Module: NestedArray::Nested

Extended by:
ActiveSupport::Concern
Included in:
Array, Array
Defined in:
lib/nested_array/nested.rb

Defined Under Namespace

Classes: Error

Instance Method Summary collapse

Instance Method Details

#concat_nested(tree = nil, options = {}) ⇒ Object

“Скеивание” вложенных структур ноды склеиваются если путь к ним одинаков; путь определяется из сложения Текстов (конфигурируемо через :path_key);



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# File 'lib/nested_array/nested.rb', line 342

def concat_nested tree=nil, options={}
  options = NESTED_OPTIONS.merge options
  return self if tree.nil?
  children_cache = {}
  tree.each_nested options do |node, parents, level|
    parent_path_names = parents.compact.map{|e| e[options[:path_key]]}
    parent_path = parent_path_names.join(options[:path_separator])
    path = parent_path_names.push(node[options[:path_key]]).join(options[:path_separator])
    element = node
    if !children_cache.keys.include? path
      if parent_path == ''
        array = self
      else
        array = children_cache[parent_path]
      end
      element[options[:children]] = []
      array << element
      children_cache[parent_path] = array
      children_cache[path] = element[options[:children]]
    end
  end
  self
end

#each_nested(options = {}) ⇒ Object

Перебирает вложенную стуктуру.



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# File 'lib/nested_array/nested.rb', line 44

def each_nested options={}
  options = NESTED_OPTIONS.merge options
  level = 0
  cache = []
  cache[level] = self.clone
  parents = []
  parents[level] = nil
  i = []
  i[level] = 0
  while level >= 0
    node = cache[level][i[level]]
    i[level]+= 1
    if node != nil
      is_last_children = cache[level][i[level]].blank?

      yield(node.clone, parents.clone, level, is_last_children, node.origin)

      if !node[options[:children]].nil? && node[options[:children]].length > 0
        level+= 1
        parents[level] = node.clone
        cache[level] = node[options[:children]]
        i[level] = 0
      end
    else
      parents[level] = nil
      level-= 1
    end
  end
  self
end

#each_nested!(options = {}) ⇒ Object 



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# File 'lib/nested_array/nested.rb', line 75

def each_nested! options={}
  options = NESTED_OPTIONS.merge options
  level = 0
  cache = []
  cache[level] = self
  parents = []
  parents[level] = nil
  i = []
  i[level] = 0
  while level >= 0
    node = cache[level][i[level]]
    i[level]+= 1
    if node != nil
      is_last_children = cache[level][i[level]].blank?

      yield(node, parents, level, is_last_children, node.origin)

      if !node[options[:children]].nil? && node[options[:children]].length > 0
        level+= 1
        parents[level] = node
        cache[level] = node[options[:children]]
        i[level] = 0
      end
    else
      parents[level] = nil
      level-= 1
    end
  end
  self
end

#nested_to_collection_select(options = {}) ⇒ Object

Преобразует вложенную структуру данных в плоскую, но добавляет в значение поля отвечающего за текстовое представление (:name) псевдографику древовидной структуры. Это позволяет вывести тэг select в сносном виде для использования с вложенными структурами.



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# File 'lib/nested_array/nested.rb', line 321

def nested_to_collection_select(options={})
  options = NESTED_OPTIONS.merge options
  ret = []
  last = []
  each_nested do |node, parents, level, is_last, origin|
    last[level+1] = is_last
    node_text = node[options[:option_text]]
    node_level = (1..level).map{|l| last[l] == true ? '&nbsp;' : '┃'}.join
    node_last = is_last ? '┗' : '┣'
    node_children = node[options[:children]].present? && node[options[:children]].length > 0 ? '┳' : '━'
    option_text = "#{node_level}#{node_last}#{node_children}╸".html_safe + "#{node_text}"
    option_value = node[options[:option_value]]
    node[options[:option_text]] = option_text
    ret.push node
  end
  ret
end

#nested_to_html(options = {}) ⇒ Object 



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# File 'lib/nested_array/nested.rb', line 244

def nested_to_html options={}
  options = NESTED_OPTIONS.merge options
  html = ''
  level = 0
  cache = []
  cache[level] = self.clone
  parents = []
  parents[level] = nil
  i = []
  i[level] = 0
  while level >= 0
    node = cache[level][i[level]]
    i[level]+= 1
    if node != nil

      node_html, node_options = yield(node.clone, parents.clone, level)
      html+= options[:tab] * (level * 2 + 1) if options[:tabulated]
      html+= node_options&.[](:li) || options[:li]
      html+= node_html.to_s

      if !node[options[:children]].nil? && node[options[:children]].length > 0
        level+= 1
        html+= "\n" if !options[:inline]
        html+= options[:tab] * (level * 2) if options[:tabulated]
        html+= node_options&.[](:ul) || options[:ul]
        html+= "\n" if !options[:inline]
        parents[level] = node.clone
        cache[level] = node[options[:children]]
        i[level] = 0
      else
        html+= options[:_li]
        html+= "\n" if !options[:inline]
      end
    else
      parents[level] = nil
      if level > 0
        html+= options[:tab] * (level * 2) if options[:tabulated]
        html+= options[:_ul]
        html+= "\n" if !options[:inline]
        html+= options[:tab] * (level * 2 - 1) if options[:tabulated]
        html+= options[:_li]
        html+= "\n" if !options[:inline]
      end
      level-= 1
    end
  end
  html.html_safe
end

#nested_to_options(options = {}) ⇒ Object

Возвращает массив для формирования опций html-тега <select> с псевдографикой, позволяющей вывести древовидную структуру. “‘

[‘option_text1’, ‘option_value1’],[‘option_text2’, ‘option_value2’],…

“‘



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# File 'lib/nested_array/nested.rb', line 299

def nested_to_options options={}
  options = NESTED_OPTIONS.merge options
  ret = []
  last = []
  each_nested do |node, parents, level, is_last|
    last[level+1] = is_last
    node_text = node[options[:option_text]]
    node_level = (1..level).map{|l| last[l] == true ? '&nbsp;' : '┃'}.join
    node_last = is_last ? '┗' : '┣'
    node_children = node[options[:children]].present? && node[options[:children]].length > 0 ? '┳' : '━'
    option_text = "#{node_level}#{node_last}#{node_children}╸".html_safe + "#{node_text}"
    option_value = node[options[:option_value]]
    ret.push [option_text, option_value]
  end
  ret
end

#to_nested(options = {}) ⇒ Object 



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# File 'lib/nested_array/nested.rb', line 106

def to_nested options={}
  options = NESTED_OPTIONS.merge options
  fields = {
    id: options[:id],
    parent_id: options[:parent_id],
    level: options[:level],
    children: options[:children],
  }
  fields.delete :level if !options[:add_level]
  cache = {}
  nested = options[:hashed] ? {} : []
  # Перебираем элементы в любом порядке!
  self.each do |value|
    origin = value
    value = value.serializable_hash if !value.is_a? Hash
    # 1. Если нет родителя текущего элемента, и текущий элемент не корневой, то:
    # 1.1 создадим родителя
    # 1.2 поместим в кэш
    if !(cache.key? value[fields[:parent_id]]) && (value[fields[:parent_id]] != options[:root_id])
      # 1.1
      temp = OpenStruct.new
      fields.each do |key, field|
        case key
        when :id
          temp[field] = value[fields[:parent_id]]
        when :children
          # не создаём поле
        else
          temp[field] = nil
        end
      end
      # 1.2
      cache[value[fields[:parent_id]]] = temp
    end
    # 2. Если текущий элемент уже был создан, значит он был чьим-то родителем, тогда:
    # 2.1 обновим в нем информацию
    # 2.2 поместим в родителя
    if cache.key? value[fields[:id]]
      # 2.1
      fields.each do |key, field|
        case key
        when :id, :children
          # не обновляем информацию
        else
          cache[value[fields[:id]]][field] = value[field]
        end
      end
      value.keys.each do |field|
        cache[value[fields[:id]]][field] = value[field] if !(field.in? fields)
      end
      cache[value[fields[:id]]].origin = origin
      # 2.2
      # Если текущий элемент не корневой - поместим в родителя, беря его из кэш
      if value[fields[:parent_id]] != options[:root_id]
        cache[value[fields[:parent_id]]][fields[:children]] ||= options[:hashed] ? {} : []
        if options[:hashed]
          cache[value[fields[:parent_id]]][fields[:children]][value[fields[:id]]] = nested[value[fields[:id]]]
        else
          cache[value[fields[:parent_id]]][fields[:children]] << cache[value[fields[:id]]]
        end
      # иначе, текущий элемент корневой, поместим в nested
      else
        if options[:hashed]
          nested[value[fields[:id]]] = cache[value[fields[:id]]]
        else
          nested << cache[value[fields[:id]]]
        end
      end
    # 3. Иначе, текущий элемент не создан, тогда:
    # 3.1 создадим элемент
    # 3.2 поместим в кэш
    # 3.3 поместим в родителя
    else
      # 3.1
      temp = OpenStruct.new
      fields.each do |key, field|
        case key
        when :id
          temp[field] = value[field]
        when :parent_id
          temp[field] = value[field]
        when :children
          # ничего не делаем
        else
          temp[field] = value[field]
        end
      end
      value.keys.each do |field|
        temp[field] = value[field] if !(field.in? fields)
      end
      temp.origin = origin
      # 3.2
      cache[value[fields[:id]]] = temp
      # 3.3
      # Если текущий элемент не корневой - поместим в родителя, беря его из кэш
      if value[fields[:parent_id]] != options[:root_id]
        cache[value[fields[:parent_id]]][fields[:children]] ||= options[:hashed] ? {} : []
        if options[:hashed]
          cache[value[fields[:parent_id]]][fields[:children]][value[fields[:id]]] = cache[value[fields[:id]]]
        else
          cache[value[fields[:parent_id]]][fields[:children]] << cache[value[fields[:id]]]
        end
      # иначе, текущий элемент корневой, поместим в nested
      else
        if options[:hashed]
          nested[value[fields[:id]]] = cache[value[fields[:id]]]
        else
          nested << cache[value[fields[:id]]]
        end
      end
    end
  end
  if options[:add_level]
    level = 0
    cache = []
    cache[level] = nested
    i = []
    i[level] = 0
    while level >= 0
      node = cache[level][i[level]]
      i[level]+= 1
      if node != nil

        node[options[:level]] = level

        if !node[options[:children]].nil? && node[options[:children]].length > 0
          level+= 1
          cache[level] = node[options[:children]]
          i[level] = 0
        end
      else
        level-= 1
      end
    end
  end
  nested
end