Added basic new email notification

app/src/main/java/eu/faircode/email/DaoAccount.java

@@ -49,8 +49,14 @@ public interface DaoAccount {
     LiveData<EntityAccount> liveFirstAccount();
 
     @Query("SELECT" +
-            " (SELECT COUNT(*) FROM account WHERE synchronize) AS accounts," +
-            " (SELECT COUNT(*) FROM operation JOIN message ON message.id = operation.message JOIN account ON account.id = message.account WHERE synchronize) AS operations")
+            " (SELECT COUNT(*) FROM account WHERE synchronize) AS accounts" +
+            ", (SELECT COUNT(*) FROM operation" +
+            "     JOIN message ON message.id = operation.message" +
+            "     JOIN account ON account.id = message.account" +
+            "     WHERE synchronize) AS operations" +
+            ", (SELECT COUNT(*) FROM message" +
+            "     JOIN folder ON folder.id = message.folder" +
+            "     WHERE NOT ui_seen AND folder.type = '" + EntityFolder.TYPE_INBOX + "') AS unseen")
     LiveData<TupleAccountStats> liveStats();
 
     @Insert(onConflict = OnConflictStrategy.REPLACE)

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -120,7 +120,7 @@ public class ServiceSynchronize extends LifecycleService {
     public void onCreate() {
         Log.i(Helper.TAG, "Service create");
         super.onCreate();
-        startForeground(NOTIFICATION_SYNCHRONIZE, getNotification(0, -1).build());
+        startForeground(NOTIFICATION_SYNCHRONIZE, getNotification(0, -1, 0).build());
 
         // Listen for network changes
         ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
@@ -134,7 +134,7 @@ public class ServiceSynchronize extends LifecycleService {
             public void onChanged(@Nullable TupleAccountStats stats) {
                 if (stats != null) {
                     NotificationManager nm = getSystemService(NotificationManager.class);
-                    nm.notify(NOTIFICATION_SYNCHRONIZE, getNotification(stats.accounts, stats.operations).build());
+                    nm.notify(NOTIFICATION_SYNCHRONIZE, getNotification(stats.accounts, stats.operations, stats.unseen).build());
                 }
             }
         });
@@ -165,7 +165,7 @@ public class ServiceSynchronize extends LifecycleService {
         return START_STICKY;
     }
 
-    private Notification.Builder getNotification(int acounts, int operations) {
+    private Notification.Builder getNotification(int accounts, int operations, int unseen) {
         // Build pending intent
         Intent intent = new Intent(this, ActivityView.class);
         intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
@@ -175,24 +175,22 @@ public class ServiceSynchronize extends LifecycleService {
         // Build notification
         Notification.Builder builder;
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-            builder = new Notification.Builder(this, "service");
+            builder = new Notification.Builder(this, unseen == 0 ? "service" : "notification");
         else
             builder = new Notification.Builder(this);
 
         builder
                 .setSmallIcon(R.drawable.baseline_mail_outline_24)
-                .setContentTitle(getString(R.string.title_synchronizing, acounts))
-                .setContentText(getString(R.string.title_operations, operations))
+                .setContentTitle(getString(R.string.title_notification_synchronizing, accounts))
+                .setContentText(getString(R.string.title_notification_unseen, unseen))
                 .setContentIntent(pi)
+                .setStyle(new Notification.BigTextStyle().setSummaryText(getString(R.string.title_operations, operations)))
                 .setAutoCancel(false)
-                .setShowWhen(false)
-                .setPriority(Notification.PRIORITY_MIN)
+                .setShowWhen(unseen > 0)
+                .setPriority(unseen == 0 ? Notification.PRIORITY_MIN : Notification.PRIORITY_DEFAULT)
                 .setCategory(Notification.CATEGORY_STATUS)
                 .setVisibility(Notification.VISIBILITY_SECRET);
 
-        if (operations >= 0)
-            builder.setContentText(getString(R.string.title_operations, operations));
-
         return builder;
     }
 
@@ -212,7 +210,7 @@ public class ServiceSynchronize extends LifecycleService {
 
         builder
                 .setSmallIcon(android.R.drawable.stat_notify_error)
-                .setContentTitle(getString(R.string.title_failed, action))
+                .setContentTitle(getString(R.string.title_notification_failed, action))
                 .setContentText(Helper.formatThrowable(ex))
                 .setContentIntent(pi)
                 .setAutoCancel(false)
@@ -1148,6 +1146,12 @@ public class ServiceSynchronize extends LifecycleService {
             service.setSound(null, Notification.AUDIO_ATTRIBUTES_DEFAULT);
             nm.createNotificationChannel(service);
 
+            NotificationChannel notification = new NotificationChannel(
+                    "notification",
+                    context.getString(R.string.channel_notification),
+                    NotificationManager.IMPORTANCE_DEFAULT);
+            nm.createNotificationChannel(notification);
+
             NotificationChannel error = new NotificationChannel(
                     "error",
                     context.getString(R.string.channel_error),

app/src/main/java/eu/faircode/email/TupleAccountStats.java

@@ -22,4 +22,5 @@ package eu.faircode.email;
 public class TupleAccountStats {
     public Integer accounts;
     public Integer operations;
+    public Integer unseen;
 }

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

@@ -2,11 +2,13 @@
     <string name="app_name">Safe email</string>
 
     <string name="channel_service">Service</string>
+    <string name="channel_notification">Notifications</string>
     <string name="channel_error">Errors</string>
 
-    <string name="title_synchronizing">Synchronizing %1$d account(s)</string>
-    <string name="title_operations">%1$d operation(s) pending</string>
-    <string name="title_failed">\'%1$s\' failed</string>
+    <string name="title_notification_synchronizing">Synchronizing %1$d account(s)</string>
+    <string name="title_notification_operations">%1$d operation(s) pending</string>
+    <string name="title_notification_unseen">%1$d new message(s)</string>
+    <string name="title_notification_failed">\'%1$s\' failed</string>
 
     <string name="menu_folders">Folders</string>
     <string name="menu_setup">Setup</string>