Auto download attachments < 32 KB

Fixes #81

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

@@ -169,6 +169,8 @@ public class BoundaryCallbackMessages extends PagedList.BoundaryCallback<TupleMe
                         index--;
                     }
 
+                    EntityOperation.process(context); // download small attachments
+
                     Log.i(Helper.TAG, "Boundary done");
                 } catch (final Throwable ex) {
                     Log.e(Helper.TAG, "Boundary " + ex + "\n" + Log.getStackTraceString(ex));

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

@@ -124,6 +124,7 @@ public class ServiceSynchronize extends LifecycleService {
     private static final int CONNECT_BACKOFF_START = 32; // seconds
     private static final int CONNECT_BACKOFF_MAX = 1024; // seconds (1024 sec ~ 17 min)
     private static final long STORE_NOOP_INTERVAL = 9 * 60 * 1000L; // ms
+    private static final int ATTACHMENT_AUTO_DOWNLOAD_SIZE = 32 * 1024; // bytes
 
     static final String ACTION_SYNCHRONIZE_FOLDER = BuildConfig.APPLICATION_ID + ".SYNCHRONIZE_FOLDER";
     static final String ACTION_PROCESS_OPERATIONS = BuildConfig.APPLICATION_ID + ".PROCESS_OPERATIONS";
@@ -519,6 +520,7 @@ public class ServiceSynchronize extends LifecycleService {
                                                     } catch (MessageRemovedException ex) {
                                                         Log.w(Helper.TAG, folder.name + " " + ex + "\n" + Log.getStackTraceString(ex));
                                                     }
+                                                EntityOperation.process(ServiceSynchronize.this); // download small attachments
                                             } catch (Throwable ex) {
                                                 Log.e(Helper.TAG, folder.name + " " + ex + "\n" + Log.getStackTraceString(ex));
                                                 reportError(account.name, folder.name, ex);
@@ -576,6 +578,7 @@ public class ServiceSynchronize extends LifecycleService {
                                                 try {
                                                     Log.i(Helper.TAG, folder.name + " message changed");
                                                     synchronizeMessage(ServiceSynchronize.this, folder, ifolder, (IMAPMessage) e.getMessage(), false);
+                                                    EntityOperation.process(ServiceSynchronize.this); // download small attachments
                                                 } catch (MessageRemovedException ex) {
                                                     Log.w(Helper.TAG, folder.name + " " + ex + "\n" + Log.getStackTraceString(ex));
                                                 }
@@ -1265,6 +1268,7 @@ public class ServiceSynchronize extends LifecycleService {
                 } catch (MessageRemovedException ex) {
                     Log.w(Helper.TAG, folder.name + " " + ex + "\n" + Log.getStackTraceString(ex));
                 }
+            EntityOperation.process(this); // download small attachments
 
             Log.w(Helper.TAG, folder.name + " statistics added=" + added + " updated=" + updated + " unchanged=" + unchanged);
         } finally {
@@ -1393,6 +1397,9 @@ public class ServiceSynchronize extends LifecycleService {
                         attachment.message = message.id;
                         attachment.sequence = sequence;
                         attachment.id = db.attachment().insertAttachment(attachment);
+
+                        if (attachment.size != null && attachment.size < ATTACHMENT_AUTO_DOWNLOAD_SIZE)
+                            EntityOperation.queue(db, message, EntityOperation.ATTACHMENT, sequence);
                     }
 
                     result = 1;