<?php

/**
 * Styles enqueue class.
 *
 * @since 3.1.1
 */
class Styles {

    var $styles = array();

    private static $instance;

    public static function newInstance()
    {
        if(!self::$instance instanceof self) {
            self::$instance = new self;
        }
        return self::$instance;
    }

    public function __construct()
    {
        $styles = array();
    }

    /**
     * Add style to be loaded
     *
     * @param type $id
     * @param type $url
     * @param bool $force
     */
    public function addStyle($id, $url, $force = false)
    {
        $this->styles[$id] = array(
            'url'   => $url,
            'force' => (int)$force
        );
    }

    /**
     * Remove style to not be loaded
     *
     * @param type $id
     */
    public function removeStyle($id)
    {
        unset($this->styles[$id]);
    }

    /**
     * Get the css styles urls
     */
    public function getStyles()
    {
        return $this->styles;
    }

    /**
     * Print the HTML tag to load the necessary style
     */
    public function printStyle($id)
    {
        echo '<link href="' . osc_apply_filter('style_url', $this->styles[$id]['url']) . '" rel="stylesheet" type="text/css" />' . PHP_EOL;
    }

    /**
     * Print the HTML tags to load the styles
     */
    public function printStyles()
    {
        foreach($this->styles as $css) {
            if(OC_ADMIN) {
                echo '<link href="' . osc_apply_filter('style_url', $css['url']) . '" rel="stylesheet" type="text/css" />' . PHP_EOL;
            } else {
                if($css['force']) {
                    echo '<link media="all" href="' . osc_apply_filter('style_url', $css['url']) . '" rel="stylesheet" type="text/css" />' . PHP_EOL;
                } else {
                    echo '<link media="none" onload="this.media=\'all\'" href="' . osc_apply_filter('style_url', $css['url']) . '" rel="stylesheet" type="text/css" />' . PHP_EOL;
                }
            }
        }
    }
}