Class: Locca::CollectionMerger

Inherits:
Object
  • Object
show all
Defined in:
lib/locca/collection_merger.rb

Constant Summary collapse

ACTION_ADD = 
(1 << 0)
ACTION_DELETE = 
(1 << 1)
ACTION_UPDATE = 
(1 << 2)
ACTION_UPDATE_COMMENTS = 
(1 << 3)

Instance Method Summary collapse

Instance Method Details

#merge(src_collection, dst_collection, actions = (ACTION_ADD | ACTION_DELETE)) ⇒ Object 



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# File 'lib/locca/collection_merger.rb', line 32

def merge(src_collection, dst_collection, actions = (ACTION_ADD | ACTION_DELETE))
    if not src_collection or not dst_collection
        raise ArgumentError, 'Source and Destination Collections should be set'
    end

    dst_keys = nil
    if (actions & ACTION_DELETE) != 0
        dst_keys = dst_collection.all_keys
    end

    src_collection.each do |src_item|
        dst_item = dst_collection.item_for_key(src_item.key)

        if (actions & ACTION_ADD) != 0 && !dst_item
            dst_collection.add_item(src_item.dup)
        elsif (actions & ACTION_UPDATE) != 0 && dst_item
            dst_collection.add_item(src_item.dup)
        elsif (actions & ACTION_UPDATE_COMMENTS) != 0 && dst_item
            item = CollectionItem.new(dst_item.key, dst_item.value, src_item.comment)
            dst_collection.add_item(item)
        end

        if dst_keys
            dst_keys.delete(src_item.key)
        end
    end

    if dst_keys
        dst_keys.each do |key|
            dst_collection.remove_item_for_key(key)
        end
    end
end