Add PixelKit source parameter

DuckDuckGo/NetworkProtection/NetworkExtensionTargets/NetworkExtensionTargets/MacPacketTunnelProvider.swift

@@ -379,8 +379,17 @@ final class MacPacketTunnelProvider: PacketTunnelProvider {
         dryRun = false
 #endif
 
+        let source: String
+
+#if NETP_SYSTEM_EXTENSION
+        source = "vpnSystemExtension"
+#else
+        source = "vpnAppExtension"
+#endif
+
         PixelKit.setUp(dryRun: dryRun,
                        appVersion: AppVersion.shared.versionNumber,
+                       source: source,
                        defaultHeaders: defaultHeaders,
                        log: .networkProtectionPixel,
                        defaults: .netP) { (pixelName: String, headers: [String: String], parameters: [String: String], _, _, onComplete: @escaping PixelKit.CompletionBlock) in

DuckDuckGoDBPBackgroundAgent/DuckDuckGoDBPBackgroundAgentAppDelegate.swift

@@ -41,6 +41,7 @@ final class DuckDuckGoDBPBackgroundAgentApplication: NSApplication {
 
         PixelKit.setUp(dryRun: dryRun,
                        appVersion: AppVersion.shared.versionNumber,
+                       source: nil,
                        defaultHeaders: [:],
                        log: .dbpBackgroundAgentPixel,
                        defaults: .standard) { (pixelName: String, headers: [String: String], parameters: [String: String], _, _, onComplete: @escaping (Bool, Error?) -> Void) in

DuckDuckGoVPN/DuckDuckGoVPNAppDelegate.swift

@@ -173,7 +173,12 @@ final class DuckDuckGoVPNAppDelegate: NSObject, NSApplicationDelegate {
         dryRun = false
 #endif
 
-        PixelKit.setUp(dryRun: dryRun, appVersion: AppVersion.shared.versionNumber, defaultHeaders: [:], log: .networkProtectionPixel, defaults: .netP) { (pixelName: String, headers: [String: String], parameters: [String: String], _, _, onComplete: @escaping PixelKit.CompletionBlock) in
+        PixelKit.setUp(dryRun: dryRun,
+                       appVersion: AppVersion.shared.versionNumber,
+                       source: "vpnAgent",
+                       defaultHeaders: [:],
+                       log: .networkProtectionPixel,
+                       defaults: .netP) { (pixelName: String, headers: [String: String], parameters: [String: String], _, _, onComplete: @escaping PixelKit.CompletionBlock) in
 
             let url = URL.pixelUrl(forPixelNamed: pixelName)
             let apiHeaders = APIRequest.Headers(additionalHeaders: headers) // workaround - Pixel class should really handle APIRequest.Headers by itself

LocalPackages/PixelKit/Sources/PixelKit/PixelKit+Parameters.swift

@@ -24,6 +24,7 @@ public extension PixelKit {
         public static let duration = "duration"
         public static let test = "test"
         public static let appVersion = "appVersion"
+        public static let pixelSource = "pixelSource"
         public static let osMajorVersion = "osMajorVersion"
 
         public static let errorCode = "e"

LocalPackages/PixelKit/Sources/PixelKit/PixelKit.swift

@@ -87,21 +87,39 @@ public final class PixelKit {
     private let log: OSLog
     private let fireRequest: FireRequest
 
-    /// `dryRun`: if `true`, simulate requests and "send" them at an accelerated rate (once every 2 minutes instead of once a day)
-    /// `fireRequest`: this is not triggered when `dryRun` is `true`
-    public static func setUp(dryRun: Bool = false, appVersion: String, defaultHeaders: [String: String], log: OSLog, defaults: UserDefaults, fireRequest: @escaping FireRequest) {
-        shared = PixelKit(dryRun: dryRun, appVersion: appVersion, defaultHeaders: defaultHeaders, log: log, defaults: defaults, fireRequest: fireRequest)
+    /// Sets up PixelKit for the entire app.
+    ///
+    /// - Parameters:
+    /// - `dryRun`: if `true`, simulate requests and "send" them at an accelerated rate (once every 2 minutes instead of once a day)
+    /// - `source`: if set, adds a `pixelSource` parameter to the pixel call; this can be used to specify which target is sending the pixel
+    /// - `fireRequest`: this is not triggered when `dryRun` is `true`
+    public static func setUp(dryRun: Bool = false,
+                             appVersion: String,
+                             source: String? = nil,
+                             defaultHeaders: [String: String],
+                             log: OSLog,
+                             defaults: UserDefaults,
+                             fireRequest: @escaping FireRequest) {
+        shared = PixelKit(dryRun: dryRun,
+                          appVersion: appVersion,
+                          source: source,
+                          defaultHeaders: defaultHeaders,
+                          log: log,
+                          defaults: defaults,
+                          fireRequest: fireRequest)
     }
 
     static func tearDown() {
         shared = nil
     }
 
     private var dryRun: Bool
+    private let source: String?
     private let pixelCalendar: Calendar
 
     init(dryRun: Bool,
          appVersion: String,
+         source: String? = nil,
          defaultHeaders: [String: String],
          log: OSLog,
          dailyPixelCalendar: Calendar? = nil,
@@ -111,6 +129,7 @@ public final class PixelKit {
 
         self.dryRun = dryRun
         self.appVersion = appVersion
+        self.source = source
         self.defaultHeaders = defaultHeaders
         self.log = log
         self.pixelCalendar = dailyPixelCalendar ?? Self.defaultDailyPixelCalendar
@@ -119,6 +138,7 @@ public final class PixelKit {
         self.fireRequest = fireRequest
     }
 
+    // swiftlint:disable:next cyclomatic_complexity
     private func fire(pixelNamed pixelName: String,
                       frequency: Frequency,
                       withHeaders headers: [String: String]?,
@@ -134,6 +154,10 @@ public final class PixelKit {
             newParams[Parameters.appVersion] = appVersion
         }
 
+        if let source {
+            newParams[Parameters.pixelSource] = source
+        }
+
         if let error {
             newParams.appendErrorPixelParams(error: error)
         }