Long Form Helper - Plugin

long-form-helper.php

<?php
/*
  	Author: Nick Haskins
	Author URI: http://nickhaskins.co
	Plugin Name: Long Form Helper
	Plugin URI: http://nickhaskins.co
	Version: 1.0
	Description: A helper plugin for long posts by introducing a "scroll to" floating panel.
*/

// Check to make sure we're in DMS
add_action('pagelines_setup', 'ba_longform_helper_init' );
function ba_longform_helper_init() {

    if( !function_exists('pl_has_editor') )
        return;

    $landing = new baLongFormHelper;
}
class baLongFormHelper {

	const version = '1.0';

	function __construct() {

		$this->id   = 'ba_longform_helper';
		$this->name = 'Long Form Helper';
   		$this->dir  = plugin_dir_path( __FILE__ );
    	$this->url  = plugins_url( '', __FILE__ );
    	$this->icon = plugins_url( '/icon.png', __FILE__ );

		add_action( 'template_redirect',  array($this,'insert_less' ));
		add_action( 'init', array( $this, 'init' ) );

	}

    // Add a less file
	function insert_less() {

        $file = sprintf( '%sstyle.less', plugin_dir_path( __FILE__ ) );
        if(function_exists('pagelines_insert_core_less')) {
            pagelines_insert_core_less( $file );
        }

    }

	function init(){

		add_action( 'wp_enqueue_scripts', array($this,'scripts' ));
		add_action( 'wp_footer',array($this,'script_init'));

	}

    // Enqueue stuffs
	function scripts(){

		wp_register_script('ba-longform-helper',$this->url.'/jquery.scrollNav.min.js', array('jquery'), self::version, true );

		if(is_single()){
			wp_enqueue_script('ba-longform-helper');
		}
	}

	function script_init(){

		if(is_single()) { ?>
			<!-- Long Form Helper -->
			<script>
				jQuery(window).load(function() {
					jQuery('.entry_content').scrollNav({
					    sections: '.ba-longform',
					    titleText: 'Jump To',
					    fixedMargin: 0,
					    animated: true,
					    speed: 500,
					    showHeadline: true,
					    showTopLink: true,
					    topLinkText: 'Top',
					    location: 'insertBefore'
					});
				});
			</script>
		<?php }
	}
}