Add NPC interaction validators

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

@@ -0,0 +1,106 @@
+// Package shape validates required D&D NPC interaction candidate fields.
+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-interactions/shape"
+	ReasonCode = "invalid_npc_interaction_shape"
+	policy     = "dnd.npc_interactions.validator.shape.v1"
+)
+
+type Options struct{}
+type Validator struct{}
+
+var _ contracts.TypedValidator[dnd.NPCInteractionList] = (*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.NPCInteractionList]) (contracts.ValidationResult, error) {
+	if err := Validate(req.Value); err != nil {
+		return contracts.ValidationResult{Approved: false, ReasonCode: ReasonCode, Message: err.Error()}, nil
+	}
+	return contracts.ValidationResult{Approved: true}, nil
+}
+
+func Validate(value dnd.NPCInteractionList) error {
+	issues := issuesFor(value)
+	if len(issues) == 0 {
+		return nil
+	}
+	return fmt.Errorf("%s", diagnostics.Aggregate("invalid NPC interaction shape", issues))
+}
+
+func issuesFor(value dnd.NPCInteractionList) []string {
+	if value.Interactions == nil {
+		return []string{"interactions must be present"}
+	}
+	issues := make([]string, 0)
+	for index, interaction := range value.Interactions {
+		prefix := fmt.Sprintf("interactions[%d]", index)
+		if strings.TrimSpace(interaction.Name) == "" {
+			issues = append(issues, prefix+".name must not be empty: "+diagnostics.Quote(interaction.Name))
+		}
+		if !validKind(interaction.Kind) {
+			issues = append(issues, prefix+".kind is unsupported: "+diagnostics.Quote(string(interaction.Kind)))
+		}
+		if len(interaction.SourceRefs) == 0 {
+			issues = append(issues, prefix+".source_refs must contain at least one reference")
+		}
+	}
+	return issues
+}
+
+func validKind(value dnd.NPCInteractionKind) bool {
+	switch value {
+	case dnd.NPCInteractionKindMentioned,
+		dnd.NPCInteractionKindNoncombatPresence,
+		dnd.NPCInteractionKindDialogue,
+		dnd.NPCInteractionKindCombatAlly,
+		dnd.NPCInteractionKindCombatOpponent,
+		dnd.NPCInteractionKindOther:
+		return true
+	default:
+		return false
+	}
+}
+
+func Spec() pipeline.ValidatorSpec {
+	return pipeline.ValidatorSpec{Key: Key, ExecutionClass: contracts.ExecutionClassDeterministic}
+}
+
+func Register(registry *pipeline.ValidatorRegistry) error {
+	return pipeline.RegisterTypedValidatorBuilder(registry, dnd.NPCInteractionListKind, Spec(), validateOptions, func(request pipeline.BuildRequest) (contracts.TypedValidator[dnd.NPCInteractionList], 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 }

internal/modules/dnd/validate/npcinteractions/shape/validator_test.go

@@ -0,0 +1,70 @@
+package shape
+
+import (
+	"context"
+	"reflect"
+	"strings"
+	"testing"
+	"unicode/utf8"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/core/source"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+	"gitea.maximumdirect.net/eric/notarius/internal/modules/dnd"
+)
+
+func TestValidatorOwnsRequiredNameKindAndEvidence(t *testing.T) {
+	valid := validList()
+	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.NPCInteractionList]{Value: valid})
+	if err != nil || !result.Approved {
+		t.Fatalf("Validate() = %#v, %v", result, err)
+	}
+	for _, test := range []struct {
+		name  string
+		value dnd.NPCInteractionList
+		want  string
+	}{
+		{"missing interactions", dnd.NPCInteractionList{}, "interactions must be present"},
+		{"blank name", dnd.NPCInteractionList{Interactions: []dnd.NPCInteraction{{Name: " ", Kind: dnd.NPCInteractionKindDialogue, SourceRefs: valid.Interactions[0].SourceRefs}}}, "name must not be empty"},
+		{"unsupported kind", dnd.NPCInteractionList{Interactions: []dnd.NPCInteraction{{Name: "Mira Thorn", Kind: "unsupported", SourceRefs: valid.Interactions[0].SourceRefs}}}, "kind is unsupported"},
+		{"missing evidence", dnd.NPCInteractionList{Interactions: []dnd.NPCInteraction{{Name: "Mira Thorn", Kind: dnd.NPCInteractionKindDialogue}}}, "source_refs must contain"},
+	} {
+		t.Run(test.name, func(t *testing.T) {
+			result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.NPCInteractionList]{Value: test.value})
+			if err != nil || result.Approved || result.ReasonCode != ReasonCode || !strings.Contains(result.Message, test.want) {
+				t.Fatalf("Validate() = %#v, %v; want %q", result, err, test.want)
+			}
+		})
+	}
+}
+
+func TestValidatorBoundsDiagnosticsPreservesValueAndRegistersTypedContract(t *testing.T) {
+	value := dnd.NPCInteractionList{Interactions: make([]dnd.NPCInteraction, 24)}
+	for index := range value.Interactions {
+		value.Interactions[index] = dnd.NPCInteraction{Name: strings.Repeat("火", 220) + "\n", Kind: "unsupported"}
+	}
+	result, err := New(Options{}).Validate(context.Background(), contracts.TypedValidationRequest[dnd.NPCInteractionList]{Value: value})
+	if err != nil || result.Approved || len([]byte(result.Message)) > 4096 || !utf8.ValidString(result.Message) || !strings.Contains(result.Message, "additional issue(s) omitted") {
+		t.Fatalf("Validate() = %#v, %v", result, err)
+	}
+	if value.Interactions[0].Name != strings.Repeat("火", 220)+"\n" {
+		t.Fatal("Validate() mutated input")
+	}
+	if got := New(Options{}).CheckpointFingerprints(); !reflect.DeepEqual(got, []pipeline.CheckpointFingerprint{{Name: "policy", Value: policy}}) {
+		t.Fatalf("CheckpointFingerprints() = %#v", got)
+	}
+	registry := pipeline.NewValidatorRegistry()
+	if err := Register(registry); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := DecodeOptions(map[string]any{"unexpected": true}); err == nil {
+		t.Fatal("DecodeOptions() accepted unknown option")
+	}
+}
+
+func validList() dnd.NPCInteractionList {
+	return dnd.NPCInteractionList{Interactions: []dnd.NPCInteraction{{
+		Name: "Mira Thorn", Kind: dnd.NPCInteractionKindDialogue,
+		SourceRefs: []source.SourceRef{{SourceID: "session", StartUnitID: 1, EndUnitID: 1}},
+	}}}
+}