Add item registry domain foundation
This commit is contained in:
287
internal/modules/dnd/items/registry/registry.go
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287
internal/modules/dnd/items/registry/registry.go
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@@ -0,0 +1,287 @@
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// Package registry resolves normalized item artifacts into immutable grounding
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// data for future D&D consumers.
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package registry
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import (
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"crypto/sha256"
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"encoding/hex"
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"encoding/json"
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"fmt"
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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/modules/dnd"
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itemcodec "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/codec/itemregistry"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/items/identity"
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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/shared/registryresolver"
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)
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const (
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ReferenceSlot = "item_registry"
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MaxBytes = 1048576
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emptyPrompt = `{"items":[]}`
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)
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// Registry is an immutable, validated item registry prepared for grounding.
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// All accessors return defensive copies.
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type Registry struct {
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bound bool
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list dnd.ItemRegistry
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canonical []byte
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digest string
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projectionDigest string
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promptInput contracts.LLMInputMaterial
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lookupByKey map[string]int
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lookupByID map[string]int
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}
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// Resolver selects and memoizes immutable item registry views.
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type Resolver struct {
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resolver *registryresolver.Resolver[*Registry]
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}
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// NewResolver validates the optional construction-time item reference and
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// prepares the operation-time registry cache.
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func NewResolver(references contracts.ReferenceSet) (*Resolver, error) {
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resolver, err := registryresolver.New(registryResolverConfig(), references)
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if err != nil {
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return nil, err
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}
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return &Resolver{resolver: resolver}, nil
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}
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// Seeded returns the immutable construction-time registry.
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func (r *Resolver) Seeded() *Registry {
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if r == nil {
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return nil
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}
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return r.resolver.Seeded()
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}
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// Resolve returns the generated operation-time registry when supplied,
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// otherwise it returns the construction-time registry.
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func (r *Resolver) Resolve(references contracts.ReferenceSet) (*Registry, error) {
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if r == nil || r.resolver == nil {
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return Resolve(references)
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}
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return r.resolver.Resolve(references)
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}
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// Resolve prepares the optional item registry reference. An absent slot uses
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// the exact empty prompt input and has no durable registry identity.
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func Resolve(references contracts.ReferenceSet) (*Registry, error) {
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item, present, err := registryresolver.ResolveOptionalSingleItem(references, itemReferenceSpec())
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if err != nil {
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return nil, err
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}
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if !present {
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return emptyRegistry(), nil
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}
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return loadRegistry(item.Content)
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}
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func registryResolverConfig() registryresolver.Config[*Registry] {
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return registryresolver.Config[*Registry]{
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Reference: itemReferenceSpec(),
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Absent: func() (*Registry, error) {
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return emptyRegistry(), nil
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},
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Load: loadRegistry,
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SemanticIdentity: func(registry *Registry) string {
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return registry.Digest()
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},
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}
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}
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func itemReferenceSpec() registryresolver.ReferenceSpec {
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return registryresolver.ReferenceSpec{SlotName: ReferenceSlot, AcceptedMediaType: itemcodec.MediaType, MaxBytes: MaxBytes}
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}
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func emptyRegistry() *Registry {
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content := []byte(emptyPrompt)
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projectionDigest := semanticDigest(content)
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return &Registry{
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list: dnd.ItemRegistry{Items: []dnd.Item{}},
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canonical: append([]byte(nil), content...),
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projectionDigest: projectionDigest,
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promptInput: contracts.NewLLMInputMaterial(ReferenceSlot, itemcodec.MediaType, content, projectionDigest, ""),
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lookupByKey: map[string]int{},
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lookupByID: map[string]int{},
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}
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}
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func loadRegistry(referenceContent []byte) (*Registry, error) {
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codec := itemcodec.New()
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value, err := codec.Decode(referenceContent)
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if err != nil {
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return nil, fmt.Errorf("decode item registry: invalid approved item JSON")
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}
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if issues := identity.ValidateList(value); len(issues) > 0 {
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return nil, fmt.Errorf("%s", formatIdentityIssues(issues))
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}
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content, err := codec.Encode(value)
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if err != nil {
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return nil, fmt.Errorf("encode canonical item registry: approved item value could not be encoded")
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}
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list := cloneItemRegistry(value)
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lookupByKey := make(map[string]int, len(list.Items))
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lookupByID := make(map[string]int, len(list.Items))
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for index, item := range list.Items {
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lookupByKey[identity.ComparisonKey(item.Name)] = index
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lookupByID[item.ID] = index
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}
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projection, err := promptProjection(list)
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if err != nil {
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return nil, fmt.Errorf("encode item registry projection: %w", err)
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}
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projectionDigest := semanticDigest(projection)
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return &Registry{
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bound: true,
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list: list,
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canonical: append([]byte(nil), content...),
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digest: semanticDigest(content),
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projectionDigest: projectionDigest,
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promptInput: contracts.NewLLMInputMaterial(ReferenceSlot, itemcodec.MediaType, projection, projectionDigest, ""),
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lookupByKey: lookupByKey,
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lookupByID: lookupByID,
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}, nil
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}
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// Bound reports whether an item reference was supplied and validated.
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func (r *Registry) Bound() bool { return r != nil && r.bound }
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// Items returns a defensive copy of the validated item records.
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func (r *Registry) Items() []dnd.Item {
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if r == nil {
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return nil
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}
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return cloneItems(r.list.Items)
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}
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// List returns a defensive copy of the validated item registry.
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func (r *Registry) List() dnd.ItemRegistry {
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if r == nil {
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return dnd.ItemRegistry{}
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}
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return cloneItemRegistry(r.list)
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}
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// CanonicalBytes returns a defensive copy of the canonical durable JSON.
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func (r *Registry) CanonicalBytes() []byte {
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if r == nil {
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return nil
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}
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return append([]byte(nil), r.canonical...)
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}
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// Digest returns the semantic SHA-256 digest of the canonical JSON, or an
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// empty string when the registry is unbound.
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func (r *Registry) Digest() string {
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if r == nil {
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return ""
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}
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return r.digest
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}
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// ProjectionDigest returns the SHA-256 digest of the exact ID/name prompt
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// projection, including for an unbound or empty registry.
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func (r *Registry) ProjectionDigest() string {
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if r == nil {
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return ""
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}
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return r.projectionDigest
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}
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// Count returns the number of validated item records.
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func (r *Registry) Count() int {
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if r == nil {
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return 0
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}
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return len(r.list.Items)
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}
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// PromptInput returns the ordered ID/name registry projection as a content-safe
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// prompt input. Evidence and reference provenance are omitted.
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func (r *Registry) PromptInput() contracts.LLMInputMaterial {
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if r == nil {
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return contracts.LLMInputMaterial{}
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}
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return r.promptInput.Clone()
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}
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// Lookup returns the canonical item for an exact canonical-name match under
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// the item identity comparison policy.
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func (r *Registry) Lookup(value string) (dnd.Item, bool) {
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if r == nil {
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return dnd.Item{}, false
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}
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index, ok := r.lookupByKey[identity.ComparisonKey(value)]
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if !ok {
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return dnd.Item{}, false
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}
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return cloneItem(r.list.Items[index]), true
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}
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// LookupID returns the canonical item for an exact durable ID.
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func (r *Registry) LookupID(value string) (dnd.Item, bool) {
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if r == nil {
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return dnd.Item{}, false
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}
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index, ok := r.lookupByID[value]
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if !ok {
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return dnd.Item{}, false
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}
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return cloneItem(r.list.Items[index]), true
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}
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func semanticDigest(content []byte) string {
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sum := sha256.Sum256(content)
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return "sha256:" + hex.EncodeToString(sum[:])
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}
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type projectedItem struct {
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ID string `json:"id"`
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Name string `json:"name"`
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}
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type projectedItemRegistry struct {
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Items []projectedItem `json:"items"`
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}
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func promptProjection(list dnd.ItemRegistry) ([]byte, error) {
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projection := projectedItemRegistry{Items: make([]projectedItem, len(list.Items))}
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for index, item := range list.Items {
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projection.Items[index] = projectedItem{ID: item.ID, Name: item.Name}
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}
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return json.Marshal(projection)
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}
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func formatIdentityIssues(issues []identity.Issue) string {
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parts := make([]string, len(issues))
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for index, issue := range issues {
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parts[index] = fmt.Sprintf("%s at record %d", issue.Code, issue.RecordIndex)
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}
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return diagnostics.Aggregate("validate item registry identity", parts)
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}
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func cloneItemRegistry(value dnd.ItemRegistry) dnd.ItemRegistry {
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return dnd.ItemRegistry{Items: cloneItems(value.Items)}
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}
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func cloneItems(values []dnd.Item) []dnd.Item {
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if values == nil {
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return nil
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}
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cloned := make([]dnd.Item, len(values))
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for index, value := range values {
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cloned[index] = cloneItem(value)
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}
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return cloned
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}
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func cloneItem(value dnd.Item) dnd.Item {
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value.SourceRefs = append([]source.SourceRef(nil), value.SourceRefs...)
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return value
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}
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