  else document.addEventListener("DOMContentLoaded", callback);
					}

					ready(() => {
						var libsyn_iframe_height = ' . $target_selector . '.querySelector("iframe.' . $atts["class"] . '").parentElement.getBoundingClientRect().height;
						' . $target_selector . '.querySelector("iframe.' . $atts["class"] . '").style.height = libsyn_iframe_height;
					});
					</script>';
			} else { // set the actual height of the iframe (show all content of the iframe without scroll)
				/* @deprecated 1.3.1
				$html .= '
					<script>
					jQuery(function($){
						$("iframe.' . $atts["class"] . '").bind("load", function() {
							var embed_height = $(this).contents().find("body").height();
							$(this).height(embed_height);
						});
					});
					</script>';
				*/
				$html .= '
					<script>
					var ready = (callback) => {
					  if (document.readyState != "loading") callback();
					  else document.addEventListener("DOMContentLoaded", callback);
					}

					ready(() => {
						var libsyn_iframe_element = document.querySelector("iframe.' . $atts["class"] . '");
						if ( libsyn_iframe_element.addEventListener ) {
							libsyn_iframe_element.addEventListener("load", function() {
								//var embed_height = libsyn_iframe_element.querySelector("body").getBoundingClientRect().height;
								var embed_height_defined = '.$atts['height'].';
								libsyn_iframe_element.style.height = embed_height_defined;
							}, false);
						}
					});
					</script>';
			}
		}
		$html .= '<iframe style="display:block;" ';
		foreach( $atts as $attr => $value ) {
			if ( $attr != 'same_height_as' ) { // remove some attributes
				if ( $value != '' ) { // adding all attributes
					$html .= ' ' . $attr . '="' . $value . '"';
				} else { // adding empty attributes
					$html .= '';
				}
			}
		}
		$html .= '></iframe>';

		//do player download link
		// @since 1.2.1
		if ( $atts['use_download_link'] && ( $atts['use_download_link'] == "true" || $atts['use_download_link'] == 1 || $atts['use_download_link'] === true || $atts['use_download_link'] == 'use_download_link' ) ) {
			if ( !empty($atts['primary_content_url']) ) {
				$download_url = $atts['primary_content_url'];
			} else {
				$download_url = $atts['src'];
			}
			if ( !empty($atts['download_link_text']) ) {
				$download_link_text = $atts['download_link_text'];
			} else {
				$download_link_text = 'Click here to download the Episode!';
			}

			$player_download_link = '<br /><a class="libsyn-download-link" href ="' . $download_url . '" target="_blank">' . $download_link_text . '</a><br />';
		} else {
			$player_download_link = '';
		}

		//handle player placement
		if ( $atts['placement'] == "top" ) {
			$html = $html.$player_download_link."<br />";
		} else {
			$html = "<br />".$html.$player_download_link;
		}

		return $html;
	}