Add addType to TypeService

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

@@ -3,7 +3,13 @@ package ltd.hlaeja.service
 import kotlinx.coroutines.flow.Flow
 import ltd.hlaeja.entity.TypeEntity
 import ltd.hlaeja.repository.TypeRepository
+import mu.KotlinLogging
+import org.springframework.dao.DuplicateKeyException
+import org.springframework.http.HttpStatus
 import org.springframework.stereotype.Service
+import org.springframework.web.server.ResponseStatusException
+
+private val log = KotlinLogging.logger {}
 
 @Service
 class TypeService(
@@ -11,4 +17,14 @@ class TypeService(
 ) {
 
     fun getTypes(): Flow<TypeEntity> = typeRepository.findAll()
+
+    suspend fun addType(
+        entity: TypeEntity,
+    ): TypeEntity = try {
+        typeRepository.save(entity)
+            .also { log.debug("Added new type: {}", it.id) }
+    } catch (e: DuplicateKeyException) {
+        log.warn(e.localizedMessage)
+        throw ResponseStatusException(HttpStatus.CONFLICT)
+    }
 }