fix: flutter session replay

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## Next
 
+- no user facing changes
+
 ## 3.15.7 - 2024-11-25
 
 - fix: detect and mask out system photo library and user photos ([#261](https://github.com/PostHog/posthog-ios/pull/261))

PostHog.xcodeproj/project.pbxproj

@@ -87,6 +87,7 @@
 		6999919A2AFE1BAB000DCB78 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 699991992AFE1BAB000DCB78 /* AppDelegate.swift */; };
 		699C5FE62C20178E007DB818 /* UUIDUtils.swift in Sources */ = {isa = PBXBuildFile; fileRef = 699C5FE52C20178E007DB818 /* UUIDUtils.swift */; };
 		699C5FEF2C20242A007DB818 /* UUIDTest.swift in Sources */ = {isa = PBXBuildFile; fileRef = 699C5FEE2C20242A007DB818 /* UUIDTest.swift */; };
+		69B7F60C2CF7703400A48BCC /* UIImage+Util.swift in Sources */ = {isa = PBXBuildFile; fileRef = 69B7F6062CF7702D00A48BCC /* UIImage+Util.swift */; };
 		69BA38D72B888E8500AA69D6 /* PrivacyInfo.xcprivacy in Resources */ = {isa = PBXBuildFile; fileRef = 69BA38D62B888E8500AA69D6 /* PrivacyInfo.xcprivacy */; };
 		69ED1A5C2C7F15F300FE7A91 /* PostHogSessionManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 69ED1A5B2C7F15F300FE7A91 /* PostHogSessionManager.swift */; };
 		69ED1A882C89B73100FE7A91 /* PostHogSwiftUIViewModifiers.swift in Sources */ = {isa = PBXBuildFile; fileRef = 69ED1A872C89B73100FE7A91 /* PostHogSwiftUIViewModifiers.swift */; };
@@ -358,6 +359,7 @@
 		699991992AFE1BAB000DCB78 /* AppDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
 		699C5FE52C20178E007DB818 /* UUIDUtils.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UUIDUtils.swift; sourceTree = "<group>"; };
 		699C5FEE2C20242A007DB818 /* UUIDTest.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = UUIDTest.swift; sourceTree = "<group>"; };
+		69B7F6062CF7702D00A48BCC /* UIImage+Util.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UIImage+Util.swift"; sourceTree = "<group>"; };
 		69BA38D62B888E8500AA69D6 /* PrivacyInfo.xcprivacy */ = {isa = PBXFileReference; lastKnownFileType = text.xml; path = PrivacyInfo.xcprivacy; sourceTree = "<group>"; };
 		69ED1A5B2C7F15F300FE7A91 /* PostHogSessionManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostHogSessionManager.swift; sourceTree = "<group>"; };
 		69ED1A872C89B73100FE7A91 /* PostHogSwiftUIViewModifiers.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PostHogSwiftUIViewModifiers.swift; sourceTree = "<group>"; };
@@ -723,6 +725,7 @@
 		69EE82B82BA9C4DA00EB9542 /* Replay */ = {
 			isa = PBXGroup;
 			children = (
+				69B7F6062CF7702D00A48BCC /* UIImage+Util.swift */,
 				69EE82B92BA9C50400EB9542 /* PostHogReplayIntegration.swift */,
 				69EE82BB2BA9C53000EB9542 /* PostHogSessionReplayConfig.swift */,
 				69EE82BD2BA9C8AA00EB9542 /* ViewLayoutTracker.swift */,
@@ -1185,6 +1188,7 @@
 				69ED1A9F2C8F451B00FE7A91 /* PostHogPersonProfiles.swift in Sources */,
 				69EE82BA2BA9C50400EB9542 /* PostHogReplayIntegration.swift in Sources */,
 				3AE3FB472992AB0000AFFC18 /* Hedgelog.swift in Sources */,
+				69B7F60C2CF7703400A48BCC /* UIImage+Util.swift in Sources */,
 				69261D132AD5685B00232EC7 /* PostHogFeatureFlags.swift in Sources */,
 				699C5FE62C20178E007DB818 /* UUIDUtils.swift in Sources */,
 				690B2DF32C205B5600AE3B45 /* TimeBasedEpochGenerator.swift in Sources */,

PostHog/PostHogSessionManager.swift

@@ -46,14 +46,13 @@ import Foundation
         timeNow - sessionLastTimestamp > sessionChangeThreshold
     }
 
-    private func isiOSNativeSdk() -> Bool {
-        // postHogSdkName will be set to eg posthog-react-native if not
-        postHogSdkName == postHogiOSSdkName
+    private func isNotReactNative() -> Bool {
+        // for the RN SDK, the session is handled by the RN SDK itself
+        postHogSdkName != "posthog-react-native"
     }
 
     func resetSessionIfExpired(_ completion: () -> Void) {
-        // for hybrid SDKs, the session is handled by the hybrid SDK
-        guard isiOSNativeSdk() else {
+        guard isNotReactNative() else {
             return
         }
 
@@ -89,8 +88,7 @@ import Foundation
     }
 
     func rotateSessionIdIfRequired(_ completion: @escaping (() -> Void)) {
-        // for hybrid SDKs, the session is handled by the hybrid SDK
-        guard isiOSNativeSdk() else {
+        guard isNotReactNative() else {
             return
         }
 
@@ -109,8 +107,7 @@ import Foundation
     }
 
     func updateSessionLastTime() {
-        // for hybrid SDKs, the session is handled by the hybrid SDK
-        guard isiOSNativeSdk() else {
+        guard isNotReactNative() else {
             return
         }
 

PostHog/Replay/Date+Util.swift

@@ -12,3 +12,7 @@ extension Date {
         Int64(timeIntervalSince1970 * 1000)
     }
 }
+
+public func dateToMillis(_ date: Date) -> Int64 {
+    date.toMillis()
+}

PostHog/Replay/PostHogReplayIntegration.swift

@@ -99,14 +99,22 @@
             }
         }
 
+        private func isNotFlutter() -> Bool {
+            postHogSdkName != "posthog-flutter"
+        }
+
         func start() {
             stopTimer()
-            DispatchQueue.main.async {
-                self.timer = Timer.scheduledTimer(withTimeInterval: self.config.sessionReplayConfig.debouncerDelay, repeats: true, block: { _ in
-                    self.snapshot()
-                })
+
+            // flutter captures snapshots, so we don't need to capture them here
+            if isNotFlutter() {
+                DispatchQueue.main.async {
+                    self.timer = Timer.scheduledTimer(withTimeInterval: self.config.sessionReplayConfig.debouncerDelay, repeats: true, block: { _ in
+                        self.snapshot()
+                    })
+                }
+                ViewLayoutTracker.swizzleLayoutSubviews()
             }
-            ViewLayoutTracker.swizzleLayoutSubviews()
 
             UIApplicationTracker.swizzleSendEvent()
 

PostHog/Replay/RRWireframe.swift

@@ -38,17 +38,6 @@ class RRWireframe {
     var parentId: Int?
 
     #if os(iOS)
-        private func imageToBase64(_ image: UIImage) -> String? {
-            let jpegData = image.jpegData(compressionQuality: 0.3)
-            let base64 = jpegData?.base64EncodedString()
-
-            if let base64 = base64 {
-                return "data:image/jpeg;base64,\(base64)"
-            }
-
-            return nil
-        }
-
         private func maskImage() -> UIImage? {
             if let image = image {
                 // the scale also affects the image size/resolution, from usually 100kb to 15kb each
@@ -106,9 +95,9 @@ class RRWireframe {
         #if os(iOS)
             if let image = image {
                 if let maskedImage = maskImage() {
-                    base64 = imageToBase64(maskedImage)
+                    base64 = maskedImage.toBase64()
                 } else {
-                    base64 = imageToBase64(image)
+                    base64 = image.toBase64()
                 }
             }
         #endif

PostHog/Replay/UIImage+Util.swift

@@ -0,0 +1,28 @@
+//
+//  UIImage+Util.swift
+//  PostHog
+//
+//  Created by Manoel Aranda Neto on 27.11.24.
+//
+
+#if os(iOS)
+    import Foundation
+    import UIKit
+
+    extension UIImage {
+        func toBase64(_ compressionQuality: CGFloat = 0.3) -> String? {
+            let jpegData = jpegData(compressionQuality: compressionQuality)
+            let base64 = jpegData?.base64EncodedString()
+
+            if let base64 = base64 {
+                return "data:image/jpeg;base64,\(base64)"
+            }
+
+            return nil
+        }
+    }
+
+    public func imageToBase64(_ image: UIImage, _ compressionQuality: CGFloat = 0.3) -> String? {
+        image.toBase64(compressionQuality)
+    }
+#endif

PostHog/Utils/Data+Gzip.swift

@@ -134,7 +134,7 @@ private extension GzipError.Kind {
     }
 }
 
-public extension Data {
+extension Data {
     /// Whether the receiver is compressed in gzip format.
     var isGzipped: Bool {
         starts(with: [0x1F, 0x8B]) // check magic number

PostHog/Utils/Reachability.swift

@@ -41,7 +41,7 @@ import Foundation
     @available(*, unavailable, renamed: "Notification.Name.reachabilityChanged")
     public let ReachabilityChangedNotification = NSNotification.Name("ReachabilityChangedNotification")
 
-    public extension Notification.Name {
+    extension Notification.Name {
         static let reachabilityChanged = Notification.Name("reachabilityChanged")
     }
 
@@ -162,7 +162,7 @@ import Foundation
         }
     }
 
-    public extension Reachability {
+    extension Reachability {
         // MARK: - *** Notifier methods ***
 
         func startNotifier() throws {

PostHog/Utils/UUIDUtils.swift

@@ -10,7 +10,7 @@
 
 import Foundation
 
-public extension UUID {
+extension UUID {
     static func v7() -> Self {
         TimeBasedEpochGenerator.shared.v7()
     }