swagger-cli validateがvalidとなるapi.jsonを作れるようにする

packages/backend/generate_api_json.js

@@ -0,0 +1,8 @@
+import { loadConfig } from './built/config.js'
+import { genOpenapiSpec } from './built/server/api/openapi/gen-spec.js'
+import { writeFileSync } from "node:fs";
+
+const config = loadConfig();
+const spec = genOpenapiSpec(config);
+
+writeFileSync('./built/api.json', JSON.stringify(spec), 'utf-8');

packages/backend/package.json

@@ -23,7 +23,8 @@
 		"jest-and-coverage": "cross-env NODE_ENV=test node --experimental-vm-modules --experimental-import-meta-resolve node_modules/jest/bin/jest.js --coverage --forceExit",
 		"jest-clear": "cross-env NODE_ENV=test node --experimental-vm-modules --experimental-import-meta-resolve node_modules/jest/bin/jest.js --clearCache",
 		"test": "pnpm jest",
-		"test-and-coverage": "pnpm jest-and-coverage"
+		"test-and-coverage": "pnpm jest-and-coverage",
+		"generate-api-json": "node ./generate_api_json.js"
 	},
 	"optionalDependencies": {
 		"@swc/core-android-arm64": "1.3.11",

packages/backend/src/server/api/endpoints/federation/show-instance.ts

@@ -16,12 +16,9 @@ export const meta = {
 	requireCredential: false,
 
 	res: {
-		oneOf: [{
-			type: 'object',
-			ref: 'FederationInstance',
-		}, {
-			type: 'null',
-		}],
+		type: 'object',
+		optional: false, nullable: true,
+		ref: 'FederationInstance',
 	},
 } as const;
 

packages/backend/src/server/api/openapi/gen-spec.ts

@@ -4,7 +4,7 @@
  */
 
 import type { Config } from '@/config.js';
-import endpoints from '../endpoints.js';
+import endpoints, { IEndpoint } from '../endpoints.js';
 import { errors as basicErrors } from './errors.js';
 import { schemas, convertSchemaToOpenApiSchema } from './schemas.js';
 
@@ -31,18 +31,12 @@ export function genOpenapiSpec(config: Config) {
 
 		components: {
 			schemas: schemas,
-
-			securitySchemes: {
-				ApiKeyAuth: {
-					type: 'apiKey',
-					in: 'body',
-					name: 'i',
-				},
-			},
 		},
 	};
 
-	for (const endpoint of endpoints.filter(ep => !ep.meta.secure)) {
+	// 書き換えたりするのでディープコピーしておく。そのまま編集するとメモリ上の値が汚れて次回以降の出力に影響する
+	const copiedEndpoints = JSON.parse(JSON.stringify(endpoints)) as IEndpoint[];
+	for (const endpoint of copiedEndpoints.filter(ep => !ep.meta.secure)) {
 		const errors = {} as any;
 
 		if (endpoint.meta.errors) {
@@ -67,6 +61,21 @@ export function genOpenapiSpec(config: Config) {
 		const requestType = endpoint.meta.requireFile ? 'multipart/form-data' : 'application/json';
 		const schema = { ...endpoint.params };
 
+		if (endpoint.meta.requireCredential) {
+			// https://swagger.io/docs/specification/authentication/api-keys/
+			// ↑曰く、「can be "header", "query" or "cookie"」とのこと。
+			// Misskeyはbodyに埋め込む形にしているので、各エンドポイントのパラメータに直接APIキー用のフィールドを追加する必要がある
+			schema.properties = {
+				'i': {
+					type: 'string',
+					nullable: false,
+					description: 'API Key',
+				},
+				...schema.properties,
+			};
+			schema.required = ['i', ...schema.required ?? []];
+		}
+
 		if (endpoint.meta.requireFile) {
 			schema.properties = {
 				...schema.properties,
@@ -79,6 +88,11 @@ export function genOpenapiSpec(config: Config) {
 			schema.required = [...schema.required ?? [], 'file'];
 		}
 
+		if (schema.required && schema.required.length <= 0) {
+			// 空配列は許可されない
+			schema.required = undefined;
+		}
+
 		const info = {
 			operationId: endpoint.name,
 			summary: endpoint.name,
@@ -90,11 +104,6 @@ export function genOpenapiSpec(config: Config) {
 			...(endpoint.meta.tags ? {
 				tags: [endpoint.meta.tags[0]],
 			} : {}),
-			...(endpoint.meta.requireCredential ? {
-				security: [{
-					ApiKeyAuth: [],
-				}],
-			} : {}),
 			requestBody: {
 				required: true,
 				content: {
@@ -118,6 +127,11 @@ export function genOpenapiSpec(config: Config) {
 						description: 'OK (without any results)',
 					},
 				}),
+				...(endpoint.meta.res?.optional === true || endpoint.meta.res?.nullable === true ? {
+					'204': {
+						description: 'OK (without any results)',
+					},
+				} : {}),
 				'400': {
 					description: 'Client error',
 					content: {

packages/backend/src/server/api/openapi/schemas.ts

@@ -7,10 +7,16 @@ import type { Schema } from '@/misc/json-schema.js';
 import { refs } from '@/misc/json-schema.js';
 
 export function convertSchemaToOpenApiSchema(schema: Schema) {
-	const res: any = schema;
+	// optional, refはスキーマ定義に含まれないので分離しておく
+	// eslint-disable-next-line @typescript-eslint/no-unused-vars
+	const { optional, ref, ...res }: any = schema;
 
 	if (schema.type === 'object' && schema.properties) {
-		res.required = Object.entries(schema.properties).filter(([k, v]) => !v.optional).map(([k]) => k);
+		const required = Object.entries(schema.properties).filter(([k, v]) => !v.optional).map(([k]) => k);
+		if (required.length > 0) {
+			// 空配列は許可されない
+			res.required = required;
+		}
 
 		for (const k of Object.keys(schema.properties)) {
 			res.properties[k] = convertSchemaToOpenApiSchema(schema.properties[k]);