module PIM::Statistics::Utils

# File statistics.rb, line 27
def collect_dates_from_history item, attribute, min_date = nil, max_date = nil, format = '%Y-%m-%d'
  dates = []
  date = to_date(item[attribute])
  dates << date.strftime(format) if date_between?(date, min_date, max_date)
  history_records(item).each do |record|
    value = record[attribute]
    next if is_empty?(value)
    if is_array?(value)
      date = to_date(value['oldValue__'])
    else
      date = to_date(value)
    end
    next if !date_between?(date, min_date, max_date)
    date = formatted_date(date)
    dates << date if not dates.include?(date)
  end
  dates
end

# File statistics.rb, line 69
def create_scope_block_for_item_scope_attribute_filter &attribute_transformer

  data_module = PIM.active_module
  return -> (scope, key, *dimensions) {
    matches_item_scope_attribute_filter?(data_module, scope, key, *dimensions, &attribute_transformer)
  }

end

# File statistics.rb, line 64
def filter_by_scope? scope, key, *dimensions, &scope_block
  return true if scope_block.nil?
  return scope_block.call(scope, key, *dimensions)
end

# File statistics.rb, line 46
def formatted_date date, format = '%Y-%m-%d'
  date.strftime(format)
end

# File statistics.rb, line 50
def get_array_param params, key
  param = params[key.to_sym] || params[key.to_s] || []
  param = [param] if not is_array?(param)
  param
end

# File statistics.rb, line 56
def get_item_values item, keys
  values = []
  keys.each do |key|
    values << item[key.to_s]
  end
  values
end

# File statistics.rb, line 13
def history_records item
  return [] if is_empty?(item) or is_empty?(item['history__'])
  history = item['history__']
  if history.is_a?(String)
    begin
      history = JSON.parse(history)
    rescue Exception => e
      log_error('Could not parse history', e)
      return []
    end
  end
  return history['history']
end

# File statistics.rb, line 78
def matches_item_scope_attribute_filter? data_module, scope, key, *dimensions, &attribute_transformer

  # Always match 'nil' scope
  return true if scope.nil?

  # Transform to attribute and check, if attribute matches the item-scope filters
  attribute = attribute_transformer.call(key, *dimensions)
  return false if attribute.nil?

  return data_module.matches_item_scope_attribute_filter?(attribute, scope)

end