show content shares tab to admins w/o enrollments

test plan:
 - as an account admin user with no course enrollments,
   you should
   (1) see the content share tab in your user profile
   (2) clicking it should work and take you to a page
       that shows a "no content shared" message if you
       have not yet received any shares

fixes LA-171

flag=direct_share

Change-Id: If421c418bf29ce520644dbc52653e2f31a91c637
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/217636
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Tested-by: Jenkins
Reviewed-by: James Williams <jamesw@instructure.com>
QA-Review: Anju Reddy <areddy@instructure.com>
Product-Review: Jeremy Stanley <jeremy@instructure.com>

app/controllers/profile_controller.rb

@@ -473,7 +473,7 @@ class ProfileController < ApplicationController
   end
 
   def content_shares
-    raise not_found if !@domain_root_account.feature_enabled?(:direct_share) || !@current_user.non_student_enrollment?
+    raise not_found unless @domain_root_account.feature_enabled?(:direct_share) && @current_user.can_content_share?
 
     @user ||= @current_user
     set_active_tab 'content_shares'

app/models/user.rb

@@ -1815,6 +1815,17 @@ class User < ActiveRecord::Base
     end
   end
 
+  def account_membership?
+    return @_account_membership if defined?(@_account_membership)
+    @_account_membership = Rails.cache.fetch_with_batched_keys(['has_account_user', ApplicationController.region ].cache_key, batch_object: self, batched_keys: :account_users) do
+      self.account_users.shard(in_region_associated_shards).active.exists?
+    end
+  end
+
+  def can_content_share?
+    non_student_enrollment? || account_membership?
+  end
+
   def participating_current_and_concluded_course_ids
     cached_course_ids('current_and_concluded') do |enrollments|
       enrollments.current_and_concluded.not_inactive_by_date_ignoring_access

app/models/user_profile.rb

@@ -105,7 +105,7 @@ class UserProfile < ActiveRecord::Base
   end
 
   def insert_content_shares_tab(tabs, user, opts)
-    if user && user.non_student_enrollment? && opts[:root_account]&.feature_enabled?(:direct_share)
+    if user && opts[:root_account]&.feature_enabled?(:direct_share) && user.can_content_share?
       tabs << {
         id: TAB_CONTENT_SHARES,
         label: I18n.t("Shared Content"),

spec/controllers/profile_controller_spec.rb

@@ -257,6 +257,12 @@ describe ProfileController do
         expect(assigns.dig(:js_env, :COMMON_CARTRIDGE_VIEWER_URL)).to eq('the_ccv_url')
       end
 
+      it "should show if the user has an account membership" do
+        user_session(account_admin_user)
+        get 'content_shares', params: {user_id: @admin.id}
+        expect(response).to render_template('content_shares')
+      end
+
       it "should 404 if user has only student enrollments" do
         user_session(@student)
         get 'content_shares', params: {user_id: @student.id}

spec/models/user_profile_spec.rb

@@ -43,6 +43,13 @@ describe UserProfile do
         expect(tabs.map { |t| t[:id] }).to include UserProfile::TAB_CONTENT_SHARES
       end
 
+      it "should show shared content tab when user has account membership" do
+        account_admin_user(account: account)
+        account.enable_feature!(:direct_share)
+        tabs = @admin.profile.tabs_available(@admin, :root_account => account)
+        expect(tabs.map { |t| t[:id] }).to include UserProfile::TAB_CONTENT_SHARES
+      end
+
       it "should not show shared content tab when user has only student enrollments" do
         student_in_course(:active_all => true)
         account.enable_feature!(:direct_share)