From 99cc49d7581d7ac46e54ded24c2129bb7a629120 Mon Sep 17 00:00:00 2001
From: InsanusMokrassar <ovsyannikov.alexey95@gmail.com>
Date: Wed, 12 Aug 2020 13:58:00 +0600
Subject: [PATCH] optionalContextual

---
 CHANGELOG.md                                  |  1 +
 .../sdi/utils/OptionalContextualIncluding.kt  | 21 +++++++++++++++++++
 2 files changed, 22 insertions(+)
 create mode 100644 src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/OptionalContextualIncluding.kt

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fc8b83..4c47d4e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@
 ### 0.3.1
 
 * `Kotlin`: `1.3.71` -> `1.3.72`
+* Add `SerializersModuleBuilder#optionalContextual` for more comfortable usage of `contextual`
 
 ## 0.2.0
 
diff --git a/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/OptionalContextualIncluding.kt b/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/OptionalContextualIncluding.kt
new file mode 100644
index 0000000..085aa46
--- /dev/null
+++ b/src/commonMain/kotlin/com/insanusmokrassar/sdi/utils/OptionalContextualIncluding.kt
@@ -0,0 +1,21 @@
+package com.insanusmokrassar.sdi.utils
+
+import kotlinx.serialization.InternalSerializationApi
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.modules.*
+import kotlin.reflect.KClass
+
+@InternalSerializationApi
+fun <T : Any> SerializersModuleBuilder.optionalContextual(
+    kClass: KClass<T>, kSerializer: KSerializer<T>
+) = try {
+    contextual(kClass, kSerializer)
+    true
+} catch (e: SerializerAlreadyRegisteredException) {
+    false
+}
+
+@InternalSerializationApi
+inline fun <reified T : Any> SerializersModuleBuilder.optionalContextual(
+    kSerializer: KSerializer<T>
+) = optionalContextual(T::class, kSerializer)
\ No newline at end of file