anchor.diff:                     ng-model="user.profile.google_plus"
                      class="form-control"
                      id="user_google_plus"
  +                   ng-pattern="/^https?:\/\/.*?google/"
                      placeholder="{{ 'google_plus' | translate }}"
                      ng-disabled="preventField['profile.google_plus'] && user.profile.first_name && !userForm['user[profile_attributes][google_plus]'].$dirty"
               />
  
positive.code:                    ng-model="user.profile.youtube"
                     class="form-control"
                     id="user_youtube"
                     placeholder="{{ 'youtube' | translate }}"
                     ng-disabled="preventField['profile.youtube'] && user.profile.first_name && !userForm['user[profile_attributes][youtube]'].$dirty"
              />
  
negative.code:                    ng-model="user.profile.twitter"
                     class="form-control"
                     id="user_twitter"
                     ng-pattern="/^https?:\/\/.*?twitter/"
                     placeholder="{{ 'twitter' | translate }}"
                     ng-disabled="preventField['profile.twitter'] && user.profile.first_name && !userForm['user[profile_attributes][twitter]'].$dirty"
              />
  