Class: Goldberg::Menu

Inherits:
Object show all
Defined in:
lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb

Defined Under Namespace

Classes: Node

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(role = nil) ⇒ Menu

Returns a new instance of Menu.



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 82

def initialize(role = nil)
  @root = Node.new
  @by_id = Hash.new
  @by_name = Hash.new
  @selected = Hash.new
  @vector = Array.new
  @crumbs = Array.new

  items = nil

  if role
    if role.cache[:credentials].permission_ids.size > 0
      items = MenuItem.items_for_permissions(role.cache[:credentials].permission_ids)
    else  # role has no permissions
      # (items will remain as nil: the only node will be the root)
    end
  else  # No role given: build menu of everything
    items = MenuItem.items_for_permissions
  end

  if items
    if items.size > 0
      # Build hashes of items by name and id
      for item in items do
        node = Node.new
        node.setup(item)
        @by_id[item.id] = node
        @by_name[item.name] = node
      end

      # Then build tree of items
      for item in items do
        node = @by_id[item.id]
        p_id = node.parent_id
        if p_id
          if @by_id.has_key?(p_id)
            @by_id[p_id].add_child(node)
          end
        else
          @root.add_child(node)
        end
      end
    end  # if items.size > 0
    
    self.select(nil)
  end  # if items
  
end

Instance Attribute Details

#root ⇒ Object

Returns the value of attribute root.



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 80

def root
  @root
end

#selected ⇒ Object

Returns the name of the currently-selected item or nil if no item is selected.



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 173

def selected
  @selected
end

Instance Method Details

#crumbs ⇒ Object 



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 187

def crumbs
  crumbs = Array.new
  for crumb in @crumbs do
    item = get_item(crumb)
    crumbs << item
  end

  return crumbs
end

#get_item(item_id) ⇒ Object 



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 157

def get_item(item_id)
  return @by_id[item_id]
end

#get_menu(level) ⇒ Object

Returns the array of items at the given level.



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 162

def get_menu(level)
  if @vector.length > level
    return @vector[level].children
  else
    return []#nil
  end
end

#select(name) ⇒ Object

Selects the menu item for the given name, if it exists in this menu. If not returns nil.



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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 135

def select(name)
  if name and @by_name.has_key?(name)
    node = @by_name[name]
    @selected = Hash.new
    @vector = Array.new
    @crumbs = Array.new
    
    while node and node.id
      @selected[node.id] = node
      @vector.unshift node
      @crumbs.unshift node.id
      node = @by_id[node.parent_id]
    end
    @vector.unshift @root
    return @by_name[name]
  else
    if @root.children and @root.children.length > 0
      select(@by_id[@root.children[0]].name) 
    end
  end
end

#selected?(menu_id) ⇒ Boolean

Returns true if the specified item is selected; false if otherwise.

Returns:

  • (Boolean) 


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# File 'lib/six-updater-web/vendor/plugins/goldberg/app/models/goldberg/menu.rb', line 183

def selected?(menu_id)
  @selected.has_key?(menu_id) ? true : false
end