1 files changed, 98 insertions, 0 deletions
diff --git a/src/utils/DiffUtil.js b/src/utils/DiffUtil.js
new file mode 100644
index 0000000..5e69162
--- /dev/null
+++ b/src/utils/DiffUtil.js
@@ -0,0 +1,98 @@
+/*
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017-2021 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+
+var deepDiffMapper = function() {
+    return {
+        VALUE_CREATED: 'created',
+        VALUE_UPDATED: 'updated',
+        VALUE_DELETED: 'deleted',
+        VALUE_UNCHANGED: 'unchanged',
+        map: function(obj1, obj2) {
+            if (this.isFunction(obj1) || this.isFunction(obj2)) {
+                throw 'Invalid argument. Function given, object expected.';
+            }
+            if (this.isValue(obj1) || this.isValue(obj2)) {
+                return {
+                    type: this.compareValues(obj1, obj2),
+                    data: (obj1 === undefined) ? obj2 : obj1
+                };
+            }
+
+            var diff = {};
+            for (var key in obj1) {
+                if (this.isFunction(obj1[key])) {
+                    continue;
+                }
+
+                var value2 = undefined;
+                if ('undefined' != typeof(obj2[key])) {
+                    value2 = obj2[key];
+                }
+
+                diff[key] = this.map(obj1[key], value2);
+            }
+            for (var key in obj2) {
+                if (this.isFunction(obj2[key]) || ('undefined' != typeof(diff[key]))) {
+                    continue;
+                }
+
+                diff[key] = this.map(undefined, obj2[key]);
+            }
+
+            return diff;
+
+        },
+        compareValues: function(value1, value2) {
+            if (value1 === value2) {
+                return this.VALUE_UNCHANGED;
+            }
+            if (this.isDate(value1) && this.isDate(value2) && value1.getTime() === value2.getTime()) {
+            		return this.VALUE_UNCHANGED;
+            }
+            if ('undefined' == typeof(value1)) {
+                return this.VALUE_CREATED;
+            }
+            if ('undefined' == typeof(value2)) {
+                return this.VALUE_DELETED;
+            }
+
+            return this.VALUE_UPDATED;
+        },
+        isFunction: function(obj) {
+            return {}.toString.apply(obj) === '[object Function]';
+        },
+        isArray: function(obj) {
+            return {}.toString.apply(obj) === '[object Array]';
+        },
+        isObject: function(obj) {
+            return {}.toString.apply(obj) === '[object Object]';
+        },
+        isDate: function(obj) {
+            return {}.toString.apply(obj) === '[object Date]';
+        },
+        isValue: function(obj) {
+            return !this.isObject(obj) && !this.isArray(obj);
+        }
+    }
+}();
+
+
+export default deepDiffMapper;