<?php
/*
 * 
 */
namespace Chill\MainBundle\Templating;

use Twig\Extension\AbstractExtension;
use Twig\TwigFilter;
use Twig\Environment;

/**
 * 
 */
class ChillTwigHelper extends AbstractExtension
{
    public function getFilters()
    {
        return [
            new TwigFilter('chill_print_or_message', [$this, 'printOrMessage'], [
                'needs_environment' => true,
                'is_safe' => ['html', 'html_attrs']
            ]),
        ];
    }
    
    /**
     * Print `value` inside a template, or, if $value is empty, 
     * print $message.
     * 
     * The template can be customized. The template is a full path to another
     * template, or one of the key belows: 
     * 
     * - 'default' ;
     * - 'blockquote' ;
     * 
     * `DateTimeInterface are also rendered. The date and time format may be set
     * using those key in `$options´ parameter:
     * 
     * - `date_format` (default to `'medium'`)
     * - `time_format` (default to `'none'`)
     * 
     * @param Environment $twig
     * @param string $value Default to 'No value'. Fallback to default if null
     * @param string $message
     * @param string $template
     * @param array $options
     * @return string
     */
    public function printOrMessage(
        Environment $twig,
        $value, 
        $message = 'No value', 
        $template = 'default',
        array $options = []
    ) {
        if ($value instanceof \DateTimeInterface) {
            $options = \array_merge([
                'date_format' => 'medium',
                'time_format' => 'none'
            ], $options);
            switch ($template) {
                case 'default':
                case 'blockquote':
                    $t = '@ChillMain/Extensions/PrintOrMessage/'.$template.'_date.html.twig';
                    break;
                default:
                    $t = $template;
            }
        } else {
            switch ($template) {
                case 'default':
                case 'blockquote':
                    $t = '@ChillMain/Extensions/PrintOrMessage/'.$template.'.html.twig';
                    break;
                default:
                    $t = $template;
            }
        }
        
        return $twig->render($t, \array_merge([
            'value' => $value,
            'message' => $message ?? 'No value'
        ], $options));
    }
}