remove dependency on openapi-schema-validator

package.json

@@ -1,14 +1,15 @@
 {
   "name": "express-openapi-validator",
-  "version": "1.3.0-rc.3",
+  "version": "1.3.0-rc.4",
   "description": "Automatically validate API requests using an OpenAPI 3 and Express.",
   "main": "dist/index.js",
   "scripts": {
     "compile": "rm -rf dist/ && tsc",
     "test": "mocha -r source-map-support/register -r ts-node/register --recursive test/**/*.spec.ts",
     "test:coverage": "nyc mocha -r source-map-support/register -r ts-node/register --recursive test/**/*.spec.ts",
     "coveralls": "cat coverage/lcov.info | coveralls -v",
-    "codacy": "cat coverage/lcov.info | codacy-coverage"
+    "codacy": "cat coverage/lcov.info | codacy-coverage",
+    "publish": "npm run compile && npm test && npm publish"
   },
   "repository": {
     "url": "https://github.com/cdimascio/express-openapi-validator"
@@ -27,9 +28,9 @@
     "ajv": "^6.10.2",
     "js-yaml": "^3.13.1",
     "lodash": "^4.17.15",
+    "lodash.merge": "^4.6.2",
     "multer": "^1.4.2",
     "ono": "^5.0.1",
-    "openapi-schema-validator": "^3.0.3",
     "openapi-types": "^1.3.5",
     "path-to-regexp": "^3.0.0",
     "ts-log": "^2.1.4"

src/framework/index.ts

@@ -1,5 +1,4 @@
-import OpenAPISchemaValidator from 'openapi-schema-validator';
-import { OpenAPIV2, OpenAPIV3 } from 'openapi-types';
+import OpenAPISchemaValidator from './openapi.schema.validator';
 import BasePath from './base.path';
 import {
   ConsoleDebugAdapterLogger,
@@ -44,58 +43,35 @@ export default class OpenAPIFramework implements IOpenAPIFramework {
     this.featureType = args.featureType;
     this.loggingPrefix = args.name ? `${this.name}: ` : '';
     this.logger = args.logger ? args.logger : new ConsoleDebugAdapterLogger();
-    // monkey patch for node v6:
-    if (!this.logger.debug) {
-      this.logger.debug = this.logger.info;
-    }
-
-    [
-      { name: 'apiDoc', required: true },
-      { name: 'errorTransformer', type: 'function' },
-      { name: 'externalSchemas', type: 'object' },
-      { name: 'featureType', required: true },
-      { name: 'name', required: true },
-    ].forEach(arg => {
-      if (arg.required && !(arg.name in args)) {
-        throw new Error(`${this.loggingPrefix}args.${arg.name} is required`);
-      }
-
-      if (arg.type && arg.name in args && typeof args[arg.name] !== arg.type) {
-        throw new Error(
-          `${this.loggingPrefix}args.${arg.name} must be a ${
-            arg.type
-          } when given`,
-        );
-      }
 
-    });
-
-    // this.enableObjectCoercion = !!args.enableObjectCoercion;
-    const apiDoc = (typeof args.apiDoc === 'string') 
-      ? handleYaml(loadSpecFile(args.apiDoc))
-      : args.apiDoc
+    const apiDoc =
+      typeof args.apiDoc === 'string'
+        ? handleYaml(loadSpecFile(args.apiDoc))
+        : args.apiDoc;
 
     this.originalApiDoc = apiDoc;
-    
+
     if (!this.originalApiDoc) {
       throw new Error(`spec could not be read at ${args.apiDoc}`);
     }
     this.apiDoc = copy(this.originalApiDoc);
+
     this.basePaths = this.apiDoc.openapi
       ? getBasePathsFromServers(this.apiDoc.servers)
       : [
           new BasePath({
             url: (this.apiDoc.basePath || '').replace(/\/$/, ''),
           }),
         ];
+
     this.validateApiDoc =
       'validateApiDoc' in args ? !!args.validateApiDoc : true;
+
     this.validator = new OpenAPISchemaValidator({
-      version:
-        (this.apiDoc as OpenAPIV3.Document).openapi ||
-        (this.apiDoc as OpenAPIV2.Document).swagger,
+      version: this.apiDoc.openapi,
       extensions: this.apiDoc[`x-${this.name}-schema-extension`],
     });
+
     if (this.validateApiDoc) {
       const apiDocValidation = this.validator.validate(this.apiDoc);
 
@@ -133,9 +109,7 @@ export default class OpenAPIFramework implements IOpenAPIFramework {
           JSON.stringify(apiDocValidation.errors, null, '  '),
         );
         throw new Error(
-          `${
-            this.loggingPrefix
-          }args.apiDoc was invalid after populating paths.  See the output.`,
+          `${this.loggingPrefix}args.apiDoc was invalid after populating paths.  See the output.`,
         );
       }
     }

src/framework/openapi.schema.validator.ts

@@ -0,0 +1,35 @@
+import * as Ajv from 'ajv';
+import * as merge from 'lodash.merge'
+const draftSchema = require('ajv/lib/refs/json-schema-draft-04.json');
+// https://github.com/OAI/OpenAPI-Specification/blob/master/schemas/v3.0/schema.json
+const openapi3Schema = require('./openapi.v3.schema.json');
+
+export default class OpenAPISchemaValidator{
+    private validator: Ajv.ValidateFunction;
+    constructor({
+        version,
+        extensions,
+    }) {
+      const v = new Ajv({ schemaId: 'auto', allErrors: true });
+      v.addMetaSchema(draftSchema);
+      const ver = (version && parseInt(String(version), 10));
+      if (!ver) throw Error('version missing from OpenAPI specification.');
+      if (ver != 3) throw Error('OpenAPI v3 specification version is required.')
+      const schema = merge(
+        {},
+        openapi3Schema,
+        extensions || {}
+      );
+      v.addSchema(schema);
+      this.validator = v.compile(schema);
+    }
+
+    public validate(openapiDoc) {
+      const valid = this.validator(openapiDoc);
+      if (!valid) {
+        return { errors: this.validator.errors };
+      } else {
+        return { errors: [] };
+      }
+    }
+  }