WIP - Implement branchable collections

internal/core/crdt/collection.go

@@ -0,0 +1,50 @@
+// Copyright 2024 Democratized Data Foundation
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+package crdt
+
+import (
+	"context"
+
+	"github.com/sourcenetwork/defradb/internal/core"
+)
+
+type CollectionDelta struct {
+	Priority uint64
+	// todo: This is temporary pending a global collection id (link to ticket)
+	SchemaVersionID string
+}
+
+var _ core.Delta = (*CollectionDelta)(nil)
+var _ core.ReplicatedData = (*CollectionDelta)(nil)
+
+func (delta *CollectionDelta) IPLDSchemaBytes() []byte { //todo
+	return []byte(`
+	type CounterDelta struct {
+		docID     		Bytes
+		fieldName 		String
+		priority  		Int
+		nonce 			Int
+		schemaVersionID String
+		data            Bytes
+	}`)
+}
+
+func (d *CollectionDelta) GetPriority() uint64 {
+	panic("todo")
+}
+
+func (d *CollectionDelta) SetPriority(uint64) {
+	panic("todo")
+}
+
+func (d *CollectionDelta) Merge(ctx context.Context, other core.Delta) error {
+	panic("todo")
+}