[api] do not crash when a request has MANY actions

Limiting notification payload to 50 for now

src/api/app/models/bs_request.rb

@@ -714,6 +714,8 @@ def send_state_change
     Event::RequestStatechange.create(self.notify_parameters)
   end
 
+  ActionNotifyLimit=50
+
   def notify_parameters(ret = {})
     ret[:id] = self.id
     ret[:description] = self.description
@@ -726,15 +728,15 @@ def notify_parameters(ret = {})
 
     # Use a nested data structure to support multiple actions in one request
     ret[:actions] = []
-    self.bs_request_actions.each do |a|
+    self.bs_request_actions[0..ActionNotifyLimit].each do |a|
       ret[:actions] << a.notify_params
     end
     ret
   end
 
   def self.actions_summary(payload)
     ret = []
-    payload.with_indifferent_access['actions'].each do |a|
+    payload.with_indifferent_access['actions'][0..ActionNotifyLimit].each do |a|
       str = "#{a['type']} #{a['targetproject']}"
       str += "/#{a['targetpackage']}" if a['targetpackage']
       str += "/#{a['targetrepository']}" if a['targetrepository']

src/api/app/models/event/request.rb

@@ -3,6 +3,8 @@ class Event::Request < ::Event::Base
   self.abstract_class = true
   payload_keys :author, :comment, :description, :id, :actions, :state, :when, :who
 
+  DiffLimit = 120
+
   def self.message_id(id)
     "<obs-request-#{id}@#{message_domain}>"
   end
@@ -68,8 +70,6 @@ def calculate_diff(a)
     end
   end
 
-  DiffLimit = 120
-
   def payload_with_diff
     ret = payload
     payload['actions'].each do |a|

src/api/test/functional/request_events_test.rb

@@ -36,6 +36,31 @@ def verify_email(fixture_name, myid, email)
     verify_email('request_event', myid, email)
   end
 
+  test 'very_large_request_event' do
+    login_Iggy
+
+    Timecop.travel(2013, 8, 20, 12, 0, 0)
+    myid = 0
+    assert_difference 'ActionMailer::Base.deliveries.size', +1 do
+      body = "<request>\n"
+      actions=1000
+      actions.times do |t|
+        body += "<action type='add_role'><target project='home:tom'/><person name='Iggy' role='reviewer'/></action>\n"
+      end
+      body += "</request>"
+      raw_post '/request?cmd=create', body
+      assert_response :success
+      req = Xmlhash.parse(@response.body)
+      assert_equal actions, req['action'].count
+      myid = req['id']
+    end
+
+    email = ActionMailer::Base.deliveries.last
+
+    assert_match(/^Request #{myid} created by Iggy \(add_role home:tom, /, email.subject)
+    assert_equal %w(tschmidt@example.com), email.to # tom is maintainer
+  end
+
   test 'set_bugowner event' do
     login_Iggy