build.php

<?php
/*
	BUILD SCRIPT

	Takes the all the icons from the heroicons/optimized directory,
	modifies them to add the check for attributes and saves them as PHP files
*/

@mkdir(__DIR__ . '/snippets/solid', recursive: true);
@mkdir(__DIR__ . '/snippets/outline', recursive: true);
@mkdir(__DIR__ . '/snippets/mini', recursive: true);
@mkdir(__DIR__ . '/snippets/micro', recursive: true);
@mkdir(__DIR__ . '/assets', recursive: true);

$spritesheet = '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">';

/**
 * Generate snippets
 */
foreach (new DirectoryIterator(__DIR__ . '/heroicons/optimized/16/solid') as $file) {
	if ($file->getType() !== 'file') {
		continue;
	}

	$original = file_get_contents($file->getPathname());

	$icon = str_replace('<svg', '<svg class="<?= $class ?? \'\' ?>"', $original);
	$icon = str_replace('aria-hidden="true" data-slot="icon"', '<?= $attributes ?? \'aria-hidden="true"\' ?>', $icon);
	$name = __DIR__ . '/snippets/micro/' . str_replace('svg', 'php', $file->getFilename());
	file_put_contents($name, $icon);

	// Also generate sprite sheet from micro icons
	$id = str_replace('.svg', '', $file->getFilename());
	$symbol = preg_replace('/<svg[^>]*>/', "<symbol id=\"$id\" viewBox=\"0 0 16 16\" fill=\"none\">", $original);
	$symbol = str_replace('</svg>', '</symbol>', $symbol);
	$symbol = str_replace('<path', '<path fill="currentColor"', $symbol);
	$spritesheet .= $symbol;
}
$spritesheet .= '</svg>';

foreach (new DirectoryIterator(__DIR__ . '/heroicons/optimized/20/solid') as $file) {
	if ($file->getType() !== 'file') {
		continue;
	}

	$icon = file_get_contents($file->getPathname());
	$icon = str_replace('<svg', '<svg class="<?= $class ?? \'\' ?>"', $icon);
	$icon = str_replace('aria-hidden="true" data-slot="icon"', '<?= $attributes ?? \'aria-hidden="true"\' ?>', $icon);
	$name = __DIR__ . '/snippets/mini/' . str_replace('svg', 'php', $file->getFilename());
	file_put_contents($name, $icon);
}
foreach (new DirectoryIterator(__DIR__ . '/heroicons/optimized/24/solid') as $file) {
	if ($file->getType() !== 'file') {
		continue;
	}

	$icon = file_get_contents($file->getPathname());
	$icon = str_replace('<svg', '<svg class="<?= $class ?? \'\' ?>"', $icon);
	$name = __DIR__ . '/snippets/solid/' . str_replace('svg', 'php', $file->getFilename());
	$icon = str_replace('aria-hidden="true" data-slot="icon"', '<?= $attributes ?? \'aria-hidden="true"\' ?>', $icon);
	file_put_contents($name, $icon);
}
foreach (new DirectoryIterator(__DIR__ . '/heroicons/optimized/24/outline') as $file) {
	if ($file->getType() !== 'file') {
		continue;
	}

	$icon = file_get_contents($file->getPathname());
	$icon = str_replace('<svg', '<svg class="<?= $class ?? \'\' ?>"', $icon);
	$icon = str_replace('stroke-width="1.5"', 'stroke-width="<?= $strokeWidth ?? 1.5 ?>"', $icon);
	$icon = str_replace('aria-hidden="true" data-slot="icon"', '<?= $attributes ?? \'aria-hidden="true"\' ?>', $icon);
	$name = __DIR__ . '/snippets/outline/' . str_replace('svg', 'php', $file->getFilename());
	file_put_contents($name, $icon);
}

/**
 * Generate plugin index.php
 */
$snippets = [];
foreach(new DirectoryIterator(__DIR__ . '/snippets/micro') as $file) {
	if ($file->getType() !== 'file') { continue; }

	$baseName = $file->getBasename('.php');
	$snippetName = "heroicons/micro/$baseName";
	$loadPath = "/snippets/micro/{$baseName}.php";
	$snippets []= compact('snippetName', 'loadPath');
}
foreach(new DirectoryIterator(__DIR__ . '/snippets/mini') as $file) {
	if ($file->getType() !== 'file') { continue; }

	$baseName = $file->getBasename('.php');
	$snippetName = "heroicons/mini/$baseName";
	$loadPath = "/snippets/mini/{$baseName}.php";
	$snippets []= compact('snippetName', 'loadPath');
}
foreach(new DirectoryIterator(__DIR__ . '/snippets/solid') as $file) {
	if ($file->getType() !== 'file') { continue; }

	$baseName = $file->getBasename('.php');
	$snippetName = "heroicons/solid/$baseName";
	$loadPath = "/snippets/solid/{$baseName}.php";
	$snippets []= compact('snippetName', 'loadPath');
}
foreach(new DirectoryIterator(__DIR__ . '/snippets/outline') as $file) {
	if ($file->getType() !== 'file') { continue; }

	$baseName = $file->getBasename('.php');
	$snippetName = "heroicons/outline/{$baseName}";
	$loadPath = "/snippets/outline/{$baseName}.php";
	$snippets []= compact('snippetName', 'loadPath');
}
$snippetsJoined = implode("\n", array_map(function($snippet) {
	return "		'{$snippet['snippetName']}' => __DIR__ . '{$snippet['loadPath']}',";
}, $snippets));

file_put_contents('index.php', <<<PHP
<?php
use Kirby\Cms\App;
use Kirby\Toolkit\F;

class Heroicons
{
	public static function folder(): string
	{
		\$asset = kirby()->plugins()['adamkiss/heroicons']->asset('spritesheet.svg');
		if (! F::exists(\$asset->mediaRoot())) {
			F::copy(
				__DIR__ . '/assets/spritesheet.svg',
				\$asset->mediaRoot(),
				true // to overwrite the symlink that might exist at the location
			);
		}

		return pathinfo(
			\$asset->mediaRoot(),
			PATHINFO_DIRNAME
		);
	}
	public static function sprite() : string
	{
		return 'spritesheet.svg';
	}
}

App::plugin('adamkiss/heroicons', [
	'snippets' => [
{$snippetsJoined}
	],
]);
PHP);

/**
 * Asset sprite for kirby-icon-field
 */
file_put_contents(__DIR__ . '/assets/spritesheet.svg', $spritesheet);