Fetch SMTP max message size

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

@@ -61,7 +61,7 @@ import io.requery.android.database.sqlite.SQLiteDatabase;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 168,
+        version = 169,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -1656,6 +1656,13 @@ public abstract class DB extends RoomDatabase {
                         Log.i("DB migration from version " + startVersion + " to " + endVersion);
                         db.execSQL("ALTER TABLE `identity` ADD COLUMN `self` INTEGER NOT NULL DEFAULT 1");
                     }
+                })
+                .addMigrations(new Migration(168, 169) {
+                    @Override
+                    public void migrate(@NonNull SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("ALTER TABLE `identity` ADD COLUMN `max_size` INTEGER");
+                    }
                 });
     }
 

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

@@ -112,6 +112,9 @@ public interface DaoIdentity {
     @Query("UPDATE identity SET sign_key_alias = :alias WHERE id = :id")
     int setIdentitySignKeyAlias(long id, String alias);
 
+    @Query("UPDATE identity SET max_size = :max_size WHERE id = :id")
+    int setIdentityMaxSize(long id, Integer max_size);
+
     @Query("UPDATE identity SET error = :error WHERE id = :id")
     int setIdentityError(long id, String error);
 

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

@@ -634,6 +634,17 @@ public class EmailService implements AutoCloseable {
         return (SMTPTransport) iservice;
     }
 
+    Integer getMaxSize() {
+        SMTPTransport transport = getTransport();
+
+        String size = transport.getExtensionParameter("SIZE");
+        if (!TextUtils.isEmpty(size) && TextUtils.isDigitsOnly(size))
+            return Integer.parseInt(size);
+
+        return null;
+
+    }
+
     boolean hasCapability(String capability) throws MessagingException {
         Store store = getStore();
         if (store instanceof IMAPStore)

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

@@ -116,6 +116,7 @@ public class EntityIdentity {
     public String state;
     public String error;
     public Long last_connected;
+    public Integer max_size;
 
     String getProtocol() {
         return (starttls ? "smtp" : "smtps");
@@ -294,7 +295,8 @@ public class EntityIdentity {
                     Objects.equals(this.sign_key_alias, other.sign_key_alias) &&
                     Objects.equals(this.state, other.state) &&
                     Objects.equals(this.error, other.error) &&
-                    Objects.equals(this.last_connected, other.last_connected));
+                    Objects.equals(this.last_connected, other.last_connected) &&
+                    Objects.equals(this.max_size, other.max_size));
         } else
             return false;
     }

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

@@ -1037,7 +1037,8 @@ public class FragmentAccount extends FragmentBase {
                         !account.password.equals(password) ||
                         !Objects.equals(account.certificate_alias, certificate) ||
                         !Objects.equals(realm, accountRealm) ||
-                        !Objects.equals(account.fingerprint, fingerprint)));
+                        !Objects.equals(account.fingerprint, fingerprint) ||
+                        BuildConfig.DEBUG));
                 Log.i("Account check=" + check);
 
                 Long last_connected = null;

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

@@ -817,7 +817,8 @@ public class FragmentIdentity extends FragmentBase {
                         !Objects.equals(realm, identityRealm) ||
                         !Objects.equals(fingerprint, identity.fingerprint) ||
                         use_ip != identity.use_ip ||
-                        !Objects.equals(ehlo, identity.ehlo)));
+                        !Objects.equals(ehlo, identity.ehlo) ||
+                        BuildConfig.DEBUG));
                 Log.i("Identity check=" + check);
 
                 Long last_connected = null;
@@ -825,6 +826,7 @@ public class FragmentIdentity extends FragmentBase {
                     last_connected = identity.last_connected;
 
                 // Check SMTP server
+                Integer max_size = null;
                 if (check) {
                     // Create transport
                     String protocol = (starttls ? "smtp" : "smtps");
@@ -836,6 +838,7 @@ public class FragmentIdentity extends FragmentBase {
                                 auth, provider,
                                 user, password,
                                 certificate, fingerprint);
+                        max_size = iservice.getMaxSize();
                     }
                 }
 
@@ -888,6 +891,8 @@ public class FragmentIdentity extends FragmentBase {
                     identity.sign_key_alias = null;
                     identity.error = null;
                     identity.last_connected = last_connected;
+                    if (max_size != null)
+                        identity.max_size = max_size;
 
                     if (identity.primary)
                         db.identity().resetPrimary(account);

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

@@ -555,6 +555,10 @@ public class ServiceSend extends ServiceBase {
                 throw new IOException("Test");
             db.identity().setIdentityState(ident.id, "connected");
 
+            Integer max_size = iservice.getMaxSize();
+            if (max_size != null)
+                db.identity().setIdentityMaxSize(ident.id, max_size);
+
             Address[] to = imessage.getAllRecipients();
             String via = "via " + ident.host + "/" + ident.user +
                     " to " + TextUtils.join(", ", to);