Feat/21 authentication in mobile app

mobile_app/authentication/src/main/java/com/examhacker/authentication/component/AuthenticationComponent.kt

@@ -1,10 +1,78 @@
 package com.examhacker.authentication.component
 
 import com.arkivanov.decompose.ComponentContext
+import com.arkivanov.decompose.value.MutableValue
+import com.arkivanov.decompose.value.Value
+import com.arkivanov.decompose.value.update
 
-interface IAuthenticationComponent {}
+interface IAuthenticationComponent {
+    val model: Value<Model>
+
+    data class Model(
+        val screenMode: ScreenMode = ScreenMode.REGISTER,
+        val email: String = "",
+        val password: String = "",
+        val repeatedPassword: String = ""
+    )
+
+    fun switchScreenMode(mode: ScreenMode)
+    fun onEmailChange(email: String)
+    fun onPasswordChange(password: String)
+    fun onRepeatedPasswordChange(repeatedPassword: String)
+    fun onSignUp()
+    fun onLogin()
+}
 
 class AuthenticationComponent(componentContext: ComponentContext)
     : IAuthenticationComponent, ComponentContext by componentContext {
 
+    private val _model = MutableValue(IAuthenticationComponent.Model())
+    override val model: Value<IAuthenticationComponent.Model> = _model
+
+    override fun switchScreenMode(mode: ScreenMode) {
+        _model.update {
+            it.copy(
+                screenMode = mode,
+                email = "",
+                password = "",
+                repeatedPassword = ""
+            )
+        }
+    }
+
+    override fun onEmailChange(email: String) {
+        _model.update {
+            it.copy(email = email)
+        }
+    }
+
+    override fun onPasswordChange(password: String) {
+        _model.update {
+            it.copy(password = password)
+        }
+    }
+
+    override fun onRepeatedPasswordChange(repeatedPassword: String) {
+        _model.update {
+            it.copy(repeatedPassword = repeatedPassword)
+        }
+    }
+
+    override fun onSignUp() {
+        _model.update {
+            it.copy(screenMode = ScreenMode.DEMO_END)
+        }
+    }
+
+    override fun onLogin() {
+        _model.update {
+            it.copy(screenMode = ScreenMode.DEMO_END)
+        }
+    }
+}
+
+enum class ScreenMode {
+    LOGIN,
+    REGISTER,
+    DEMO_END
 }