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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Console; |
| 6 | |
| 7 | use Stringable; |
| 8 | use ValueError; |
| 9 | |
| 10 | /** |
| 11 | * The output methods take a template and its arguments: the template is |
| 12 | * markup, e.g. `<green>done</green>` or `<strong>%d</strong>`, the |
| 13 | * arguments are data. They fill the template's sprintf() conversions |
| 14 | * and print as plain text, so no escaping is needed: |
| 15 | * |
| 16 | * $io->error('Cannot read <strong>%s</strong>', $path); |
| 17 | * |
| 18 | * Without arguments the template is not formatted, so `%` needs no |
| 19 | * doubling. Markup never fails: a tag without its partner prints |
| 20 | * literally. See Markup for the tag set. |
| 21 | * |
| 22 | * The terminal decides where the text goes and what it supports: the |
| 23 | * process streams by default, a Buffer in tests. |
| 24 | * |
| 25 | * @api |
| 26 | */ |
| 27 | final class Io |
| 28 | { |
| 29 | private readonly Markup $markup; |
| 30 | private bool $error = false; |
| 31 | |
| 32 | public function __construct( |
| 33 | private readonly Terminal $terminal = new Stdio(), |
| 34 | ) { |
| 35 | $this->markup = new Markup(); |
| 36 | } |
| 37 | |
| 38 | public function line(string $template = '', float|int|string|Stringable ...$args): void |
| 39 | { |
| 40 | $this->output($template, $args, PHP_EOL); |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Like line(), without the line break. |
| 45 | */ |
| 46 | public function write(string $template, float|int|string|Stringable ...$args): void |
| 47 | { |
| 48 | $this->output($template, $args, ''); |
| 49 | } |
| 50 | |
| 51 | public function success(string $template, float|int|string|Stringable ...$args): void |
| 52 | { |
| 53 | $this->output($template, $args, PHP_EOL, style: 'green'); |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Writes a yellow line to the error output. |
| 58 | */ |
| 59 | public function warn(string $template, float|int|string|Stringable ...$args): void |
| 60 | { |
| 61 | $this->output($template, $args, PHP_EOL, error: true, style: 'yellow'); |
| 62 | } |
| 63 | |
| 64 | /** |
| 65 | * Writes a red line to the error output. |
| 66 | */ |
| 67 | public function error(string $template, float|int|string|Stringable ...$args): void |
| 68 | { |
| 69 | $this->output($template, $args, PHP_EOL, error: true, style: 'red'); |
| 70 | } |
| 71 | |
| 72 | /** |
| 73 | * An Io for the error output: whatever it writes goes there, plain |
| 74 | * lines and the prompts' questions included. |
| 75 | * |
| 76 | * $io->stderr()->line(' - %s', $path); |
| 77 | */ |
| 78 | public function stderr(): self |
| 79 | { |
| 80 | $io = clone $this; |
| 81 | $io->error = true; |
| 82 | |
| 83 | return $io; |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * Escapes markup tags and strips control characters (keeping |
| 88 | * newlines and tabs) so the text prints literally where it is |
| 89 | * concatenated into a template; arguments need no escaping. |
| 90 | * |
| 91 | * The result is meant for the output methods: it carries invisible |
| 92 | * markers that keep a `%` from reading as a sprintf() conversion and |
| 93 | * a tag after a trailing backslash from reading as escaped. |
| 94 | */ |
| 95 | public function escape(string $text): string |
| 96 | { |
| 97 | return $this->markup->escape($text); |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Pads the text with spaces to the visible width `$width`; markup |
| 102 | * tags and multibyte characters don't count, wider text is |
| 103 | * returned unchanged. |
| 104 | */ |
| 105 | public function pad(string $text, int $width, Align $align = Align::Left): string |
| 106 | { |
| 107 | return $this->markup->pad($text, $width, $align); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Writes a horizontal rule: the char repeated across the terminal. |
| 112 | * |
| 113 | * `$max` caps the width like in `indent()`; a negative one counts as |
| 114 | * 0. The char may be a multi-char pattern and may carry markup — the |
| 115 | * repeat count uses its visible width: `$io->rule('<dim>─</dim>')` |
| 116 | * draws a dim line. |
| 117 | */ |
| 118 | public function rule(string $char = '─', ?int $max = null): void |
| 119 | { |
| 120 | $width = $this->terminal->width(); |
| 121 | |
| 122 | if ($max !== null && $max < $width) { |
| 123 | $width = max(0, $max); |
| 124 | } |
| 125 | |
| 126 | $unit = $this->markup->width($char); |
| 127 | |
| 128 | if ($unit < 1) { |
| 129 | throw new ValueError("Rule char '{$char}' has no visible width"); |
| 130 | } |
| 131 | |
| 132 | $this->line(str_repeat($char, intdiv($width, $unit))); |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Prints the question, and the default if there is one, and reads one |
| 137 | * line. A trimmed empty answer, or the end of input, yields the |
| 138 | * default. |
| 139 | */ |
| 140 | public function ask(string $question, string $default = ''): string |
| 141 | { |
| 142 | $this->write($question); |
| 143 | |
| 144 | if ($default !== '') { |
| 145 | $this->write(' [%s]', $default); |
| 146 | } |
| 147 | |
| 148 | $this->write(' '); |
| 149 | $answer = trim($this->terminal->read() ?? ''); |
| 150 | |
| 151 | return $answer === '' ? $default : $answer; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Asks for input that must not show while typing, such as a password. |
| 156 | * |
| 157 | * The answer keeps its whitespace. A terminal that fails to hide the |
| 158 | * input throws rather than reading visibly; Stdio has no way to hide |
| 159 | * it on Windows and reads visibly there, see Stdio::read(). |
| 160 | */ |
| 161 | public function secret(string $question): string |
| 162 | { |
| 163 | $this->write($question . ' '); |
| 164 | |
| 165 | return $this->terminal->read(hidden: true) ?? ''; |
| 166 | } |
| 167 | |
| 168 | /** |
| 169 | * Asks a yes/no question and returns the answer as bool. |
| 170 | * |
| 171 | * An empty answer yields the default; an answer starting with `y` or |
| 172 | * `Y` means yes, anything else no. |
| 173 | */ |
| 174 | public function confirm(string $question, bool $default = false): bool |
| 175 | { |
| 176 | $answer = strtolower($this->ask($question . ($default ? ' [Y/n]' : ' [y/N]'))); |
| 177 | |
| 178 | if ($answer === '') { |
| 179 | return $default; |
| 180 | } |
| 181 | |
| 182 | return str_starts_with($answer, 'y'); |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Asks to pick one of the options and returns its key. |
| 187 | * |
| 188 | * The labels are listed numbered from 1, and the prompt shows the |
| 189 | * default's number: `[1]`. An empty answer, or the end of input, |
| 190 | * yields the default, the first option unless given; any other answer |
| 191 | * must be a listed number — an invalid one asks again. |
| 192 | * |
| 193 | * @template K of array-key |
| 194 | * |
| 195 | * @param array<K, string> $options |
| 196 | * @param K|null $default |
| 197 | * |
| 198 | * @return K |
| 199 | */ |
| 200 | public function choice(string $question, array $options, int|string|null $default = null): int|string |
| 201 | { |
| 202 | if ($options === []) { |
| 203 | throw new ValueError('Choice needs options'); |
| 204 | } |
| 205 | |
| 206 | $default ??= array_key_first($options); |
| 207 | |
| 208 | if (!array_key_exists($default, $options)) { |
| 209 | throw new ValueError("Choice default '{$default}' is not an option"); |
| 210 | } |
| 211 | |
| 212 | $keys = array_keys($options); |
| 213 | $number = array_flip($keys)[$default] + 1; |
| 214 | $this->line($question); |
| 215 | |
| 216 | foreach (array_values($options) as $i => $label) { |
| 217 | $this->line(' %d) %s', $i + 1, $label); |
| 218 | } |
| 219 | |
| 220 | while (true) { |
| 221 | $answer = $this->ask("[{$number}]"); |
| 222 | |
| 223 | if ($answer === '') { |
| 224 | return $keys[$number - 1]; |
| 225 | } |
| 226 | |
| 227 | if (preg_match('/^\d+\z/', $answer) === 1 && (int) $answer >= 1 && (int) $answer <= count($keys)) { |
| 228 | return $keys[(int) $answer - 1]; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | /** |
| 234 | * Whether someone can see the prompts and answer them. |
| 235 | */ |
| 236 | public function interactive(): bool |
| 237 | { |
| 238 | return $this->terminal->interactive(); |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * The terminal width in columns. |
| 243 | */ |
| 244 | public function width(): int |
| 245 | { |
| 246 | return $this->terminal->width(); |
| 247 | } |
| 248 | |
| 249 | /** @param array<float|int|string|Stringable> $args */ |
| 250 | private function output(string $template, array $args, string $end, bool $error = false, string $style = ''): void |
| 251 | { |
| 252 | $error = $error || $this->error; |
| 253 | $text = $this->markup->render($template, array_values($args), $this->terminal->colors($error), $style); |
| 254 | $this->terminal->write($text . $end, $error); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Indents the text and wraps it on its visible width; markup tags |
| 259 | * and multibyte characters don't count. `$max` caps the total line |
| 260 | * width: the text wraps as if the terminal were at most that wide. |
| 261 | * A negative `$indent` counts as 0. |
| 262 | */ |
| 263 | public function indent( |
| 264 | string $text, |
| 265 | int $indent, |
| 266 | ?int $max = null, |
| 267 | ): string { |
| 268 | $indent = max(0, $indent); |
| 269 | $spaces = str_repeat(' ', $indent); |
| 270 | $terminal = $this->terminal->width(); |
| 271 | |
| 272 | if ($max !== null && $max < $terminal) { |
| 273 | $terminal = $max; |
| 274 | } |
| 275 | |
| 276 | $width = $terminal - $indent; |
| 277 | |
| 278 | $lines = []; |
| 279 | |
| 280 | foreach (explode("\n", $text) as $line) { |
| 281 | foreach ($this->wrap($line, $width) as $wrapped) { |
| 282 | $lines[] = $wrapped === '' ? '' : $spaces . $wrapped; |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | return implode("\n", $lines); |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Wraps one line at spaces; a word longer than the width overflows. |
| 291 | * |
| 292 | * @return list<string> |
| 293 | */ |
| 294 | private function wrap(string $line, int $width): array |
| 295 | { |
| 296 | $lines = []; |
| 297 | $current = null; |
| 298 | $currentWidth = 0; |
| 299 | |
| 300 | foreach (explode(' ', $line) as $word) { |
| 301 | $wordWidth = $this->markup->width($word); |
| 302 | |
| 303 | if ($current !== null && ($currentWidth + 1 + $wordWidth) <= $width) { |
| 304 | $current .= ' ' . $word; |
| 305 | $currentWidth += 1 + $wordWidth; |
| 306 | |
| 307 | continue; |
| 308 | } |
| 309 | |
| 310 | if ($current !== null) { |
| 311 | $lines[] = $current; |
| 312 | } |
| 313 | |
| 314 | $current = $word; |
| 315 | $currentWidth = $wordWidth; |
| 316 | } |
| 317 | |
| 318 | $lines[] = (string) $current; |
| 319 | |
| 320 | return $lines; |
| 321 | } |
| 322 | } |