snapshot of https://github.com/ory/keto.git (master, 2026-09-16; blobs > 131072B omitted)

internal/namespace/ast/ast_definitions.go

@@ -0,0 +1,73 @@
+// Copyright © 2023 Ory Corp
+// SPDX-License-Identifier: Apache-2.0
+
+package ast
+
+import "encoding/json"
+
+type (
+	Relation struct {
+		Name              string             `json:"name"`
+		Types             []RelationType     `json:"types,omitempty"`
+		SubjectSetRewrite *SubjectSetRewrite `json:"rewrite,omitempty"`
+	}
+
+	RelationType struct {
+		Namespace string `json:"namespace"`
+		Relation  string `json:"relation,omitempty"` // optional
+	}
+
+	SubjectSetRewrite struct {
+		Operation Operator `json:"operator"`
+		Children  Children `json:"children"`
+	}
+
+	Children = []Child
+
+	// Child are all possible types of subject-set rewrites.
+	Child interface {
+		// AsRewrite returns the child as a subject-set rewrite, as relations
+		// require a top-level rewrite, even if just one child was parsed.
+		AsRewrite() *SubjectSetRewrite
+		// EstimatedSize approximates the memory in bytes retained by the node.
+		EstimatedSize() int64
+	}
+
+	ComputedSubjectSet struct {
+		Relation string `json:"relation"`
+	}
+
+	TupleToSubjectSet struct {
+		Relation                   string `json:"relation"`
+		ComputedSubjectSetRelation string `json:"computed_subject_set_relation"`
+	}
+
+	// InvertResult inverts the check result of the child.
+	InvertResult struct {
+		Child Child `json:"inverted"`
+	}
+)
+
+type Operator int
+
+//go:generate stringer -type=Operator -linecomment
+const (
+	OperatorOr  Operator = iota // or
+	OperatorAnd                 // and
+)
+
+func (i Operator) MarshalJSON() ([]byte, error) {
+	return json.Marshal(i.String())
+
+}
+
+func (r *SubjectSetRewrite) AsRewrite() *SubjectSetRewrite { return r }
+func (c *ComputedSubjectSet) AsRewrite() *SubjectSetRewrite {
+	return &SubjectSetRewrite{Children: []Child{c}}
+}
+func (t *TupleToSubjectSet) AsRewrite() *SubjectSetRewrite {
+	return &SubjectSetRewrite{Children: []Child{t}}
+}
+func (i *InvertResult) AsRewrite() *SubjectSetRewrite {
+	return &SubjectSetRewrite{Children: []Child{i}}
+}