Class: Starline::Entities::DistanceFilter

Inherits:
Object
  • Object
show all
Defined in:
lib/starline/entities/distance_filter.rb

Constant Summary collapse

FILTERS =

Supported filter names

%i(eq ne gt lt gte lte)
OPERATORS =

Mapping between filter names and its ruby functions

{
  :eq  => :==,
  :ne  => :!=,
  :gt  => :>,
  :lt  => :<,
  :gte => :>=,
  :lte => :<=
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(search_params_hash) ⇒ DistanceFilter

Initialize DistanceFilter object from Hash.

Usage

DistanceFilter.new(gt: 5.4)

Supports only one filter as search parameterfor now.



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# File 'lib/starline/entities/distance_filter.rb', line 26

def initialize(search_params_hash)
  raise_invalid_argument_type_error unless search_params_hash.is_a?(Hash)
  raise_unknown_filter_error if search_params_hash.empty?
  raise_ambiguous_filter_error if search_params_hash.size > 1

  @type  = search_params_hash.keys.first
  @value = search_params_hash.values.first

  raise_unknown_filter_error unless supported_filter?
  raise_invalid_value_error unless valid_value?
end

Instance Attribute Details

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/starline/entities/distance_filter.rb', line 17

def type
  @type
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/starline/entities/distance_filter.rb', line 17

def value
  @value
end

Instance Method Details

#apply_to(collection) ⇒ Object

Applies filter to a given collection.

Usage

filter.apply_to(tracks)

Returns a collection with items which satisfy the current filter



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# File 'lib/starline/entities/distance_filter.rb', line 45

def apply_to(collection)
  collection.select { |item| item.distance.send(operator, @value) }
end