refactor :: 계정 아이디 디바운스 구현

Author: uson1004

feature/src/main/java/team/aliens/dms/android/feature/resetpassword/ResetPasswordViewModel.kt

@@ -3,6 +3,10 @@ package team.aliens.dms.android.feature.resetpassword
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
 import kotlinx.coroutines.launch
 import team.aliens.dms.android.core.ui.mvi.BaseMviViewModel
 import team.aliens.dms.android.core.ui.mvi.Intent
@@ -15,6 +19,8 @@ import team.aliens.dms.android.shared.validator.checkIfPasswordValid
 import java.util.UUID
 import javax.inject.Inject
 
+const val SEARCH_DEBOUNCE_MILLIS = 1000L
+
 @HiltViewModel
 class ResetPasswordViewModel @Inject constructor(
     private val studentRepository: StudentRepository,
@@ -27,6 +33,10 @@ class ResetPasswordViewModel @Inject constructor(
        검사에서 가능이 뜨게 된다면 "이메일 인증번호 보내기 APi"를 사용해서 사용자 이메일에 이메일을 발송합니다.
        그리고 이메일 인증번호 확인 Api를 사용하여 인증을 완료하고 Students의 비밀번호 재설정 Api를 사용하여 재설정합니다.*/
 
+    init {
+        debounceName()
+    }
+
     override fun processIntent(intent: ResetPasswordIntent) {
         when (intent) {
             ResetPasswordIntent.SetPassword -> resetPassword()
@@ -43,6 +53,17 @@ class ResetPasswordViewModel @Inject constructor(
         }
     }
 
+    @OptIn(FlowPreview::class)
+    private fun debounceName() {
+        viewModelScope.launch {
+            stateFlow.map { it.accountId }.distinctUntilChanged().debounce(SEARCH_DEBOUNCE_MILLIS).collect {
+                if (it.isNotBlank()) {
+                    checkIdExists()
+                }
+            }
+        }
+    }
+
     private fun resetPassword() = viewModelScope.launch(Dispatchers.IO) {
         val capturedState = stateFlow.value
         if (capturedState.newPassword != capturedState.newPasswordRepeat) {
@@ -105,7 +126,7 @@ class ResetPasswordViewModel @Inject constructor(
         }
 
     private fun updateEmailVerificationCode(value: String) = run {
-        if (value.length > ResetPasswordViewModel.EMAIL_VERIFICATION_CODE_LENGTH) {
+        if (value.length > EMAIL_VERIFICATION_CODE_LENGTH) {
             return@run false
         }
         reduce(newState = stateFlow.value.copy(emailVerificationCode = value))