event for downloading collections

core/src/main/groovy/com/muwire/core/collections/UIDownloadCollectionEvent.groovy

@@ -0,0 +1,12 @@
+package com.muwire.core.collections
+
+import com.muwire.core.Event
+import com.muwire.core.Persona
+
+class UIDownloadCollectionEvent extends Event {
+
+    FileCollection collection
+    Set<FileCollectionItem> items
+    boolean full
+    Persona host
+}

gui/griffon-app/controllers/com/muwire/gui/CollectionTabController.groovy

@@ -6,7 +6,9 @@ import griffon.inject.MVCMember
 import griffon.metadata.ArtifactProviderFor
 import javax.annotation.Nonnull
 
+import com.muwire.core.collections.FileCollection
 import com.muwire.core.collections.FileCollectionItem
+import com.muwire.core.collections.UIDownloadCollectionEvent
 
 @ArtifactProviderFor(GriffonController)
 class CollectionTabController {
@@ -15,14 +17,46 @@ class CollectionTabController {
     @MVCMember @Nonnull
     CollectionTabView view
 
+    private FileCollection selectedCollection() {
+        int row = view.selectedCollection()
+        if (row < 0)
+            return null
+        
+        return model.collections.get(row)
+    }
+    
     @ControllerAction
     void downloadCollection() {
+        FileCollection collection = selectedCollection()
+        if (collection == null)
+            return
             
+        UIDownloadCollectionEvent e = new UIDownloadCollectionEvent(
+            collection : collection,
+            items : collection.getFiles(),
+            full : true,
+            host : model.host
+            )
+        model.eventBus.publish(e)
     }
     
     @ControllerAction
     void download() {
+        FileCollection collection = selectedCollection()
+        if (collection == null)
+            return
         
+        List<FileCollectionItem> items = view.selectedItems()
+        if (items.isEmpty())
+            return
+            
+        UIDownloadCollectionEvent e = new UIDownloadCollectionEvent(
+                collection : collection,
+                items : new HashSet<>(items),
+                full : false,
+                host : model.host
+                )
+        model.eventBus.publish(e)
     }
     
     @ControllerAction