simplexml-table-iteration.php

<?php
/**
 * PHP XML to dynamic table
 *
 * @link http://stackoverflow.com/q/16997835/367456
 */

require('.../Iterator-Garden/src/autoload.php'); // for DecoratingIterator - use development branch


class TableAggregator implements IteratorAggregate
{
    private $xml;

    public function __construct(SimpleXMLElement $xml) {
        $this->xml = $xml;
    }

    public function getIterator() {

        $formatNumber = function ($number) {
            if ($number === '0') {
                $number = '';
            }

            return sprintf("%' 2s", $number);
        };

        $numbersToArray = function (SimpleXMLElement $stringNumbers) use ($formatNumber) {
            return array_map($formatNumber, explode('-', $stringNumbers));
        };

        $tableToRows = function (SimpleXMLElement $table) use ($numbersToArray) {
            return new DecoratingIterator($table->children(), $numbersToArray);
        };

        $tables = new DecoratingIterator(
            $this->xml->message->ticketpage->ticket,
            $tableToRows
        );

        return $tables;
    }
}

$xml = simplexml_load_file('example.xml');

$tables = new TableAggregator($xml);

foreach ($tables as $table) {
    echo new TextTable($table), "\n";
}

class TextTable
{
    private $data;

    public function __construct($data) {
        $this->data = $data;
    }

    public function __toString() {
        $sizes = array();
        $data  = $this->data;
        foreach ($data as $row => $cols) {
            foreach ($cols as $index => $value) {
                $sizes[$index][$row] = strlen($value);
            }
        }
        $max = array_map('max', $sizes);

        $buffer = $this->lineLine($max) . "\n";
        foreach ($data as $row) {
            $buffer .= $this->lineData($max, $row) . "\n";
            $buffer .= $this->lineLine($max) . "\n";
        }
        return $buffer;
    }

    private function lineLine($sizes) {
        $buffer = "+";
        foreach ($sizes as $size) {
            $buffer .= str_repeat('-', $size) . "+";
        }
        return $buffer;
    }

    private function lineData($sizes, $data) {
        $buffer = "|";
        foreach ($sizes as $i => $size) {
            $buffer .= str_pad($data[$i], $size) . "|";
        }
        return $buffer;
    }
}

class HtmlTable
{
    public function __construct(Traversable $table) {
        $this->table = $table;
    }

    function __toString() {
        $buffer = "<table>\n";
        foreach (new HtmlTableIterator($this->table) as $row) {
            $buffer .= "  $row\n";
        }
        $buffer .= "</table>\n";

        return $buffer;
    }
}

/**
 * Class HtmlTableIterator
 *
 * @see  PHP simpleXML how to check if a nested child exists
 * @link http://stackoverflow.com/a/16826566/367456
 */
class HtmlTableIterator extends IteratorIterator
{
    public function __construct(Traversable $iterator, array $header = NULL) {
        $append = new AppendIterator();
        $header && $append->append(new ArrayIterator(array($header)));
        $append->append(new IteratorIterator($iterator));
        parent::__construct($append);
    }

    public function current() {
        $row = '<tr>';
        foreach (parent::current() as $cell) {
            $row .= "<td>$cell</td>";
        }
        $row .= "</tr>";
        return $row;
    }
}