Persist account capabilities

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

@@ -65,7 +65,7 @@ import static eu.faircode.email.ServiceAuthenticator.AUTH_TYPE_PASSWORD;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 198,
+        version = 199,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -2028,6 +2028,13 @@ public abstract class DB extends RoomDatabase {
                         db.execSQL("ALTER TABLE `message` ADD COLUMN `show_full` INTEGER NOT NULL DEFAULT 0");
                     }
                 }).addMigrations(new Migration(198, 199) {
+                    @Override
+                    public void migrate(@NonNull SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("ALTER TABLE `account` ADD COLUMN `capability_idle` INTEGER");
+                        db.execSQL("ALTER TABLE `account` ADD COLUMN `capability_utf8` INTEGER");
+                    }
+                }).addMigrations(new Migration(199, 200) {
                     @Override
                     public void migrate(@NonNull SupportSQLiteDatabase db) {
                         Log.i("DB migration from version " + startVersion + " to " + endVersion);

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

@@ -184,6 +184,12 @@ public interface DaoAccount {
     @Query("UPDATE account SET max_size = :max_size WHERE id = :id AND NOT (max_size IS :max_size)")
     int setAccountMaxSize(long id, Long max_size);
 
+    @Query("UPDATE account" +
+            " SET capability_idle = :idle, capability_utf8 = :utf8" +
+            " WHERE id = :id" +
+            " AND NOT (capability_idle IS :idle AND capability_utf8 IS :utf8)")
+    int setAccountCapabilities(long id, Boolean idle, Boolean utf8);
+
     @Query("UPDATE account SET warning = :warning WHERE id = :id AND NOT (warning IS :warning)")
     int setAccountWarning(long id, String warning);
 

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

@@ -146,6 +146,8 @@ public class EntityAccount extends EntityOrder implements Serializable {
     public Long last_connected;
     public Long backoff_until;
     public Long max_size;
+    public Boolean capability_idle;
+    public Boolean capability_utf8;
 
     boolean isGmail() {
         return "imap.gmail.com".equalsIgnoreCase(host);

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

@@ -695,7 +695,9 @@ public class FragmentAccount extends FragmentBase {
                             certificate, fingerprint);
 
                     result.idle = iservice.hasCapability("IDLE");
-                    result.utf8 = iservice.hasCapability("UTF8=ACCEPT");
+                    result.utf8 =
+                            iservice.hasCapability("UTF8=ACCEPT") ||
+                                    iservice.hasCapability("UTF8=ONLY");
 
                     for (Folder ifolder : iservice.getStore().getDefaultFolder().list("*")) {
                         // Check folder attributes

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

@@ -1282,6 +1282,9 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
 
                     // https://tools.ietf.org/html/rfc2177
                     final boolean capIdle = iservice.hasCapability("IDLE");
+                    final boolean capUtf8 =
+                            iservice.hasCapability("UTF8=ACCEPT") ||
+                                    iservice.hasCapability("UTF8=ONLY");
                     Log.i(account.name + " idle=" + capIdle);
                     if (!capIdle || account.poll_interval < OPTIMIZE_KEEP_ALIVE_INTERVAL)
                         optimizeAccount(account, "IDLE");
@@ -1289,6 +1292,7 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                     final boolean capNotify = iservice.hasCapability("NOTIFY");
 
                     db.account().setAccountState(account.id, "connected");
+                    db.account().setAccountCapabilities(account.id, capIdle, capUtf8);
                     db.account().setAccountError(account.id, null);
                     db.account().setAccountWarning(account.id, null);