aboutsummaryrefslogtreecommitdiff
path: root/lib/mauve/alert_changed.rb
blob: 4668fd77fb49236f346b4a7a004897f844728f6e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
# 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

##    def initialize
#     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
      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
        
        alert_group.notifications.each do |notification|
          notification.people.each do |person|
            if person.username == self.person
              person.remind(alert, level)
              self.remind_at = notification.remind_at_next(alert)
              save
              saved = true
            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