add PublicEventService

src/main/kotlin/ltd/hlaeja/service/PublicEventService.kt

@@ -0,0 +1,25 @@
+package ltd.hlaeja.service
+
+import io.github.oshai.kotlinlogging.KotlinLogging
+import ltd.hlaeja.entity.AccountEntity
+import ltd.hlaeja.library.accountRegistry.event.AccountMessage
+import org.springframework.kafka.core.KafkaTemplate
+import org.springframework.stereotype.Service
+import reactor.core.publisher.Mono
+
+private val log = KotlinLogging.logger {}
+
+@Service
+class PublicEventService(
+    private val kafkaTemplate: KafkaTemplate<String, AccountMessage>,
+) {
+
+    fun updateAccount(
+        account: AccountEntity,
+        changes: List<String>,
+    ): Mono<AccountEntity> = Mono
+        .fromFuture(kafkaTemplate.send("account", "change", AccountMessage(account.id!!, changes)))
+        .doOnSuccess { log.trace { "Sent Kafka created event for user ${account.id}" } }
+        .doOnError { e -> log.error(e) { "Failed to send Kafka event" } }
+        .thenReturn(account)
+}