#106: Begin adding the Analytics class from EI.

No UI or SDK support to enable/disable yet and no tracking is implemented.

ElementX.xcodeproj/project.pbxproj

@@ -56,7 +56,6 @@
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@@ -154,7 +156,7 @@
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@@ -192,15 +194,17 @@
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+		5445FCE0CE15E634FDC1A2E2 /* AnalyticsService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnalyticsService.swift; sourceTree = "<group>"; };
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 		72F37B5DA798C9AE436F2C2C /* AttributedStringBuilderProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttributedStringBuilderProtocol.swift; sourceTree = "<group>"; };
+		73FC861755C6388F62B9280A /* Analytics.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Analytics.swift; sourceTree = "<group>"; };
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+		A6B891A6DA826E2461DBB40F /* PHGPostHogConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PHGPostHogConfiguration.swift; sourceTree = "<group>"; };
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+		C687844F60BFF532D49A994C /* AnalyticsTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnalyticsTests.swift; sourceTree = "<group>"; };
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 		CBDA364DFFC3AC71C4771251 /* NoticeRoomMessage.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = NoticeRoomMessage.swift; sourceTree = "<group>"; };
+		CBF9AEA706926DD0DA2B954C /* JoinedRoomSize+MemberCount.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "JoinedRoomSize+MemberCount.swift"; sourceTree = "<group>"; };
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@@ -696,6 +714,7 @@
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 		D6DC38E64A5ED3FDB201029A /* BugReportService.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BugReportService.swift; sourceTree = "<group>"; };
+		D77B3D4950F1707E66E4A45A /* AnalyticsConfiguration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnalyticsConfiguration.swift; sourceTree = "<group>"; };
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+		E3B97591B2D3D4D67553506D /* AnalyticsClientProtocol.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AnalyticsClientProtocol.swift; sourceTree = "<group>"; };
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@@ -786,15 +806,17 @@
 			files = (
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 				1F3232BD368DF430AB433907 /* DesignKit in Frameworks */,
-				F656F92A63D3DC1978D79427 /* AppAuth in Frameworks */,
+				F656F92A63D3DC1978D79427 /* AnalyticsEvents in Frameworks */,
-				9D2E03DB175A6AB14589076D /* DTCoreText in Frameworks */,
+				9D2E03DB175A6AB14589076D /* AppAuth in Frameworks */,
-				6F2AB43A1EFAD8A97AF41A15 /* KeychainAccess in Frameworks */,
+				6F2AB43A1EFAD8A97AF41A15 /* DTCoreText in Frameworks */,
-				93BA4A81B6D893271101F9F0 /* Kingfisher in Frameworks */,
+				93BA4A81B6D893271101F9F0 /* KeychainAccess in Frameworks */,
-				9AC5F8142413862A9E3A2D98 /* Introspect in Frameworks */,
+				9AC5F8142413862A9E3A2D98 /* Kingfisher in Frameworks */,
-				CB137BFB3E083C33E398A6CB /* SwiftyBeaver in Frameworks */,
+				CB137BFB3E083C33E398A6CB /* Introspect in Frameworks */,
-				3C549A0BF39F8A854D45D9FD /* SwiftState in Frameworks */,
+				3C549A0BF39F8A854D45D9FD /* PostHog in Frameworks */,
-				41DFDD212D1BE57CA50D783B /* GZIP in Frameworks */,
+				41DFDD212D1BE57CA50D783B /* SwiftyBeaver in Frameworks */,
-				6298AB0906DDD3525CD78C6B /* Sentry in Frameworks */,
+				6298AB0906DDD3525CD78C6B /* SwiftState in Frameworks */,
+				407DCE030E0F9B7C9861D38A /* GZIP in Frameworks */,
+				8F2FAA98457750D9D664136F /* Sentry in Frameworks */,
 			);
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 		};
@@ -838,6 +860,7 @@
 		0787F81684E503024BD0C051 /* Services */ = {
 			isa = PBXGroup;
 			children = (
+				4BF8D11D9ED15CFC373D0119 /* Analytics */,
 				AAFDD509929A0CCF8BCE51EB /* Authentication */,
 				EBBEB5471737E9D116DF4738 /* Background */,
 				0ED3F5C21537519389C07644 /* BugReport */,
@@ -953,6 +976,15 @@
 			path = ServerSelection;
 			sourceTree = "<group>";
 		};
+		3A304097A59704AC9B869EC6 /* Helpers */ = {
+			isa = PBXGroup;
+			children = (
+				CBF9AEA706926DD0DA2B954C /* JoinedRoomSize+MemberCount.swift */,
+				6A6C4BE591FE5C38CE9C7EF3 /* UserProperties+Element.swift */,
+			);
+			path = Helpers;
+			sourceTree = "<group>";
+		};
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 			isa = PBXGroup;
 			children = (
@@ -1049,6 +1081,21 @@
 			path = Tests;
 			sourceTree = "<group>";
 		};
+		4BF8D11D9ED15CFC373D0119 /* Analytics */ = {
+			isa = PBXGroup;
+			children = (
+				73FC861755C6388F62B9280A /* Analytics.swift */,
+				E3B97591B2D3D4D67553506D /* AnalyticsClientProtocol.swift */,
+				D77B3D4950F1707E66E4A45A /* AnalyticsConfiguration.swift */,
+				5445FCE0CE15E634FDC1A2E2 /* AnalyticsService.swift */,
+				4B362E695A7103C11F64B185 /* AnalyticsSettings.swift */,
+				A6B891A6DA826E2461DBB40F /* PHGPostHogConfiguration.swift */,
+				1715E3D7F53C0748AA50C91C /* PostHogAnalyticsClient.swift */,
+				3A304097A59704AC9B869EC6 /* Helpers */,
+			);
+			path = Analytics;
+			sourceTree = "<group>";
+		};
 		4EC4EBBC4F6885775F198875 /* Sources */ = {
 			isa = PBXGroup;
 			children = (
@@ -1180,6 +1227,7 @@
 		73CD9796729EB702B4DFA88C /* Sources */ = {
 			isa = PBXGroup;
 			children = (
+				C687844F60BFF532D49A994C /* AnalyticsTests.swift */,
 				AF25E364AE85090A70AE4644 /* AttributedStringBuilderTests.swift */,
 				6DFCAA239095A116976E32C4 /* BackgroundTaskTests.swift */,
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@@ -1782,11 +1830,13 @@
 			packageProductDependencies = (
 				A678E40E917620059695F067 /* MatrixRustSDK */,
 				A5A56C4F47C368EBE5C5E870 /* DesignKit */,
+				2A3F7BCCB18C15B30CCA39A9 /* AnalyticsEvents */,
 				AA4E1BEB4E9BC2467006E12B /* AppAuth */,
 				531CE4334AC5CA8DFF6AEB84 /* DTCoreText */,
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 				0DD568A494247444A4B56031 /* Kingfisher */,
 				5986E300FC849DEAB2EE7AEB /* Introspect */,
+				4278261E147DB2DE5CFB7FC5 /* PostHog */,
 				FD43A50D9B75C9D6D30F006B /* SwiftyBeaver */,
 				9573B94B1C86C6DF751AF3FD /* SwiftState */,
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@@ -1926,6 +1976,7 @@
 			);
 			mainGroup = 405B00F139AEE3994601B36A;
 			packageReferences = (
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 				80B898A3AD2AC63F3ABFC218 /* XCRemoteSwiftPackageReference "matrix-rust-components-swift" */,
+				96495DD8554E2F39D3954354 /* XCRemoteSwiftPackageReference "posthog-ios" */,
 				A08925A9D5E3770DEB9D8509 /* XCRemoteSwiftPackageReference "sentry-cocoa" */,
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@@ -2082,11 +2134,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				890F0D453FE388756479AC97 /* AnalyticsTests.swift in Sources */,
 				90DF83A6A347F7EE7EDE89EE /* AttributedStringBuilderTests.swift in Sources */,
 				0F9E38A75337D0146652ACAB /* BackgroundTaskTests.swift in Sources */,
 				7F61F9ACD5EC9E845EF3EFBF /* BugReportServiceTests.swift in Sources */,
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-				CA1E41AE5CDCB8D801DE0830 /* BuildSettings.swift in Sources */,
 				9C45CE85325CD591DADBC4CA /* ElementXTests.swift in Sources */,
 				F6F49E37272AD7397CD29A01 /* HomeScreenViewModelTests.swift in Sources */,
 				0B1F80C2BF7D223159FBA82C /* ImageAnonymizerTests.swift in Sources */,
@@ -2102,7 +2154,6 @@
 				206F0DBAB6AF042CA1FF2C0D /* SettingsViewModelTests.swift in Sources */,
 				94E062D08E27B0387658E364 /* SplashScreenViewModelTests.swift in Sources */,
 				7AE1FFB132F2B84EB8A2AEBC /* TemplateViewModelTests.swift in Sources */,
-				226027BE23AF64FA61C7A4C0 /* TimelineStyle.swift in Sources */,
 				1151DCC5EC2C6585826545EC /* UserIndicatorPresenterSpy.swift in Sources */,
 				4B8A2C45FF906ADBB1F5C3B4 /* UserIndicatorQueueTests.swift in Sources */,
 				BEEC06EFD30BFCA02F0FD559 /* UserIndicatorTests.swift in Sources */,
@@ -2117,6 +2168,11 @@
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 				FC6B7436C3A5B3D0565227D5 /* ActivityIndicatorView.swift in Sources */,
 				A50849766F056FD1DB942DEA /* AlertInfo.swift in Sources */,
+				A371629728E597C5FCA3C2B2 /* Analytics.swift in Sources */,
+				F7567DD6635434E8C563BF85 /* AnalyticsClientProtocol.swift in Sources */,
+				54C774874BED4A8FAD1F22FE /* AnalyticsConfiguration.swift in Sources */,
+				3C73442084BF8A6939F0F80B /* AnalyticsService.swift in Sources */,
+				EC4C31963E755EEC77BD778C /* AnalyticsSettings.swift in Sources */,
 				A636D4900E0D98ED91536482 /* AppCoordinator.swift in Sources */,
 				B3FDB1D9CF40777695DBBD1D /* AppCoordinatorStateMachine.swift in Sources */,
 				2FE4EEF780553B25A446BBFB /* AppDelegate.swift in Sources */,
@@ -2174,6 +2230,7 @@
 				DDB80FD2753FEAAE43CC2AAE /* ImageRoomTimelineItem.swift in Sources */,
 				D5EA4C6C80579279770D5804 /* ImageRoomTimelineView.swift in Sources */,
 				A5C8F013ED9FB8AA6FEE18A7 /* InfoPlist.swift in Sources */,
+				E3CA565A4B9704F191B191F0 /* JoinedRoomSize+MemberCount.swift in Sources */,
 				F4C3FEDB1B3A05376A1723A3 /* KeychainController.swift in Sources */,
 				F2DD8661B5C0BA2BB526FA6C /* KeychainControllerProtocol.swift in Sources */,
 				9C9E48A627C7C166084E3F5B /* LabelledActivityIndicatorView.swift in Sources */,
@@ -2217,7 +2274,9 @@
 				8BBD3AA589DEE02A1B0923B2 /* NoticeRoomTimelineItem.swift in Sources */,
 				368C8758FCD079E6AAA18C2C /* NoticeRoomTimelineView.swift in Sources */,
 				563A05B43207D00A6B698211 /* OIDCService.swift in Sources */,
+				CD6A72B65D3B6076F4045C30 /* PHGPostHogConfiguration.swift in Sources */,
 				7D1DAAA364A9A29D554BD24E /* PlaceholderAvatarImage.swift in Sources */,
+				DF504B10A4918F971A57BEF2 /* PostHogAnalyticsClient.swift in Sources */,
 				BF35062D06888FA80BD139FF /* Presentable.swift in Sources */,
 				C76892321558E75101E68ED6 /* ReadableFrameModifier.swift in Sources */,
 				53B9C2240C2F5533246EE230 /* RectangleToastView.swift in Sources */,
@@ -2314,6 +2373,7 @@
 				15D1F9C415D9C921643BA82E /* UserIndicatorRequest.swift in Sources */,
 				C052A8CDC7A8E7A2D906674F /* UserIndicatorStore.swift in Sources */,
 				80E04BE80A89A78FBB4863BB /* UserIndicatorViewPresentable.swift in Sources */,
+				9CCC77C31CB399661A034739 /* UserProperties+Element.swift in Sources */,
 				8AB8ED1051216546CB35FA0E /* UserSession.swift in Sources */,
 				978BB24F2A5D31EE59EEC249 /* UserSessionProtocol.swift in Sources */,
 				79A6E08ADE6E7C460A8A17A5 /* UserSessionStore.swift in Sources */,
@@ -2934,6 +2994,14 @@
 				version = "1.0.13-alpha";
 			};
 		};
+		96495DD8554E2F39D3954354 /* XCRemoteSwiftPackageReference "posthog-ios" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/PostHog/posthog-ios";
+			requirement = {
+				kind = upToNextMajorVersion;
+				minimumVersion = 1.4.4;
+			};
+		};
 		9A472EE0218FE7DCF5283429 /* XCRemoteSwiftPackageReference "SwiftUI-Introspect" */ = {
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/siteline/SwiftUI-Introspect";
@@ -2950,6 +3018,14 @@
 				minimumVersion = 7.15.0;
 			};
 		};
+		AC3475112CA40C2C6E78D1EB /* XCRemoteSwiftPackageReference "matrix-analytics-events" */ = {
+			isa = XCRemoteSwiftPackageReference;
+			repositoryURL = "https://github.com/matrix-org/matrix-analytics-events";
+			requirement = {
+				branch = main;
+				kind = branch;
+			};
+		};
 		C13F55E4518415CB4C278E73 /* XCRemoteSwiftPackageReference "DTCoreText" */ = {
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/Cocoanetics/DTCoreText";
@@ -3007,6 +3083,11 @@
 			package = E9C4F3A12AA1F65C13A8C8EB /* XCRemoteSwiftPackageReference "swift-snapshot-testing" */;
 			productName = SnapshotTesting;
 		};
+		2A3F7BCCB18C15B30CCA39A9 /* AnalyticsEvents */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = AC3475112CA40C2C6E78D1EB /* XCRemoteSwiftPackageReference "matrix-analytics-events" */;
+			productName = AnalyticsEvents;
+		};
 		2B43F2AF7456567FE37270A7 /* KeychainAccess */ = {
 			isa = XCSwiftPackageProductDependency;
 			package = 61916C63E3F5BD900F08DA0C /* XCRemoteSwiftPackageReference "KeychainAccess" */;
@@ -3027,6 +3108,11 @@
 			package = 6582B5AF3F104B0F7E031E7D /* XCRemoteSwiftPackageReference "SwiftState" */;
 			productName = SwiftState;
 		};
+		4278261E147DB2DE5CFB7FC5 /* PostHog */ = {
+			isa = XCSwiftPackageProductDependency;
+			package = 96495DD8554E2F39D3954354 /* XCRemoteSwiftPackageReference "posthog-ios" */;
+			productName = PostHog;
+		};
 		4346F63D53A346271577FD9C /* AppAuth */ = {
 			isa = XCSwiftPackageProductDependency;
 			package = 4CE94127E27181B8B72188F0 /* XCRemoteSwiftPackageReference "AppAuth-iOS" */;

ElementX.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -63,6 +63,15 @@
         "version" : "7.2.4"
       }
     },
+    {
+      "identity" : "matrix-analytics-events",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/matrix-org/matrix-analytics-events",
+      "state" : {
+        "branch" : "main",
+        "revision" : "53ad46ba1ea1ee8f21139dda3c351890846a202f"
+      }
+    },
     {
       "identity" : "matrix-rust-components-swift",
       "kind" : "remoteSourceControl",
@@ -72,6 +81,15 @@
         "version" : "1.0.13-alpha"
       }
     },
+    {
+      "identity" : "posthog-ios",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/PostHog/posthog-ios",
+      "state" : {
+        "revision" : "d3177a24686ead147f5e4ff4d7e284ca4be33870",
+        "version" : "1.4.4"
+      }
+    },
     {
       "identity" : "sentry-cocoa",
       "kind" : "remoteSourceControl",

ElementX/Sources/BuildSettings.swift

@@ -30,6 +30,24 @@ final class BuildSettings {
     static let bugReportUISIId = "element-auto-uisi"
 
     static let bugReportGHLabels = ["Element-X"]
+    
+    // MARK: - Analytics
+    
+    #if DEBUG
+    /// The configuration to use for analytics during development. Set `isEnabled` to false to disable analytics in debug builds.
+    /// **Note:** Analytics are disabled by default for forks. If you are maintaining a fork, set custom configurations.
+    static let analyticsConfiguration = AnalyticsConfiguration(isEnabled: ElementInfoPlist.cfBundleIdentifier.starts(with: "io.element.elementx"),
+                                                               host: "https://posthog.element.dev",
+                                                               apiKey: "phc_VtA1L35nw3aeAtHIx1ayrGdzGkss7k1xINeXcoIQzXN",
+                                                               termsURL: URL(string: "https://element.io/cookie-policy")!) // swiftlint:disable:this force_unwrapping
+    #else
+    /// The configuration to use for analytics. Set `isEnabled` to false to disable analytics.
+    /// **Note:** Analytics are disabled by default for forks. If you are maintaining a fork, set custom configurations.
+    static let analyticsConfiguration = AnalyticsConfiguration(isEnabled: ElementInfoPlist.cfBundleIdentifier.starts(with: "io.element.elementx"),
+                                                               host: "https://posthog.hss.element.io",
+                                                               apiKey: "phc_Jzsm6DTm6V2705zeU5dcNvQDlonOR68XvX2sh1sEOHO",
+                                                               termsURL: URL(string: "https://element.io/cookie-policy")!) // swiftlint:disable:this force_unwrapping
+    #endif
 
     // MARK: - Settings screen
 

ElementX/Sources/Other/ElementSettings.swift

@@ -23,6 +23,8 @@ final class ElementSettings: ObservableObject {
 
     public enum UserDefaultsKeys: String {
         case timelineStyle
+        case enableAnalytics
+        case isIdentifiedForAnalytics
     }
 
     static let shared = ElementSettings()
@@ -35,8 +37,25 @@ final class ElementSettings: ObservableObject {
     private init() {
         // no-op
     }
+    
+    // MARK: - Analytics
+    
+    /// Whether the user has already been shown the PostHog analytics prompt.
+    var hasSeenAnalyticsPrompt: Bool {
+        Self.store.object(forKey: UserDefaultsKeys.enableAnalytics.rawValue) != nil
+    }
+    
+    /// `true` when the user has opted in to send analytics.
+    @AppStorage(UserDefaultsKeys.enableAnalytics.rawValue, store: store)
+    var enableAnalytics = false
+    
+    /// Indicates if the device has already called identify for this session to PostHog.
+    /// This is separate to `enableAnalytics` as logging out leaves analytics
+    /// enabled, but requires the next account to be identified separately.
+    @AppStorage(UserDefaultsKeys.isIdentifiedForAnalytics.rawValue, store: store)
+    var isIdentifiedForAnalytics = false
 
-    // MARK: -
+    // MARK: - Room Screen
 
     @AppStorage(UserDefaultsKeys.timelineStyle.rawValue, store: store)
     var timelineStyle = BuildSettings.defaultRoomTimelineStyle

ElementX/Sources/Services/Analytics/Analytics.swift

@@ -0,0 +1,173 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+import PostHog
+
+/// A class responsible for managing a variety of analytics clients
+/// and sending events through these clients.
+///
+/// Events may include user activity, or app health data such as crashes,
+/// non-fatal issues and performance. `Analytics` class serves as a façade
+/// to all these use cases.
+///
+/// ## Creating Analytics Events
+///
+/// Events are managed in a shared repo for all Element clients https://github.com/matrix-org/matrix-analytics-events
+/// To add a new event create a PR to that repo with the new/updated schema. Once merged
+/// into `main`, update the AnalyticsEvents Swift package in `project.yml`.
+///
+class Analytics {
+    // MARK: - Properties
+    
+    /// The singleton instance to be used within the Riot target.
+    static let shared = Analytics()
+    
+    /// The analytics client to send events with.
+    private var client: AnalyticsClientProtocol = PostHogAnalyticsClient()
+    
+    /// The monitoring client to track crashes, issues and performance
+//    private var monitoringClient = SentryMonitoringClient()
+    
+    /// The service used to interact with account data settings.
+    private var service: AnalyticsService?
+    
+    /// Whether or not the object is enabled and sending events to the server.
+    var isRunning: Bool { client.isRunning }
+    
+    /// Whether to show the user the analytics opt in prompt.
+    var shouldShowAnalyticsPrompt: Bool {
+        // Only show the prompt once, and when analytics are enabled in BuildSettings.
+        !ElementSettings.shared.hasSeenAnalyticsPrompt && BuildSettings.analyticsConfiguration.isEnabled
+    }
+    
+    // MARK: - Public
+    
+    /// Opts in to analytics tracking with the supplied session.
+    /// - Parameter session: An optional session to use to when reading/generating the analytics ID.
+    ///  The session will be ignored if not running.
+    func optIn(with session: UserSessionProtocol) {
+        ElementSettings.shared.enableAnalytics = true
+        startIfEnabled()
+        
+        Task { await useAnalyticsSettings(from: session) }
+    }
+    
+    /// Stops analytics tracking and calls `reset` to clear any IDs and event queues.
+    func optOut() {
+        ElementSettings.shared.enableAnalytics = false
+        
+        // The order is important here. PostHog ignores the reset if stopped.
+        reset()
+        client.stop()
+//        monitoringClient.stop()
+        
+        MXLog.debug("Stopped.")
+    }
+    
+    /// Starts the analytics client if the user has opted in, otherwise does nothing.
+    func startIfEnabled() {
+        guard ElementSettings.shared.enableAnalytics, !isRunning else { return }
+        
+        client.start()
+//        monitoringClient.start()
+        
+        // Sanity check in case something went wrong.
+        guard client.isRunning else { return }
+        
+        MXLog.debug("Started.")
+        
+        // Catch and log crashes
+//        MXLogger.logCrashes(true)
+//        MXLogger.setBuildVersion(ElementInfoPlist.cfBundleShortVersionString)
+    }
+    
+    /// Use the analytics settings from the supplied session to configure analytics.
+    /// For now this is only used for (pseudonymous) identification.
+    /// - Parameter session: The session to read analytics settings from.
+    func useAnalyticsSettings(from session: UserSessionProtocol) async {
+        guard
+            ElementSettings.shared.enableAnalytics,
+            !ElementSettings.shared.isIdentifiedForAnalytics
+        else { return }
+        
+        let service = AnalyticsService(session: session)
+        self.service = service
+        
+        switch await service.settings() {
+        case .success(let settings):
+            identify(with: settings)
+            self.service = nil
+        case .failure:
+            MXLog.error("Failed to use analytics settings. Will continue to run without analytics ID.")
+            self.service = nil
+        }
+    }
+    
+    /// Resets the any IDs and event queues in the analytics client. This method should
+    /// be called on sign-out to maintain opt-in status, whilst ensuring the next
+    /// account used isn't associated with the previous one.
+    /// Note: **MUST** be called before stopping PostHog or the reset is ignored.
+    func reset() {
+        client.reset()
+//        monitoringClient.reset()
+        
+        MXLog.debug("Reset.")
+        ElementSettings.shared.isIdentifiedForAnalytics = false
+        
+        // Stop collecting crash logs
+//        MXLogger.logCrashes(false)
+    }
+    
+    /// Flushes the event queue in the analytics client, uploading all pending events.
+    /// Normally events are sent in batches. Call this method when you need an event
+    /// to be sent immediately.
+    func forceUpload() {
+        client.flush()
+    }
+    
+    // MARK: - Private
+    
+    /// Identify (pseudonymously) any future events with the ID from the analytics account data settings.
+    /// - Parameter settings: The settings to use for identification. The ID must be set *before* calling this method.
+    private func identify(with settings: AnalyticsSettings) {
+        guard let id = settings.id else {
+            MXLog.error("identify(with:) called before an ID has been generated.")
+            return
+        }
+        
+        client.identify(id: id)
+        MXLog.debug("Identified.")
+        ElementSettings.shared.isIdentifiedForAnalytics = true
+    }
+    
+    /// Capture an event in the `client`.
+    /// - Parameter event: The event to capture.
+    private func capture(event: AnalyticsEventProtocol) {
+        client.capture(event)
+    }
+}
+
+// MARK: - Public tracking methods
+
+// The following methods are exposed for compatibility with Objective-C as
+// the `capture` method and the generated events cannot be bridged from Swift.
+extension Analytics { }
+
+// MARK: - MXAnalyticsDelegate
+
+// extension Analytics: MXAnalyticsDelegate {
+// }

ElementX/Sources/Services/Analytics/AnalyticsClientProtocol.swift

@@ -0,0 +1,56 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+
+/// A protocol representing an analytics client.
+protocol AnalyticsClientProtocol {
+    /// Whether the analytics client is currently reporting data or ignoring it.
+    var isRunning: Bool { get }
+    
+    /// Starts the analytics client reporting data.
+    func start()
+    
+    /// Associate the client with an ID. This is persisted until `reset` is called.
+    /// - Parameter id: The ID to associate with the user.
+    func identify(id: String)
+    
+    /// Reset all stored properties and any event queues on the client. Note that
+    /// the client will remain active, but in a fresh unidentified state.
+    func reset()
+    
+    /// Stop the analytics client reporting data.
+    func stop()
+    
+    /// Send any queued events immediately.
+    func flush()
+    
+    /// Capture the supplied analytics event.
+    /// - Parameter event: The event to capture.
+    func capture(_ event: AnalyticsEventProtocol)
+    
+    /// Capture the supplied analytics screen event.
+    /// - Parameter event: The screen event to capture.
+    func screen(_ event: AnalyticsScreenProtocol)
+    
+    /// Updates any user properties to help with creating cohorts.
+    /// - Parameter userProperties: The user properties to be updated.
+    ///
+    /// Only non-nil properties will be updated when calling this method. There might
+    /// be a delay when updating user properties as these are cached to be included
+    /// as part of the next event that gets captured.
+    func updateUserProperties(_ userProperties: AnalyticsEvent.UserProperties)
+}

ElementX/Sources/Services/Analytics/AnalyticsConfiguration.swift

@@ -0,0 +1,29 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// 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.
+//
+
+import Foundation
+
+/// A type that represents how to set up the analytics module in the app.
+struct AnalyticsConfiguration {
+    /// Whether or not analytics should be enabled.
+    let isEnabled: Bool
+    /// The host to use for PostHog analytics.
+    let host: String
+    /// The public key for submitting analytics.
+    let apiKey: String
+    /// The URL to open with more information about analytics terms.
+    let termsURL: URL
+}

ElementX/Sources/Services/Analytics/AnalyticsService.swift

@@ -0,0 +1,75 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import Foundation
+
+enum AnalyticsServiceError: Error {
+    /// The session supplied to the service does not have a state of `MXSessionStateRunning`.
+    case sessionIsNotRunning
+    /// The service failed to get or update the analytics settings event from the user's account data.
+    case accountDataFailure
+}
+
+/// A service responsible for handling the `im.vector.analytics` event from the user's account data.
+class AnalyticsService {
+    let session: UserSessionProtocol
+    
+    /// Creates an analytics service with the supplied session.
+    /// - Parameter session: The session to use when reading analytics settings from account data.
+    init(session: UserSessionProtocol) {
+        self.session = session
+    }
+    
+    /// The analytics settings for the current user. Calling this method will check whether the settings already
+    /// contain an `id` property and if not, will add one to the account data before calling the completion.
+    /// - Parameter completion: A completion handler that will be called when the request completes.
+    ///
+    /// The request will fail if the service's session does not have the `MXSessionStateRunning` state.
+    func settings() async -> Result<AnalyticsSettings, AnalyticsServiceError> {
+        // Only use the session if it is running otherwise we could wipe out an existing analytics ID.
+        fatalWithoutUnreachableCodeWarning()
+//        guard session.state == .running else {
+//            MXLog.warning("Aborting attempt to read analytics settings. The session may not be up-to-date.")
+//            return .failure(.sessionIsNotRunning)
+//        }
+        
+        let result: Result<AnalyticsSettings?, ClientProxyError> = await session.clientProxy.accountDataEvent(type: AnalyticsSettings.eventType)
+        switch result {
+        case .failure:
+            return .failure(.accountDataFailure)
+        case .success(let settings):
+            // The id has already be set so we are done here.
+            if let settings = settings, settings.id != nil {
+                return .success(settings)
+            }
+            
+            let newSettings = AnalyticsSettings.new(currentEvent: settings)
+            switch await session.clientProxy.setAccountData(content: newSettings, type: AnalyticsSettings.eventType) {
+            case .failure:
+                MXLog.warning("Failed to update analytics settings.")
+                return .failure(.accountDataFailure)
+            case .success:
+                MXLog.debug("Successfully updated analytics settings in account data.")
+                return .success(newSettings)
+            }
+        }
+    }
+    
+    /// Silences a warning on some intentionally unreachable code.
+    func fatalWithoutUnreachableCodeWarning() {
+        fatalError("Missing running state detection.")
+    }
+}

ElementX/Sources/Services/Analytics/AnalyticsSettings.swift

@@ -0,0 +1,50 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import Foundation
+
+/// An analytics settings event from the user's account data.
+struct AnalyticsSettings: Codable {
+    static let eventType = "im.vector.analytics"
+    
+    /// A randomly generated analytics token for this user.
+    /// This is suggested to be a UUID string.
+    let id: String?
+    
+    /// Whether the user has opted in on web or not. This is unused on iOS but necessary
+    /// to store here so that it's value is preserved when updating the account data if we
+    /// generated an ID on iOS.
+    ///
+    /// `true` if opted in on web, `false` if opted out on web and `nil` if the web prompt is not yet seen.
+    private let webOptIn: Bool?
+    
+    enum CodingKeys: String, CodingKey {
+        case id
+        case webOptIn = "pseudonymousAnalyticsOptIn"
+    }
+}
+
+extension AnalyticsSettings {
+    /// Generates a new AnalyticsSettings value (inc an ID if necessary) based upon an
+    /// existing value. This is the only way the type should be created so as to avoid wiping
+    /// out the `webOptIn` value that the user may already have set.
+    ///
+    /// **Note:** Please don't pass a `nil` literal to this method.
+    static func new(currentEvent: AnalyticsSettings?) -> AnalyticsSettings {
+        AnalyticsSettings(id: currentEvent?.id ?? UUID().uuidString,
+                          webOptIn: currentEvent?.webOptIn)
+    }
+}

ElementX/Sources/Services/Analytics/Helpers/JoinedRoomSize+MemberCount.swift

@@ -0,0 +1,36 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+
+extension AnalyticsEvent.JoinedRoom.RoomSize {
+    init?(memberCount: UInt) {
+        switch memberCount {
+        case 2:
+            self = .Two
+        case 3...10:
+            self = .ThreeToTen
+        case 11...100:
+            self = .ElevenToOneHundred
+        case 101...1000:
+            self = .OneHundredAndOneToAThousand
+        case 1001...:
+            self = .MoreThanAThousand
+        default:
+            return nil
+        }
+    }
+}

ElementX/Sources/Services/Analytics/Helpers/UserProperties+Element.swift

@@ -0,0 +1,33 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+import Foundation
+
+public extension AnalyticsEvent.UserProperties {
+    //  Initializer for Element. Strips all Web properties.
+    init(ftueUseCaseSelection: FtueUseCaseSelection?, numFavouriteRooms: Int?, numSpaces: Int?, allChatsActiveFilter: AllChatsActiveFilter?) {
+        self.init(WebMetaSpaceFavouritesEnabled: nil,
+                  WebMetaSpaceHomeAllRooms: nil,
+                  WebMetaSpaceHomeEnabled: nil,
+                  WebMetaSpaceOrphansEnabled: nil,
+                  WebMetaSpacePeopleEnabled: nil,
+                  allChatsActiveFilter: nil,
+                  ftueUseCaseSelection: ftueUseCaseSelection,
+                  numFavouriteRooms: numFavouriteRooms,
+                  numSpaces: numSpaces)
+    }
+}

ElementX/Sources/Services/Analytics/PHGPostHogConfiguration.swift

@@ -0,0 +1,29 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import PostHog
+
+extension PHGPostHogConfiguration {
+    static var standard: PHGPostHogConfiguration? {
+        let analyticsConfiguration = BuildSettings.analyticsConfiguration
+        guard analyticsConfiguration.isEnabled else { return nil }
+        
+        let postHogConfiguration = PHGPostHogConfiguration(apiKey: analyticsConfiguration.apiKey, host: analyticsConfiguration.host)
+        postHogConfiguration.shouldSendDeviceID = false
+        
+        return postHogConfiguration
+    }
+}

ElementX/Sources/Services/Analytics/PostHogAnalyticsClient.swift

@@ -0,0 +1,104 @@
+//
+// Copyright 2021 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+import PostHog
+
+/// An analytics client that reports events to a PostHog server.
+class PostHogAnalyticsClient: AnalyticsClientProtocol {
+    /// The PHGPostHog object used to report events.
+    private var postHog: PHGPostHog?
+    
+    /// Any user properties to be included with the next captured event.
+    private(set) var pendingUserProperties: AnalyticsEvent.UserProperties?
+    
+    var isRunning: Bool { postHog?.enabled ?? false }
+    
+    func start() {
+        // Only start if analytics have been configured in BuildSettings
+        guard let configuration = PHGPostHogConfiguration.standard else { return }
+        
+        if postHog == nil {
+            postHog = PHGPostHog(configuration: configuration)
+        }
+        
+        postHog?.enable()
+    }
+    
+    func identify(id: String) {
+        if let userProperties = pendingUserProperties {
+            // As user properties overwrite old ones, compactMap the dictionary to avoid resetting any missing properties
+            postHog?.identify(id, properties: userProperties.properties.compactMapValues { $0 })
+            pendingUserProperties = nil
+        } else {
+            postHog?.identify(id)
+        }
+    }
+    
+    func reset() {
+        postHog?.reset()
+        pendingUserProperties = nil
+    }
+    
+    func stop() {
+        postHog?.disable()
+        
+        // As of PostHog 1.4.4, setting the client to nil here doesn't release
+        // it. Keep it around to avoid having multiple instances if the user re-enables
+    }
+    
+    func flush() {
+        postHog?.flush()
+    }
+    
+    func capture(_ event: AnalyticsEventProtocol) {
+        postHog?.capture(event.eventName, properties: attachUserProperties(to: event.properties))
+    }
+    
+    func screen(_ event: AnalyticsScreenProtocol) {
+        postHog?.screen(event.screenName.rawValue, properties: attachUserProperties(to: event.properties))
+    }
+    
+    func updateUserProperties(_ userProperties: AnalyticsEvent.UserProperties) {
+        guard let pendingUserProperties = pendingUserProperties else {
+            pendingUserProperties = userProperties
+            return
+        }
+        
+        // Merge the updated user properties with the existing ones
+        self.pendingUserProperties = AnalyticsEvent.UserProperties(ftueUseCaseSelection: userProperties.ftueUseCaseSelection ?? pendingUserProperties.ftueUseCaseSelection,
+                                                                   numFavouriteRooms: userProperties.numFavouriteRooms ?? pendingUserProperties.numFavouriteRooms,
+                                                                   numSpaces: userProperties.numSpaces ?? pendingUserProperties.numSpaces,
+                                                                   allChatsActiveFilter: userProperties.allChatsActiveFilter ?? pendingUserProperties.allChatsActiveFilter)
+    }
+    
+    // MARK: - Private
+    
+    /// Given a dictionary containing properties from an event, this method will return those properties
+    /// with any pending user properties included under the `$set` key.
+    /// - Parameter properties: A dictionary of properties from an event.
+    /// - Returns: The `properties` dictionary with any user properties included.
+    private func attachUserProperties(to properties: [String: Any]) -> [String: Any] {
+        guard isRunning, let userProperties = pendingUserProperties else { return properties }
+        
+        var properties = properties
+        
+        // As user properties overwrite old ones via $set, compactMap the dictionary to avoid resetting any missing properties
+        properties["$set"] = userProperties.properties.compactMapValues { $0 }
+        pendingUserProperties = nil
+        return properties
+    }
+}

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -74,7 +74,7 @@ class ClientProxy: ClientProxyProtocol {
     }
     
     func loadUserDisplayName() async -> Result<String, ClientProxyError> {
-        await Task.detached { () -> Result<String, ClientProxyError> in
+        await Task.detached {
             do {
                 let displayName = try self.client.displayName()
                 return .success(displayName)
@@ -86,7 +86,7 @@ class ClientProxy: ClientProxyProtocol {
     }
         
     func loadUserAvatarURLString() async -> Result<String, ClientProxyError> {
-        await Task.detached { () -> Result<String, ClientProxyError> in
+        await Task.detached {
             do {
                 let avatarURL = try self.client.avatarUrl()
                 return .success(avatarURL)
@@ -97,6 +97,14 @@ class ClientProxy: ClientProxyProtocol {
         .value
     }
     
+    func accountDataEvent<Content>(type: String) async -> Result<Content?, ClientProxyError> where Content: Decodable {
+        .failure(.failedRetrievingAccountData)
+    }
+    
+    func setAccountData<Content: Encodable>(content: Content, type: String) async -> Result<Void, ClientProxyError> {
+        .failure(.failedSettingAccountData)
+    }
+    
     func mediaSourceForURLString(_ urlString: String) -> MatrixRustSDK.MediaSource {
         MatrixRustSDK.mediaSourceFromUrl(url: urlString)
     }

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -26,6 +26,8 @@ enum ClientProxyCallback {
 enum ClientProxyError: Error {
     case failedRetrievingAvatarURL
     case failedRetrievingDisplayName
+    case failedRetrievingAccountData
+    case failedSettingAccountData
     case failedRetrievingSessionVerificationController
     case failedLoadingMedia
 }
@@ -41,6 +43,10 @@ protocol ClientProxyProtocol {
         
     func loadUserAvatarURLString() async -> Result<String, ClientProxyError>
     
+    func accountDataEvent<Content: Decodable>(type: String) async -> Result<Content?, ClientProxyError>
+    
+    func setAccountData<Content: Encodable>(content: Content, type: String) async -> Result<Void, ClientProxyError>
+    
     func mediaSourceForURLString(_ urlString: String) -> MatrixRustSDK.MediaSource
     
     func loadMediaContentForSource(_ source: MatrixRustSDK.MediaSource) throws -> Data

ElementX/Sources/Services/Client/MockClientProxy.swift

@@ -32,6 +32,14 @@ struct MockClientProxy: ClientProxyProtocol {
         .failure(.failedRetrievingAvatarURL)
     }
     
+    func accountDataEvent<Content>(type: String) async -> Result<Content?, ClientProxyError> where Content: Decodable {
+        .failure(.failedRetrievingAccountData)
+    }
+    
+    func setAccountData<Content>(content: Content, type: String) async -> Result<Void, ClientProxyError> where Content: Encodable {
+        .failure(.failedSettingAccountData)
+    }
+    
     func mediaSourceForURLString(_ urlString: String) -> MatrixRustSDK.MediaSource {
         MatrixRustSDK.mediaSourceFromUrl(url: urlString)
     }

ElementX/Sources/Services/Session/MockUserSession.swift

@@ -20,7 +20,7 @@ struct MockUserSession: UserSessionProtocol {
     let callbacks = PassthroughSubject<UserSessionCallback, Never>()
     let sessionVerificationController: SessionVerificationControllerProxyProtocol? = nil
     
-    let userID = "@mock:usersession.com"
+    var userID: String { clientProxy.userIdentifier }
     let clientProxy: ClientProxyProtocol
     let mediaProvider: MediaProviderProtocol
 }

ElementX/SupportingFiles/target.yml

@@ -95,11 +95,13 @@ targets:
     dependencies:
     - package: MatrixRustSDK
     - package: DesignKit
+    - package: AnalyticsEvents
     - package: AppAuth
     - package: DTCoreText
     - package: KeychainAccess
     - package: Kingfisher
     - package: Introspect
+    - package: PostHog
     - package: SwiftyBeaver
     - package: SwiftState
     - package: GZIP

UnitTests/Sources/AnalyticsTests.swift

@@ -0,0 +1,136 @@
+//
+// Copyright 2022 New Vector Ltd
+//
+// 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.
+//
+
+import AnalyticsEvents
+@testable import ElementX
+import XCTest
+
+class AnalyticsTests: XCTestCase {
+    func testAnalyticsPromptNewUser() {
+        // Given a fresh install of the app (without PostHog analytics having been set).
+        ElementSettings.store.removeObject(forKey: ElementSettings.UserDefaultsKeys.enableAnalytics.rawValue)
+        
+        // When the user is prompted for analytics.
+        let showPrompt = Analytics.shared.shouldShowAnalyticsPrompt
+        
+        // Then the prompt should be shown.
+        XCTAssertTrue(showPrompt, "A prompt should be shown for a new user.")
+    }
+    
+    func testAnalyticsPromptUserDeclinedPostHog() {
+        // Given an existing install of the app where the user previously declined PostHog
+        ElementSettings.shared.enableAnalytics = false
+        
+        // When the user is prompted for analytics
+        let showPrompt = Analytics.shared.shouldShowAnalyticsPrompt
+        
+        // Then no prompt should be shown.
+        XCTAssertFalse(showPrompt, "A prompt should not be shown any more.")
+    }
+    
+    func testAnalyticsPromptUserAcceptedPostHog() {
+        // Given an existing install of the app where the user previously accepted PostHog
+        ElementSettings.shared.enableAnalytics = true
+        
+        // When the user is prompted for analytics
+        let showPrompt = Analytics.shared.shouldShowAnalyticsPrompt
+        
+        // Then no prompt should be shown.
+        XCTAssertFalse(showPrompt, "A prompt should not be shown any more.")
+    }
+    
+    func testAddingUserProperties() {
+        // Given a client with no user properties set
+        let client = PostHogAnalyticsClient()
+        XCTAssertNil(client.pendingUserProperties, "No user properties should have been set yet.")
+        
+        // When updating the user properties
+        client.updateUserProperties(AnalyticsEvent.UserProperties(ftueUseCaseSelection: .PersonalMessaging,
+                                                                  numFavouriteRooms: 4,
+                                                                  numSpaces: 5,
+                                                                  allChatsActiveFilter: nil))
+        
+        // Then the properties should be cached
+        XCTAssertNotNil(client.pendingUserProperties, "The user properties should be cached.")
+        XCTAssertEqual(client.pendingUserProperties?.ftueUseCaseSelection, .PersonalMessaging, "The use case selection should match.")
+        XCTAssertEqual(client.pendingUserProperties?.numFavouriteRooms, 4, "The number of favorite rooms should match.")
+        XCTAssertEqual(client.pendingUserProperties?.numSpaces, 5, "The number of spaces should match.")
+    }
+    
+    func testMergingUserProperties() {
+        // Given a client with a cached use case user properties
+        let client = PostHogAnalyticsClient()
+        client.updateUserProperties(AnalyticsEvent.UserProperties(ftueUseCaseSelection: .PersonalMessaging,
+                                                                  numFavouriteRooms: nil,
+                                                                  numSpaces: nil,
+                                                                  allChatsActiveFilter: nil))
+        
+        XCTAssertNotNil(client.pendingUserProperties, "The user properties should be cached.")
+        XCTAssertEqual(client.pendingUserProperties?.ftueUseCaseSelection, .PersonalMessaging, "The use case selection should match.")
+        XCTAssertNil(client.pendingUserProperties?.numFavouriteRooms, "The number of favorite rooms should not be set.")
+        XCTAssertNil(client.pendingUserProperties?.numSpaces, "The number of spaces should not be set.")
+        
+        // When updating the number of spaced
+        client.updateUserProperties(AnalyticsEvent.UserProperties(ftueUseCaseSelection: nil,
+                                                                  numFavouriteRooms: 4,
+                                                                  numSpaces: 5,
+                                                                  allChatsActiveFilter: nil))
+        
+        // Then the new properties should be updated and the existing properties should remain unchanged
+        XCTAssertNotNil(client.pendingUserProperties, "The user properties should be cached.")
+        XCTAssertEqual(client.pendingUserProperties?.ftueUseCaseSelection, .PersonalMessaging, "The use case selection shouldn't have changed.")
+        XCTAssertEqual(client.pendingUserProperties?.numFavouriteRooms, 4, "The number of favorite rooms should have been updated.")
+        XCTAssertEqual(client.pendingUserProperties?.numSpaces, 5, "The number of spaces should have been updated.")
+    }
+    
+    func testSendingUserProperties() {
+        // Given a client with user properties set
+        let client = PostHogAnalyticsClient()
+        client.updateUserProperties(AnalyticsEvent.UserProperties(ftueUseCaseSelection: .PersonalMessaging,
+                                                                  numFavouriteRooms: nil,
+                                                                  numSpaces: nil,
+                                                                  allChatsActiveFilter: nil))
+        client.start()
+        
+        XCTAssertNotNil(client.pendingUserProperties, "The user properties should be cached.")
+        XCTAssertEqual(client.pendingUserProperties?.ftueUseCaseSelection, .PersonalMessaging, "The use case selection should match.")
+        
+        // When sending an event (tests run under Debug configuration so this is sent to the development instance)
+        client.screen(AnalyticsEvent.MobileScreen(durationMs: nil, screenName: .Home))
+        
+        // Then the properties should be cleared
+        XCTAssertNil(client.pendingUserProperties, "The user properties should be cleared.")
+    }
+    
+    func testSendingUserPropertiesWithIdentify() {
+        // Given a client with user properties set
+        let client = PostHogAnalyticsClient()
+        client.updateUserProperties(AnalyticsEvent.UserProperties(ftueUseCaseSelection: .PersonalMessaging,
+                                                                  numFavouriteRooms: nil,
+                                                                  numSpaces: nil,
+                                                                  allChatsActiveFilter: nil))
+        client.start()
+        
+        XCTAssertNotNil(client.pendingUserProperties, "The user properties should be cached.")
+        XCTAssertEqual(client.pendingUserProperties?.ftueUseCaseSelection, .PersonalMessaging, "The use case selection should match.")
+        
+        // When calling identify (tests run under Debug configuration so this is sent to the development instance)
+        client.identify(id: UUID().uuidString)
+        
+        // Then the properties should be cleared
+        XCTAssertNil(client.pendingUserProperties, "The user properties should be cleared.")
+    }
+}

UnitTests/SupportingFiles/target.yml

@@ -49,5 +49,3 @@ targets:
     - path: ../SupportingFiles
     - path: ../../Tools/Scripts/Templates/SimpleScreenExample/Tests/Unit
     - path: ../Resources
-    - path: ../../ElementX/Sources/BuildSettings.swift
-    - path: ../../ElementX/Sources/Screens/RoomScreen/View/Style/TimelineStyle.swift

changelog.d/106.wip

@@ -0,0 +1 @@
+Begin adding the same Analytics used in Element iOS.

project.yml

@@ -37,6 +37,9 @@ packages:
     # path: ../matrix-rust-components-swift
   DesignKit:
     path: ./
+  AnalyticsEvents:
+    url: https://github.com/matrix-org/matrix-analytics-events
+    branch: main
   AppAuth:
     url: https://github.com/openid/AppAuth-iOS
     majorVersion: 1.5.0
@@ -52,6 +55,9 @@ packages:
   Introspect:
     url: https://github.com/siteline/SwiftUI-Introspect
     majorVersion: 0.1.4
+  PostHog:
+    url: https://github.com/PostHog/posthog-ios
+    majorVersion: 1.4.4
   SwiftyBeaver:
     url: https://github.com/SwiftyBeaver/SwiftyBeaver
     majorVersion: 1.9.5