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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Console; |
| 6 | |
| 7 | use RuntimeException; |
| 8 | use ValueError; |
| 9 | |
| 10 | /** |
| 11 | * The echo methods render the inline console markup, e.g. |
| 12 | * `<green>done</green>` or `<strong>1</strong>`; see Markup for the tag |
| 13 | * set and passthrough rules. Use `escape()` for text that must print |
| 14 | * literally. The message helpers treat their input as plain text. |
| 15 | * |
| 16 | * @api |
| 17 | */ |
| 18 | class Io |
| 19 | { |
| 20 | private readonly Markup $markup; |
| 21 | private mixed $stream = null; |
| 22 | private mixed $errorStream = null; |
| 23 | private mixed $inputStream = null; |
| 24 | private ?int $width = null; |
| 25 | |
| 26 | public function __construct( |
| 27 | protected readonly string $target = 'php://stdout', |
| 28 | protected readonly string $errorTarget = 'php://stderr', |
| 29 | protected readonly string $inputTarget = 'php://stdin', |
| 30 | ) { |
| 31 | $this->markup = new Markup(); |
| 32 | } |
| 33 | |
| 34 | public function echo(string $text): void |
| 35 | { |
| 36 | $stream = $this->stdout(); |
| 37 | $this->write($stream, $this->markup->render($text, $this->hasColorSupport($stream))); |
| 38 | } |
| 39 | |
| 40 | public function echoln(string $text): void |
| 41 | { |
| 42 | $stream = $this->stdout(); |
| 43 | $this->write($stream, $this->markup->render($text, $this->hasColorSupport($stream)) . PHP_EOL); |
| 44 | } |
| 45 | |
| 46 | public function echoErr(string $text): void |
| 47 | { |
| 48 | $stream = $this->stderr(); |
| 49 | $this->write($stream, $this->markup->render($text, $this->hasColorSupport($stream))); |
| 50 | } |
| 51 | |
| 52 | public function echolnErr(string $text): void |
| 53 | { |
| 54 | $stream = $this->stderr(); |
| 55 | $this->write($stream, $this->markup->render($text, $this->hasColorSupport($stream)) . PHP_EOL); |
| 56 | } |
| 57 | |
| 58 | /** |
| 59 | * Escapes markup tags and strips control characters (keeping |
| 60 | * newlines and tabs) so the text prints literally. |
| 61 | */ |
| 62 | public function escape(string $text): string |
| 63 | { |
| 64 | return $this->markup->escape($text); |
| 65 | } |
| 66 | |
| 67 | public function info(string $message): void |
| 68 | { |
| 69 | $this->echoln($this->escape($message)); |
| 70 | } |
| 71 | |
| 72 | public function success(string $message): void |
| 73 | { |
| 74 | $this->echoln('<green>' . $this->escape($message) . '</green>'); |
| 75 | } |
| 76 | |
| 77 | public function warn(string $message): void |
| 78 | { |
| 79 | $this->echolnErr('<yellow>' . $this->escape($message) . '</yellow>'); |
| 80 | } |
| 81 | |
| 82 | public function error(string $message): void |
| 83 | { |
| 84 | $this->echolnErr('<red>' . $this->escape($message) . '</red>'); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * Writes a horizontal rule: the char repeated across the terminal. |
| 89 | * |
| 90 | * `$max` caps the width like in `indent()`. The char may be a |
| 91 | * multi-char pattern and may carry markup — the repeat count uses |
| 92 | * its visible width: `$io->rule('<dim>─</dim>')` draws a dim line. |
| 93 | */ |
| 94 | public function rule(string $char = '─', ?int $max = null): void |
| 95 | { |
| 96 | $width = $this->terminalWidth(); |
| 97 | |
| 98 | if ($max !== null && $max < $width) { |
| 99 | $width = $max; |
| 100 | } |
| 101 | |
| 102 | $unit = $this->markup->width($char); |
| 103 | |
| 104 | if ($unit < 1) { |
| 105 | throw new ValueError("Rule char '{$char}' has no visible width"); |
| 106 | } |
| 107 | |
| 108 | $this->echoln(str_repeat($char, intdiv($width, $unit))); |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * Prints the question and reads one line from the input stream. |
| 113 | * |
| 114 | * A trimmed empty answer (or end of input) yields the default. With |
| 115 | * `hidden` the terminal echo is switched off while typing, for example |
| 116 | * for passwords, and the answer keeps its whitespace; only the trailing |
| 117 | * newline is stripped. On Windows, or without a terminal, the input is |
| 118 | * simply read as is, visibly. |
| 119 | */ |
| 120 | public function ask(string $question, string $default = '', bool $hidden = false): string |
| 121 | { |
| 122 | $this->echo($question . ' '); |
| 123 | $line = $this->readline($hidden); |
| 124 | $answer = $hidden ? rtrim($line, characters: "\r\n") : trim($line); |
| 125 | |
| 126 | return $answer === '' ? $default : $answer; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Asks a yes/no question and returns the answer as bool. |
| 131 | * |
| 132 | * An empty answer yields the default; an answer starting with `y` or |
| 133 | * `Y` means yes, anything else no. |
| 134 | */ |
| 135 | public function confirm(string $question, bool $default = false): bool |
| 136 | { |
| 137 | $answer = strtolower($this->ask($question . ($default ? ' [Y/n]' : ' [y/N]'))); |
| 138 | |
| 139 | if ($answer === '') { |
| 140 | return $default; |
| 141 | } |
| 142 | |
| 143 | return str_starts_with($answer, 'y'); |
| 144 | } |
| 145 | |
| 146 | private function readline(bool $hidden): string |
| 147 | { |
| 148 | $stream = $this->stdin(); |
| 149 | |
| 150 | // No stty on Windows; shell_exec would leak its error output. |
| 151 | if ($hidden && DIRECTORY_SEPARATOR !== '\\' && stream_isatty($stream)) { |
| 152 | // @codeCoverageIgnoreStart |
| 153 | /** @psalm-suppress ForbiddenCode */ |
| 154 | $previous = trim((string) shell_exec('stty -g')); |
| 155 | |
| 156 | /** @psalm-suppress ForbiddenCode */ |
| 157 | shell_exec('stty -echo'); |
| 158 | |
| 159 | try { |
| 160 | return (string) fgets($stream); |
| 161 | } finally { |
| 162 | // Restore the saved terminal state rather than assuming |
| 163 | // echo was on, even when reading throws. |
| 164 | /** @psalm-suppress ForbiddenCode */ |
| 165 | shell_exec($previous === '' ? 'stty echo' : 'stty ' . escapeshellarg($previous)); |
| 166 | $this->echo(PHP_EOL); |
| 167 | } |
| 168 | |
| 169 | // @codeCoverageIgnoreEnd |
| 170 | } |
| 171 | |
| 172 | return (string) fgets($stream); |
| 173 | } |
| 174 | |
| 175 | private function write(mixed $stream, string $text): void |
| 176 | { |
| 177 | fwrite($stream, $text); |
| 178 | fflush($stream); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Indents the text and wraps it on its visible width; markup tags |
| 183 | * and multibyte characters don't count. `$max` caps the total line |
| 184 | * width: the text wraps as if the terminal were at most that wide. |
| 185 | */ |
| 186 | public function indent( |
| 187 | string $text, |
| 188 | int $indent, |
| 189 | ?int $max = null, |
| 190 | ): string { |
| 191 | $spaces = str_repeat(' ', $indent); |
| 192 | $terminal = $this->terminalWidth(); |
| 193 | |
| 194 | if ($max !== null && $max < $terminal) { |
| 195 | $terminal = $max; |
| 196 | } |
| 197 | |
| 198 | $width = $terminal - $indent; |
| 199 | |
| 200 | $lines = []; |
| 201 | |
| 202 | foreach (explode("\n", $text) as $line) { |
| 203 | foreach ($this->wrap($line, $width) as $wrapped) { |
| 204 | $lines[] = $wrapped === '' ? '' : $spaces . $wrapped; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | return implode("\n", $lines); |
| 209 | } |
| 210 | |
| 211 | /** |
| 212 | * Wraps one line at spaces; a word longer than the width overflows. |
| 213 | * |
| 214 | * @return list<string> |
| 215 | */ |
| 216 | private function wrap(string $line, int $width): array |
| 217 | { |
| 218 | $lines = []; |
| 219 | $current = null; |
| 220 | $currentWidth = 0; |
| 221 | |
| 222 | foreach (explode(' ', $line) as $word) { |
| 223 | $wordWidth = $this->markup->width($word); |
| 224 | |
| 225 | if ($current !== null && ($currentWidth + 1 + $wordWidth) <= $width) { |
| 226 | $current .= ' ' . $word; |
| 227 | $currentWidth += 1 + $wordWidth; |
| 228 | |
| 229 | continue; |
| 230 | } |
| 231 | |
| 232 | if ($current !== null) { |
| 233 | $lines[] = $current; |
| 234 | } |
| 235 | |
| 236 | $current = $word; |
| 237 | $currentWidth = $wordWidth; |
| 238 | } |
| 239 | |
| 240 | $lines[] = (string) $current; |
| 241 | |
| 242 | return $lines; |
| 243 | } |
| 244 | |
| 245 | private function terminalWidth(): int |
| 246 | { |
| 247 | if ($this->width !== null) { |
| 248 | return $this->width; |
| 249 | } |
| 250 | |
| 251 | $columns = (int) getenv('COLUMNS'); |
| 252 | |
| 253 | // No tput on Windows; shell_exec would leak its error output. |
| 254 | if ($columns < 1 && DIRECTORY_SEPARATOR !== '\\' && stream_isatty($this->stdout())) { |
| 255 | // @codeCoverageIgnoreStart |
| 256 | /** @psalm-suppress ForbiddenCode */ |
| 257 | $columns = (int) shell_exec('tput cols'); |
| 258 | |
| 259 | // @codeCoverageIgnoreEnd |
| 260 | } |
| 261 | |
| 262 | if ($columns < 1) { |
| 263 | // @codeCoverageIgnoreStart |
| 264 | $columns = 80; |
| 265 | |
| 266 | // @codeCoverageIgnoreEnd |
| 267 | } |
| 268 | |
| 269 | return $this->width = $columns; |
| 270 | } |
| 271 | |
| 272 | protected function stdout(): mixed |
| 273 | { |
| 274 | return $this->stream ??= $this->open($this->target, 'w'); |
| 275 | } |
| 276 | |
| 277 | protected function stderr(): mixed |
| 278 | { |
| 279 | return $this->errorStream ??= $this->open($this->errorTarget, 'w'); |
| 280 | } |
| 281 | |
| 282 | protected function stdin(): mixed |
| 283 | { |
| 284 | return $this->inputStream ??= $this->open($this->inputTarget, 'r'); |
| 285 | } |
| 286 | |
| 287 | private function open(string $target, string $mode): mixed |
| 288 | { |
| 289 | set_error_handler(static fn(): bool => true); |
| 290 | |
| 291 | try { |
| 292 | $stream = fopen($target, $mode); |
| 293 | } finally { |
| 294 | restore_error_handler(); |
| 295 | } |
| 296 | |
| 297 | if ($stream === false) { |
| 298 | throw new RuntimeException("Could not open stream '{$target}'"); |
| 299 | } |
| 300 | |
| 301 | return $stream; |
| 302 | } |
| 303 | |
| 304 | protected function hasColorSupport(mixed $stream): bool |
| 305 | { |
| 306 | $noColor = getenv('NO_COLOR'); |
| 307 | |
| 308 | if ($noColor !== false && $noColor !== '') { |
| 309 | return false; |
| 310 | } |
| 311 | |
| 312 | $force = getenv('FORCE_COLOR'); |
| 313 | |
| 314 | if ($force !== false) { |
| 315 | return $force !== '0' && strtolower($force) !== 'false'; |
| 316 | } |
| 317 | |
| 318 | $terminal = stream_isatty($stream); |
| 319 | |
| 320 | // @codeCoverageIgnoreStart |
| 321 | if (DIRECTORY_SEPARATOR === '\\' && $terminal) { |
| 322 | // VT100 processing is off by default in cmd/PowerShell; |
| 323 | // enabling it reports whether the console supports it. |
| 324 | return sapi_windows_vt100_support($stream, enable: true); |
| 325 | } |
| 326 | |
| 327 | // @codeCoverageIgnoreEnd |
| 328 | |
| 329 | return $terminal; |
| 330 | } |
| 331 | } |