class CartoCSSHelper::NotesDownloader

Public Class Methods

cache_filename(lat, lon, range) click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 7
def self.cache_filename(lat, lon, range)
  url = NotesDownloader.format_query_into_url(lat, lon, range)
  return CartoCSSHelper::Configuration.get_path_to_folder_for_notes_api_cache + url.delete("/") + ".cache"
end
cache_timestamp(lat, lon, range) click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 20
def self.cache_timestamp(lat, lon, range)
  downloader = GenericCachedDownloader.new
  file = cache_filename(lat, lon, range)
  return downloader.get_cache_timestamp(file)
end
format_query_into_url(lat, lon, range) click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 30
def self.format_query_into_url(lat, lon, range)
  # documentated at http://wiki.openstreetmap.org/wiki/API_v0.6#Map_Notes_API
  bbox = osm_api_bbox_string(lat, lon, range)
  base_url = "http://api.openstreetmap.org/api/0.6/notes"
  return "#{base_url}?bbox=#{bbox}?closed=0"
end
get_allowed_timeout_in_seconds() click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 26
def self.get_allowed_timeout_in_seconds
  return 10 * 60
end
osm_api_bbox_string(latitude, longitude, size) click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 37
def self.osm_api_bbox_string(latitude, longitude, size)
  # bbox=left,bottom,right,top
  min_latitude = latitude - size / 2
  max_latitude = latitude + size / 2
  min_longitude = longitude - size / 2
  max_longitude = longitude + size / 2
  return "#{min_longitude},#{min_latitude},#{max_longitude},#{max_latitude}"
end
run_note_query(lat, lon, range, invalidate_cache: false) click to toggle source
# File lib/cartocss_helper/notes_downloader.rb, line 12
def self.run_note_query(lat, lon, range, invalidate_cache: false)
  timeout = NotesDownloader.get_allowed_timeout_in_seconds
  downloader = GenericCachedDownloader.new(timeout: timeout, stop_on_timeout: false)
  file = cache_filename(lat, lon, range)
  url = NotesDownloader.format_query_into_url(lat, lon, range)
  return downloader.get_specified_resource(url, file, invalidate_cache: invalidate_cache)
end