feat: support init SDK with custom configuration (#59)

Package.swift

@@ -30,7 +30,8 @@ let package = Package(
         ),
         .testTarget(
             name: "ClickstreamTests",
-            dependencies: ["Clickstream", .product(name: "Swifter", package: "swifter")]
+            dependencies: ["Clickstream", .product(name: "Swifter", package: "swifter")],
+            resources: [.process("amplifyconfiguration.json")]
         )
     ]
 )

README.md

@@ -20,7 +20,7 @@ The Clickstream SDK supports iOS 13+.
 
 Clickstream requires Xcode 13.4 or higher to build.
 
-**1.Add Package**
+### 1.Add Package
 
 We use **Swift Package Manager** to distribute Clickstream Swift SDK, open your project in Xcode and select **File > Add Pckages**.
 
@@ -30,7 +30,7 @@ Enter the Clickstream Library for Swift GitHub repo URL (`https://github.com/aws
 
 ![](images/add_package_url.png)
 
-**2.Parameter configuration**
+### 2.Parameter configuration
 
 Downlod your `amplifyconfiguration.json` file from your Clickstream solution control plane, and paste it to your project root folder:
 
@@ -62,15 +62,15 @@ Your `appId` and `endpoint` are already set up in it, here's an explanation of e
 - **autoFlushEventsInterval**: event sending interval, the default is `10s`
 - **isTrackAppExceptionEvents**: whether auto track exception event in app, default is `false`
 
-**3.Initialize the SDK**
+### 3.Initialize the SDK
 
 Once you have configured the parameters, you need to initialize it in your app delegate's `application(_:didFinishLaunchingWithOptions:)` lifecycle method:
 
+#### 3.1 Initialize the SDK with default configuration
 ```swift
 import Clickstream
 ...
 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
-    // Override point for customization after application launch.
     do {
         try ClickstreamAnalytics.initSDK()
     } catch {
@@ -80,6 +80,34 @@ func application(_ application: UIApplication, didFinishLaunchingWithOptions lau
 }
 ```
 
+#### 3.2 Initialize the SDK with global attributes and custom configuration
+
+```swift
+import Clickstream
+...
+func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+    do {
+        let configuration = ClickstreamConfiguration()
+            .withAppId("your appId")
+            .withEndpoint("https://example.com/collect")
+            .withLogEvents(true)
+            .withInitialGlobalAttributes([
+                "_traffic_source_name": "Summer promotion",
+                "_traffic_source_medium": "Search engine"
+            ])
+        try ClickstreamAnalytics.initSDK(configuration)
+    } catch {
+        assertionFailure("Fail to initialize ClickstreamAnalytics: \(error)")
+    }
+    return true
+}
+```
+
+By default, we will use the configurations in `amplifyconfiguration.json` file. If you add a custom configuration, the added configuration items will override the default values. 
+
+You can also add all the configuration parameters you need in the `initSDK` method without using the `amplifyconfiguration.json` file.
+
+#### 3.3 SwiftUI configuration
 If your project is developed with SwiftUI, you need to create an application delegate and attach it to your `App` through `UIApplicationDelegateAdaptor`. 
 
 ```swift
@@ -94,24 +122,24 @@ struct YourApp: App {
 }
 ```
 
-You also need to disable swzzling by setting `configuration.isTrackScreenViewEvents = false`, see the next configuration steps.
+Clickstream Swift SDK depends on method swizzling to automatically record screen views. SwiftUI apps must [record screen view events manually](#record-screen-view-events-manually), and disable automatic tracking of screen view events by setting `configuration.withTrackScreenViewEvents(false)` when the SDK is initialized.
 
-**4.Configure the SDK**
+### 4. Update Configuration
 
 ```swift
 import Clickstream
 
-// config the sdk after initialize.
+// configure the sdk after initialize.
 do {
-    var configuration = try ClickstreamAnalytics.getClickstreamConfiguration()
-    configuration.appId = "appId"
-    configuration.endpoint = "https://example.com/collect"
-    configuration.authCookie = "your authentication cookie"
-    configuration.sessionTimeoutDuration = 1800000
-    configuration.isTrackScreenViewEvents = true
-    configuration.isTrackUserEngagementEvents = true
-    configuration.isLogEvents = true
-    configuration.isCompressEvents = true
+    let configuration = try ClickstreamAnalytics.getClickstreamConfiguration()
+    configuration.withAppId("your appId")
+        .withEndpoint("https://example.com/collect")
+        .withLogEvents(true)
+        .withCompressEvents(true)
+        .withSessionTimeoutDuration(1800000)
+        .withTrackAppExceptionEvents(true)
+        .withTrackScreenViewEvents(true)
+        .withTrackUserEngagementEvents(true)
 } catch {
     print("Failed to config ClickstreamAnalytics: \(error)")
 }
@@ -136,7 +164,7 @@ let attributes: ClickstreamAttribute = [
 ]
 ClickstreamAnalytics.recordEvent("testEvent", attributes)
 
-// for record an event directly
+// for record an event with event name
 ClickstreamAnalytics.recordEvent("button_click")
 ```
 

Sources/Clickstream/AWSClickstreamPlugin+Configure.swift

@@ -26,15 +26,10 @@ extension AWSClickstreamPlugin {
     }
 
     /// Configure AWSClickstreamPlugin programatically using AWSClickstreamConfiguration
-    func configure(using configuration: AWSClickstreamConfiguration) throws {
-        let contextConfiguration = ClickstreamContextConfiguration(appId: configuration.appId,
-                                                                   endpoint: configuration.endpoint,
-                                                                   sendEventsInterval: configuration.sendEventsInterval,
-                                                                   isTrackAppExceptionEvents:
-                                                                   configuration.isTrackAppExceptionEvents,
-                                                                   isCompressEvents: configuration.isCompressEvents)
-        clickstream = try ClickstreamContext(with: contextConfiguration)
+    func configure(using amplifyConfigure: AWSClickstreamConfiguration) throws {
+        try mergeConfiguration(amplifyConfigure: amplifyConfigure)
 
+        clickstream = try ClickstreamContext(with: configuration)
         let sessionClient = SessionClient(clickstream: clickstream)
         clickstream.sessionClient = sessionClient
         let eventRecorder = try EventRecorder(clickstream: clickstream)
@@ -61,6 +56,7 @@ extension AWSClickstreamPlugin {
             autoFlushEventsTimer: autoFlushEventsTimer,
             networkMonitor: networkMonitor
         )
+        initGlobalAttributes()
         log.debug("initialize Clickstream SDK successful")
         sessionClient.handleAppStart()
     }
@@ -82,4 +78,79 @@ extension AWSClickstreamPlugin {
             )
         )
     }
+
+    /// Internal method to merge the configurations
+    func mergeConfiguration(amplifyConfigure: AWSClickstreamConfiguration) throws {
+        let defaultConfiguration = ClickstreamConfiguration.getDefaultConfiguration()
+        if (configuration.appId.isNilOrEmpty() && amplifyConfigure.appId.isEmpty) ||
+            (configuration.endpoint.isNilOrEmpty() && amplifyConfigure.endpoint.isEmpty)
+        {
+            throw ConfigurationError.unableToDecode(
+                "Configuration Error: `appId` and `endpoint` are required", """
+                Ensure they are correctly set in `amplifyconfiguration.json`\
+                or provided during SDK initialization with `initSDK()`
+                """
+            )
+        }
+
+        if configuration.appId.isNilOrEmpty() {
+            defaultConfiguration.appId = amplifyConfigure.appId
+        } else {
+            defaultConfiguration.appId = configuration.appId
+        }
+        if configuration.endpoint.isNilOrEmpty() {
+            defaultConfiguration.endpoint = amplifyConfigure.endpoint
+        } else {
+            defaultConfiguration.endpoint = configuration.endpoint
+        }
+        if configuration.sendEventsInterval > 0 {
+            defaultConfiguration.sendEventsInterval = configuration.sendEventsInterval
+        } else if amplifyConfigure.sendEventsInterval > 0 {
+            defaultConfiguration.sendEventsInterval = amplifyConfigure.sendEventsInterval
+        }
+        if configuration.isTrackAppExceptionEvents != nil {
+            defaultConfiguration.isTrackAppExceptionEvents = configuration.isTrackAppExceptionEvents
+        } else if amplifyConfigure.isTrackAppExceptionEvents != nil {
+            defaultConfiguration.isTrackAppExceptionEvents = amplifyConfigure.isTrackAppExceptionEvents
+        }
+        if configuration.isCompressEvents != nil {
+            defaultConfiguration.isCompressEvents = configuration.isCompressEvents
+        } else if amplifyConfigure.isCompressEvents != nil {
+            defaultConfiguration.isCompressEvents = amplifyConfigure.isCompressEvents
+        }
+
+        mergeDefaultConfiguration(defaultConfiguration)
+        configuration = defaultConfiguration
+    }
+
+    /// Internal method to merge the default configurations
+    func mergeDefaultConfiguration(_ defaultConfiguration: ClickstreamConfiguration) {
+        if let isTrackScreenViewEvents = configuration.isTrackScreenViewEvents {
+            defaultConfiguration.isTrackScreenViewEvents = isTrackScreenViewEvents
+        }
+        if let isTrackUserEngagementEvents = configuration.isTrackUserEngagementEvents {
+            defaultConfiguration.isTrackUserEngagementEvents = isTrackUserEngagementEvents
+        }
+        if let isLogEvents = configuration.isLogEvents {
+            defaultConfiguration.isLogEvents = isLogEvents
+        }
+        if configuration.sessionTimeoutDuration > 0 {
+            defaultConfiguration.sessionTimeoutDuration = configuration.sessionTimeoutDuration
+        }
+        if configuration.authCookie != nil {
+            defaultConfiguration.authCookie = configuration.authCookie
+        }
+        if configuration.globalAttributes != nil {
+            defaultConfiguration.globalAttributes = configuration.globalAttributes
+        }
+    }
+
+    /// Internal method to add global attributes
+    func initGlobalAttributes() {
+        if let globalAttributes = configuration.globalAttributes {
+            for (key, value) in globalAttributes {
+                analyticsClient.addGlobalAttribute(value, forKey: key)
+            }
+        }
+    }
 }

Sources/Clickstream/AWSClickstreamPlugin.swift

@@ -28,6 +28,10 @@ final class AWSClickstreamPlugin: AnalyticsCategoryPlugin {
         "awsClickstreamPlugin"
     }
 
+    var configuration: ClickstreamConfiguration
+
     /// Instantiates an instance of the AWSClickstreamPlugin
-    init() {}
+    init(_ configuration: ClickstreamConfiguration? = nil) {
+        self.configuration = configuration ?? ClickstreamConfiguration()
+    }
 }

Sources/Clickstream/ClickstreamAnalytics.swift

@@ -6,13 +6,14 @@
 //
 
 import Amplify
+import Foundation
 
 /// ClickstreamAnalytics api for swift
 public enum ClickstreamAnalytics {
     /// Init ClickstreamAnalytics
-    public static func initSDK() throws {
-        try Amplify.add(plugin: AWSClickstreamPlugin())
-        try Amplify.configure()
+    public static func initSDK(_ configuration: ClickstreamConfiguration? = nil) throws {
+        try Amplify.add(plugin: AWSClickstreamPlugin(configuration))
+        try Amplify.configure(getAmplifyConfigurationSafely())
     }
 
     /// Use this method to record event
@@ -70,7 +71,7 @@ public enum ClickstreamAnalytics {
 
     /// Get Clickstream configuration, please config it after initialize sdk
     /// - Returns: ClickstreamContextConfiguration to modify the configuration of clickstream sdk
-    public static func getClickstreamConfiguration() throws -> ClickstreamContextConfiguration {
+    public static func getClickstreamConfiguration() throws -> ClickstreamConfiguration {
         let plugin = try Amplify.Analytics.getPlugin(for: "awsClickstreamPlugin")
         // swiftlint:disable force_cast
         return (plugin as! AWSClickstreamPlugin).getEscapeHatch().configuration
@@ -89,6 +90,22 @@ public enum ClickstreamAnalytics {
         Amplify.Analytics.enable()
     }
 
+    static func getAmplifyConfigurationSafely(_ bundle: Bundle = Bundle.main) throws -> AmplifyConfiguration {
+        guard let path = bundle.path(forResource: "amplifyconfiguration", ofType: "json") else {
+            log.debug("Could not load default `amplifyconfiguration.json` file")
+            let plugins: [String: JSONValue] = [
+                "awsClickstreamPlugin": [
+                    "appId": JSONValue.string(""),
+                    "endpoint": JSONValue.string("")
+                ]
+            ]
+            let analyticsConfiguration = AnalyticsCategoryConfiguration(plugins: plugins)
+            return AmplifyConfiguration(analytics: analyticsConfiguration)
+        }
+        let url = URL(fileURLWithPath: path)
+        return try AmplifyConfiguration(configurationFile: url)
+    }
+
     /// ClickstreamAnalytics preset events
     public enum EventName {
         public static let SCREEN_VIEW = "_screen_view"
@@ -133,3 +150,5 @@ public enum ClickstreamAnalytics {
         public static let ITEM_CATEGORY5 = "item_category5"
     }
 }
+
+extension ClickstreamAnalytics: ClickstreamLogger {}

Sources/Clickstream/ClickstreamObjc.swift

@@ -20,6 +20,11 @@ import Foundation
         try ClickstreamAnalytics.initSDK()
     }
 
+    /// Init the Clickstream sdk
+    public static func initSDK(_ configuration: ClickstreamConfiguration) throws {
+        try ClickstreamAnalytics.initSDK(configuration)
+    }
+
     /// Use this method to record event
     /// - Parameter eventName: the event name
     public static func recordEvent(_ eventName: String) {
@@ -76,7 +81,7 @@ import Foundation
 
     /// Get Clickstream configuration, please config it after initialize sdk
     /// - Returns: ClickstreamContextConfiguration to modify the configuration of clickstream sdk
-    public static func getClickstreamConfiguration() throws -> ClickstreamContextConfiguration {
+    public static func getClickstreamConfiguration() throws -> ClickstreamConfiguration {
         try ClickstreamAnalytics.getClickstreamConfiguration()
     }