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# encoding: UTF-8
require 'mauve/datamapper'
require 'log4r'
module Mauve
class AlertChanged
include DataMapper::Resource
# so .first always returns the most recent update
default_scope(:default).update(:order => [:at.desc, :id.desc])
property :id, Serial
property :alert_id, Integer, :required => true
property :person, String, :required => true
property :at, DateTime, :required => true
property :was_relevant, Boolean, :required => true, :default => true
property :level, String, :required => true
property :update_type, String, :required => true
property :remind_at, DateTime
property :updated_at, DateTime
def to_s
"#<AlertChanged:#{id} of #{alert_id} for #{person} update_type #{update_type}>"
end
belongs_to :alert
# There is a bug there. You could have two reminders for the same
# person if that person has two different notify clauses.
#
# See the test cases test_Bug_reminders_get_trashed() in ./test/
after :create do
old_changed = AlertChanged.first(
:alert_id => alert_id,
:person => person,
:id.not => id,
:remind_at.not => nil
)
if old_changed
if !old_changed.update(:remind_at => nil)
logger.error "Couldn't save #{old_changed}, will get duplicate reminders"
end
end
end
def was_relevant=(value)
attribute_set(:was_relevant, value)
end
def logger
Log4r::Logger.new self.class.to_s
end
## Checks to see if a raise was send to the person.
#
# @TODO: Recurence is broken in ruby, change this so that it does not
# use it.
#
# @author Matthew Bloch
# @return [Boolean] true if it was relevant, false otherwise.
def was_relevant_when_raised?
if :acknowledged == update_type.to_sym and true == was_relevant
return true
end
return was_relevant if update_type.to_sym == :raised
previous = AlertChanged.first(:id.lt => id,
:alert_id => alert_id,
:person => person)
if previous
previous.was_relevant_when_raised?
else
# a bug, but hardly inconceivable :)
logger.warn("Could not see that #{alert} was raised with #{person} "+
"but further updates exist (e.g. #{self}) "+
"- you may see spurious notifications as a result")
true
end
end
# Sends a reminder about this alert state change, or forget about it if
# the alert has been acknowledged
#
def remind
unless alert.is_a?(Alert)
logger.debug "#{self.inspect} lost alert #{alert_id}. Killing self."
destroy!
return false
end
logger.debug "Reminding someone about #{self.inspect}"
alert_group = AlertGroup.matches(alert)[0]
if !alert_group || alert.acknowledged?
logger.debug((alert_group ?
"Alert already acknowledged" :
"No alert group matches any more"
) + ", no reminder due"
)
self.remind_at = nil
save
else
saved = false
unless alert_group.notifications.nil?
alert_group.notifications.each do |notification|
notification.people.each do |person|
# Not interested in nil people.
next if person.nil?
if person.username == self.person
person.remind(alert, level)
self.remind_at = notification.remind_at_next(alert)
save
saved = true
end
end
end
end
if !saved
logger.warn("#{self.inspect} did not match any people, maybe configuration has changed but I'm going to delete this and not try to remind anyone again")
destroy!
end
end
end
def due_at # mimic interface from Alert
remind_at ? remind_at.to_time : nil
end
def poll # mimic interface from Alert
remind if remind_at.to_time <= MauveTime.now
end
class << self
def next_reminder
first(:remind_at.not => nil, :order => [:remind_at])
end
def find_next_with_event # mimic interface from Alert
next_reminder
end
def all_overdue(at = MauveTime.now)
all(:remind_at.not => nil, :remind_at.lt => at, :order => [:remind_at]).to_a
end
end
end
end
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