Add convenience methods for sending purchase preset signals

TelemetryDeck · May 18, 2024 · 2b837c2 · 2b837c2
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diff --git a/...etryClient/Presets/TelemetryDeckExt.swift → ...Client/Presets/TelemetryDeck+Errors.swift b/...etryClient/Presets/TelemetryDeckExt.swift → ...Client/Presets/TelemetryDeck+Errors.swift
diff --git a/Sources/TelemetryClient/Presets/TelemetryDeck+Purchases.swift b/Sources/TelemetryClient/Presets/TelemetryDeck+Purchases.swift
@@ -0,0 +1,38 @@
+#if canImport(StoreKit)
+import StoreKit
+import Foundation
+
+@available(iOS 15, macOS 12, tvOS 15, visionOS 1, watchOS 8, *)
+extension TelemetryDeck {
+    public static func purchaseCompleted(
+        transaction: StoreKit.Transaction,
+        parameters: [String: String] = [:],
+        customUserID: String? = nil
+    ) {
+        let priceValueInNativeCurrency = NSDecimalNumber(decimal: transaction.price ?? Decimal()).doubleValue
+
+        let priceValueInUSD: Double
+        if transaction.currency == Locale.Currency("USD") {
+            priceValueInUSD = priceValueInNativeCurrency
+        } else {
+            priceValueInUSD = priceValueInNativeCurrency * 1.0  // TODO: implement hard-coded lookup table
+        }
+
+        var purchaseParameters: [String: String] = [
+            "TelemetryDeck.Purchase.type": transaction.subscriptionGroupID != nil ? "subscription" : "one-time-purchase",
+            "TelemetryDeck.Purchase.countryCode": transaction.storefront.countryCode,
+        ]
+
+        if let currency = transaction.currency {
+            purchaseParameters["TelemetryDeck.Purchase.currencyCode"] = currency.identifier
+        }
+
+        self.signal(
+            "TelemetryDeck.Purchase.completed",
+            parameters: purchaseParameters.merging(parameters) { $1 },
+            floatValue: priceValueInUSD,
+            customUserID: customUserID
+        )
+    }
+}
+#endif