sync

internal/auth/auth.go

@@ -0,0 +1,92 @@
+package auth
+
+import (
+	"net/http"
+
+	"github.com/dghubble/oauth1"
+)
+
+// OAuthConfig holds OAuth1 configuration for Garmin Connect
+type OAuthConfig struct {
+	ConsumerKey    string
+	ConsumerSecret string
+}
+
+// TokenStorage defines the interface for storing and retrieving OAuth tokens
+type TokenStorage interface {
+	GetToken() (*oauth1.Token, error)
+	SaveToken(*oauth1.Token) error
+}
+
+// Authenticate initiates the OAuth1 authentication flow
+func Authenticate(w http.ResponseWriter, r *http.Request, config *OAuthConfig, storage TokenStorage) {
+	// Create OAuth1 config
+	oauthConfig := oauth1.Config{
+		ConsumerKey:    config.ConsumerKey,
+		ConsumerSecret: config.ConsumerSecret,
+		CallbackURL:    "http://localhost:8080/callback",
+		Endpoint: oauth1.Endpoint{
+			RequestTokenURL: "https://connect.garmin.com/oauth-service/oauth/request_token",
+			AuthorizeURL:    "https://connect.garmin.com/oauth-service/oauth/authorize",
+			AccessTokenURL:  "https://connect.garmin.com/oauth-service/oauth/access_token",
+		},
+	}
+
+	// Get request token
+	requestToken, _, err := oauthConfig.RequestToken()
+	if err != nil {
+		http.Error(w, "Failed to get request token", http.StatusInternalServerError)
+		return
+	}
+
+	// Save request token secret temporarily (for callback)
+	// In a real application, you'd store this in a session
+
+	// Redirect to authorization URL
+	authURL, err := oauthConfig.AuthorizationURL(requestToken)
+	if err != nil {
+		http.Error(w, "Failed to get authorization URL", http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r, authURL.String(), http.StatusTemporaryRedirect)
+}
+
+// Callback handles OAuth1 callback
+func Callback(w http.ResponseWriter, r *http.Request, config *OAuthConfig, storage TokenStorage, requestSecret string) {
+	// Get request token and verifier from query params
+	requestToken := r.URL.Query().Get("oauth_token")
+	verifier := r.URL.Query().Get("oauth_verifier")
+
+	// Create OAuth1 config
+	oauthConfig := oauth1.Config{
+		ConsumerKey:    config.ConsumerKey,
+		ConsumerSecret: config.ConsumerSecret,
+		Endpoint: oauth1.Endpoint{
+			RequestTokenURL: "https://connect.garmin.com/oauth-service/oauth/request_token",
+			AccessTokenURL:  "https://connect.garmin.com/oauth-service/oauth/access_token",
+		},
+	}
+
+	// Get access token
+	accessToken, accessSecret, err := oauthConfig.AccessToken(requestToken, requestSecret, verifier)
+	if err != nil {
+		http.Error(w, "Failed to get access token", http.StatusInternalServerError)
+		return
+	}
+
+	// Create token and save
+	token := &oauth1.Token{
+		Token:       accessToken,
+		TokenSecret: accessSecret,
+	}
+	
+	err = storage.SaveToken(token)
+	if err != nil {
+		http.Error(w, "Failed to save token", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte("Authentication successful!"))
+}