data_source_nsxt_logical_tier1_router.go

/* Copyright © 2018 VMware, Inc. All Rights Reserved.
   SPDX-License-Identifier: MPL-2.0 */

package nsxt

import (
	"fmt"
	"strings"

	"net/http"

	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
	"github.com/vmware/go-vmware-nsxt/manager"
)

func dataSourceNsxtLogicalTier1Router() *schema.Resource {
	return &schema.Resource{
		Read:               dataSourceNsxtLogicalTier1RouterRead,
		DeprecationMessage: mpObjectDataSourceDeprecationMessage,
		Schema: map[string]*schema.Schema{
			"id": {
				Type:        schema.TypeString,
				Description: "Unique ID of this resource",
				Optional:    true,
				Computed:    true,
			},
			"display_name": {
				Type:        schema.TypeString,
				Description: "The display name of this resource",
				Optional:    true,
				Computed:    true,
			},
			"description": {
				Type:        schema.TypeString,
				Description: "Description of this resource",
				Optional:    true,
				Computed:    true,
			},
			"edge_cluster_id": {
				Type:        schema.TypeString,
				Description: "The ID of the edge cluster connected to this router",
				Optional:    true,
				Computed:    true,
			},
		},
	}
}

func dataSourceNsxtLogicalTier1RouterRead(d *schema.ResourceData, m interface{}) error {
	// Read a logical tier1 router by name or id
	nsxClient := m.(nsxtClients).NsxtClient
	if nsxClient == nil {
		return dataSourceNotSupportedError()
	}

	objID := d.Get("id").(string)
	objName := d.Get("display_name").(string)
	var obj manager.LogicalRouter
	if objID != "" {
		// Get by id
		objGet, resp, err := nsxClient.LogicalRoutingAndServicesApi.ReadLogicalRouter(nsxClient.Context, objID)

		if resp != nil && resp.StatusCode == http.StatusNotFound {
			return fmt.Errorf("Logical tier1 router %s was not found", objID)
		}
		if err != nil {
			return fmt.Errorf("Error while reading logical tier1 router %s: %v", objID, err)
		}
		if objGet.RouterType != "TIER1" {
			return fmt.Errorf("Logical router %s is not a tier1 router", objID)
		}
		obj = objGet
	} else if objName == "" {
		return fmt.Errorf("Error obtaining logical tier1 router ID or name during read")
	} else {
		// Get by full name/prefix
		var perfectMatch []manager.LogicalRouter
		var prefixMatch []manager.LogicalRouter
		lister := func(info *paginationInfo) error {
			objList, _, err := nsxClient.LogicalRoutingAndServicesApi.ListLogicalRouters(nsxClient.Context, info.LocalVarOptionals)
			if err != nil {
				return fmt.Errorf("Error while reading logical tier1 routers: %v", err)
			}

			info.PageCount = int64(len(objList.Results))
			info.TotalCount = objList.ResultCount
			info.Cursor = objList.Cursor

			// go over the list to find the correct one (prefer a perfect match. If not - prefix match)
			for _, objInList := range objList.Results {
				if objInList.RouterType == "TIER1" {
					if strings.HasPrefix(objInList.DisplayName, objName) {
						prefixMatch = append(prefixMatch, objInList)
					}
					if objInList.DisplayName == objName {
						perfectMatch = append(perfectMatch, objInList)
					}
				}
			}
			return nil
		}

		total, err := handlePagination(lister)
		if err != nil {
			return err
		}

		if len(perfectMatch) > 0 {
			if len(perfectMatch) > 1 {
				return fmt.Errorf("Found multiple logical tier1 routers with name '%s'", objName)
			}
			obj = perfectMatch[0]
		} else if len(prefixMatch) > 0 {
			if len(prefixMatch) > 1 {
				return fmt.Errorf("Found multiple logical tier1 routers with name starting with '%s'", objName)
			}
			obj = prefixMatch[0]
		} else {
			return fmt.Errorf("Logical tier1 router with name '%s' was not found among %d objects", objName, total)
		}
	}

	d.SetId(obj.Id)
	d.Set("display_name", obj.DisplayName)
	d.Set("description", obj.Description)
	d.Set("edge_cluster_id", obj.EdgeClusterId)

	return nil
}