124 lines
4.5 KiB
Go
124 lines
4.5 KiB
Go
// Package invariants validates normalized D&D scene description artifacts.
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package invariants
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import (
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"context"
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"fmt"
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"sort"
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"gitea.maximumdirect.net/eric/notarius/internal/core/source"
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"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
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"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/validate/scenedescriptions/shape"
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)
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const (
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Key = "normalize/dnd/scene-descriptions/invariants"
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ReasonCode = "invalid_scene_description_normalization"
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policy = "dnd.scene_descriptions.validator.invariants.v1"
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)
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type Options struct{}
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type Validator struct{}
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var _ contracts.TypedValidator[dnd.SceneDescriptionList] = (*Validator)(nil)
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var _ pipeline.CheckpointFingerprintProvider = (*Validator)(nil)
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func New(Options) *Validator { return &Validator{} }
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func (v *Validator) Name() string { return Key }
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func (v *Validator) ExecutionClass() contracts.ExecutionClass {
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return contracts.ExecutionClassDeterministic
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}
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func (v *Validator) CheckpointFingerprints() []pipeline.CheckpointFingerprint {
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return []pipeline.CheckpointFingerprint{{Name: "policy", Value: policy}}
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}
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func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationRequest[dnd.SceneDescriptionList]) (contracts.ValidationResult, error) {
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if shape.Validate(req.Value) != nil {
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return contracts.ValidationResult{Approved: true}, nil
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}
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index := source.NewDocumentIndex(req.Source)
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if !sourceRefsValid(index, req.Value) {
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return contracts.ValidationResult{Approved: true}, nil
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}
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issues := issuesFor(index, req.Value)
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if len(issues) == 0 {
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return contracts.ValidationResult{Approved: true}, nil
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}
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return contracts.ValidationResult{
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Approved: false, ReasonCode: ReasonCode,
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Message: diagnostics.Aggregate("invalid scene description normalization", issues),
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}, nil
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}
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func sourceRefsValid(index source.DocumentIndex, value dnd.SceneDescriptionList) bool {
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for _, scene := range value.Scenes {
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if index.ValidateRef(scene.SourceRef) != nil {
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return false
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}
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}
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return true
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}
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func issuesFor(index source.DocumentIndex, value dnd.SceneDescriptionList) []string {
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issues := make([]string, 0)
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if !sort.SliceIsSorted(value.Scenes, func(left, right int) bool {
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leftStart, _ := index.Position(value.Scenes[left].SourceRef.StartUnitID)
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rightStart, _ := index.Position(value.Scenes[right].SourceRef.StartUnitID)
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if leftStart != rightStart {
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return leftStart < rightStart
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}
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return value.Scenes[left].ID < value.Scenes[right].ID
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}) {
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issues = append(issues, "scenes are not in canonical source order")
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}
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byID := make(map[string]int, len(value.Scenes))
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byRange := make(map[source.SourceRef]int, len(value.Scenes))
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for index, scene := range value.Scenes {
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if index > 0 && value.Scenes[index-1] == scene {
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issues = append(issues, fmt.Sprintf("scenes[%d] duplicates scenes[%d]", index, index-1))
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}
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if previous, ok := byID[scene.ID]; ok && value.Scenes[previous] != scene {
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issues = append(issues, fmt.Sprintf("scenes[%d] conflicts with scenes[%d] for scene ID", index, previous))
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} else if !ok {
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byID[scene.ID] = index
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}
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if previous, ok := byRange[scene.SourceRef]; ok && !sameModelContent(value.Scenes[previous], scene) {
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issues = append(issues, fmt.Sprintf("scenes[%d] conflicts with scenes[%d] for source range", index, previous))
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} else if !ok {
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byRange[scene.SourceRef] = index
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}
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}
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return issues
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}
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func sameModelContent(left, right dnd.SceneDescription) bool {
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return left.Kind == right.Kind && left.Title == right.Title && left.Summary == right.Summary
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}
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func Spec() pipeline.ValidatorSpec {
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return pipeline.ValidatorSpec{Key: Key, ExecutionClass: contracts.ExecutionClassDeterministic}
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}
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func Register(registry *pipeline.ValidatorRegistry) error {
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return pipeline.RegisterTypedValidatorBuilder(registry, dnd.SceneDescriptionListKind, Spec(), validateOptions, func(request pipeline.BuildRequest) (contracts.TypedValidator[dnd.SceneDescriptionList], error) {
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options, err := DecodeOptions(request.Options)
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if err != nil {
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return nil, err
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}
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return New(options), nil
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})
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}
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func DecodeOptions(options map[string]any) (Options, error) {
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if err := pipeline.RejectUnknownOptions(options); err != nil {
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return Options{}, err
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}
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return Options{}, nil
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}
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func validateOptions(options map[string]any) error { _, err := DecodeOptions(options); return err }
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