resource.go

/**
* @license
* Copyright 2020 Dynatrace LLC
*
* 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.
 */

package publicendpoints

import (
	"context"
	"fmt"

	publicendpoints "github.com/dynatrace-oss/terraform-provider-dynatrace/dynatrace/api/cluster/v1/publicendpoints"
	publicendpoints_settings "github.com/dynatrace-oss/terraform-provider-dynatrace/dynatrace/api/cluster/v1/publicendpoints/settings"
	"github.com/dynatrace-oss/terraform-provider-dynatrace/provider/config"
	"github.com/dynatrace-oss/terraform-provider-dynatrace/provider/logging"
	"github.com/dynatrace-oss/terraform-provider-dynatrace/terraform/confighcl"
	"github.com/dynatrace-oss/terraform-provider-dynatrace/terraform/hcl"
	"github.com/google/uuid"

	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
)

// Resource produces terraform resource definition for Management Zones
func Resource() *schema.Resource {
	return &schema.Resource{
		Schema:        new(publicendpoints_settings.Settings).Schema(),
		CreateContext: logging.Enable(Create),
		UpdateContext: logging.Enable(Update),
		ReadContext:   logging.Enable(Read),
		DeleteContext: logging.Enable(Delete),
		Importer:      &schema.ResourceImporter{StateContext: schema.ImportStatePassthroughContext},
	}
}

func NewService(m any) *publicendpoints.ServiceClient {
	conf := m.(*config.ProviderConfiguration)
	apiService := publicendpoints.NewService(fmt.Sprintf("%s%s", conf.ClusterAPIV2URL, "/api/v1.0/onpremise"), conf.ClusterAPIToken)
	return apiService
}

// Create expects the configuration within the given ResourceData and sends it to the Dynatrace Server in order to create that resource
func Create(ctx context.Context, d *schema.ResourceData, m any) diag.Diagnostics {
	_, err := config.Credentials(m, config.CredValCluster)
	if err != nil {
		return diag.FromErr(err)
	}
	config := new(publicendpoints_settings.Settings)
	if err := config.UnmarshalHCL(hcl.DecoderFrom(d)); err != nil {
		return diag.FromErr(err)
	}

	if err := NewService(m).Create(config); err != nil {
		return diag.FromErr(err)
	}
	d.SetId(uuid.NewString())

	marshalled := hcl.Properties{}
	if err := config.MarshalHCL(marshalled); err != nil {
		return diag.FromErr(err)
	}
	for k, v := range marshalled {
		d.Set(k, v)
	}

	return diag.Diagnostics{}
}

// Update expects the configuration within the given ResourceData and send them to the Dynatrace Server in order to update that resource
func Update(ctx context.Context, d *schema.ResourceData, m any) diag.Diagnostics {
	_, err := config.Credentials(m, config.CredValCluster)
	if err != nil {
		return diag.FromErr(err)
	}
	config := new(publicendpoints_settings.Settings)
	if err := config.UnmarshalHCL(hcl.DecoderFrom(d)); err != nil {
		return diag.FromErr(err)
	}

	if err := NewService(m).Update(config); err != nil {
		return diag.FromErr(err)
	}

	marshalled := hcl.Properties{}
	if err := config.MarshalHCL(marshalled); err != nil {
		return diag.FromErr(err)
	}
	for k, v := range marshalled {
		d.Set(k, v)
	}

	return diag.Diagnostics{}
}

// Read queries the Dynatrace Server for the configuration
func Read(ctx context.Context, d *schema.ResourceData, m any) diag.Diagnostics {
	_, err := config.Credentials(m, config.CredValCluster)
	if err != nil {
		return diag.FromErr(err)
	}

	stateDecoder := confighcl.StateDecoderFrom(d, Resource())
	stateConfig := new(publicendpoints_settings.Settings)
	if err := stateConfig.UnmarshalHCL(stateDecoder); err != nil {
		return diag.FromErr(err)
	}

	config := publicendpoints_settings.Settings{}
	service := NewService(m)

	if stateConfig.WebUiAddress != nil && *stateConfig.WebUiAddress != "" {
		if config.WebUiAddress, err = service.GetWebUiAddress(); err != nil {
			return diag.FromErr(err)
		}
	}
	if len(stateConfig.AdditionalWebUiAddresses) > 0 {
		if config.AdditionalWebUiAddresses, err = service.GetAdditionalWebUiAddresses(); err != nil {
			return diag.FromErr(err)
		}
	}
	if stateConfig.BeaconForwarderAddress != nil && *stateConfig.BeaconForwarderAddress != "" {
		if config.BeaconForwarderAddress, err = service.GetBeaconForwarderAddress(); err != nil {
			return diag.FromErr(err)
		}
	}
	if stateConfig.CDNAddress != nil && *stateConfig.CDNAddress != "" {
		if config.CDNAddress, err = service.GetCDNAddress(); err != nil {
			return diag.FromErr(err)
		}
	}

	marshalled := hcl.Properties{}
	if err := config.MarshalHCL(marshalled); err != nil {
		return diag.FromErr(err)
	}
	for k, v := range marshalled {
		d.Set(k, v)
	}

	return diag.Diagnostics{}
}

// Delete the configuration
func Delete(ctx context.Context, d *schema.ResourceData, m any) diag.Diagnostics {
	return diag.Diagnostics{
		diag.Diagnostic{
			Severity: 1,
			Summary:  "HTTP DELETE method not available",
			Detail:   "The configuration will no longer be managed by Terraform but will still be present on the Dynatrace cluster since a delete method is not available.",
		},
	}
}