149 行
3.3 KiB
Go
149 行
3.3 KiB
Go
// Package RFC contains ontology values that are defined in RFCs, BCPs, and
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// other miscellaneous standards.
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package rfc
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import (
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"fmt"
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"github.com/cjslep/activity/tools/exp/codegen"
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"github.com/cjslep/activity/tools/exp/rdf"
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"github.com/dave/jennifer/jen"
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"net/url"
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"strings"
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)
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const (
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rfcSpec = "https://tools.ietf.org/html/"
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bcp47Spec = "bcp47"
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)
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type RFCOntology struct {
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Package string
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}
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func (o *RFCOntology) SpecURI() string {
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return rfcSpec
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}
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func (o *RFCOntology) Load() ([]rdf.RDFNode, error) {
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return o.LoadAsAlias("")
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}
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func (o *RFCOntology) LoadAsAlias(s string) ([]rdf.RDFNode, error) {
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return []rdf.RDFNode{
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&rdf.AliasedDelegate{
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Spec: rfcSpec,
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Alias: s,
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Name: bcp47Spec,
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Delegate: &bcp47{pkg: o.Package},
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},
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}, nil
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}
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func (o *RFCOntology) LoadSpecificAsAlias(alias, name string) ([]rdf.RDFNode, error) {
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switch name {
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case bcp47Spec:
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return []rdf.RDFNode{
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&rdf.AliasedDelegate{
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Spec: "",
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Alias: "",
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Name: alias,
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Delegate: &bcp47{pkg: o.Package},
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},
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}, nil
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}
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return nil, fmt.Errorf("rfc ontology cannot find %q to alias to %q", name, alias)
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}
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func (o *RFCOntology) LoadElement(name string, payload map[string]interface{}) ([]rdf.RDFNode, error) {
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return nil, nil
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}
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func (o *RFCOntology) GetByName(name string) (rdf.RDFNode, error) {
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name = strings.TrimPrefix(name, o.SpecURI())
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switch name {
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case bcp47Spec:
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return &bcp47{pkg: o.Package}, nil
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}
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return nil, fmt.Errorf("rfc ontology could not find node for name %s", name)
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}
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var _ rdf.RDFNode = &bcp47{}
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type bcp47 struct {
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pkg string
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}
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func (b *bcp47) Enter(key string, ctx *rdf.ParsingContext) (bool, error) {
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return true, fmt.Errorf("bcp47 langaugetag cannot be entered")
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}
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func (b *bcp47) Exit(key string, ctx *rdf.ParsingContext) (bool, error) {
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return true, fmt.Errorf("bcp47 languagetag cannot be exited")
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}
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func (b *bcp47) Apply(key string, value interface{}, ctx *rdf.ParsingContext) (bool, error) {
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v := ctx.Result.GetReference(rfcSpec)
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if len(v.Values[bcp47Spec].Name) == 0 {
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u, err := url.Parse(rfcSpec + bcp47Spec)
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if err != nil {
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return true, err
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}
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val := &rdf.VocabularyValue{
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Name: bcp47Spec,
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URI: u,
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DefinitionType: jen.String(),
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Zero: "\"\"",
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IsNilable: false,
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SerializeFn: rdf.SerializeValueFunction(
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b.pkg,
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bcp47Spec,
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jen.String(),
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[]jen.Code{
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jen.Return(
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jen.Id(codegen.This()),
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jen.Nil(),
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),
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}),
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DeserializeFn: rdf.DeserializeValueFunction(
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b.pkg,
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bcp47Spec,
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jen.String(),
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[]jen.Code{
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jen.If(
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jen.List(
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jen.Id("s"),
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jen.Id("ok"),
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).Op(":=").Id(codegen.This()).Assert(jen.String()),
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jen.Id("ok"),
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).Block(
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jen.Return(
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jen.Id("s"),
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jen.Nil(),
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),
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).Else().Block(
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jen.Return(
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jen.Lit(""),
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jen.Qual("fmt", "Errorf").Call(
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jen.Lit("%v cannot be interpreted as a string for bcp47 languagetag"),
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jen.Id(codegen.This()),
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),
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),
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),
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}),
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LessFn: rdf.LessFunction(
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b.pkg,
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bcp47Spec,
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jen.String(),
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[]jen.Code{
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jen.Return(
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jen.Id("lhs").Op("<").Id("rhs"),
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),
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}),
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}
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if err = v.SetValue(bcp47Spec, val); err != nil {
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return true, err
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}
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}
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return true, nil
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}
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