remember expanded state

src/main/java/com/commafeed/backend/model/FeedCategory.java

@@ -30,6 +30,8 @@ public class FeedCategory extends AbstractModel {
 	@OneToMany(mappedBy = "category")
 	private Set<FeedSubscription> subscriptions;
 
+	private boolean collapsed;
+
 	public String getName() {
 		return name;
 	}
@@ -73,4 +75,12 @@ public class FeedCategory extends AbstractModel {
 		this.children = children;
 	}
 
+	public boolean isCollapsed() {
+		return collapsed;
+	}
+
+	public void setCollapsed(boolean collapsed) {
+		this.collapsed = collapsed;
+	}
+
 }

src/main/java/com/commafeed/frontend/model/Category.java

@@ -7,11 +7,12 @@ import com.google.common.collect.Lists;
 
 @SuppressWarnings("serial")
 public class Category implements Serializable {
-	
+
 	private String id;
 	private String name;
 	private List<Category> children = Lists.newArrayList();
 	private List<Subscription> feeds = Lists.newArrayList();
+	private boolean expanded;
 
 	public String getId() {
 		return id;
@@ -45,4 +46,11 @@ public class Category implements Serializable {
 		this.feeds = feeds;
 	}
 
+	public boolean isExpanded() {
+		return expanded;
+	}
+
+	public void setExpanded(boolean expanded) {
+		this.expanded = expanded;
+	}
 }

src/main/java/com/commafeed/frontend/rest/resources/SubscriptionsREST.java

@@ -60,6 +60,20 @@ public class SubscriptionsREST extends AbstractREST {
 		return Response.ok(Status.OK).build();
 	}
 
+	@GET
+	@Path("collapse")
+	public Response collapse(@QueryParam("id") String id,
+			@QueryParam("collapse") boolean collapse) {
+		Preconditions.checkNotNull(id);
+		if (!"all".equals(id)) {
+			FeedCategory category = feedCategoryService.findById(getUser(),
+					Long.valueOf(id));
+			category.setCollapsed(collapse);
+			feedCategoryService.update(category);
+		}
+		return Response.ok(Status.OK).build();
+	}
+
 	@POST
 	@Path("import")
 	@Consumes(MediaType.MULTIPART_FORM_DATA)
@@ -100,6 +114,7 @@ public class SubscriptionsREST extends AbstractREST {
 			List<FeedSubscription> subscriptions) {
 		Category category = new Category();
 		category.setId(String.valueOf(id));
+		category.setExpanded(true);
 
 		for (FeedCategory c : categories) {
 			if ((id == null && c.getParent() == null)
@@ -109,6 +124,7 @@ public class SubscriptionsREST extends AbstractREST {
 						subscriptions);
 				child.setId(String.valueOf(c.getId()));
 				child.setName(c.getName());
+				child.setExpanded(!c.isCollapsed());
 				category.getChildren().add(child);
 			}
 		}