eventgrid_topic_resource.go

package eventgrid

import (
	"fmt"
	"log"
	"time"

	"github.com/Azure/azure-sdk-for-go/services/preview/eventgrid/mgmt/2020-04-01-preview/eventgrid"
	"github.com/hashicorp/go-azure-helpers/response"
	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
	"github.com/hashicorp/terraform-plugin-sdk/helper/validation"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/azure"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/helpers/tf"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/clients"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/features"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/services/eventgrid/parse"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/tags"
	azSchema "github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/tf/schema"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/internal/timeouts"
	"github.com/terraform-providers/terraform-provider-azurerm/azurerm/utils"
)

func resourceArmEventGridTopic() *schema.Resource {
	return &schema.Resource{
		Create: resourceArmEventGridTopicCreateUpdate,
		Read:   resourceArmEventGridTopicRead,
		Update: resourceArmEventGridTopicCreateUpdate,
		Delete: resourceArmEventGridTopicDelete,

		Timeouts: &schema.ResourceTimeout{
			Create: schema.DefaultTimeout(30 * time.Minute),
			Read:   schema.DefaultTimeout(5 * time.Minute),
			Update: schema.DefaultTimeout(30 * time.Minute),
			Delete: schema.DefaultTimeout(30 * time.Minute),
		},

		Importer: azSchema.ValidateResourceIDPriorToImport(func(id string) error {
			_, err := parse.EventGridTopicID(id)
			return err
		}),

		Schema: map[string]*schema.Schema{
			"name": {
				Type:         schema.TypeString,
				Required:     true,
				ForceNew:     true,
				ValidateFunc: validation.StringIsNotEmpty,
			},

			"location": azure.SchemaLocation(),

			"resource_group_name": azure.SchemaResourceGroupName(),

			"input_schema": {
				Type:     schema.TypeString,
				Optional: true,
				Default:  string(eventgrid.InputSchemaEventGridSchema),
				ForceNew: true,
				ValidateFunc: validation.StringInSlice([]string{
					string(eventgrid.InputSchemaCloudEventSchemaV10),
					string(eventgrid.InputSchemaCustomEventSchema),
					string(eventgrid.InputSchemaEventGridSchema),
				}, false),
			},

			"input_mapping_fields": {
				Type:     schema.TypeList,
				Optional: true,
				MaxItems: 1,
				ForceNew: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"id": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"topic": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"event_time": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"event_type": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"subject": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"data_version": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
					},
				},
			},

			"input_mapping_default_values": {
				Type:     schema.TypeList,
				Optional: true,
				MaxItems: 1,
				ForceNew: true,
				Elem: &schema.Resource{
					Schema: map[string]*schema.Schema{
						"event_type": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"subject": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
						"data_version": {
							Type:     schema.TypeString,
							ForceNew: true,
							Optional: true,
						},
					},
				},
			},

			"endpoint": {
				Type:     schema.TypeString,
				Computed: true,
			},

			"primary_access_key": {
				Type:      schema.TypeString,
				Computed:  true,
				Sensitive: true,
			},

			"secondary_access_key": {
				Type:      schema.TypeString,
				Computed:  true,
				Sensitive: true,
			},

			"tags": tags.Schema(),
		},
	}
}

func resourceArmEventGridTopicCreateUpdate(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*clients.Client).EventGrid.TopicsClient
	ctx, cancel := timeouts.ForCreateUpdate(meta.(*clients.Client).StopContext, d)
	defer cancel()

	name := d.Get("name").(string)
	resourceGroup := d.Get("resource_group_name").(string)

	if features.ShouldResourcesBeImported() && d.IsNewResource() {
		existing, err := client.Get(ctx, resourceGroup, name)
		if err != nil {
			if !utils.ResponseWasNotFound(existing.Response) {
				return fmt.Errorf("Error checking for presence of existing EventGrid Topic %q (Resource Group %q): %s", name, resourceGroup, err)
			}
		}

		if existing.ID != nil && *existing.ID != "" {
			return tf.ImportAsExistsError("azurerm_eventgrid_topic", *existing.ID)
		}
	}

	location := azure.NormalizeLocation(d.Get("location").(string))
	t := d.Get("tags").(map[string]interface{})

	topicProperties := &eventgrid.TopicProperties{
		InputSchemaMapping: expandAzureRmEventgridTopicInputMapping(d),
		InputSchema:        eventgrid.InputSchema(d.Get("input_schema").(string)),
	}

	properties := eventgrid.Topic{
		Location:        &location,
		TopicProperties: topicProperties,
		Tags:            tags.Expand(t),
	}

	log.Printf("[INFO] preparing arguments for AzureRM EventGrid Topic creation with Properties: %+v.", properties)

	future, err := client.CreateOrUpdate(ctx, resourceGroup, name, properties)
	if err != nil {
		return err
	}

	if err = future.WaitForCompletionRef(ctx, client.Client); err != nil {
		return err
	}

	read, err := client.Get(ctx, resourceGroup, name)
	if err != nil {
		return err
	}
	if read.ID == nil {
		return fmt.Errorf("Cannot read EventGrid Topic %s (resource group %s) ID", name, resourceGroup)
	}

	d.SetId(*read.ID)

	return resourceArmEventGridTopicRead(d, meta)
}

func resourceArmEventGridTopicRead(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*clients.Client).EventGrid.TopicsClient
	ctx, cancel := timeouts.ForRead(meta.(*clients.Client).StopContext, d)
	defer cancel()

	id, err := parse.EventGridTopicID(d.Id())
	if err != nil {
		return err
	}

	resp, err := client.Get(ctx, id.ResourceGroup, id.Name)
	if err != nil {
		if utils.ResponseWasNotFound(resp.Response) {
			log.Printf("[WARN] EventGrid Topic '%s' was not found (resource group '%s')", id.Name, id.ResourceGroup)
			d.SetId("")
			return nil
		}

		return fmt.Errorf("Error making Read request on EventGrid Topic '%s': %+v", id.Name, err)
	}
	if props := resp.TopicProperties; props != nil {
		d.Set("endpoint", props.Endpoint)

		d.Set("input_schema", string(props.InputSchema))

		inputMappingFields, err := flattenAzureRmEventgridTopicInputMapping(props.InputSchemaMapping)
		if err != nil {
			return fmt.Errorf("Unable to flatten `input_schema_mapping_fields` for EventGrid Topic %q (Resource Group %q): %s", id.Name, id.ResourceGroup, err)
		}
		if err := d.Set("input_mapping_fields", inputMappingFields); err != nil {
			return fmt.Errorf("Error setting `input_schema_mapping_fields` for EventGrid Topic %q (Resource Group %q): %s", id.Name, id.ResourceGroup, err)
		}

		inputMappingDefaultValues, err := flattenAzureRmEventgridTopicInputMappingDefaultValues(props.InputSchemaMapping)
		if err != nil {
			return fmt.Errorf("Unable to flatten `input_schema_mapping_default_values` for EventGrid Topic %q (Resource Group %q): %s", id.Name, id.ResourceGroup, err)
		}
		if err := d.Set("input_mapping_default_values", inputMappingDefaultValues); err != nil {
			return fmt.Errorf("Error setting `input_schema_mapping_fields` for EventGrid Topic %q (Resource Group %q): %s", id.Name, id.ResourceGroup, err)
		}
	}

	keys, err := client.ListSharedAccessKeys(ctx, id.ResourceGroup, id.Name)
	if err != nil {
		return fmt.Errorf("Error retrieving Shared Access Keys for EventGrid Topic '%s': %+v", id.Name, err)
	}

	d.Set("name", resp.Name)
	d.Set("resource_group_name", id.ResourceGroup)
	if location := resp.Location; location != nil {
		d.Set("location", azure.NormalizeLocation(*location))
	}

	if props := resp.TopicProperties; props != nil {
		d.Set("endpoint", props.Endpoint)
	}

	d.Set("primary_access_key", keys.Key1)
	d.Set("secondary_access_key", keys.Key2)

	return tags.FlattenAndSet(d, resp.Tags)
}

func resourceArmEventGridTopicDelete(d *schema.ResourceData, meta interface{}) error {
	client := meta.(*clients.Client).EventGrid.TopicsClient
	ctx, cancel := timeouts.ForDelete(meta.(*clients.Client).StopContext, d)
	defer cancel()

	id, err := parse.EventGridTopicID(d.Id())
	if err != nil {
		return err
	}

	future, err := client.Delete(ctx, id.ResourceGroup, id.Name)
	if err != nil {
		if response.WasNotFound(future.Response()) {
			return nil
		}
		return fmt.Errorf("Error deleting EventGrid Topic %q: %+v", id.Name, err)
	}

	if err = future.WaitForCompletionRef(ctx, client.Client); err != nil {
		if response.WasNotFound(future.Response()) {
			return nil
		}
		return fmt.Errorf("Error deleting EventGrid Topic %q: %+v", id.Name, err)
	}

	return nil
}

func expandAzureRmEventgridTopicInputMapping(d *schema.ResourceData) *eventgrid.JSONInputSchemaMapping {
	imf, imfok := d.GetOk("input_mapping_fields")

	imdv, imdvok := d.GetOk("input_mapping_default_values")

	if !imfok && !imdvok {
		return nil
	}

	jismp := eventgrid.JSONInputSchemaMappingProperties{}

	if imfok {
		mappings := imf.([]interface{})
		if len(mappings) > 0 && mappings[0] != nil {
			if mapping := mappings[0].(map[string]interface{}); mapping != nil {
				if id := mapping["id"].(string); id != "" {
					jismp.ID = &eventgrid.JSONField{SourceField: &id}
				}

				if eventTime := mapping["event_time"].(string); eventTime != "" {
					jismp.EventTime = &eventgrid.JSONField{SourceField: &eventTime}
				}

				if topic := mapping["topic"].(string); topic != "" {
					jismp.Topic = &eventgrid.JSONField{SourceField: &topic}
				}

				if dataVersion := mapping["data_version"].(string); dataVersion != "" {
					jismp.DataVersion = &eventgrid.JSONFieldWithDefault{SourceField: &dataVersion}
				}

				if subject := mapping["subject"].(string); subject != "" {
					jismp.Subject = &eventgrid.JSONFieldWithDefault{SourceField: &subject}
				}

				if eventType := mapping["event_type"].(string); eventType != "" {
					jismp.EventType = &eventgrid.JSONFieldWithDefault{SourceField: &eventType}
				}
			}
		}
	}

	if imdvok {
		mappings := imdv.([]interface{})
		if len(mappings) > 0 && mappings[0] != nil {
			if mapping := mappings[0].(map[string]interface{}); mapping != nil {
				if dataVersion := mapping["data_version"].(string); dataVersion != "" {
					jismp.DataVersion = &eventgrid.JSONFieldWithDefault{DefaultValue: &dataVersion}
				}

				if subject := mapping["subject"].(string); subject != "" {
					jismp.Subject = &eventgrid.JSONFieldWithDefault{DefaultValue: &subject}
				}

				if eventType := mapping["event_type"].(string); eventType != "" {
					jismp.EventType = &eventgrid.JSONFieldWithDefault{DefaultValue: &eventType}
				}
			}
		}
	}

	jsonMapping := eventgrid.JSONInputSchemaMapping{
		JSONInputSchemaMappingProperties: &jismp,
		InputSchemaMappingType:           eventgrid.InputSchemaMappingTypeJSON,
	}

	return &jsonMapping
}

func flattenAzureRmEventgridTopicInputMapping(input eventgrid.BasicInputSchemaMapping) ([]interface{}, error) {
	if input == nil {
		return nil, nil
	}
	result := make(map[string]interface{})

	jsonValues, ok := input.(eventgrid.JSONInputSchemaMapping)
	if !ok {
		return nil, fmt.Errorf("Unable to read JSONInputSchemaMapping")
	}
	props := jsonValues.JSONInputSchemaMappingProperties

	if props.EventTime != nil && props.EventTime.SourceField != nil {
		result["event_time"] = *props.EventTime.SourceField
	}

	if props.ID != nil && props.ID.SourceField != nil {
		result["id"] = *props.ID.SourceField
	}

	if props.Topic != nil && props.Topic.SourceField != nil {
		result["topic"] = *props.Topic.SourceField
	}

	if props.DataVersion != nil && props.DataVersion.SourceField != nil {
		result["data_version"] = *props.DataVersion.SourceField
	}

	if props.EventType != nil && props.EventType.SourceField != nil {
		result["event_type"] = *props.EventType.SourceField
	}

	if props.Subject != nil && props.Subject.SourceField != nil {
		result["subject"] = *props.Subject.SourceField
	}

	return []interface{}{result}, nil
}

func flattenAzureRmEventgridTopicInputMappingDefaultValues(input eventgrid.BasicInputSchemaMapping) ([]interface{}, error) {
	if input == nil {
		return nil, nil
	}
	result := make(map[string]interface{})

	jsonValues, ok := input.(eventgrid.JSONInputSchemaMapping)
	if !ok {
		return nil, fmt.Errorf("Unable to read JSONInputSchemaMapping")
	}
	props := jsonValues.JSONInputSchemaMappingProperties

	if props.DataVersion != nil && props.DataVersion.DefaultValue != nil {
		result["data_version"] = *props.DataVersion.DefaultValue
	}

	if props.EventType != nil && props.EventType.DefaultValue != nil {
		result["event_type"] = *props.EventType.DefaultValue
	}

	if props.Subject != nil && props.Subject.DefaultValue != nil {
		result["subject"] = *props.Subject.DefaultValue
	}

	return []interface{}{result}, nil
}