module TaiwanCity

# File lib/taiwan_city.rb, line 36
def city(code)
  match(code)[1].ljust(5, '0')
end

# File lib/taiwan_city.rb, line 25
def get(id, options = {})
  return '' if id.blank?
  prepend_parent = options[:prepend_parent] || false
  children = data
  return children[id][:text] if children.has_key?(id)
  city_id = city(id)
  city_text = children[city_id][:text]
  children = children[city_id][:children]
  return "#{prepend_parent ? (city_text) : ''}#{children[id][:text]}"
end

# File lib/taiwan_city.rb, line 9
def list(parent_id = '00000')
  result = []
  return result if parent_id.blank?
  city_id = city(parent_id)
  children = data
  children = children[city_id][:children] if children.has_key?(city_id)
  children.each_key do |id|
    result.push [ children[id][:text], id]
  end

  #sort
  result.sort! {|a, b| a[1] <=> b[1]}
  result
end

# File lib/taiwan_city.rb, line 41
def data
  unless @list
    #{ '440000' =>
    #  {
    #    :text => '广东',
    #    :children =>
    #      {
    #        '440300' =>
    #          {
    #            :text => '深圳',
    #            :children =>
    #              {
    #                '440305' => { :text => '南山' }
    #              }
    #           }
    #       }
    #   }
    # }
    @list = {}
    #@see: http://github.com/RobinQu/LocationSelect-Plugin/raw/master/areas_1.0.json
    json = JSON.parse(File.read("#{Engine.root}/db/areas.json"))
    districts = json.values.flatten
    districts.each do |district|
      id = district['id']
      text = district['text']
      if id.end_with?('000')
        @list[id] =  {:text => text, :children => {}}
      else
        city_id = city(id)
        @list[city_id] = {:text => text, :children => {}} unless @list.has_key?(city_id)
        @list[city_id][:children][id] = {:text => text}
      end
    end
  end
  @list
end

# File lib/taiwan_city.rb, line 78
def match(code)
  code.match(PATTERN)
end