Method: AMEE::Data::Item.from_json

Defined in:
lib/amee/data_item.rb

.from_json(json) ⇒ Object 



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# File 'lib/amee/data_item.rb', line 37

def self.from_json(json)
  # Read JSON
  doc = JSON.parse(json)
  begin
    data = {}
    data[:uid] = doc['dataItem']['uid']
    data[:created] = DateTime.parse(doc['dataItem']['created'])
    data[:modified] = DateTime.parse(doc['dataItem']['modified'])
    data[:name] = doc['dataItem']['name']
    data[:path] = doc['path']
    data[:label] = doc['dataItem']['label']
    data[:item_definition] = doc['dataItem']['itemDefinition']['uid']
    data[:category_uid] = doc['dataItem']['dataCategory']['uid']
    # Read v2 total
    data[:total_amount] = doc['amount']['value'] rescue nil
    data[:total_amount_unit] = doc['amount']['unit'] rescue nil
    # Read v1 total
    if data[:total_amount].nil?
      data[:total_amount] = doc['amountPerMonth'] rescue nil
      data[:total_amount_unit] = "kg/month"
    end
    # Get values
    data[:values] = []
    doc['dataItem']['itemValues'].each do |value|
      value_data = {}
      value_data[:name] = value['name']
      value_data[:path] = value['path']
      value_data[:value] = value['value']
      value_data[:drill] = value['itemValueDefinition']['drillDown'] rescue nil
      value_data[:uid] = value['uid']
      data[:values] << value_data
    end
    # Get choices
    data[:choices] = []
    doc['userValueChoices']['choices'].each do |choice|
      choice_data = {}
      choice_data[:name] = choice['name']
      choice_data[:value] = choice['value']
      data[:choices] << choice_data
    end
    data[:start_date] = DateTime.parse(doc['dataItem']['startDate']) rescue nil
    # Create object
    Item.new(data)
  rescue
    raise AMEE::BadData.new("Couldn't load DataItem from JSON. Check that your URL is correct.\n#{json}")
  end
end