✨ 그룹 이름 중복확인 로직 추가

Author: soopeach

data/src/main/java/com/whyranoid/data/group/GroupDataSource.kt

@@ -20,6 +20,7 @@ import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.suspendCancellableCoroutine
+import kotlinx.coroutines.tasks.await
 import java.util.UUID
 import javax.inject.Inject
 import kotlin.coroutines.resume
@@ -152,4 +153,13 @@ class GroupDataSource @Inject constructor(
             }
         awaitClose()
     }
+
+    suspend fun isDuplicatedGroupName(groupName: String): Boolean {
+        return db.collection(GROUPS_COLLECTION)
+            .whereEqualTo(GROUP_NAME, groupName)
+            .get()
+            .await()
+            .isEmpty
+            .not()
+    }
 }

data/src/main/java/com/whyranoid/data/group/GroupRepositoryImpl.kt

@@ -58,4 +58,8 @@ class GroupRepositoryImpl @Inject constructor(
     ): Boolean {
         return groupDataSource.createGroup(groupName, introduce, rules, uid)
     }
+
+    override suspend fun isDuplicatedGroupName(groupName: String): Boolean {
+        return groupDataSource.isDuplicatedGroupName(groupName)
+    }
 }

domain/src/main/java/com/whyranoid/domain/repository/GroupRepository.kt

@@ -40,4 +40,6 @@ interface GroupRepository {
         rules: List<String>,
         uid: String
     ): Boolean
+
+    suspend fun isDuplicatedGroupName(groupName: String): Boolean
 }

domain/src/main/java/com/whyranoid/domain/usecase/CheckIsDuplicatedGroupNameUseCase.kt

@@ -0,0 +1,13 @@
+package com.whyranoid.domain.usecase
+
+import com.whyranoid.domain.repository.GroupRepository
+import javax.inject.Inject
+
+class CheckIsDuplicatedGroupNameUseCase @Inject constructor(
+    private val groupRepository: GroupRepository
+) {
+
+    suspend operator fun invoke(groupName: String): Boolean {
+        return groupRepository.isDuplicatedGroupName(groupName)
+    }
+}