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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celemas\Verba\Tool; |
| 6 | |
| 7 | /** |
| 8 | * Extracts `__`, `__n`, `__d`, and `__dn` calls from frontend source across a |
| 9 | * range of dialects — `.js`, `.ts`, `.jsx`, `.tsx`, `.svelte`, and `.vue` — with |
| 10 | * one shared character lexer that skips strings, template literals, and |
| 11 | * comments. Only literal string arguments are captured. |
| 12 | * |
| 13 | * The JS dialects and `.svelte` are lexed whole (quoted strings are skipped, so |
| 14 | * a literal attribute like `title="Delete"` is not mistaken for a call). In |
| 15 | * `.vue`, `<script>` blocks are lexed the same way while the template treats |
| 16 | * quoted attribute values as expression context, so `:title="__('Save')"` is |
| 17 | * found. HTML comments are always skipped. Calls inside template-literal |
| 18 | * interpolations are not extracted. |
| 19 | * |
| 20 | * @api |
| 21 | */ |
| 22 | final class FrontendScanner extends FileScanner |
| 23 | { |
| 24 | #[\Override] |
| 25 | protected function extensions(): array |
| 26 | { |
| 27 | return ['js', 'ts', 'jsx', 'tsx', 'svelte', 'vue']; |
| 28 | } |
| 29 | |
| 30 | #[\Override] |
| 31 | protected function scanCode(string $code, string $file): void |
| 32 | { |
| 33 | if (strtolower(pathinfo($file, PATHINFO_EXTENSION)) === 'vue') { |
| 34 | $this->scanVue($code, $file); |
| 35 | |
| 36 | return; |
| 37 | } |
| 38 | |
| 39 | $this->collect($code, $file, 0, false); |
| 40 | } |
| 41 | |
| 42 | private function scanVue(string $code, string $file): void |
| 43 | { |
| 44 | $offset = 0; |
| 45 | preg_match_all( |
| 46 | '#<script\b[^>]*>(.*?)</script>#is', |
| 47 | $code, |
| 48 | $matches, |
| 49 | PREG_OFFSET_CAPTURE | PREG_SET_ORDER, |
| 50 | ); |
| 51 | |
| 52 | foreach ($matches as $match) { |
| 53 | $whole = $match[0][0]; |
| 54 | $start = $match[0][1]; |
| 55 | $inner = $match[1][0]; |
| 56 | $innerStart = $match[1][1]; |
| 57 | |
| 58 | $this->collect( |
| 59 | substr($code, $offset, $start - $offset), |
| 60 | $file, |
| 61 | $this->lineAt($code, $offset), |
| 62 | true, |
| 63 | ); |
| 64 | $this->collect($inner, $file, $this->lineAt($code, $innerStart), false); |
| 65 | $offset = $start + strlen($whole); |
| 66 | } |
| 67 | |
| 68 | $this->collect(substr($code, $offset), $file, $this->lineAt($code, $offset), true); |
| 69 | } |
| 70 | |
| 71 | private function lineAt(string $code, int $offset): int |
| 72 | { |
| 73 | return substr_count($code, "\n", 0, $offset); |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * Walks $code finding calls. String literals are skipped unless $transparent |
| 78 | * (a markup region where quotes delimit attributes, not JS strings). |
| 79 | */ |
| 80 | private function collect(string $code, string $file, int $lineBase, bool $transparent): void |
| 81 | { |
| 82 | $length = strlen($code); |
| 83 | $i = 0; |
| 84 | |
| 85 | while ($i < $length) { |
| 86 | $char = $code[$i]; |
| 87 | |
| 88 | if (substr($code, $i, 4) === '<!--') { |
| 89 | $i = $this->skipTo($code, $i + 4, '-->'); |
| 90 | |
| 91 | continue; |
| 92 | } |
| 93 | |
| 94 | if (substr($code, $i, 2) === '//') { |
| 95 | $i = $this->skipTo($code, $i + 2, "\n"); |
| 96 | |
| 97 | continue; |
| 98 | } |
| 99 | |
| 100 | if (substr($code, $i, 2) === '/*') { |
| 101 | $i = $this->skipTo($code, $i + 2, '*/'); |
| 102 | |
| 103 | continue; |
| 104 | } |
| 105 | |
| 106 | if ($char === '`' || !$transparent && ($char === '"' || $char === "'")) { |
| 107 | $i = $this->skipString($code, $i, $char); |
| 108 | |
| 109 | continue; |
| 110 | } |
| 111 | |
| 112 | if (!$this->isNameStart($char)) { |
| 113 | $i++; |
| 114 | |
| 115 | continue; |
| 116 | } |
| 117 | |
| 118 | $i = $this->identifier($code, $i, $file, $lineBase); |
| 119 | } |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Reads the identifier at $start and, when it is one of the call names used |
| 124 | * as a function, records it. Returns the index to continue from. |
| 125 | */ |
| 126 | private function identifier(string $code, int $start, string $file, int $lineBase): int |
| 127 | { |
| 128 | $length = strlen($code); |
| 129 | $end = $start; |
| 130 | |
| 131 | while ($end < $length && $this->isNamePart($code[$end])) { |
| 132 | $end++; |
| 133 | } |
| 134 | |
| 135 | $name = substr($code, $start, $end - $start); |
| 136 | $prev = $start > 0 ? $code[$start - 1] : ''; |
| 137 | |
| 138 | if (!array_key_exists($name, self::CALLS) || $prev === '.' || $this->isNamePart($prev)) { |
| 139 | return $end; |
| 140 | } |
| 141 | |
| 142 | $open = $this->skipSpace($code, $end); |
| 143 | |
| 144 | if ($open >= $length || $code[$open] !== '(') { |
| 145 | return $end; |
| 146 | } |
| 147 | |
| 148 | [$args, $after] = $this->arguments($code, $open); |
| 149 | $this->emit($name, $args, $file . ':' . ($lineBase + substr_count($code, "\n", 0, $start) + 1)); |
| 150 | |
| 151 | return $after; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * @return array{list<?string>, int} |
| 156 | */ |
| 157 | private function arguments(string $code, int $open): array |
| 158 | { |
| 159 | $length = strlen($code); |
| 160 | $i = $open + 1; |
| 161 | $start = $i; |
| 162 | $depth = 0; |
| 163 | $args = []; |
| 164 | |
| 165 | while ($i < $length) { |
| 166 | $char = $code[$i]; |
| 167 | |
| 168 | if ($char === '"' || $char === "'" || $char === '`') { |
| 169 | $i = $this->skipString($code, $i, $char); |
| 170 | |
| 171 | continue; |
| 172 | } |
| 173 | |
| 174 | if ($char === '(' || $char === '[' || $char === '{') { |
| 175 | $depth++; |
| 176 | $i++; |
| 177 | |
| 178 | continue; |
| 179 | } |
| 180 | |
| 181 | if ($char === ')' && $depth === 0) { |
| 182 | $args[] = $this->literal(substr($code, $start, $i - $start)); |
| 183 | |
| 184 | return [$args, $i + 1]; |
| 185 | } |
| 186 | |
| 187 | if ($char === ')' || $char === ']' || $char === '}') { |
| 188 | $depth--; |
| 189 | $i++; |
| 190 | |
| 191 | continue; |
| 192 | } |
| 193 | |
| 194 | if ($char === ',' && $depth === 0) { |
| 195 | $args[] = $this->literal(substr($code, $start, $i - $start)); |
| 196 | $i++; |
| 197 | $start = $i; |
| 198 | |
| 199 | continue; |
| 200 | } |
| 201 | |
| 202 | $i++; |
| 203 | } |
| 204 | |
| 205 | return [$args, $length]; |
| 206 | } |
| 207 | |
| 208 | private function literal(string $raw): ?string |
| 209 | { |
| 210 | $raw = trim($raw); |
| 211 | |
| 212 | if ($raw === '') { |
| 213 | return null; |
| 214 | } |
| 215 | |
| 216 | $quote = $raw[0]; |
| 217 | |
| 218 | if ($quote !== '"' && $quote !== "'" && $quote !== '`') { |
| 219 | return null; |
| 220 | } |
| 221 | |
| 222 | $length = strlen($raw); |
| 223 | $value = ''; |
| 224 | |
| 225 | for ($i = 1; $i < $length; $i++) { |
| 226 | $char = $raw[$i]; |
| 227 | |
| 228 | if ($char === '\\') { |
| 229 | $value .= $this->unescape($raw[$i + 1] ?? ''); |
| 230 | $i++; |
| 231 | |
| 232 | continue; |
| 233 | } |
| 234 | |
| 235 | if ($quote === '`' && $char === '$' && ($raw[$i + 1] ?? '') === '{') { |
| 236 | return null; |
| 237 | } |
| 238 | |
| 239 | if ($char === $quote) { |
| 240 | return $i === ($length - 1) ? $value : null; |
| 241 | } |
| 242 | |
| 243 | $value .= $char; |
| 244 | } |
| 245 | |
| 246 | // The argument parser only passes balanced segments, so a quoted arg |
| 247 | // always closes above. |
| 248 | // @codeCoverageIgnoreStart |
| 249 | return null; |
| 250 | |
| 251 | // @codeCoverageIgnoreEnd |
| 252 | } |
| 253 | |
| 254 | private function unescape(string $char): string |
| 255 | { |
| 256 | return match ($char) { |
| 257 | 'n' => "\n", |
| 258 | 't' => "\t", |
| 259 | 'r' => "\r", |
| 260 | default => $char, |
| 261 | }; |
| 262 | } |
| 263 | |
| 264 | private function skipString(string $code, int $i, string $quote): int |
| 265 | { |
| 266 | $length = strlen($code); |
| 267 | |
| 268 | for ($i++; $i < $length; $i++) { |
| 269 | $char = $code[$i]; |
| 270 | |
| 271 | if ($char === '\\') { |
| 272 | $i++; |
| 273 | |
| 274 | continue; |
| 275 | } |
| 276 | |
| 277 | if ($quote === '`' && $char === '$' && ($code[$i + 1] ?? '') === '{') { |
| 278 | $i = $this->skipBraces($code, $i + 1) - 1; |
| 279 | |
| 280 | continue; |
| 281 | } |
| 282 | |
| 283 | if ($char === $quote) { |
| 284 | return $i + 1; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | return $length; |
| 289 | } |
| 290 | |
| 291 | private function skipBraces(string $code, int $i): int |
| 292 | { |
| 293 | $length = strlen($code); |
| 294 | $depth = 0; |
| 295 | |
| 296 | while ($i < $length) { |
| 297 | $char = $code[$i]; |
| 298 | |
| 299 | if ($char === '"' || $char === "'" || $char === '`') { |
| 300 | $i = $this->skipString($code, $i, $char); |
| 301 | |
| 302 | continue; |
| 303 | } |
| 304 | |
| 305 | if ($char === '{') { |
| 306 | $depth++; |
| 307 | $i++; |
| 308 | |
| 309 | continue; |
| 310 | } |
| 311 | |
| 312 | if ($char === '}') { |
| 313 | $depth--; |
| 314 | $i++; |
| 315 | |
| 316 | if ($depth === 0) { |
| 317 | return $i; |
| 318 | } |
| 319 | |
| 320 | continue; |
| 321 | } |
| 322 | |
| 323 | $i++; |
| 324 | } |
| 325 | |
| 326 | return $length; |
| 327 | } |
| 328 | |
| 329 | private function skipTo(string $code, int $from, string $needle): int |
| 330 | { |
| 331 | $at = strpos($code, $needle, $from); |
| 332 | |
| 333 | return $at === false ? strlen($code) : $at + strlen($needle); |
| 334 | } |
| 335 | |
| 336 | private function skipSpace(string $code, int $i): int |
| 337 | { |
| 338 | $length = strlen($code); |
| 339 | |
| 340 | while ( |
| 341 | $i < $length |
| 342 | && ($code[$i] === ' ' || $code[$i] === "\t" || $code[$i] === "\n" || $code[$i] === "\r") |
| 343 | ) { |
| 344 | $i++; |
| 345 | } |
| 346 | |
| 347 | return $i; |
| 348 | } |
| 349 | |
| 350 | private function isNameStart(string $char): bool |
| 351 | { |
| 352 | return $char === '_' || $char === '$' || ctype_alpha($char); |
| 353 | } |
| 354 | |
| 355 | private function isNamePart(string $char): bool |
| 356 | { |
| 357 | return $this->isNameStart($char) || ctype_digit($char); |
| 358 | } |
| 359 | } |