Feat: 과목 선정 로직 구현 - 1단계 (#27)

Closes #21 

다음 사항 구현했습니다.
- 전공 필수, 교양 필수(채플 포함), 전공 선택(사용자가 선택한 것만) 이름으로 조회하기
- 3가지 분야의 과목들을 가지고, 시간표가 성립 가능한 모든 경우의 수 생성(성립이 되는 경우가 하나도 없다면 오류 반환)

src/main/kotlin/com/yourssu/soongpt/domain/course/storage/CourseEntity.kt → src/main/kotlin/com/yourssu/soongpt/domain/course/CourseEntity.kt

@@ -1,4 +1,4 @@
-package com.yourssu.soongpt.domain.course.storage
+package com.yourssu.soongpt.domain.course
 
 import com.yourssu.soongpt.domain.course.implement.Classification
 import com.yourssu.soongpt.domain.course.implement.Course

src/main/kotlin/com/yourssu/soongpt/domain/course/storage/CourseRepositoryImpl.kt → src/main/kotlin/com/yourssu/soongpt/domain/course/CourseRepositoryImpl.kt

@@ -1,10 +1,11 @@
-package com.yourssu.soongpt.domain.course.storage
+package com.yourssu.soongpt.domain.course
 
 import com.querydsl.jpa.impl.JPAQueryFactory
+import com.yourssu.soongpt.domain.course.QCourseEntity.courseEntity
 import com.yourssu.soongpt.domain.course.implement.Classification
 import com.yourssu.soongpt.domain.course.implement.Course
 import com.yourssu.soongpt.domain.course.implement.CourseRepository
-import com.yourssu.soongpt.domain.course.storage.QCourseEntity.courseEntity
+import com.yourssu.soongpt.domain.course.implement.Courses
 import com.yourssu.soongpt.domain.departmentGrade.storage.QDepartmentGradeEntity.departmentGradeEntity
 import com.yourssu.soongpt.domain.target.storage.QTargetEntity.targetEntity
 import org.springframework.data.jpa.repository.JpaRepository
@@ -40,6 +41,26 @@ class CourseRepositoryImpl(
             .fetch()
             .map { it.toDomain() }
     }
+
+    override fun findByDepartmentIdAndCourseName(
+        departmentId: Long,
+        courseName: String,
+        classification: Classification
+    ): Courses {
+        val courses = jpaQueryFactory.selectFrom(courseEntity)
+            .innerJoin(targetEntity)
+            .on(courseEntity.id.eq(targetEntity.courseId))
+            .innerJoin(departmentGradeEntity)
+            .on(targetEntity.departmentGradeId.eq(departmentGradeEntity.id))
+            .where(
+                departmentGradeEntity.departmentId.eq(departmentId),
+                courseEntity.courseName.eq(courseName),
+                courseEntity.classification.eq(classification)
+            )
+            .fetch()
+            .map { it.toDomain() }
+        return Courses(courses)
+    }
 }
 
 interface CourseJpaRepository : JpaRepository<CourseEntity, Long> {

src/main/kotlin/com/yourssu/soongpt/domain/course/business/CourseService.kt

@@ -10,11 +10,11 @@ import com.yourssu.soongpt.domain.courseTime.implement.CourseTimeReader
 import com.yourssu.soongpt.domain.courseTime.implement.CourseTimeWriter
 import com.yourssu.soongpt.domain.department.implement.DepartmentReader
 import com.yourssu.soongpt.domain.departmentGrade.implement.DepartmentGradeReader
+import com.yourssu.soongpt.domain.target.implement.Target
 import com.yourssu.soongpt.domain.target.implement.TargetReader
+import com.yourssu.soongpt.domain.target.implement.TargetWriter
 import org.springframework.stereotype.Service
 import org.springframework.transaction.annotation.Transactional
-import com.yourssu.soongpt.domain.target.implement.Target
-import com.yourssu.soongpt.domain.target.implement.TargetWriter
 
 @Service
 class CourseService(

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/CourseReader.kt

@@ -1,5 +1,6 @@
 package com.yourssu.soongpt.domain.course.implement
 
+import com.yourssu.soongpt.domain.course.implement.exception.CourseNotFoundException
 import org.springframework.stereotype.Component
 
 @Component
@@ -17,4 +18,24 @@ class CourseReader(
     fun findAllByDepartmentIdInGeneralRequired(departmentId: Long): List<Course> {
         return courseRepository.findAllByDepartmentId(departmentId, Classification.GENERAL_REQUIRED)
     }
+
+    fun findAllByCourseNameInMajorRequired(departmentId: Long, courseName: String): Courses {
+        return findAllByCourseName(departmentId, courseName, Classification.MAJOR_REQUIRED)
+    }
+
+    fun findAllByCourseNameInMajorElective(departmentId: Long, courseName: String): Courses {
+        return findAllByCourseName(departmentId, courseName, Classification.MAJOR_ELECTIVE)
+    }
+
+    fun findAllByCourseNameInGeneralRequired(departmentId: Long, courseName: String): Courses {
+       return findAllByCourseName(departmentId, courseName, Classification.GENERAL_REQUIRED)
+    }
+
+    private fun findAllByCourseName(departmentId: Long, courseName: String, classification: Classification): Courses {
+        val courses = courseRepository.findByDepartmentIdAndCourseName(departmentId, courseName, classification)
+        if (courses.isEmpty()) {
+            throw CourseNotFoundException(courseName = courseName)
+        }
+        return courses
+    }
 }

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/CourseRepository.kt

@@ -4,4 +4,5 @@ interface CourseRepository {
     fun save(course: Course): Course
     fun findAllByDepartmentId(departmentId: Long, classification: Classification): List<Course>
     fun getAll(ids: List<Long>): List<Course>
+    fun findByDepartmentIdAndCourseName(departmentId: Long, courseName: String, classification: Classification): Courses
 }

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/Courses.kt

@@ -0,0 +1,13 @@
+package com.yourssu.soongpt.domain.course.implement
+
+class Courses(
+    val courses: List<Course>,
+) {
+    fun isEmpty(): Boolean {
+        return courses.isEmpty()
+    }
+
+    fun unpackNameAndProfessor(): List<Pair<String, String>> {
+        return courses.map { it.courseName to it.professorName!! }
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/CoursesFactory.kt

@@ -0,0 +1,23 @@
+package com.yourssu.soongpt.domain.course.implement
+
+import com.yourssu.soongpt.domain.course.implement.exception.InvalidTimetableRequestException
+import org.springframework.stereotype.Component
+
+@Component
+class CoursesFactory {
+    fun generateTimetableCandidates(
+        coursesCandidates: List<Courses>
+    ): List<Courses> {
+        return coursesCandidates.fold(listOf(emptyList<Course>())) { acc, courses ->
+            acc.flatMap { currentCombination ->
+                courses.courses.map { course -> currentCombination + course }
+            }
+        }.map { Courses(it) }
+    }
+
+    fun validateEmpty(timetableCandidates: List<Courses>) {
+        if (timetableCandidates.isEmpty()) {
+            throw InvalidTimetableRequestException()
+        }
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/exception/CourseNotFoundException.kt

@@ -0,0 +1,8 @@
+package com.yourssu.soongpt.domain.course.implement.exception
+
+import com.yourssu.soongpt.common.handler.NotFoundException
+
+class CourseNotFoundException(
+    val courseName: String = "",
+) : NotFoundException(message = "해당하는 과목이 없습니다. 과목 이름: {$courseName}") {
+}

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/exception/InvalidCoursesException.kt

@@ -0,0 +1,3 @@
+package com.yourssu.soongpt.domain.course.implement.exception
+
+class InvalidCoursesException : RuntimeException()

src/main/kotlin/com/yourssu/soongpt/domain/course/implement/exception/InvalidTimetableRequestException.kt

@@ -0,0 +1,7 @@
+package com.yourssu.soongpt.domain.course.implement.exception
+
+import com.yourssu.soongpt.common.handler.BadRequestException
+
+class InvalidTimetableRequestException : BadRequestException(message = "시간표가 나올 수 있는 경우의 수가 없습니다.") {
+
+}

src/main/kotlin/com/yourssu/soongpt/domain/rating/application/dto/RatingCreatedRequest.kt

@@ -0,0 +1,19 @@
+package com.yourssu.soongpt.domain.rating.application.dto
+
+import com.yourssu.soongpt.domain.rating.business.RatingCreatedCommand
+
+data class RatingCreatedRequest(
+    val course: String,
+    val professor: String,
+    val star: Double,
+    val point: Double
+) {
+    fun toCommand(): RatingCreatedCommand {
+        return RatingCreatedCommand(
+            course = course,
+            professor = professor,
+            star = star,
+            point = point
+        )
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/rating/business/RatingCreatedCommand.kt

@@ -0,0 +1,19 @@
+package com.yourssu.soongpt.domain.rating.business
+
+import com.yourssu.soongpt.domain.rating.implement.Rating
+
+class RatingCreatedCommand(
+    val course: String,
+    val professor: String,
+    val star: Double,
+    val point: Double,
+) {
+    fun toRating(): Rating {
+        return Rating(
+            courseName = course,
+            professorName = professor,
+            star = star,
+            point = point,
+        )
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/rating/business/dto/RatingResponse.kt

@@ -0,0 +1,21 @@
+package com.yourssu.soongpt.domain.rating.business.dto
+
+import com.yourssu.soongpt.domain.rating.implement.Rating
+
+data class RatingResponse(
+    val course: String,
+    val professor: String,
+    val star: Double,
+    val point: Double,
+) {
+    companion object {
+        fun from(rating: Rating): RatingResponse {
+            return RatingResponse(
+                course = rating.courseName,
+                professor = rating.professorName,
+                star = rating.star,
+                point = rating.point,
+            )
+        }
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/rating/implement/Rating.kt

@@ -4,7 +4,7 @@ class Rating(
     val id: Long? = null,
     val courseName: String,
     val professorName: String,
-    val star: Int,
+    val star: Double,
     var point: Double = 50.0,
 ) {
 }

src/main/kotlin/com/yourssu/soongpt/domain/rating/implement/RatingReader.kt

@@ -0,0 +1,22 @@
+package com.yourssu.soongpt.domain.rating.implement
+
+import com.yourssu.soongpt.domain.course.implement.Courses
+import com.yourssu.soongpt.domain.rating.implement.exception.RatingNotFoundByCourseNameException
+import org.springframework.stereotype.Component
+
+@Component
+class RatingReader(
+    private val ratingRepository: RatingRepository,
+) {
+    fun findAllBy(courses: Courses): List<Rating> {
+        return courses.unpackNameAndProfessor().mapNotNull { (courseName, professorName) ->
+            ratingRepository.findByCourseNameAndProfessorName(courseName, professorName)
+        }
+    }
+
+
+    fun findBy(courseName: String, professorName: String): Rating {
+        return ratingRepository.findByCourseNameAndProfessorName(courseName, professorName)
+            ?: throw RatingNotFoundByCourseNameException()
+    }
+}

src/main/kotlin/com/yourssu/soongpt/domain/rating/storage/RatingEntity.kt

@@ -17,7 +17,7 @@ class RatingEntity(
     val professorName: String,
 
     @Column(name = "star", nullable = false)
-    val star: Int,
+    val star: Double,
 
     @Column(name = "point", nullable = false)
     val point: Double,

src/main/kotlin/com/yourssu/soongpt/domain/timetable/application/TimetableController.kt

@@ -1,19 +1,25 @@
 package com.yourssu.soongpt.domain.timetable.application
 
 import com.yourssu.soongpt.common.business.dto.Response
+import com.yourssu.soongpt.domain.timetable.application.dto.TimetableCreatedRequest
 import com.yourssu.soongpt.domain.timetable.business.TimetableService
 import com.yourssu.soongpt.domain.timetable.business.dto.TimetableResponse
+import com.yourssu.soongpt.domain.timetable.business.dto.TimetableResponses
 import org.springframework.http.ResponseEntity
-import org.springframework.web.bind.annotation.GetMapping
-import org.springframework.web.bind.annotation.PathVariable
-import org.springframework.web.bind.annotation.RequestMapping
-import org.springframework.web.bind.annotation.RestController
+import org.springframework.web.bind.annotation.*
 
 @RestController
 @RequestMapping("/api/timetables")
 class TimetableController(
     private val timetableService: TimetableService,
 ) {
+    @PostMapping
+    fun createTimetable(@RequestBody request: TimetableCreatedRequest): ResponseEntity<Response<TimetableResponses>> {
+        val responses = timetableService.createTimetable(request.toCommand())
+        return ResponseEntity.ok(Response(result=responses))
+    }
+
+
     @GetMapping("/{id}")
     fun getTimetable(@PathVariable id: Long): ResponseEntity<Response<TimetableResponse>> {
         val response = timetableService.getTimeTable(id)

src/main/kotlin/com/yourssu/soongpt/domain/timetable/application/dto/TimetableCreatedRequest.kt

@@ -0,0 +1,39 @@
+package com.yourssu.soongpt.domain.timetable.application.dto
+
+import com.yourssu.soongpt.domain.timetable.business.dto.TimetableCreatedCommand
+import jakarta.validation.constraints.NotBlank
+import jakarta.validation.constraints.NotNull
+import org.hibernate.validator.constraints.Range
+
+data class TimetableCreatedRequest(
+    @field:Range(min = 15, max = 25, message = "학번은 15부터 25까지 가능합니다.")
+    val schoolId: Int,
+
+    @field:NotBlank(message = "학과는 필수 입력값입니다.")
+    val department: String,
+
+    @field:Range(min = 1, max = 5, message = "학년은 1부터 5까지 가능합니다.")
+    val grade: Int,
+
+    val isChapel: Boolean = false,
+
+    @field:NotNull
+    val majorRequiredCourses: List<String>,
+
+    @field:NotNull
+    val majorElectiveCourses: List<String>,
+
+    @field:NotNull
+    val generalRequiredCourses: List<String>,
+) {
+    fun toCommand(): TimetableCreatedCommand {
+        return TimetableCreatedCommand(
+            departmentName = department,
+            grade = grade,
+            isChapel = isChapel,
+            majorRequiredCourses = majorRequiredCourses,
+            majorElectiveCourses = majorElectiveCourses,
+            generalRequiredCourses = generalRequiredCourses,
+        )
+    }
+}