Add option to restrict ordering when not enough apples.

app/controllers/group_orders_controller.rb

@@ -5,6 +5,7 @@ class GroupOrdersController < ApplicationController
   before_filter :ensure_ordergroup_member
   before_filter :ensure_open_order, :only => [:new, :create, :edit, :update, :order, :stock_order, :saveOrder]
   before_filter :ensure_my_group_order, only: [:show, :edit, :update]
+  before_filter :enough_apples?, only: [:new, :create]
 
   # Index page.
   def index
@@ -88,4 +89,12 @@ class GroupOrdersController < ApplicationController
     redirect_to group_orders_url, alert: 'Fehlerhafte URL, das ist nicht Deine Bestellung.'
   end
 
+  def enough_apples?
+    if @ordergroup.not_enough_apples?
+      redirect_to group_orders_url,
+                  alert: t('not_enough_apples', scope: 'group_orders.messages', apples: @ordergroup.apples,
+                           stop_ordering_under: FoodsoftConfig[:stop_ordering_under])
+    end
+  end
+
 end

app/models/ordergroup.rb

@@ -72,6 +72,15 @@ class Ordergroup < Group
     ((avg_jobs_per_euro / Ordergroup.avg_jobs_per_euro) * 100).to_i rescue 0
   end
 
+  # If the the option stop_ordering_under is set, the ordergroup is only allowed to participate in an order,
+  # when the apples value is above the configured amount.
+  # Only ordergroups, which have participated in more than 5 order are affected
+  def not_enough_apples?
+    FoodsoftConfig[:stop_ordering_under].present? and
+        apples < FoodsoftConfig[:stop_ordering_under] and
+        group_orders.count > 5
+  end
+
   # Global average
   def self.avg_jobs_per_euro
     stats = Ordergroup.all.collect(&:stats)

app/views/home/_apple_bar.html.haml

@@ -0,0 +1,14 @@
+Engagement Deiner Bestellgruppe
+.stats-bar{style: "width:#{apple_bar.length_of_group_bar}px; background-color:#{apple_bar.group_bar_color}"}
+  = apple_bar.apples
+  = " Äpfel" if apple_bar.length_of_group_bar > 50
+
+Durchschnittsengagement
+.stats-bar{style: "width:#{apple_bar.length_of_global_bar}px"}
+  100 Birnen
+
+%span.description
+  Abgebildet ist das Verhältnis von erledigten Aufgaben zu dem Bestellvolumen Deiner Bestellgruppe im Vergleich zum Durchschnitt in der Foodcoop.
+  Konkret: Pro #{number_to_currency(apple_bar.mean_order_amount_per_job, :precision => 0 )} Bestellsumme solltest Du eine Aufgabe machen!
+  - if FoodsoftConfig[:stop_ordering_under].present?
+    Achtung, hast Du weniger als #{FoodsoftConfig[:stop_ordering_under]} Äpfel, darfst Du nicht mehr bestellen!

app/views/home/_stats.erb

@@ -1,27 +0,0 @@
-<%
-max_width = 600
-
-global_avg = Ordergroup.avg_jobs_per_euro
-group_avg = ordergroup.avg_jobs_per_euro.to_f
-
-unless global_avg == 0 or global_avg.nan?
-  length_of_global_bar = max_width / 2.0
-  length_of_group_bar = (group_avg / global_avg) * length_of_global_bar
-
-  length_of_group_bar = max_width if length_of_group_bar > max_width
-
-  color = group_avg >= global_avg ? "#78b74e" : "red"
-%>
-  Engagement Deiner Bestellgruppe
-  <div class="stats-bar" style="width:<%= length_of_group_bar -%>px; background-color:<%= color -%>">
-    <%= ordergroup.apples -%><%=  " Äpfel" if length_of_group_bar > 50 -%>
-  </div>
-  Durchschnittsengagement
-  <div class="stats-bar" style="width:<%= length_of_global_bar -%>px">
-    100 Birnen
-  </div>
-  <span class="description">
-    Abgebildet ist das Verhältnis von erledigten Aufgaben zu dem Bestellvolumen Deiner Bestellgruppe im Vergleich zum Durchschnitt in der Foodcoop.
-    Konkret: Pro <%= number_to_currency( (1/global_avg).round, :precision => 0 ) %> Bestellsumme solltest Du eine Aufgabe machen!
-  </span>
-<%- end -%>

app/views/home/index.html.haml

@@ -36,7 +36,7 @@
     .box_title
       %h2 Engagement Deiner Bestellgruppe
     .column_content
-      = render :partial => "stats", :locals => {:ordergroup => current_user.ordergroup}
+      = render :partial => "apple_bar", :locals => {:apple_bar => AppleBar.new(current_user.ordergroup)}
 
   - unless Message.public.empty?
     .box_title

app/views/shared/_open_orders.html.haml

@@ -1,6 +1,9 @@
 .box_title
   %h2 Laufende Bestellungen
 .column_content
+  - if ordergroup.not_enough_apples?
+    .warning
+      %p Achtung, Deine Bestellgruppe hat zu wenig Äpfel um Bestellen zu können!
   - unless Order.open.empty?
     %table.list
       %thead

config/app_config.yml.SAMPLE

@@ -38,6 +38,10 @@ default: &defaults
   # for total article price as long as the order is not finished.
   tolerance_is_costly: false
 
+  # Ordergroups, which have less than 75 apples should not be allowed to make new orders
+  # Comment out this option to activate this restriction
+  # stop_ordering_under: 75
+
   # email address to be used as sender
   email_sender: foodsoft@myfoodcoop.org
 

config/locales/de.yml

@@ -4,6 +4,12 @@ de:
   home:
     index:
       title: Startseite
+
+  group_orders:
+    messages:
+      not_enough_apples:
+        Um zu Bestellen brauchst Du mindestends %{stop_ordering_under} Äpfel.
+        Momentan hat Deine Bestellgruppe aber nur %{apples} Äpfel.
   date:
     abbr_day_names:
     - So

lib/apple_bar.rb

@@ -0,0 +1,48 @@
+class AppleBar
+
+  BAR_MAX_WITH = 600
+
+  def initialize(ordergroup)
+    @ordergroup = ordergroup
+    @group_avg = ordergroup.avg_jobs_per_euro.to_f
+    @global_avg = Ordergroup.avg_jobs_per_euro
+  end
+
+  def length_of_global_bar
+    BAR_MAX_WITH / 2.0
+  end
+
+  def length_of_group_bar
+    length = (@group_avg / @global_avg) * length_of_global_bar
+    length > BAR_MAX_WITH ? BAR_MAX_WITH : length
+  end
+
+  # Show group bar in following colors:
+  # Green if higher than 100
+  # Yellow if lower than 100 an higher than stop_ordering_under option value
+  # Red if below stop_ordering_under, the ordergroup isn't allowed to participate in an order anymore
+  def group_bar_color
+    if apples >= 100
+      "#78b74e"
+    else
+      if FoodsoftConfig[:stop_ordering_under].present? and
+          apples >= FoodsoftConfig[:stop_ordering_under]
+        'yellow'
+      else
+        'red'
+      end
+    end
+  end
+
+  def mean_order_amount_per_job
+    (1/@global_avg).round
+  end
+
+  def apples
+    @apples ||= @ordergroup.apples
+  end
+
+  def with_restriction?
+    FoodsoftConfig[:stop_ordering_under].present?
+  end
+end

public/stylesheets/main.css

@@ -96,6 +96,11 @@ option {
 .hidden {
   display: none; }
 
+.warning {
+  background: yellow;
+  font-weight: bold;
+  padding: 1px 10px; }
+
 #login {
   margin: auto;
   width: 35em;

public/stylesheets/sass/main.sass

@@ -104,6 +104,11 @@ option
 .hidden
   display: none
 
+.warning
+  background: yellow
+  font-weight: bold
+  padding: 1px 10px
+
 // ********************************* loginpage
 #login
   :margin auto