<?php

/**
 * Документ
 */
namespace ctiso\Excel;
use XMLWriter,
    Exception;

class Document {
    static  $ns = "urn:schemas-microsoft-com:office:spreadsheet";
    private $table = array ();
    protected $styles = array();

    function addTable($table) {
        $this->table [] = $table;
    }

    /**
     * Добавление стиля к документу 
     * @param $name string Имя стиля
     * @param $values array Параметры стиля
     * @param $type Тип стиля
     */
    function setStyle ($name, array $values, $type = 'Interior')
    {
        if(!isset($this->styles[$name])) {
            $this->styles[$name] = [];            
        }        
        $this->styles[$name][$type] = $values;
    }

    /**
     * Генерация стилей     
     */
    private function createStyles (XMLWriter $doc) {
        $doc->startElement('Styles');
        foreach ($this->styles as $name => $sn) {
            $doc->startElement('Style');
            $doc->writeAttribute('ss:ID', $name);
            foreach ($sn as $type => $s) {
                // Стиль Borders - составной
                if ($type == 'Borders') {
                    $doc->startElement('Borders');
                    foreach ($s as $border) {
                        $border/*: array*/ = $border;
                        $doc->startElement('Border');
                        foreach ($border as $key => $value) {
                            $doc->writeAttribute('ss:' . $key, $value);
                        }
                        $doc->endElement();
                    }
                    $doc->endElement();
                } else {
                    $doc->startElement($type);
                    foreach ($s as $key => $value) {
                        $doc->writeAttribute('ss:' . $key, $value);
                    }
                    $doc->endElement();
                }
            }
            $doc->endElement();
        }
        $doc->endElement();
    }

    /**
     * Преобразует переводы строки в спец символы
     */
    function clean ($s) {
        assert(is_string($s));

        return strtr($s, ["\n" => "&#10;"]);
    }
    
    /**    
     * Сохраняет таблицу в формате Office 2003 XML
     * http://en.wikipedia.org/wiki/Microsoft_Office_XML_formats
     */
    function save($filename)
    {
        $doc = new XMLWriter();
        if (!$doc->openURI($filename)) {
            throw new Exception("unknown file " .  $filename);
        }
        $doc->setIndent(false);
        $doc->startDocument('1.0','utf-8');
        $doc->startElement('Workbook');
        $doc->writeAttribute('xmlns', self::$ns);
        $doc->writeAttribute('xmlns:ss', self::$ns);

        $this->createStyles($doc);
        
        foreach ($this->table as $table) {
            if ($table instanceof Table) {
                $table->createTable($doc);
            } else {
                $table_data = call_user_func($table);
                $table_data->createTable($doc);
                unset($table_data);
            }
        }
        $doc->endElement();
    }
}