Create `AccountExpiryNotification` class

3 files changed, 90 insertions, 0 deletions

diff --git a/android/src/main/kotlin/net/mullvad/mullvadvpn/service/notifications/AccountExpiryNotification.kt b/android/src/main/kotlin/net/mullvad/mullvadvpn/service/notifications/AccountExpiryNotification.kt
new file mode 100644
index 0000000000..0a40afc763
--- /dev/null
+++ b/android/src/main/kotlin/net/mullvad/mullvadvpn/service/notifications/AccountExpiryNotification.kt
@@ -0,0 +1,76 @@
+package net.mullvad.mullvadvpn.service.notifications
+
+import android.app.Notification
+import android.app.NotificationManager
+import android.app.PendingIntent
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import kotlin.properties.Delegates.observable
+import net.mullvad.mullvadvpn.R
+import org.joda.time.DateTime
+import org.joda.time.Duration
+
+class AccountExpiryNotification(val context: Context) {
+    companion object {
+        val NOTIFICATION_ID: Int = 2
+    }
+
+    private val resources = context.resources
+
+    private val buyMoreTimeUrl = Uri.parse(resources.getString(R.string.account_url))
+
+    private val channel = NotificationChannel(
+        context,
+        "mullvad_account_time",
+        R.string.account_time_notification_channel_name,
+        R.string.account_time_notification_channel_description,
+        NotificationManager.IMPORTANCE_HIGH
+    )
+
+    var accountExpiry by observable<DateTime?>(null) { _, oldValue, newValue ->
+        if (oldValue != newValue) {
+            if (newValue != null) {
+                channel.notificationManager.notify(NOTIFICATION_ID, build(newValue))
+            } else {
+                channel.notificationManager.cancel(NOTIFICATION_ID)
+            }
+        }
+    }
+
+    private fun build(expiry: DateTime): Notification {
+        val intent = Intent(Intent.ACTION_VIEW, buyMoreTimeUrl)
+        val flags = PendingIntent.FLAG_UPDATE_CURRENT
+        val pendingIntent = PendingIntent.getActivity(context, 1, intent, flags)
+
+        return channel.buildNotification(pendingIntent, format(expiry))
+    }
+
+    private fun format(expiry: DateTime): String {
+        val remainingTime = Duration(DateTime.now(), expiry)
+
+        if (remainingTime.isShorterThan(Duration.ZERO)) {
+            return resources.getString(R.string.account_credit_has_expired)
+        } else {
+            val remainingTimeInfo = remainingTime.toPeriodTo(expiry)
+
+            if (remainingTimeInfo.days >= 1) {
+                return getRemainingText(
+                    R.plurals.account_credit_expires_in_days,
+                    remainingTime.standardDays.toInt()
+                )
+            } else if (remainingTimeInfo.hours >= 1) {
+                return getRemainingText(
+                    R.plurals.account_credit_expires_in_hours,
+                    remainingTime.standardHours.toInt()
+                )
+            } else {
+                return resources.getString(R.string.account_credit_expires_in_a_few_minutes)
+            }
+        }
+    }
+
+    private fun getRemainingText(pluralId: Int, quantity: Int): String {
+        return resources.getQuantityString(pluralId, quantity, quantity)
+    }
+}
diff --git a/android/src/main/res/values/plurals.xml b/android/src/main/res/values/plurals.xml
index 679c4f46db..224cc9cb79 100644
--- a/android/src/main/res/values/plurals.xml
+++ b/android/src/main/res/values/plurals.xml
@@ -32,4 +32,12 @@
         <item quantity="one">a year ago</item>
         <item quantity="other">%d years ago</item>
     </plurals>
+    <plurals name="account_credit_expires_in_days">
+        <item quantity="one">Account credit expires in a day</item>
+        <item quantity="other">Account credit expires in %d days</item>
+    </plurals>
+    <plurals name="account_credit_expires_in_hours">
+        <item quantity="one">Account credit expires in an hour</item>
+        <item quantity="other">Account credit expires in %d hours</item>
+    </plurals>
 </resources>
diff --git a/android/src/main/res/values/strings.xml b/android/src/main/res/values/strings.xml
index 1bdf764ac4..48921c07a3 100644
--- a/android/src/main/res/values/strings.xml
+++ b/android/src/main/res/values/strings.xml
@@ -10,6 +10,9 @@
     <string name="foreground_notification_channel_name">VPN tunnel status</string>
     <string name="foreground_notification_channel_description">Shows current VPN tunnel
     status</string>
+    <string name="account_time_notification_channel_name">Account time reminders</string>
+    <string name="account_time_notification_channel_description">Shows reminders when the account
+    time is about to expire</string>
     <string name="connecting_to_daemon">Connecting to Mullvad system service...</string>
     <string name="login_title">Login</string>
     <string name="login_description">Enter your account number</string>
@@ -41,6 +44,9 @@
     <string name="settings_account">Account</string>
     <string name="less_than_a_day_left">less than a day left</string>
     <string name="less_than_a_minute_ago">less than a minute ago</string>
+    <string name="account_credit_expires_in_a_few_minutes">Account credit expires in a few
+    minutes</string>
+    <string name="account_credit_has_expired">Account credit has expired</string>
     <string name="out_of_time">Out of time</string>
     <string name="no_more_vpn_time_left">You have no more VPN time left on this account. Either buy
     credit on our website or redeem a voucher.</string>