add klock in common and DateTimeSerializer

common/build.gradle

@@ -8,6 +8,11 @@ apply from: "$mppJvmJsAndroidLinuxMingwLinuxArm64ProjectPresetPath"
 
 kotlin {
     sourceSets {
+        commonMain {
+            dependencies {
+                api libs.klock
+            }
+        }
         jvmMain {
             dependencies {
                 api project(":micro_utils.coroutines")

common/src/commonMain/kotlin/dev/inmo/micro_utils/common/DateTimeSerializer.kt

@@ -0,0 +1,23 @@
+package dev.inmo.micro_utils.common
+
+import korlibs.time.DateTime
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.Serializer
+import kotlinx.serialization.builtins.serializer
+import kotlinx.serialization.descriptors.SerialDescriptor
+import kotlinx.serialization.encoding.Decoder
+import kotlinx.serialization.encoding.Encoder
+
+@Serializer(DateTime::class)
+object DateTimeSerializer : KSerializer<DateTime> {
+    override val descriptor: SerialDescriptor
+        get() = Double.serializer().descriptor
+
+    override fun deserialize(decoder: Decoder): DateTime {
+        return DateTime(decoder.decodeDouble())
+    }
+
+    override fun serialize(encoder: Encoder, value: DateTime) {
+        encoder.encodeDouble(value.unixMillis)
+    }
+}