298 lines
10 KiB
Go
298 lines
10 KiB
Go
// Package enemyevents normalizes merged D&D enemy-event candidates.
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package enemyevents
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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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enemyeventmodel "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/enemyevents"
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npcregistry "gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/npcs/registry"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared"
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"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
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)
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const (
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Key = "dnd/enemy-events"
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normalizationPolicy = "dnd.enemy_events.normalize.v1"
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NormalizationPolicy = normalizationPolicy
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ReasonCodeNameCanonicalized = "enemy_event_name_canonicalized"
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ReasonCodeSourceRefsNormalized = "source_references_normalized"
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ReasonCodeEventsReordered = "enemy_events_reordered"
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ReasonCodeDuplicateCollapsed = "duplicate_enemy_event_collapsed"
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ReasonCodeWarningsOmitted = "enemy_event_normalization_warnings_omitted"
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)
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const (
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NPCRegistryReferenceSlot = npcregistry.ReferenceSlot
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NPCRegistryMaxBytes = npcregistry.MaxBytes
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)
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var requiredCapabilities = []string{"merged"}
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var providedCapabilities = []string{"normalized"}
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var _ contracts.Normalizer[dnd.EnemyEventList] = (*Normalizer)(nil)
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var _ contracts.ManifestMetadataProvider = (*Normalizer)(nil)
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var _ pipeline.CheckpointFingerprintProvider = (*Normalizer)(nil)
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type Options struct{}
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type Normalizer struct {
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npcResolver *npcregistry.Resolver
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}
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func New(_ Options, references ...contracts.ReferenceSet) (*Normalizer, error) {
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if len(references) > 1 {
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return nil, normalizerErrorf("at most one reference set may be supplied")
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}
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var referenceSet contracts.ReferenceSet
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if len(references) == 1 {
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referenceSet = references[0]
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}
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resolver, err := npcregistry.NewResolver(referenceSet)
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if err != nil {
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return nil, normalizerErrorf("prepare NPC registry: %w", err)
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}
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return &Normalizer{npcResolver: resolver}, nil
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}
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func (n *Normalizer) Key() string { return Key }
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func (n *Normalizer) ReferenceSlots() []contracts.ReferenceSlot { return referenceSlots() }
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func (n *Normalizer) ManifestMetadata() map[string]any {
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if n == nil || n.npcResolver == nil {
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return nil
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}
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metadata := map[string]any{"normalization_policy": normalizationPolicy}
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if seeded := n.npcResolver.Seeded(); seeded.Bound() {
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metadata["npc_registry_digest"] = seeded.Digest()
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}
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return metadata
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}
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func (n *Normalizer) CheckpointFingerprints() []pipeline.CheckpointFingerprint {
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if n == nil || n.npcResolver == nil {
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return nil
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}
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return []pipeline.CheckpointFingerprint{
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{Name: "normalization_policy", Value: normalizationPolicy},
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{Name: "npc_registry", Value: n.npcResolver.Seeded().ProjectionDigest()},
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}
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}
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func (n *Normalizer) Normalize(ctx context.Context, req contracts.TypedNormalizeRequest[dnd.EnemyEventList]) (contracts.TypedNormalizeResult[dnd.EnemyEventList], error) {
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if n == nil || n.npcResolver == nil {
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{}, normalizerErrorf("normalizer must not be nil")
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}
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if ctx == nil {
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{}, normalizerErrorf("context must not be nil")
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}
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if err := ctx.Err(); err != nil {
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{}, normalizerErrorf("context error before normalize: %w", err)
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}
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registry, err := n.npcResolver.Resolve(req.References)
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if err != nil {
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{}, normalizerErrorf("resolve NPC registry: %w", err)
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}
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if !registry.Bound() {
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{}, normalizerErrorf("NPC registry reference is required")
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}
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index := source.NewDocumentIndex(req.Source)
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order := shared.NewSourceRefOrderFromIndex(index)
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value, warnings := normalizeList(req.MergeOutput.Value, order, registry)
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return contracts.TypedNormalizeResult[dnd.EnemyEventList]{Value: value, Warnings: warnings}, nil
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}
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type normalizedRecord struct {
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event dnd.EnemyEvent
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inputIndex int
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}
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type nameCanonicalization struct {
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from string
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to string
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}
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func normalizeList(input dnd.EnemyEventList, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.EnemyEventList, []contracts.Warning) {
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if input.Events == nil {
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return dnd.EnemyEventList{}, nil
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}
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records := make([]normalizedRecord, len(input.Events))
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warnings := make([]contracts.Warning, 0)
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for index, inputEvent := range input.Events {
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event, nameChange, refsChanged := normalizeEvent(inputEvent, order, registry)
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records[index] = normalizedRecord{event: event, inputIndex: index}
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if nameChange != nil {
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warnings = append(warnings, contracts.Warning{
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Scope: eventScope(index),
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ReasonCode: ReasonCodeNameCanonicalized,
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Message: fmt.Sprintf("input index %d: subject canonicalized from %s to %s",
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index, diagnostics.Quote(nameChange.from), diagnostics.Quote(nameChange.to)),
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})
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}
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if refsChanged {
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warnings = append(warnings, contracts.Warning{
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Scope: eventScope(index),
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ReasonCode: ReasonCodeSourceRefsNormalized,
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Message: fmt.Sprintf("input index %d: source references normalized (original count %d, final count %d)",
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index, len(inputEvent.SourceRefs), len(event.SourceRefs)),
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})
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}
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}
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sort.SliceStable(records, func(left, right int) bool {
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return enemyeventmodel.Less(order, records[left].event, records[right].event)
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})
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for position, record := range records {
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if position == record.inputIndex {
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continue
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}
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warnings = append(warnings, contracts.Warning{
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Scope: eventScope(record.inputIndex),
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ReasonCode: ReasonCodeEventsReordered,
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Message: fmt.Sprintf("input index %d moved to normalized position %d", record.inputIndex, position),
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})
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}
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output, duplicateWarnings := collapseDuplicates(records, order)
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warnings = append(warnings, duplicateWarnings...)
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return dnd.EnemyEventList{Events: output}, diagnostics.LimitWarnings(warnings, "enemy_events", ReasonCodeWarningsOmitted)
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}
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func normalizeEvent(input dnd.EnemyEvent, order shared.SourceRefOrder, registry *npcregistry.Registry) (dnd.EnemyEvent, *nameCanonicalization, bool) {
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output := cloneEvent(input)
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output.Name = enemyeventmodel.NormalizeDisplay(input.Name)
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if canonical, ok := registry.Lookup(output.Name); ok {
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output.Name = enemyeventmodel.NormalizeDisplay(canonical.Name)
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}
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var nameChange *nameCanonicalization
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if input.Name != output.Name {
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nameChange = &nameCanonicalization{from: input.Name, to: output.Name}
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}
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output.SourceRefs = order.Canonicalize(input.SourceRefs)
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return output, nameChange, !rawSourceRefsEqual(input.SourceRefs, output.SourceRefs)
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}
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func cloneEvent(input dnd.EnemyEvent) dnd.EnemyEvent {
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output := input
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if input.SourceRefs != nil {
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output.SourceRefs = append([]source.SourceRef(nil), input.SourceRefs...)
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}
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return output
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}
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func rawSourceRefsEqual(left, right []source.SourceRef) bool {
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if (left == nil) != (right == nil) || len(left) != len(right) {
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return false
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}
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for index := range left {
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if left[index] != right[index] {
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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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type duplicateGroup struct {
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retainedIndex int
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removed []int
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}
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func collapseDuplicates(records []normalizedRecord, order shared.SourceRefOrder) ([]dnd.EnemyEvent, []contracts.Warning) {
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if len(records) == 0 {
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return make([]dnd.EnemyEvent, 0), nil
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}
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kept := make([]normalizedRecord, 0, len(records))
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groups := make([]duplicateGroup, 0)
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for _, record := range records {
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match := -1
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for index := range kept {
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if enemyeventmodel.ExactEqual(order, kept[index].event, record.event) {
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match = index
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break
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}
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}
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if match < 0 {
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kept = append(kept, record)
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groups = append(groups, duplicateGroup{retainedIndex: record.inputIndex})
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continue
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}
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groups[match].removed = append(groups[match].removed, record.inputIndex)
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}
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output := make([]dnd.EnemyEvent, len(kept))
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for index, record := range kept {
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output[index] = cloneEvent(record.event)
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}
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warnings := make([]contracts.Warning, 0)
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for _, group := range groups {
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if len(group.removed) == 0 {
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continue
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}
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issues := make([]string, len(group.removed))
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for index, removed := range group.removed {
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issues[index] = fmt.Sprintf("removed input index %d", removed)
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}
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warnings = append(warnings, contracts.Warning{
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Scope: eventScope(group.retainedIndex),
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ReasonCode: ReasonCodeDuplicateCollapsed,
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Message: diagnostics.Aggregate(
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fmt.Sprintf("duplicate enemy event collapsed; retained input index %d", group.retainedIndex), issues),
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})
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}
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return output, warnings
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}
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func eventScope(index int) string { return fmt.Sprintf("events[%d]", index) }
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func referenceSlots() []contracts.ReferenceSlot {
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return contracts.CloneReferenceSlots([]contracts.ReferenceSlot{{
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Name: NPCRegistryReferenceSlot,
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Description: "Required normalized NPC registry used only to canonicalize enemy-subject names, never as event evidence.",
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Required: true,
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AcceptedMediaTypes: []string{"application/json"},
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AcceptedArtifactKinds: []contracts.ArtifactKind{dnd.NPCListKind},
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MaxBytes: NPCRegistryMaxBytes,
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}})
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}
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func ModuleSpec() pipeline.ModuleSpec {
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return pipeline.ModuleSpec{
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Key: Key,
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Stage: pipeline.StageNormalize,
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ExecutionClass: contracts.ExecutionClassDeterministic,
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Requires: append([]string(nil), requiredCapabilities...),
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Provides: append([]string(nil), providedCapabilities...),
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ArtifactKind: dnd.EnemyEventListKind,
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ReferenceSlots: referenceSlots(),
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}
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}
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func Register(registry *pipeline.NormalizerRegistry) error {
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return pipeline.RegisterNormalizerBuilder(registry, ModuleSpec(), validateOptions, func(request pipeline.BuildRequest) (contracts.Normalizer[dnd.EnemyEventList], 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, request.References)
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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{}, normalizerErrorf("%w", 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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func normalizerErrorf(format string, args ...any) error {
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return fmt.Errorf("dnd enemy events normalizer: "+format, args...)
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}
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