feature: init kotlin compose multiplatforme

backend/src/main/kotlin/eventDemo/libs/bus/BusInMemory.kt

@@ -0,0 +1,31 @@
+package eventDemo.libs.bus
+
+import io.github.oshai.kotlinlogging.KotlinLogging
+import io.github.oshai.kotlinlogging.withLoggingContext
+import kotlin.reflect.KClass
+
+class BusInMemory<E>(
+  val name: KClass<*> = BusInMemory::class,
+) : Bus<E> {
+  private val logger = KotlinLogging.logger(name.qualifiedName.toString())
+  private val subscribers: MutableList<(E) -> Unit> = mutableListOf()
+
+  override fun publish(item: E) {
+    withLoggingContext("busItem" to item.toString()) {
+      logger.info { "Item sent to the bus" }
+      subscribers
+        .forEach {
+          it(item)
+        }
+    }
+  }
+
+  override fun subscribe(block: (E) -> Unit): Bus.Subscription {
+    subscribers.add(block)
+    return object : Bus.Subscription {
+      override fun close() {
+        subscribers.remove(block)
+      }
+    }
+  }
+}