Move NPC registry to canonical namespace

internal/modules/dnd/validate/npcregistry/shape/validator.go

@@ -0,0 +1,96 @@
+package shape
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd/shared/diagnostics"
+)
+
+const (
+	Key        = "extract/dnd/npc-registry/shape"
+	ReasonCode = "invalid_npc_shape"
+	policy     = "dnd.npc_registry.validator.shape.v1"
+)
+
+type Options struct{}
+type Validator struct{}
+
+var _ contracts.TypedValidator[dnd.NPCRegistry] = (*Validator)(nil)
+var _ pipeline.CheckpointFingerprintProvider = (*Validator)(nil)
+
+func New(Options) *Validator      { return &Validator{} }
+func (v *Validator) Name() string { return Key }
+func (v *Validator) ExecutionClass() contracts.ExecutionClass {
+	return contracts.ExecutionClassDeterministic
+}
+func (v *Validator) CheckpointFingerprints() []pipeline.CheckpointFingerprint {
+	return []pipeline.CheckpointFingerprint{{Name: "policy", Value: policy}}
+}
+
+func (v *Validator) Validate(_ context.Context, req contracts.TypedValidationRequest[dnd.NPCRegistry]) (contracts.ValidationResult, error) {
+	issues := issuesFor(req.Value)
+	if len(issues) > 0 {
+		return rejection(diagnostics.Aggregate("invalid NPC shape", issues)), nil
+	}
+	return contracts.ValidationResult{Approved: true}, nil
+}
+
+func Validate(value dnd.NPCRegistry) error {
+	issues := issuesFor(value)
+	if len(issues) == 0 {
+		return nil
+	}
+	return fmt.Errorf("%s", diagnostics.Aggregate("invalid NPC shape", issues))
+}
+
+func issuesFor(value dnd.NPCRegistry) []string {
+	issues := make([]string, 0)
+	if value.NPCs == nil {
+		return []string{"npcs must be present"}
+	}
+	for index, npc := range value.NPCs {
+		prefix := fmt.Sprintf("npcs[%d]", index)
+		if strings.TrimSpace(npc.ID) == "" {
+			issues = append(issues, prefix+".id must not be empty")
+		}
+		if strings.TrimSpace(npc.Name) == "" {
+			issues = append(issues, prefix+".name must not be empty")
+		}
+		if len(npc.SourceRefs) == 0 {
+			issues = append(issues, prefix+".source_refs must not be empty")
+		}
+	}
+	return issues
+}
+
+func Spec() pipeline.ValidatorSpec {
+	return pipeline.ValidatorSpec{Key: Key, ExecutionClass: contracts.ExecutionClassDeterministic}
+}
+
+func Register(registry *pipeline.ValidatorRegistry) error {
+	return pipeline.RegisterTypedValidatorBuilder(registry, dnd.NPCRegistryKind, Spec(), validateOptions, func(request pipeline.BuildRequest) (contracts.TypedValidator[dnd.NPCRegistry], error) {
+		options, err := DecodeOptions(request.Options)
+		if err != nil {
+			return nil, err
+		}
+		return New(options), nil
+	})
+}
+
+func DecodeOptions(options map[string]any) (Options, error) {
+	if err := pipeline.RejectUnknownOptions(options); err != nil {
+		return Options{}, err
+	}
+	return Options{}, nil
+}
+
+func validateOptions(options map[string]any) error { _, err := DecodeOptions(options); return err }
+
+func rejection(message string) contracts.ValidationResult {
+	return contracts.ValidationResult{Approved: false, ReasonCode: ReasonCode, Message: message}
+}