Allow registering events to timelines using regexes

Up until now, in order to register event type to the timeline, we
needed to list all of the event types in settings yaml.

This commit adds another option: specify event type to group/level
mapping using regular expressions, which should make mapping
definitions much shorter for providers with many different event types
that follow a certain pattern.

Changes were made in to areas: in database querying and in event to
category assignment.

When creating database condition for events, we now use three sources:

 1. a set of event types that should be included in result,
 2. a set of event types that should not be present in result and
 3. a set of regular expressions that event types can match.

An event is part of the result if its type is in include set or
matches any of the regular expressions and is not part of the exclude
set. For example, take this fragment of settings file:

    :ems:
      :ems_dummy:
        :event_handling:
          :event_groups:
            :addition:
              :critical:
              - !ruby/regexp /^dummy_add_.+$/
            :update:
              :critical:
              - dummy_123_update
              - !ruby/regexp /^dummy_.+_update$/i
              :detail:
              - dummy_abc_update
              - dummy_def_update
              - !ruby/regexp /^dummy_detail_.+_update$/

This translates into following three sources for :update category,
assuming user selected :critical level in UI:

  * include_set: dummy_123_update
  * exclude_set: dummy_abc_update, dummy_def_update
  * regexes: ^dummy_.+_updates$

In this case, events of type dummy_abc_update will not be displayed,
since they match details and are thus put in exclude set. On the
other hand, if the user selected :critical and :detail levels, things
are a bit different:

  * include_set: dummy_123_update, dummy_abc_update, dummy_def_update
  * exclude_set:
  * regexes: ^dummy_.+_updates$, ^dummy_detail_.+_update$

Regular expressions should be accepted by the PostreSQL DBMS and
should not contain Ruby-specific functionality. The only exception to
this rule is case sensitivity, which can make regular expressions a lot
simpler in certain situations.

Category assignment is done in two phases. First, we try to assign
category only looking at the full name of event. If this yields no
category, we try to assign one by matching against regular
expressions. If we continue with categories from example above, we
would get those mappings:

  * dummy_123_update is mapped to :update. It also matches :addition
    category, but since explicit names have higher priority, that
    regular expression is not checked at all.
  * dummy_nil_update is mapped to :update because it matches one of
    the :critical expressions.
  * dummy_add_event is mapped to :addition.

All this is done in order to give fully spelled-out event type
mappings higher priority than regular expression ones and to be
consistent with how EventStream classifies events into groups and
levels.

app/controllers/application_controller/timelines.rb

@@ -117,9 +117,36 @@ def tl_build_timeline_report_options
   end
 
   def tl_add_event_type_conditions(conditions, parameters)
-    unless @tl_options.event_set.empty?
-      conditions << "event_type in (?)"
-      parameters << @tl_options.event_set.flatten
+    tl_add_event_type_inclusions(conditions, parameters)
+    tl_add_event_type_exclusions(conditions, parameters)
+  end
+
+  def tl_add_event_type_inclusions(conditions, parameters)
+    expressions = []
+    @tl_options.get_set(:regexes).each do |regex|
+      expressions << tl_get_regex_sql_expression(regex)
+      parameters << regex.source
+    end
+
+    includes = @tl_options.get_set(:include_set)
+    unless includes.empty?
+      expressions << "event_type in (?)"
+      parameters << includes
+    end
+
+    condition = expressions.join(") or (")
+    conditions << "(#{condition})" unless condition.empty?
+  end
+
+  def tl_get_regex_sql_expression(regex)
+    regex.casefold? ? "event_type ~* ?" : "event_type ~ ?"
+  end
+
+  def tl_add_event_type_exclusions(conditions, parameters)
+    excludes = @tl_options.get_set(:exclude_set)
+    unless excludes.empty?
+      conditions << "event_type not in (?)"
+      parameters << excludes
     end
   end
 

app/controllers/application_controller/timelines/options.rb

@@ -36,16 +36,28 @@ def update_start_end(sdate, edate)
     def update_from_params(params)
       self.levels = params[:tl_levels]&.map(&:to_sym) || group_levels
       self.categories = {}
-      if params[:tl_categories]
-        params[:tl_categories].each do |category|
-          event_group = event_groups[events[category]].clone
-          next unless event_group.keys.include_any?(levels)
-          categories[events[category]] = {:display_name => category}
-          unless levels.include_all?(event_group.keys)
-            event_group.delete_if { |key, _v| !levels.include?(key) }
+      params.fetch(:tl_categories, []).each do |category_display_name|
+        group_data = event_groups[events[category_display_name]]
+        category = {
+          :display_name => category_display_name,
+          :include_set  => [],
+          :exclude_set  => [],
+          :regexes      => []
+        }
+
+        group_levels.each do |lvl|
+          next unless group_data[lvl]
+          strings, regexes = group_data[lvl].partition { |typ| typ.kind_of?(String) }
+          if levels.include?(lvl)
+            category[:include_set].push(*strings)
+            category[:regexes].push(*regexes)
+          else
+            category[:exclude_set].push(*strings)
           end
-          categories[events[category]][:event_groups] = event_group.values.flatten
         end
+        next if category[:include_set].empty? && category[:regexes].empty?
+
+        categories[events[category_display_name]] = category
       end
     end
 
@@ -56,14 +68,6 @@ def events
       end
     end
 
-    def event_set
-      event_set = []
-      categories.each do |category|
-        event_set.push(category.last[:event_groups])
-      end
-      event_set
-    end
-
     def drop_cache
       @events = @event_groups = @lvl_text_value = nil
     end
@@ -90,10 +94,13 @@ def group_levels
     def update_from_params(params)
       self.result = params[:tl_result] || "success"
       self.categories = {}
-      if params[:tl_categories]
-        params[:tl_categories].each do |category|
-          categories[category] = {:display_name => category, :event_groups => events[category]}
-        end
+      params.fetch(:tl_categories, []).each do |category|
+        categories[category] = {
+          :display_name => category,
+          :include_set  => events[category],
+          :exclude_set  => [],
+          :regexes      => []
+        }
       end
     end
 
@@ -106,11 +113,6 @@ def events
     def drop_cache
       @events = @fltr_cache = nil
     end
-
-    def event_set
-      categories.blank? ? [] : categories.collect { |_, e| e[:event_groups] }
-    end
-
   end
 
   Options = Struct.new(
@@ -139,14 +141,14 @@ def evt_type
       management_events? ? :event_streams : :policy_events
     end
 
-    def event_set
-      (policy_events? ? policy : management).event_set
-    end
-
     def categories
       (policy_events? ? policy : management).categories
     end
 
+    def get_set(name)
+      categories.values.flat_map { |v| v[name] }
+    end
+
     def drop_cache
       [policy, management].each(&:drop_cache)
     end

lib/report_formatter/timeline.rb

@@ -34,14 +34,23 @@ def build_document_body
       # some of the OOTB reports have db as EventStream or PolicyEvent,
       # those do not have event categories, so need to go thru else block for such reports.
       if (mri.db == "EventStream" || mri.db == "PolicyEvent") && mri.rpt_options.try(:[], :categories)
-        mri.rpt_options[:categories].each do |_, options|
+        event_map = mri.table.data.each_with_object({}) do |event, buckets|
+          bucket_name = mri.rpt_options[:categories].detect do |_, options|
+            options[:include_set].include?(event.event_type)
+          end&.last.try(:[], :display_name)
+
+          bucket_name ||= mri.rpt_options[:categories].detect do |_, options|
+            options[:regexes].any? { |regex| regex.match(event.event_type) }
+          end.last[:display_name]
+
+          buckets[bucket_name] ||= []
+          buckets[bucket_name] << event
+        end
+
+        event_map.each do |name, events|
           @events_data = []
-          all_events = mri.table.data.select { |e| options[:event_groups].include?(e.event_type) }
-          all_events.each do |row|
-            tl_event(row, col) # Add this row to the tl event xml
-          end
-          @events.push(:name => options[:display_name],
-                       :data => [@events_data])
+          events.each { |row| tl_event(row, col) }
+          @events.push(:name => name, :data => [@events_data])
         end
       else
         mri.table.data.each_with_index do |row, _d_idx|

spec/controllers/application_controller/timelines_spec.rb

@@ -47,8 +47,8 @@
         expect(controller).to receive(:render)
         controller.send(:tl_chooser)
         options = assigns(:tl_options)
-        expect(options.management[:categories][:power][:event_groups]).to include('AUTO_FAILED_SUSPEND_VM')
-        expect(options.management[:categories][:power][:event_groups]).to_not include('PowerOffVM_Task')
+        expect(options.management[:categories][:power][:include_set]).to include('AUTO_FAILED_SUSPEND_VM')
+        expect(options.management[:categories][:power][:include_set]).to_not include('PowerOffVM_Task')
       end
 
       it "selecting details option of the selectpicker in the timeline should append them to events filter list" do
@@ -60,8 +60,8 @@
         expect(controller).to receive(:render)
         controller.send(:tl_chooser)
         options = assigns(:tl_options)
-        expect(options.management[:categories][:power][:event_groups]).to include('PowerOffVM_Task')
-        expect(options.management[:categories][:power][:event_groups]).to_not include('AUTO_FAILED_SUSPEND_VM')
+        expect(options.management[:categories][:power][:include_set]).to_not include('AUTO_FAILED_SUSPEND_VM')
+        expect(options.management[:categories][:power][:include_set]).to include('PowerOffVM_Task')
       end
 
       it "selecting two options of the selectpicker in the timeline should append both to events filter list" do
@@ -73,8 +73,8 @@
         expect(controller).to receive(:render)
         controller.send(:tl_chooser)
         options = assigns(:tl_options)
-        expect(options.management[:categories][:power][:event_groups]).to include('AUTO_FAILED_SUSPEND_VM')
-        expect(options.management[:categories][:power][:event_groups]).to include('PowerOffVM_Task')
+        expect(options.management[:categories][:power][:include_set]).to include('AUTO_FAILED_SUSPEND_VM')
+        expect(options.management[:categories][:power][:include_set]).to include('PowerOffVM_Task')
       end
     end
   end

spec/lib/report_formater/timeline_spec.rb

@@ -126,9 +126,11 @@ def stub_ems_event(event_type)
                                    :headers   => %w(id name event_type timestamp),
                                    :timeline  => {:field => "EmsEvent-timestamp", :position => "Last"})
       @report.rpt_options = {:categories => {:power    => {:display_name => "Power Activity",
-                                                           :event_groups => %w(VmPoweredOffEvent VmPoweredOnEvent)},
+                                                           :include_set  => %w(VmPoweredOffEvent VmPoweredOnEvent),
+                                                           :regexes      => []},
                                              :snapshot => {:display_name => "Snapshot Activity",
-                                                           :event_groups => %w(AlarmCreatedEvent AlarmRemovedEvent)}}}
+                                                           :include_set  => %w(AlarmCreatedEvent AlarmRemovedEvent),
+                                                           :regexes      => []}}}
 
       data = []
       30.times do
@@ -172,6 +174,87 @@ def stub_ems_event(event_type)
       expect(JSON.parse(events)[0]["data"][0].length).to eq(45)
     end
   end
+
+  describe '#events count for regex categories' do
+    def stub_ems_event(event_type)
+      ems = FactoryGirl.create(:ems_redhat)
+      EventStream.create!(:event_type => event_type, :ems_id => ems.id)
+    end
+
+    before do
+      @report = FactoryGirl.create(
+        :miq_report,
+        :db        => "EventStream",
+        :col_order => %w(id name event_type timestamp),
+        :headers   => %w(id name event_type timestamp),
+        :timeline  => {:field => "EmsEvent-timestamp", :position => "Last"}
+      )
+      @report.rpt_options = {
+        :categories => {
+          :power    => {
+            :display_name => "Power Activity",
+            :include_set  => [],
+            :regexes      => [/Event$/]
+          },
+          :snapshot => {
+            :display_name => "Snapshot Activity",
+            :include_set  => %w(AlarmCreatedEvent AlarmRemovedEvent),
+            :regexes      => []
+          }
+        }
+      }
+
+      data = []
+      (1..5).each do |n|
+        event_type = "VmPower#{n}Event"
+        data.push(
+          Ruport::Data::Record.new(
+            "id"         => stub_ems_event(event_type).id,
+            "name"       => "Baz",
+            "event_type" => event_type,
+            "timestamp"  => Time.zone.now
+          )
+        )
+      end
+
+      7.times do
+        data.push(
+          Ruport::Data::Record.new(
+            "id"         => stub_ems_event("AlarmRemovedEvent").id,
+            "name"       => "Baz",
+            "event_type" => "AlarmRemovedEvent",
+            "timestamp"  => Time.zone.now
+          )
+        )
+      end
+
+      @report.table = Ruport::Data::Table.new(
+        :column_names => %w(id name event_type timestamp),
+        :data         => data
+      )
+    end
+
+    it 'shows correct count of timeline events based on categories' do
+      allow_any_instance_of(Ruport::Controller::Options).to receive(:mri).and_return(@report)
+      events = ReportFormatter::ReportTimeline.new.build_document_body
+      expect(JSON.parse(events)[0]["data"][0].length).to eq(5)
+      expect(JSON.parse(events)[1]["data"][0].length).to eq(7)
+    end
+
+    it 'shows correct count of timeline events together for report object with no categories' do
+      @report.rpt_options = {}
+      allow_any_instance_of(Ruport::Controller::Options).to receive(:mri).and_return(@report)
+      events = ReportFormatter::ReportTimeline.new.build_document_body
+      expect(JSON.parse(events)[0]["data"][0].length).to eq(12)
+    end
+
+    it 'shows correct count of timeline events for timeline based report when rpt_options is nil' do
+      @report.rpt_options = nil
+      allow_any_instance_of(Ruport::Controller::Options).to receive(:mri).and_return(@report)
+      events = ReportFormatter::ReportTimeline.new.build_document_body
+      expect(JSON.parse(events)[0]["data"][0].length).to eq(12)
+    end
+  end
 end
 
 describe '#set data for headers that exist in col headers' do
@@ -188,9 +271,11 @@ def stub_ems_event(event_type)
                                  :headers   => %w(id name event_type timestamp vm_location),
                                  :timeline  => {:field => "EmsEvent-timestamp", :position => "Last"})
     @report.rpt_options = {:categories => {:power    => {:display_name => "Power Activity",
-                                                         :event_groups => %w(VmPoweredOffEvent VmPoweredOnEvent)},
+                                                         :include_set  => %w(VmPoweredOffEvent VmPoweredOnEvent),
+                                                         :regexes      => []},
                                            :snapshot => {:display_name => "Snapshot Activity",
-                                                         :event_groups => %w(AlarmCreatedEvent AlarmRemovedEvent)}}}
+                                                         :include_set  => %w(AlarmCreatedEvent AlarmRemovedEvent),
+                                                         :regexes      => []}}}
 
     data = [Ruport::Data::Record.new("id"          => stub_ems_event("VmPoweredOffEvent").id,
                                      "name"        => "Baz",