Add early validation for special mail domains (#1000) (#1176)

app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormFragment.kt

@@ -150,6 +150,13 @@ class LoginFormFragment : BaseFragment<FragmentLoginFormBinding>(R.layout.fragme
         }
     }
 
+    override fun setErrorEmailInvalid(domain: String) {
+        with(binding.loginFormUsernameLayout) {
+            requestFocus()
+            error = getString(R.string.login_invalid_custom_email,domain)
+        }
+    }
+
     override fun clearUsernameError() {
         binding.loginFormUsernameLayout.error = null
     }

app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormPresenter.kt

@@ -11,6 +11,7 @@ import io.github.wulkanowy.utils.flowWithResource
 import io.github.wulkanowy.utils.ifNullOrBlank
 import kotlinx.coroutines.flow.onEach
 import timber.log.Timber
+import java.net.URL
 import javax.inject.Inject
 
 class LoginFormPresenter @Inject constructor(
@@ -87,7 +88,14 @@ class LoginFormPresenter @Inject constructor(
 
         if (!validateCredentials(email, password, host)) return
 
-        flowWithResource { studentRepository.getStudentsScrapper(email, password, host, symbol) }.onEach {
+        flowWithResource {
+            studentRepository.getStudentsScrapper(
+                email,
+                password,
+                host,
+                symbol
+            )
+        }.onEach {
             when (it.status) {
                 Status.LOADING -> view?.run {
                     Timber.i("Login started")
@@ -150,11 +158,18 @@ class LoginFormPresenter @Inject constructor(
                 view?.setErrorLoginRequired()
                 isCorrect = false
             }
-
             if ("@" !in login && "email" in host) {
                 view?.setErrorEmailRequired()
                 isCorrect = false
             }
+            if ("@" in login && "login" !in host && "email" !in host) {
+                val emailHost = login.substringAfter("@")
+                val emailDomain = URL(host).host
+                if (emailHost != emailDomain) {
+                    view?.setErrorEmailInvalid(domain = emailDomain)
+                    isCorrect = false
+                }
+            }
         }
 
         if (password.isEmpty()) {

app/src/main/java/io/github/wulkanowy/ui/modules/login/form/LoginFormView.kt

@@ -39,6 +39,8 @@ interface LoginFormView : BaseView {
 
     fun setErrorPassIncorrect()
 
+    fun setErrorEmailInvalid(domain: String)
+
     fun clearUsernameError()
 
     fun clearPassError()