Add code for ViNS data source provider, phase 1

decort/utility_vins.go

@@ -0,0 +1,136 @@
+/*
+Copyright (c) 2020-2021 Digital Energy Cloud Solutions LLC. All Rights Reserved.
+Author: Sergey Shubin, <sergey.shubin@digitalenergy.online>, <svs1370@gmail.com>
+
+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.
+*/
+
+/*
+This file is part of Terraform (by Hashicorp) provider for Digital Energy Cloud Orchestration
+Technology platfom.
+
+Visit https://github.com/rudecs/terraform-provider-decort for full source code package and updates.
+*/
+
+package decort
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/url"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/hashicorp/terraform-plugin-sdk/helper/schema"
+)
+
+func (ctrl *ControllerCfg) utilityVinsConfigGet(vinsid int) (*VinsRecord, error) {
+	urlValues := &url.Values{}
+	urlValues.Add("vinsId", fmt.Sprintf("%d", vinsid))
+	vinsFacts, err := ctrl.decortAPICall("POST", VinsGetAPI, urlValues)
+	if err != nil {
+		return nil, err
+	}
+
+	log.Debugf("utilityVinsConfigGet: ready to unmarshal string %q", vinsFacts)
+	model := &VinsRecord{}
+	err = json.Unmarshal([]byte(vinsFacts), model)
+	if err != nil {
+		return nil, err
+	}
+
+	log.Debugf("utilityVinsConfigGet: Name %d, account name:ID %s:%d, RG Name:ID %s:%d",
+		model.Name, model.AccountName, model.AccountID, 
+		model.RgName, model.RgID)
+
+	return model, nil
+}
+
+// On success this function returns a string, as returned by API vins/get, which could be unmarshalled
+// into VinsGetResp structure
+func utilityVinsCheckPresence(d *schema.ResourceData, m interface{}) (string, error) {
+	// This function tries to locate ViNS by one of the following algorithms depending
+	// on the parameters passed:
+	//    - if resource group ID is specified -> it looks for a ViNS at the RG level
+	//    - if account ID is specifeid -> it looks for a ViNS at the account level
+	//
+	// If succeeded, it returns non empty string that contains JSON formatted facts about the
+	// ViNS as returned by vins/get API call.
+	// Otherwise it returns empty string and a meaningful error.
+	//
+	// This function does not modify its ResourceData argument, so it is safe to use it as core
+	// method for the Terraform resource Exists method.
+	//
+
+	controller := m.(*ControllerCfg)
+	urlValues := &url.Values{}
+
+	vinsName, argSet := d.GetOk("name")
+	if !argSet {
+		// if ViNS name is not set. then we cannot locate ViNS
+		return "", fmt.Errorf("Cannot check ViNS presence if ViNS name is empty")
+	}
+	urlValues.Add("name", vinsName.(string))
+	log.Debugf("utilityVinsCheckPresence: locating ViNS %s", vinsName.(string))
+
+	rgId, rgSet := d.GetOk("rg_id")
+	if rgSet {
+		log.Debugf("utilityVinsCheckPresence: limiting ViNS t search to RG ID %d", rgId.(int))
+		urlValues.Add("rgId", fmt.Sprintf("%d", rgId.(int)))
+	}
+
+	accountId, accountSet := d.GetOk("account_id")
+	if accountSet {
+		log.Debugf("utilityVinsCheckPresence: limiting ViNS search to Account ID %d", accountId.(int))
+		urlValues.Add("accountId", fmt.Sprintf("%d", accountId.(int)))
+	}
+
+	apiResp, err := controller.decortAPICall("POST", VinsSearchAPI, urlValues)
+	if err != nil {
+		return "", err
+	}
+	
+	// log.Debugf("%s", apiResp)
+	// log.Debugf("utilityResgroupCheckPresence: ready to decode response body from %s", VinsSearchAPI)
+	model := VinsSearchResp{}
+	err = json.Unmarshal([]byte(apiResp), &model)
+	if err != nil {
+		return "", err
+	}
+
+	log.Debugf("utilityVinsCheckPresence: traversing decoded Json of length %d", len(model))
+	for index, item := range model {
+		if item.Name == vinsName.(string) {
+			if ( accountSet && item.AccountID != accountId.(int) ) || 
+			   ( rgSet && item.RgID != rgId.(int) ) {
+				   // double check that account ID and Rg ID match, if set in the schema
+				   continue
+			}
+
+			log.Debugf("utilityVinsCheckPresence: match ViNS name %s / ID %d, account ID %d, RG ID %d at index %d",
+				       item.Name, item.ID, item.AccountID, item.RgID, index)
+
+			// element returned by API vins/search does not contain all information we may need to 
+			// manage ViNS, so we have to get detailed info by calling API vins/get
+			rqValues := &url.Values{}
+			rqValues.Add("vinsId", fmt.Sprintf("%d",item.ID))
+			apiResp, err = controller.decortAPICall("POST", VinsGetAPI, rqValues)
+			if err != nil {
+				return "", err
+			}
+			return apiResp, nil 
+		}
+	}
+
+	return "", fmt.Errorf("Cannot find ViNS name %s. Check name and/or RG ID & Account ID", vinsName.(string))
+}