<?php
/*
 * citeproc-php
 *
 * @link        http://github.com/seboettg/citeproc-php for the source repository
 * @copyright   Copyright (c) 2017 Sebastian Böttger.
 * @license     https://opensource.org/licenses/MIT
 */

namespace Seboettg\CiteProc\Styles;

use Seboettg\CiteProc\CiteProc;
use Seboettg\CiteProc\Util\StringHelper;
use SimpleXMLElement;

/**
 * Trait QuotesTrait
 *
 * The quotes attribute may set on cs:text. When set to “true” (“false” is default), the rendered text is wrapped in
 * quotes (the quotation marks used are terms). The localized punctuation-in-quote option controls whether an adjoining
 * comma or period appears outside (default) or inside the closing quotation mark.
 *
 * @package Seboettg\CiteProc\Styles
 * @author Sebastian Böttger <seboettg@gmail.com>
 */
trait QuotesTrait
{

    /**
     * @var bool
     */
    private $quotes = false;

    public function initQuotesAttributes(SimpleXMLElement $node)
    {
        if (isset($node['quotes']) && "true" === (string) $node['quotes']) {
            $this->quotes = true;
        }
    }

    /**
     * @param string $text
     * @return string
     */
    public function addSurroundingQuotes($text)
    {
        if ($this->quotes) {
            $openQuote = CiteProc::getContext()->getLocale()->filter("terms", "open-quote")->single;
            $closeQuote = CiteProc::getContext()->getLocale()->filter("terms", "close-quote")->single;
            $punctuationInQuotes = CiteProc::getContext()->getLocale()->filter("options", "punctuation-in-quote");
            $text = $this->replaceOuterQuotes($text, $openQuote, $closeQuote);
            if (null !== $punctuationInQuotes || $punctuationInQuotes === false) {
                if (preg_match("/^(.+)([\.,;]+)$/", $text, $match)) {
                    $punctuation = substr($match[2], -1);
                    if ($this->suffix !== $punctuation) {
                        $text = $match[1] . substr($match[2], 0, strlen($match[2]) - 1);
                        return $openQuote . $text . $closeQuote . $punctuation;
                    }
                }
            }
            return $openQuote . $text . $closeQuote;
        }
        return $text;
    }

    /**
     * @param $text
     * @param $outerOpenQuote
     * @param $outerCloseQuote
     * @return string
     */
    private function replaceOuterQuotes($text, $outerOpenQuote, $outerCloseQuote)
    {
        $innerOpenQuote = CiteProc::getContext()
            ->getLocale()
            ->filter("terms", "open-inner-quote")
            ->single;
        $innerCloseQuote = CiteProc::getContext()
            ->getLocale()
            ->filter("terms", "close-inner-quote")
            ->single;
        $text = StringHelper::replaceOuterQuotes(
            $text,
            "\"",
            "\"",
            $innerOpenQuote,
            $innerCloseQuote
        );
        $text = StringHelper::replaceOuterQuotes(
            $text,
            $outerOpenQuote,
            $outerCloseQuote,
            $innerOpenQuote,
            $innerCloseQuote
        );
        return $text;
    }
}
