Initial commit

vendor/github.com/carlmjohnson/requests/validator_handler.go

@@ -0,0 +1,34 @@
+package requests
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+)
+
+// ValidatorHandler composes a Validator and a Handler.
+// If the validation check fails, it triggers the handler.
+// Any errors from validator or handler will be joined to the error returned.
+// If the handler succeeds, the error will matching ErrInvalidHandled.
+func ValidatorHandler(v, h ResponseHandler) ResponseHandler {
+	return func(res *http.Response) error {
+		err1 := v(res)
+		if err1 == nil { // passes validation
+			return nil
+		}
+		err2 := h(res)
+		if err2 == nil { // successfully handled
+			return fmt.Errorf("%w: %w", ErrInvalidHandled, err1)
+		}
+		return errors.Join(err1, err2)
+	}
+}
+
+var ErrInvalidHandled = errors.New("handled recovery from invalid response")
+
+// ErrorJSON is a ValidatorHandler that applies DefaultValidator
+// and decodes the response as a JSON object
+// if the DefaultValidator check fails.
+func ErrorJSON(v any) ResponseHandler {
+	return ValidatorHandler(DefaultValidator, ToJSON(v))
+}