From fea8cd48f2e0af81475de1c0928fab27ce49275d Mon Sep 17 00:00:00 2001
From: Alex Vanin <alexey@nspcc.ru>
Date: Thu, 17 Sep 2020 12:20:35 +0300
Subject: [PATCH] [#146] sdk/object: Add structures for object search rpc call

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
---
 pkg/object/search.go      | 96 +++++++++++++++++++++++++++++++++++++++
 pkg/object/search_test.go | 53 +++++++++++++++++++++
 2 files changed, 149 insertions(+)
 create mode 100644 pkg/object/search.go
 create mode 100644 pkg/object/search_test.go

diff --git a/pkg/object/search.go b/pkg/object/search.go
new file mode 100644
index 00000000..4f7a539b
--- /dev/null
+++ b/pkg/object/search.go
@@ -0,0 +1,96 @@
+package object
+
+import (
+	v2object "github.com/nspcc-dev/neofs-api-go/v2/object"
+)
+
+// SearchMatchType indicates match operation on specified header.
+type SearchMatchType uint32
+
+const (
+	MatchUnknown SearchMatchType = iota
+	MatchStringEqual
+)
+
+func (m SearchMatchType) ToV2() v2object.MatchType {
+	switch m {
+	case MatchStringEqual:
+		return v2object.MatchStringEqual
+	default:
+		return v2object.MatchUnknown
+	}
+}
+
+func SearchMatchFromV2(t v2object.MatchType) (m SearchMatchType) {
+	switch t {
+	case v2object.MatchStringEqual:
+		m = MatchStringEqual
+	default:
+		m = MatchUnknown
+	}
+
+	return m
+}
+
+type SearchFilter struct {
+	header string
+	value  string
+	op     SearchMatchType
+}
+
+type SearchFilters []SearchFilter
+
+func (f *SearchFilter) Header() string {
+	return f.header
+}
+
+func (f *SearchFilter) Value() string {
+	return f.value
+}
+
+func (f *SearchFilter) Operation() SearchMatchType {
+	return f.op
+}
+
+func NewSearchFilters() SearchFilters {
+	return SearchFilters{}
+}
+
+func NewSearchFiltersFromV2(v2 []v2object.SearchFilter) SearchFilters {
+	filters := make(SearchFilters, 0, len(v2))
+	for i := range v2 {
+		filters = append(filters, SearchFilter{
+			header: v2[i].GetName(),
+			value:  v2[i].GetValue(),
+			op:     SearchMatchFromV2(v2[i].GetMatchType()),
+		})
+	}
+
+	return filters
+}
+
+func (f *SearchFilters) AddFilter(header, value string, op SearchMatchType) {
+	if *f == nil {
+		*f = make(SearchFilters, 0, 1)
+	}
+
+	*f = append(*f, SearchFilter{
+		header: header,
+		value:  value,
+		op:     op,
+	})
+}
+
+func (f SearchFilters) ToV2() []v2object.SearchFilter {
+	result := make([]v2object.SearchFilter, 0, len(f))
+	for i := range f {
+		v2 := v2object.SearchFilter{}
+		v2.SetName(f[i].header)
+		v2.SetValue(f[i].value)
+		v2.SetMatchType(f[i].op.ToV2())
+
+		result = append(result, v2)
+	}
+
+	return result
+}
diff --git a/pkg/object/search_test.go b/pkg/object/search_test.go
new file mode 100644
index 00000000..99fb139a
--- /dev/null
+++ b/pkg/object/search_test.go
@@ -0,0 +1,53 @@
+package object_test
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/object"
+	v2object "github.com/nspcc-dev/neofs-api-go/v2/object"
+	"github.com/stretchr/testify/require"
+)
+
+var (
+	eqV2Matches = map[object.SearchMatchType]v2object.MatchType{
+		object.MatchUnknown:     v2object.MatchUnknown,
+		object.MatchStringEqual: v2object.MatchStringEqual,
+	}
+)
+
+func TestMatch(t *testing.T) {
+	t.Run("known matches", func(t *testing.T) {
+		for i := object.MatchUnknown; i <= object.MatchStringEqual; i++ {
+			require.Equal(t, eqV2Matches[i], i.ToV2())
+			require.Equal(t, object.SearchMatchFromV2(i.ToV2()), i)
+		}
+	})
+
+	t.Run("unknown matches", func(t *testing.T) {
+		require.Equal(t, (object.MatchStringEqual + 1).ToV2(), v2object.MatchUnknown)
+		require.Equal(t, object.SearchMatchFromV2(v2object.MatchStringEqual+1), object.MatchUnknown)
+	})
+}
+
+func TestFilter(t *testing.T) {
+	inputs := [][]string{
+		{"user-header", "user-value"},
+		{object.HdrSysNameID, "objectID"},
+	}
+
+	filters := object.NewSearchFilters()
+	for i := range inputs {
+		filters.AddFilter(inputs[i][0], inputs[i][1], object.MatchStringEqual)
+	}
+
+	require.Len(t, filters, len(inputs))
+	for i := range inputs {
+		require.Equal(t, inputs[i][0], filters[i].Header())
+		require.Equal(t, inputs[i][1], filters[i].Value())
+		require.Equal(t, object.MatchStringEqual, filters[i].Operation())
+	}
+
+	v2 := filters.ToV2()
+	newFilters := object.NewSearchFiltersFromV2(v2)
+	require.Equal(t, filters, newFilters)
+}