<?php

/**
 * Easier and cleaner way to create menu list items
 */
class Navigation
{
    private $_lines;

    public function __construct()
    {
        $this->_lines = [];
    }

    /**
     * Adds data to the $_lines array. ( Adds a new line to the menu )
     * If you want your home-button to go the the SITE_ROOT, enter "_root" as linkName
     * You can set $siteRoot to FALSE if you want to link to a different website.
     *
     * @param string $label
     * @param string $linkName
     * @param bool $siteRoot
     * @return null
     */
    public function addLine($label, $linkName = null, $siteRoot = true)
    {
        if (! empty($label)) {
            if (empty($linkName)) {
                $Functions = new Functions();
                $linkName = $Functions->encodeUrl($label);
            }
            if ($siteRoot) {
                $url = LANG_ROOT.$linkName.'/';
            } else {
                $url = $linkName;
            }

            if ($linkName == '_root') {
                $url = LANG_ROOT;
            }

            $this->_lines[] = ['url'=>$url, 'label'=>$label, '$linkName'=>$linkName];
        }
    }

    /**
     * Creates an array of listItems
     * @param bool $echo
     * @internal param $boolean
     * @return mixed
     */
    public function display($echo = true)
    {
        $output = '';
        foreach ($this->_lines as $key => $line) {
            $output .= '<li';
            // Active ?
            $classes = [];
            if ((defined('URL_PAGE') && URL_PAGE == $line['$linkName']) || (! defined('URL_PAGE') && $line['$linkName'] == '_root')) {
                $classes[] = 'active';
            }
            // First?
            if ($key == 0) {
                $classes[] = 'first';
            }
            // Last ?
            if ($key == count($this->_lines) - 1) {
                $classes[] = 'last';
            }

            if (count($classes) > 0) {
                $output .= ' class="';
                foreach ($classes as $n => $class) {
                    if ($n != 0) {
                        $output .= ' ';
                    }
                    $output .= $class;
                }
                $output .= '"';
            }
            $output .= '>';
            $output .= '<a href="'.$line['url'].'" title="'.$line['label'].'">'.$line['label'].'</a>';
            $output .= '</li>';
        }

        if ($echo) {
            echo $output;

            return true;
        }

        return $output;
    }
}