start

token.go

@@ -0,0 +1,62 @@
+package igdb
+
+import (
+	"encoding/json"
+	"fmt"
+	"github/bestnite/go-igdb/constant"
+	"net/url"
+	"time"
+)
+
+type twitchToken struct {
+	clientID     string
+	clientSecret string
+	token        string
+	expires      time.Time
+}
+
+func NewTwitchToken(clientID, clientSecret string) *twitchToken {
+	return &twitchToken{
+		clientID:     clientID,
+		clientSecret: clientSecret,
+	}
+}
+
+func (t *twitchToken) getToken() (string, error) {
+	if t.token != "" && time.Now().Before(t.expires) {
+		return t.token, nil
+	}
+	token, expires, err := t.loginTwitch()
+	if err != nil {
+		return "", fmt.Errorf("failed to login twitch: %w", err)
+	}
+	t.token = token
+	t.expires = time.Now().Add(expires)
+	return token, nil
+}
+
+func (t *twitchToken) loginTwitch() (string, time.Duration, error) {
+	baseURL, _ := url.Parse(constant.TwitchAuthURL)
+	params := url.Values{}
+	params.Add("client_id", t.clientID)
+	params.Add("client_secret", t.clientSecret)
+	params.Add("grant_type", "client_credentials")
+	baseURL.RawQuery = params.Encode()
+
+	resp, err := request().SetHeader("User-Agent", "").Post(baseURL.String())
+	if err != nil {
+		return "", 0, fmt.Errorf("failed to make request: %s: %w", baseURL.String(), err)
+	}
+
+	data := struct {
+		AccessToken string `json:"access_token"`
+		ExpiresIn   int64  `json:"expires_in"`
+		TokenType   string `json:"token_type"`
+	}{}
+
+	err = json.Unmarshal(resp.Body(), &data)
+	if err != nil {
+		return "", 0, fmt.Errorf("failed to parse response: %w", err)
+	}
+	return data.AccessToken, time.Second * time.Duration(data.ExpiresIn), nil
+}