feat(home): 추천 크리에이터 동시 팔로우 API를 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/home/adapter/in/web/HomeRecommendationController.kt

@@ -0,0 +1,40 @@
+package kr.co.vividnext.sodalive.v2.api.home.adapter.`in`.web
+
+import kr.co.vividnext.sodalive.common.ApiResponse
+import kr.co.vividnext.sodalive.common.SodaException
+import kr.co.vividnext.sodalive.member.Member
+import kr.co.vividnext.sodalive.v2.api.home.dto.FollowRecommendedCreatorsRequest
+import kr.co.vividnext.sodalive.v2.recommend.application.RecommendedCreatorFollowService
+import org.springframework.security.core.annotation.AuthenticationPrincipal
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/v2/home/recommendations")
+class HomeRecommendationController(
+    private val recommendedCreatorFollowService: RecommendedCreatorFollowService
+) {
+    @PostMapping("/creators/follow")
+    fun followRecommendedCreators(
+        @RequestBody request: FollowRecommendedCreatorsRequest,
+        @AuthenticationPrincipal(expression = "#this == 'anonymousUser' ? null : member") member: Member?
+    ) = run {
+        if (member == null) throw SodaException(messageKey = "common.error.bad_credentials")
+        val creatorIds = request.creatorIds
+        if (creatorIds.isNullOrEmpty() || creatorIds.size > MAX_CREATOR_IDS) {
+            throw SodaException(messageKey = "common.error.invalid_request")
+        }
+
+        recommendedCreatorFollowService.followCreators(
+            member = member,
+            creatorIds = creatorIds
+        )
+        ApiResponse.ok<Unit>()
+    }
+
+    companion object {
+        private const val MAX_CREATOR_IDS = 50
+    }
+}

src/main/kotlin/kr/co/vividnext/sodalive/v2/api/home/dto/FollowRecommendedCreatorsRequest.kt

@@ -0,0 +1,5 @@
+package kr.co.vividnext.sodalive.v2.api.home.dto
+
+data class FollowRecommendedCreatorsRequest(
+    val creatorIds: List<Long>?
+)