demarches-normaliennes/app/controllers/stats_controller.rb

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class StatsController < ApplicationController
def index
procedures = Procedure.where(:published => true)
dossiers = Dossier.where.not(:state => :draft)
@procedures_30_days_flow = thirty_days_flow_hash(procedures)
@dossiers_30_days_flow = thirty_days_flow_hash(dossiers, :initiated_at)
@procedures_cumulative = cumulative_hash(procedures)
@dossiers_cumulative = cumulative_hash(dossiers, :initiated_at)
@procedures_count = procedures.count
@dossiers_count = dossiers.count
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end
private
def thirty_days_flow_hash(association, date_attribute = :created_at)
min_date = 30.days.ago.to_date
max_date = Time.now.to_date
thirty_days_flow_hash = association
.where(date_attribute => min_date..max_date)
.group("date_trunc('day', #{date_attribute.to_s})")
.count
clean_hash(thirty_days_flow_hash, min_date, max_date)
end
def clean_hash(h, min_date, max_date)
# Convert keys to date
h = Hash[h.map { |(k, v)| [k.to_date, v] }]
# Add missing vales where count is 0
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(min_date..max_date).each do |date|
if h[date].nil?
h[date] = 0
end
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end
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h
end
def cumulative_hash(association, date_attribute = :created_at)
sum = 0
association
.group("DATE_TRUNC('month', #{date_attribute.to_s})")
.count
.to_a
.sort{ |x, y| x[0] <=> y[0] }
.map { |x, y| { x => (sum += y)} }
.reduce({}, :merge)
end
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end