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bd07c86b60
Summary: Used addlicense to generate this: addlicense -c "Facebook Inc" -f license_header . example was taken from: https://github.com/facebook/litho/blob/master/lib/soloader/BUCK Reviewed By: alexsn Differential Revision: D17070152 fbshipit-source-id: e7b91398d7f6181727be3400c1872ad5f28e38ed
48 lines
1.3 KiB
Go
48 lines
1.3 KiB
Go
// Copyright 2019-present Facebook Inc. All rights reserved.
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// This source code is licensed under the Apache 2.0 license found
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// in the LICENSE file in the root directory of this source tree.
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package gremlin
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import (
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"context"
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"sort"
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"strings"
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"github.com/json-iterator/go"
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"github.com/pkg/errors"
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)
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// ExpandBindings expands the given RoundTripper and expands the request bindings into the Gremlin traversal.
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func ExpandBindings(rt RoundTripper) RoundTripper {
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return RoundTripperFunc(func(ctx context.Context, r *Request) (*Response, error) {
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bindings, ok := r.Arguments[ArgsBindings]
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if !ok {
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return rt.RoundTrip(ctx, r)
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}
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query, ok := r.Arguments[ArgsGremlin]
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if !ok {
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return rt.RoundTrip(ctx, r)
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}
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{
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query, bindings := query.(string), bindings.(map[string]interface{})
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keys := make(sort.StringSlice, 0, len(bindings))
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for k := range bindings {
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keys = append(keys, k)
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}
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sort.Sort(sort.Reverse(keys))
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kv := make([]string, 0, len(bindings)*2)
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for _, k := range keys {
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s, err := jsoniter.MarshalToString(bindings[k])
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if err != nil {
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return nil, errors.WithMessagef(err, "marshal bindings value for key %s", k)
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}
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kv = append(kv, k, s)
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}
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delete(r.Arguments, ArgsBindings)
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r.Arguments[ArgsGremlin] = strings.NewReplacer(kv...).Replace(query)
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}
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return rt.RoundTrip(ctx, r)
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})
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}
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