Only for comparison. Do not merge

packages/core/android/src/main/kotlin/com/segment/analytics/AnalyticsPlugin.kt

@@ -38,6 +38,7 @@ class AnalyticsPlugin : FlutterPlugin, NativeContextApi, EventChannel.StreamHand
     private fun ByteArray.toHexString() = joinToString("") { "%02x".format(it) }
 
     private val eventsChannel = "analytics/deep_link_events"
+    private val referrerUrl: String? = null
 
     override fun onAttachedToEngine(flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
         context = flutterPluginBinding.applicationContext
@@ -166,6 +167,7 @@ class AnalyticsPlugin : FlutterPlugin, NativeContextApi, EventChannel.StreamHand
                         name = "Android",
                         version = Build.VERSION.RELEASE,
                     ),
+                    referrer = referrerUrl,
                     screen = NativeContextScreen(
                         height = displayMetrics.heightPixels.toLong(),
                         width = displayMetrics.widthPixels.toLong(),
@@ -190,6 +192,7 @@ class AnalyticsPlugin : FlutterPlugin, NativeContextApi, EventChannel.StreamHand
                 } else {
                     val data = mapOf("url" to dataString, "referring_application" to referringApplication)
                     events.success(data)
+                    referrerUrl = dataString
                 }
             }
         }

packages/core/android/src/main/kotlin/com/segment/analytics/Context.kt

@@ -30,6 +30,7 @@ data class NativeContext (
   val locale: String? = null,
   val network: NativeContextNetwork? = null,
   val os: NativeContextOS? = null,
+  val referrer: String? = null,
   val screen: NativeContextScreen? = null,
   val timezone: String? = null,
   val userAgent: String? = null
@@ -54,12 +55,13 @@ data class NativeContext (
       val os: NativeContextOS? = (list[5] as? List<Any?>)?.let {
         NativeContextOS.fromList(it)
       }
-      val screen: NativeContextScreen? = (list[6] as? List<Any?>)?.let {
+      val referrer = list[6] as? String
+      val screen: NativeContextScreen? = (list[7] as? List<Any?>)?.let {
         NativeContextScreen.fromList(it)
       }
-      val timezone = list[7] as? String
-      val userAgent = list[8] as? String
-      return NativeContext(app, device, library, locale, network, os, screen, timezone, userAgent)
+      val timezone = list[8] as? String
+      val userAgent = list[9] as? String
+      return NativeContext(app, device, library, locale, network, os, referrer, screen, timezone, userAgent)
     }
   }
   fun toList(): List<Any?> {
@@ -70,6 +72,7 @@ data class NativeContext (
       locale,
       network?.toList(),
       os?.toList(),
+      referrer,
       screen?.toList(),
       timezone,
       userAgent,

packages/core/ios/Classes/AnalyticsPlugin.swift

@@ -4,6 +4,7 @@ import Foundation
 
 public class AnalyticsPlugin: NSObject, FlutterPlugin, NativeContextApi, FlutterStreamHandler, FlutterApplicationLifeCycleDelegate {
     private var pendingDeeplinkEventsQueue:[[String:String?]] = []
+    private var referrerUrl: String? = nil
     public func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
         _eventSink = events
         processPendingDeeplinkEventsQueue();
@@ -89,6 +90,7 @@ public class AnalyticsPlugin: NSObject, FlutterPlugin, NativeContextApi, Flutter
             os: NativeContextOS(
                 name: device.systemName,
                 version: device.systemVersion),
+            referrer: referrerUrl,
             screen: NativeContextScreen(
                 height: Int32(screen.height),
                 width: Int32(screen.width)),

packages/core/ios/Classes/Context.swift

@@ -39,6 +39,7 @@ struct NativeContext {
   var locale: String? = nil
   var network: NativeContextNetwork? = nil
   var os: NativeContextOS? = nil
+  var referrer: String? = nil
   var screen: NativeContextScreen? = nil
   var timezone: String? = nil
   var userAgent: String? = nil
@@ -65,12 +66,13 @@ struct NativeContext {
     if let osList = list[5] as? [Any?] {
       os = NativeContextOS.fromList(osList)
     }
+    var referrer: String? = list[6] as? String
     var screen: NativeContextScreen? = nil
-    if let screenList = list[6] as? [Any?] {
+    if let screenList = list[7] as? [Any?] {
       screen = NativeContextScreen.fromList(screenList)
     }
-    let timezone = list[7] as? String 
-    let userAgent = list[8] as? String 
+    let timezone = list[8] as? String 
+    let userAgent = list[9] as? String 
 
     return NativeContext(
       app: app,
@@ -79,6 +81,7 @@ struct NativeContext {
       locale: locale,
       network: network,
       os: os,
+      referrer: referrer,
       screen: screen,
       timezone: timezone,
       userAgent: userAgent
@@ -92,6 +95,7 @@ struct NativeContext {
       locale,
       network?.toList(),
       os?.toList(),
+      referrer,
       screen?.toList(),
       timezone,
       userAgent,

packages/core/lib/analytics_web.dart

@@ -23,6 +23,7 @@ class AnalyticsPlatformImpl extends AnalyticsPlatform {
         ),
         userAgent: web.window.navigator.userAgent,
         locale: web.window.navigator.language,
+        referrer: web.window.document.referrer, // SETH PLZ CHECK ME ON THIS
         screen: NativeContextScreen(
           height: web.window.screen.height,
           width: web.window.screen.width,

packages/core/lib/event.dart

@@ -327,13 +327,14 @@ class Context extends JSONExtendableImpl {
   String locale;
   ContextNetwork network;
   ContextOS os;
+  String referrer;
   ContextScreen screen;
   String timezone;
   String? instanceId;
   UserTraits traits;
 
   Context(this.app, this.device, this.library, this.locale, this.network,
-      this.os, this.screen, this.timezone, this.traits,
+      this.os, this.referrer, this.screen, this.timezone, this.traits,
       {this.instanceId, super.custom});
   Context.fromNative(NativeContext nativeContext, this.traits)
       : app = nativeContext.app == null
@@ -355,6 +356,7 @@ class Context extends JSONExtendableImpl {
         os = nativeContext.os == null
             ? ContextOS("", "")
             : ContextOS.fromNative(nativeContext.os as NativeContextOS),
+        referrer = nativeContext.referrer ?? "",
         screen = nativeContext.screen == null
             ? ContextScreen(0, 0)
             : ContextScreen.fromNative(
@@ -372,6 +374,7 @@ class Context extends JSONExtendableImpl {
     "locale",
     "network",
     "os",
+    "referrer",
     "screen",
     "timezone",
     "traits"
@@ -653,6 +656,7 @@ Context mergeContext(Context a, Context b) {
       a.locale,
       a.network,
       a.os,
+      a.referrer,
       mergeContextScreen(a.screen, b.screen),
       a.timezone,
       a.traits,

packages/core/lib/native_context.dart

@@ -16,6 +16,7 @@ class NativeContext {
     this.locale,
     this.network,
     this.os,
+    this.referrer,
     this.screen,
     this.timezone,
     this.userAgent,
@@ -33,6 +34,8 @@ class NativeContext {
 
   NativeContextOS? os;
 
+  String? referrer;
+
   NativeContextScreen? screen;
 
   String? timezone;
@@ -47,6 +50,7 @@ class NativeContext {
       locale,
       network?.encode(),
       os?.encode(),
+      referrer,
       screen?.encode(),
       timezone,
       userAgent,
@@ -72,11 +76,12 @@ class NativeContext {
       os: result[5] != null
           ? NativeContextOS.decode(result[5]! as List<Object?>)
           : null,
-      screen: result[6] != null
-          ? NativeContextScreen.decode(result[6]! as List<Object?>)
+      referrer: result[6] as String?,
+      screen: result[7] != null
+          ? NativeContextScreen.decode(result[7]! as List<Object?>)
           : null,
-      timezone: result[7] as String?,
-      userAgent: result[8] as String?,
+      timezone: result[8] as String?,
+      userAgent: result[9] as String?,
     );
   }
 }

packages/core/macos/Classes/AnalyticsPlugin.swift

@@ -54,6 +54,7 @@ internal static var device = VendorSystem.current
             os: NativeContextOS(
                 name: device.systemName,
                 version: device.systemVersion),
+            referrer: nil,
             screen: NativeContextScreen(
                 height: Int32(screen.height),
                 width: Int32(screen.width)),

packages/core/macos/Classes/Context.swift

@@ -39,6 +39,7 @@ struct NativeContext {
   var locale: String? = nil
   var network: NativeContextNetwork? = nil
   var os: NativeContextOS? = nil
+  var referrer: String? = nil
   var screen: NativeContextScreen? = nil
   var timezone: String? = nil
   var userAgent: String? = nil
@@ -65,12 +66,13 @@ struct NativeContext {
     if let osList = list[5] as? [Any?] {
       os = NativeContextOS.fromList(osList)
     }
+    let referrer = list[6] as? String
     var screen: NativeContextScreen? = nil
-    if let screenList = list[6] as? [Any?] {
+    if let screenList = list[7] as? [Any?] {
       screen = NativeContextScreen.fromList(screenList)
     }
-    let timezone = list[7] as? String 
-    let userAgent = list[8] as? String 
+    let timezone = list[8] as? String 
+    let userAgent = list[9] as? String 
 
     return NativeContext(
       app: app,
@@ -79,6 +81,7 @@ struct NativeContext {
       locale: locale,
       network: network,
       os: os,
+      referrer: referrer,
       screen: screen,
       timezone: timezone,
       userAgent: userAgent
@@ -92,6 +95,7 @@ struct NativeContext {
       locale,
       network?.toList(),
       os?.toList(),
+      referrer,
       screen?.toList(),
       timezone,
       userAgent,

packages/core/pigeon/context.dart

@@ -7,6 +7,7 @@ class NativeContext {
   String? locale;
   NativeContextNetwork? network;
   NativeContextOS? os;
+  String? referrer;
   NativeContextScreen? screen;
   String? timezone;
   String? userAgent;

packages/core/test/events_test.dart

@@ -17,6 +17,7 @@ class MockPlatform extends AnalyticsPlatform {
     mockNativeContext.os = NativeContextOS();
     mockNativeContext.os!.name = "iOS";
     mockNativeContext.os!.version = "14.1";
+    mockNativeContext.referrer = "referrer";
     mockNativeContext.screen = NativeContextScreen();
     mockNativeContext.screen!.height = 800;
     mockNativeContext.screen!.width = 600;
@@ -55,6 +56,7 @@ class MockPlatform extends AnalyticsPlatform {
       "en_EN",
       networkObj,
       osObj,
+      "referrer",
       screenObj,
       "timezone",
       "userAgent"