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module Gattica
# Encapsulates the data returned by the GA API
class DataSet
include Convertible
attr_reader :total_results, :start_index, :items_per_page, :start_date,
:end_date, :points, :xml
def initialize(xml)
@xml = xml.to_s
@total_results = xml.at('openSearch:totalResults').inner_html.to_i
@start_index = xml.at('openSearch:startIndex').inner_html.to_i
@items_per_page = xml.at('openSearch:itemsPerPage').inner_html.to_i
@start_date = Date.parse(xml.at('dxp:startDate').inner_html)
@end_date = Date.parse(xml.at('dxp:endDate').inner_html)
@points = xml.search(:entry).collect { |entry| DataPoint.new(entry) }
end
# Returns a string formatted as a CSV containing just the data points.
#
# == Parameters:
# +format=:long+:: Adds id, updated, title to output columns
def to_csv(format=:short)
output = ''
columns = []
case format
when :long
["id", "updated", "title"].each { |c| columns << c }
end
unless @points.empty? # if there was at least one result
@points.first.dimensions.map {|d| d.keys.first}.each { |c| columns << c }
@points.first.metrics.map {|m| m.keys.first}.each { |c| columns << c }
end
output = CSV.generate_line(columns)
@points.each do |point|
output += point.to_csv(format)
end
output
end
def to_yaml
{ 'total_results' => @total_results,
'start_index' => @start_index,
'items_per_page' => @items_per_page,
'start_date' => @start_date,
'end_date' => @end_date,
'points' => @points }.to_yaml
end
def to_hash
@points.map(&:to_hash)
end
end
end
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