<?php
declare(strict_types=1);
namespace Termwind\Html;
use Iterator;
use Symfony\Component\Console\Helper\Table;
use Symfony\Component\Console\Helper\TableCell;
use Symfony\Component\Console\Helper\TableCellStyle;
use Symfony\Component\Console\Helper\TableSeparator;
use Symfony\Component\Console\Output\BufferedOutput;
use Symfony\Component\Console\Output\OutputInterface;
use Termwind\Components\Element;
use Termwind\HtmlRenderer;
use Termwind\Termwind;
use Termwind\ValueObjects\Node;
use Termwind\ValueObjects\Styles;
/**
* @internal
*/
final class TableRenderer
{
/**
* Symfony table object uses for table generation.
*/
private Table $table;
/**
* This object is used for accumulating output data from Symfony table object and return it as a string.
*/
private BufferedOutput $output;
public function __construct()
{
$this->output = new BufferedOutput(
// Content should output as is, without changes
OutputInterface::VERBOSITY_NORMAL | OutputInterface::OUTPUT_RAW,
true
);
$this->table = new Table($this->output);
}
/**
* Converts table output to the content element.
*/
public function toElement(Node $node): Element
{
$this->parseTable($node);
$this->table->render();
$content = preg_replace('/\n$/', '', $this->output->fetch()) ?? '';
return Termwind::div($content, '', [
'isFirstChild' => $node->isFirstChild(),
]);
}
/**
* Looks for thead, tfoot, tbody, tr elements in a given DOM and appends rows from them to the Symfony table object.
*/
private function parseTable(Node $node): void
{
$style = $node->getAttribute('style');
if ($style !== '') {
$this->table->setStyle($style);
}
foreach ($node->getChildNodes() as $child) {
match ($child->getName()) {
'thead' => $this->parseHeader($child),
'tfoot' => $this->parseFoot($child),
'tbody' => $this->parseBody($child),
default => $this->parseRows($child)
};
}
}
/**
* Looks for table header title and tr elements in a given thead DOM node and adds them to the Symfony table object.
*/
private function parseHeader(Node $node): void
{
$title = $node->getAttribute('title');
if ($title !== '') {
$this->table->getStyle()->setHeaderTitleFormat(
$this->parseTitleStyle($node)
);
$this->table->setHeaderTitle($title);
}
foreach ($node->getChildNodes() as $child) {
if ($child->isName('tr')) {
foreach ($this->parseRow($child) as $row) {
if (! is_array($row)) {
continue;
}
$this->table->setHeaders($row);
}
}
}
}
/**
* Looks for table footer and tr elements in a given tfoot DOM node and adds them to the Symfony table object.
*/
private function parseFoot(Node $node): void
{
$title = $node->getAttribute('title');
if ($title !== '') {
$this->table->getStyle()->setFooterTitleFormat(
$this->parseTitleStyle($node)
);
$this->table->setFooterTitle($title);
}
foreach ($node->getChildNodes() as $child) {
if ($child->isName('tr')) {
$rows = iterator_to_array($this->parseRow($child));
if (count($rows) > 0) {
$this->table->addRow(new TableSeparator());
$this->table->addRows($rows);
}
}
}
}
/**
* Looks for tr elements in a given DOM node and adds them to the Symfony table object.
*/
private function parseBody(Node $node): void
{
foreach ($node->getChildNodes() as $child) {
if ($child->isName('tr')) {
$this->parseRows($child);
}
}
}
/**
* Parses table tr elements.
*/
private function parseRows(Node $node): void
{
foreach ($this->parseRow($node) as $row) {
$this->table->addRow($row);
}
}
/**
* Looks for th, td elements in a given DOM node and converts them to a table cells.
*
* @return Iterator<array<int, TableCell>|TableSeparator>
*/
private function parseRow(Node $node): Iterator
{
$row = [];
foreach ($node->getChildNodes() as $child) {
if ($child->isName('th') || $child->isName('td')) {
$align = $child->getAttribute('align');
$class = $child->getClassAttribute();
if ($child->isName('th')) {
$class .= ' strong';
}
$text = (string) (new HtmlRenderer)->parse(
trim(preg_replace('/<br\s?+\/?>/', "\n", $child->getHtml()) ?? '')
);
if ((bool) preg_match(Styles::STYLING_REGEX, $text)) {
$class .= ' font-normal';
}
$row[] = new TableCell(
// I need only spaces after applying margin, padding and width except tags.
// There is no place for tags, they broke cell formatting.
(string) Termwind::span($text, $class),
[
// Gets rowspan and colspan from tr and td tag attributes
'colspan' => max((int) $child->getAttribute('colspan'), 1),
'rowspan' => max((int) $child->getAttribute('rowspan'), 1),
// There are background and foreground and options
'style' => $this->parseCellStyle(
$class,
$align === '' ? TableCellStyle::DEFAULT_ALIGN : $align
),
]
);
}
}
if ($row !== []) {
yield $row;
}
$border = (int) $node->getAttribute('border');
for ($i = $border; $i--; $i > 0) {
yield new TableSeparator();
}
}
/**
* Parses tr, td tag class attribute and passes bg, fg and options to a table cell style.
*/
private function parseCellStyle(string $styles, string $align = TableCellStyle::DEFAULT_ALIGN): TableCellStyle
{
// I use this empty span for getting styles for bg, fg and options
// It will be a good idea to get properties without element object and then pass them to an element object
$element = Termwind::span('%s', $styles);
$styles = [];
$colors = $element->getProperties()['colors'] ?? [];
foreach ($colors as $option => $content) {
if (in_array($option, ['fg', 'bg'], true)) {
$content = is_array($content) ? array_pop($content) : $content;
$styles[] = "$option=$content";
}
}
// If there are no styles we don't need extra tags
if ($styles === []) {
$cellFormat = '%s';
} else {
$cellFormat = '<'.implode(';', $styles).'>%s</>';
}
return new TableCellStyle([
'align' => $align,
'cellFormat' => $cellFormat,
]);
}
/**
* Get styled representation of title.
*/
private function parseTitleStyle(Node $node): string
{
return (string) Termwind::span(' %s ', $node->getClassAttribute());
}
}
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