feat: implement plugginable architecture

Refs #20

apidom/packages/apidom-parser-adapter-openapi3/package.json

@@ -13,6 +13,7 @@
     "apidom-ns-openapi3": "^0.1.0",
     "json-ast": "^2.1.7",
     "ramda": "^0.27.0",
-    "ramda-adjunct": "^2.26.0"
+    "ramda-adjunct": "^2.26.0",
+    "stampit": "^4.3.1"
   }
 }

apidom/packages/apidom-parser-adapter-openapi3/src/parser/index.js

@@ -3,15 +3,15 @@
 const apiDOM = require('apidom');
 const openapi3 = require('apidom-ns-openapi3');
 const jsonAst = require('json-ast');
-const DocumentVisitor = require('./visitors/document');
+const { specification } = require('./specification');
 const { visit } = require('./visitor');
 
-const parse = (source, { sourceMap = false } = {}) => {
+const parse = (source, { sourceMap = false, specObj = specification } = {}) => {
   const namespace = apiDOM.createNamespace(openapi3);
   const ast = jsonAst.parse(source, { verbose: true, junker: true });
-  const documentVisitor = DocumentVisitor();
+  const documentVisitor = specObj.visitors.document.$visitor();
 
-  visit(ast, documentVisitor, { state: { namespace, sourceMap }});
+  visit(ast, documentVisitor, { state: { namespace, specObj, sourceMap }});
 
   return documentVisitor.element;
 };