Get, store and display append limit

app/src/main/java/com/sun/mail/imap/IMAPStore.java

@@ -1529,6 +1529,30 @@ public class IMAPStore extends Store
         }
     }
 
+    public synchronized String getCapability(String capability)
+            throws MessagingException {
+        IMAPProtocol p = null;
+        try {
+            p = getStoreProtocol();
+            Map<String, String> caps = p.getCapabilities();
+            if (caps != null)
+                for (String cap : caps.values()) {
+                    int eq = cap.indexOf('=');
+                    if (eq > 0) {
+                        String key = cap.substring(0, eq);
+                        String value = cap.substring(eq + 1);
+                        if (capability.equals(key))
+                            return value;
+                    }
+                }
+            return null;
+        } catch (ProtocolException pex) {
+            throw new MessagingException(pex.getMessage(), pex);
+        } finally {
+            releaseStoreProtocol(p);
+        }
+    }
+
     /**
      * Set the user name to be used with the PROXYAUTH command.
      * The PROXYAUTH user name can also be set using the

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

@@ -94,6 +94,7 @@ public class AdapterAccount extends RecyclerView.Adapter<AdapterAccount.ViewHold
         private TextView tvHost;
         private TextView tvLast;
         private TextView tvQuota;
+        private TextView tvMaxSize;
         private TextView tvIdentity;
         private TextView tvDrafts;
         private TextView tvWarning;
@@ -119,6 +120,7 @@ public class AdapterAccount extends RecyclerView.Adapter<AdapterAccount.ViewHold
             tvHost = itemView.findViewById(R.id.tvHost);
             tvLast = itemView.findViewById(R.id.tvLast);
             tvQuota = itemView.findViewById(R.id.tvQuota);
+            tvMaxSize = itemView.findViewById(R.id.tvMaxSize);
             tvIdentity = itemView.findViewById(R.id.tvIdentity);
             tvDrafts = itemView.findViewById(R.id.tvDrafts);
             tvWarning = itemView.findViewById(R.id.tvWarning);
@@ -196,6 +198,9 @@ public class AdapterAccount extends RecyclerView.Adapter<AdapterAccount.ViewHold
                     (account.quota_limit == null ? "-" : Helper.humanReadableByteCount(account.quota_limit))));
             tvQuota.setVisibility(account.quota_usage != null || account.quota_limit != null ? View.VISIBLE : View.GONE);
 
+            tvMaxSize.setText(account.max_size == null ? null : Helper.humanReadableByteCount(account.max_size));
+            tvMaxSize.setVisibility(account.max_size != null && BuildConfig.DEBUG ? View.VISIBLE : View.GONE);
+
             tvIdentity.setVisibility(account.identities > 0 || !settings ? View.GONE : View.VISIBLE);
             tvDrafts.setVisibility(account.drafts || !settings ? View.GONE : View.VISIBLE);
 

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 = 169,
+        version = 170,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -1663,6 +1663,13 @@ public abstract class DB extends RoomDatabase {
                         Log.i("DB migration from version " + startVersion + " to " + endVersion);
                         db.execSQL("ALTER TABLE `identity` ADD COLUMN `max_size` INTEGER");
                     }
+                })
+                .addMigrations(new Migration(169, 170) {
+                    @Override
+                    public void migrate(@NonNull SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        db.execSQL("ALTER TABLE `account` ADD COLUMN `max_size` INTEGER");
+                    }
                 });
     }
 

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

@@ -163,6 +163,9 @@ public interface DaoAccount {
     @Query("UPDATE account SET partial_fetch = :partial_fetch WHERE id = :id")
     int setAccountPartialFetch(long id, boolean partial_fetch);
 
+    @Query("UPDATE account SET max_size = :max_size WHERE id = :id")
+    int setAccountMaxSize(long id, Long max_size);
+
     @Query("UPDATE account SET warning = :warning WHERE id = :id")
     int setAccountWarning(long id, String warning);
 

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

@@ -634,9 +634,17 @@ public class EmailService implements AutoCloseable {
         return (SMTPTransport) iservice;
     }
 
-    Long getMaxSize() {
-        // https://tools.ietf.org/html/rfc1870
-        String size = getTransport().getExtensionParameter("SIZE");
+    Long getMaxSize() throws MessagingException {
+        String size;
+        if (iservice instanceof SMTPTransport) {
+            // https://tools.ietf.org/html/rfc1870
+            size = getTransport().getExtensionParameter("SIZE");
+        } else if (iservice instanceof IMAPStore) {
+            // https://tools.ietf.org/html/rfc7889
+            size = ((IMAPStore) iservice).getCapability("APPENDLIMIT");
+        } else
+            return null;
+
         if (!TextUtils.isEmpty(size) && TextUtils.isDigitsOnly(size)) {
             long s = Long.parseLong(size);
             if (s != 0) // Not infinite
@@ -644,7 +652,6 @@ public class EmailService implements AutoCloseable {
         }
 
         return null;
-
     }
 
     boolean hasCapability(String capability) throws MessagingException {

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

@@ -139,6 +139,7 @@ public class EntityAccount extends EntityOrder implements Serializable {
     public String warning;
     public String error;
     public Long last_connected;
+    public Long max_size;
 
     boolean isGmail() {
         return "imap.gmail.com".equalsIgnoreCase(host);
@@ -354,7 +355,8 @@ public class EntityAccount extends EntityOrder implements Serializable {
                     Objects.equals(this.state, other.state) &&
                     Objects.equals(this.warning, other.warning) &&
                     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/ServiceSynchronize.java

@@ -984,6 +984,8 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                     db.account().setAccountWarning(account.id, null);
                     EntityLog.log(this, account.name + " connected");
 
+                    db.account().setAccountMaxSize(account.id, iservice.getMaxSize());
+
                     // Listen for folder events
                     iservice.getStore().addFolderListener(new FolderAdapter() {
                         @Override

app/src/main/res/layout/item_account.xml

@@ -168,10 +168,23 @@
                 android:singleLine="true"
                 android:text="123/456 MB"
                 android:textAppearance="@style/TextAppearance.AppCompat.Small"
-                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintEnd_toStartOf="@+id/tvMaxSize"
                 app:layout_constraintStart_toEndOf="@+id/ivState"
                 app:layout_constraintTop_toBottomOf="@id/tvLast" />
 
+            <eu.faircode.email.FixedTextView
+                android:id="@+id/tvMaxSize"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_marginStart="6dp"
+                android:layout_marginEnd="6dp"
+                android:ellipsize="start"
+                android:singleLine="true"
+                android:text="25 MB"
+                android:textAppearance="@style/TextAppearance.AppCompat.Small"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintTop_toBottomOf="@id/tvLast" />
+
             <eu.faircode.email.FixedTextView
                 android:id="@+id/tvIdentity"
                 android:layout_width="0dp"