MARA-18 : 식재료 CRUD 구현 (#9)

* 식재료(Ingredient) 껍데기 구현

* 식재료 생성 기능 구현

* 식재료 조회 기능 구현

* 식재료 업데이트 기능 구현

* 식재료 삭제 기능 구현

* 식재료 전체 조회 기능 구현

* ktlint 적용

* Request, Response -> DTO 통합

* ingredientId var -> val 변경

src/main/kotlin/mara/server/domain/ingredient/Ingredient.kt

@@ -0,0 +1,25 @@
+package mara.server.domain.ingredient
+
+import jakarta.persistence.Entity
+import jakarta.persistence.GeneratedValue
+import jakarta.persistence.GenerationType
+import jakarta.persistence.Id
+
+@Entity
+class Ingredient(
+    var category: String,
+    var name: String,
+    var iconImage: String,
+    var expirationDays: Int = 0
+) {
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val ingredientId: Long = 0L
+
+    fun update(ingredientRequest: IngredientRequest) {
+        this.category = ingredientRequest.category
+        this.name = ingredientRequest.name
+        this.iconImage = ingredientRequest.iconImage
+        this.expirationDays = ingredientRequest.expirationDays
+    }
+}

src/main/kotlin/mara/server/domain/ingredient/IngredientController.kt

@@ -0,0 +1,47 @@
+package mara.server.domain.ingredient
+
+import mara.server.common.CommonResponse
+import mara.server.common.success
+import org.springframework.web.bind.annotation.DeleteMapping
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.PutMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/ingrs")
+class IngredientController(
+    private val ingredientService: IngredientService
+) {
+
+    @PostMapping
+    fun createIngredient(@RequestBody ingredientRequest: IngredientRequest): CommonResponse<Long> {
+        return success(ingredientService.createIngredient(ingredientRequest))
+    }
+
+    @GetMapping("/{id}")
+    fun getIngredient(@PathVariable(name = "id") id: Long): CommonResponse<IngredientResponse> {
+        return success(ingredientService.getIngredient(id))
+    }
+
+    @GetMapping
+    fun getIngredientList(): CommonResponse<List<IngredientResponse>> {
+        return success(ingredientService.getIngredientList())
+    }
+
+    @PutMapping("/{id}")
+    fun updateIngredient(
+        @PathVariable(name = "id") id: Long,
+        @RequestBody ingredientRequest: IngredientRequest
+    ): CommonResponse<IngredientResponse> {
+        return success(ingredientService.updateIngredient(id, ingredientRequest))
+    }
+
+    @DeleteMapping("/{id}")
+    fun deleteIngredient(@PathVariable(name = "id") id: Long): CommonResponse<String> {
+        return success(ingredientService.deleteIngredient(id))
+    }
+}

src/main/kotlin/mara/server/domain/ingredient/IngredientDto.kt

@@ -0,0 +1,28 @@
+package mara.server.domain.ingredient
+
+data class IngredientRequest(
+    val category: String,
+    val name: String,
+    val iconImage: String,
+    val expirationDays: Int
+)
+
+data class IngredientResponse(
+    val ingredientId: Long,
+    val category: String,
+    val name: String,
+    val iconImage: String,
+    val expirationDays: Int
+) {
+    constructor(ingredient: Ingredient) : this(
+        ingredientId = ingredient.ingredientId,
+        category = ingredient.category,
+        name = ingredient.name,
+        iconImage = ingredient.iconImage,
+        expirationDays = ingredient.expirationDays
+    )
+}
+
+fun List<Ingredient>.toIngredientResponseList(): List<IngredientResponse> {
+    return this.map { IngredientResponse(it) }
+}

src/main/kotlin/mara/server/domain/ingredient/IngredientRepository.kt

@@ -0,0 +1,7 @@
+package mara.server.domain.ingredient
+
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.stereotype.Repository
+
+@Repository
+interface IngredientRepository : JpaRepository<Ingredient, Long>

src/main/kotlin/mara/server/domain/ingredient/IngredientService.kt

@@ -0,0 +1,40 @@
+package mara.server.domain.ingredient
+
+import org.springframework.stereotype.Service
+
+@Service
+class IngredientService(
+    private val ingredientRepository: IngredientRepository
+) {
+
+    fun createIngredient(ingredientRequest: IngredientRequest): Long {
+        val ingredient = Ingredient(
+            category = ingredientRequest.category,
+            name = ingredientRequest.name,
+            iconImage = ingredientRequest.iconImage,
+            expirationDays = ingredientRequest.expirationDays
+        )
+        return ingredientRepository.save(ingredient).ingredientId
+    }
+
+    fun getIngredient(id: Long): IngredientResponse {
+        val ingredient = ingredientRepository.findById(id).orElseThrow { NoSuchElementException("해당 식재료가 존재하지 않습니다. ID: $id") }
+        return IngredientResponse(ingredient)
+    }
+
+    fun getIngredientList(): List<IngredientResponse> {
+        val ingredientList = ingredientRepository.findAll()
+        return ingredientList.toIngredientResponseList()
+    }
+
+    fun updateIngredient(id: Long, ingredientRequest: IngredientRequest): IngredientResponse {
+        val ingredient = ingredientRepository.findById(id).orElseThrow { NoSuchElementException("해당 식재료가 존재하지 않습니다. ID: $id") }
+        ingredient.update(ingredientRequest)
+        return IngredientResponse(ingredientRepository.save(ingredient))
+    }
+
+    fun deleteIngredient(id: Long): String {
+        ingredientRepository.deleteById(id)
+        return "deleted"
+    }
+}