Big update.

 * Max acknowledgement time is now specified in the config
 * Calendar interface improved.
 * holiday_url no longer used -- replaced by notify_when_on_holiday!
 * added notify_when_off_sick!
 * Added ability for the calendar to be queried for a list of bank holdays.
 * Added ability for Time to be given a list of bank holidays to check against.
 * PeopleLists can now be a Proc, allowing downloading of lists
 * Person is no longer a struct
 * Moved the method_missing bit into ObjectBuilder from various sub classes.
 * Added tests for the calendar interface
 * Updated tests in other bits.

17 files changed, 381 insertions, 228 deletions

diff --git a/lib/mauve/alert.rb b/lib/mauve/alert.rb
index f249913..6b08f82 100644
--- a/lib/mauve/alert.rb
+++ b/lib/mauve/alert.rb
@@ -420,7 +420,7 @@ module Mauve
       #
       # Limit acknowledgment time.
       #
-      limit = Time.now + 15.days
+      limit = Time.now + Configuration.current.max_acknowledgement_time
       ack_until = limit if ack_until > limit
  
       self.acknowledged_by = person.username
diff --git a/lib/mauve/authentication.rb b/lib/mauve/authentication.rb
index c467a1d..24c6bd3 100644
--- a/lib/mauve/authentication.rb
+++ b/lib/mauve/authentication.rb
@@ -70,7 +70,7 @@ module Mauve
       unless true == result
         logger.info "Authentication for #{login} failed"
         # Rate limit
-        sleep Server.instance.failed_login_delay
+        sleep Configuration.current.failed_login_delay
       end
 
       result
@@ -97,15 +97,15 @@ module Mauve
       #
       # Don't bother checking if no auth_url has been set.
       #
-      return false unless Server.instance.bytemark_auth_url.is_a?(URI)
+      return false unless Configuration.current.bytemark_auth_url.is_a?(URI)
 
       #
       # Don't bother checking if the person doesn't exist.
       #
       return false unless Mauve::Configuration.current.people.has_key?(login)
 
-      uri     = Server.instance.bytemark_auth_url
-      timeout = Server.instance.remote_http_timeout
+      uri     = Configuration.current.bytemark_auth_url
+      timeout = Configuration.current.remote_http_timeout
       # host=nil, path=nil, port=nil, proxy_host=nil, proxy_port=nil, user=nil, password=nil, use_ssl=nil, timeout=nil)
       client  = XMLRPC::Client.new(uri.host, uri.path, uri.port, nil, nil, uri.user, uri.password, uri.scheme == "https", timeout)
 
@@ -114,7 +114,7 @@ module Mauve
       #
       if client.http.use_ssl?
         client.http.ca_path     = "/etc/ssl/certs/"
-        client.http.verify_mode = Server.instance.remote_https_verify_mode
+        client.http.verify_mode = Configuration.current.remote_https_verify_mode
       end
 
       begin
diff --git a/lib/mauve/calendar_interface.rb b/lib/mauve/calendar_interface.rb
index cf515d1..692981d 100644
--- a/lib/mauve/calendar_interface.rb
+++ b/lib/mauve/calendar_interface.rb
@@ -17,52 +17,58 @@ module Mauve
         @logger ||= Log4r::Logger.new(self.to_s)
       end
 
-      # Gets a list of ssologin on support.
+      def get_attendees(klass, at=Time.now)
+        #
+        # Returns nil if no calendar_url has been set.
+        #
+        return [] unless Configuration.current.bytemark_calendar_url
+  
+        url = Configuration.current.bytemark_calendar_url.dup
+
+        url.merge!(File.join(url.path, "/api/attendees/#{klass}/#{at.strftime("%Y-%m-%dT%H:%M:00")}"))
+        ans = do_get(url)
+
+        return [] unless ans.is_a?(Array)
+
+        ans.select{|x| x.is_a?(String)}
+      end
+
       #
-      # @param [String] url A Calendar API url.
+      # This should return a list of dates of forthcoming bank holidays
       #
-      # @return [Array] A list of all the usernames on support.
-      def get_users_on_support(url)
-        result = do_get_with_cache(url)
-
-        if result.is_a?(String)
-          result = result.split("\n")
-        else
-          result = []
-        end
+      def get_bank_holiday_list(at = Time.now)
+        return [] unless Configuration.current.bytemark_calendar_url
 
-        return result
+        url = Configuration.current.bytemark_calendar_url.dup
+        url.merge!(File.join(url.path, "/api/bank_holidays/#{at.strftime("%Y-%m-%d")}"))
+        ans = do_get(url)
+
+        return [] unless ans.is_a?(Array)
+        ans.select{|x| x.is_a?(Date)}
       end
 
-      # Check to see if the user is on support.
+      # Check to see if the user is on holiday.
       #
-      # @param [String] url A Calendar API url.
-      # @param [String] usr User single sign on.
+      # Class method.
       #
-      # @return [Boolean] True if on support, false otherwise.
-      def is_user_on_support?(url, usr)
-        return get_users_on_support(url).include?(usr)
+      # @param [String] usr User single sign on.
+      # 
+      # @return [Boolean] True if on holiday, false otherwise.
+      def is_user_on_holiday?(usr, at=Time.now)
+        get_attendees("staff_holiday").include?(usr)
       end
 
       # Check to see if the user is on holiday.
       #
       # Class method.
       #
-      # @param [String] url A Calendar API url.
       # @param [String] usr User single sign on.
       # 
       # @return [Boolean] True if on holiday, false otherwise.
-      def is_user_on_holiday?(url)
-        result = do_get_with_cache(url)
-
-        if result.is_a?(String) and result =~ /^\d{4}(-\d\d){2}[ T](\d\d:){2}\d\d/
-          return true
-        else
-          return false
-        end
+      def is_user_off_sick?(usr, at=Time.now)
+        get_attendees("sick_period", at).include?(usr)
       end
 
-    
       private
 
       # Grab a URL from the wide web.
@@ -74,7 +80,7 @@ module Mauve
       #
       def do_get (uri, limit = 11)
 
-        if 0 == limit
+        if 0 > limit
           logger.warn("HTTP redirect too deep for #{uri}.")
           return nil
         end
@@ -99,8 +105,22 @@ module Mauve
           response = http.start { http.get(uri.request_uri()) }
 
           if response.is_a?(Net::HTTPOK)
-            return response.body
+            #
+            # Parse the string as YAML.
+            #
+            result = if response.body.is_a?(String)
+              begin
+                YAML.load(response.body)
+              rescue YAML::Error => err
+                logger.error "Caught #{ex.class.to_s} (#{ex.to_s}) whilst querying #{url.to_s}."
+                logger.debug err.backtrace.join("\n")
+                nil
+              end
+            else
+              nil
+            end
 
+            return result
           elsif response.is_a?(Net::HTTPRedirection) and response.key?('Location')
             location = response['Location']
             
@@ -123,6 +143,7 @@ module Mauve
           logger.error("Timeout caught during fetch of #{uri.to_s}.")
 
         rescue StandardError => ex
+          pp ex.backtrace
           logger.error("#{ex.class} caught during fetch of #{uri.to_s}: #{ex.to_s}.")
           logger.debug(ex.backtrace.join("\n"))
 
@@ -140,10 +161,10 @@ module Mauve
       def do_get_with_cache(url, cache_until = Time.now + 5.minutes)
         @cache ||= {}
 
-        if @cache.has_key?(url.to_s)
-          result, cache_until = @cache[url.to_s]
+        if @cache.has_key?(url)
+          result, cached_until = @cache[url]
 
-          return result if cache_until >= Time.now and not result.nil?
+          return result if cached_until > Time.now and not result.nil?
         end
 
         result = do_get(url)
@@ -152,6 +173,19 @@ module Mauve
         return result
       end
 
+      #
+      # This should get called periodically.
+      #
+      def clean_cache
+
+        @cache.keys.select do |url|
+          result, cached_until = @cache[url]
+          @cache.delete(url) if !cached_until.is_a?(Time) or cached_until <= Time.now
+        end
+
+        @cache 
+      end
+
     end
 
   end
diff --git a/lib/mauve/configuration.rb b/lib/mauve/configuration.rb
index 65f5f71..3a8f9cc 100644
--- a/lib/mauve/configuration.rb
+++ b/lib/mauve/configuration.rb
@@ -40,6 +40,12 @@ module Mauve
     # @return [Hash]
     attr_reader   :source_lists
 
+    # Various further configuration items
+    #
+    attr_reader   :bytemark_auth_url, :bytemark_calendar_url, :remote_http_timeout, :remote_https_verify_mode, :failed_login_delay
+    attr_reader   :max_acknowledgement_time
+
+
     #
     # Set up a base config.
     #
@@ -50,7 +56,114 @@ module Mauve
       @people_lists = {}
       @source_lists = Hash.new{|h,k| h[k] = Mauve::SourceList.new(k)}
       @alert_groups = []
+
+      #
+      # Set the auth/calendar URLs
+      #
+      @bytemark_auth_url     = nil
+      @bytemark_calendar_url = nil
+
+      #
+      # Set a couple of params for remote HTTP requests.
+      #
+      @remote_http_timeout = 5
+      @remote_https_verify_mode = OpenSSL::SSL::VERIFY_PEER
+
+      #
+      # Rate limit login attempts to limit the success of brute-forcing.
+      #
+      @failed_login_delay = 1
+
+      #
+      # Maximum amount of time to acknowledge for
+      #
+      @max_acknowledgement_time = 15.days
+    end
+
+    # Set the calendar URL.
+    #
+    # @param [String] arg 
+    # @return [URI]
+    def bytemark_calendar_url=(arg)
+      raise ArgumentError, "bytemark_calendar_url must be a string" unless arg.is_a?(String)
+
+      @bytemark_calendar_url = URI.parse(arg)
+
+      #
+      # Make sure we get an HTTP URL.
+      #
+      raise ArgumentError, "bytemark_calendar_url must be an HTTP(S) URL." unless %w(http https).include?(@bytemark_calendar_url.scheme)
+
+      #
+      # Set a default request path, if none was given
+      #
+      @bytemark_calendar_url.normalize!
+
+      @bytemark_calendar_url
+    end
+
+    # Set the Bytemark Authentication URL
+    #
+    # @param [String] arg 
+    # @return [URI]
+    def bytemark_auth_url=(arg)
+      raise ArgumentError, "bytemark_auth_url must be a string" unless arg.is_a?(String)
+
+      @bytemark_auth_url = URI.parse(arg)
+      #
+      # Make sure we get an HTTP URL.
+      #
+      raise ArgumentError, "bytemark_auth_url must be an HTTP(S) URL." unless %w(http https).include?(@bytemark_auth_url.scheme)
+
+      #
+      # Set a default request path, if none was given
+      #
+      @bytemark_auth_url.normalize!
+
+      @bytemark_auth_url
+    end
+
+    # Sets the timeout when making remote HTTP requests
+    #
+    # @param [Integer] arg
+    # @return [Integer]
+    def remote_http_timeout=(arg)
+      raise ArgumentError, "remote_http_timeout must be an integer" unless s.is_a?(Integer)
+      @remote_http_timeout = arg
+    end
+
+    # Sets the SSL verification mode when makeing remote HTTPS requests
+    #
+    # @param [String] arg must be one of "none" or "peer"
+    # @return [Constant]
+    def remote_https_verify_mode=(arg)
+      @remote_https_verify_mode = case arg
+      when "peer"
+        OpenSSL::SSL::VERIFY_PEER
+      when "none"
+        OpenSSL::SSL::VERIFY_NONE
+      else
+        raise ArgumentError, "remote_https_verify_mode must be either 'peer' or 'none'"
+      end
+    end
+
+    # Set the delay added following a failed login attempt.
+    #
+    # @param [Numeric] arg Number of seconds to delay following a failed login attempt
+    # @return [Numeric]
+    #
+    def failed_login_delay=(arg)
+      raise ArgumentError, "failed_login_delay must be numeric" unless arg.is_a?(Numeric)
+      @failed_login_delay = arg
     end
     
+    # Set the maximum amount of time alerts can be ack'd for
+    #
+    #
+    def max_acknowledgement_time=(arg)
+      raise ArgumentError, "max_acknowledgement_time must be numeric" unless arg.is_a?(Numeric)
+      @max_acknowledgement_time = arg
+    end
+
   end
 end
diff --git a/lib/mauve/configuration_builder.rb b/lib/mauve/configuration_builder.rb
index 3f7138e..c689c1b 100644
--- a/lib/mauve/configuration_builder.rb
+++ b/lib/mauve/configuration_builder.rb
@@ -29,18 +29,6 @@ module Mauve
       @result.source_lists[label] += list
     end
 
-    # Adds a people list
-    #
-    # @param [String] label
-    # @param [Array]  list
-    #
-    # @return [Array] the whole people list for label
-    # ef people_list(label, *list)
-    #  _logger.warn("Duplicate people_list '#{label}'") if @result.people_lists.has_key?(label)
-    #  @result.people_lists[label] += list
-    # end
-
-
     # Have to use the method _logger here, cos logger is defined as a builder elsewhere.
     #
     # @return [Log4r::Logger]
diff --git a/lib/mauve/configuration_builders/notification_method.rb b/lib/mauve/configuration_builders/notification_method.rb
index 3f9283e..7951dee 100644
--- a/lib/mauve/configuration_builders/notification_method.rb
+++ b/lib/mauve/configuration_builders/notification_method.rb
@@ -40,18 +40,6 @@ module Mauve
         result.extend(Mauve::Notifiers::Debug)
       end
      
-      # This catches all methods available for a provider, as needed.
-      #
-      # Missing methods / bad arguments etc. are caught in the
-      # ObjectBuilder#parse method, via NoMethodError.
-      #
-      def method_missing(name, value=nil)
-        if value
-          result.send("#{name}=".to_sym, value)
-        else
-          result.send(name.to_sym)
-        end
-      end
     end
   end
 
diff --git a/lib/mauve/configuration_builders/person.rb b/lib/mauve/configuration_builders/person.rb
index dff6f85..7a20491 100644
--- a/lib/mauve/configuration_builders/person.rb
+++ b/lib/mauve/configuration_builders/person.rb
@@ -18,12 +18,14 @@ module Mauve
       is_block_attribute "urgent"
       is_block_attribute "normal"
       is_block_attribute "low"
+
       is_attribute "password"
       is_attribute "sms"
-      is_attribute "holiday_url"
       is_attribute "email"
       is_attribute "xmpp"
-      is_attribute "sms"
+
+      is_flag_attribute "notify_when_on_holiday!"
+      is_flag_attribute "notify_when_off_sick!"
      
       # Sets the block for all levels of alert
       #
diff --git a/lib/mauve/configuration_builders/server.rb b/lib/mauve/configuration_builders/server.rb
index d22ed87..734fb3b 100644
--- a/lib/mauve/configuration_builders/server.rb
+++ b/lib/mauve/configuration_builders/server.rb
@@ -171,31 +171,6 @@ module Mauve
       is_attribute "use_packet_buffer"
       is_attribute "use_notification_buffer"
   
-      #
-      # This is where the calendar is located.  The request paths are hard-coded.
-      #
-      is_attribute "bytemark_calendar_url" 
-
-      #
-      # This is where the Bytemark authentication server is located.
-      #
-      is_attribute "bytemark_auth_url"
-
-      #
-      # This is the level of SSL verification used when making external HTTPS connections.
-      #
-      is_attribute "remote_https_verify_mode"
-      
-      #
-      # This is the default timeout when making remote HTTP requests
-      #
-      is_attribute "remote_http_timeout"
-
-      #
-      # This is the default sleep time after an authentication attempt has failed. 
-      #
-      is_attribute "failed_login_delay"
-
       def builder_setup
         @result = Mauve::Server.instance
       end
diff --git a/lib/mauve/mauve_time.rb b/lib/mauve/mauve_time.rb
index f564fdb..dfbf99b 100644
--- a/lib/mauve/mauve_time.rb
+++ b/lib/mauve/mauve_time.rb
@@ -98,12 +98,37 @@ class Time
     t
   end
 
+  # Returns the bank_holidays array, or an empty array if bank_holidays hasn't
+  # been set.
+  #
+  #
+  def bank_holidays
+    @bank_holidays ||= []
+  end
+
+  # This sets the bank holiday dates for the bank_holiday? check.
+  #
+  # @param [Array] arg An array of Date of bank holidays
+  # @returns [Array]
+  #
+  def bank_holidays=(arg)
+    raise ArgumentError unless arg.is_a?(Array) and arg.all?{|a| a.is_a?(Date)}
+    @bank_holidays = arg
+  end
+
+  # This relies on bank_holidays being set.
+  #
+  def bank_holiday?
+    today = Date.new(self.year, self.month, self.day)
+    self.bank_holidays.any?{|bh| bh == today}
+  end
+
   # Test to see if we're in working hours. The working day is from 8.30am until
   # 17:00
   #
   # @return [Boolean]
   def working_hours?
-    (1..5).include?(self.wday) and ((9..16).include?(self.hour) or  (self.hour == 8 && self.min >= 30))
+    !bank_holiday? and (1..5).include?(self.wday) and ((9..16).include?(self.hour) or  (self.hour == 8 && self.min >= 30))
   end
 
   # Test to see if it is currently daytime.  The daytime day is 14 hours long
@@ -113,7 +138,6 @@ class Time
     (8..21).include?(self.hour)
   end
   
-  
   # We're always in wallclock hours
   #
   # @return [true]
diff --git a/lib/mauve/notification.rb b/lib/mauve/notification.rb
index d06e03a..5877e0f 100644
--- a/lib/mauve/notification.rb
+++ b/lib/mauve/notification.rb
@@ -163,8 +163,9 @@ module Mauve
     # Test to see if we're in working hours.  See Time#working_hours?
     #
     # @return [Boolean]
-    def working_hours? 
+    def working_hours?
       @test_time = @time if @test_time.nil?
+      @test_time.bank_holidays = Server.instance.bank_holidays
       @test_time.working_hours?
     end
 
diff --git a/lib/mauve/notifiers/xmpp.rb b/lib/mauve/notifiers/xmpp.rb
index a0ad86e..b291442 100644
--- a/lib/mauve/notifiers/xmpp.rb
+++ b/lib/mauve/notifiers/xmpp.rb
@@ -604,7 +604,10 @@ EOF
           end
 
           begin
-            ack_until = Time.now.in_x_hours(n_hours, type_hours)
+            now = Time.now
+            now.bank_holidays = Server.instance.bank_holidays
+
+            ack_until = now.in_x_hours(n_hours, type_hours)
           rescue RangeError 
             return "I'm sorry, you tried to acknowedge for far too long, and my buffers overflowed!"
           end
diff --git a/lib/mauve/people_list.rb b/lib/mauve/people_list.rb
index eab4ae3..0433034 100644
--- a/lib/mauve/people_list.rb
+++ b/lib/mauve/people_list.rb
@@ -35,6 +35,8 @@ module Mauve
           arr = arr.flatten
         when String
           arr = [arr]
+        when Proc
+          arr = [arr]
         else
           logger.warn "Not sure what to do with #{arr.inspect} -- converting to string, and continuing"
           arr = [arr.to_s]
@@ -62,10 +64,12 @@ module Mauve
     #
     # @return [Array]
     def people
-
       l = list.collect do |name|
-        Configuration.current.people.has_key?(name) ? Configuration.current.people[name] : nil
-      end.reject{|person| person.nil?}
+        name.is_a?(Proc) ? name.call : name 
+      end.flatten.compact.uniq.collect do |name|
+        Configuration.current.people[name] 
+      end.compact
+
       #
       # Hmm.. no-one in the list?!
       #
diff --git a/lib/mauve/person.rb b/lib/mauve/person.rb
index 1cf4ea0..929f511 100644
--- a/lib/mauve/person.rb
+++ b/lib/mauve/person.rb
@@ -3,23 +3,15 @@ require 'timeout'
 require 'log4r'
 
 module Mauve
-  class Person < Struct.new(:username, :password, :urgent, :normal, :low, :email, :xmpp, :sms)
+  class Person 
   
+    attr_reader :username, :password, :urgent, :normal, :low, :email, :xmpp, :sms
     attr_reader :notification_thresholds, :last_pop3_login, :suppressed, :notifications
- 
+    attr_reader :notify_when_off_sick, :notify_when_on_holiday
+
     # Set up a new Person
     #
-    # @param [Hash] args The options for setting up the person
-    #   @option args [String] :username The person's username
-    #   @option args [String] :password The SHA1 sum of the person's password
-    #   @option args [String] :holiday_url The URL that can be checked by Mauve::CalendarInterface#is_user_on_holiday?
-    #   @option args [Proc] :urgent The block to execute when an urgent-level notification is issued
-    #   @option args [Proc] :normal The block to execute when an normal-level notification is issued
-    #   @option args [Proc] :low The block to execute when an low-level notification is issued
-    #   @option args [String] :email The person's email address
-    #   @option args [String] :sms The person's mobile number
-    # 
-    def initialize(*args)
+    def initialize(username)
       @notification_thresholds = nil
       @suppressed = false
       #
@@ -28,9 +20,85 @@ module Mauve
       @last_pop3_login = {:from => nil, :at => nil}
       @notifications = []
 
-      super(*args)
-    end
+      @username = username
+      @password = nil
+      @urgent   = lambda { false }
+      @normal   = lambda { false }
+      @low      = lambda { false }
+      @email    = @sms = @xmpp = nil
    
+      @notify_when_on_holiday = @notify_when_off_sick = false 
+    end
+  
+    # Determines if a user should be notified if they're ill.
+    #
+    # @return [Boolean]
+    #
+    def notify_when_off_sick!
+      @notify_when_off_sick = true
+    end
+
+    # Determines if a user should be notified if they're on their holdiays.
+    #
+    # @return [Boolean]
+    #
+    def notify_when_on_holiday!
+      @notify_when_on_holiday = true
+    end
+
+    # Sets the Proc to call for urgent notifications
+    #
+    def urgent=(block)
+      raise ArgumentError unless block.is_a?(Proc)
+      @urgent = block
+    end
+ 
+    # Sets the Proc to call for normal notifications
+    #
+    def normal=(block)
+      raise ArgumentError unless block.is_a?(Proc)
+      @normal = block
+    end
+    
+    # Sets the Proc to call for low notifications
+    #
+    def low=(block)
+      raise ArgumentError unless block.is_a?(Proc)
+      @low = block
+    end
+
+    # Sets the email parameter
+    #
+    #
+    def email=(arg)
+      raise ArgumentError unless arg.is_a?(String)
+      @email = arg
+    end
+
+    # Sets the sms parameter
+    #
+    #
+    def sms=(arg)
+      raise ArgumentError unless arg.is_a?(String)
+      @sms = arg
+    end
+
+    # Sets the xmpp parameter
+    #
+    #
+    def xmpp=(arg)
+      raise ArgumentError unless arg.is_a?(String)
+      @xmpp = arg
+    end
+
+    # Sets the password parameter
+    #
+    #
+    def password=(arg)
+      raise ArgumentError unless arg.is_a?(String)
+      @password=arg
+    end
+
     # @return Log4r::Logger
     def logger ; @logger ||= Log4r::Logger.new self.class.to_s ; end
 
@@ -39,8 +107,6 @@ module Mauve
     # @return [Boolean]
     def suppressed? ; @suppressed ; end
 
-    def holiday_url ; nil ; end
- 
     # Works out if a notification should be suppressed.  If no parameters are supplied, it will 
     #
     # @param [Time] Theoretical time of notification
@@ -155,8 +221,7 @@ module Mauve
     # @param [Mauve::Alert] alert Alert we're notifiying about
     #
     # @return [Boolean] if the notification was successful
-    def send_alert(level, alert)
-      now = Time.now
+    def send_alert(level, alert, now=Time.now)
 
       was_suppressed = @suppressed
       @suppressed    = self.should_suppress?
@@ -168,7 +233,7 @@ module Mauve
       # We only suppress notifications if we were suppressed before we started,
       # and are still suppressed.
       #
-      if @suppressed or self.is_on_holiday?
+      if @suppressed or self.is_on_holiday?(now) or self.is_off_sick?(now)
         note =  "#{alert.update_type.capitalize} notification to #{self.username} suppressed"
         logger.info note + " about #{alert}."
         History.create(:alerts => [alert], :type => "notification", :event => note)
@@ -217,20 +282,19 @@ module Mauve
       end
     end
 
-    #
-    # 
-    #
-    def alert_during
-
-    end    
-
     # Whether the person is on holiday or not.
     #
     # @return [Boolean] True if person on holiday, false otherwise.
-    def is_on_holiday? ()
-      return false if holiday_url.nil? or holiday_url.empty?
+    def is_on_holiday?(at=Time.now)
+      return false if self.notify_when_on_holiday
+
+      return CalendarInterface.is_user_on_holiday?(self.username, at)
+    end
+
+    def is_off_sick?(at=Time.now)
+      return false if self.notify_when_off_sick
 
-      return CalendarInterface.is_user_on_holiday?(holiday_url)
+      return CalendarInterface.is_user_off_sick?(self.username, at)
     end
 
   end
diff --git a/lib/mauve/processor.rb b/lib/mauve/processor.rb
index 0ac7b59..acf72b3 100644
--- a/lib/mauve/processor.rb
+++ b/lib/mauve/processor.rb
@@ -57,14 +57,11 @@ module Mauve
 
       to_delete = []
 
-      @transmission_id_cache.each do |tid, received_at|
-        to_delete << tid if (now - received_at) > @transmission_cache_expire_time
+      @transmission_id_cache = @transmission_id_cache.delete_if do |cache_data|
+        tid, received_at = cache_data
+        (now - received_at) > @transmission_cache_expire_time
       end
 
-      to_delete.each do |tid|
-        @transmission_id_cache.delete(tid)
-      end
-      
       @transmission_cache_checked_at = now
     end
 
@@ -197,6 +194,11 @@ module Mauve
       sz.times do
         process_packet(*Server.packet_pop)
       end
+
+      #
+      # Now expire the cache.  This will only get processed at most once every minute.
+      #
+      expire_transmission_id_cache
     end
 
     def timer_should_stop?
diff --git a/lib/mauve/server.rb b/lib/mauve/server.rb
index 2b0e101..366191c 100644
--- a/lib/mauve/server.rb
+++ b/lib/mauve/server.rb
@@ -50,21 +50,10 @@ module Mauve
       @notification_buffer = []
 
       #
-      # Set the auth/calendar URLs
+      # Bank Holidays -- this list is kept here, because I can't think of
+      # anywhere else to put it.
       #
-      @bytemark_auth_url     = nil
-      @bytemark_calendar_url = nil
-
-      #
-      # Set a couple of params for remote HTTP requests.
-      #
-      @remote_http_timeout = 5
-      @remote_https_verify_mode = OpenSSL::SSL::VERIFY_PEER
-
-      #
-      # Rate limit login attempts to limit the success of brute-forcing.
-      #
-      @failed_login_delay = 1
+      @bank_holidays = nil 
 
       #
       # Set up a blank config.
@@ -114,83 +103,6 @@ module Mauve
       @notification_buffer
     end
 
-    # Set the calendar URL.
-    #
-    # @param [String] arg 
-    # @return [URI]
-    def bytemark_calendar_url=(arg)
-      raise ArgumentError, "bytemark_calendar_url must be a string" unless arg.is_a?(String)
-
-      @bytemark_calendar_url = URI.parse(arg)
-
-      #
-      # Make sure we get an HTTP URL.
-      #
-      raise ArgumentError, "bytemark_calendar_url must be an HTTP(S) URL." unless %w(http https).include?(@bytemark_calendar_url.scheme)
-
-      #
-      # Set a default request path, if none was given
-      #
-      @bytemark_calendar_url.path="/" if @bytemark_calendar_url.path.empty?
-
-      @bytemark_calendar_url
-    end
-
-    # Set the Bytemark Authentication URL
-    #
-    # @param [String] arg 
-    # @return [URI]
-    def bytemark_auth_url=(arg)
-      raise ArgumentError, "bytemark_auth_url must be a string" unless arg.is_a?(String)
-
-      @bytemark_auth_url = URI.parse(arg)
-      #
-      # Make sure we get an HTTP URL.
-      #
-      raise ArgumentError, "bytemark_auth_url must be an HTTP(S) URL." unless %w(http https).include?(@bytemark_auth_url.scheme)
-
-      #
-      # Set a default request path, if none was given
-      #
-      @bytemark_auth_url.path="/" if @bytemark_auth_url.path.empty?
-
-      @bytemark_auth_url 
-    end
-
-    # Sets the timeout when making remote HTTP requests
-    #
-    # @param [Integer] arg
-    # @return [Integer]
-    def remote_http_timeout=(arg)
-      raise ArgumentError, "initial_sleep must be an integer" unless s.is_a?(Integer)
-      @remote_http_timeout = arg
-    end
-
-    # Sets the SSL verification mode when makeing remote HTTPS requests
-    #
-    # @param [String] arg must be one of "none" or "peer"
-    # @return [Constant]
-    def remote_https_verify_mode=(arg)
-      @remote_https_verify_mode = case arg
-      when "peer" 
-        OpenSSL::SSL::VERIFY_PEER
-      when "none" 
-        OpenSSL::SSL::VERIFY_NONE
-      else
-        raise ArgumentError, "remote_https_verify_mode must be either 'peer' or 'none'"
-      end
-    end
-
-    # Set the delay added following a failed login attempt.
-    #
-    # @param [Numeric] arg Number of seconds to delay following a failed login attempt
-    # @return [Numeric]
-    #
-    def failed_login_delay=(arg)
-      raise ArgumentError, "initial_sleep must be numeric" unless arg.is_a?(Numeric)
-      @failed_login_delay = arg
-    end
-
     # Set the sleep period during which notifications about old alerts are
     # suppressed.
     #
@@ -207,6 +119,24 @@ module Mauve
       Time.now < self.started_at + self.initial_sleep
     end
 
+    # Check with the calendar for the list of bank holidays
+    #
+    #
+    def bank_holidays
+      #
+      # Update the bank holidays list hourly.
+      #
+      if @bank_holidays.nil? or
+         @bank_holidays_last_checked_at.nil? or
+         @bank_holidays_last_checked_at < (Time.now - 1.hour)
+
+        @bank_holidays = CalendarInterface.get_bank_holiday_list(Time.now)
+        @bank_holidays_last_checked_at = Time.now
+      end
+
+      @bank_holidays
+    end
+
     # return [Log4r::Logger]
     def logger
       @logger ||= Log4r::Logger.new(self.class.to_s)
diff --git a/lib/mauve/web_interface.rb b/lib/mauve/web_interface.rb
index 16e7da2..a8e1ece 100644
--- a/lib/mauve/web_interface.rb
+++ b/lib/mauve/web_interface.rb
@@ -218,9 +218,13 @@ EOF
       note       = params[:note]       || nil
 
       n_hours = (n_hours.to_f > 188 ? 188 : n_hours.to_f)
+      type_hours = "daytime" unless %w(daytime working wallclock).include?(type_hours)
 
       if ack_until.to_s.empty?
-        ack_until = Time.now.in_x_hours(n_hours, type_hours.to_s)
+        now = Time.now
+        now.bank_holidays = Server.instance.bank_holidays
+
+        ack_until = now.in_x_hours(n_hours, type_hours.to_s)
       else
         ack_until = Time.at(ack_until.to_i)
       end
@@ -275,12 +279,14 @@ EOF
       #
       n_hours    = ( n_hours > 300 ? 300 : n_hours )
       type_hours = "daytime" unless %w(daytime working wallclock).include?(type_hours)
-      ack_until = Time.now.in_x_hours(n_hours, type_hours)
+      now = Time.now
+      now.bank_holidays = Server.instance.bank_holidays
+      ack_until = now.in_x_hours(n_hours, type_hours)
       
       #
       # Make sure we can't ack longer than a week.
       #
-      max_ack   = (Time.now + 86400*8)
+      max_ack   = (Time.now + Configuration.current.max_acknowledgement_time) 
       ack_until = max_ack if ack_until > max_ack
 
       #
@@ -359,8 +365,13 @@ EOF
       type_hours = params[:type_hours].to_s
       note       = params[:note]       || nil
       
+      type_hours = "daytime" unless %w(daytime working wallclock).include?(type_hours)
+
       if ack_until == 0
-        ack_until = Time.now.in_x_hours(n_hours, type_hours)
+        now = Time.now
+        now.bank_holidays = Server.instance.bank_holidays
+
+        ack_until = now.in_x_hours(n_hours, type_hours)
       else
         ack_until = Time.at(ack_until)
       end
diff --git a/lib/object_builder.rb b/lib/object_builder.rb
index ebd655b..ccb2c63 100644
--- a/lib/object_builder.rb
+++ b/lib/object_builder.rb
@@ -181,6 +181,20 @@ class ObjectBuilder
     end
   end
 
+  # This catches all methods available for a provider, as needed.
+  #
+  # Missing methods / bad arguments etc. are caught in the
+  # ObjectBuilder#parse method, via NoMethodError.
+  #
+  def method_missing(name, value=nil)
+    if value
+      result.send("#{name}=".to_sym, value)
+    else
+      result.send(name.to_sym)
+    end
+  end
+
+
   class << self
 
     # Defines a new builder