identityprovider.go

package apimanagement

// 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"
)

// IdentityProviderClient is the apiManagement Client
type IdentityProviderClient struct {
	BaseClient
}

// NewIdentityProviderClient creates an instance of the IdentityProviderClient client.
func NewIdentityProviderClient(subscriptionID string) IdentityProviderClient {
	return NewIdentityProviderClientWithBaseURI(DefaultBaseURI, subscriptionID)
}

// NewIdentityProviderClientWithBaseURI creates an instance of the IdentityProviderClient client.
func NewIdentityProviderClientWithBaseURI(baseURI string, subscriptionID string) IdentityProviderClient {
	return IdentityProviderClient{NewWithBaseURI(baseURI, subscriptionID)}
}

// CreateOrUpdate creates or Updates the IdentityProvider configuration.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
// identityProviderName - identity Provider Type identifier.
// parameters - create parameters.
// ifMatch - eTag of the Entity. Not required when creating an entity, but required when updating an entity.
func (client IdentityProviderClient) CreateOrUpdate(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType, parameters IdentityProviderContract, ifMatch string) (result IdentityProviderContract, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.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: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}},
		{TargetValue: parameters,
			Constraints: []validation.Constraint{{Target: "parameters.IdentityProviderContractProperties", Name: validation.Null, Rule: false,
				Chain: []validation.Constraint{{Target: "parameters.IdentityProviderContractProperties.ClientID", Name: validation.Null, Rule: true,
					Chain: []validation.Constraint{{Target: "parameters.IdentityProviderContractProperties.ClientID", Name: validation.MinLength, Rule: 1, Chain: nil}}},
					{Target: "parameters.IdentityProviderContractProperties.ClientSecret", Name: validation.Null, Rule: true,
						Chain: []validation.Constraint{{Target: "parameters.IdentityProviderContractProperties.ClientSecret", Name: validation.MinLength, Rule: 1, Chain: nil}}},
				}}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "CreateOrUpdate", err.Error())
	}

	req, err := client.CreateOrUpdatePreparer(ctx, resourceGroupName, serviceName, identityProviderName, parameters, ifMatch)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "CreateOrUpdate", nil, "Failure preparing request")
		return
	}

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

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

	return
}

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

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

	preparer := autorest.CreatePreparer(
		autorest.AsContentType("application/json; charset=utf-8"),
		autorest.AsPut(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders/{identityProviderName}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters))
	if len(ifMatch) > 0 {
		preparer = autorest.DecoratePreparer(preparer,
			autorest.WithHeader("If-Match", autorest.String(ifMatch)))
	}
	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 IdentityProviderClient) CreateOrUpdateSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// Delete deletes the specified identity provider configuration.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
// identityProviderName - identity Provider Type identifier.
// ifMatch - eTag of the Entity. ETag should match the current entity state from the header response of the GET
// request or it should be * for unconditional update.
func (client IdentityProviderClient) Delete(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType, ifMatch string) (result autorest.Response, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.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: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "Delete", err.Error())
	}

	req, err := client.DeletePreparer(ctx, resourceGroupName, serviceName, identityProviderName, ifMatch)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "Delete", nil, "Failure preparing request")
		return
	}

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

	result, err = client.DeleteResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "Delete", resp, "Failure responding to request")
	}

	return
}

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

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

	preparer := autorest.CreatePreparer(
		autorest.AsDelete(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders/{identityProviderName}", pathParameters),
		autorest.WithQueryParameters(queryParameters),
		autorest.WithHeader("If-Match", autorest.String(ifMatch)))
	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 IdentityProviderClient) DeleteSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// Get gets the configuration details of the identity Provider configured in specified service instance.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
// identityProviderName - identity Provider Type identifier.
func (client IdentityProviderClient) Get(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType) (result IdentityProviderContract, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.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: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "Get", err.Error())
	}

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

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

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

	return
}

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

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

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders/{identityProviderName}", 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 IdentityProviderClient) GetSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// GetEntityTag gets the entity state (Etag) version of the identityProvider specified by its identifier.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
// identityProviderName - identity Provider Type identifier.
func (client IdentityProviderClient) GetEntityTag(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType) (result autorest.Response, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.GetEntityTag")
		defer func() {
			sc := -1
			if result.Response != nil {
				sc = result.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "GetEntityTag", err.Error())
	}

	req, err := client.GetEntityTagPreparer(ctx, resourceGroupName, serviceName, identityProviderName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "GetEntityTag", nil, "Failure preparing request")
		return
	}

	resp, err := client.GetEntityTagSender(req)
	if err != nil {
		result.Response = resp
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "GetEntityTag", resp, "Failure sending request")
		return
	}

	result, err = client.GetEntityTagResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "GetEntityTag", resp, "Failure responding to request")
	}

	return
}

// GetEntityTagPreparer prepares the GetEntityTag request.
func (client IdentityProviderClient) GetEntityTagPreparer(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType) (*http.Request, error) {
	pathParameters := map[string]interface{}{
		"identityProviderName": autorest.Encode("path", identityProviderName),
		"resourceGroupName":    autorest.Encode("path", resourceGroupName),
		"serviceName":          autorest.Encode("path", serviceName),
		"subscriptionId":       autorest.Encode("path", client.SubscriptionID),
	}

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

	preparer := autorest.CreatePreparer(
		autorest.AsHead(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders/{identityProviderName}", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// GetEntityTagSender sends the GetEntityTag request. The method will close the
// http.Response Body if it receives an error.
func (client IdentityProviderClient) GetEntityTagSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// ListByService lists a collection of Identity Provider configured in the specified service instance.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
func (client IdentityProviderClient) ListByService(ctx context.Context, resourceGroupName string, serviceName string) (result IdentityProviderListPage, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.ListByService")
		defer func() {
			sc := -1
			if result.ipl.Response.Response != nil {
				sc = result.ipl.Response.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "ListByService", err.Error())
	}

	result.fn = client.listByServiceNextResults
	req, err := client.ListByServicePreparer(ctx, resourceGroupName, serviceName)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "ListByService", nil, "Failure preparing request")
		return
	}

	resp, err := client.ListByServiceSender(req)
	if err != nil {
		result.ipl.Response = autorest.Response{Response: resp}
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "ListByService", resp, "Failure sending request")
		return
	}

	result.ipl, err = client.ListByServiceResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "ListByService", resp, "Failure responding to request")
	}

	return
}

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

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

	preparer := autorest.CreatePreparer(
		autorest.AsGet(),
		autorest.WithBaseURL(client.BaseURI),
		autorest.WithPathParameters("/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders", pathParameters),
		autorest.WithQueryParameters(queryParameters))
	return preparer.Prepare((&http.Request{}).WithContext(ctx))
}

// ListByServiceSender sends the ListByService request. The method will close the
// http.Response Body if it receives an error.
func (client IdentityProviderClient) ListByServiceSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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

// listByServiceNextResults retrieves the next set of results, if any.
func (client IdentityProviderClient) listByServiceNextResults(ctx context.Context, lastResults IdentityProviderList) (result IdentityProviderList, err error) {
	req, err := lastResults.identityProviderListPreparer(ctx)
	if err != nil {
		return result, autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "listByServiceNextResults", nil, "Failure preparing next results request")
	}
	if req == nil {
		return
	}
	resp, err := client.ListByServiceSender(req)
	if err != nil {
		result.Response = autorest.Response{Response: resp}
		return result, autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "listByServiceNextResults", resp, "Failure sending next results request")
	}
	result, err = client.ListByServiceResponder(resp)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "listByServiceNextResults", resp, "Failure responding to next results request")
	}
	return
}

// ListByServiceComplete enumerates all values, automatically crossing page boundaries as required.
func (client IdentityProviderClient) ListByServiceComplete(ctx context.Context, resourceGroupName string, serviceName string) (result IdentityProviderListIterator, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.ListByService")
		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.ListByService(ctx, resourceGroupName, serviceName)
	return
}

// Update updates an existing IdentityProvider configuration.
// Parameters:
// resourceGroupName - the name of the resource group.
// serviceName - the name of the API Management service.
// identityProviderName - identity Provider Type identifier.
// parameters - update parameters.
// ifMatch - eTag of the Entity. ETag should match the current entity state from the header response of the GET
// request or it should be * for unconditional update.
func (client IdentityProviderClient) Update(ctx context.Context, resourceGroupName string, serviceName string, identityProviderName IdentityProviderType, parameters IdentityProviderUpdateParameters, ifMatch string) (result autorest.Response, err error) {
	if tracing.IsEnabled() {
		ctx = tracing.StartSpan(ctx, fqdn+"/IdentityProviderClient.Update")
		defer func() {
			sc := -1
			if result.Response != nil {
				sc = result.Response.StatusCode
			}
			tracing.EndSpan(ctx, sc, err)
		}()
	}
	if err := validation.Validate([]validation.Validation{
		{TargetValue: serviceName,
			Constraints: []validation.Constraint{{Target: "serviceName", Name: validation.MaxLength, Rule: 50, Chain: nil},
				{Target: "serviceName", Name: validation.MinLength, Rule: 1, Chain: nil},
				{Target: "serviceName", Name: validation.Pattern, Rule: `^[a-zA-Z](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?$`, Chain: nil}}}}); err != nil {
		return result, validation.NewError("apimanagement.IdentityProviderClient", "Update", err.Error())
	}

	req, err := client.UpdatePreparer(ctx, resourceGroupName, serviceName, identityProviderName, parameters, ifMatch)
	if err != nil {
		err = autorest.NewErrorWithError(err, "apimanagement.IdentityProviderClient", "Update", nil, "Failure preparing request")
		return
	}

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

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

	return
}

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

	const APIVersion = "2019-01-01"
	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}/providers/Microsoft.ApiManagement/service/{serviceName}/identityProviders/{identityProviderName}", pathParameters),
		autorest.WithJSON(parameters),
		autorest.WithQueryParameters(queryParameters),
		autorest.WithHeader("If-Match", autorest.String(ifMatch)))
	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 IdentityProviderClient) UpdateSender(req *http.Request) (*http.Response, error) {
	return autorest.SendWithSender(client, req,
		azure.DoRetryWithRegistration(client.Client))
}

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