Markdown extraction

packages/documentator/src/Editor/Locations/Location.php

@@ -8,7 +8,7 @@
 use Traversable;
 
 /**
- * @implements IteratorAggregate<array-key, Coordinate>
+ * @implements IteratorAggregate<mixed, Coordinate>
  */
 readonly class Location implements IteratorAggregate {
     public function __construct(
@@ -23,7 +23,7 @@ public function __construct(
     }
 
     /**
-     * @return Traversable<array-key, Coordinate>
+     * @return Traversable<mixed, Coordinate>
      */
     #[Override]
     public function getIterator(): Traversable {

packages/documentator/src/Markdown/Contracts/Extraction.php

@@ -0,0 +1,13 @@
+<?php declare(strict_types = 1);
+
+namespace LastDragon_ru\LaraASP\Documentator\Markdown\Contracts;
+
+use LastDragon_ru\LaraASP\Documentator\Editor\Coordinate;
+use LastDragon_ru\LaraASP\Documentator\Markdown\Document;
+
+interface Extraction {
+    /**
+     * @return iterable<mixed, iterable<mixed, Coordinate>>
+     */
+    public function __invoke(Document $document): iterable;
+}

packages/documentator/src/Markdown/Contracts/Mutation.php

@@ -2,12 +2,12 @@
 
 namespace LastDragon_ru\LaraASP\Documentator\Markdown\Contracts;
 
-use LastDragon_ru\LaraASP\Documentator\Editor\Locations\Location;
+use LastDragon_ru\LaraASP\Documentator\Editor\Coordinate;
 use LastDragon_ru\LaraASP\Documentator\Markdown\Document;
 
 interface Mutation {
     /**
-     * @return iterable<array-key, array{Location, ?string}>
+     * @return iterable<mixed, array{iterable<mixed, Coordinate>, ?string}>
      */
     public function __invoke(Document $document): iterable;
 }

packages/documentator/src/Markdown/Data/Data.php

@@ -27,20 +27,25 @@ final public function __construct(
      * @return T
      */
     public static function get(Node $node): mixed {
-        $data  = $node->data->get(Package::Name.'.'.static::class, null);
-        $value = is_object($data) && is_a($data, static::class, true)
-            ? $data->value
-            : static::default($node);
+        // Cached?
+        $data = $node->data->get(Package::Name.'.'.static::class, null);
 
-        if ($data === null && $value !== null) {
-            static::set($node, $value);
+        if (is_object($data) && is_a($data, static::class, true)) {
+            return $data->value;
+        }
+
+        // Default?
+        $value = static::default($node);
+
+        if ($value === null && is_a(static::class, Nullable::class, true)) {
+            return static::set($node, $value);
         }
 
         if ($value === null) {
             throw new DataMissed($node, static::class);
         }
 
-        return $value;
+        return static::set($node, $value);
     }
 
     /**

packages/documentator/src/Markdown/Data/Nullable.php

@@ -0,0 +1,13 @@
+<?php declare(strict_types = 1);
+
+namespace LastDragon_ru\LaraASP\Documentator\Markdown\Data;
+
+/**
+ * @internal
+ * @template T
+ *
+ * @extends Data<T|null>
+ */
+abstract readonly class Nullable extends Data {
+    // empty
+}

packages/documentator/src/Markdown/Document.php

@@ -2,41 +2,28 @@
 
 namespace LastDragon_ru\LaraASP\Documentator\Markdown;
 
-use Closure;
 use LastDragon_ru\LaraASP\Core\Path\FilePath;
 use LastDragon_ru\LaraASP\Documentator\Editor\Coordinate;
 use LastDragon_ru\LaraASP\Documentator\Editor\Editor;
-use LastDragon_ru\LaraASP\Documentator\Editor\Locations\Location;
+use LastDragon_ru\LaraASP\Documentator\Markdown\Contracts\Extraction;
 use LastDragon_ru\LaraASP\Documentator\Markdown\Contracts\Markdown;
 use LastDragon_ru\LaraASP\Documentator\Markdown\Contracts\Mutation;
 use LastDragon_ru\LaraASP\Documentator\Markdown\Data\Lines;
-use League\CommonMark\Extension\CommonMark\Node\Block\Heading;
-use League\CommonMark\Extension\CommonMark\Node\Block\HtmlBlock;
-use League\CommonMark\Node\Block\AbstractBlock;
 use League\CommonMark\Node\Block\Document as DocumentNode;
-use League\CommonMark\Node\Block\Paragraph;
-use League\CommonMark\Node\Node;
 use Override;
 use Stringable;
 
 use function array_key_first;
-use function array_key_last;
 use function array_values;
 use function count;
 use function implode;
-use function is_int;
-use function mb_ltrim;
 use function mb_trim;
-use function str_ends_with;
-use function str_starts_with;
 
 // todo(documentator): There is no way to convert AST back to Markdown yet
 //      https://github.com/thephpleague/commonmark/issues/419
 
 class Document implements Stringable {
-    private ?Editor $editor  = null;
-    private ?string $title   = null;
-    private ?string $summary = null;
+    private ?Editor $editor = null;
 
     public function __construct(
         protected readonly Markdown $markdown,
@@ -50,63 +37,21 @@ public function isEmpty(): bool {
         return !$this->node->hasChildren() && count($this->node->getReferenceMap()) === 0;
     }
 
-    /**
-     * Returns the first `# Header` if present.
-     */
-    public function getTitle(): ?string {
-        if ($this->title === null) {
-            $title       = $this->getFirstNode(Heading::class, static fn ($n) => $n->getLevel() === 1);
-            $title       = $this->getBlockText($title) ?? '';
-            $title       = mb_trim(mb_ltrim("{$title}", '#'));
-            $this->title = $title;
-        }
-
-        return $this->title !== '' ? $this->title : null;
-    }
-
-    /**
-     * Returns the first paragraph if present.
-     */
-    public function getSummary(): ?string {
-        if ($this->summary === null) {
-            $summary       = $this->getSummaryNode();
-            $summary       = $this->getBlockText($summary);
-            $summary       = mb_trim("{$summary}");
-            $this->summary = $summary;
-        }
-
-        return $this->summary !== '' ? $this->summary : null;
-    }
-
-    /**
-     * Returns the rest of the document text after the summary.
-     */
-    public function getBody(): ?string {
-        $summary = $this->getSummaryNode();
-        $start   = $summary?->getEndLine();
-        $end     = array_key_last($this->getLines());
-        $body    = $start !== null && is_int($end)
-            ? $this->getText(new Location($start + 1, $end))
-            : null;
-        $body    = mb_trim((string) $body);
-        $body    = $body !== '' ? $body : null;
-
-        return $body;
-    }
-
     /**
      * @param iterable<array-key, Coordinate> $location
      */
     public function getText(iterable $location): string {
         return (string) $this->getEditor()->extract([$location]);
     }
 
-    public function mutate(Mutation ...$mutations): self {
+    public function mutate(Mutation|Extraction ...$mutations): self {
         $document = clone $this;
 
         foreach ($mutations as $mutation) {
-            $changes  = $mutation($document);
-            $content  = mb_trim((string) $document->getEditor()->mutate($changes))."\n";
+            $content  = $mutation instanceof Extraction
+                ? $document->getEditor()->extract($mutation($document))
+                : $document->getEditor()->mutate($mutation($document));
+            $content  = mb_trim((string) $content);
             $document = $this->markdown->parse($content, $document->path);
         }
 
@@ -130,71 +75,13 @@ protected function getEditor(): Editor {
         return $this->editor;
     }
 
-    /**
-     * @template T of Node
-     *
-     * @param class-string<T>          $class
-     * @param Closure(T): bool|null    $filter
-     * @param Closure(Node): bool|null $skip
-     *
-     * @return ?T
-     */
-    private function getFirstNode(string $class, ?Closure $filter = null, ?Closure $skip = null): ?Node {
-        $node = null;
-
-        foreach ($this->node->children() as $child) {
-            // Comment?
-            if (
-                $child instanceof HtmlBlock
-                && str_starts_with($child->getLiteral(), '<!--')
-                && str_ends_with($child->getLiteral(), '-->')
-            ) {
-                continue;
-            }
-
-            // Skipped?
-            if ($skip !== null && $skip($child)) {
-                continue;
-            }
-
-            // Wanted?
-            if ($child instanceof $class) {
-                if ($filter === null || $filter($child)) {
-                    $node = $child;
-                }
-
-                break;
-            }
-
-            // End
-            break;
-        }
-
-        return $node;
-    }
-
-    private function getBlockText(?AbstractBlock $node): ?string {
-        $startLine = $node?->getStartLine();
-        $endLine   = $node?->getEndLine();
-        $location  = $startLine !== null && $endLine !== null
-            ? new Location($startLine, $endLine)
-            : null;
-        $text      = $location !== null
-            ? $this->getText($location)
-            : null;
-
-        return $text;
-    }
-
-    private function getSummaryNode(): ?Paragraph {
-        $skip = static fn ($node) => $node instanceof Heading && $node->getLevel() === 1;
-        $node = $this->getFirstNode(Paragraph::class, skip: $skip);
-
-        return $node;
-    }
-
     #[Override]
     public function __toString(): string {
-        return implode("\n", $this->getLines())."\n";
+        $lines  = $this->getLines();
+        $string = $lines !== []
+            ? implode("\n", $this->getLines())."\n"
+            : '';
+
+        return $string;
     }
 }