Class: Maguire::DataSet

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/maguire/data_set.rb

Defined Under Namespace

Classes: NoDataFound

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DataSet

Returns a new instance of DataSet.



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# File 'lib/maguire/data_set.rb', line 9

def initialize()
  @cache = {}
  @paths = []
end

Instance Method Details

#<<(path) ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 18

def <<(path)
  clear_cache!
  @paths << path
end

#clear ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 27

def clear
  clear_cache!
  @paths = []
end

#clear_cache! ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 23

def clear_cache!
  @cache = {}
end

#each(&block) ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 14

def each(&block)
  @paths.each(&block)
end

#load(id) ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 32

def load(id)
  return @cache[id.to_sym] if @cache && @cache[id.to_sym]

  data_sets = map do |data_path|
    path = data_path.join("#{id}.json")
    if File.exists?(path)
      JSON.parse(File.read(path), symbolize_names: true)
    else
      {}
    end
  end

  merged_data = merge_data(data_sets)
  if merged_data.empty?
    raise NoDataFound.new(@paths.join(':'))
  end

  @cache[id.to_sym] = merged_data
end

#merge_data(data_sets) ⇒ Object 



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# File 'lib/maguire/data_set.rb', line 52

def merge_data(data_sets)
  merged_set = Maguire::Hash.merge(data_sets)
  if merged_set[:enabled] == false
    nil
  else
    merged_set
  end
end