[feat] #1 login activity

feature/main/src/main/java/org/sopt/main/login/LoginActivity.kt

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+package org.sopt.main.login
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import dagger.hilt.android.AndroidEntryPoint
+import org.orbitmvi.orbit.viewmodel.observe
+import org.sopt.designsystem.R
+import org.sopt.main.const.IntentKey.USER_KEY
+import org.sopt.main.databinding.ActivityLoginBinding
+import org.sopt.main.main.MainActivity
+import org.sopt.main.model.User
+import org.sopt.main.signup.SignupActivity
+import org.sopt.ui.context.snackBar
+import org.sopt.ui.context.stringOf
+import org.sopt.ui.intent.getParcelable
+
+@AndroidEntryPoint
+class LoginActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityLoginBinding
+    private lateinit var resultLauncher: ActivityResultLauncher<Intent>
+    private val viewModel by viewModels<LoginViewModel>()
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityLoginBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        initResultLauncher()
+        initSignupButtonClickListener()
+        initLoginButtonClickListener()
+        collectState()
+    }
+
+    private fun initResultLauncher() {
+        resultLauncher = registerForActivityResult(
+            ActivityResultContracts.StartActivityForResult()
+        ) { result ->
+            if (result.resultCode == RESULT_OK) {
+                result.data?.getParcelable(USER_KEY, User::class.java).let { user ->
+                    viewModel.signupSuccess(user)
+                }
+            }
+        }
+    }
+
+    private fun initSignupButtonClickListener() {
+        binding.btnLoginSignup.setOnClickListener {
+            viewModel.signup()
+        }
+    }
+
+    private fun initLoginButtonClickListener() {
+        binding.btnLoginLogin.setOnClickListener {
+            viewModel.login(binding.etLoginId.text.toString(), binding.etLoginPw.text.toString())
+        }
+    }
+
+    private fun collectState() {
+        viewModel.observe(lifecycleOwner = this, sideEffect = ::handleSideEffect)
+    }
+
+    private fun handleSideEffect(sideEffect: LoginSideEffect) {
+        when (sideEffect) {
+            is LoginSideEffect.NavigateToSignUp -> {
+                Intent(this, SignupActivity::class.java).apply {
+                    resultLauncher.launch(this)
+                }
+            }
+
+            is LoginSideEffect.LoginSuccess -> {
+                Intent(this, MainActivity::class.java).apply {
+                    putExtra(USER_KEY, sideEffect.user)
+                    startActivity(this)
+                }
+            }
+            LoginSideEffect.SignupSuccess -> {
+                snackBar(binding.root) { stringOf(R.string.login_signup_success) }
+            }
+            is LoginSideEffect.showSnackbar -> {
+                snackBar(binding.root) { sideEffect.message }
+            }
+        }
+    }
+}

feature/main/src/main/java/org/sopt/main/login/LoginContract.kt

@@ -0,0 +1,19 @@
+package org.sopt.main.login
+
+import org.sopt.main.model.User
+
+data class LoginState(
+    val id: String = "",
+    val password: String = "",
+    val registeredId: String = "",
+    val registeredPassword: String = "",
+    val name: String = "",
+    val hobby: String = ""
+)
+
+sealed interface LoginSideEffect {
+    data class showSnackbar(val message: String) : LoginSideEffect
+    data class LoginSuccess(val user: User) : LoginSideEffect
+    data object NavigateToSignUp : LoginSideEffect
+    data object SignupSuccess : LoginSideEffect
+}

feature/main/src/main/java/org/sopt/main/login/LoginViewModel.kt

@@ -0,0 +1,55 @@
+package org.sopt.main.login
+
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import org.orbitmvi.orbit.Container
+import org.orbitmvi.orbit.ContainerHost
+import org.orbitmvi.orbit.syntax.simple.intent
+import org.orbitmvi.orbit.syntax.simple.postSideEffect
+import org.orbitmvi.orbit.syntax.simple.reduce
+import org.orbitmvi.orbit.viewmodel.container
+import org.sopt.designsystem.R
+import org.sopt.main.model.User
+import org.sopt.ui.context.ResourceProvider
+import javax.inject.Inject
+
+@HiltViewModel
+class LoginViewModel @Inject constructor(
+    private val resourceProvider: ResourceProvider
+) : ContainerHost<LoginState, LoginSideEffect>, ViewModel() {
+    override val container: Container<LoginState, LoginSideEffect> = container(LoginState())
+
+    fun signup() = intent {
+        postSideEffect(LoginSideEffect.NavigateToSignUp)
+    }
+
+    fun login(id: String, password: String) = intent {
+        with(state) {
+            when {
+                checkRegister() -> postSideEffect(LoginSideEffect.showSnackbar(getString(R.string.login_not_registered)))
+                matchesUserInfo(id, password) -> postSideEffect(LoginSideEffect.LoginSuccess(createUser()))
+                else -> postSideEffect(LoginSideEffect.showSnackbar(getString(R.string.login_login_fail)))
+            }
+        }
+    }
+    private fun LoginState.checkRegister() = registeredId.isBlank() || registeredPassword.isBlank()
+
+    private fun LoginState.matchesUserInfo(id: String, password: String) = registeredId == id && registeredPassword == password
+
+    private fun LoginState.createUser() = User(registeredId, registeredPassword, name, hobby)
+
+    private fun getString(resId: Int) = resourceProvider.getString(resId)
+
+    fun signupSuccess(user: User?) = intent {
+        postSideEffect(LoginSideEffect.SignupSuccess)
+
+        reduce {
+            state.copy(
+                registeredId = user?.id.orEmpty(),
+                registeredPassword = user?.pw.orEmpty(),
+                name = user?.name.orEmpty(),
+                hobby = user?.hobby.orEmpty()
+            )
+        }
+    }
+}

feature/main/src/main/res/layout/activity_login.xml

@@ -0,0 +1,86 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".login.LoginActivity">
+
+    <TextView
+        android:id="@+id/tv_login_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/login_title"
+        android:textSize="30sp"
+        android:layout_marginTop="30dp"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <TextView
+        android:id="@+id/tv_login_id"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/login_id"
+        android:textSize="20sp"
+        android:layout_marginStart="20dp"
+        android:layout_marginTop="40dp"
+        app:layout_constraintTop_toBottomOf="@id/tv_login_title"
+        app:layout_constraintStart_toStartOf="parent"/>
+
+    <EditText
+        android:id="@+id/et_login_id"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="20sp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/tv_login_id" />
+
+    <TextView
+        android:id="@+id/tv_login_pw"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/login_pw"
+        android:textSize="20sp"
+        android:layout_marginStart="20dp"
+        android:layout_marginTop="40dp"
+        app:layout_constraintTop_toBottomOf="@id/et_login_id"
+        app:layout_constraintStart_toStartOf="parent"/>
+
+    <EditText
+        android:id="@+id/et_login_pw"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="20dp"
+        android:inputType="textPassword"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/tv_login_pw" />
+
+    <Button
+        android:id="@+id/btn_login_login"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="@string/login_login"
+        android:gravity="center"
+        android:layout_marginBottom="20dp"
+        android:layout_marginHorizontal="20dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toTopOf="@id/btn_login_signup" />
+
+    <Button
+        android:id="@+id/btn_login_signup"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="@string/login_signup"
+        android:gravity="center"
+        android:layout_marginBottom="40dp"
+        android:layout_marginHorizontal="20dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

feature/main/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+
+</resources>