module RadarLookup

RadarLookup — orchestrate geocode, nearest radar, fetch, render, and IRC report. Public: lookup, parse_location Depends: geo_lookup, bom_radar_* modules, radar_report Tests: test/plugins/radar_test.rb

Public Instance Methods

lookup (location, fetch: nil, search: Geocoder.method(:search))

Source

# File lib/radar_lookup.rb, line 24
def lookup(location, fetch: nil, search: Geocoder.method(:search))
  place_text = parse_location(location)
  return RadarReport.build_usage unless place_text

  result = GeoLookup.lookup_place(place_text, search: search)
  return RadarReport.build_not_found(place_text) unless result

  coords = GeoLookup.coordinates_for(result)
  return RadarReport.build_not_found(place_text) unless coords

  lat, lon = coords
  site_match = BomRadarSites.nearest(lat, lon)
  site = site_match[:site]
  edge_note = site_match[:edge] ? "Near edge of #{site[:name]} radar coverage." : nil
  place_label = GeoLookup.location_label(result)

  fetcher = fetch || BomRadarFetch.default_fetch
  frame = BomRadarFetch.fetch_frame(site[:product_id], fetch: fetcher)
  return RadarReport.build_error("Radar image unavailable right now.") unless frame

  background = BomRadarFetch.fetch_background(site[:product_id], fetch: fetcher)
  grid = BomRadarImage.decode(frame[:bytes])
  render = BomRadarRender.render_map(
    grid,
    background_data: background,
    site: site,
    product_id: site[:product_id],
    query_lat: lat,
    query_lon: lon
  )
  observed = BomRadarFetch.format_timestamp(frame[:timestamp])

  RadarReport.build_report(
    place: place_label,
    site: site,
    map_lines: render[:lines],
    town_summaries: render[:summaries],
    observed: observed,
    edge_note: edge_note
  )
rescue StandardError
  RadarReport.build_error("Radar lookup failed.")
end

parse_location (text)

Source

# File lib/radar_lookup.rb, line 19
def parse_location(text)
  value = text.to_s.strip
  value.empty? ? nil : value
end