<?php
/*
* @package		Tech Fry Library
* @license		https://www.gnu.org/licenses/gpl-3.0.en.html
*/

namespace TechFry\Library\View\Others;

defined('_JEXEC') or die;

// Reference: https://quickchart.io/documentation/graphviz-api/
class Graphviz
{
    public $format; // Output format

    public $type; // graph, digraph

    public $statements;

    public function __construct()
    {
        $this->type = 'digraph';

    }
    
    public function display()
    {
        $content = '';

        foreach ($this->statements as $statement)
        {
            $content .= $statement . ';';
        }
        
        $url = 'https://quickchart.io/graphviz?graph=' . $this->type . '{' . $content . '}';
        
        $output = '<img src="' . $url . '">';
        
        return $output;
    }

    public function add_statement($statement)
    {
        $this->statements[] = $statement;
    }

    public static function get_output($content, $config = array())
    {
        // content
        
        if (empty($content))
        {
            return;
        }
        
        $url = 'https://quickchart.io/graphviz?graph=digraph{' . $content . '}';
        
        $output = '<img src="' . $url . '">';
        
        return $output;
    }
}