feat: add info, externalDocs, tags from source document to single operation specification

src/apitypes/rest/rest.operation.ts

@@ -47,6 +47,7 @@ import {
   takeIf,
   takeIfDefined,
 } from '../../utils'
+import { getUsedTags } from '../../utils/mergeOpenapiDocuments'
 import { API_KIND, INLINE_REFS_FLAG, ORIGINS_SYMBOL, VERSION_STATUS } from '../../consts'
 import { extractSecuritySchemesNames, getCustomTags, resolveApiAudience } from './rest.utils'
 import { DebugPerformanceContext, syncDebugPerformance } from '../../utils/logs'
@@ -328,6 +329,9 @@ const isOperationPaths = (paths: JsonPath[]): boolean => {
 // todo output of this method disrupts document normalization.
 //  origin symbols are not being transferred to the resulting spec.
 //  DO NOT pass output of this method to apiDiff
+// TODO: conceptually, this method does processing which is very similar
+// is very similar to the reducedSourceSpecifications transformation.
+// We should merge these two functions into one.
 export const createSingleOperationSpec = (
   document: OpenAPIV3.Document,
   path: string,
@@ -350,8 +354,12 @@ export const createSingleOperationSpec = (
     : undefined
 
   const isRefPathData = !!pathData.$ref
-  return {
+
+  // Construct the single operation document
+  const singleOperationDocument: TYPE.RestOperationData = {
     openapi: openapi ?? '3.0.0',
+    ...takeIfDefined({ info: document.info }),
+    ...takeIfDefined({ externalDocs: document.externalDocs }),
     ...takeIfDefined({ servers }),
     ...!operationSecurity ? takeIfDefined({ security }) : {},// Only add root security if operation security is not explicitly defined
     paths: {
@@ -367,8 +375,20 @@ export const createSingleOperationSpec = (
       components: effectiveSecuritySchemes ? { securitySchemes: effectiveSecuritySchemes } : undefined,
     }),
   }
-}
 
+  // Filter tags to only include those used by this operation
+  if (document.tags) {
+    const filteredTags = getUsedTags([{
+      ...singleOperationDocument,
+      tags: document.tags,
+    } as OpenAPIV3.Document])
+    if (filteredTags) {
+      singleOperationDocument.tags = filteredTags
+    }
+  }
+
+  return singleOperationDocument
+}
 export const extractCommonPathItemProperties = (
   pathData: OpenAPIV3.PathItemObject,
 ): Pick<OpenAPIV3.PathItemObject, 'summary' | 'description' | 'servers' | 'parameters'> => ({

src/apitypes/rest/rest.types.ts

@@ -47,10 +47,13 @@ export type VersionRestOperation = ApiOperation<RestOperationData, RestOperation
 
 export interface RestOperationData {
   openapi: string
+  info?: OpenAPIV3.InfoObject
   servers?: OpenAPIV3.ServerObject[]
   paths: OpenAPIV3.PathsObject
   components?: OpenAPIV3.ComponentsObject
   security?: OpenAPIV3.SecurityRequirementObject[]
+  externalDocs?: OpenAPIV3.ExternalDocumentationObject
+  tags?: OpenAPIV3.TagObject[]
 }
 
 export interface RestRefCache {

src/utils/mergeOpenapiDocuments.ts

@@ -56,7 +56,7 @@ export const mergeOpenapiDocuments = (documents: OpenAPIV3.Document[], info: Ope
     paths: merged.paths,
     components: merged.components,
     security: template?.security || merged.security,
-    ...takeIfDefined({ tags: getTags(documents) }),
+    ...takeIfDefined({ tags: getUsedTags(documents) }),
     ...takeIfDefined({ externalDocs: template?.externalDocs || getExternalDocs(merged, diffs) }),
   }
 }
@@ -112,9 +112,9 @@ function extractDeclarationPaths(diff: Diff): JsonPath[] {
 
 function compliesWithRules(rules: DiffRule[], diff: Diff): boolean {
   return rules.some(allowedDiff => {
-      const matchResult = matchPaths(extractDeclarationPaths(diff), allowedDiff.pathTemplate)
-      return matchResult?.path && allowedDiff.allowedActions.includes(diff.action)
-    },
+    const matchResult = matchPaths(extractDeclarationPaths(diff), allowedDiff.pathTemplate)
+    return matchResult?.path && allowedDiff.allowedActions.includes(diff.action)
+  },
   )
 }
 
@@ -128,12 +128,12 @@ const validateResult = (rules: DiffRule[], diffs: Diff[], title1: string, title2
 
   if (firstProhibitedDiff) {
     throw new Error(`Unable to merge ${trimPath(firstPathFromProhibitedDiff).join('.')}. These specifications have different content for it: ${title1}, ${title2}.
-       Please resolve the conflicts in source specification, republish them and try again. You can also download reduced source specifications and merge operations manually.`,
+      Please resolve the conflicts in source specification, republish them and try again. You can also download reduced source specifications and merge operations manually.`,
     )
   }
 }
 
-function getTags(specs: OpenAPIV3.Document[]): OpenAPIV3.TagObject[] | undefined {
+export function getUsedTags(specs: OpenAPIV3.Document[]): OpenAPIV3.TagObject[] | undefined {
   const tagsWithUsages = specs
     .map(({ tags, paths }) => {
       const specTags: string[] = []
@@ -198,10 +198,10 @@ function prepareTemplate(openapi: string, template?: ExportTemplate): ExportTemp
     info,
     ...takeIfDefined({ servers }),
     ...takeIf({
-        components: {
-          securitySchemes,
-        },
-      }, !!securitySchemes,
+      components: {
+        securitySchemes,
+      },
+    }, !!securitySchemes,
     ),
     ...takeIfDefined({ security }),
     ...takeIfDefined({ externalDocs }),

test/projects/rest.operation/info-externaldocs-no-tags/base.yaml

@@ -0,0 +1,15 @@
+openapi: 3.0.3
+info:
+  title: Info and ExternalDocs without Tags Test
+  version: 1.0.0
+  description: Test document for info and externalDocs when no tags are present
+externalDocs:
+  description: API Documentation
+  url: https://docs.example.com
+paths:
+  /test:
+    get:
+      summary: Test operation without tags
+      responses:
+        "200":
+          description: OK

test/projects/rest.operation/info-externaldocs-tags-filtering/base.yaml

@@ -0,0 +1,27 @@
+openapi: 3.0.3
+info:
+  title: Info, ExternalDocs, and Tags Filtering Test
+  version: 1.0.0
+  description: Test document for filtering info, externalDocs, and tags
+  contact:
+    name: API Support
+    email: [email protected]
+externalDocs:
+  description: API Documentation
+  url: https://docs.example.com
+tags:
+  - name: pet
+    description: Pet operations
+  - name: store
+    description: Store operations
+  - name: user
+    description: User operations
+paths:
+  /test:
+    get:
+      summary: Test operation
+      tags:
+        - pet
+      responses:
+        "200":
+          description: OK

test/rest.operation.test.ts

@@ -122,5 +122,46 @@ describe('REST Operation Unit Tests', () => {
         expect(result.security).toEqual(document.security)
       })
     })
+
+    describe('Info, ExternalDocs, and Tags Handling', () => {
+      test('should include info object from source document', async () => {
+        const document = await loadYamlFile('rest.operation/info-externaldocs-tags-filtering/base.yaml')
+
+        const result = createTestSingleOperationSpec(document)
+
+        expect(result.info).toBeDefined()
+        expect(result.info).toEqual(document.info)
+      })
+
+      test('should include externalDocs object from source document', async () => {
+        const document = await loadYamlFile('rest.operation/info-externaldocs-tags-filtering/base.yaml')
+
+        const result = createTestSingleOperationSpec(document)
+
+        expect(result.externalDocs).toBeDefined()
+        expect(result.externalDocs).toEqual(document.externalDocs)
+      })
+
+      test('should filter tags to only include those used by the operation', async () => {
+        const document = await loadYamlFile('rest.operation/info-externaldocs-tags-filtering/base.yaml')
+
+        const result = createTestSingleOperationSpec(document)
+
+        expect(result.tags).toEqual([
+          {
+            name: 'pet',
+            description: 'Pet operations',
+          },
+        ])
+      })
+
+      test('should handle document with no tags', async () => {
+        const document = await loadYamlFile('rest.operation/info-externaldocs-no-tags/base.yaml')
+
+        const result = createTestSingleOperationSpec(document)
+
+        expect(result.tags).toBeUndefined()
+      })
+    })
   })
 })