Add Roster report download, first pass

Issue #301: Built-in report pages, to replace dependency on external query dashboards.

app/controllers/scheduler/people_controller.rb

@@ -1,7 +1,7 @@
 class Scheduler::PeopleController < Scheduler::BaseController
   inherit_resources
   include Paginatable
-  respond_to :html
+  respond_to :html, :csv
   respond_to :js, only: :index
 
   defaults resource_class: Roster::Person

app/views/scheduler/people/index.csv.erb

@@ -0,0 +1,32 @@
+<%- headers = ['Name', 'Positions', 'Num Shifts', 'Prev Shift', 'Next Shift', 'Last Login', 'Flex Schedule'] -%>
+<%= CSV.generate_line headers -%>
+<%- collection.each do |person|
+  d = prev_shift(person)
+  if d
+    prev_shift = "#{d.to_s :dow_short} (#{(Date.current-d).to_i} days ago)"
+  else
+    prev_shift = ""
+  end
+  d = next_shift(person)
+  if d
+    next_shift = d.to_s :dow_short
+  else
+    next_shift = ""
+  end
+  d = person.last_login
+  if d
+    last_login = d.to_s :dow_short
+  else
+    last_login = ""
+  end
+  positions = person.positions.select{|p|!p.hidden}.map(&:name).join ", "
+-%>
+<%= CSV.generate_line([person.full_name,
+    positions,
+    pluralize(num_shifts(person), 'shift'),
+    prev_shift,
+    next_shift,
+    last_login,
+    flex_schedule_for(person.id).try(:num_shifts)
+   ]).html_safe -%>
+<%- end -%>

app/views/scheduler/people/index.html.haml

@@ -1,6 +1,8 @@
 - model_class = Roster::Person
 .page-header
-  %h1=t '.title', :default => model_class.model_name.human.pluralize
+  %h1
+    =t '.title', :default => model_class.model_name.human.pluralize
+    %span(style="font-size:60%") (#{link_to 'Download as CSV', scheduler_people_path(format: :csv, params: request.query_parameters.merge(page: 'all'))})
 =form_tag scheduler_people_path, method: :get, remote: true do
   =hidden_field_tag 'page', ''
   %table.table.table-condensed.noprint