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<?php

class Passthrough
{

	public static function getGroupDropdown(array &$row): array
	{
		$out = [];
		if ($row['class'] === '0300') {
			foreach (['GPU', 'GVT'] as $id) {
				$out[] = [
					'ptid' => $id,
					'ptname' => $id,
					'selected' => ($row['@PASSTHROUGH'] === $id ? 'selected' : ''),
				];
			}
			return $out;
		}
		static $list = false;
		if ($list === false) {
			$list = Database::queryKeyValueList("SELECT groupid, title FROM passthrough_group ORDER BY groupid");
			self::ensurePrepopulated($list);
		}
		$row['custom_groups'] = true;
		foreach ($list as $id => $title) {
			if ($id === 'GPU' || $id === 'GVT')
				continue;
			$item = ['ptid' => $id, 'ptname' => $id . ' (' . $title . ')'];
			if ($row['@PASSTHROUGH'] === $id) {
				$item['selected'] = 'selected';
			}
			$out[] = $item;
		}
		return $out;
	}

	private static function ensurePrepopulated(&$list)
	{
		$want = [
			'GPU' => '[Special] GPU passthrough default group',
			'GVT' => '[Special] Intel GVT-g default group',
		];
		foreach ($want as $id => $title) {
			if (!isset($list[$id])) {
				Database::exec("INSERT INTO passthrough_group (groupid, title) VALUES (:id, :title)
					ON DUPLICATE KEY UPDATE title = VALUES(title)",
					['id' => $id, 'title' => $title]);
				$list[$id] = $title;
			}
		}
	}

}