Add custom transport to api client

api.go

@@ -2,9 +2,8 @@ package twitch
 
 import (
 	"go.fifitido.net/twitch/api"
-	"go.fifitido.net/twitch/auth"
 )
 
-func NewAPI(authClient *auth.Client) *api.API {
-	return api.NewDefault(authClient)
+func NewAPI(clientId, clientSecret, redirectUri string) *api.API {
+	return api.NewDefault(clientId, clientSecret, redirectUri)
 }

api/api.go

@@ -41,7 +41,7 @@ const HelixBaseUrl = "https://api.twitch.tv/helix"
 type API struct {
 	client  *http.Client
 	baseUrl *url.URL
-	authClient *auth.Client
+	Auth    *auth.Client
 
 	Ads           *ads.Ads
 	Analytics     *analytics.Analytics
@@ -77,7 +77,7 @@ func New(client *http.Client, baseUrl *url.URL, authClient *auth.Client) *API {
 	return &API{
 		client:  client,
 		baseUrl: baseUrl,
-		authClient: authClient,
+		Auth:    authClient,
 
 		Ads:           ads.New(client, baseUrl),
 		Analytics:     analytics.New(client, baseUrl),
@@ -110,21 +110,26 @@ func New(client *http.Client, baseUrl *url.URL, authClient *auth.Client) *API {
 	}
 }
 
-func NewDefault(authClient *auth.Client) *API {
-	client := &http.Client{}
+func NewDefault(clientId, clientSecret, redirectUri string) *API {
+	client := &http.Client{
+		Transport: &apiTransport{
+			clientId: clientId,
+		},
+	}
 	baseUrl, _ := url.Parse(HelixBaseUrl)
+	authClient := auth.NewClient(clientId, clientSecret, redirectUri)
 
 	return New(client, baseUrl, authClient)
 }
 
 func (a *API) WithClient(client *http.Client) *API {
-	return New(client, a.baseUrl, a.authClient)
+	return New(client, a.baseUrl, a.Auth)
 }
 
 func (a *API) WithAuthToken(token *auth.Token) *API {
 	return a.WithClient(&http.Client{
 		Transport: &oauth2.Transport{
-			Source: a.authClient.TokenSource(token),
+			Source: a.Auth.TokenSource(token),
 			Base:   a.client.Transport,
 		},
 	})

api/transport.go

@@ -0,0 +1,15 @@
+package api
+
+import "net/http"
+
+type apiTransport struct {
+	clientId string
+}
+
+var _ http.RoundTripper = (*apiTransport)(nil)
+
+// RoundTrip implements http.RoundTripper.
+func (a *apiTransport) RoundTrip(req *http.Request) (*http.Response, error) {
+	req.Header.Add("Client-ID", a.clientId)
+	return http.DefaultTransport.RoundTrip(req)
+}