class GeoLocator

# File lib/geo_locator.rb, line 37
def self.locate(options = {})
  self.new.locate(options)
end

# File lib/geo_locator.rb, line 41
def initialize(options = {})
  @db = SQLite3::Database.open(File.expand_path("../geo_locator.sqlite3", File.dirname(__FILE__)))
  @format = options[:format] || options["format"] || :hash
end

# File lib/geo_locator.rb, line 8
def _locate(options = {})
  unless db = (options[:db] || options["db"])
    raise ArgumentError, "Options do not contain a db connection!"
  end

  location = options[:location] || options["location"]
  zip_code = options[:zip_code] || options["zip_code"]

  unless location || zip_code
    raise ArgumentError, "Options do not contains neither location nor zip_code!"
  end

  options[:format] = :hash unless options[:format] || options["format"]

  db_result = db.execute("SELECT lat, lon FROM locations WHERE #{location ? 'location LIKE \'' + location + '\'' : ''} #{location && zip_code ? 'AND' : ''} #{zip_code ? 'zip_code = \'' + zip_code.to_s + '\'' : ''}")

  db_result.map! do |row|
    lat = row[0]
    lon = row[1]

    case options[:format]
      when :array  then [lon, lat] # order conforms to GeoJSON and is supported as such be elasticsearch
      when :hash   then { lat: lat, lon: lon  }
      when :string then "#{lat},#{lon}"
    end
  end
end

# File lib/geo_locator.rb, line 46
def locate(options = {})
  options[:db] = @db
  options[:format] = options[:format] || options["format"] || @format

  self.class.send(:_locate, options)
end