Class: Krikri::Enrichments::SplitCoordinates

Inherits:
Object
  • Object
show all
Includes:
Audumbla::FieldEnrichment
Defined in:
lib/krikri/enrichments/split_coordinates.rb

Overview

Splits a string given in ‘lat’ or ‘long’ in an edm:Place object and assigns ‘lat’ and ‘long’ with the split values.

Examples:


Where val is a DPLA::MAP::Place,
and val.lat == '40.7127,74.0059',
assign val.lat = '40.7127' and val.long = '74.0059'

If long is filled in instead of lat, the values will be assigned in the
reverse order, with lat taking '74.0059' and long taking '40.7127'.

Instance Method Summary collapse

Instance Method Details

#assign_latlong!(place, lat, long) ⇒ Object 



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# File 'lib/krikri/enrichments/split_coordinates.rb', line 44

def assign_latlong!(place, lat, long)
  place.lat = lat if lat
  place.long = long if long
end

#coord_values(s) ⇒ Array

Given a String ‘s’, return an array of two elements split on a comma and any whitespace around the comma.

If the string does not split into two strings representing decimal values, then return [nil, nil] because the string does not make sense as coordinates.

Parameters:

  • s (String) —

    String of, hopefully, comma-separated decimals

Returns:

  • (Array) 


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# File 'lib/krikri/enrichments/split_coordinates.rb', line 60

def coord_values(s)
  coords = s.split(/ *, */)
  return [nil, nil] if coords.size != 2
  coords.map! { |c| c.to_f.to_s == c ? c : nil }   # must be decimal ...
  return [nil, nil] unless coords[0] && coords[1]  # ... i.e. not nil
  [coords[0], coords[1]]
end

#enrich_value(place) ⇒ DPLA::MAP::Place

Enrich a ‘DPLA::MAP::Place’ object by splitting the string given in its ‘lat’ or ‘long’.

place.lat and place.long are ActiveTriples::Terms, we only care about the first value. If multiple values are given, this enrichment will remove them.

Parameters:

  • place (DPLA::MAP::Place)

Returns:

  • (DPLA::MAP::Place) 


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# File 'lib/krikri/enrichments/split_coordinates.rb', line 29

def enrich_value(place)
  return place if !place.is_a? DPLA::MAP::Place
  return place unless splittable?(place.lat) || splittable?(place.long)

  if place.lat.any?
    latlong = coord_values(place.lat.first)
    assign_latlong!(place, latlong.first, latlong.last)
  elsif place.long.any?
    latlong = coord_values(place.long.first)
    assign_latlong!(place, latlong.last, latlong.first)
  end

  place
end