Added new gtasks sync metadata for saving last sync time

api/src/com/todoroo/astrid/sync/SyncMetadataService.java

@@ -97,13 +97,22 @@ abstract public class SyncMetadataService<TYPE extends SyncContainer> {
         if(lastSyncDate == 0)
             tasks = taskDao.query(Query.select(Task.ID).where(Criterion.none));
         else
-            tasks = taskDao.query(Query.select(Task.ID).where(Criterion.and(
-                    Task.MODIFICATION_DATE.gt(lastSyncDate),
-                    Task.LAST_SYNC.lte(lastSyncDate))).orderBy(Order.asc(Task.ID)));
+            tasks = taskDao.query(Query.select(Task.ID).where(
+                    Task.MODIFICATION_DATE.gt(lastSyncDate)).orderBy(Order.asc(Task.ID)));
+        tasks = filterLocallyUpdated(tasks, lastSyncDate);
 
         return joinWithMetadata(tasks, true, properties);
     }
 
+    /**
+     * @param tasks
+     * @param lastSyncDate
+     */
+    protected TodorooCursor<Task> filterLocallyUpdated(TodorooCursor<Task> tasks, long lastSyncDate) {
+        // override hook
+        return tasks;
+    }
+
     private TodorooCursor<Task> joinWithMetadata(TodorooCursor<Task> tasks,
             boolean both, Property<?>... properties) {
         try {

astrid/plugin-src/com/todoroo/astrid/gtasks/GtasksMetadataService.java

@@ -4,6 +4,7 @@
 package com.todoroo.astrid.gtasks;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
@@ -74,6 +75,22 @@ public final class GtasksMetadataService extends SyncMetadataService<GtasksTaskC
         return GtasksMetadata.ID.neq(""); //$NON-NLS-1$
     }
 
+    @Override
+    protected TodorooCursor<Task> filterLocallyUpdated(TodorooCursor<Task> tasks, long lastSyncDate) {
+        HashSet<Long> taskIds = new HashSet<Long>();
+        for(tasks.moveToFirst(); !tasks.isAfterLast(); tasks.moveToNext())
+            taskIds.add(tasks.get(Task.ID));
+
+        TodorooCursor<Metadata> metadata = metadataDao.query(Query.select(Metadata.TASK).where(
+                Criterion.and(MetadataCriteria.withKey(GtasksSyncMetadata.METADATA_KEY),
+                GtasksSyncMetadata.LAST_SYNC.lt(lastSyncDate))));
+        for(metadata.moveToFirst(); !metadata.isAfterLast(); metadata.moveToNext())
+            taskIds.remove(metadata.get(Metadata.TASK));
+
+        return taskDao.query(Query.select(Task.ID).where(
+                Task.ID.in(taskIds.toArray(new Long[taskIds.size()]))));
+    }
+
     // --- list iterating helpers
 
 

astrid/plugin-src/com/todoroo/astrid/gtasks/GtasksSyncMetadata.java

@@ -0,0 +1,49 @@
+package com.todoroo.astrid.gtasks;
+
+import com.todoroo.andlib.data.Property;
+import com.todoroo.andlib.data.Property.LongProperty;
+import com.todoroo.andlib.data.TodorooCursor;
+import com.todoroo.andlib.sql.Query;
+import com.todoroo.astrid.dao.MetadataDao;
+import com.todoroo.astrid.dao.MetadataDao.MetadataCriteria;
+import com.todoroo.astrid.data.Metadata;
+
+/**
+ * Metadata entries for synchronizing a GTasks Task
+ * @author Tim Su <tim@todoroo.com>
+ *
+ */
+public class GtasksSyncMetadata {
+
+    /** metadata key */
+    public static final String METADATA_KEY = "gtasks-sync"; //$NON-NLS-1$
+
+    /** last sync date*/
+    public static final LongProperty LAST_SYNC = new LongProperty(Metadata.TABLE,
+            Metadata.VALUE1.name);
+
+    /**
+     * Helper to set value
+     * @param metadataDao
+     * @param id
+     * @param property
+     * @param now
+     */
+    public static <T> void set(MetadataDao metadataDao, long taskId,
+            Property<T> property, T value) {
+        TodorooCursor<Metadata> cursor = metadataDao.query(Query.select(Metadata.PROPERTIES).
+                where(MetadataCriteria.byTaskAndwithKey(taskId, METADATA_KEY)));
+        Metadata metadata = new Metadata();
+        if(cursor.getCount() == 0) {
+            metadata.setValue(Metadata.TASK, taskId);
+            metadata.setValue(Metadata.KEY, METADATA_KEY);
+        } else {
+            cursor.moveToFirst();
+            metadata.readFromCursor(cursor);
+        }
+
+        metadata.setValue(property, value);
+        metadataDao.persist(metadata);
+    }
+
+}

astrid/plugin-src/com/todoroo/astrid/gtasks/sync/GtasksSyncOnSaveService.java

@@ -21,6 +21,7 @@ import com.todoroo.astrid.data.Task;
 import com.todoroo.astrid.gtasks.GtasksMetadata;
 import com.todoroo.astrid.gtasks.GtasksMetadataService;
 import com.todoroo.astrid.gtasks.GtasksPreferenceService;
+import com.todoroo.astrid.gtasks.GtasksSyncMetadata;
 import com.todoroo.astrid.gtasks.GtasksTaskListUpdater;
 import com.todoroo.astrid.gtasks.api.GtasksApiUtilities;
 import com.todoroo.astrid.gtasks.api.GtasksService;
@@ -253,7 +254,7 @@ public final class GtasksSyncOnSaveService {
         }
 
         task.setValue(Task.MODIFICATION_DATE, DateUtilities.now());
-        task.setValue(Task.LAST_SYNC, DateUtilities.now());
+        GtasksSyncMetadata.set(metadataDao, task.getId(), GtasksSyncMetadata.LAST_SYNC, DateUtilities.now());
         Flags.set(Flags.GTASKS_SUPPRESS_SYNC);
         taskDao.saveExisting(task);
     }