feat: Implements the basic schema for Policy

Adds the basic schema for the policy

Signed-off-by: Kairo Araujo <[email protected]>

ent/schema/attestationpolicy.go

@@ -0,0 +1,56 @@
+// Copyright 2024 The Archivista Contributors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package schema
+
+import (
+	"entgo.io/contrib/entgql"
+	"entgo.io/ent"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// Attestation represents an attestation from a witness attestation collection
+type AttestationPolicy struct {
+	ent.Schema
+}
+
+func (AttestationPolicy) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("name").NotEmpty(),
+	}
+}
+
+// Edges of the AttestationPolicy.
+func (AttestationPolicy) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("statement", Statement.Type).
+			Ref("policies").Unique(),
+	}
+}
+
+func (AttestationPolicy) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("name"),
+	}
+}
+
+func (AttestationPolicy) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entgql.RelayConnection(),
+		entgql.QueryField(),
+	}
+}

ent/schema/statement.go

@@ -38,6 +38,7 @@ func (Statement) Fields() []ent.Field {
 func (Statement) Edges() []ent.Edge {
 	return []ent.Edge{
 		edge.To("subjects", Subject.Type).Annotations(entgql.RelayConnection()),
+		edge.To("policies", AttestationPolicy.Type).Annotations(entgql.RelayConnection()),
 		edge.To("attestation_collections", AttestationCollection.Type).Unique(),
 
 		edge.From("dsse", Dsse.Type).Ref("statement"),