Add CAS login support.

app/src/main/java/chat/rocket/android/authentication/login/presentation/LoginPresenter.kt

@@ -4,9 +4,11 @@ import chat.rocket.android.authentication.domain.model.TokenModel
 import chat.rocket.android.authentication.presentation.AuthenticationNavigator
 import chat.rocket.android.core.lifecycle.CancelStrategy
 import chat.rocket.android.helper.NetworkHelper
+import chat.rocket.android.helper.UrlHelper
 import chat.rocket.android.infrastructure.LocalRepository
 import chat.rocket.android.server.domain.*
 import chat.rocket.android.server.infraestructure.RocketChatClientFactory
+import chat.rocket.android.util.extensions.generateRandomString
 import chat.rocket.android.util.extensions.isEmailValid
 import chat.rocket.android.util.extensions.launchUI
 import chat.rocket.common.RocketChatException
@@ -41,38 +43,56 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
             return
         }
 
-        view.showSignUpView(settings.registrationEnabled())
+        if (settings.casEnabled()) {
+            // Hiding the views in order to show the WebView instead.
+            view.hideUsernameOrEmailView()
+            view.hidePasswordView()
+            view.hideSignUpView()
+            view.hideOauthView()
+            view.hideLoginButton()
 
-        var hasSocial = false
-        if (settings.facebookEnabled()) {
-            view.enableLoginByFacebook()
-            hasSocial = true
-        }
-        if (settings.githubEnabled()) {
-            view.enableLoginByGithub()
-            hasSocial = true
-        }
-        if (settings.googleEnabled()) {
-            view.enableLoginByGoogle()
-            hasSocial = true
-        }
-        if (settings.linkedinEnabled()) {
-            view.enableLoginByLinkedin()
-            hasSocial = true
-        }
-        if (settings.meteorEnabled()) {
-            view.enableLoginByMeteor()
-            hasSocial = true
-        }
-        if (settings.twitterEnabled()) {
-            view.enableLoginByTwitter()
-            hasSocial = true
-        }
-        if (settings.gitlabEnabled()) {
-            view.enableLoginByGitlab()
-            hasSocial = true
+            view.showLoading()
+            val token = generateRandomString(17)
+            view.showCasView(UrlHelper.getCasUrl(settings.casLoginUrl(), server, token), token)
+        } else {
+            if (settings.registrationEnabled()){
+                view.showSignUpView()
+            }
+
+            var hasSocial = false
+            if (settings.facebookEnabled()) {
+                view.enableLoginByFacebook()
+                hasSocial = true
+            }
+            if (settings.githubEnabled()) {
+                view.enableLoginByGithub()
+                hasSocial = true
+            }
+            if (settings.googleEnabled()) {
+                view.enableLoginByGoogle()
+                hasSocial = true
+            }
+            if (settings.linkedinEnabled()) {
+                view.enableLoginByLinkedin()
+                hasSocial = true
+            }
+            if (settings.meteorEnabled()) {
+                view.enableLoginByMeteor()
+                hasSocial = true
+            }
+            if (settings.twitterEnabled()) {
+                view.enableLoginByTwitter()
+                hasSocial = true
+            }
+            if (settings.gitlabEnabled()) {
+                view.enableLoginByGitlab()
+                hasSocial = true
+            }
+
+            if (hasSocial) {
+                view.showOauthView()
+            }
         }
-        view.showOauthView(hasSocial)
     }
 
     fun authenticate(usernameOrEmail: String, password: String) {
@@ -110,9 +130,7 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
                             }
 
                             if (token != null) {
-                                val me = client.me()
-                                multiServerRepository.save(server, TokenModel(token.userId, token.authToken))
-                                localRepository.save(LocalRepository.USERNAME_KEY, me.username)
+                                saveToken(server, TokenModel(token.userId, token.authToken), client.me().username)
                                 registerPushToken()
                                 navigator.toChatList()
                             } else {
@@ -142,6 +160,41 @@ class LoginPresenter @Inject constructor(private val view: LoginView,
         }
     }
 
+    fun authenticateWithCas(casCredential: String) {
+        launchUI(strategy) {
+            if (NetworkHelper.hasInternetAccess()) {
+                view.showLoading()
+                try {
+                    val server = serverInteractor.get()
+                    if (server != null) {
+                        val token = client.loginWithCas(casCredential)
+                        saveToken(server, TokenModel(token.userId, token.authToken), client.me().username)
+                        registerPushToken()
+                        navigator.toChatList()
+                    } else {
+                        navigator.toServerScreen()
+                    }
+                } catch (exception: RocketChatException) {
+                    exception.message?.let {
+                        view.showMessage(it)
+                    }.ifNull {
+                        view.showGenericErrorMessage()
+                    }
+                } finally {
+                    view.hideLoading()
+                }
+            } else {
+                view.showNoInternetConnection()
+            }
+        }
+    }
+
+    private suspend fun saveToken(server: String, tokenModel: TokenModel, username: String?) {
+        multiServerRepository.save(server, tokenModel)
+        localRepository.save(LocalRepository.USERNAME_KEY, username)
+        registerPushToken()
+    }
+
     fun signup() = navigator.toSignUp()
 
     private suspend fun registerPushToken() {

app/src/main/java/chat/rocket/android/authentication/login/presentation/LoginView.kt

@@ -6,64 +6,97 @@ import chat.rocket.android.core.behaviours.MessageView
 
 interface LoginView : LoadingView, MessageView, InternetView {
 
+    /**
+     * Shows the CAS view if the server settings allow the sign in/sign out via CAS protocol.
+
+     * @param casUrl The CAS URL to login/sign up with.
+     * @param requestedToken The requested Token sent to the CAS server.
+     */
+    fun showCasView(casUrl: String, requestedToken: String)
+
+    /**
+     * Shows the sign up view if the server settings allow the new users registration.
+     */
+    fun showSignUpView()
+
     /**
      * Shows the oauth view if the server settings allow the login via social accounts.
      *
      * REMARK: we must show at maximum *three* social accounts views ([enableLoginByFacebook], [enableLoginByGithub], [enableLoginByGoogle],
      * [enableLoginByLinkedin], [enableLoginByMeteor], [enableLoginByTwitter] or [enableLoginByGitlab]) for the oauth view.
      * If the possibility of login via social accounts exceeds 3 different ways we should set up the FAB ([setupFabListener]) to show the remaining view(s).
-     *
-     * @param value True to show the oauth view, false otherwise.
      */
-    fun showOauthView(value: Boolean)
+    fun showOauthView()
 
     /**
-     * Setups the FloatingActionButton to show more social accounts views (expanding the oauth view interface to show the remaining view(s)).
+     * Shows the login button.
      */
-    fun setupFabListener()
+    fun showLoginButton()
 
     /**
-     * Shows the login by Facebook view.
+     * Shows the login by Facebook view if the server settings allow it.
      */
     fun enableLoginByFacebook()
 
     /**
-     * Shows the login by Github view.
+     * Shows the login by Github view if the server settings allow it.
      */
     fun enableLoginByGithub()
 
     /**
-     * Shows the login by Google view.
+     * Shows the login by Google view if the server settings allow it.
      */
     fun enableLoginByGoogle()
 
     /**
-     * Shows the login by Linkedin view.
+     * Shows the login by Linkedin view if the server settings allow it.
      */
     fun enableLoginByLinkedin()
 
     /**
-     * Shows the login by Meteor view.
+     * Shows the login by Meteor view if the server settings allow it.
      */
     fun enableLoginByMeteor()
 
     /**
-     * Shows the login by Twitter view.
+     * Shows the login by Twitter view if the server settings allow it.
      */
     fun enableLoginByTwitter()
 
     /**
-     * Shows the login by Gitlab view.
+     * Shows the login by Gitlab view if the server settings allow it.
      */
     fun enableLoginByGitlab()
 
     /**
-     * Shows the sign up view if the server settings allow the new users registration.
-     *
-     * @param value True to show the sign up view, false otherwise.
+     * Setups the FloatingActionButton to show more social accounts views (expanding the oauth view interface to show the remaining view(s)).
      */
-    fun showSignUpView(value: Boolean)
+    fun setupFabListener()
 
+    /**
+     * Hides the username/e-mail view.
+     */
+    fun hideUsernameOrEmailView()
+
+    /**
+     * Hides the password view.
+     */
+    fun hidePasswordView()
+
+    /**
+     * Hides the sign up view if the server settings does not allow the new users registration.
+     */
+    fun hideSignUpView()
+
+    /**
+     * Hides the oauth view.
+     */
+    fun hideOauthView()
+
+    /**
+     * Hides the login button.
+     */
+    fun hideLoginButton()
     /**
      * Alerts the user about a wrong inputted username or email.
      */

app/src/main/java/chat/rocket/android/authentication/login/ui/LoginFragment.kt

 package chat.rocket.android.authentication.login.ui
 
 import DrawableHelper
+import android.annotation.SuppressLint
 import android.content.Context
+import android.graphics.Bitmap
 import android.os.Build
 import android.os.Bundle
 import android.support.v4.app.Fragment
@@ -10,9 +12,10 @@ import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.ViewTreeObserver
+import android.webkit.WebView
+import android.webkit.WebViewClient
 import android.widget.ImageButton
 import android.widget.ScrollView
-
 import chat.rocket.android.R
 import chat.rocket.android.authentication.login.presentation.LoginPresenter
 import chat.rocket.android.authentication.login.presentation.LoginView
@@ -23,7 +26,6 @@ import chat.rocket.android.util.extensions.inflate
 import chat.rocket.android.util.extensions.setVisible
 import chat.rocket.android.util.extensions.showToast
 import chat.rocket.android.util.extensions.textContent
-
 import dagger.android.support.AndroidSupportInjection
 import kotlinx.android.synthetic.main.fragment_authentication_log_in.*
 import javax.inject.Inject
@@ -47,7 +49,8 @@ class LoginFragment : Fragment(), LoginView {
         AndroidSupportInjection.inject(this)
     }
 
-    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? = container?.inflate(R.layout.fragment_authentication_log_in)
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? =
+        container?.inflate(R.layout.fragment_authentication_log_in)
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
@@ -67,12 +70,6 @@ class LoginFragment : Fragment(), LoginView {
         setupSignUpListener()
     }
 
-    override fun onViewStateRestored(savedInstanceState: Bundle?) {
-        super.onViewStateRestored(savedInstanceState)
-
-        areLoginOptionsNeeded()
-    }
-
     override fun onDestroyView() {
         super.onDestroyView()
         if (isGlobalLayoutListenerSetUp) {
@@ -81,31 +78,30 @@ class LoginFragment : Fragment(), LoginView {
         }
     }
 
-    override fun showOauthView(value: Boolean) {
-        if (value) {
-            social_accounts_container.setVisible(true)
-            button_fab.setVisible(true)
-
-            // We need to setup the layout to hide and show the oauth interface when the soft keyboard is shown
-            // (means that the user touched the text_username_or_email or text_password EditText to fill that respective fields).
-            if (!isGlobalLayoutListenerSetUp) {
-                scroll_view.viewTreeObserver.addOnGlobalLayoutListener(layoutListener)
-                isGlobalLayoutListenerSetUp = true
-            }
-        } else {
-            social_accounts_container.setVisible(false)
-            button_fab.setVisible(false)
+    override fun showCasView(casUrl: String, requestedToken: String) {
+        activity?.apply {
+            // We need to update the view headline, since the CAS allows the log in or sign up
+            text_headline.textContent = getString(R.string.title_log_in_or_sign_up)
+            setupWebView(casUrl, requestedToken)
         }
     }
 
-    override fun setupFabListener() {
-        button_fab.setOnClickListener({
-            button_fab.hide()
-            showRemainingSocialAccountsView()
-            scrollToBottom()
-        })
+    override fun showSignUpView() = text_new_to_rocket_chat.setVisible(true)
+
+    override fun showOauthView() {
+        social_accounts_container.setVisible(true)
+        button_fab.setVisible(true)
+
+        // We need to setup the layout to hide and show the oauth interface when the soft keyboard is shown
+        // (means that the user touched the text_username_or_email or text_password EditText to fill that respective fields).
+        if (!isGlobalLayoutListenerSetUp) {
+            scroll_view.viewTreeObserver.addOnGlobalLayoutListener(layoutListener)
+            isGlobalLayoutListenerSetUp = true
+        }
     }
 
+    override fun showLoginButton() = button_log_in.setVisible(true)
+
     override fun enableLoginByFacebook() {
         button_facebook.isEnabled = true
     }
@@ -134,7 +130,26 @@ class LoginFragment : Fragment(), LoginView {
         button_gitlab.isEnabled = true
     }
 
-    override fun showSignUpView(value: Boolean) = text_new_to_rocket_chat.setVisible(value)
+    override fun setupFabListener() {
+        button_fab.setOnClickListener({
+            button_fab.hide()
+            showRemainingSocialAccountsView()
+            scrollToBottom()
+        })
+    }
+
+    override fun hideUsernameOrEmailView() = text_username_or_email.setVisible(false)
+
+    override fun hidePasswordView() = text_password.setVisible(false)
+
+    override fun hideSignUpView() = text_new_to_rocket_chat.setVisible(false)
+
+    override fun hideOauthView() {
+        social_accounts_container.setVisible(false)
+        button_fab.setVisible(false)
+    }
+
+    override fun hideLoginButton() = button_log_in.setVisible(false)
 
     override fun alertWrongUsernameOrEmail() {
         AnimationHelper.vibrateSmartPhone(appContext)
@@ -164,24 +179,25 @@ class LoginFragment : Fragment(), LoginView {
 
     override fun showGenericErrorMessage() = showMessage(getString(R.string.msg_generic_error))
 
-
-    override fun showNoInternetConnection() = showMessage(getString(R.string.msg_no_internet_connection))
+    override fun showNoInternetConnection() =
+        showMessage(getString(R.string.msg_no_internet_connection))
 
     private fun areLoginOptionsNeeded() {
         if (!isEditTextEmpty() || KeyboardHelper.isSoftKeyboardShown(scroll_view.rootView)) {
-            showSignUpView(false)
-            showOauthView(false)
-            showLoginButton(true)
+            hideSignUpView()
+            hideOauthView()
+            showLoginButton()
         } else {
-            showSignUpView(true)
-            showOauthView(true)
-            showLoginButton(false)
+            showSignUpView()
+            showOauthView()
+            hideLoginButton()
         }
     }
 
     private fun tintEditTextDrawableStart() {
         activity?.apply {
-            val personDrawable = DrawableHelper.getDrawableFromId(R.drawable.ic_assignment_ind_black_24dp, this)
+            val personDrawable =
+                DrawableHelper.getDrawableFromId(R.drawable.ic_assignment_ind_black_24dp, this)
             val lockDrawable = DrawableHelper.getDrawableFromId(R.drawable.ic_lock_black_24dp, this)
 
             val drawables = arrayOf(personDrawable, lockDrawable)
@@ -191,10 +207,6 @@ class LoginFragment : Fragment(), LoginView {
         }
     }
 
-    private fun showLoginButton(value: Boolean) {
-        button_log_in.setVisible(value)
-    }
-
     private fun setupSignUpListener() {
         val signUp = getString(R.string.title_sign_up)
         val newToRocketChat = String.format(getString(R.string.msg_new_user), signUp)
@@ -215,7 +227,8 @@ class LoginFragment : Fragment(), LoginView {
     }
 
     // Returns true if *all* EditTexts are empty.
-    private fun isEditTextEmpty(): Boolean = text_username_or_email.textContent.isBlank() && text_password.textContent.isEmpty()
+    private fun isEditTextEmpty(): Boolean =
+        text_username_or_email.textContent.isBlank() && text_password.textContent.isEmpty()
 
     private fun showRemainingSocialAccountsView() {
         social_accounts_container.postDelayed({
@@ -242,4 +255,33 @@ class LoginFragment : Fragment(), LoginView {
             scroll_view.fullScroll(ScrollView.FOCUS_DOWN)
         }, 1250)
     }
-}
+
+    @SuppressLint("SetJavaScriptEnabled")
+    private fun setupWebView(webPageUrl: String, requestedToken: String) {
+        web_view.settings.javaScriptEnabled = true
+        web_view.webViewClient = object : WebViewClient() {
+            override fun onPageStarted(view: WebView, url: String, favicon: Bitmap?) {
+                // The user can be already logged in the CAS, so check if the URL contains "ticket"
+                // (that means he/she is successful authenticated and we don't need to wait until the page is finished.
+                if (url.contains("ticket")) {
+                    authenticateWithCas(requestedToken)
+                }
+            }
+
+            override fun onPageFinished(view: WebView, url: String) {
+                if (url.contains("ticket")) {
+                    authenticateWithCas(requestedToken)
+                } else {
+                    hideLoading()
+                    web_view.setVisible(true)
+                }
+            }
+        }
+        web_view.loadUrl(webPageUrl)
+    }
+
+    private fun authenticateWithCas(requestedToken: String) {
+        web_view.setVisible(false)
+        presenter.authenticateWithCas(requestedToken)
+    }
+}
\ No newline at end of file

app/src/main/java/chat/rocket/android/helper/UrlHelper.kt

@@ -13,6 +13,17 @@ object UrlHelper {
      */
     fun getAvatarUrl(serverUrl: String, avatarName: String): String = removeTrailingSlash(serverUrl) + "/avatar/" + avatarName
 
+    /**
+     * Returns the CAS URL.
+     *
+     * @param casLoginUrl The CAS login URL from the server settings.
+     * @param serverUrl The server URL.
+     * @param token The token to be send to the CAS server.
+     * @return The avatar URL.
+     */
+    fun getCasUrl(casLoginUrl: String, serverUrl: String, token: String): String =
+        removeTrailingSlash(casLoginUrl) + "?service=" + removeTrailingSlash(serverUrl) + "/_cas/" + token
+
     /**
      * Returns the server's Terms of Service URL.
      *

app/src/main/java/chat/rocket/android/server/domain/RefreshSettingsInteractor.kt

@@ -14,10 +14,10 @@ class RefreshSettingsInteractor @Inject constructor(private val factory: RocketC
         SITE_URL, SITE_NAME, FAVICON_512, USE_REALNAME, ALLOW_ROOM_NAME_SPECIAL_CHARS,
         FAVORITE_ROOMS, ACCOUNT_LOGIN_FORM, ACCOUNT_GOOGLE, ACCOUNT_FACEBOOK, ACCOUNT_GITHUB,
         ACCOUNT_GITLAB, ACCOUNT_LINKEDIN, ACCOUNT_METEOR, ACCOUNT_TWITTER, ACCOUNT_WORDPRESS,
-        LDAP_ENABLE, ACCOUNT_REGISTRATION, UPLOAD_STORAGE_TYPE, UPLOAD_MAX_FILE_SIZE,
-        UPLOAD_WHITELIST_MIMETYPES, HIDE_USER_JOIN, HIDE_USER_LEAVE, HIDE_TYPE_AU, HIDE_MUTE_UNMUTE,
-        HIDE_TYPE_RU, ACCOUNT_CUSTOM_FIELDS, ALLOW_MESSAGE_DELETING, ALLOW_MESSAGE_EDITING,
-        ALLOW_MESSAGE_PINNING, SHOW_DELETED_STATUS, SHOW_EDITED_STATUS)
+        LDAP_ENABLE, CAS_ENABLE, CAS_LOGIN_URL, ACCOUNT_REGISTRATION, UPLOAD_STORAGE_TYPE,
+        UPLOAD_MAX_FILE_SIZE, UPLOAD_WHITELIST_MIMETYPES, HIDE_USER_JOIN, HIDE_USER_LEAVE,
+        HIDE_TYPE_AU, HIDE_MUTE_UNMUTE, HIDE_TYPE_RU, ACCOUNT_CUSTOM_FIELDS, ALLOW_MESSAGE_DELETING,
+        ALLOW_MESSAGE_EDITING, ALLOW_MESSAGE_PINNING, SHOW_DELETED_STATUS, SHOW_EDITED_STATUS)
 
     suspend fun refresh(server: String) {
         withContext(CommonPool) {

app/src/main/java/chat/rocket/android/server/domain/SettingsRepository.kt

@@ -29,6 +29,8 @@ const val USE_REALNAME = "UI_Use_Real_Name"
 const val ALLOW_ROOM_NAME_SPECIAL_CHARS = "UI_Allow_room_names_with_special_chars"
 const val FAVORITE_ROOMS = "Favorite_Rooms"
 const val LDAP_ENABLE = "LDAP_Enable"
+const val CAS_ENABLE = "CAS_enabled"
+const val CAS_LOGIN_URL = "CAS_login_url"
 const val UPLOAD_STORAGE_TYPE = "FileUpload_Storage_Type"
 const val UPLOAD_MAX_FILE_SIZE = "FileUpload_MaxFileSize"
 const val UPLOAD_WHITELIST_MIMETYPES = "FileUpload_MediaTypeWhiteList"
@@ -59,6 +61,8 @@ fun PublicSettings.wordpressEnabled(): Boolean = this[ACCOUNT_WORDPRESS]?.value
 
 fun PublicSettings.useRealName(): Boolean = this[USE_REALNAME]?.value == true
 fun PublicSettings.ldapEnabled(): Boolean = this[LDAP_ENABLE]?.value == true
+fun PublicSettings.casEnabled(): Boolean = this[CAS_ENABLE]?.value == true
+fun PublicSettings.casLoginUrl(): String = this[CAS_LOGIN_URL]?.value.toString()
 
 // Message settings
 fun PublicSettings.showDeletedStatus(): Boolean = this[SHOW_DELETED_STATUS]?.value == true

app/src/main/java/chat/rocket/android/util/extensions/Text.kt

@@ -9,6 +9,7 @@ import android.widget.TextView
 import chat.rocket.android.widget.emoji.EmojiParser
 import chat.rocket.android.widget.emoji.EmojiTypefaceSpan
 import ru.noties.markwon.Markwon
+import java.security.SecureRandom
 
 fun String.ifEmpty(value: String): String {
     if (isEmpty()) {
@@ -34,6 +35,17 @@ fun EditText.erase() {
 
 fun String.isEmailValid(): Boolean = Patterns.EMAIL_ADDRESS.matcher(this).matches()
 
+fun generateRandomString(stringLength: Int): String {
+    val base = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+    val secureRandom = SecureRandom()
+
+    val stringBuilder = StringBuilder(stringLength)
+    for (i in 0 until stringLength) {
+        stringBuilder.append(base[secureRandom.nextInt(base.length)])
+    }
+    return stringBuilder.toString()
+}
+
 var TextView.textContent: String
     get() = text.toString()
     set(value) {

app/src/main/res/layout/fragment_authentication_log_in.xml

@@ -11,7 +11,7 @@
     <android.support.constraint.ConstraintLayout
         android:id="@+id/middle_container"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content">
+        android:layout_height="match_parent">
 
         <TextView
             android:id="@+id/text_headline"
@@ -21,6 +21,21 @@
             app:layout_constraintRight_toRightOf="parent"
             app:layout_constraintTop_toTopOf="parent" />
 
+        <WebView
+            android:id="@+id/web_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_marginBottom="22dp"
+            android:layout_marginEnd="@dimen/screen_edge_left_and_right_margins"
+            android:layout_marginStart="@dimen/screen_edge_left_and_right_margins"
+            android:layout_marginTop="64dp"
+            android:visibility="gone"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintLeft_toLeftOf="parent"
+            app:layout_constraintRight_toRightOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/text_headline"
+            tools:visibility="visible" />
+
         <EditText
             android:id="@+id/text_username_or_email"
             style="@style/Authentication.EditText"

app/src/main/res/values-pt-rBR/strings.xml

@@ -4,6 +4,7 @@
     <string name="title_sign_in_your_server">Faça login no seu servidor</string>
     <string name="title_log_in">Entrar</string>
     <string name="title_sign_up">Inscreva-se</string>
+    <string name="title_log_in_or_sign_up">Entrar ou Inscrever-se</string>
     <string name="title_legal_terms">Termos Legais</string>
     <string name="title_chats">Chats</string>
     <string name="title_profile">Perfil</string>

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

@@ -5,6 +5,7 @@
     <string name="title_sign_in_your_server">Sign in your server</string>
     <string name="title_log_in">Log in</string>
     <string name="title_sign_up">Sign up</string>
+    <string name="title_log_in_or_sign_up">Log in or Sign up</string>
     <string name="title_legal_terms">Legal Terms</string>
     <string name="title_chats">Chats</string>
     <string name="title_profile">Profile</string>