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dataset.go
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dataset.go
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package domoapi
import (
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"time"
)
type RequestHandlerService interface {
Handler(req *http.Request) (*http.Response, error)
}
type RequestHandler struct{}
type DomoAPI struct {
requestHandlerService RequestHandlerService
}
func NewDomoAPI() *DomoAPI {
return &DomoAPI{
requestHandlerService: &RequestHandler{},
}
}
type Token struct {
AccessToken string `json:"access_token,omitempty"`
ExpiresIn int `json:"expires_in,omitempty"`
ExpiresAt time.Time
}
//DomoDataset
type DomoDataset struct {
ID string `json:"id,omitempty"`
Name string `json:"name,omitempty"`
Description string `json:"description,omitempty"`
Rows int `json:"rows,omitempty"`
Columns int `json:"columns,omitempty"`
Schema *Schema `json:"schema,omitempty"`
Owner *Owner `json:"owner,omitempty"`
CreatedAt *time.Time `json:"createdAt,omitempty"`
UpdatedAt *time.Time `json:"updatedAt,omitempty"`
}
//Owner is domo dataset's owner
type Owner struct {
ID int64 `json:"id,omitempty"`
Name string `json:"name,omitempty"`
}
//Schema is data's schema
type Schema struct {
Columns []Column `json:"columns,omitempty"`
}
//Column is schema's column
type Column struct {
Type string `json:"type,omitempty"`
Name string `json:"name,omitempty"`
}
//GetDataByDatasetID fetch data given domo's datasetID. Use header=true to include header in the response
func (d *DomoAPI) GetDataByDatasetID(token string, datasetID string, header bool) (string, error) {
includeHeader := ""
if header {
includeHeader = "?includeHeader=true"
}
apiURL := os.Getenv("DOMO_API_URL") + "/v1/datasets/" + datasetID + "/data" + includeHeader
req, err := http.NewRequest(http.MethodGet, apiURL, nil)
if err != nil {
return "", err
}
req.Header.Add("Content-Type", "text/csv")
req.Header.Add("Authorization", "bearer "+token)
resp, err := d.requestHandlerService.Handler(req)
if err != nil {
return "", err
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("Api request failed : %v", string(body))
}
return string(body), nil
}
//GetDatasetIDByName get domo datasetID using domo dataset name
func (d *DomoAPI) GetDatasetIDByName(datasetName string, token string) ([]string, error) {
var datasetIDs []string
datasets, err := d.ListDatasets(token)
if err != nil {
return nil, err
}
for _, d := range datasets {
if d.Name == datasetName {
datasetIDs = append(datasetIDs, d.ID)
}
}
if len(datasetIDs) > 0 {
return datasetIDs, nil
}
return nil, nil
}
//ListDatasets list all domo datasets in the belonging domo instance
func (d *DomoAPI) ListDatasets(token string) ([]DomoDataset, error) {
var dataSets []DomoDataset
var tmpSets []DomoDataset
limit := 50
counter := 1
for counter >= 1 {
strOffset := fmt.Sprintf("&offset=%d", (counter-1)*limit)
strLimit := fmt.Sprintf("&limit=%d", limit)
apiURL := os.Getenv("DOMO_API_URL") + "/v1/datasets?sort=name" + strLimit + strOffset
req, err := http.NewRequest(http.MethodGet, apiURL, nil)
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Authorization", "bearer "+token)
resp, err := d.requestHandlerService.Handler(req)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("Domo api resoonseded with erorr: %d", resp.StatusCode)
}
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
if err := json.Unmarshal(body, &tmpSets); err != nil {
return nil, fmt.Errorf("Cannot parse json : %v", err)
}
dataSets = append(dataSets, tmpSets...)
counter++
if len(tmpSets) == 0 {
break
}
}
return dataSets, nil
}
//AddDataToDataset adds data to the given dataset. Use replace=true to reset dataset's data with the given data.
func (d *DomoAPI) AddDataToDataset(datasetID string, data string, replace bool, token string) error {
if datasetID == "" {
return fmt.Errorf(" error : issing datasetID")
}
method := "APPEND"
if replace {
method = "REPLACE"
}
apiURL := os.Getenv("DOMO_API_URL") + "/v1/datasets/" + datasetID + "/data?updateMethod=" + method
req, err := http.NewRequest(http.MethodPut, apiURL, bytes.NewBuffer([]byte(data)))
if err != nil {
return err
}
req.Header.Add("Content-Type", "text/csv")
req.Header.Add("Authorization", "bearer "+token)
resp, err := d.requestHandlerService.Handler(req)
if resp.StatusCode != http.StatusNoContent {
return fmt.Errorf("Domo api resonseded with erorr: %d \n URL: %s", resp.StatusCode, apiURL)
}
return err
}
//CreateDataset create dataset on domo instance
func (d *DomoAPI) CreateDataset(dds DomoDataset, token string) (*DomoDataset, error) {
apiURL := os.Getenv("DOMO_API_URL") + "/v1/datasets"
sDataset, err := json.Marshal(dds)
if err != nil {
return nil, err
}
req, err := http.NewRequest(http.MethodPost, apiURL, bytes.NewBuffer(sDataset))
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("Authorization", "bearer "+token)
resp, err := d.requestHandlerService.Handler(req)
if err != nil {
return nil, err
}
if resp.StatusCode != http.StatusCreated {
return nil, fmt.Errorf("Error creating dataset: %s", string(sDataset))
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
var s *DomoDataset
if err := json.Unmarshal(body, &s); err != nil {
return nil, fmt.Errorf("Error deserializing dataset schema - %v", err)
}
return s, err
}
//CreateAccessToken create domo accessToken using key clientKey and clientSecrete in .env file.
func (d *DomoAPI) CreateAccessToken() (*Token, error) {
scopes := os.Getenv("DOMO_AUTH_SCOPE")
if scopes == "" {
scopes = "data"
}
apiURL := os.Getenv("DOMO_API_URL") + "/oauth/token?grant_type=client_credentials&scope=" + scopes
req, err := http.NewRequest(http.MethodGet, apiURL, nil)
if err != nil {
return nil, err
}
clientID := os.Getenv("DOMO_CLIENT_ID")
clientSecret := os.Getenv("DOMO_CLIENT_SECRET")
req.SetBasicAuth(clientID, clientSecret)
resp, err := d.requestHandlerService.Handler(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, fmt.Errorf("Error reading response body request - %v", err)
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("Expected status 2XX getting oauth access_token, got %d %s - %s", resp.StatusCode, resp.Status, string(body))
}
var token *Token
if err := json.Unmarshal(body, &token); err != nil {
return nil, fmt.Errorf("Error deserializing access_token - %v", err)
}
if token.AccessToken == "" {
return nil, fmt.Errorf("error: invalid accesstoken")
}
token.ExpiresAt = time.Now().Add(time.Duration(token.ExpiresIn-1) * time.Second)
return token, nil
}
//Handler handles http client request.
func (r *RequestHandler) Handler(req *http.Request) (*http.Response, error) {
var client *http.Client
proxyURL := os.Getenv("DOMO_PROXY_URL")
if proxyURL != "" {
proxy, _ := url.Parse(proxyURL)
transport := &http.Transport{Proxy: http.ProxyURL(proxy)}
client = &http.Client{
Transport: transport,
Timeout: 3 * time.Minute,
}
} else {
client = &http.Client{
Timeout: 3 * time.Minute,
}
}
return client.Do(req)
}