diff options
Diffstat (limited to 'app/controllers/public_body_controller.rb')
| -rw-r--r-- | app/controllers/public_body_controller.rb | 103 |
1 files changed, 102 insertions, 1 deletions
diff --git a/app/controllers/public_body_controller.rb b/app/controllers/public_body_controller.rb index 374866eda..2c8d83f6f 100644 --- a/app/controllers/public_body_controller.rb +++ b/app/controllers/public_body_controller.rb @@ -6,6 +6,7 @@ # Email: hello@mysociety.org; WWW: http://www.mysociety.org/ require 'fastercsv' +require 'confidence_intervals' class PublicBodyController < ApplicationController # XXX tidy this up with better error messages, and a more standard infrastructure for the redirect to canonical URL @@ -149,6 +150,107 @@ class PublicBodyController < ApplicationController :disposition =>'attachment', :encoding => 'utf8') end + def statistics + per_graph = 10 + minimum_requests = 1 + total_column = 'info_requests_count' + graphs = + [[total_column, + [{ + :title => 'Public bodies with the most requests', + :y_axis => 'Number of requests', + :highest => true}]], + ['info_requests_successful_count', + [{ + :title => 'Public bodies with the most successful requests', + :y_axis => 'Percentage of total requests', + :highest => true}, + { + :title => 'Public bodies with the fewest successful requests', + :y_axis => 'Percentage of total requests', + :highest => false}]], + ['info_requests_overdue_count', + [{ + :title => 'Public bodies with most overdue requests', + :y_axis => 'Percentage of requests that are overdue', + :highest => true}]], + ['info_requests_not_held_count', + [{ + :title => 'Public bodies that most frequently replied with "Not Held"', + :y_axis => 'Percentage of total requests', + :highest => true}]]] + + @graph_list = [] + + graphs.each do |column, graphs_properties| + graphs_properties.each do |graph_properties| + ordering = "y_value" + reverse = false + percentages = (column != total_column) + if graph_properties[:highest] + ordering = "y_value DESC" + reverse = true + end + y_value_column = total_column + if percentages + y_value_column = "(cast(#{column} as float) / #{total_column})" + end + where_clause = "#{total_column} >= #{minimum_requests}" + public_bodies = PublicBody.select("*, #{y_value_column} AS y_value").order(ordering).where(where_clause).limit(per_graph) + public_bodies.reverse! if reverse + + x_values = public_bodies.each_with_index.map { |public_body, index| index } + y_values = public_bodies.map { |pb| pb.y_value.to_f } + cis_below = nil + cis_above = nil + + if percentages + original_values = public_bodies.map { |pb| pb.send(column) } + original_totals = public_bodies.map { |pb| pb.send(total_column) } + # Calculate confidence intervals: + cis_below = [] + cis_above = [] + original_totals.each_with_index.map { |total, i| + lower_ci, higher_ci = ci_bounds original_values[i], total, 0.05 + cis_below.push(y_values[i] - lower_ci) + cis_above.push(higher_ci - y_values[i]) + } + # Turn the y values and confidence interval into + # percentages: + [y_values, cis_below, cis_above].each { |l| + l.map! { |v| 100 * v } + } + end + + y_max = y_values.max + if percentages + y_max = 100 + end + + graph_id = "#{column}-" + graph_id += graph_properties[:highest] ? 'highest' : 'lowest' + + @graph_list.push({ + 'id' => graph_id, + 'errorbars' => percentages, + 'title' => graph_properties[:title], + 'x_values' => x_values, + 'y_values' => y_values, + 'cis_below' => cis_below, + 'cis_above' => cis_above, + 'x_axis' => 'Public Bodies', + 'x_ticks' => public_bodies.each_with_index.map { |pb, i| [i, pb.name] }, + 'y_axis' => graph_properties[:y_axis], + 'y_max' => y_max}) + end + end + + respond_to do |format| + format.html { render :template => "public_body/statistics" } + format.json { render :json => @graph_list } + end + end + # Type ahead search def search_typeahead # Since acts_as_xapian doesn't support the Partial match flag, we work around it @@ -158,4 +260,3 @@ class PublicBodyController < ApplicationController render :partial => "public_body/search_ahead" end end - |