<?php

/**
 * The public-facing functionality of the plugin.
 *
 * @link       http://oliverbelmont.com
 * @since      1.0.0
 *
 * @package    Acf_widont
 * @subpackage Acf_widont/public
 */

/**
 * The public-facing functionality of the plugin.
 *
 * Defines the plugin name, version, and two examples hooks for how to
 * enqueue the public-facing stylesheet and JavaScript.
 *
 * @package    Acf_widont
 * @subpackage Acf_widont/public
 * @author     Oliver <obelmont@oliverbelmont.com>
 */
class Acf_widont_Public {

	/**
	 * The ID of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $plugin_name    The ID of this plugin.
	 */
	private $plugin_name;

	/**
	 * The version of this plugin.
	 *
	 * @since    1.0.0
	 * @access   private
	 * @var      string    $version    The current version of this plugin.
	 */
	private $version;

	/**
	 * Initialize the class and set its properties.
	 *
	 * @since    1.0.0
	 * @param      string    $plugin_name       The name of the plugin.
	 * @param      string    $version    The version of this plugin.
	 */
	public function __construct( $plugin_name, $version ) {

		$this->plugin_name = $plugin_name;
		$this->version = $version;
		$this->acf_widont_options = get_option($this->plugin_name);

	}

	/**
	 * Register the stylesheets for the public-facing side of the site.
	 *
	 * @since    1.0.0
	 */
	public function enqueue_styles() {

		/**
		 * This function is provided for demonstration purposes only.
		 *
		 * An instance of this class should be passed to the run() function
		 * defined in Acf_widont_Loader as all of the hooks are defined
		 * in that particular class.
		 *
		 * The Acf_widont_Loader will then create the relationship
		 * between the defined hooks and the functions defined in this
		 * class.
		 */

		wp_enqueue_style( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'css/acf_widont-public.css', array(), $this->version, 'all' );

	}

	/**
	 * Register the JavaScript for the public-facing side of the site.
	 *
	 * @since    1.0.0
	 */
	public function enqueue_scripts() {

		/**
		 * This function is provided for demonstration purposes only.
		 *
		 * An instance of this class should be passed to the run() function
		 * defined in Acf_widont_Loader as all of the hooks are defined
		 * in that particular class.
		 *
		 * The Acf_widont_Loader will then create the relationship
		 * between the defined hooks and the functions defined in this
		 * class.
		 */

		wp_enqueue_script( $this->plugin_name, plugin_dir_url( __FILE__ ) . 'js/acf_widont-public.js', array( 'jquery' ), $this->version, false );

	}

	/**
	 * Determine ACF textbox filter.
	 *
	 * @since    1.0.0
	 */
    public function acf_widont_textfield() {
        if(empty($this->acf_widont_options['textfield'])){
        	remove_filter('acf/format_value/type=text', array($this, 'acf_widont_load'));
        }
    }

	/**
	 * Determine ACF textarea filter.
	 *
	 * @since    1.0.0
	 */
    public function acf_widont_textarea() {
        if(empty($this->acf_widont_options['textarea'])){
        	remove_filter('acf/format_value/type=textarea', array($this, 'acf_widont_load'));
        }
    }

	/**
	 * Determine ACF wysiwyg filter.
	 *
	 * @since    1.0.0
	 */
    public function acf_widont_wysiwyg() {
        if(empty($this->acf_widont_options['wysisyg'])){
			remove_filter('acf_the_content', array($this, 'filter_acf_the_content'));
        }
    }

	/**
	 * ACF value loader.
	 *
	 * @since    1.0.0
	 */
	public function acf_widont_load( $value, $post_id, $field ){
		// run widont on value
		switch ($field['type']) {
			case 'textarea' || 'text':
					$value = $this->acf_widont_simple($value);
				break;
			case 'wysiwyg':
					$value = $this->acf_widont_complex($value);
				break;
			default:
				//If default just use simple
				$this->acf_widont_simple($value);
				break;
		}
		return $value;
	}


	public function filter_acf_the_content( $value ) { 
	    $value = $this->acf_widont_complex($value);
	    return $value; 
	}


	/**
	 * Simple widont function.
	 *
	 * @since    1.0.0
	 */
    public function acf_widont_simple($str = '') {
		$str = rtrim($str);
		$space = strrpos($str, ' ');
		if ($space !== false){
			$str = substr($str, 0, $space).'&nbsp;'.substr($str, $space + 1);
		}
		return $str;
    }

	/**
	 * Complex widont function.
	 *
	 * @since    1.0.0
	 */
    private function acf_widont_complex($value) {

			//Ignore warning
			libxml_use_internal_errors(true);
			$field = new DOMDocument();
			$field->loadHTML(mb_convert_encoding($value, 'HTML-ENTITIES', 'UTF-8'));
			$field = $this->nodeReplace($field);
            $value = $field->saveHTML();

    	return $value;
    }

	/**
	 * Node replacement function for each TEXT_NODE.
	 *
	 * @since    1.0.0
	 */
    public function nodeReplace(DOMnode $field){

    	$newfield = $field;
    	$nbsp = "\xc2\xa0"; //non-breaking space character instead of utf-8 code.

    	foreach ($field->childNodes as $node)
    	{
			if($node->hasChildNodes()) {
				$this->nodeReplace($node);
			}
			else{
				if ($node->nodeType == 3) { // nodeType:3 TEXT_NODE

					$str = rtrim($node->nodeValue);
					$space = strrpos($str, ' ');
					if ($space !== false){
						$str = substr($str, 0, $space).$nbsp.substr($str, $space + 1);
					}
					$node->nodeValue = $str;

					//regex option
					//$node->nodeValue = preg_replace( '|([^\s])\s+([^\s]+)\s*$|', '$1'.$nbsp.'$2', $node->nodeValue);
				}
	        }
	    }
	    return $newfield;
    }

}