Refactor event factory, remove spark-md5 lib, fix hash collisions on messageId (#1045)

Co-authored-by: Andrew Loyola <andrewloyola@users.noreply.github.com>

Author: silesky

.changeset/clean-trains-perform.md

@@ -0,0 +1,8 @@
+---
+'@segment/analytics-next': minor
+---
+- Remove validation plugin
+- Remove `spark-md5` dependency
+- Update messageId algorithm to be consistent with node (analytics-next-[epoch time]-[uuid])
+- Browser Validation:
+  - Throws errors in the EventFactory (not just in a plugin) if the event is invalid

.changeset/nasty-bulldogs-unite.md

@@ -0,0 +1,4 @@
+---
+'@segment/analytics-core': patch
+---
+Share `EventFactory` between node and browser.

packages/browser/package.json

@@ -57,7 +57,6 @@
     "dset": "^3.1.2",
     "js-cookie": "3.0.1",
     "node-fetch": "^2.6.7",
-    "spark-md5": "^3.0.1",
     "tslib": "^2.4.1",
     "unfetch": "^4.1.0"
   },
@@ -76,7 +75,6 @@
     "@types/mime": "^2.0.3",
     "@types/node": "^16",
     "@types/serve-handler": "^6.1.0",
-    "@types/spark-md5": "^3.0.2",
     "aws-sdk": "^2.814.0",
     "circular-dependency-plugin": "^5.2.2",
     "compression-webpack-plugin": "^8.0.1",

packages/browser/src/browser/__tests__/inspector.integration.test.ts

@@ -55,7 +55,7 @@ describe('Inspector', () => {
 
     await deliveryPromise
 
-    expect(enrichedFn).toHaveBeenCalledTimes(2) // will be called once for every before or enrichment plugin.
+    expect(enrichedFn).toHaveBeenCalledTimes(1) // will be called once for every before or enrichment plugin.
     expect(deliveredFn).toHaveBeenCalledTimes(1)
   })
 

packages/browser/src/browser/__tests__/integration.test.ts

@@ -650,7 +650,6 @@ describe('Dispatch', () => {
         "plugin_time",
         "plugin_time",
         "plugin_time",
-        "plugin_time",
         "message_delivered",
         "delivered",
       ]

packages/browser/src/browser/index.ts

@@ -22,7 +22,6 @@ import {
 } from '../plugins/remote-loader'
 import type { RoutingRule } from '../plugins/routing-middleware'
 import { segmentio, SegmentioSettings } from '../plugins/segmentio'
-import { validation } from '../plugins/validation'
 import {
   AnalyticsBuffered,
   PreInitMethodCallBuffer,
@@ -255,7 +254,6 @@ async function registerPlugins(
   ).catch(() => [])
 
   const toRegister = [
-    validation,
     envEnrichment,
     ...plugins,
     ...legacyDestinations,

packages/browser/src/core/analytics/index.ts

@@ -582,7 +582,7 @@ export class Analytics
 
   normalize(msg: SegmentEvent): SegmentEvent {
     console.warn(deprecationWarning)
-    return this.eventFactory.normalize(msg)
+    return this.eventFactory['normalize'](msg)
   }
 
   get failedInitializations(): string[] {

packages/browser/src/core/events/__tests__/index.test.ts

@@ -3,7 +3,6 @@ import { range, uniq } from 'lodash'
 import { EventFactory } from '..'
 import { getDefaultPageContext } from '../../page'
 import { User } from '../../user'
-import { SegmentEvent, Options } from '../interfaces'
 
 describe('Event Factory', () => {
   let user: User
@@ -59,6 +58,25 @@ describe('Event Factory', () => {
       const group = factory.group('coolKidsId', { coolkids: true })
       expect(group.groupId).toEqual('coolKidsId')
     })
+
+    it('allows userId / anonymousId to be specified as an option', () => {
+      const group = factory.group('my_group_id', undefined, {
+        userId: 'bar',
+        anonymousId: 'foo',
+      })
+      expect(group.userId).toBe('bar')
+      expect(group.anonymousId).toBe('foo')
+    })
+
+    it('uses userId / anonymousId from the user class (if specified)', function () {
+      const user = new User()
+      user.anonymousId = () => '123'
+      user.id = () => 'abc'
+      factory = new EventFactory(user)
+      const group = factory.group('my_group_id')
+      expect(group.userId).toBe('abc')
+      expect(group.anonymousId).toBe('123')
+    })
   })
 
   describe('page', () => {
@@ -394,32 +412,6 @@ describe('Event Factory', () => {
     })
   })
 
-  describe('normalize', function () {
-    const msg: SegmentEvent = { type: 'track' }
-    const opts: Options = (msg.options = {})
-
-    describe('message', function () {
-      it('should merge original with normalized', function () {
-        msg.userId = 'user-id'
-        opts.integrations = { Segment: true }
-        const normalized = factory['normalize'](msg)
-
-        expect(normalized.messageId?.length).toBeGreaterThanOrEqual(41) // 'ajs-next-md5(content + [UUID])'
-        delete normalized.messageId
-
-        expect(normalized.timestamp).toBeInstanceOf(Date)
-        delete normalized.timestamp
-
-        expect(normalized).toStrictEqual({
-          integrations: { Segment: true },
-          type: 'track',
-          userId: 'user-id',
-          context: defaultContext,
-        })
-      })
-    })
-  })
-
   describe('Page context augmentation', () => {
     // minimal tests -- more tests should be specifically around addPageContext
     factory = new EventFactory(new User())