resourcegroups.go

package features

// Copyright (c) Microsoft and contributors.  All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Code generated by Microsoft (R) AutoRest Code Generator.
// Changes may cause incorrect behavior and will be lost if the code is regenerated.

import (
	"context"
	"github.com/Azure/go-autorest/autorest"
	"github.com/Azure/go-autorest/autorest/azure"
	"github.com/Azure/go-autorest/autorest/validation"
	"github.com/Azure/go-autorest/tracing"
	"net/http"
)

// ResourceGroupsClient is the provides operations for working with resources and resource groups.
type ResourceGroupsClient struct {
	BaseClient
}

// NewResourceGroupsClient creates an instance of the ResourceGroupsClient client.
func NewResourceGroupsClient(subscriptionID string) ResourceGroupsClient {
	return NewResourceGroupsClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewResourceGroupsClientWithBaseURI creates an instance of the ResourceGroupsClient client using a custom endpoint.
// Use this when interacting with an Azure cloud that uses a non-standard base URI (sovereign clouds, Azure stack).
func NewResourceGroupsClientWithBaseURI(baseURI string, subscriptionID string) ResourceGroupsClient {
	return ResourceGroupsClient{NewWithBaseURI(baseURI, subscriptionID)}
}

// CheckExistence checks whether a resource group exists.
// Parameters:
// resourceGroupName - the name of the resource group to check. The name is case insensitive.
func (client ResourceGroupsClient) CheckExistence(ctx context.Context, resourceGroupName string) (result autorest.Response, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.CheckExistence")
		defer func() {
			sc := -1
			if result.Response != nil {
				sc = result.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "CheckExistence", err.Error())
	}

	req, err := client.CheckExistencePreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CheckExistence", nil, "Failure preparing request")
		return
	}

	resp, err := client.CheckExistenceSender(req)
	if err != nil {
		result.Response = resp
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CheckExistence", resp, "Failure sending request")
		return
	}

	result, err = client.CheckExistenceResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CheckExistence", resp, "Failure responding to request")
		return
	}

	return
}

// CheckExistencePreparer prepares the CheckExistence request.
func (client ResourceGroupsClient) CheckExistencePreparer(ctx context.Context, resourceGroupName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsHead(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// CheckExistenceSender sends the CheckExistence request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) CheckExistenceSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// CheckExistenceResponder handles the response to the CheckExistence request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) CheckExistenceResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusNoContent, http.StatusNotFound),
		autorest.ByClosing())
	result.Response = resp
	return
}

// CreateOrUpdate creates or updates a resource group.
// Parameters:
// resourceGroupName - the name of the resource group to create or update. Can include alphanumeric,
// underscore, parentheses, hyphen, period (except at end), and Unicode characters that match the allowed
// characters.
// parameters - parameters supplied to the create or update a resource group.
func (client ResourceGroupsClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, parameters ResourceGroup) (result ResourceGroup, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.CreateOrUpdate")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}},
		{TargetValue: parameters,
			Constraints: []validation.Constraint{{Target: "parameters.Location", Name: validation.Null, Rule: true, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "CreateOrUpdate", err.Error())
	}

	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

	resp, err := client.CreateOrUpdateSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CreateOrUpdate", resp, "Failure sending request")
		return
	}

	result, err = client.CreateOrUpdateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "CreateOrUpdate", resp, "Failure responding to request")
		return
	}

	return
}

// CreateOrUpdatePreparer prepares the CreateOrUpdate request.
func (client ResourceGroupsClient) CreateOrUpdatePreparer(ctx context.Context, resourceGroupName string, parameters ResourceGroup) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	parameters.ID = nil
	parameters.Name = nil
	parameters.Type = nil
	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPut(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// CreateOrUpdateSender sends the CreateOrUpdate request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) CreateOrUpdateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// CreateOrUpdateResponder handles the response to the CreateOrUpdate request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) CreateOrUpdateResponder(resp *http.Response) (result ResourceGroup, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusCreated),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Delete when you delete a resource group, all of its resources are also deleted. Deleting a resource group deletes
// all of its template deployments and currently stored operations.
// Parameters:
// resourceGroupName - the name of the resource group to delete. The name is case insensitive.
func (client ResourceGroupsClient) Delete(ctx context.Context, resourceGroupName string) (result ResourceGroupsDeleteFuture, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.Delete")
		defer func() {
			sc := -1
			if result.Response() != nil {
				sc = result.Response().StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "Delete", err.Error())
	}

	req, err := client.DeletePreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Delete", nil, "Failure preparing request")
		return
	}

	result, err = client.DeleteSender(req)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Delete", result.Response(), "Failure sending request")
		return
	}

	return
}

// DeletePreparer prepares the Delete request.
func (client ResourceGroupsClient) DeletePreparer(ctx context.Context, resourceGroupName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// DeleteSender sends the Delete request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) DeleteSender(req *http.Request) (future ResourceGroupsDeleteFuture, err error) {
	var resp *http.Response
	resp, err = client.Send(req, azure.DoRetryWithRegistration(client.Client))
	if err != nil {
		return
	}
	future.Future, err = azure.NewFutureFromResponse(resp)
	return
}

// DeleteResponder handles the response to the Delete request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) DeleteResponder(resp *http.Response) (result autorest.Response, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK, http.StatusAccepted),
		autorest.ByClosing())
	result.Response = resp
	return
}

// ExportTemplate captures the specified resource group as a template.
// Parameters:
// resourceGroupName - the name of the resource group to export as a template.
// parameters - parameters for exporting the template.
func (client ResourceGroupsClient) ExportTemplate(ctx context.Context, resourceGroupName string, parameters ExportTemplateRequest) (result ResourceGroupExportResult, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.ExportTemplate")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "ExportTemplate", err.Error())
	}

	req, err := client.ExportTemplatePreparer(ctx, resourceGroupName, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "ExportTemplate", nil, "Failure preparing request")
		return
	}

	resp, err := client.ExportTemplateSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "ExportTemplate", resp, "Failure sending request")
		return
	}

	result, err = client.ExportTemplateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "ExportTemplate", resp, "Failure responding to request")
		return
	}

	return
}

// ExportTemplatePreparer prepares the ExportTemplate request.
func (client ResourceGroupsClient) ExportTemplatePreparer(ctx context.Context, resourceGroupName string, parameters ExportTemplateRequest) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPost(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}/exportTemplate", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ExportTemplateSender sends the ExportTemplate request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) ExportTemplateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// ExportTemplateResponder handles the response to the ExportTemplate request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) ExportTemplateResponder(resp *http.Response) (result ResourceGroupExportResult, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// Get gets a resource group.
// Parameters:
// resourceGroupName - the name of the resource group to get. The name is case insensitive.
func (client ResourceGroupsClient) Get(ctx context.Context, resourceGroupName string) (result ResourceGroup, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.Get")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "Get", err.Error())
	}

	req, err := client.GetPreparer(ctx, resourceGroupName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Get", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Get", resp, "Failure sending request")
		return
	}

	result, err = client.GetResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Get", resp, "Failure responding to request")
		return
	}

	return
}

// GetPreparer prepares the Get request.
func (client ResourceGroupsClient) GetPreparer(ctx context.Context, resourceGroupName string) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetSender sends the Get request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) GetSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// GetResponder handles the response to the Get request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) GetResponder(resp *http.Response) (result ResourceGroup, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// List gets all the resource groups for a subscription.
// Parameters:
// filter - the filter to apply on the operation.<br><br>You can filter by tag names and values. For example,
// to filter for a tag name and value, use $filter=tagName eq 'tag1' and tagValue eq 'Value1'
// top - the number of results to return. If null is passed, returns all resource groups.
func (client ResourceGroupsClient) List(ctx context.Context, filter string, top *int32) (result ResourceGroupListResultPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.List")
		defer func() {
			sc := -1
			if result.rglr.Response.Response != nil {
				sc = result.rglr.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.fn = client.listNextResults
	req, err := client.ListPreparer(ctx, filter, top)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "List", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListSender(req)
	if err != nil {
		result.rglr.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "List", resp, "Failure sending request")
		return
	}

	result.rglr, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "List", resp, "Failure responding to request")
		return
	}
	if result.rglr.hasNextLink() && result.rglr.IsEmpty() {
		err = result.NextWithContext(ctx)
	}

	return
}

// ListPreparer prepares the List request.
func (client ResourceGroupsClient) ListPreparer(ctx context.Context, filter string, top *int32) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"subscriptionId": autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}
	if len(filter) > 0 {
		queryParameters["$filter"] = autorest.Encode("query", filter)
	}
	if top != nil {
		queryParameters["$top"] = autorest.Encode("query", *top)
	}

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListSender sends the List request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) ListSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// ListResponder handles the response to the List request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) ListResponder(resp *http.Response) (result ResourceGroupListResult, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}

// listNextResults retrieves the next set of results, if any.
func (client ResourceGroupsClient) listNextResults(ctx context.Context, lastResults ResourceGroupListResult) (result ResourceGroupListResult, err error) {
	req, err := lastResults.resourceGroupListResultPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "listNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "listNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "listNextResults", resp, "Failure responding to next results request")
		return
	}
	return
}

// ListComplete enumerates all values, automatically crossing page boundaries as required.
func (client ResourceGroupsClient) ListComplete(ctx context.Context, filter string, top *int32) (result ResourceGroupListResultIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.List")
		defer func() {
			sc := -1
			if result.Response().Response.Response != nil {
				sc = result.page.Response().Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	result.page, err = client.List(ctx, filter, top)
	return
}

// Update resource groups can be updated through a simple PATCH operation to a group address. The format of the request
// is the same as that for creating a resource group. If a field is unspecified, the current value is retained.
// Parameters:
// resourceGroupName - the name of the resource group to update. The name is case insensitive.
// parameters - parameters supplied to update a resource group.
func (client ResourceGroupsClient) Update(ctx context.Context, resourceGroupName string, parameters ResourceGroupPatchable) (result ResourceGroup, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/ResourceGroupsClient.Update")
		defer func() {
			sc := -1
			if result.Response.Response != nil {
				sc = result.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: resourceGroupName,
			Constraints: []validation.Constraint{{Target: "resourceGroupName", Name: validation.MaxLength, Rule: 90, Chain: nil},
				{Target: "resourceGroupName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "resourceGroupName", Name: validation.Pattern, Rule: `^[-\p{L}\._\(\)\w]+$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("features.ResourceGroupsClient", "Update", err.Error())
	}

	req, err := client.UpdatePreparer(ctx, resourceGroupName, parameters)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Update", nil, "Failure preparing request")
		return
	}

	resp, err := client.UpdateSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Update", resp, "Failure sending request")
		return
	}

	result, err = client.UpdateResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "features.ResourceGroupsClient", "Update", resp, "Failure responding to request")
		return
	}

	return
}

// UpdatePreparer prepares the Update request.
func (client ResourceGroupsClient) UpdatePreparer(ctx context.Context, resourceGroupName string, parameters ResourceGroupPatchable) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"resourceGroupName": autorest.Encode("path", resourceGroupName),
		"subscriptionId":    autorest.Encode("path", client.SubscriptionID),
	}

	const APIVersion = "2019-07-01"
	queryParameters := map[string]interface{}{
		"api-version": APIVersion,
	}

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPatch(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourcegroups/{resourceGroupName}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// UpdateSender sends the Update request. The method will close the
// http.Response Body if it receives an error.
func (client ResourceGroupsClient) UpdateSender(req *http.Request) (*http.Response, error) {
	return client.Send(req, azure.DoRetryWithRegistration(client.Client))
}

// UpdateResponder handles the response to the Update request. The method always
// closes the http.Response Body.
func (client ResourceGroupsClient) UpdateResponder(resp *http.Response) (result ResourceGroup, err error) {
	err = autorest.Respond(
		resp,
		azure.WithErrorUnlessStatusCode(http.StatusOK),
		autorest.ByUnmarshallingJSON(&result),
		autorest.ByClosing())
	result.Response = autorest.Response{Response: resp}
	return
}