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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Richtext; |
| 6 | |
| 7 | use function Cosray\escape; |
| 8 | |
| 9 | /** |
| 10 | * Renders a richtext document to HTML. Reader-tolerant: unknown node |
| 11 | * or mark types and dangling references degrade instead of crashing; |
| 12 | * `notices()` reports what was skipped. |
| 13 | */ |
| 14 | final class Renderer |
| 15 | { |
| 16 | /** @var list<string> */ |
| 17 | private array $notices = []; |
| 18 | |
| 19 | public function __construct( |
| 20 | private readonly Resolver $resolver, |
| 21 | private readonly string $imageSize = 'block', |
| 22 | private readonly string $linkRel = 'noopener noreferrer nofollow', |
| 23 | ) {} |
| 24 | |
| 25 | public function render(mixed $doc): string |
| 26 | { |
| 27 | $this->notices = []; |
| 28 | |
| 29 | if (!is_array($doc) || ($doc['type'] ?? null) !== 'doc') { |
| 30 | return ''; |
| 31 | } |
| 32 | |
| 33 | return $this->children($doc['content'] ?? null); |
| 34 | } |
| 35 | |
| 36 | /** @return list<string> What the last render skipped or could not resolve. */ |
| 37 | public function notices(): array |
| 38 | { |
| 39 | return $this->notices; |
| 40 | } |
| 41 | |
| 42 | private function children(mixed $content): string |
| 43 | { |
| 44 | if (!is_array($content)) { |
| 45 | return ''; |
| 46 | } |
| 47 | |
| 48 | $html = ''; |
| 49 | |
| 50 | foreach ($content as $child) { |
| 51 | if (is_array($child)) { |
| 52 | $html .= $this->node($child); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | return $html; |
| 57 | } |
| 58 | |
| 59 | private function node(array $node): string |
| 60 | { |
| 61 | $type = $node['type'] ?? null; |
| 62 | |
| 63 | if (!is_string($type)) { |
| 64 | return ''; |
| 65 | } |
| 66 | |
| 67 | return match ($type) { |
| 68 | 'paragraph' => $this->tag( |
| 69 | 'p', |
| 70 | $this->blockAttrs($node), |
| 71 | $this->children($node['content'] ?? null), |
| 72 | ), |
| 73 | 'heading' => $this->heading($node), |
| 74 | 'bulletList' => $this->tag('ul', [], $this->children($node['content'] ?? null)), |
| 75 | 'orderedList' => $this->orderedList($node), |
| 76 | 'listItem' => $this->tag('li', [], $this->children($node['content'] ?? null)), |
| 77 | 'blockquote' => $this->tag('blockquote', [], $this->children($node['content'] ?? null)), |
| 78 | 'codeBlock' => '<pre><code>' . $this->children($node['content'] ?? null) . '</code></pre>', |
| 79 | 'horizontalRule' => $this->horizontalRule($node), |
| 80 | 'hardBreak' => '<br>', |
| 81 | 'text' => $this->text($node), |
| 82 | 'image' => $this->image($node), |
| 83 | default => $this->skip("unknown node type '{$type}'"), |
| 84 | }; |
| 85 | } |
| 86 | |
| 87 | private function heading(array $node): string |
| 88 | { |
| 89 | $level = $node['attrs']['level'] ?? 1; |
| 90 | $level = is_int($level) && $level >= 1 && $level <= 6 ? $level : 1; |
| 91 | |
| 92 | return $this->tag( |
| 93 | "h{$level}", |
| 94 | $this->alignAttrs($node), |
| 95 | $this->children($node['content'] ?? null), |
| 96 | ); |
| 97 | } |
| 98 | |
| 99 | private function orderedList(array $node): string |
| 100 | { |
| 101 | $start = $node['attrs']['start'] ?? 1; |
| 102 | $attrs = is_int($start) && $start !== 1 ? ['start' => (string) $start] : []; |
| 103 | |
| 104 | return $this->tag('ol', $attrs, $this->children($node['content'] ?? null)); |
| 105 | } |
| 106 | |
| 107 | private function horizontalRule(array $node): string |
| 108 | { |
| 109 | $class = $node['attrs']['class'] ?? null; |
| 110 | |
| 111 | return is_string($class) && $class !== '' |
| 112 | ? '<hr' . $this->attrString(['class' => $class]) . '>' |
| 113 | : '<hr>'; |
| 114 | } |
| 115 | |
| 116 | /** @return array<string, string> */ |
| 117 | private function blockAttrs(array $node): array |
| 118 | { |
| 119 | $attrs = []; |
| 120 | $class = $node['attrs']['class'] ?? null; |
| 121 | |
| 122 | if (is_string($class) && $class !== '' && $class !== 'default') { |
| 123 | $attrs['class'] = $class; |
| 124 | } |
| 125 | |
| 126 | return array_merge($attrs, $this->alignAttrs($node)); |
| 127 | } |
| 128 | |
| 129 | /** @return array<string, string> */ |
| 130 | private function alignAttrs(array $node): array |
| 131 | { |
| 132 | $align = $node['attrs']['align'] ?? null; |
| 133 | |
| 134 | if (is_string($align) && in_array($align, Spec::ALIGNMENTS, true)) { |
| 135 | return ['style' => "text-align: {$align}"]; |
| 136 | } |
| 137 | |
| 138 | return []; |
| 139 | } |
| 140 | |
| 141 | private function text(array $node): string |
| 142 | { |
| 143 | $text = $node['text'] ?? null; |
| 144 | |
| 145 | if (!is_string($text) || $text === '') { |
| 146 | return ''; |
| 147 | } |
| 148 | |
| 149 | $html = escape($text); |
| 150 | $marks = []; |
| 151 | |
| 152 | foreach (is_array($node['marks'] ?? null) ? $node['marks'] : [] as $mark) { |
| 153 | if (is_array($mark) && is_string($mark['type'] ?? null)) { |
| 154 | $marks[$mark['type']] = $mark; |
| 155 | } |
| 156 | } |
| 157 | |
| 158 | foreach (array_reverse(Spec::MARK_ORDER) as $type) { |
| 159 | if (isset($marks[$type])) { |
| 160 | $html = $this->mark($marks[$type], $html); |
| 161 | unset($marks[$type]); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | foreach (array_keys($marks) as $unknown) { |
| 166 | $this->skip("unknown mark type '{$unknown}'"); |
| 167 | } |
| 168 | |
| 169 | return $html; |
| 170 | } |
| 171 | |
| 172 | private function mark(array $mark, string $inner): string |
| 173 | { |
| 174 | return match ($mark['type']) { |
| 175 | 'bold' => "<strong>{$inner}</strong>", |
| 176 | 'italic' => "<em>{$inner}</em>", |
| 177 | 'underline' => "<u>{$inner}</u>", |
| 178 | 'strike' => "<s>{$inner}</s>", |
| 179 | 'code' => "<code>{$inner}</code>", |
| 180 | 'subscript' => "<sub>{$inner}</sub>", |
| 181 | 'superscript' => "<sup>{$inner}</sup>", |
| 182 | 'style' => $this->styleMark($mark, $inner), |
| 183 | 'link' => $this->link($mark, $inner), |
| 184 | default => $inner, |
| 185 | }; |
| 186 | } |
| 187 | |
| 188 | private function styleMark(array $mark, string $inner): string |
| 189 | { |
| 190 | $class = $mark['attrs']['class'] ?? null; |
| 191 | |
| 192 | if (!is_string($class) || $class === '') { |
| 193 | return $inner; |
| 194 | } |
| 195 | |
| 196 | return '<span' . $this->attrString(['class' => $class]) . ">{$inner}</span>"; |
| 197 | } |
| 198 | |
| 199 | private function link(array $mark, string $inner): string |
| 200 | { |
| 201 | $attrs = is_array($mark['attrs'] ?? null) ? $mark['attrs'] : []; |
| 202 | $href = null; |
| 203 | $rel = null; |
| 204 | |
| 205 | if (is_string($attrs['href'] ?? null) && $attrs['href'] !== '') { |
| 206 | $href = $attrs['href']; |
| 207 | $rel = $this->linkRel; |
| 208 | } elseif (is_string($attrs['node'] ?? null) && $attrs['node'] !== '') { |
| 209 | $href = $this->resolver->nodePath($attrs['node']); |
| 210 | |
| 211 | if ($href === null) { |
| 212 | return $this->skip("unresolvable node link '{$attrs['node']}'") . $inner; |
| 213 | } |
| 214 | } elseif (is_string($attrs['asset'] ?? null) && $attrs['asset'] !== '') { |
| 215 | $asset = $this->resolver->asset($attrs['asset']); |
| 216 | |
| 217 | if ($asset === null) { |
| 218 | return $this->skip("unresolvable asset link '{$attrs['asset']}'") . $inner; |
| 219 | } |
| 220 | |
| 221 | $href = $asset->path(); |
| 222 | } else { |
| 223 | return $inner; |
| 224 | } |
| 225 | |
| 226 | $html = ['href' => $href]; |
| 227 | |
| 228 | if (is_string($attrs['target'] ?? null) && $attrs['target'] !== '') { |
| 229 | $html['target'] = $attrs['target']; |
| 230 | } |
| 231 | |
| 232 | if (is_string($attrs['class'] ?? null) && $attrs['class'] !== '') { |
| 233 | $html['class'] = $attrs['class']; |
| 234 | } |
| 235 | |
| 236 | if ($rel !== null) { |
| 237 | $html['rel'] = $rel; |
| 238 | } |
| 239 | |
| 240 | return '<a' . $this->attrString($html) . ">{$inner}</a>"; |
| 241 | } |
| 242 | |
| 243 | private function image(array $node): string |
| 244 | { |
| 245 | $uid = $node['attrs']['uid'] ?? null; |
| 246 | |
| 247 | if (!is_string($uid) || $uid === '') { |
| 248 | return ''; |
| 249 | } |
| 250 | |
| 251 | $asset = $this->resolver->asset($uid); |
| 252 | |
| 253 | if ($asset === null) { |
| 254 | return $this->skip("unresolvable image '{$uid}'"); |
| 255 | } |
| 256 | |
| 257 | $src = $asset->resizable() ? $asset->sizePath($this->imageSize) : $asset->path(); |
| 258 | $meta = is_array($node['attrs']['meta'] ?? null) ? $node['attrs']['meta'] : []; |
| 259 | $alt = $meta['alt'] ?? null; |
| 260 | $title = $meta['title'] ?? null; |
| 261 | |
| 262 | if (!is_string($alt) || $alt === '') { |
| 263 | $catalog = $asset->metaMap('alt'); |
| 264 | $alt = $catalog === null ? null : $this->resolver->localize($catalog); |
| 265 | } |
| 266 | |
| 267 | $attrs = [ |
| 268 | 'src' => $src, |
| 269 | 'alt' => is_string($alt) ? $alt : '', |
| 270 | ]; |
| 271 | |
| 272 | if (is_string($title) && $title !== '') { |
| 273 | $attrs['title'] = $title; |
| 274 | } |
| 275 | |
| 276 | return '<img' . $this->attrString($attrs) . '>'; |
| 277 | } |
| 278 | |
| 279 | /** @param array<string, string> $attrs */ |
| 280 | private function tag(string $name, array $attrs, string $inner): string |
| 281 | { |
| 282 | return "<{$name}" . $this->attrString($attrs) . ">{$inner}</{$name}>"; |
| 283 | } |
| 284 | |
| 285 | /** @param array<string, string> $attrs */ |
| 286 | private function attrString(array $attrs): string |
| 287 | { |
| 288 | $html = ''; |
| 289 | |
| 290 | foreach ($attrs as $key => $value) { |
| 291 | $html .= ' ' . $key . '="' . escape($value) . '"'; |
| 292 | } |
| 293 | |
| 294 | return $html; |
| 295 | } |
| 296 | |
| 297 | private function skip(string $notice): string |
| 298 | { |
| 299 | $this->notices[] = $notice; |
| 300 | |
| 301 | return ''; |
| 302 | } |
| 303 | } |