From 971a4f8cc73d78c4833a58582e650d2fa8521ec1 Mon Sep 17 00:00:00 2001
From: Kyriakos Georgiopoulos
 <160638587+Kyriakos-Georgiopoulos@users.noreply.github.com>
Date: Fri, 17 Jan 2025 19:29:05 +0200
Subject: [PATCH 1/2] Update CheckoutLayout.kt

feat(previews): add and optimize ProductScreen previews

- Added new preview functions for the ProductScreen to showcase different UI states.
- Implemented a reusable helper function to centralize common setup logic.
- Simplified individual previews by focusing only on their specific `payUiState`.
- Ensured proper use of `@PreviewParameter` for dynamic description generation.
---
 .../gms/samples/pay/ui/CheckoutLayout.kt      | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/kotlin/app/src/main/java/com/google/android/gms/samples/pay/ui/CheckoutLayout.kt b/kotlin/app/src/main/java/com/google/android/gms/samples/pay/ui/CheckoutLayout.kt
index 7a7774d..62dac99 100644
--- a/kotlin/app/src/main/java/com/google/android/gms/samples/pay/ui/CheckoutLayout.kt
+++ b/kotlin/app/src/main/java/com/google/android/gms/samples/pay/ui/CheckoutLayout.kt
@@ -125,4 +125,64 @@ fun ProductScreen(
             }
         }
     }
+}
+
+/**
+ * Wrapper to simplify previews with a provided description.
+ */
+@Composable
+private fun ProductScreenPreviewWithDescription(
+    payUiState: PaymentUiState,
+    @PreviewParameter(LoremIpsum::class) description: String
+) {
+    ProductScreen(
+        title = "Men's Tech Shell Full-Zip",
+        description = description.take(200), // Limit description to 200 characters
+        price = "$49.99",
+        image = R.drawable.ts_10_11019a,
+        onGooglePayButtonClick = {}, // No-op for previews
+        payUiState = payUiState,
+    )
+}
+
+/**
+ * Preview of ProductScreen in the initial state, where payment has not started.
+ */
+@Preview
+@Composable
+private fun ProductScreenPreviewNotStarted(
+    @PreviewParameter(LoremIpsum::class) description: String
+) {
+    ProductScreenPreviewWithDescription(
+        payUiState = PaymentUiState.NotStarted,
+        description = description
+    )
+}
+
+/**
+ * Preview of ProductScreen when Google Pay is available.
+ */
+@Preview
+@Composable
+private fun ProductScreenPreviewAvailable(
+    @PreviewParameter(LoremIpsum::class) description: String
+) {
+    ProductScreenPreviewWithDescription(
+        payUiState = PaymentUiState.Available,
+        description = description
+    )
+}
+
+/**
+ * Preview of ProductScreen after payment has been completed.
+ */
+@Preview
+@Composable
+private fun ProductScreenPreviewPaymentCompleted(
+    @PreviewParameter(LoremIpsum::class) description: String
+) {
+    ProductScreenPreviewWithDescription(
+        payUiState = PaymentUiState.PaymentCompleted(payerName = "John"),
+        description = description
+    )
 }
\ No newline at end of file

From c6684c1aea59992038ae5b3010ec6d127ea02576 Mon Sep 17 00:00:00 2001
From: Kyriakos Georgiopoulos
 <160638587+Kyriakos-Georgiopoulos@users.noreply.github.com>
Date: Fri, 17 Jan 2025 19:50:02 +0200
Subject: [PATCH 2/2] Update build.gradle.kts

---
 kotlin/app/build.gradle.kts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kotlin/app/build.gradle.kts b/kotlin/app/build.gradle.kts
index 48ae47e..a02fcf2 100644
--- a/kotlin/app/build.gradle.kts
+++ b/kotlin/app/build.gradle.kts
@@ -68,6 +68,7 @@ dependencies {
 
     implementation("androidx.appcompat:appcompat:1.6.1")
     implementation("androidx.activity:activity-compose:1.8.2")
+    debugImplementation("androidx.compose.ui:ui-tooling:1.1.1")
     implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycleVersion")
     implementation("androidx.lifecycle:lifecycle-viewmodel-compose:$lifecycleVersion")
     implementation("androidx.lifecycle:lifecycle-runtime-compose:$lifecycleVersion")