feat: reimplement influx backup using new APIs (#116)

api/error.go

@@ -5,6 +5,11 @@ import (
 	"strings"
 )
 
+type ApiError interface {
+	error
+	ErrorCode() ErrorCode
+}
+
 // Extensions to let our API error types be used as "standard" errors.
 
 func (o *Error) Error() string {
@@ -22,6 +27,10 @@ func (o *Error) Error() string {
 	return fmt.Sprintf("<%s>", o.Code)
 }
 
+func (o *Error) ErrorCode() ErrorCode {
+	return o.Code
+}
+
 func (o *HealthCheck) Error() string {
 	if o.Status == HEALTHCHECKSTATUS_PASS {
 		// Make sure we aren't misusing HealthCheck responses.
@@ -36,10 +45,47 @@ func (o *HealthCheck) Error() string {
 	return fmt.Sprintf("health check failed: %s", message)
 }
 
+func (o *HealthCheck) ErrorCode() ErrorCode {
+	if o.Status == HEALTHCHECKSTATUS_PASS {
+		// Make sure we aren't misusing HealthCheck responses.
+		panic("successful healthcheck used as an error!")
+	}
+
+	return ERRORCODE_INTERNAL_ERROR
+}
+
 func (o *LineProtocolError) Error() string {
 	return o.Message
 }
 
+func (o *LineProtocolError) ErrorCode() ErrorCode {
+	switch o.Code {
+	case LINEPROTOCOLERRORCODE_CONFLICT:
+		return ERRORCODE_CONFLICT
+	case LINEPROTOCOLERRORCODE_EMPTY_VALUE:
+		return ERRORCODE_EMPTY_VALUE
+	case LINEPROTOCOLERRORCODE_NOT_FOUND:
+		return ERRORCODE_NOT_FOUND
+	case LINEPROTOCOLERRORCODE_UNAVAILABLE:
+		return ERRORCODE_UNAVAILABLE
+	case LINEPROTOCOLERRORCODE_INTERNAL_ERROR:
+		return ERRORCODE_INTERNAL_ERROR
+	case LINEPROTOCOLERRORCODE_INVALID:
+		fallthrough
+	default:
+		return ERRORCODE_INVALID
+	}
+}
+
 func (o *LineProtocolLengthError) Error() string {
 	return o.Message
 }
+
+func (o *LineProtocolLengthError) ErrorCode() ErrorCode {
+	switch o.Code {
+	case LINEPROTOCOLLENGTHERRORCODE_INVALID:
+		fallthrough
+	default:
+		return ERRORCODE_INVALID
+	}
+}