Add PathFilter processor to filter paths (zircote#1613)

src/Annotations/PathItem.php

@@ -155,4 +155,21 @@ class PathItem extends AbstractAnnotation
     public static $_parents = [
         OpenApi::class,
     ];
+
+    /**
+     * Returns a list of all operations (all methods) for this path item.
+     *
+     * @return Operation[]
+     */
+    public function operations(): array
+    {
+        $operations = [];
+        foreach (PathItem::$_nested as $className => $property) {
+            if (is_subclass_of($className, Operation::class) && !Generator::isDefault($this->{$property})) {
+                $operations[] = $this->{$property};
+            }
+        }
+
+        return $operations;
+    }
 }

src/Generator.php

@@ -277,6 +277,8 @@ public function getProcessorPipeline(): Pipeline
                 new Processors\OperationId(),
                 new Processors\AugmentTags(),
                 new Processors\CleanUnmerged(),
+                new Processors\PathFilter(),
+                new Processors\CleanUnusedComponents(),
             ]);
         }
 

src/Processors/AugmentParameters.php

@@ -30,9 +30,11 @@ public function isAugmentOperationParameters(): bool
     /**
      * If set to <code>true</code> try to find operation parameter descriptions in the operation docblock.
      */
-    public function setAugmentOperationParameters(bool $augmentOperationParameters): void
+    public function setAugmentOperationParameters(bool $augmentOperationParameters): AugmentParameters
     {
         $this->augmentOperationParameters = $augmentOperationParameters;
+
+        return $this;
     }
 
     public function __invoke(Analysis $analysis)

src/Processors/CleanUnusedComponents.php

@@ -10,17 +10,42 @@
 use OpenApi\Annotations as OA;
 use OpenApi\Generator;
 
+/**
+ * Tracks the use of all <code>Components</code> and removed unused schemas.
+ */
 class CleanUnusedComponents implements ProcessorInterface
 {
-    use Concerns\CollectorTrait;
+    use Concerns\AnnotationTrait;
+
+    /**
+     * @var bool
+     */
+    protected $enabled = false;
+
+    public function __construct(bool $enabled = false)
+    {
+        $this->enabled = $enabled;
+    }
+
+    public function isEnabled(): bool
+    {
+        return $this->enabled;
+    }
+
+    public function setEnabled(bool $enabled): CleanUnusedComponents
+    {
+        $this->enabled = $enabled;
+
+        return $this;
+    }
 
     public function __invoke(Analysis $analysis)
     {
-        if (Generator::isDefault($analysis->openapi->components)) {
+        if (!$this->enabled || Generator::isDefault($analysis->openapi->components)) {
             return;
         }
 
-        $analysis->annotations = $this->collect($analysis->annotations);
+        $analysis->annotations = $this->collectAnnotations($analysis->annotations);
 
         // allow multiple runs to catch nested dependencies
         for ($ii = 0; $ii < 10; ++$ii) {
@@ -83,10 +108,12 @@ protected function cleanup(Analysis $analysis): bool
             foreach ($analysis->openapi->components->{$componentType} as $ii => $component) {
                 if ($component->{$nameProperty} == $name) {
                     $annotation = $analysis->openapi->components->{$componentType}[$ii];
-                    foreach ($this->collect([$annotation]) as $unused) {
-                        $analysis->annotations->detach($unused);
-                    }
+                    $this->removeAnnotation($analysis->annotations, $annotation);
                     unset($analysis->openapi->components->{$componentType}[$ii]);
+
+                    if (!$analysis->openapi->components->{$componentType}) {
+                        $analysis->openapi->components->{$componentType} = Generator::UNDEFINED;
+                    }
                 }
             }
         }

src/Processors/Concerns/AnnotationTrait.php

@@ -0,0 +1,67 @@
+<?php declare(strict_types=1);
+
+/**
+ * @license Apache 2.0
+ */
+
+namespace OpenApi\Processors\Concerns;
+
+use OpenApi\Annotations as OA;
+
+trait AnnotationTrait
+{
+    /**
+     * Collects a (complete) list of all nested/referenced annotations starting from the given root.
+     *
+     * @param string|array|iterable|OA\AbstractAnnotation $root
+     */
+    public function collectAnnotations($root): \SplObjectStorage
+    {
+        $storage = new \SplObjectStorage();
+
+        $this->traverseAnnotations($root, function ($item) use (&$storage) {
+            if ($item instanceof OA\AbstractAnnotation && !$storage->contains($item)) {
+                $storage->attach($item);
+            }
+        });
+
+        return $storage;
+    }
+
+    /**
+     * Remove all annotations that are part of the `$annotation` tree.
+     */
+    public function removeAnnotation(iterable $root, OA\AbstractAnnotation $annotation): void
+    {
+        $remove = $this->collectAnnotations($annotation);
+        $this->traverseAnnotations($root, function ($item) use ($remove) {
+            if ($item instanceof \SplObjectStorage) {
+                foreach ($remove as $annotation) {
+                    $item->detach($annotation);
+                }
+            }
+        });
+    }
+
+    /**
+     * @param string|array|iterable|OA\AbstractAnnotation $root
+     */
+    public function traverseAnnotations($root, callable $callable): void
+    {
+        $callable($root);
+
+        if (is_iterable($root)) {
+            foreach ($root as $value) {
+                $this->traverseAnnotations($value, $callable);
+            }
+        } elseif ($root instanceof OA\AbstractAnnotation) {
+            foreach (array_merge($root::$_nested, ['allOf', 'anyOf', 'oneOf', 'callbacks']) as $properties) {
+                foreach ((array) $properties as $property) {
+                    if (isset($root->{$property})) {
+                        $this->traverseAnnotations($root->{$property}, $callable);
+                    }
+                }
+            }
+        }
+    }
+}

src/Processors/PathFilter.php

@@ -0,0 +1,105 @@
+<?php declare(strict_types=1);
+
+/**
+ * @license Apache 2.0
+ */
+
+namespace OpenApi\Processors;
+
+use OpenApi\Analysis;
+use OpenApi\Generator;
+use OpenApi\Processors\Concerns\AnnotationTrait;
+
+/**
+ * Allows to filter endpoints based on tags and/or path.
+ *
+ * If no `tags` or `paths` filters are set, no filtering is performed.
+ * All filter (regular) expressions must be enclosed within delimiter characters as they are used as-is.
+ */
+class PathFilter implements ProcessorInterface
+{
+    use AnnotationTrait;
+
+    /** @var array */
+    protected $tags = [];
+
+    /** @var array */
+    protected $paths = [];
+
+    public function __construct(array $tags = [], array $paths = [])
+    {
+        $this->tags = $tags;
+        $this->paths = $paths;
+    }
+
+    public function getTags(): array
+    {
+        return $this->tags;
+    }
+
+    /**
+     * A list of regular expressions to match <code>tags</code> to include.
+     *
+     * @param array<string> $tags
+     */
+    public function setTags(array $tags): PathFilter
+    {
+        $this->tags = $tags;
+
+        return $this;
+    }
+
+    public function getPaths(): array
+    {
+        return $this->paths;
+    }
+
+    /**
+     * A list of regular expressions to match <code>paths</code> to include.
+     *
+     * @param array<string> $paths
+     */
+    public function setPaths(array $paths): PathFilter
+    {
+        $this->paths = $paths;
+
+        return $this;
+    }
+
+    public function __invoke(Analysis $analysis)
+    {
+        if (($this->tags || $this->paths) && !Generator::isDefault($analysis->openapi->paths)) {
+            $filtered = [];
+            foreach ($analysis->openapi->paths as $pathItem) {
+                $matched = null;
+                foreach ($this->tags as $pattern) {
+                    foreach ($pathItem->operations() as $operation) {
+                        if (!Generator::isDefault($operation->tags)) {
+                            foreach ($operation->tags as $tag) {
+                                if (preg_match($pattern, $tag)) {
+                                    $matched = $pathItem;
+                                    break 3;
+                                }
+                            }
+                        }
+                    }
+                }
+
+                foreach ($this->paths as $pattern) {
+                    if (preg_match($pattern, $pathItem->path)) {
+                        $matched = $pathItem;
+                        break;
+                    }
+                }
+
+                if ($matched) {
+                    $filtered[] = $matched;
+                } else {
+                    $this->removeAnnotation($analysis->annotations, $pathItem);
+                }
+            }
+
+            $analysis->openapi->paths = $filtered;
+        }
+    }
+}

tests/Processors/CleanUnusedComponentsTest.php

@@ -6,6 +6,7 @@
 
 namespace OpenApi\Tests\Processors;
 
+use OpenApi\Generator;
 use OpenApi\Processors\CleanUnusedComponents;
 use OpenApi\Tests\OpenApiTestCase;
 
@@ -17,9 +18,9 @@ public static function countCases(): iterable
 
         return [
             'var-default' => [$defaultProcessors, 'UsingVar.php', 2, 5],
-            'var-clean' => [array_merge($defaultProcessors, [new CleanUnusedComponents()]), 'UsingVar.php', 0, 2],
+            'var-clean' => [array_merge($defaultProcessors, [new CleanUnusedComponents(true)]), 'UsingVar.php', 0, 2],
             'unreferenced-default' => [$defaultProcessors, 'Unreferenced.php', 2, 11],
-            'unreferenced-clean' => [array_merge($defaultProcessors, [new CleanUnusedComponents()]), 'Unreferenced.php', 0, 5],
+            'unreferenced-clean' => [array_merge($defaultProcessors, [new CleanUnusedComponents(true)]), 'Unreferenced.php', 0, 5],
         ];
     }
 
@@ -30,7 +31,11 @@ public function testCounts(array $processors, string $fixture, int $expectedSche
     {
         $analysis = $this->analysisFromFixtures([$fixture], $processors);
 
-        $this->assertCount($expectedSchemaCount, $analysis->openapi->components->schemas);
+        if ($expectedSchemaCount === 0) {
+            $this->assertTrue(Generator::isDefault($analysis->openapi->components->schemas));
+        } else {
+            $this->assertCount($expectedSchemaCount, $analysis->openapi->components->schemas);
+        }
         $this->assertCount($expectedAnnotationCount, $analysis->annotations);
     }
 }