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janbarasekjanbarasek
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Add static helpers
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‎src/Helpers/Czech.php‎

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<?php
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declare(strict_types=1);
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namespace Mathematicator\Engine\Helper;
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use Mathematicator\Engine\MathematicatorException;
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use Nette\StaticClass;
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class Czech
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{
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use StaticClass;
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/**
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* Format number and string by count of items by czech grammar.
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*
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* inflection($count, ['zájezd', 'zájezdy', 'zájezdů']) => 1 zájezd, 3 zájezdy, 24 zájezdů
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*
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* @param int $number
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* @param string[] $parameters
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* @return string
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* @throws MathematicatorException
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*/
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public static function inflection(int $number, array $parameters): string
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{
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$numberTxt = number_format($number, 0, '.', ' ');
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$parameters = Safe::strictScalarType($parameters);
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if (!isset($parameters[0], $parameters[1], $parameters[2])) {
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throw new MathematicatorException(
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'Parameter [0, 1, 2] does not set. Given: ["' . implode('", "', $parameters) . '"].'
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);
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}
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[$for1, $for234, $forOthers] = $parameters;
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if (!$number) {
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$result = '0 ' . $forOthers;
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} elseif ($number === 1) {
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$result = '1 ' . $for1;
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} elseif ($number >= 2 && $number <= 4) {
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$result = $numberTxt . ' ' . $for234;
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} else {
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$result = $numberTxt . ' ' . $forOthers;
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}
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return $result;
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}
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}

‎src/Helpers/DateTime.php‎

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<?php
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declare(strict_types=1);
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namespace Mathematicator\Engine\Helper;
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use Mathematicator\Engine\MathematicatorException;
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use Nette\StaticClass;
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class DateTime
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{
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use StaticClass;
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/**
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* Format datetime to "Y-m-d H:i:s", if null return current datetime.
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*
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* @param int|null $timestamp
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* @return string (Y-m-d H:i:s)
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*/
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public static function getDateTimeIso(int $timestamp = null): string
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{
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return date('Y-m-d H:i:s', $timestamp ?? \time());
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}
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/**
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* @param int $time
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* @param bool $moreAccurate
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* @param string $lang [cz, sk, en]
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* @return string
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* @throws MathematicatorException
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*/
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public static function formatTimeAgo(int $time, bool $moreAccurate = true, string $lang = 'cz'): string
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{
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if ($lang === 'cz') {
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$labels = [
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['sekunda', 'sekundy', 'sekund'],
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['minuta', 'minuty', 'minut'],
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['hodina', 'hodiny', 'hodin'],
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['den', 'dny', 'dní'],
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['měsíc', 'měsíce', 'měsíců'],
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['rok', 'roky', 'let'],
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];
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} elseif ($lang === 'sk') {
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$labels = [
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['sekunda', 'sekundy', 'sekúnd'],
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['minúta', 'minúty', 'minút'],
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['hodina', 'hodiny', 'hodín'],
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['deň', 'dni', 'dní'],
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['mesiac', 'mesiace', 'mesiacov'],
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['rok', 'roky', 'rokov'],
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];
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} elseif ($lang === 'en') {
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$labels = ['second', 'minute', 'hour', 'day', 'month', 'year'];
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} else {
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throw new MathematicatorException('Unsupported lang "' . $lang . '" (supported languages: cz/sk/en)');
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}
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$currentTime = time();
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$diff = $currentTime - $time;
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$no = 0;
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$lengths = [1, 60, 3600, 86400, 2630880, 31570560];
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$v = \count($lengths) - 1;
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for (true; ($v >= 0) && (($no = $diff / $lengths[$v]) <= 1); true) {
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$v--;
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}
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if ($v < 0) {
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$v = 0;
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}
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$x = $currentTime - ($diff % $lengths[$v]);
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$no = (int) floor($no);
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$label = null;
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if (isset($labels[$v]) && \is_string($labels[$v])) {
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$label = $labels[$v];
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if ($lang === 'en' && $no !== 1) {
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$label .= 's';
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}
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} elseif (\is_array($labels[$v])) {
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if ($no === 1) {
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$label = $labels[$v][0];
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} elseif ($no >= 2 && $no <= 4) {
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$label = $labels[$v][1];
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} else {
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$label = $labels[$v][2];
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}
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}
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$result = $no . ' ' . $label . ' ';
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if ($moreAccurate && ($v >= 1) && (($currentTime - $x) > 0)) {
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$result .= self::formatTimeAgo($x, false, $lang);
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}
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return trim($result);
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}
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}

‎src/Helpers/Safe.php‎

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<?php
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declare(strict_types=1);
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namespace Mathematicator\Engine\Helper;
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use Nette\StaticClass;
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class Safe
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{
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use StaticClass;
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/**
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* Convert dirty haystack to scalar haystack. If object implements __toString(), it will be called automatically.
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*
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* @param mixed $haystack
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* @param bool $rewriteObjectsToString
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* @return mixed
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*/
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public static function strictScalarType($haystack, bool $rewriteObjectsToString = true)
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{
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if (\is_array($haystack)) {
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$return = [];
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foreach ($haystack as $key => $value) {
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$return[$key] = self::strictScalarType($value, $rewriteObjectsToString);
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}
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return $return;
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}
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if (\is_scalar($haystack)) {
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return $haystack;
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}
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if (\is_object($haystack)) {
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if ($rewriteObjectsToString === true && method_exists($haystack, '__toString')) {
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return (string) $haystack;
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}
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return get_class($haystack);
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}
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return $haystack;
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}
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}

‎src/Helpers/Terminal.php‎

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<?php
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declare(strict_types=1);
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namespace Mathematicator\Engine\Helper;
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use Mathematicator\Engine\MathematicatorException;
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use Nette\StaticClass;
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class Terminal
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{
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use StaticClass;
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/**
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* @var int
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*/
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private static $staticTtl = 0;
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/**
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* Render code snippet to Terminal.
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*
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* @param string $path
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* @param int|null $line -> if not null mark selected line by red color
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*/
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public static function code(string $path, int $line = null): void
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{
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echo "\n" . $path . ($line === null ? '' : ' [on line ' . $line . ']') . "\n\n";
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if (\is_file($path)) {
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echo '----- file -----' . "\n";
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$file = str_replace(["\r\n", "\r"], "\n", (string) file_get_contents($path));
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$fileParser = explode("\n", $file);
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$start = $line > 8 ? $line - 8 : 0;
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for ($i = $start; $i <= $start + 15; $i++) {
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if (!isset($fileParser[$i])) {
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break;
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}
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$currentLine = $i + 1;
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$highlight = $line === $currentLine;
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echo ($highlight ? "\e[1;37m\e[41m" : "\e[100m")
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. str_pad(' ' . $currentLine . ': ', 6, ' ') . ($highlight ? '' : "\e[0m")
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. str_replace("\t", ' ', $fileParser[$i])
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. ($highlight ? "\e[0m" : '')
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. "\n";
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}
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echo '----- file -----' . "\n\n";
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}
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}
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/**
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* Ask question in Terminal and return user answer (string or null if empty).
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*
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* Function will be asked since user give valid answer.
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*
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* @param string $question -> only display to user
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* @param string[]|null $possibilities -> if empty, answer can be every valid string or null.
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* @return string|null -> null if empty answer
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* @throws MathematicatorException
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*/
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public static function ask(string $question, ?array $possibilities = null): ?string
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{
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self::$staticTtl = 0;
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echo "\n" . str_repeat('-', 100) . "\n";
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if ($possibilities !== [] && $possibilities !== null) {
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$renderPossibilities = static function (array $possibilities): string {
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$return = '';
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$containsNull = false;
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foreach ($possibilities as $possibility) {
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if ($possibility !== null) {
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$return .= ($return === '' ? '' : '", "') . $possibility;
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} elseif ($containsNull === false) {
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$containsNull = true;
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}
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}
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return 'Possible values: "' . $return . '"' . ($containsNull ? ' or press ENTER' : '') . '.';
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};
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echo $renderPossibilities($possibilities) . "\n";
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}
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echo 'Q: ' . trim($question) . "\n" . 'A: ';
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$fOpen = fopen('php://stdin', 'rb');
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if (\is_resource($fOpen) === false) {
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throw new MathematicatorException('Problem with opening "php://stdin".');
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}
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$input = trim((string) fgets($fOpen));
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echo "\n";
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$input = $input === '' ? null : $input;
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if ($possibilities !== [] && $possibilities !== null) {
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if (\in_array($input, $possibilities, true)) {
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return $input;
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}
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self::renderError('!!! Invalid answer !!!');
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self::$staticTtl++;
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if (self::$staticTtl > 16) {
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throw new MathematicatorException(
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'The maximum invalid response limit was exceeded. Current limit: ' . self::$staticTtl
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);
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}
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return self::ask($question, $possibilities);
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}
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return $input;
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}
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/**
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* Render red block with error message.
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*
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* @param string $message
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*/
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public static function renderError(string $message): void
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{
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echo "\033[1;37m\033[41m";
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for ($i = 0; $i < 100; $i++) {
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echo ' ';
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}
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echo "\n" . str_pad(' ' . $message . ' ', 100) . "\n";
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for ($i = 0; $i < 100; $i++) {
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echo ' ';
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}
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echo "\033[0m";
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}
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}

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