show user name in user profile rows on access report

test plan:
* enable page views
* as a user, visit the course profile page of another user
* the visitor's access report should show the visited user's
 name, rather than a blank "Content" column

closes #CNVS-22233

Change-Id: Ifaa4bd9fcdee7a805e00dc23f313262e9925325a
Reviewed-on: https://gerrit.instructure.com/59836
Tested-by: Jenkins
Reviewed-by: Jeremy Stanley <jeremy@instructure.com>
QA-Review: Charles Kimball <ckimball@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>

app/models/asset_user_access.rb

@@ -58,7 +58,7 @@ class AssetUserAccess < ActiveRecord::Base
     res[:totals] = {}
     res[:prior_totals] = {}
     Rails.cache.fetch(['access_by_category', list.first, list.last, list.length].cache_key) do
-      list.each{|a| 
+      list.each{|a|
         a.category ||= 'unknown'
         cat = res[:categories][a.category] || {}
         cat[:view_tally] ||= 0
@@ -83,7 +83,7 @@ class AssetUserAccess < ActiveRecord::Base
         res[:totals][:participate_tally] ||= 0
         res[:totals][:participate_tally] += a.participate_score || 0
       }
-      (old_list || []).each{|a| 
+      (old_list || []).each{|a|
         a.category ||= 'unknown'
         cat = res[:categories][a.category] || {}
         cat[:prior_view_tally] ||= 0
@@ -103,7 +103,7 @@ class AssetUserAccess < ActiveRecord::Base
         res[:prior_totals][:participate_tally] ||= 0
         res[:prior_totals][:participate_tally] += a.participate_score || 0
       }
-      res[:categories].each{|key, val| 
+      res[:categories].each{|key, val|
         res[:categories][key][:participate_average] = (res[:categories][key][:participate_tally].to_f / res[:totals][:participate_tally].to_f * 100).round / 100.0 rescue 0
         res[:categories][key][:view_average] = (res[:categories][key][:view_tally].to_f / res[:totals][:view_tally].to_f * 100).round rescue 0
         res[:categories][key][:interaction_seconds_average] = (res[:categories][key][:interaction_seconds].to_f / res[:categories][key][:view_tally].to_f * 100).round / 100.0 rescue 0
@@ -160,6 +160,7 @@ class AssetUserAccess < ActiveRecord::Base
     return nil unless asset_code
     asset_code, general = self.asset_code.split(":").reverse
     asset = Context.find_asset_by_asset_string(asset_code, context)
+    asset ||= (match = asset_code.match(/enrollment_(\d+)/)) && Enrollment.where(:id => match[1]).first
     asset
   end
 

spec/integration/asset_accesses_spec.rb

@@ -86,4 +86,10 @@ describe "user asset accesses" do
     expect(html.css('#usage_report .access.assignment .last_viewed').text.strip).to eq datetime_string(now2)
     expect(AssetUserAccess.where(:user_id => @student).first.last_access.to_i).to eq now2.to_i
   end
+
+  it "should record user names when viewing profiles" do
+    user_session(@student)
+    get "/courses/#{@course.id}/users/#{@teacher.id}"
+    expect(AssetUserAccess.where(:user_id => @student).first.display_name).to eq @teacher.name
+  end
 end