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require 'liquid'
Location = Struct.new(:lat, :lng, :radius, :speed, :course)
class Location
include LiquidDroppable
protected :[]=
def initialize(data = {})
super()
case data
when Array
raise ArgumentError, 'unsupported location data' unless data.size == 2
self.lat, self.lng = data
when Hash, Location
data.each { |key, value|
case key.to_sym
when :lat, :latitude
self.lat = value
when :lng, :longitude
self.lng = value
when :radius
self.radius = value
when :speed
self.speed = value
when :course
self.course = value
end
}
else
raise ArgumentError, 'unsupported location data'
end
yield self if block_given?
end
def lat=(value)
self[:lat] = floatify(value) { |f|
if f.abs <= 90
f
else
raise ArgumentError, 'out of bounds'
end
}
end
alias latitude lat
alias latitude= lat=
def lng=(value)
self[:lng] = floatify(value) { |f|
if f.abs <= 180
f
else
raise ArgumentError, 'out of bounds'
end
}
end
alias longitude lng
alias longitude= lng=
def radius=(value)
self[:radius] = floatify(value) { |f| f if f >= 0 }
end
def speed=(value)
self[:speed] = floatify(value) { |f| f if f >= 0 }
end
def course=(value)
self[:course] = floatify(value) { |f| f if (0..360).cover?(f) }
end
def present?
lat && lng
end
def empty?
!present?
end
def latlng
"#{lat},#{lng}"
end
private
def floatify(value)
case value
when nil, ''
return nil
else
float = Float(value)
if block_given?
yield(float)
else
float
end
end
end
end
class LocationDrop
KEYS = Location.members.map(&:to_s).concat(%w[latitude longitude latlng])
def liquid_method_missing(key)
if KEYS.include?(key)
@object.__send__(key)
end
end
end