fix(grouper): handle out-of-type diff calculations

lib/utils.js

@@ -29,9 +29,33 @@ module.exports.deepMerge = deepMerge;
  * @returns {object}
  */
 function deepDiff(source, target) {
-  if (typeOf(target) === 'array') {
+  const sourceType = typeOf(source);
+  const targetType = typeOf(target);
+
+  /**
+   * If we'll compare NOTHING with SOMETHING, the diff will be SOMETHING
+   */
+  if (source === undefined) {
+    return target;
+  }
+
+  /**
+   * If we'll compare SOMETHING with NOTHING, the diff will be NOTHING
+   */
+  if (targetType === undefined) {
+    return undefined;
+  }
+
+  /**
+   * We CAN'T compare apples with dogs
+   */
+  if (sourceType !== targetType) {
+    return undefined;
+  }
+
+  if (targetType === 'array') {
     return arrayDiff(source, target);
-  } else if (typeOf(target) === 'object') {
+  } else if (targetType === 'object') {
     return objectDiff(source, target);
   } else if (source !== target) {
     return target;

lib/utils.test.js

@@ -117,6 +117,35 @@ describe('Utils', () => {
         files: [ { line: 1 }, { line: 2 }, { line: 3 } ],
       },
     },
+
+    /**
+     * The first - an empty array
+     * The second - array with the children non-empty array
+     */
+    {
+      sourceObject: {
+        prop: [],
+      },
+      targetObject: {
+        prop: [ [ 'i am not empty' ] ],
+      },
+      expectedDiff: {
+        prop: [ [ 'i am not empty' ] ],
+      },
+      expectedMerge: {
+        prop: [ [ 'i am not empty' ] ],
+      },
+    },
+
+    /**
+     * Trying to compare two things of different type
+     */
+    {
+      sourceObject: [],
+      targetObject: {},
+      expectedDiff: undefined,
+      expectedMerge: {},
+    },
   ];
 
   test('should return right object diff', () => {
@@ -135,4 +164,110 @@ describe('Utils', () => {
       expect(merge).toEqual(testCase.expectedMerge);
     });
   });
+
+  /**
+   * This test is a temporary solution to handle case with invalid events format sent by the PHP catcher
+   *
+   * The problem: the PHP catcher sends some data via incompatible format under invalid names and types.
+   * Those fields leads to the issues with diff calculation since fields could have different structure and types.
+   *
+   * The solution: deepDiff will return undefined in case of comparison of things with different types
+   *
+   * Original issue:
+   * https://github.com/codex-team/hawk.workers/issues/312
+   *
+   * PHP Catcher issue:
+   * https://github.com/codex-team/hawk.php/issues/39
+   */
+  test('should not throw error comparing events with incompatible format', () => {
+    const originalStackTrace = [
+      {
+        function: 'postAddComment',
+        class: 'Components\\Comments\\Comments',
+        object: {},
+        type: '->',
+        args: [
+          286131,
+          {},
+        ],
+      },
+    ];
+
+    const repetitionStackTrace = [
+      {
+        file: '/var/www/osnova/vendor/php-di/invoker/src/Invoker.php',
+        line: 74,
+        function: 'call_user_func_array',
+        args: [
+          [
+            {},
+            'sendWebhooksJob',
+          ],
+          [
+            [
+              {
+                id: 6697,
+                token: '539506',
+                event: 'new_comment',
+                url: 'https://callback.angry.space/vc_callback?date=2020&code=lMzBjOWZhOTM0ZDU1NTJiZjFlZmUy',
+                filter: '[]',
+                data: '[]',
+                removed: false,
+              },
+            ],
+            {
+              type: 'new_comment',
+              data: {
+                id: 3206086,
+                url: 'https://vc.ru/trade/286961-wildberries-zapustil-dostavku-tovarov-za-2-chasa-v-peterburge?comment=3206086',
+                text: 'Это только со стороны так вроде долго, а если смотреть изнутри, то пока там освободиться купьер, пока найдут товар   пока разберуться куда везти может и 4 часа пройти.',
+                media: [],
+                date: '2021-08-27T18:08:30+03:00',
+                creator: {
+                  id: 27823,
+                  avatar: 'https://leonardo.osnova.io/8ddee2e8-28e4-7863-425e-dd9b06deae5d/',
+                  name: 'Vitold S.',
+                  url: 'https://vc.ru/u/27823-vitold-s',
+                },
+                content: {
+                  id: 286961,
+                  title: 'Wildberries запустил доставку товаров за 2 часа в Петербурге',
+                  url: 'https://vc.ru/trade/286961-wildberries-zapustil-dostavku-tovarov-za-2-chasa-v-peterburge',
+                  owner: {
+                    id: 199122,
+                    name: 'Торговля',
+                    avatar: 'https://leonardo.osnova.io/d8fbb348-a8fd-641c-55dd-6a404055b457/',
+                    url: 'https://vc.ru/trade',
+                  },
+                },
+                replyTo: {
+                  id: 3205883,
+                  url: 'https://vc.ru/trade/286961-wildberries-zapustil-dostavku-tovarov-za-2-chasa-v-peterburge?comment=3205883',
+                  text: 'Никто не пошутил, тогда это сделаю я!\n\n- 2.. часа!!1',
+                  media: [],
+                  creator: {
+                    id: 877711,
+                    avatar: 'https://leonardo.osnova.io/476a4e2c-8045-5b77-8a37-f6b1eb58bf93/',
+                    name: 'Вадим Осадчий',
+                    url: 'https://vc.ru/u/877711-vadim-osadchiy',
+                  },
+                },
+              },
+            },
+          ],
+        ],
+      },
+    ];
+
+    const diff = utils.deepDiff(originalStackTrace, repetitionStackTrace);
+
+    expect(diff).toEqual([
+      {
+        file: '/var/www/osnova/vendor/php-di/invoker/src/Invoker.php',
+        line: 74,
+        function: 'call_user_func_array',
+        args: [undefined, undefined],
+      },
+    ]);
+  });
 });