support Nextcloud OAuth 2.0 authentication

pkg/auth/oauth2/oauth2_context.go

@@ -0,0 +1,31 @@
+package oauth2
+
+import (
+	"net/http"
+
+	"golang.org/x/oauth2"
+
+	"github.com/mayswind/ezbookkeeping/pkg/core"
+)
+
+// OAuth2Context represents the context for OAuth 2.0 operations
+type OAuth2Context struct {
+	core.Context
+	httpClient *http.Client
+}
+
+// Value returns the value associated with key
+func (o *OAuth2Context) Value(key any) any {
+	if key == oauth2.HTTPClient {
+		return o.httpClient
+	}
+
+	return o.Context.Value(key)
+}
+
+func wrapOAuth2Context(ctx core.Context, httpClient *http.Client) core.Context {
+	return &OAuth2Context{
+		Context:    ctx,
+		httpClient: httpClient,
+	}
+}