public override RuleResult Execute()

in src/IdFix/Rules/Shared/NoDuplicatesRule.cs [29:92]
56 lines of code
15 McCabe index (conditional complexity)

        public override RuleResult Execute(ComposedRule parent, SearchResultEntry entry, string attributeValue)
        {
            // record in memory the entry details with a list of the attributes that end up needing to be checked
            if (DuplicateStore.IsDuplicate(parent.AttributeName, attributeValue, entry))
            {
                // we now need to execute some complicated logic from the original application depending
                // settings, etc. this isn't pretty but it follows the original for now

                var actionType = ActionType.Edit;
                var originalValue = entry.Attributes[parent.AttributeName][0].ToString();

                // if nothing else has changed the value prior to this (which is why no duplicate rule needs to be run last)
                if (originalValue == attributeValue)
                {
                    switch (parent.AttributeName.ToLowerInvariant())
                    {
                        case "proxyaddresses":
                            if (Constants.SMTPRegex.IsMatch(attributeValue))
                            {
                                if (entry.Attributes.Contains(StringLiterals.MailNickName))
                                {
                                    if (attributeValue.ToLowerInvariant().Substring(0, 5) == "smtp:")
                                    {
                                        actionType = ActionType.Complete;
                                    }
                                }
                                else
                                {
                                    actionType = ActionType.Remove;
                                }
                            }
                            break;
                        case "userprincipalname":
                            if (entry.Attributes.Contains(StringLiterals.MailNickName))
                            {
                                actionType = ActionType.Complete;
                            }
                            break;
                        case "mail":
                            if (entry.Attributes.Contains(StringLiterals.MailNickName))
                            {
                                actionType = ActionType.Complete;
                            }
                            break;
                        case "mailnickname":
                            if (entry.Attributes.Contains(StringLiterals.HomeMdb))
                            {
                                actionType = ActionType.Complete;
                            }
                            break;
                        case "samaccountname":
                            if (entry.Attributes.Contains(StringLiterals.MailNickName))
                            {
                                actionType = ActionType.Complete;
                            }
                            break;
                    }
                }

                return this.GetErrorResult(ErrorType.Duplicate, attributeValue, actionType);
            }

            return this.GetSuccessResult();
        }