Use AlarmManager for notifications

Instead of scheduling system notifications from a flow we now
schedule them independently from the app lifecycle via AlarmManager.

This is done so that for example an expiry notification that the user
dismissed won't get redisplayed if the app process gets killed and
then restarted.

When the account exiry time is fetched we schedule an alarm that will
show a notification 3 days before the account time expires. This alarm
then also schedules a new alarm to show the following notification and
so on.

To make this work this PR also introduces two new broadcast receivers;
one on boot received listener and one on time time/timezone changed
listener.

Beause Android clears alarms when the devices is rebooted/the time is
changed we need these listeners to re-trigger the alarm.

To enable the broadcast receivers to re-trigger the alarm we also have
to persist the expiry time in the DataStore preferences.

6 files changed, 31 insertions, 240 deletions

diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/AccountExpiryNotificationProviderTest.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/AccountExpiryNotificationProviderTest.kt
deleted file mode 100644
index 9a3672515d..0000000000
--- a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/AccountExpiryNotificationProviderTest.kt
+++ /dev/null
@@ -1,213 +0,0 @@
-package net.mullvad.mullvadvpn
-
-import app.cash.turbine.test
-import io.mockk.MockKAnnotations
-import io.mockk.every
-import io.mockk.mockk
-import io.mockk.unmockkAll
-import java.time.Duration
-import java.time.ZonedDateTime
-import kotlin.test.assertEquals
-import kotlin.test.assertTrue
-import kotlin.time.Duration.Companion.minutes
-import kotlin.time.Duration.Companion.seconds
-import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.flow.MutableStateFlow
-import kotlinx.coroutines.test.advanceTimeBy
-import kotlinx.coroutines.test.runTest
-import net.mullvad.mullvadvpn.lib.common.test.TestCoroutineRule
-import net.mullvad.mullvadvpn.lib.model.AccountData
-import net.mullvad.mullvadvpn.lib.model.DeviceState
-import net.mullvad.mullvadvpn.lib.model.Notification
-import net.mullvad.mullvadvpn.lib.model.NotificationChannelId
-import net.mullvad.mullvadvpn.lib.model.NotificationUpdate
-import net.mullvad.mullvadvpn.lib.model.NotificationUpdate.Cancel
-import net.mullvad.mullvadvpn.lib.model.NotificationUpdate.Notify
-import net.mullvad.mullvadvpn.lib.shared.AccountRepository
-import net.mullvad.mullvadvpn.lib.shared.DeviceRepository
-import net.mullvad.mullvadvpn.service.notifications.accountexpiry.ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD
-import net.mullvad.mullvadvpn.service.notifications.accountexpiry.AccountExpiryNotificationProvider
-import org.junit.jupiter.api.AfterEach
-import org.junit.jupiter.api.BeforeEach
-import org.junit.jupiter.api.Test
-import org.junit.jupiter.api.extension.ExtendWith
-
-@ExperimentalCoroutinesApi
-@ExtendWith(TestCoroutineRule::class)
-class AccountExpiryNotificationProviderTest {
-
-    private lateinit var provider: AccountExpiryNotificationProvider
-
-    private val accountData = MutableStateFlow<AccountData?>(null)
-    private val deviceState = MutableStateFlow<DeviceState?>(null)
-    private val isNewDevice = MutableStateFlow(true)
-
-    @BeforeEach
-    fun setup() {
-        MockKAnnotations.init(this)
-
-        val accountRepository = mockk<AccountRepository>(relaxed = true)
-        every { accountRepository.accountData } returns accountData
-        every { accountRepository.isNewAccount } returns isNewDevice
-
-        val deviceRepository = mockk<DeviceRepository>(relaxed = true)
-        every { deviceRepository.deviceState } returns deviceState
-
-        provider =
-            AccountExpiryNotificationProvider(
-                channelId = NotificationChannelId("channelId"),
-                accountRepository = accountRepository,
-                deviceRepository = deviceRepository,
-            )
-
-        deviceState.value = DeviceState.LoggedIn(mockk(relaxed = true), mockk(relaxed = true))
-        isNewDevice.value = false
-    }
-
-    @AfterEach
-    fun teardown() {
-        unmockkAll()
-    }
-
-    @Test
-    fun `should not emit notification in initial state`() = runTest {
-        accountData.value = null
-        deviceState.value = null
-        isNewDevice.value = true
-        provider.notifications.test { expectNoEvents() }
-    }
-
-    @Test
-    fun `should emit notification if expiry time is shorter than expiry warning threshold`() =
-        runTest {
-            setExpiry(
-                ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusDays(1)
-            )
-            provider.notifications.test {
-                assertTrue(awaitItem() is Notify)
-                expectNoEvents()
-            }
-        }
-
-    @Test
-    fun `should emit cancel notification if user account is new`() = runTest {
-        isNewDevice.value = true
-        setExpiry(ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusDays(1))
-        provider.notifications.test {
-            assertTrue(awaitItem() is Cancel)
-            expectNoEvents()
-        }
-    }
-
-    @Test
-    fun `should emit cancel notification if user account is logged out`() = runTest {
-        setIsLoggedIn(false)
-        setExpiry(ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusDays(1))
-        provider.notifications.test {
-            assertTrue(awaitItem() is Cancel)
-            expectNoEvents()
-
-            setIsLoggedIn(true)
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-
-            setIsLoggedIn(false)
-            assertTrue(awaitItem() is Cancel)
-            expectNoEvents()
-        }
-    }
-
-    @Test
-    fun `should emit zero duration notification when remaining time runs out`() = runTest {
-        setExpiry(ZonedDateTime.now().plus(Duration.ofSeconds(60)))
-        provider.notifications.test {
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-
-            advanceTimeBy(59.seconds)
-            expectNoEvents()
-
-            advanceTimeBy(2.seconds)
-            val item = getAccountExpiry(awaitItem())
-            assertEquals(item.durationUntilExpiry, Duration.ZERO)
-            expectNoEvents()
-        }
-    }
-
-    @Test
-    fun `should emit notification when update interval is passed`() = runTest {
-        setExpiry(
-            ZonedDateTime.now()
-                .plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD)
-                .minusDays(1)
-                .plusHours(1)
-        )
-        provider.notifications.test {
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-
-            advanceTimeBy(59.minutes)
-            expectNoEvents()
-
-            advanceTimeBy(1.minutes + 1.seconds)
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-        }
-    }
-
-    @Test
-    fun `should cancel existing notification if more time is added to account`() = runTest {
-        setExpiry(ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusDays(1))
-        provider.notifications.test {
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-
-            setExpiry(
-                ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).plusDays(1)
-            )
-            assertTrue(awaitItem() is Cancel)
-            expectNoEvents()
-        }
-    }
-
-    @Test
-    fun `should not cancel existing notification if too little time is added`() = runTest {
-        setExpiry(ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusDays(1))
-        provider.notifications.test {
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-
-            setExpiry(
-                ZonedDateTime.now().plus(ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD).minusHours(1)
-            )
-            assertTrue(awaitItem() is Notify)
-            expectNoEvents()
-        }
-    }
-
-    private fun getAccountExpiry(
-        awaitItem: NotificationUpdate<Notification.AccountExpiry>
-    ): Notification.AccountExpiry =
-        when (awaitItem) {
-            is Cancel -> error("expected AccountExpiry, was Cancel")
-            is Notify -> awaitItem.value
-        }
-
-    private fun setExpiry(expiryDateTime: ZonedDateTime): ZonedDateTime {
-        val expiry = AccountData(mockk(relaxed = true), expiryDateTime)
-        accountData.value = expiry
-        return expiryDateTime
-    }
-
-    private fun setIsLoggedIn(isLoggedIn: Boolean) {
-        deviceState.value =
-            if (isLoggedIn) {
-                DeviceState.LoggedIn(
-                    accountNumber = mockk(relaxed = true),
-                    device = mockk(relaxed = true),
-                )
-            } else {
-                DeviceState.LoggedOut
-            }
-    }
-}
diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/data/Extensions.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/data/Extensions.kt
new file mode 100644
index 0000000000..eb7a98ed8b
--- /dev/null
+++ b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/data/Extensions.kt
@@ -0,0 +1,12 @@
+package net.mullvad.mullvadvpn.data
+
+import io.mockk.mockk
+import java.time.ZonedDateTime
+import net.mullvad.mullvadvpn.lib.model.AccountData
+
+fun AccountData.Companion.mock(expiry: ZonedDateTime): AccountData =
+    AccountData(
+        id = mockk(relaxed = true),
+        accountNumber = mockk(relaxed = true),
+        expiryDate = expiry,
+    )
diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/AccountExpiryInAppNotificationUseCaseTest.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/AccountExpiryInAppNotificationUseCaseTest.kt
index df7d561f84..0557cc5786 100644
--- a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/AccountExpiryInAppNotificationUseCaseTest.kt
+++ b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/AccountExpiryInAppNotificationUseCaseTest.kt
@@ -15,12 +15,13 @@ import kotlin.time.Duration.Companion.seconds
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.test.advanceTimeBy
 import kotlinx.coroutines.test.runTest
+import net.mullvad.mullvadvpn.data.mock
 import net.mullvad.mullvadvpn.lib.common.test.TestCoroutineRule
 import net.mullvad.mullvadvpn.lib.model.AccountData
 import net.mullvad.mullvadvpn.lib.model.InAppNotification
 import net.mullvad.mullvadvpn.lib.shared.AccountRepository
 import net.mullvad.mullvadvpn.service.notifications.accountexpiry.ACCOUNT_EXPIRY_CLOSE_TO_EXPIRY_THRESHOLD
-import net.mullvad.mullvadvpn.service.notifications.accountexpiry.ACCOUNT_EXPIRY_IN_APP_NOTIFICATION_UPDATE_INTERVAL
+import net.mullvad.mullvadvpn.service.notifications.accountexpiry.ACCOUNT_EXPIRY_NOTIFICATION_UPDATE_INTERVAL
 import org.junit.jupiter.api.AfterEach
 import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
@@ -103,7 +104,7 @@ class AccountExpiryInAppNotificationUseCaseTest {
             // Set expiry to to be in the final update interval.
             val inLastUpdate =
                 ZonedDateTime.now()
-                    .plus(ACCOUNT_EXPIRY_IN_APP_NOTIFICATION_UPDATE_INTERVAL)
+                    .plus(ACCOUNT_EXPIRY_NOTIFICATION_UPDATE_INTERVAL)
                     .minusSeconds(1)
             val expiry = setExpiry(inLastUpdate)
 
@@ -113,9 +114,9 @@ class AccountExpiryInAppNotificationUseCaseTest {
             expectNoEvents()
 
             // Advance past the delay before the while loop:
-            advanceTimeBy(ACCOUNT_EXPIRY_IN_APP_NOTIFICATION_UPDATE_INTERVAL.toMillis())
+            advanceTimeBy(ACCOUNT_EXPIRY_NOTIFICATION_UPDATE_INTERVAL.toMillis())
             // Advance past the delay after the while loop:
-            advanceTimeBy(ACCOUNT_EXPIRY_IN_APP_NOTIFICATION_UPDATE_INTERVAL.toMillis())
+            advanceTimeBy(ACCOUNT_EXPIRY_NOTIFICATION_UPDATE_INTERVAL.toMillis())
             assertEquals(Duration.ZERO, getExpiryNotificationDuration(expectMostRecentItem()))
             expectNoEvents()
 
@@ -128,7 +129,7 @@ class AccountExpiryInAppNotificationUseCaseTest {
     }
 
     private fun setExpiry(expiryDateTime: ZonedDateTime): ZonedDateTime {
-        val expiry = AccountData(mockk(relaxed = true), expiryDateTime)
+        val expiry = AccountData.mock(expiryDateTime)
         accountExpiry.value = expiry
         return expiryDateTime
     }
diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/OutOfTimeUseCaseTest.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/OutOfTimeUseCaseTest.kt
index 4fd3ba08d1..0fd1563169 100644
--- a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/OutOfTimeUseCaseTest.kt
+++ b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/usecase/OutOfTimeUseCaseTest.kt
@@ -20,6 +20,7 @@ import kotlinx.coroutines.test.advanceTimeBy
 import kotlinx.coroutines.test.resetMain
 import kotlinx.coroutines.test.runTest
 import kotlinx.coroutines.test.setMain
+import net.mullvad.mullvadvpn.data.mock
 import net.mullvad.mullvadvpn.lib.model.AccountData
 import net.mullvad.mullvadvpn.lib.model.AuthFailedError
 import net.mullvad.mullvadvpn.lib.model.ErrorState
@@ -90,8 +91,7 @@ class OutOfTimeUseCaseTest {
     fun `tunnel is connected should emit false`() =
         scope.runTest {
             // Arrange
-            val expiredAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().plusDays(1))
+            val expiredAccountExpiry = AccountData.mock(ZonedDateTime.now().plusDays(1))
             val tunnelStateChanges =
                 listOf(
                     TunnelState.Disconnected(),
@@ -119,8 +119,7 @@ class OutOfTimeUseCaseTest {
     fun `account expiry that has expired should emit true`() =
         scope.runTest {
             // Arrange
-            val expiredAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().minusDays(1))
+            val expiredAccountExpiry = AccountData.mock(ZonedDateTime.now().minusDays(1))
             // Act, Assert
             outOfTimeUseCase.isOutOfTime.test {
                 assertEquals(null, awaitItem())
@@ -133,8 +132,7 @@ class OutOfTimeUseCaseTest {
     fun `account expiry that has not expired should emit false`() =
         scope.runTest {
             // Arrange
-            val notExpiredAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().plusDays(1))
+            val notExpiredAccountExpiry = AccountData.mock(ZonedDateTime.now().plusDays(1))
 
             // Act, Assert
             outOfTimeUseCase.isOutOfTime.test {
@@ -148,8 +146,7 @@ class OutOfTimeUseCaseTest {
     fun `account that expires without new expiry event should emit true`() =
         scope.runTest {
             // Arrange
-            val expiredAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().plusSeconds(100))
+            val expiredAccountExpiry = AccountData.mock(ZonedDateTime.now().plusSeconds(100))
             // Act, Assert
             outOfTimeUseCase.isOutOfTime.test {
                 // Initial event
@@ -172,10 +169,8 @@ class OutOfTimeUseCaseTest {
     fun `account that is about to expire but is refilled should emit false`() =
         scope.runTest {
             // Arrange
-            val initialAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().plusSeconds(100))
-            val updatedExpiry =
-                AccountData(mockk(relaxed = true), initialAccountExpiry.expiryDate.plusDays(30))
+            val initialAccountExpiry = AccountData.mock(ZonedDateTime.now().plusSeconds(100))
+            val updatedExpiry = AccountData.mock(initialAccountExpiry.expiryDate.plusDays(30))
 
             // Act, Assert
             outOfTimeUseCase.isOutOfTime.test {
@@ -202,10 +197,8 @@ class OutOfTimeUseCaseTest {
     fun `expired account that is refilled should emit false`() =
         scope.runTest {
             // Arrange
-            val initialAccountExpiry =
-                AccountData(mockk(relaxed = true), ZonedDateTime.now().plusSeconds(100))
-            val updatedExpiry =
-                AccountData(mockk(relaxed = true), initialAccountExpiry.expiryDate.plusDays(30))
+            val initialAccountExpiry = AccountData.mock(ZonedDateTime.now().plusSeconds(100))
+            val updatedExpiry = AccountData.mock(initialAccountExpiry.expiryDate.plusDays(30))
             // Act, Assert
             outOfTimeUseCase.isOutOfTime.test {
                 // Initial event
diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModelTest.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModelTest.kt
index a2be07e0a6..eeb848dc14 100644
--- a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModelTest.kt
+++ b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/LoginViewModelTest.kt
@@ -24,6 +24,7 @@ import net.mullvad.mullvadvpn.compose.state.LoginState.Idle
 import net.mullvad.mullvadvpn.compose.state.LoginState.Loading
 import net.mullvad.mullvadvpn.compose.state.LoginState.Success
 import net.mullvad.mullvadvpn.compose.state.LoginUiState
+import net.mullvad.mullvadvpn.data.mock
 import net.mullvad.mullvadvpn.lib.common.test.TestCoroutineRule
 import net.mullvad.mullvadvpn.lib.model.AccountData
 import net.mullvad.mullvadvpn.lib.model.AccountNumber
@@ -133,9 +134,7 @@ class LoginViewModelTest {
             val sideEffects = loginViewModel.uiSideEffect.testIn(backgroundScope)
             coEvery { mockedAccountRepository.login(any()) } returns Unit.right()
             coEvery { mockedAccountRepository.accountData } returns
-                MutableStateFlow(
-                    AccountData(mockk(relaxed = true), ZonedDateTime.now().plusDays(3))
-                )
+                MutableStateFlow(AccountData.mock(ZonedDateTime.now().plusDays(3)))
 
             // Act, Assert
             uiStates.skipDefaultItem()
diff --git a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/WelcomeViewModelTest.kt b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/WelcomeViewModelTest.kt
index a96d59361a..f753a2e613 100644
--- a/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/WelcomeViewModelTest.kt
+++ b/android/app/src/test/kotlin/net/mullvad/mullvadvpn/viewmodel/WelcomeViewModelTest.kt
@@ -15,6 +15,7 @@ import kotlinx.coroutines.cancel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.test.runTest
 import net.mullvad.mullvadvpn.compose.state.WelcomeUiState
+import net.mullvad.mullvadvpn.data.mock
 import net.mullvad.mullvadvpn.lib.common.test.TestCoroutineRule
 import net.mullvad.mullvadvpn.lib.model.AccountData
 import net.mullvad.mullvadvpn.lib.model.AccountNumber
@@ -149,9 +150,7 @@ class WelcomeViewModelTest {
     @Test
     fun `when user has added time then uiSideEffect should emit OpenConnectScreen`() = runTest {
         // Arrange
-        accountExpiryStateFlow.emit(
-            AccountData(mockk(relaxed = true), ZonedDateTime.now().plusDays(1))
-        )
+        accountExpiryStateFlow.emit(AccountData.mock(ZonedDateTime.now().plusDays(1)))
 
         // Act, Assert
         viewModel.uiSideEffect.test {