Class: CrePropertyMatcher::PropertyMatcher

Inherits:
Object
  • Object
show all
Includes:
PropertyDataCalculator
Defined in:
lib/cre_property_matcher.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PropertyDataCalculator

#get_average_by_attribute, #get_average_by_reference_property_state, #get_average_by_reference_property_state_and_property_type, #get_average_for_all_by_property_type

Constructor Details

#initialize(reference_property) ⇒ PropertyMatcher

Returns a new instance of PropertyMatcher.



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# File 'lib/cre_property_matcher.rb', line 11

def initialize(reference_property)
  @reference_property = Property.new(reference_property)
  @comparison_properties = PropertyDataLoader.run_and_return_properties
  @features = [:@appraised_value, :@noi, :@ncf, :@uw_revenue, :@uw_expenses]
  @scales = scale_features
end

Instance Attribute Details

#comparison_properties ⇒ Object

Returns the value of attribute comparison_properties.



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# File 'lib/cre_property_matcher.rb', line 9

def comparison_properties
  @comparison_properties
end

#reference_property ⇒ Object

Returns the value of attribute reference_property.



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# File 'lib/cre_property_matcher.rb', line 9

def reference_property
  @reference_property
end

Instance Method Details

#calculate_distances ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 86

def calculate_distances
  props = get_suitable_comps
  reference.calculate_distance_from_neighbors(props, features, scales)
end

#comps ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 22

def comps
  @comparison_properties
end

#features ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 44

def features
  @features
end

#filter_by_feature(feature) ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 68

def filter_by_feature(feature)
  result = []
  comps.each do |property|
    result << property.instance_variable_get(feature)
  end
  result
end

#get_k_nearest(k = 3) ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 95

def get_k_nearest(k = 3)
  sort_comps_by_distance.take(k)
end

#get_suitable_comps ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 26

def get_suitable_comps
  suitable = []
  
  comps.each do |property|
    all_features_not_nil = true
    features.each do |feature|
      unless property.instance_variable_get(feature)
        all_features_not_nil = false
      end
    end
    if all_features_not_nil
      suitable << property
    end
  end

  suitable
end

#head_comparison_properties(n = 6) ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 52

def head_comparison_properties(n = 6)
  result = []
  1.upto(n) do |index|
    result << comps[index]
  end
  result
end

#property_type_count ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 60

def property_type_count
  count_hash = Hash.new(0)
  @comparison_properties.each do |property|
    count_hash[property.general_property_type] += 1
  end
  count_hash
end

#reference ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 18

def reference
  @reference_property
end

#scale_features ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 76

def scale_features
  scales = {}
  features.each do |feature|
    array = filter_by_feature(feature).compact
    
    scales[feature] = {min: array.min, max: array.max, range: array.max - array.min}
  end
  scales
end

#scales ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 48

def scales
  @scales
end

#sort_comps_by_distance ⇒ Object 



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# File 'lib/cre_property_matcher.rb', line 91

def sort_comps_by_distance
  comps.sort { |a, b| a.distance <=> b.distance }
end