Add mobile access managment (#344)

.circleci/config.yml

@@ -7,7 +7,7 @@ references:
 
   container_config: &container_config
     docker:
-      - image: circleci/android:api-28
+      - image: circleci/android@sha256:5cdc8626cc6f13efe5ed982cdcdb432b0472f8740fed8743a6461e025ad6cdfc
     working_directory: *workspace_root
     environment:
       environment:
@@ -93,6 +93,9 @@ jobs:
     <<: *container_config
     steps:
       - *attach_workspace
+      - run:
+          name: Accept licenses
+          command: yes | sdkmanager --licenses && yes | sdkmanager --update
       - run:
           name: Setup emulator
           command: sdkmanager "system-images;android-19;default;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-19;default;armeabi-v7a"

app/build.gradle

@@ -85,7 +85,7 @@ play {
 }
 
 dependencies {
-    implementation 'com.github.wulkanowy:api:c84356f'
+    implementation 'com.github.wulkanowy:api:d08b71b'
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"
     implementation "androidx.legacy:legacy-support-v4:1.0.0"

app/src/androidTest/java/io/github/wulkanowy/data/db/migrations/AbstractMigrationTest.kt

@@ -25,7 +25,8 @@ abstract class AbstractMigrationTest {
             .addMigrations(
                 Migration12(),
                 Migration13(),
-                Migration14()
+                Migration14(),
+                Migration15()
             )
             .build()
         // close the database and release any stream resources when the test finishes

app/src/main/java/io/github/wulkanowy/data/RepositoryModule.kt

@@ -132,4 +132,8 @@ internal class RepositoryModule {
     @Singleton
     @Provides
     fun provideRecipientDao(database: AppDatabase) = database.recipientDao
+
+    @Singleton
+    @Provides
+    fun provideMobileDevicesDao(database: AppDatabase) = database.mobileDeviceDao
 }

app/src/main/java/io/github/wulkanowy/data/db/AppDatabase.kt

@@ -16,6 +16,7 @@ import io.github.wulkanowy.data.db.dao.GradeSummaryDao
 import io.github.wulkanowy.data.db.dao.HomeworkDao
 import io.github.wulkanowy.data.db.dao.LuckyNumberDao
 import io.github.wulkanowy.data.db.dao.MessagesDao
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
 import io.github.wulkanowy.data.db.dao.NoteDao
 import io.github.wulkanowy.data.db.dao.RecipientDao
 import io.github.wulkanowy.data.db.dao.ReportingUnitDao
@@ -33,6 +34,7 @@ import io.github.wulkanowy.data.db.entities.GradeSummary
 import io.github.wulkanowy.data.db.entities.Homework
 import io.github.wulkanowy.data.db.entities.LuckyNumber
 import io.github.wulkanowy.data.db.entities.Message
+import io.github.wulkanowy.data.db.entities.MobileDevice
 import io.github.wulkanowy.data.db.entities.Note
 import io.github.wulkanowy.data.db.entities.Recipient
 import io.github.wulkanowy.data.db.entities.ReportingUnit
@@ -45,6 +47,7 @@ import io.github.wulkanowy.data.db.migrations.Migration11
 import io.github.wulkanowy.data.db.migrations.Migration12
 import io.github.wulkanowy.data.db.migrations.Migration13
 import io.github.wulkanowy.data.db.migrations.Migration14
+import io.github.wulkanowy.data.db.migrations.Migration15
 import io.github.wulkanowy.data.db.migrations.Migration2
 import io.github.wulkanowy.data.db.migrations.Migration3
 import io.github.wulkanowy.data.db.migrations.Migration4
@@ -74,7 +77,8 @@ import javax.inject.Singleton
         LuckyNumber::class,
         CompletedLesson::class,
         ReportingUnit::class,
-        Recipient::class
+        Recipient::class,
+        MobileDevice::class
     ],
     version = AppDatabase.VERSION_SCHEMA,
     exportSchema = true
@@ -83,7 +87,7 @@ import javax.inject.Singleton
 abstract class AppDatabase : RoomDatabase() {
 
     companion object {
-        const val VERSION_SCHEMA = 14
+        const val VERSION_SCHEMA = 15
 
         fun newInstance(context: Context): AppDatabase {
             return Room.databaseBuilder(context, AppDatabase::class.java, "wulkanowy_database")
@@ -103,7 +107,8 @@ abstract class AppDatabase : RoomDatabase() {
                     Migration11(),
                     Migration12(),
                     Migration13(),
-                    Migration14()
+                    Migration14(),
+                    Migration15()
                 )
                 .build()
         }
@@ -142,4 +147,6 @@ abstract class AppDatabase : RoomDatabase() {
     abstract val reportingUnitDao: ReportingUnitDao
 
     abstract val recipientDao: RecipientDao
+
+    abstract val mobileDeviceDao: MobileDeviceDao
 }

app/src/main/java/io/github/wulkanowy/data/db/dao/MobileDeviceDao.kt

@@ -0,0 +1,21 @@
+package io.github.wulkanowy.data.db.dao
+
+import androidx.room.Dao
+import androidx.room.Delete
+import androidx.room.Insert
+import androidx.room.Query
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.reactivex.Maybe
+
+@Dao
+interface MobileDeviceDao {
+
+    @Insert
+    fun insertAll(devices: List<MobileDevice>)
+
+    @Delete
+    fun deleteAll(devices: List<MobileDevice>)
+
+    @Query("SELECT * FROM MobileDevices WHERE student_id = :studentId ORDER BY date DESC")
+    fun loadAll(studentId: Int): Maybe<List<MobileDevice>>
+}

app/src/main/java/io/github/wulkanowy/data/db/entities/MobileDevice.kt

@@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.db.entities
+
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+import org.threeten.bp.LocalDateTime
+import java.io.Serializable
+
+@Entity(tableName = "MobileDevices")
+data class MobileDevice(
+
+    @ColumnInfo(name = "student_id")
+    val studentId: Int,
+
+    @ColumnInfo(name = "device_id")
+    val deviceId: Int,
+
+    val name: String,
+
+    val date: LocalDateTime
+) : Serializable {
+
+    @PrimaryKey(autoGenerate = true)
+    var id: Long = 0
+}

app/src/main/java/io/github/wulkanowy/data/db/migrations/Migration15.kt

@@ -0,0 +1,19 @@
+package io.github.wulkanowy.data.db.migrations
+
+import androidx.room.migration.Migration
+import androidx.sqlite.db.SupportSQLiteDatabase
+
+class Migration15 : Migration(14, 15) {
+
+    override fun migrate(database: SupportSQLiteDatabase) {
+        database.execSQL("""
+            CREATE TABLE IF NOT EXISTS MobileDevices (
+                id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                student_id INTEGER NOT NULL,
+                device_id INTEGER NOT NULL,
+                name TEXT NOT NULL,
+                date INTEGER NOT NULL
+            )
+        """)
+    }
+}

app/src/main/java/io/github/wulkanowy/data/pojos/MobileDeviceToken.kt

@@ -0,0 +1,12 @@
+package io.github.wulkanowy.data.pojos
+
+data class MobileDeviceToken(
+
+    val token: String,
+
+    val symbol: String,
+
+    val pin: String,
+
+    val qr: String
+)

app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceLocal.kt

@@ -0,0 +1,25 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.data.db.dao.MobileDeviceDao
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.db.entities.Student
+import io.reactivex.Maybe
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceLocal @Inject constructor(private val mobileDb: MobileDeviceDao) {
+
+    fun saveDevices(devices: List<MobileDevice>) {
+        mobileDb.insertAll(devices)
+    }
+
+    fun deleteDevices(devices: List<MobileDevice>) {
+        mobileDb.deleteAll(devices)
+    }
+
+    fun getDevices(semester: Semester): Maybe<List<MobileDevice>> {
+        return mobileDb.loadAll(semester.studentId).filter { it.isNotEmpty() }
+    }
+}

app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRemote.kt

@@ -0,0 +1,47 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import io.github.wulkanowy.api.Api
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.utils.toLocalDateTime
+import io.reactivex.Single
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRemote @Inject constructor(private val api: Api) {
+
+    fun getDevices(semester: Semester): Single<List<MobileDevice>> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.getRegisteredDevices() }
+            .map { devices ->
+                devices.map {
+                    MobileDevice(
+                        studentId = semester.studentId,
+                        date = it.date.toLocalDateTime(),
+                        deviceId = it.id,
+                        name = it.name
+                    )
+                }
+            }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.unregisterDevice(device.deviceId) }
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return Single.just(api.apply { diaryId = semester.diaryId })
+            .flatMap { api.getToken() }
+            .map {
+                MobileDeviceToken(
+                    token = it.token,
+                    symbol = it.symbol,
+                    pin = it.pin,
+                    qr = it.qrCodeImage
+                )
+            }
+    }
+}

app/src/main/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepository.kt

@@ -0,0 +1,44 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import com.github.pwittchen.reactivenetwork.library.rx2.ReactiveNetwork
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.utils.uniqueSubtract
+import io.reactivex.Single
+import java.net.UnknownHostException
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class MobileDeviceRepository @Inject constructor(
+    private val settings: InternetObservingSettings,
+    private val local: MobileDeviceLocal,
+    private val remote: MobileDeviceRemote
+) {
+
+    fun getDevices(semester: Semester, forceRefresh: Boolean = false): Single<List<MobileDevice>> {
+        return local.getDevices(semester).filter { !forceRefresh }
+            .switchIfEmpty(ReactiveNetwork.checkInternetConnectivity(settings)
+                .flatMap {
+                    if (it) remote.getDevices(semester)
+                    else Single.error(UnknownHostException())
+                }.flatMap { new ->
+                    local.getDevices(semester).toSingle(emptyList())
+                        .doOnSuccess { old ->
+                            local.deleteDevices(old uniqueSubtract new)
+                            local.saveDevices(new uniqueSubtract old)
+                        }
+                }
+            ).flatMap { local.getDevices(semester).toSingle(emptyList()) }
+    }
+
+    fun unregisterDevice(semester: Semester, device: MobileDevice): Single<Boolean> {
+        return remote.unregisterDevice(semester, device)
+    }
+
+    fun getToken(semester: Semester): Single<MobileDeviceToken> {
+        return remote.getToken(semester)
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/main/MainModule.kt

@@ -19,6 +19,9 @@ import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.message.MessageFragment
 import io.github.wulkanowy.ui.modules.message.MessageModule
 import io.github.wulkanowy.ui.modules.message.preview.MessagePreviewFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceModule
 import io.github.wulkanowy.ui.modules.more.MoreFragment
 import io.github.wulkanowy.ui.modules.note.NoteFragment
 import io.github.wulkanowy.ui.modules.settings.SettingsFragment
@@ -97,4 +100,12 @@ abstract class MainModule {
     @PerFragment
     @ContributesAndroidInjector
     abstract fun bindAccountDialog(): AccountDialog
+
+    @PerFragment
+    @ContributesAndroidInjector(modules = [MobileDeviceModule::class])
+    abstract fun bindMobileDevices(): MobileDeviceFragment
+
+    @PerFragment
+    @ContributesAndroidInjector
+    abstract fun bindMobileDeviceDialog(): MobileDeviceTokenDialog
 }

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceAdapter.kt

@@ -0,0 +1,10 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.IFlexible
+import io.github.wulkanowy.data.db.entities.MobileDevice
+
+class MobileDeviceAdapter<T : IFlexible<*>> : FlexibleAdapter<T>(null, null, true) {
+
+    var onDeviceUnregisterListener: (MobileDevice, position: Int) -> Unit = {  _, _ -> }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceFragment.kt

@@ -0,0 +1,114 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import eu.davidea.flexibleadapter.common.FlexibleItemDecoration
+import eu.davidea.flexibleadapter.common.SmoothScrollLinearLayoutManager
+import eu.davidea.flexibleadapter.helpers.EmptyViewHelper
+import eu.davidea.flexibleadapter.helpers.UndoHelper
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import io.github.wulkanowy.R
+import io.github.wulkanowy.ui.base.BaseFragment
+import io.github.wulkanowy.ui.modules.main.MainActivity
+import io.github.wulkanowy.ui.modules.main.MainView
+import io.github.wulkanowy.ui.modules.mobiledevice.token.MobileDeviceTokenDialog
+import kotlinx.android.synthetic.main.fragment_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceFragment : BaseFragment(), MobileDeviceView, MainView.TitledView {
+
+    @Inject
+    lateinit var presenter: MobileDevicePresenter
+
+    @Inject
+    lateinit var devicesAdapter: MobileDeviceAdapter<AbstractFlexibleItem<*>>
+
+    companion object {
+        fun newInstance() = MobileDeviceFragment()
+    }
+
+    override val titleStringId: Int
+        get() = R.string.mobile_devices_title
+
+    override val isViewEmpty: Boolean
+        get() = devicesAdapter.isEmpty
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.fragment_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        messageContainer = mobileDevicesRecycler
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        mobileDevicesRecycler.run {
+            layoutManager = SmoothScrollLinearLayoutManager(context)
+            adapter = devicesAdapter
+            addItemDecoration(FlexibleItemDecoration(context)
+                .withDefaultDivider()
+                .withDrawDividerOnLastItem(false)
+            )
+        }
+        EmptyViewHelper.create(devicesAdapter, mobileDevicesEmpty)
+        mobileDevicesSwipe.setOnRefreshListener { presenter.onSwipeRefresh() }
+        mobileDeviceAddButton.setOnClickListener { presenter.onRegisterDevice() }
+        devicesAdapter.run {
+            isPermanentDelete = false
+            onDeviceUnregisterListener = { device, position ->
+                val onActionListener = object : UndoHelper.OnActionListener {
+                    override fun onActionConfirmed(action: Int, event: Int) {
+                        presenter.onUnregister(device)
+                    }
+
+                    override fun onActionCanceled(action: Int, positions: MutableList<Int>?) {
+                        devicesAdapter.restoreDeletedItems()
+                    }
+                }
+                UndoHelper(devicesAdapter, onActionListener)
+                    .withConsecutive(false)
+                    .withAction(UndoHelper.Action.REMOVE)
+                    .start(listOf(position), mobileDevicesRecycler, R.string.mobile_device_removed, R.string.all_undo, 3000)
+            }
+        }
+    }
+
+    override fun updateData(data: List<MobileDeviceItem>) {
+        devicesAdapter.updateDataSet(data)
+    }
+
+    override fun clearData() {
+        devicesAdapter.clear()
+    }
+
+    override fun hideRefresh() {
+        mobileDevicesSwipe.isRefreshing = false
+    }
+
+    override fun showProgress(show: Boolean) {
+        mobileDevicesProgress.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun enableSwipe(enable: Boolean) {
+        mobileDevicesSwipe.isEnabled = enable
+    }
+
+    override fun showContent(show: Boolean) {
+        mobileDevicesRecycler.visibility = if (show) VISIBLE else GONE
+    }
+
+    override fun showTokenDialog() {
+        (activity as? MainActivity)?.showDialogFragment(MobileDeviceTokenDialog.newInstance())
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceItem.kt

@@ -0,0 +1,53 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import android.view.View
+import eu.davidea.flexibleadapter.FlexibleAdapter
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+import eu.davidea.flexibleadapter.items.IFlexible
+import eu.davidea.viewholders.FlexibleViewHolder
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.utils.toFormattedString
+import kotlinx.android.extensions.LayoutContainer
+import kotlinx.android.synthetic.main.item_mobile_device.*
+
+class MobileDeviceItem(val device: MobileDevice) : AbstractFlexibleItem<MobileDeviceItem.ViewHolder>() {
+
+    override fun getLayoutRes() = R.layout.item_mobile_device
+
+    override fun createViewHolder(view: View, adapter: FlexibleAdapter<IFlexible<*>>): ViewHolder {
+        return ViewHolder(view, adapter)
+    }
+
+    override fun bindViewHolder(adapter: FlexibleAdapter<IFlexible<*>>, holder: ViewHolder, position: Int, payloads: MutableList<Any>?) {
+        holder.apply {
+            mobileDeviceItemDate.text = device.date.toFormattedString("dd.MM.yyyy HH:mm:ss")
+            mobileDeviceItemName.text = device.name
+            mobileDeviceItemUnregister.setOnClickListener {
+                (adapter as MobileDeviceAdapter).onDeviceUnregisterListener(device, holder.flexibleAdapterPosition)
+            }
+        }
+    }
+
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (javaClass != other?.javaClass) return false
+
+        other as MobileDeviceItem
+
+        if (device.id != other.device.id) return false
+        return true
+    }
+
+    override fun hashCode(): Int {
+        var result = device.hashCode()
+        result = 31 * result + device.id.toInt()
+        return result
+    }
+
+    class ViewHolder(val view: View, adapter: FlexibleAdapter<*>) : FlexibleViewHolder(view, adapter), LayoutContainer {
+
+        override val containerView: View
+            get() = contentView
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceModule.kt

@@ -0,0 +1,12 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import dagger.Module
+import dagger.Provides
+import eu.davidea.flexibleadapter.items.AbstractFlexibleItem
+
+@Module
+class MobileDeviceModule {
+
+    @Provides
+    fun provideMobileDeviceFlexibleAdapter() = MobileDeviceAdapter<AbstractFlexibleItem<*>>()
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDevicePresenter.kt

@@ -0,0 +1,94 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDevicePresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceView>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: MobileDeviceView) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        loadData()
+    }
+
+    fun onSwipeRefresh() {
+        loadData(true)
+    }
+
+    private fun loadData(forceRefresh: Boolean = false) {
+        Timber.i("Loading mobile devices data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getDevices(it, forceRefresh) }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    hideRefresh()
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }.subscribe({
+                Timber.i("Loading mobile devices result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                }
+                analytics.logEvent("load_devices", "items" to it.size, "force_refresh" to forceRefresh)
+            }) {
+                Timber.i("Loading mobile devices result: An exception occurred")
+                errorHandler.dispatch(it)
+            })
+    }
+
+    fun onRegisterDevice() {
+        view?.showTokenDialog()
+    }
+
+    fun onUnregister(device: MobileDevice) {
+        Timber.i("Unregister device started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { semester ->
+                mobileDeviceRepository.unregisterDevice(semester, device)
+                .flatMap { mobileDeviceRepository.getDevices(semester, it) }
+            }
+            .map { items -> items.map { MobileDeviceItem(it) } }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally {
+                view?.run {
+                    showProgress(false)
+                    enableSwipe(true)
+                }
+            }
+            .subscribe({
+                Timber.i("Unregister device result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent(it.isNotEmpty())
+                }
+            }) {
+                Timber.i("Unregister device result: An exception occurred")
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/MobileDeviceView.kt

@@ -0,0 +1,24 @@
+package io.github.wulkanowy.ui.modules.mobiledevice
+
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceView : BaseView {
+
+    val isViewEmpty: Boolean
+
+    fun initView()
+
+    fun updateData(data: List<MobileDeviceItem>)
+
+    fun hideRefresh()
+
+    fun clearData()
+
+    fun showProgress(show: Boolean)
+
+    fun enableSwipe(enable: Boolean)
+
+    fun showContent(show: Boolean)
+
+    fun showTokenDialog()
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenDialog.kt

@@ -0,0 +1,89 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import android.util.Base64
+import android.view.LayoutInflater
+import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
+import android.view.ViewGroup
+import android.widget.Toast
+import dagger.android.support.DaggerDialogFragment
+import io.github.wulkanowy.R
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRemote
+import io.github.wulkanowy.ui.base.BaseActivity
+import kotlinx.android.synthetic.main.dialog_mobile_device.*
+import javax.inject.Inject
+
+class MobileDeviceTokenDialog : DaggerDialogFragment(), MobileDeviceTokenVIew {
+
+    @Inject
+    lateinit var presenter: MobileDeviceTokenPresenter
+
+    companion object {
+        fun newInstance(): MobileDeviceTokenDialog = MobileDeviceTokenDialog()
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setStyle(STYLE_NO_TITLE, 0)
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
+        return inflater.inflate(R.layout.dialog_mobile_device, container, false)
+    }
+
+    override fun onActivityCreated(savedInstanceState: Bundle?) {
+        super.onActivityCreated(savedInstanceState)
+        presenter.onAttachView(this)
+    }
+
+    override fun initView() {
+        mobileDeviceDialogClose.setOnClickListener { dismiss() }
+    }
+
+    override fun updateData(token: MobileDeviceToken) {
+        mobileDeviceDialogToken.text = token.token
+        mobileDeviceDialogSymbol.text = token.symbol
+        mobileDeviceDialogPin.text = token.pin
+
+        mobileDeviceQr.setImageBitmap(Base64.decode(token.qr, Base64.DEFAULT).let {
+            BitmapFactory.decodeByteArray(it, 0, it.size)
+        })
+    }
+
+    override fun hideLoading() {
+        mobileDeviceDialogProgress.visibility = GONE
+    }
+
+    override fun showContent() {
+        mobileDeviceDialogContent.visibility = VISIBLE
+    }
+
+    override fun closeDialog() {
+        dismiss()
+    }
+
+    override fun showError(text: String, error: Throwable) {
+        showMessage(text)
+    }
+
+    override fun showMessage(text: String) {
+        Toast.makeText(context, text, Toast.LENGTH_LONG).show()
+    }
+
+    override fun showExpiredDialog() {
+        (activity as? BaseActivity<*>)?.showExpiredDialog()
+    }
+
+    override fun openClearLoginView() {
+        (activity as? BaseActivity<*>)?.openClearLoginView()
+    }
+
+    override fun onDestroyView() {
+        presenter.onDetachView()
+        super.onDestroyView()
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenPresenter.kt

@@ -0,0 +1,51 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.repositories.mobiledevice.MobileDeviceRepository
+import io.github.wulkanowy.data.repositories.semester.SemesterRepository
+import io.github.wulkanowy.data.repositories.student.StudentRepository
+import io.github.wulkanowy.ui.base.BasePresenter
+import io.github.wulkanowy.ui.base.ErrorHandler
+import io.github.wulkanowy.utils.FirebaseAnalyticsHelper
+import io.github.wulkanowy.utils.SchedulersProvider
+import timber.log.Timber
+import javax.inject.Inject
+
+class MobileDeviceTokenPresenter @Inject constructor(
+    schedulers: SchedulersProvider,
+    errorHandler: ErrorHandler,
+    studentRepository: StudentRepository,
+    private val semesterRepository: SemesterRepository,
+    private val mobileDeviceRepository: MobileDeviceRepository,
+    private val analytics: FirebaseAnalyticsHelper
+) : BasePresenter<MobileDeviceTokenVIew>(errorHandler, studentRepository, schedulers) {
+
+    override fun onAttachView(view: MobileDeviceTokenVIew) {
+        super.onAttachView(view)
+        view.initView()
+        Timber.i("Mobile device view was initialized")
+        loadData()
+    }
+
+    private fun loadData() {
+        Timber.i("Mobile device registration data started")
+        disposable.add(studentRepository.getCurrentStudent()
+            .flatMap { semesterRepository.getCurrentSemester(it) }
+            .flatMap { mobileDeviceRepository.getToken(it) }
+            .subscribeOn(schedulers.backgroundThread)
+            .observeOn(schedulers.mainThread)
+            .doFinally { view?.hideLoading() }
+            .subscribe({
+                Timber.i("Mobile device registration result: Success")
+                view?.run {
+                    updateData(it)
+                    showContent()
+                }
+                analytics.logEvent("device_register", "symbol" to it.token.substring(0, 3))
+            }) {
+                Timber.i("Mobile device registration result: An exception occurred")
+                view?.closeDialog()
+                errorHandler.dispatch(it)
+            }
+        )
+    }
+}

app/src/main/java/io/github/wulkanowy/ui/modules/mobiledevice/token/MobileDeviceTokenVIew.kt

@@ -0,0 +1,17 @@
+package io.github.wulkanowy.ui.modules.mobiledevice.token
+
+import io.github.wulkanowy.data.pojos.MobileDeviceToken
+import io.github.wulkanowy.ui.base.BaseView
+
+interface MobileDeviceTokenVIew : BaseView {
+
+    fun initView()
+
+    fun hideLoading()
+
+    fun showContent()
+
+    fun closeDialog()
+
+    fun updateData(token: MobileDeviceToken)
+}

app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreFragment.kt

@@ -17,6 +17,7 @@ import io.github.wulkanowy.ui.modules.luckynumber.LuckyNumberFragment
 import io.github.wulkanowy.ui.modules.main.MainActivity
 import io.github.wulkanowy.ui.modules.main.MainView
 import io.github.wulkanowy.ui.modules.message.MessageFragment
+import io.github.wulkanowy.ui.modules.mobiledevice.MobileDeviceFragment
 import io.github.wulkanowy.ui.modules.note.NoteFragment
 import io.github.wulkanowy.ui.modules.settings.SettingsFragment
 import io.github.wulkanowy.utils.setOnItemClickListener
@@ -69,6 +70,14 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
             }
         }
 
+    override val mobileDevicesRes: Pair<String, Drawable?>?
+        get() {
+            return context?.run {
+                getString(R.string.mobile_devices_title) to
+                    ContextCompat.getDrawable(this, R.drawable.ic_menu_main_mobile_devices_24dp)
+            }
+        }
+
     override val settingsRes: Pair<String, Drawable?>?
         get() {
             return context?.run {
@@ -127,6 +136,10 @@ class MoreFragment : BaseFragment(), MoreView, MainView.TitledView, MainView.Mai
         (activity as? MainActivity)?.pushView(LuckyNumberFragment.newInstance())
     }
 
+    override fun openMobileDevicesView() {
+        (activity as? MainActivity)?.pushView(MobileDeviceFragment.newInstance())
+    }
+
     override fun openSettingsView() {
         (activity as? MainActivity)?.pushView(SettingsFragment.newInstance())
     }

app/src/main/java/io/github/wulkanowy/ui/modules/more/MorePresenter.kt

@@ -30,6 +30,7 @@ class MorePresenter @Inject constructor(
                     homeworkRes?.first -> openHomeworkView()
                     noteRes?.first -> openNoteView()
                     luckyNumberRes?.first -> openLuckyNumberView()
+                    mobileDevicesRes?.first -> openMobileDevicesView()
                     settingsRes?.first -> openSettingsView()
                     aboutRes?.first -> openAboutView()
                 }
@@ -50,6 +51,7 @@ class MorePresenter @Inject constructor(
                 homeworkRes?.let { MoreItem(it.first, it.second) },
                 noteRes?.let { MoreItem(it.first, it.second) },
                 luckyNumberRes?.let { MoreItem(it.first, it.second) },
+                mobileDevicesRes?.let { MoreItem(it.first, it.second) },
                 settingsRes?.let { MoreItem(it.first, it.second) },
                 aboutRes?.let { MoreItem(it.first, it.second) })
             )

app/src/main/java/io/github/wulkanowy/ui/modules/more/MoreView.kt

@@ -13,6 +13,8 @@ interface MoreView : BaseView {
 
     val luckyNumberRes: Pair<String, Drawable?>?
 
+    val mobileDevicesRes: Pair<String, Drawable?>?
+
     val settingsRes: Pair<String, Drawable?>?
 
     val aboutRes: Pair<String, Drawable?>?
@@ -34,4 +36,6 @@ interface MoreView : BaseView {
     fun openNoteView()
 
     fun openLuckyNumberView()
+
+    fun openMobileDevicesView()
 }

app/src/main/res/drawable/ic_all_add_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>

app/src/main/res/drawable/ic_menu_main_mobile_devices_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M4,6h18L22,4L4,4c-1.1,0 -2,0.9 -2,2v11L0,17v3h14v-3L4,17L4,6zM23,8h-6c-0.55,0 -1,0.45 -1,1v10c0,0.55 0.45,1 1,1h6c0.55,0 1,-0.45 1,-1L24,9c0,-0.55 -0.45,-1 -1,-1zM22,17h-4v-7h4v7z"/>
+</vector>

app/src/main/res/drawable/ic_message_delete_24dp.xml

@@ -1,10 +1,9 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-    android:tint="#FFFFFF"
     android:viewportWidth="24.0"
     android:viewportHeight="24.0">
     <path
-        android:fillColor="#FF000000"
+        android:fillColor="#000"
         android:pathData="M6,19c0,1.1 0.9,2 2,2h8c1.1,0 2,-0.9 2,-2V7H6v12zM19,4h-3.5l-1,-1h-5l-1,1H5v2h14V4z" />
 </vector>

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

@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.mobiledevice.token.MobileDeviceTokenDialog">
+
+    <FrameLayout
+        android:layout_width="300dp"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="20dp">
+
+        <LinearLayout
+            android:id="@+id/mobileDeviceDialogContent"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:visibility="invisible"
+            tools:visibility="visible">
+
+            <ImageView
+                android:id="@+id/mobileDeviceQr"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:adjustViewBounds="true"
+                android:layout_gravity="center"
+                android:contentDescription="@string/mobile_device_qr"
+                android:layout_marginBottom="12dp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/mobile_device_token"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogToken"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:text="@string/mobile_device_symbol"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogSymbol"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="10dp"
+                android:text="@string/mobile_device_pin"
+                android:textSize="17sp" />
+
+            <TextView
+                android:id="@+id/mobileDeviceDialogPin"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="3dp"
+                android:text="@string/all_no_data"
+                android:textIsSelectable="true"
+                android:textSize="12sp" />
+
+            <Button
+                android:id="@+id/mobileDeviceDialogClose"
+                style="@style/Widget.AppCompat.Button.Borderless"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="end"
+                android:layout_marginTop="15dp"
+                android:text="@string/all_close"
+                android:textAllCaps="true"
+                android:textSize="15sp" />
+        </LinearLayout>
+
+        <ProgressBar
+            android:id="@+id/mobileDeviceDialogProgress"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:indeterminate="true"
+            tools:visibility="invisible" />
+    </FrameLayout>
+</ScrollView>

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

@@ -0,0 +1,65 @@
+<androidx.coordinatorlayout.widget.CoordinatorLayout 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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ui.modules.mobiledevice.MobileDeviceFragment">
+
+    <ProgressBar
+        android:id="@+id/mobileDevicesProgress"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:indeterminate="true"
+        tools:visibility="invisible" />
+
+    <LinearLayout
+        android:id="@+id/mobileDevicesEmpty"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:padding="10dp"
+        android:alpha="0.0">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="20dp"
+            android:gravity="center"
+            android:text="@string/mobile_devices_no_items"
+            android:textSize="20sp" />
+
+        <ImageView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:minWidth="100dp"
+            android:minHeight="100dp"
+            app:srcCompat="@drawable/ic_menu_main_mobile_devices_24dp"
+            app:tint="?android:attr/textColorPrimary"
+            tools:ignore="contentDescription" />
+    </LinearLayout>
+
+    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
+        android:id="@+id/mobileDevicesSwipe"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/mobileDevicesRecycler"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            tools:listitem="@layout/item_mobile_device" />
+    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>
+
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/mobileDeviceAddButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|end"
+        android:layout_margin="16dp"
+        android:clickable="true"
+        android:focusable="true"
+        android:tint="#FFFFFF"
+        app:srcCompat="@drawable/ic_all_add_24dp" />
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -0,0 +1,52 @@
+<RelativeLayout 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/mobileDevice_subitem_container"
+    android:layout_width="match_parent"
+    android:layout_height="64dp"
+    tools:context=".ui.modules.mobiledevice.MobileDeviceItem">
+
+    <TextView
+        android:id="@+id/mobileDeviceItemName"
+        android:layout_width="match_parent"
+        android:layout_height="32dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginLeft="16dp"
+        android:layout_toStartOf="@id/mobileDeviceItemUnregister"
+        android:layout_toLeftOf="@id/mobileDeviceItemUnregister"
+        android:ellipsize="end"
+        android:gravity="bottom"
+        android:maxLines="1"
+        android:textSize="16sp"
+        tools:text="@tools:sample/lorem/random" />
+
+    <TextView
+        android:id="@+id/mobileDeviceItemDate"
+        android:layout_width="match_parent"
+        android:layout_height="20dp"
+        android:layout_below="@id/mobileDeviceItemName"
+        android:layout_marginStart="16dp"
+        android:layout_marginLeft="16dp"
+        android:layout_toStartOf="@id/mobileDeviceItemUnregister"
+        android:layout_toLeftOf="@id/mobileDeviceItemUnregister"
+        android:gravity="bottom"
+        android:textColor="?android:textColorSecondary"
+        android:textSize="14sp"
+        tools:text="@tools:sample/date/ddmmyy" />
+
+    <ImageButton
+        android:id="@+id/mobileDeviceItemUnregister"
+        android:layout_width="48dp"
+        android:layout_height="48dp"
+        android:layout_alignParentEnd="true"
+        android:layout_alignParentRight="true"
+        android:layout_centerVertical="true"
+        android:layout_marginStart="4dp"
+        android:layout_marginLeft="4dp"
+        android:layout_marginEnd="4dp"
+        android:layout_marginRight="4dp"
+        android:background="?selectableItemBackgroundBorderless"
+        android:contentDescription="@string/mobile_devices_unregister"
+        app:srcCompat="@drawable/ic_message_delete_24dp"
+        app:tint="?android:textColorSecondary" />
+</RelativeLayout>

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

@@ -204,6 +204,17 @@
     <string name="lucky_number_notify_new_item">Dziś szczęśliwym numerkiem jest: %d</string>
 
 
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Dostęp mobilny</string>
+    <string name="mobile_devices_no_items">Brak urządzeń</string>
+    <string name="mobile_devices_unregister">Wyrejestruj</string>
+    <string name="mobile_device_removed">Urządzenie usunięte</string>
+    <string name="mobile_device_qr">Kod QR</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+
+
     <!--Account-->
     <string name="account_add_new">Dodaj konto</string>
     <string name="account_logout">Wyloguj</string>
@@ -279,6 +290,7 @@
 
     <!--Others-->
     <string name="all_copied">Skopiowano</string>
+    <string name="all_undo">Cofnij</string>
 
 
     <!--Errors-->

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

@@ -188,6 +188,16 @@
     <string name="lucky_number_notify_new_item_title">Lucky number for today</string>
     <string name="lucky_number_notify_new_item">Today\'s lucky number is: %d</string>
 
+    <!--Mobile devices-->
+    <string name="mobile_devices_title">Mobile devices</string>
+    <string name="mobile_devices_no_items">No devices</string>
+    <string name="mobile_devices_unregister">Unregister</string>
+    <string name="mobile_device_removed">Device removed</string>
+    <string name="mobile_device_qr">QR code</string>
+    <string name="mobile_device_token">Token</string>
+    <string name="mobile_device_symbol">Symbol</string>
+    <string name="mobile_device_pin">PIN</string>
+
 
     <!--Account-->
     <string name="account_add_new">Add account</string>
@@ -264,6 +274,7 @@
 
     <!--Others-->
     <string name="all_copied">Copied</string>
+    <string name="all_undo">Undo</string>
 
 
     <!--Errors-->

app/src/test/java/io/github/wulkanowy/data/repositories/mobiledevice/MobileDeviceRepositoryTest.kt

@@ -0,0 +1,64 @@
+package io.github.wulkanowy.data.repositories.mobiledevice
+
+import com.github.pwittchen.reactivenetwork.library.rx2.internet.observing.InternetObservingSettings
+import io.github.wulkanowy.data.db.entities.MobileDevice
+import io.github.wulkanowy.data.db.entities.Semester
+import io.github.wulkanowy.data.repositories.UnitTestInternetObservingStrategy
+import io.reactivex.Maybe
+import io.reactivex.Single
+import org.junit.Before
+import org.junit.Test
+import org.mockito.Mock
+import org.mockito.Mockito.doReturn
+import org.mockito.Mockito.verify
+import org.mockito.MockitoAnnotations
+import org.threeten.bp.LocalDateTime.of
+
+class MobileDeviceRepositoryTest {
+
+    @Mock
+    private lateinit var semester: Semester
+
+    @Mock
+    private lateinit var mobileDeviceRemote: MobileDeviceRemote
+
+    @Mock
+    private lateinit var mobileDeviceLocal: MobileDeviceLocal
+
+    private lateinit var mobileDeviceRepository: MobileDeviceRepository
+
+    private val settings = InternetObservingSettings.builder()
+        .strategy(UnitTestInternetObservingStrategy())
+        .build()
+
+    @Before
+    fun initTest() {
+        MockitoAnnotations.initMocks(this)
+        mobileDeviceRepository = MobileDeviceRepository(settings, mobileDeviceLocal, mobileDeviceRemote)
+    }
+
+    @Test
+    fun getDevices() {
+        val devices = listOf(
+            getDeviceEntity(1),
+            getDeviceEntity(2)
+        )
+
+        doReturn(Maybe.empty<MobileDevice>()).`when`(mobileDeviceLocal).getDevices(semester)
+        doReturn(Single.just(devices)).`when`(mobileDeviceRemote).getDevices(semester)
+
+        mobileDeviceRepository.getDevices(semester).blockingGet()
+
+        verify(mobileDeviceLocal).deleteDevices(emptyList())
+        verify(mobileDeviceLocal).saveDevices(devices)
+    }
+
+    private fun getDeviceEntity(day: Int): MobileDevice {
+        return MobileDevice(
+            studentId = 1,
+            deviceId = 1,
+            name = "",
+            date = of(2019, 5, day, 0, 0, 0)
+        )
+    }
+}