Expose Validator class and validate function

index.js

@@ -1,12 +1,15 @@
 const {ROCrate} = require('./lib/rocrate.js');
 const {Checker} = require('./lib/checker.js');
 const {Utils} = require('./lib/utils.js');
+const {Validator, validate} = require('./lib/validator.js');
 const Defaults = require('./lib/defaults.js');
 
 module.exports = {
   ROCrate,
   Checker,
   Utils,
+  Validator,
+  validate,
   Defaults,
 };
 

lib/validator.js

@@ -74,18 +74,18 @@ class Validator {
 
     if (typeof json === 'object') {
       this.json = json;
-      return;
-    }
-    try {
-      this.json = JSON.parse(json);
-    } catch (error) {
-      this.results.push({
-        id: "validJson",
-        status: "error",
-        message: "Crate is not JSON: " + error,
-        clause: 'not a json'
-      });
-      return;
+    } else if (typeof json === 'string') {
+      try {
+        this.json = JSON.parse(json);
+      } catch (error) {
+        this.results.push({
+          id: "validJson",
+          status: "error",
+          message: "Crate is not JSON: " + error,
+          clause: 'not a json'
+        });
+        return;
+      }
     }
     var okSoFar = true;
     const graph = this.json['@graph'];
@@ -404,10 +404,28 @@ class Validator {
   }
 
   async validate() {
+    if (!this.crate) return false;
     await this.hasContext();
     this.rootDataEntity();
     return true;
   }
 }
 
-module.exports = {Validator};
+async function validate(crate, files) {
+  let validator;
+  // check if crate is an instance of ROCrate class
+  if (crate instanceof ROCrate) {
+    validator = new Validator(crate);
+  } else {
+    validator = new Validator();
+    validator.parseJSON(crate);
+  }
+
+  await validator.validate();
+  if (files) {
+    await validator.checkFiles(files);
+  }
+  return validator.results;
+}
+
+module.exports = { Validator, validate };

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ro-crate",
-  "version": "3.4.0",
+  "version": "3.4.1",
   "description": "Research Object Crate (RO-Crate) utilities for making and consuming crates",
   "main": "index.js",
   "scripts": {