Class: Inventory

Inherits:
Object
  • Object
show all
Defined in:
lib/coding_challenge/commands/util/Inventory.rb

Constant Summary collapse

@@DEFAULT_PRODUCTS_LIST_URL = 
'https://gist.githubusercontent.com/michaelporter/b2743e0cdad0664fa9517c0a6b82cdda/raw/67e4606007391f678c9330ee3a77a9024fce4e64/products.json'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Inventory

Returns a new instance of Inventory.



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 14

def initialize
  @source_type = nil
  @source_uri = nil
  @products_list = nil
  @products_schema = nil
end

Instance Attribute Details

#products_list ⇒ Object (readonly)

Returns the value of attribute products_list.



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 13

def products_list
  @products_list
end

#source_type ⇒ Object (readonly)

Returns the value of attribute source_type.



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 13

def source_type
  @source_type
end

#source_uri ⇒ Object (readonly)

Returns the value of attribute source_uri.



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 13

def source_uri
  @source_uri
end

Instance Method Details

#handle_query(query) ⇒ Object

Raises:



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 21

def handle_query(query)
  product_options_schema = @products_schema[query.product_type.downcase]
  is_invalid_product_type = product_options_schema.nil?
  raise InvalidProductTypeError, query.product_type if is_invalid_product_type

  results = []
  product_options_schema.each_with_index do |(option_type, option_values_map), arg_position|
    option_argument = query.options[arg_position]
    is_argument_provided = !option_argument.nil?

    if is_argument_provided
      is_invalid_argument = !option_values_map.key?(option_argument)
      raise InvalidOptionError.new(query.product_type, option_type, option_argument) if is_invalid_argument
    else
      possible_option_values = option_values_map.keys
      results << "#{option_type.capitalize}: #{possible_option_values.join(', ')}"
    end
  end

  query.results = results
  query
end

#load_products_list_from_default ⇒ Object 



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 55

def load_products_list_from_default
  begin
    products_list = load_from_file_url(@@DEFAULT_PRODUCTS_LIST_URL)
    raise StandardError if products_list.nil?
  rescue StandardError
    raise FileReadError, source_uri
  end
  set_as_data_source('DEFAULT', @@DEFAULT_PRODUCTS_LIST_URL, products_list)
end

#load_products_list_from_source(source_type, source_uri) ⇒ Object 



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# File 'lib/coding_challenge/commands/util/Inventory.rb', line 44

def load_products_list_from_source(source_type, source_uri)
  begin
    products_list = load_from_file_path(source_uri) if source_type == 'FILE PATH'
    products_list = load_from_file_url(source_uri) if source_type == 'URL'
    raise StandardError if products_list.nil?
  rescue StandardError
    raise FileReadError, source_uri
  end
  set_as_data_source(source_type, source_uri, products_list)
end