Add UseCase abstraction

michal-kowalcze · Oct 24, 2021 · 006811b · 006811b
1 parent 80d7b85
commit 006811b
Show file tree

Hide file tree

Showing 7 changed files with 18 additions and 14 deletions.
diff --git a/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/api/GetScheduleEndpoint.kt b/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/api/GetScheduleEndpoint.kt
@@ -16,7 +16,7 @@ class GetScheduleEndpoint(private val getScheduleUseCase: GetScheduleUseCase) {
         // convert to domain model
         val scheduleDay = LocalDate.parse(localDate)
         // execute domain action
-        val daySchedule = getScheduleUseCase.getSchedule(scheduleDay)
+        val daySchedule = getScheduleUseCase.apply(scheduleDay)
         // convert to API
         val dayScheduleDto = daySchedule.toApi()
 

diff --git a/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/api/ReserveSlotEndpoint.kt b/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/api/ReserveSlotEndpoint.kt
@@ -16,7 +16,7 @@ class ReserveSlotEndpoint(private val reserveSlotUseCase: ReserveSlotUseCase) {
         // convert to domain model
         val slotId = SlotId(LocalDate.parse(localDate), index)
         // execute domain action
-        val daySchedule = reserveSlotUseCase.reserve(slotId)
+        val daySchedule = reserveSlotUseCase.apply(slotId)
         // convert to API
         val dayScheduleDto = daySchedule.toApi()
 

diff --git a/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/GetScheduleUseCase.kt b/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/GetScheduleUseCase.kt
@@ -8,15 +8,15 @@ import java.time.LocalDate
 class GetScheduleUseCase(
     private val daySchedulerRepository: DayScheduleRepository,
     private val dayScheduleCreator: DayScheduleCreator,
-) {
+) : UseCase<LocalDate, DaySchedule> {
 
-    fun getSchedule(scheduleDay: LocalDate): DaySchedule {
-        val daySchedule = daySchedulerRepository.get(scheduleDay)
+    override fun apply(input: LocalDate): DaySchedule {
+        val daySchedule = daySchedulerRepository.get(input)
         if (daySchedule != null) {
             return daySchedule
         }
 
-        val newSchedule = dayScheduleCreator.create(scheduleDay)
+        val newSchedule = dayScheduleCreator.create(input)
         return daySchedulerRepository.save(newSchedule)
     }
 }

diff --git a/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/ReserveSlotUseCase.kt b/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/ReserveSlotUseCase.kt
@@ -7,12 +7,12 @@ import eu.kowalcze.michal.arch.clean.example.domain.repository.DayScheduleReposi
 class ReserveSlotUseCase(
     private val dayScheduleRepository: DayScheduleRepository,
     private val getScheduleUseCase: GetScheduleUseCase,
-) {
+) : UseCase<SlotId, DaySchedule> {
 
-    fun reserve(slotId: SlotId): DaySchedule {
-        val daySchedule = getScheduleUseCase.getSchedule(scheduleDay = slotId.day)
+    override fun apply(input: SlotId): DaySchedule {
+        val daySchedule = getScheduleUseCase.apply(input = input.day)
 
-        val modifiedSchedule = daySchedule.reserveSlot(slotId.index)
+        val modifiedSchedule = daySchedule.reserveSlot(input.index)
 
         return dayScheduleRepository.save(modifiedSchedule)
     }

diff --git a/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/UseCase.kt b/src/main/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/UseCase.kt
@@ -0,0 +1,5 @@
+package eu.kowalcze.michal.arch.clean.example.domain.usecase
+
+interface UseCase<INPUT, OUTPUT> {
+    fun apply(input: INPUT): OUTPUT
+}
diff --git a/...est/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/GetScheduleUseCaseTest.kt b/...est/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/GetScheduleUseCaseTest.kt
@@ -2,7 +2,6 @@ package eu.kowalcze.michal.arch.clean.example.domain.usecase
 
 import eu.kowalcze.michal.arch.clean.example.domain.model.DaySchedule
 import eu.kowalcze.michal.arch.clean.example.domain.model.DayScheduleCreator
-import eu.kowalcze.michal.arch.clean.example.domain.repository.DayScheduleRepository
 import eu.kowalcze.michal.arch.clean.example.infrastructure.InMemoryDayScheduleRepository
 import io.kotest.matchers.shouldBe
 import io.kotest.matchers.types.shouldBeSameInstanceAs
@@ -33,7 +32,7 @@ internal class GetScheduleUseCaseTest {
         daySchedulerRepository.save(givenSchedule)
 
         // when
-        val schedule = getScheduleUseCase.getSchedule(today)
+        val schedule = getScheduleUseCase.apply(today)
 
         // then
         schedule shouldBeSameInstanceAs givenSchedule
@@ -50,7 +49,7 @@ internal class GetScheduleUseCaseTest {
         every { dayScheduleCreator.create(today) }.returns(givenSchedule)
 
         // when
-        val schedule = getScheduleUseCase.getSchedule(today)
+        val schedule = getScheduleUseCase.apply(today)
 
         // then
         schedule shouldBeSameInstanceAs givenSchedule

diff --git a/...est/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/ReserveSlotUseCaseTest.kt b/...est/kotlin/eu/kowalcze/michal/arch/clean/example/domain/usecase/ReserveSlotUseCaseTest.kt
@@ -37,7 +37,7 @@ internal class ReserveSlotUseCaseTest {
         every { dayScheduleCreator.create(today) }.returns(givenSchedule)
 
         // when
-        val daySchedule = reserveSlotUseCase.reserve(SlotId(today, index = 0))
+        val daySchedule = reserveSlotUseCase.apply(SlotId(today, index = 0))
 
         // then
         daySchedule.slots[0].reserved shouldBe true