add create API's for resources and results (#43)

* add create API's for resources and results
* add document api to overwrite all whole document
* add one test

src/resources.js

@@ -5,7 +5,9 @@ const _ = require('lodash');
 
 // application modules
 const Resource = require('./resource');
-const {QueryBase, Collection, notImplemented} = require('./utils');
+const {
+  QueryBase, Collection, Document, notImplemented
+} = require('./utils');
 
 /**
  * @class ResourcesQuery
@@ -151,6 +153,15 @@ class Resources extends Collection {
   update() {
     return this._notImplemented();
   }
+
+  /**
+   * Create new Resource
+   * @return {Resource} returns new result
+   */
+  create() {
+    const NewResource = Document.IsNewDocument(Resource);
+    return new NewResource(this._transport);
+  }
 }
 
 module.exports = Resources;

src/results.js

@@ -151,10 +151,13 @@ class Results extends Collection {
     return this._notImplemented('results update is not implemented');
   }
 
+  /**
+   * Create new Result
+   * @return {Result} returns new result
+   */
   create() {
     const NewResult = Document.IsNewDocument(Result);
-    const doc = new NewResult(this._transport);
-    return doc;
+    return new NewResult(this._transport);
   }
 }
 

src/utils/rest/document.js

@@ -128,6 +128,22 @@ class Document extends Base {
     }
     return this.set(key, value);
   }
+  /**
+   * Overwrite document with new allowedValue
+   * @param {Object} values - new data
+   * @return {Document} document object
+   */
+  overwrite(values) {
+    if (_.isEqual(this._resource, values)) {
+      return this;
+    }
+    if (this.isNew) {
+      this._resource = values;
+    } else {
+      this._changes = values;
+    }
+    return this;
+  }
   /**
    * getter for Document version
    * @return {number} returns document version number

test/api/resource.js

@@ -1,7 +1,7 @@
 const assert = require('assert');
 const moxios = require('moxios');
 
-const {Transport, Resource} = require('../../src');
+const {Transport, Resource, Resources} = require('../../src');
 
 describe('Resource', function () {
   let transport;
@@ -15,6 +15,16 @@ describe('Resource', function () {
     // import and pass your custom axios instance to this method
     moxios.uninstall();
   });
+  it('create new resource', function () {
+    const resourceJson = {_id: '123', name: 'X', __v: 0};
+    const resources = new Resources(transport);
+    const res = resources.create();
+    assert.equal(res.isNew, true);
+    res.overwrite(resourceJson);
+    assert.equal(res.name(), 'X');
+    assert.equal(res.id, '123');
+    assert.equal(res.isDirty(), true);
+  });
   it('constructing with valid json', function () {
     const resourceJson = {_id: '123', name: 'X', __v: 0};
     const res = new Resource(transport, resourceJson);