Class: Geogov::Mapit

Inherits:
Object
  • Object
show all
Defined in:
lib/geogov/providers/mapit.rb

Defined Under Namespace

Classes: Method

Instance Method Summary collapse

Constructor Details

#initialize(default_url = "http://mapit.mysociety.org") ⇒ Mapit

Returns a new instance of Mapit.



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# File 'lib/geogov/providers/mapit.rb', line 32

def initialize(default_url = "http://mapit.mysociety.org")
  @base = default_url
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 129

def method_missing(method, *args, &block)
  if valid_mapit_methods.include?(method)
    Mapit::Method.new(method.to_s, args).call(@base)
  else
    super(method, *args, &block)
  end
end

Instance Method Details

#areas_for_stack_from_coords(lat, lon) ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 63

def areas_for_stack_from_coords(lat, lon)
  query = self.point("4326", [lon, lat])
  results = {:point => {'lat' => lat, 'lon' => lon}}
  councils = { }

  areas = Hash[query.select {|key, value| key =~ /^\d+$/}]
  areas.each do |id, area_info|
    type = area_info['type'].upcase.to_sym
    level = translate_area_type_to_shortcut(area_info['type'])

    if level
      level = level.downcase.to_sym
      results[level] = [] unless results[level]
      level_info = area_info.select { |k, v| ["name", "id", "type"].include?(k) }
      level_info['ons'] = area_info['codes']['ons'] if area_info['codes'] && area_info['codes']['ons']
      results[level] << level_info
      results[:nation] = area_info['country_name'] if results[:nation].nil?
    end

    councils[type] = { 'name' => area_info['name'], 'type' => area_info['type'], 'id' => area_info['id'] }
  end

  return councils.merge results
end

#areas_for_stack_from_postcode(postcode) ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 88

def areas_for_stack_from_postcode(postcode)
  query = self.postcode(postcode)
  results = {}

  if query && query['areas']

    query['areas'].each do |i, area|
      type = area['type'].to_sym
      results[type] = area
    end

    query['shortcuts'].each do |typ, i|
      if i.is_a? Hash
        ids = i.values()
      else
        ids = [i]
      end
      ids.each do |id|
        area_info = query['areas'][id.to_s]
        level = typ.downcase.to_sym
        results[level] = [] unless results[level]
        level_info = area_info.select { |k, v| ["name", "id", "type"].include?(k) }
        level_info['ons'] = area_info['codes']['ons'] if area_info['codes'] && area_info['codes']['ons']
        results[level] << level_info
        results[:nation] = area_info['country_name'] if results[:nation].nil?
      end
    end
    lat, lon = query['wgs84_lat'], query['wgs84_lon']
    results[:point] = {'lat' => lat, 'lon' => lon}
  end
  return results
end

#centre_of_district(district_postcode) ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 121

def centre_of_district(district_postcode)
  query = self.postcode("partial", district_postcode)
  if query
    lat, lon = query['wgs84_lat'], query['wgs84_lon']
    return {'lat' => lat, 'lon' => lon}
  end
end

#lat_lon_from_postcode(postcode) ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 44

def lat_lon_from_postcode(postcode)
  areas = areas_for_stack_from_postcode(postcode)
  areas[:point] or raise UnrecognizedLocationError
end

#respond_to?(sym) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/geogov/providers/mapit.rb', line 40

def respond_to?(sym)
  valid_mapit_methods.include?(sym) || super(sym)
end

#translate_area_type_to_shortcut(area_type) ⇒ Object

Borrowed heavily from mapit’s pylib/postcodes/views.py with some amendments based on pylib/mapit/areas/models.py



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# File 'lib/geogov/providers/mapit.rb', line 51

def translate_area_type_to_shortcut(area_type)
  if ['COP', 'LBW', 'LGE', 'MTW', 'UTE', 'UTW', 'DIW'].include?(area_type)
    return 'ward'
  elsif ['CTY', 'CED', 'MTD', 'UTA', 'DIS', 'LBO', 'LGD'].include?(area_type)
    return 'council'
  elsif area_type == 'EUR'
    return 'region'
  elsif area_type == 'WMC' # XXX Also maybe 'EUR', 'NIE', 'SPC', 'SPE', 'WAC', 'WAE', 'OLF', 'OLG', 'OMF', 'OMG')
    return 'WMC'
  end
end

#valid_mapit_methods ⇒ Object 



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# File 'lib/geogov/providers/mapit.rb', line 36

def valid_mapit_methods
  [:postcode, :areas, :area, :point, :generations]
end