<?php
namespace BrizyPlaceholdersTests\Sample;

use BrizyPlaceholders\ContentPlaceholder;
use BrizyPlaceholders\ContextInterface;
use BrizyPlaceholders\PlaceholderInterface;

class TestPlaceholder implements PlaceholderInterface
{
    /**
     * Returns true if the placeholder can return a value for the given placeholder name
     *
     * @param $placeholderName
     *
     * @return mixed
     */
    public function support($placeholderName)
    {
        return strpos($placeholderName, 'placeholder') === 0 && $placeholderName!=='placeholder_loop';
    }


    /**
     * Return the string value that will replace the placeholder name in content
     *
     * @param ContextInterface $context
     * @param ContentPlaceholder  $placeholder
     *
     * @return mixed
     */
    public function getValue(ContextInterface $context, ContentPlaceholder $placeholder)
    {
        return 'placeholder_value';
    }

    public function shouldFallbackValue($value, ContextInterface $context, ContentPlaceholder $placeholder)
    {
        return empty($value);
    }

    public function getFallbackValue(ContextInterface $context, ContentPlaceholder $placeholder)
    {
        $attributes = $placeholder->getAttributes();
        return isset($attributes[PlaceholderInterface::FALLBACK_KEY]) ? $attributes[PlaceholderInterface::FALLBACK_KEY] : '';
    }

    /**
     * It should return an unique identifier of the placeholder
     *
     * @return mixed
     */
    public function getUid()
    {
        return md5(serialize($this));
    }
}