dapr_api/state/state.go

package state

import (
	"encoding/json"
	"fmt"
	resty "github.com/go-resty/resty/v2"
	"time"
)

const (
	saveUrlFormat        = "http://localhost:%d/v1.0/state/%s"
	getUrlFormat         = "http://localhost:%d/v1.0/state/%s/%s"
	getBulkUrlFormat     = "http://localhost:%d/v1.0/state/%s/bulk"
	deleteUrlFormat      = "http://localhost:%d/v1.0/state/%s/%s"
	transactionUrlFormat = "http://localhost:%d/v1.0/state/%s/transaction"
)

type API struct {
	port   int
	client *resty.Client
}

func NewAPI(port int, timeout time.Duration) *API {
	return &API{
		port:   port,
		client: resty.New().SetTimeout(timeout),
	}
}

func DestroyAPI(api *API) {
	if api == nil {
		return
	}

	api.port = 0
	api.client = nil
}

func (api *API) SaveState(storeName string, request []SaveStateRequest) error {
	saveUrl := fmt.Sprintf(saveUrlFormat, api.port, storeName)

	resp, err := api.client.R().
		SetHeader("Content-Type", "application/json").
		SetBody(request).
		Post(saveUrl)
	if err != nil {
		return err
	}

	if resp.IsError() {
		return fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	return nil
}

func (api *API) GetState(storeName string, key string, queryParams map[string]string, result interface{}) (string, error) {
	getUrl := fmt.Sprintf(getUrlFormat, api.port, storeName, key)

	resp, err := api.client.R().
		SetQueryParams(queryParams).
		SetResult(result).
		Get(getUrl)
	if err != nil {
		return "", err
	}

	if resp.IsError() {
		return "", fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	return resp.Header().Get("Etag"), nil
}

func (api *API) GetStateBulk(storeName string, queryParams map[string]string, request GetStateBulkRequest) ([]GetStateBulkItem, error) {
	getBulkUrl := fmt.Sprintf(getBulkUrlFormat, api.port, storeName)

	resp, err := api.client.R().
		SetQueryParams(queryParams).
		SetBody(request).
		Post(getBulkUrl)
	if err != nil {
		return nil, err
	}

	if resp.IsError() {
		return nil, fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	items := make([]GetStateBulkItem, 0)
	if resp.Body() != nil && len(resp.Body()) != 0 {
		err = json.Unmarshal(resp.Body(), &items)
		if err != nil {
			return nil, err
		}
	}

	return items, nil
}

func (api *API) DeleteState(storeName string, key string, queryParams map[string]string) error {
	deleteUrl := fmt.Sprintf(deleteUrlFormat, api.port, storeName, key)

	resp, err := api.client.R().
		SetQueryParams(queryParams).
		Delete(deleteUrl)
	if err != nil {
		return err
	}

	if resp.IsError() {
		return fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	return nil
}

func (api *API) Transaction(storeName string, request TransactionRequest) error {
	transactionUrl := fmt.Sprintf(transactionUrlFormat, api.port, storeName)

	resp, err := api.client.R().
		SetHeader("Content-Type", "application/json").
		SetBody(request).
		Post(transactionUrl)
	if err != nil {
		return err
	}

	if resp.IsError() {
		return fmt.Errorf("Status %d: %s\n", resp.StatusCode(), resp.Body())
	}

	return nil
}