Add basic session management to avoid login each time

app/src/main/java/im/vector/riotredesign/features/login/LoginActivity.kt

@@ -23,6 +23,7 @@ class LoginActivity : RiotActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_login)
         authenticateButton.setOnClickListener { authenticate() }
+        checkActiveSessions()
     }
 
     private fun authenticate() {
@@ -48,6 +49,13 @@ class LoginActivity : RiotActivity() {
         })
     }
 
+    private fun checkActiveSessions() {
+        if (authenticator.hasActiveSessions()) {
+            matrix.currentSession = authenticator.getLastActiveSession()
+            goToHomeScreen()
+        }
+    }
+
     private fun goToHomeScreen() {
         val intent = HomeActivity.newIntent(this)
         startActivity(intent)

matrix-sdk-android/src/main/java/im/vector/matrix/android/api/auth/Authenticator.kt

@@ -1,12 +1,17 @@
 package im.vector.matrix.android.api.auth
 
 import im.vector.matrix.android.api.MatrixCallback
-import im.vector.matrix.android.api.session.Session
 import im.vector.matrix.android.api.auth.data.HomeServerConnectionConfig
+import im.vector.matrix.android.api.session.Session
 import im.vector.matrix.android.api.util.Cancelable
 
 interface Authenticator {
 
     fun authenticate(homeServerConnectionConfig: HomeServerConnectionConfig, login: String, password: String, callback: MatrixCallback<Session>): Cancelable
 
+    fun hasActiveSessions(): Boolean
+
+    fun getLastActiveSession(): Session?
+
+
 }

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/auth/DefaultAuthenticator.kt

@@ -25,6 +25,17 @@ class DefaultAuthenticator(private val retrofitBuilder: Retrofit.Builder,
                            private val coroutineDispatchers: MatrixCoroutineDispatchers,
                            private val sessionParamsStore: SessionParamsStore) : Authenticator {
 
+    override fun hasActiveSessions(): Boolean {
+        return sessionParamsStore.get() != null
+    }
+
+    override fun getLastActiveSession(): Session? {
+        val sessionParams = sessionParamsStore.get()
+        return sessionParams?.let {
+            DefaultSession(it)
+        }
+    }
+
     override fun authenticate(homeServerConnectionConfig: HomeServerConnectionConfig, login: String, password: String, callback: MatrixCallback<Session>): Cancelable {
         val authAPI = buildAuthAPI(homeServerConnectionConfig)
 

matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/session/DefaultSession.kt

@@ -20,7 +20,7 @@ class DefaultSession(sessionParams: SessionParams) : Session, KoinComponent {
         val sessionModule = SessionModule(sessionParams)
         val syncModule = SyncModule()
         StandAloneContext.loadKoinModules(listOf(sessionModule, syncModule))
-        scope = getKoin().createScope(SCOPE)
+        scope = getKoin().getOrCreateScope(SCOPE)
     }
 
     override fun synchronizer(): Synchronizer {