Add foodsoft expansion variables for wiki

lib/foodsoft/expansion_variables.rb

@@ -0,0 +1,87 @@
+module Foodsoft
+  # Variable expansions for user-specified texts.
+  #
+  # This is used in wiki-pages and the footer, for example, to allow foodcoops
+  # to show dynamic information in the text.
+  #
+  # Plugins can modify the variables by means of the `#variables` accessor.
+  # Please be thoughful when choosing names as to avoid collisions.
+  # Do not put non-public info in variables.
+  module ExpansionVariables
+
+    ACTIVE_MONTHS = 3
+
+    # @return [Hash] Variables and their values
+    cattr_accessor :variables
+
+    # Hash of variables. Note that keys are Strings.
+    @@variables = {
+      'scope'                   => ->{ FoodsoftConfig.scope },
+      'name'                    => ->{ FoodsoftConfig[:name] },
+      'contact.street'          => ->{ FoodsoftConfig[:contact][:street] },
+      'contact.zip_code'        => ->{ FoodsoftConfig[:contact][:zip_code] },
+      'contact.city'            => ->{ FoodsoftConfig[:contact][:city] },
+      'contact.country'         => ->{ FoodsoftConfig[:contact][:country] },
+      'contact.email'           => ->{ FoodsoftConfig[:contact][:email] },
+      'contact.phone'           => ->{ FoodsoftConfig[:contact][:phone] },
+      'price_markup'            => ->{ FoodsoftConfig[:price_markup] },
+      'homepage'                => ->{ FoodsoftConfig[:homepage] },
+
+      'help_url'                => ->{ FoodsoftConfig[:help_url] },
+      'applepear_url'           => ->{ FoodsoftConfig[:applepear_url] },
+
+      'foodsoft.url'            => ->{ FoodsoftConfig[:foodsoft_url] },
+      'foodsoft.version'        => Foodsoft::VERSION,
+      'foodsoft.revision'       => Foodsoft::REVISION,
+
+      'user_count'              => ->{ User.count },
+      'ordergroup_count'        => ->{ Ordergroup.undeleted.count },
+      'active_ordergroup_count' => ->{ active_ordergroup_count },
+      'supplier_count'          => ->{ Supplier.undeleted.count },
+      'active_supplier_count'   => ->{ active_supplier_count },
+      'active_suppliers'        => ->{ active_suppliers },
+      'first_order_date'        => ->{ I18n.l Order.first.created_at.to_date }
+    }
+
+    # Return expanded variable
+    # @return [String] Expanded variable
+    def self.get(var)
+      s = @@variables[var.to_s]
+      s.respond_to?(:call) ? s.call : s.to_s
+    end
+
+    # Expand variables in a string
+    # @param str [String] String to expand variables in
+    # @param options [Hash<String, String>] Extra variables to expand
+    # @return [String] Expanded string
+    def self.expand(str, options = {})
+      str.gsub /{{([._a-zA-Z0-9]+)}}/ do
+        options[$1] || self.get($1)
+      end
+    end
+
+
+    # @return [Number] Number of ordergroups that have been active in the past 3 months
+    def self.active_ordergroup_count
+      GroupOrder
+        .where('updated_on > ?', ACTIVE_MONTHS.months.ago)
+        .select(:ordergroup_id).distinct.count
+    end
+
+    # @return [Number] Number of suppliers that has been ordered from in the past 3 months
+    def self.active_supplier_count
+      Order
+        .where('starts > ?', ACTIVE_MONTHS.months.ago)
+        .select(:supplier_id).distinct.count
+    end
+
+    # @return [String] Comma-separated list of suppliers that has been ordered from in the past 3 months
+    def self.active_suppliers
+      Supplier.joins(:orders)
+        .where('orders.starts > ?', ACTIVE_MONTHS.months.ago)
+        .order(:name).select(:name).distinct
+        .map(&:name).join(', ')
+    end
+
+  end
+end

plugins/wiki/lib/foodsoft_wiki/wiki_parser.rb

@@ -1,6 +1,10 @@
 module FoodsoftWiki
   class WikiParser < WikiCloth::Parser
 
+    template do |template|
+      Foodsoft::ExpansionVariables.get(template)
+    end
+
     url_for do |page|
       url_for page
     end