mirror of
https://github.com/LukeHagar/libopenapi.git
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82 lines
2.5 KiB
Go
82 lines
2.5 KiB
Go
// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
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// SPDX-License-Identifier: MIT
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package v3
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import (
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"context"
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"crypto/sha256"
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"fmt"
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"strings"
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"github.com/pb33f/libopenapi/datamodel/low"
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"github.com/pb33f/libopenapi/index"
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"github.com/pb33f/libopenapi/orderedmap"
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"github.com/pb33f/libopenapi/utils"
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"gopkg.in/yaml.v3"
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)
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// Encoding represents a low-level OpenAPI 3+ Encoding object
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// - https://spec.openapis.org/oas/v3.1.0#encoding-object
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type Encoding struct {
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ContentType low.NodeReference[string]
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Headers low.NodeReference[orderedmap.Map[low.KeyReference[string], low.ValueReference[*Header]]]
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Style low.NodeReference[string]
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Explode low.NodeReference[bool]
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AllowReserved low.NodeReference[bool]
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*low.Reference
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}
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// FindHeader attempts to locate a Header with the supplied name
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func (en *Encoding) FindHeader(hType string) *low.ValueReference[*Header] {
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return low.FindItemInOrderedMap[*Header](hType, en.Headers.Value)
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}
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// Hash will return a consistent SHA256 Hash of the Encoding object
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func (en *Encoding) Hash() [32]byte {
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var f []string
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if en.ContentType.Value != "" {
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f = append(f, en.ContentType.Value)
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}
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if orderedmap.Len(en.Headers.Value) > 0 {
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l := make([]string, orderedmap.Len(en.Headers.Value))
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keys := make(map[string]low.ValueReference[*Header])
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z := 0
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for pair := orderedmap.First(en.Headers.Value); pair != nil; pair = pair.Next() {
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keys[pair.Key().Value] = pair.Value()
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l[z] = pair.Key().Value
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z++
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}
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// FIXME: Redundant iteration?
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for pair := orderedmap.First(en.Headers.Value); pair != nil; pair = pair.Next() {
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f = append(f, fmt.Sprintf("%s-%x", pair.Key().Value, pair.Value().Value.Hash()))
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}
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}
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if en.Style.Value != "" {
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f = append(f, en.Style.Value)
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}
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f = append(f, fmt.Sprint(sha256.Sum256([]byte(fmt.Sprint(en.Explode.Value)))))
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f = append(f, fmt.Sprint(sha256.Sum256([]byte(fmt.Sprint(en.AllowReserved.Value)))))
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return sha256.Sum256([]byte(strings.Join(f, "|")))
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}
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// Build will extract all Header objects from supplied node.
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func (en *Encoding) Build(ctx context.Context, _, root *yaml.Node, idx *index.SpecIndex) error {
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root = utils.NodeAlias(root)
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utils.CheckForMergeNodes(root)
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en.Reference = new(low.Reference)
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headers, hL, hN, err := low.ExtractMap[*Header](ctx, HeadersLabel, root, idx)
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if err != nil {
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return err
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}
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if headers != nil {
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en.Headers = low.NodeReference[orderedmap.Map[low.KeyReference[string], low.ValueReference[*Header]]]{
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Value: headers,
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KeyNode: hL,
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ValueNode: hN,
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}
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}
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return nil
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}
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