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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Icons; |
| 6 | |
| 7 | use Closure; |
| 8 | use Cosray\Config; |
| 9 | use Cosray\Exception\RuntimeException; |
| 10 | use Cosray\Util\Path; |
| 11 | use Cosray\Util\Svg; |
| 12 | use Override; |
| 13 | |
| 14 | final class Iconify implements Provider |
| 15 | { |
| 16 | /** @var Closure(string, int, string): ?string */ |
| 17 | private readonly Closure $fetch; |
| 18 | |
| 19 | public function __construct( |
| 20 | private readonly Config $config, |
| 21 | ?callable $fetch = null, |
| 22 | ) { |
| 23 | $this->fetch = $fetch === null |
| 24 | ? Closure::fromCallable([$this, 'request']) |
| 25 | : Closure::fromCallable($fetch); |
| 26 | } |
| 27 | |
| 28 | /** @param array<array-key, mixed> $args */ |
| 29 | #[Override] |
| 30 | public function icon(string $id, array $args = []): string |
| 31 | { |
| 32 | $parts = $this->split($id); |
| 33 | |
| 34 | if ($parts === null) { |
| 35 | return ''; |
| 36 | } |
| 37 | |
| 38 | $svg = $this->loadSvg($id, $parts['prefix'], $parts['name'], $args); |
| 39 | |
| 40 | return $svg ?? ''; |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * @return array{prefix: string, name: string}|null |
| 45 | */ |
| 46 | private function split(string $id): ?array |
| 47 | { |
| 48 | $id = trim($id); |
| 49 | |
| 50 | if (!preg_match( |
| 51 | '/^(?<prefix>[a-z0-9]+(?:[-_][a-z0-9]+)*):(?<name>[a-z0-9]+(?:[-_][a-z0-9]+)*)$/i', |
| 52 | $id, |
| 53 | $matches, |
| 54 | )) { |
| 55 | return null; |
| 56 | } |
| 57 | |
| 58 | $prefix = strtolower((string) $matches['prefix']); |
| 59 | $name = strtolower((string) $matches['name']); |
| 60 | |
| 61 | if ($prefix === '' || $name === '') { |
| 62 | return null; |
| 63 | } |
| 64 | |
| 65 | return ['prefix' => $prefix, 'name' => $name]; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Remote markup is inlined into pages, so it is sanitized for inline |
| 70 | * use, which also removes `<style>` elements. Cached files are |
| 71 | * sanitized again when read: they live in the public directory and may |
| 72 | * predate sanitizing. |
| 73 | * |
| 74 | * @param array<array-key, mixed> $args |
| 75 | */ |
| 76 | private function loadSvg(string $id, string $prefix, string $name, array $args): ?string |
| 77 | { |
| 78 | $file = $this->cacheFile($id, $args); |
| 79 | |
| 80 | if ($file !== null && is_file($file)) { |
| 81 | $cached = file_get_contents($file); |
| 82 | $svg = is_string($cached) ? Svg::sanitize($cached, inline: true) : null; |
| 83 | |
| 84 | if ($svg !== null) { |
| 85 | return $svg; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | $url = $this->iconUrl($prefix, $name, $args); |
| 90 | $iconify = $this->config->icons->iconify; |
| 91 | $fetched = ($this->fetch)($url, $iconify->timeout, $iconify->userAgent); |
| 92 | $svg = is_string($fetched) ? Svg::sanitize($fetched, inline: true) : null; |
| 93 | |
| 94 | if ($svg === null) { |
| 95 | return null; |
| 96 | } |
| 97 | |
| 98 | if ($file !== null) { |
| 99 | $this->store($file, $svg); |
| 100 | } |
| 101 | |
| 102 | return $svg; |
| 103 | } |
| 104 | |
| 105 | /** @param array<array-key, mixed> $args */ |
| 106 | private function iconUrl(string $prefix, string $name, array $args): string |
| 107 | { |
| 108 | $base = rtrim($this->config->icons->iconify->baseUrl, '/'); |
| 109 | $url = sprintf('%s/%s/%s.svg', $base, rawurlencode($prefix), rawurlencode($name)); |
| 110 | $query = $this->query($args); |
| 111 | |
| 112 | return $query === '' ? $url : $url . '?' . $query; |
| 113 | } |
| 114 | |
| 115 | /** @param array<array-key, mixed> $args */ |
| 116 | private function query(array $args): string |
| 117 | { |
| 118 | $args = $this->queryArgs($args); |
| 119 | |
| 120 | if ($args === []) { |
| 121 | return ''; |
| 122 | } |
| 123 | |
| 124 | return http_build_query($args, '', '&', PHP_QUERY_RFC3986); |
| 125 | } |
| 126 | |
| 127 | /** |
| 128 | * @param array<array-key, mixed> $args |
| 129 | * @return array<array-key, mixed> |
| 130 | */ |
| 131 | private function queryArgs(array $args): array |
| 132 | { |
| 133 | $query = []; |
| 134 | |
| 135 | foreach ($args as $key => $value) { |
| 136 | $value = $this->queryValue($value); |
| 137 | |
| 138 | if ($value !== null) { |
| 139 | $query[$key] = $value; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | if (!array_is_list($query)) { |
| 144 | ksort($query, SORT_STRING); |
| 145 | } |
| 146 | |
| 147 | return $query; |
| 148 | } |
| 149 | |
| 150 | /** @return scalar|array<array-key, mixed>|null */ |
| 151 | private function queryValue(mixed $value): mixed |
| 152 | { |
| 153 | if (is_scalar($value)) { |
| 154 | return $value; |
| 155 | } |
| 156 | |
| 157 | if (is_array($value)) { |
| 158 | return $this->queryArgs($value); |
| 159 | } |
| 160 | |
| 161 | return null; |
| 162 | } |
| 163 | |
| 164 | private function request(string $url, int $timeout, string $userAgent): ?string |
| 165 | { |
| 166 | $handle = curl_init($url); |
| 167 | |
| 168 | if ($handle === false) { |
| 169 | return null; |
| 170 | } |
| 171 | |
| 172 | $options = [ |
| 173 | CURLOPT_RETURNTRANSFER => true, |
| 174 | CURLOPT_CONNECTTIMEOUT => $timeout, |
| 175 | CURLOPT_TIMEOUT => $timeout, |
| 176 | CURLOPT_FOLLOWLOCATION => true, |
| 177 | CURLOPT_HTTPHEADER => ['Accept: image/svg+xml,text/plain;q=0.9,*/*;q=0.1'], |
| 178 | ]; |
| 179 | |
| 180 | if ($userAgent !== '') { |
| 181 | $options[CURLOPT_USERAGENT] = $userAgent; |
| 182 | } |
| 183 | |
| 184 | curl_setopt_array($handle, $options); |
| 185 | $body = curl_exec($handle); |
| 186 | $status = (int) curl_getinfo($handle, CURLINFO_RESPONSE_CODE); |
| 187 | $error = curl_errno($handle); |
| 188 | |
| 189 | if (!is_string($body) || $error !== 0 || $status < 200 || $status >= 300) { |
| 190 | return null; |
| 191 | } |
| 192 | |
| 193 | return $body; |
| 194 | } |
| 195 | |
| 196 | /** @param array<array-key, mixed> $args */ |
| 197 | private function cacheFile(string $id, array $args): ?string |
| 198 | { |
| 199 | $dir = $this->cacheDir(); |
| 200 | |
| 201 | if ($dir === null) { |
| 202 | return null; |
| 203 | } |
| 204 | |
| 205 | $query = $this->query($args); |
| 206 | $cacheId = $query === '' ? $id : $id . '?' . $query; |
| 207 | |
| 208 | return $dir . DIRECTORY_SEPARATOR . hash('xxh3', $cacheId) . '.svg'; |
| 209 | } |
| 210 | |
| 211 | private function cacheDir(): ?string |
| 212 | { |
| 213 | $publicDir = realpath($this->config->path->public); |
| 214 | |
| 215 | if ($publicDir === false) { |
| 216 | return null; |
| 217 | } |
| 218 | |
| 219 | $cacheDir = $this->config->path->cache; |
| 220 | |
| 221 | if ($cacheDir === '' || str_contains(str_replace('\\', '/', $cacheDir), '..')) { |
| 222 | return null; |
| 223 | } |
| 224 | |
| 225 | $target = |
| 226 | rtrim($publicDir, '\\/') |
| 227 | . DIRECTORY_SEPARATOR |
| 228 | . ltrim($cacheDir, '\\/') |
| 229 | . DIRECTORY_SEPARATOR |
| 230 | . 'icons'; |
| 231 | |
| 232 | try { |
| 233 | Path::ensureDirectory($target); |
| 234 | } catch (RuntimeException) { |
| 235 | return null; |
| 236 | } |
| 237 | |
| 238 | return $target; |
| 239 | } |
| 240 | |
| 241 | private function store(string $file, string $svg): void |
| 242 | { |
| 243 | $temp = $file . '.tmp.' . bin2hex(random_bytes(6)); |
| 244 | |
| 245 | if (file_put_contents($temp, $svg, LOCK_EX) === false) { |
| 246 | unlink($temp); |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | if (!rename($temp, $file)) { |
| 251 | if (is_file($temp)) { |
| 252 | unlink($temp); |
| 253 | } |
| 254 | } |
| 255 | } |
| 256 | } |