/
request.go
213 lines (180 loc) · 6.23 KB
/
request.go
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package salesforce
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
)
type TokenGetter interface {
Get(ctx context.Context) (string, error)
}
type HttpClient interface {
Do(req *http.Request) (*http.Response, error)
}
// RequestHelper a helper struct for sending requests to salesforce
// for more on this see https://ellogroup.atlassian.net/wiki/spaces/EP/pages/13402137/Salesforce+Package
type RequestHelper struct {
tokenGetter TokenGetter
client HttpClient
baseUrl string
apiVersion int
}
func NewRequestHelper(client HttpClient, tg TokenGetter, baseUrl string, apiVersion int) (*RequestHelper, error) {
if len(baseUrl) == 0 {
return nil, fmt.Errorf("baseUrl needs to be provided")
}
if apiVersion <= 0 {
return nil, fmt.Errorf("salesfore apiVersion needs to be provided")
}
if tg == nil {
return nil, fmt.Errorf("tokenGetter needs to be provided")
}
return &RequestHelper{
tokenGetter: tg,
client: client,
baseUrl: baseUrl,
apiVersion: apiVersion,
}, nil
}
type QueryError struct {
queryUsed string
statusCode int
}
func (q QueryError) Error() string {
return fmt.Sprintf("error querying salesforce - status code: %v, query: %v", q.statusCode, q.queryUsed)
}
// Query salesforce in a generic way
// - uses the baseUrl, tokenGetter and http client on RequestHelper to query salesforce
// - QueryError returned if status code != 200 with status code of response
func Query[E any](ctx context.Context, h *RequestHelper, q string) (*QueryResponse[E], error) {
reqUrl := fmt.Sprintf("%s/services/data/v%d.0/query?q=%s", h.baseUrl, h.apiVersion, url.QueryEscape(q))
req, err := http.NewRequest(http.MethodGet, reqUrl, nil)
if err != nil {
return nil, fmt.Errorf("unable to create salesforce request: %w", err)
}
token, err := h.tokenGetter.Get(ctx)
if err != nil {
return nil, fmt.Errorf("unable to create salesforce auth token: %w", err)
}
req.Header = http.Header{
"Content-Type": {"application/json"},
"Authorization": {"Bearer " + token},
}
resp, err := h.client.Do(req)
if err != nil {
return nil, fmt.Errorf("unable to send request to salesforce: %w", err)
}
if resp.StatusCode != 200 {
return nil, QueryError{statusCode: resp.StatusCode, queryUsed: q}
}
resBody, err := io.ReadAll(resp.Body)
if err != nil {
return nil, err
}
defer resp.Body.Close()
var parsedResp *QueryResponse[E]
if err = json.Unmarshal(resBody, &parsedResp); err != nil {
return nil, err
}
return parsedResp, nil
}
// Post sends a post request to salesforce to create an object
// - uses the baseUrl, tokenGetter and http client on RequestHelper
// - returns the id of the newly created object
func Post(ctx context.Context, h *RequestHelper, name string, record any) (string, error) {
reqUrl := fmt.Sprintf("%s/services/data/v%d.0/sobjects/%s", h.baseUrl, h.apiVersion, name)
reqBody, err := json.Marshal(record)
if err != nil {
return "", fmt.Errorf("unable to create salesforce payload: %w", err)
}
req, err := http.NewRequest(http.MethodPost, reqUrl, bytes.NewReader(reqBody))
if err != nil {
return "", fmt.Errorf("unable to create salesforce request: %w", err)
}
token, err := h.tokenGetter.Get(ctx)
if err != nil {
return "", fmt.Errorf("unable to create salesforce auth token: %w", err)
}
req.Header = http.Header{
"Content-Type": {"application/json"},
"Authorization": {"Bearer " + token},
}
resp, err := h.client.Do(req)
if err != nil {
return "", fmt.Errorf("unable to send request to salesforce: %w", err)
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
return "", fmt.Errorf("unexpected salesforce response code: %d", resp.StatusCode)
}
resBody, err := io.ReadAll(resp.Body)
if err != nil {
return "", fmt.Errorf("unable to parse response body: %w", err)
}
defer resp.Body.Close()
var parsedResp *PostResponse
if err = json.Unmarshal(resBody, &parsedResp); err != nil {
return "", err
}
if !parsedResp.Success {
return "", fmt.Errorf("salesforce returns a failure result: %s", resBody)
}
return parsedResp.Id, nil
}
// Patch sends a patch request to salesforce to update an object
// - uses the baseUrl, tokenGetter and http client on RequestHelper to query salesforce
// - returns the status code in the response, as patch requests could result in 200, 201 or 204
func Patch(ctx context.Context, h *RequestHelper, name, id string, record any) (int, error) {
reqUrl := fmt.Sprintf("%s/services/data/v%d.0/sobjects/%s/%s", h.baseUrl, h.apiVersion, name, id)
reqBody, err := json.Marshal(record)
if err != nil {
return 0, fmt.Errorf("unable to create salesforce payload: %w", err)
}
req, err := http.NewRequest(http.MethodPatch, reqUrl, bytes.NewReader(reqBody))
if err != nil {
return 0, fmt.Errorf("unable to create salesforce request: %w", err)
}
token, err := h.tokenGetter.Get(ctx)
if err != nil {
return 0, fmt.Errorf("unable to create salesforce auth token: %w", err)
}
req.Header = http.Header{
"Content-Type": {"application/json"},
"Authorization": {"Bearer " + token},
}
resp, err := h.client.Do(req)
if err != nil {
return 0, fmt.Errorf("unable to send request to salesforce: %w", err)
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
return resp.StatusCode, fmt.Errorf("unexpected salesforce response code: %d", resp.StatusCode)
}
return resp.StatusCode, nil
}
// Delete sends a delete request to salesforce to delete an object
// - uses the baseUrl, tokenGetter and http client on RequestHelper
func Delete(ctx context.Context, h *RequestHelper, name, id string) error {
reqUrl := fmt.Sprintf("%s/services/data/v%d.0/sobjects/%s/%s", h.baseUrl, h.apiVersion, name, id)
req, err := http.NewRequest(http.MethodDelete, reqUrl, nil)
if err != nil {
return fmt.Errorf("unable to create salesforce request: %w", err)
}
token, err := h.tokenGetter.Get(ctx)
if err != nil {
return fmt.Errorf("unable to create salesforce auth token: %w", err)
}
req.Header = http.Header{
"Content-Type": {"application/json"},
"Authorization": {"Bearer " + token},
}
resp, err := h.client.Do(req)
if err != nil {
return fmt.Errorf("unable to send request to salesforce: %w", err)
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
return fmt.Errorf("unexpected salesforce response code: %d", resp.StatusCode)
}
return nil
}