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// Copyright 2019-present Facebook Inc. All rights reserved.
// This source code is licensed under the Apache 2.0 license found
// in the LICENSE file in the root directory of this source tree.
package gremlin
import (
"github.com/facebook/ent/dialect/gremlin/encoding/graphson"
"github.com/facebook/ent/dialect/gremlin/graph"
"github.com/pkg/errors"
)
// A Response models a response message received from the server.
type Response struct {
RequestID string `json:"requestId" graphson:"g:UUID"`
Status struct {
Code int `json:"code"`
Attributes map[string]interface{} `json:"attributes"`
Message string `json:"message"`
} `json:"status"`
Result struct {
Data graphson.RawMessage `json:"data"`
Meta map[string]interface{} `json:"meta"`
} `json:"result"`
}
// IsErr returns whether response indicates an error.
func (rsp *Response) IsErr() bool {
switch rsp.Status.Code {
case StatusSuccess, StatusNoContent, StatusPartialContent:
return false
default:
return true
}
}
// Err returns an error representing response status.
func (rsp *Response) Err() error {
if rsp.IsErr() {
return errors.Errorf("gremlin: code=%d, message=%q", rsp.Status.Code, rsp.Status.Message)
}
return nil
}
// ReadVal reads gremlin response data into v.
func (rsp *Response) ReadVal(v interface{}) error {
if err := rsp.Err(); err != nil {
return err
}
if err := graphson.Unmarshal(rsp.Result.Data, v); err != nil {
return errors.Wrapf(err, "gremlin: unmarshal response data: type=%T", v)
}
return nil
}
// ReadVertices returns response data as slice of vertices.
func (rsp *Response) ReadVertices() ([]graph.Vertex, error) {
var v []graph.Vertex
err := rsp.ReadVal(&v)
return v, err
}
// ReadVertexProperties returns response data as slice of vertex properties.
func (rsp *Response) ReadVertexProperties() ([]graph.VertexProperty, error) {
var vp []graph.VertexProperty
err := rsp.ReadVal(&vp)
return vp, err
}
// ReadEdges returns response data as slice of edges.
func (rsp *Response) ReadEdges() ([]graph.Edge, error) {
var e []graph.Edge
err := rsp.ReadVal(&e)
return e, err
}
// ReadProperties returns response data as slice of properties.
func (rsp *Response) ReadProperties() ([]graph.Property, error) {
var p []graph.Property
err := rsp.ReadVal(&p)
return p, err
}
// ReadValueMap returns response data as a value map.
func (rsp *Response) ReadValueMap() (graph.ValueMap, error) {
var m graph.ValueMap
err := rsp.ReadVal(&m)
return m, err
}
// ReadBool returns response data as a bool.
func (rsp *Response) ReadBool() (bool, error) {
var b [1]*bool
if err := rsp.ReadVal(&b); err != nil {
return false, err
}
if b[0] == nil {
return false, errors.New("gremlin: no boolean value")
}
return *b[0], nil
}
// ReadInt returns response data as an int.
func (rsp *Response) ReadInt() (int, error) {
var v [1]*int
if err := rsp.ReadVal(&v); err != nil {
return 0, err
}
if v[0] == nil {
return 0, errors.New("gremlin: no integer value")
}
return *v[0], nil
}
// ReadString returns response data as a string.
func (rsp *Response) ReadString() (string, error) {
var v [1]*string
if err := rsp.ReadVal(&v); err != nil {
return "", err
}
if v[0] == nil {
return "", errors.New("gremlin: no string value")
}
return *v[0], nil
}
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