AngularJS关于性能和处理验证的更好方法是什么

Question

我的代码工作正常，但是我正在寻找一种更好的方法来进行验证。我是angularjs的新手，需要帮助提高我的编码技能。

我在代码中有5个场景来验证所有场景。

首先，通过sourcing.startDate验证assignment.startDate

第二，assignment.startDate与采购.endDate

第三，assignment.endDate和Assignment.startDate

第四，assignment.endDate和purchase.startDate

第五，assignment.endDate与采购.endDate

$timeout(function () {
                    if (moment(vm.assignment.startDate) < moment(vm.procurement.startDate)) {
                        $scope.assignmentForm.startDate.$setValidity('mindate', false);
                        $scope.assignmentForm.startDate.$setTouched();
                        $scope.assignmentForm.startDate.$validate();
                        vm.endDateValidationMessage = "Start Date of Assignment Agreement cannot be earlier than Start Date of Procurement Agreement";
                    } else {
                        $scope.assignmentForm.startDate.$setValidity('mindate', true);
                        $scope.assignmentForm.startDate.$setTouched();
                        $scope.assignmentForm.startDate.$validate();
                    }

                    if (moment(vm.assignment.startDate) > moment(vm.procurement.endDate)) {
                        $scope.assignmentForm.startDate.$setValidity('maxdate', false);
                        $scope.assignmentForm.startDate.$setTouched();
                        $scope.assignmentForm.startDate.$validate();
                        vm.endDateValidationMessage = "Start Date of Assignment Agreement cannot be later than End Date of Procurement Agreement";
                    } else {
                        $scope.assignmentForm.startDate.$setValidity('maxdate', true);
                        $scope.assignmentForm.startDate.$setTouched();
                        $scope.assignmentForm.startDate.$validate();
                    }

                    if (moment(vm.assignment.endDate) < moment(vm.assignment.startDate)) {
                        $scope.assignmentForm.endDate.$setValidity('mindate', false);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                        vm.endDateValidationMessage = "End Date of Assignment Agreement cannot be earlier than Start Date of Assignment Agreement";
                    } else {
                        $scope.assignmentForm.endDate.$setValidity('mindate', true);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                    }

                    if (moment(vm.assignment.endDate) < moment(vm.procurement.startDate)) {
                        $scope.assignmentForm.endDate.$setValidity('maxdate', false);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                        vm.endDateValidationMessage = "End Date of Assignment Agreement cannot be earlier than Start Date of Procurement Agreement";
                    } else {
                        $scope.assignmentForm.endDate.$setValidity('maxdate', true);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                    }

                    if (moment(vm.assignment.endDate) > moment(vm.procurement.endDate)) {
                        $scope.assignmentForm.endDate.$setValidity('mindate', false);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                        vm.endDateValidationMessage = "End Date of Assignment Agreement cannot be later than End Date of Procurement Agreement";
                    } else {
                        $scope.assignmentForm.endDate.$setValidity('mindate', true);
                        $scope.assignmentForm.endDate.$setTouched();
                        $scope.assignmentForm.endDate.$validate();
                    }

                })

<div>
                            <md-input-container class="md-block date-picker">
                                <md-datepicker md-no-asterisk placeholder="Start Date" name="startDate" ng-change="$ctrl.validateMinDate()"
                                    md-min-date="$ctrl.procurement.startDate" md-max-date="$ctrl.procurement.endDate"
                                    ng-required="true" md-open-on-focus ng-model="$ctrl.assignment.startDate"></md-datepicker>
                                <div class="error-wrap" ng-messages="assignmentForm.startDate.$error">
                                    <div ng-message="required">Required.</div>
                                    <div ng-message="mindate">Start Date of Assignment Agreement cannot be earlier than
                                        Start Date of Procurement Agreement</div>
                                    <div ng-message="maxdate">Start Date of Assignment Agreement cannot be after than
                                        End Date of Procurement Agreement</div>
                                </div>
                            </md-input-container>
                        </div>
                        <div>
                            <md-input-container class="md-block date-picker">
                                <md-datepicker md-no-asterisk placeholder="End Date" name="endDate" ng-change="$ctrl.validateMinDate()"
                                    ng-required="true" md-open-on-focus ng-model="$ctrl.assignment.endDate"></md-datepicker>
                                <div class="error-wrap" ng-messages="assignmentForm.endDate.$error">
                                    <div ng-message="required">Required</div>
                                    <div ng-message="mindate">{{$ctrl.endDateValidationMessage}}</div>
                                    <div ng-message="maxdate">{{$ctrl.endDateValidationMessage}}</div>
                                </div>
                            </md-input-container>

                        </div>