From 20ef0d92694465ac86b550df139e8366a0a2b4fa Mon Sep 17 00:00:00 2001
From: mo khan <mo@mokhan.ca>
Date: Tue, 22 Jul 2025 17:35:49 -0600
Subject: feat: connect to spicedb

---
 .../authzed/spicedb/pkg/diff/caveats/diff.go       | 164 +++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 vendor/github.com/authzed/spicedb/pkg/diff/caveats/diff.go

(limited to 'vendor/github.com/authzed/spicedb/pkg/diff/caveats/diff.go')

diff --git a/vendor/github.com/authzed/spicedb/pkg/diff/caveats/diff.go b/vendor/github.com/authzed/spicedb/pkg/diff/caveats/diff.go
new file mode 100644
index 0000000..74e196b
--- /dev/null
+++ b/vendor/github.com/authzed/spicedb/pkg/diff/caveats/diff.go
@@ -0,0 +1,164 @@
+package caveats
+
+import (
+	"bytes"
+
+	"golang.org/x/exp/maps"
+	"golang.org/x/exp/slices"
+
+	caveattypes "github.com/authzed/spicedb/pkg/caveats/types"
+	"github.com/authzed/spicedb/pkg/genutil/mapz"
+	nspkg "github.com/authzed/spicedb/pkg/namespace"
+	core "github.com/authzed/spicedb/pkg/proto/core/v1"
+)
+
+// DeltaType defines the type of caveat deltas.
+type DeltaType string
+
+const (
+	// CaveatAdded indicates that the caveat was newly added/created.
+	CaveatAdded DeltaType = "caveat-added"
+
+	// CaveatRemoved indicates that the caveat was removed.
+	CaveatRemoved DeltaType = "caveat-removed"
+
+	// CaveatCommentsChanged indicates that the comment(s) on the caveat were changed.
+	CaveatCommentsChanged DeltaType = "caveat-comments-changed"
+
+	// AddedParameter indicates that the parameter was added to the caveat.
+	AddedParameter DeltaType = "added-parameter"
+
+	// RemovedParameter indicates that the parameter was removed from the caveat.
+	RemovedParameter DeltaType = "removed-parameter"
+
+	// ParameterTypeChanged indicates that the type of the parameter was changed.
+	ParameterTypeChanged DeltaType = "parameter-type-changed"
+
+	// CaveatExpressionChanged indicates that the expression of the caveat has changed.
+	CaveatExpressionChanged DeltaType = "expression-has-changed"
+)
+
+// Diff holds the diff between two caveats.
+type Diff struct {
+	existing *core.CaveatDefinition
+	updated  *core.CaveatDefinition
+	deltas   []Delta
+}
+
+// Deltas returns the deltas between the two caveats.
+func (cd Diff) Deltas() []Delta {
+	return cd.deltas
+}
+
+// Delta holds a single change of a caveat.
+type Delta struct {
+	// Type is the type of this delta.
+	Type DeltaType
+
+	// ParameterName is the name of the parameter to which this delta applies, if any.
+	ParameterName string
+
+	// PreviousType is the previous type of the parameter changed, if any.
+	PreviousType *core.CaveatTypeReference
+
+	// CurrentType is the current type of the parameter changed, if any.
+	CurrentType *core.CaveatTypeReference
+}
+
+// DiffCaveats performs a diff between two caveat definitions. One or both of the definitions
+// can be `nil`, which will be treated as an add/remove as applicable.
+func DiffCaveats(existing *core.CaveatDefinition, updated *core.CaveatDefinition, caveatTypeSet *caveattypes.TypeSet) (*Diff, error) {
+	// Check for the caveats themselves.
+	if existing == nil && updated == nil {
+		return &Diff{existing, updated, []Delta{}}, nil
+	}
+
+	if existing != nil && updated == nil {
+		return &Diff{
+			existing: existing,
+			updated:  updated,
+			deltas: []Delta{
+				{
+					Type: CaveatRemoved,
+				},
+			},
+		}, nil
+	}
+
+	if existing == nil && updated != nil {
+		return &Diff{
+			existing: existing,
+			updated:  updated,
+			deltas: []Delta{
+				{
+					Type: CaveatAdded,
+				},
+			},
+		}, nil
+	}
+
+	deltas := make([]Delta, 0, len(existing.ParameterTypes)+len(updated.ParameterTypes))
+
+	// Check the caveats's comments.
+	existingComments := nspkg.GetComments(existing.Metadata)
+	updatedComments := nspkg.GetComments(updated.Metadata)
+	if !slices.Equal(existingComments, updatedComments) {
+		deltas = append(deltas, Delta{
+			Type: CaveatCommentsChanged,
+		})
+	}
+
+	existingParameterNames := mapz.NewSet(maps.Keys(existing.ParameterTypes)...)
+	updatedParameterNames := mapz.NewSet(maps.Keys(updated.ParameterTypes)...)
+
+	for _, removed := range existingParameterNames.Subtract(updatedParameterNames).AsSlice() {
+		deltas = append(deltas, Delta{
+			Type:          RemovedParameter,
+			ParameterName: removed,
+		})
+	}
+
+	for _, added := range updatedParameterNames.Subtract(existingParameterNames).AsSlice() {
+		deltas = append(deltas, Delta{
+			Type:          AddedParameter,
+			ParameterName: added,
+		})
+	}
+
+	for _, shared := range existingParameterNames.Intersect(updatedParameterNames).AsSlice() {
+		existingParamType := existing.ParameterTypes[shared]
+		updatedParamType := updated.ParameterTypes[shared]
+
+		existingType, err := caveattypes.DecodeParameterType(caveatTypeSet, existingParamType)
+		if err != nil {
+			return nil, err
+		}
+
+		updatedType, err := caveattypes.DecodeParameterType(caveatTypeSet, updatedParamType)
+		if err != nil {
+			return nil, err
+		}
+
+		// Compare types.
+		if existingType.String() != updatedType.String() {
+			deltas = append(deltas, Delta{
+				Type:          ParameterTypeChanged,
+				ParameterName: shared,
+				PreviousType:  existingParamType,
+				CurrentType:   updatedParamType,
+			})
+		}
+	}
+
+	if !bytes.Equal(existing.SerializedExpression, updated.SerializedExpression) {
+		deltas = append(deltas, Delta{
+			Type: CaveatExpressionChanged,
+		})
+	}
+
+	return &Diff{
+		existing: existing,
+		updated:  updated,
+		deltas:   deltas,
+	}, nil
+}
-- 
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