Allow configuration of task periods

app/models/periodic_task_group.rb

@@ -1,8 +1,6 @@
 class PeriodicTaskGroup < ActiveRecord::Base
   has_many :tasks, dependent: :destroy
 
-  PeriodDays = 7
-  
   def has_next_task?
     return false if tasks.empty?
     return false if tasks.first.due_date.nil?
@@ -11,13 +9,13 @@ class PeriodicTaskGroup < ActiveRecord::Base
 
   def create_next_task
     template_task = tasks.first
-    self.next_task_date ||= template_task.due_date + PeriodDays
+    self.next_task_date ||= template_task.due_date + period_days
     
     next_task = template_task.dup
     next_task.due_date = next_task_date    
     next_task.save
 
-    self.next_task_date += PeriodDays
+    self.next_task_date += period_days
     self.save
   end
 
@@ -26,4 +24,12 @@ class PeriodicTaskGroup < ActiveRecord::Base
       t.update_attribute(:periodic_task_group, nil)
     end
   end
+
+  protected
+
+  # @return [Number] Number of days between two periodic tasks
+  def period_days
+    # minimum of one to avoid inifite loop when value is invalid
+    [FoodsoftConfig[:tasks_period_days].to_i, 1].max
+  end
 end

app/models/task.rb

@@ -36,8 +36,8 @@ class Task < ActiveRecord::Base
   end
 
 
-  # find all tasks in the next week (or another number of days)
-  def self.next_assigned_tasks_for(user, number = 7)
+  # find all tasks in the period (or another number of days)
+  def self.next_assigned_tasks_for(user, number = FoodsoftConfig[:tasks_period_days].to_i)
     user.tasks.undone.where(assignments: {accepted: true}).
         where(["tasks.due_date >= ? AND tasks.due_date <= ?", Time.now, number.days.from_now])
   end

app/views/admin/configs/_tab_tasks.html.haml

@@ -1,3 +1,15 @@
 -#= config_use_heading form, :use_tasks do
+%fieldset
+  %label
+    %h4= t '.periodic_title'
+  = config_input form, :tasks_period_days do
+    .input-append
+      = config_input_field form, :tasks_period_days, as: :numeric, class: 'input-mini'
+      %span.add-on days
+  = config_input form, :tasks_upfront_days do
+    .input-append
+      = config_input_field form, :tasks_upfront_days, as: :numeric, class: 'input-mini'
+      %span.add-on days
+
 = config_use_heading form, :use_apple_points do
   = config_input form, :stop_ordering_under, as: :numeric, input_html: {class: 'input-small'}