Update go dependencies

vendor/github.com/yudai/gojsondiff/formatter/delta.go

@@ -0,0 +1,124 @@
+package formatter
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+
+	diff "github.com/yudai/gojsondiff"
+)
+
+const (
+	DeltaDelete   = 0
+	DeltaTextDiff = 2
+	DeltaMove     = 3
+)
+
+func NewDeltaFormatter() *DeltaFormatter {
+	return &DeltaFormatter{
+		PrintIndent: true,
+	}
+}
+
+type DeltaFormatter struct {
+	PrintIndent bool
+}
+
+func (f *DeltaFormatter) Format(diff diff.Diff) (result string, err error) {
+	jsonObject, err := f.formatObject(diff.Deltas())
+	if err != nil {
+		return "", err
+	}
+	var resultBytes []byte
+	if f.PrintIndent {
+		resultBytes, err = json.MarshalIndent(jsonObject, "", "  ")
+	} else {
+		resultBytes, err = json.Marshal(jsonObject)
+	}
+	if err != nil {
+		return "", err
+	}
+
+	return string(resultBytes) + "\n", nil
+}
+
+func (f *DeltaFormatter) FormatAsJson(diff diff.Diff) (json map[string]interface{}, err error) {
+	return f.formatObject(diff.Deltas())
+}
+
+func (f *DeltaFormatter) formatObject(deltas []diff.Delta) (deltaJson map[string]interface{}, err error) {
+	deltaJson = map[string]interface{}{}
+	for _, delta := range deltas {
+		switch delta.(type) {
+		case *diff.Object:
+			d := delta.(*diff.Object)
+			deltaJson[d.Position.String()], err = f.formatObject(d.Deltas)
+			if err != nil {
+				return nil, err
+			}
+		case *diff.Array:
+			d := delta.(*diff.Array)
+			deltaJson[d.Position.String()], err = f.formatArray(d.Deltas)
+			if err != nil {
+				return nil, err
+			}
+		case *diff.Added:
+			d := delta.(*diff.Added)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.Value}
+		case *diff.Modified:
+			d := delta.(*diff.Modified)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.OldValue, d.NewValue}
+		case *diff.TextDiff:
+			d := delta.(*diff.TextDiff)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.DiffString(), 0, DeltaTextDiff}
+		case *diff.Deleted:
+			d := delta.(*diff.Deleted)
+			deltaJson[d.PrePosition().String()] = []interface{}{d.Value, 0, DeltaDelete}
+		case *diff.Moved:
+			return nil, errors.New("Delta type 'Move' is not supported in objects")
+		default:
+			return nil, errors.New(fmt.Sprintf("Unknown Delta type detected: %#v", delta))
+		}
+	}
+	return
+}
+
+func (f *DeltaFormatter) formatArray(deltas []diff.Delta) (deltaJson map[string]interface{}, err error) {
+	deltaJson = map[string]interface{}{
+		"_t": "a",
+	}
+	for _, delta := range deltas {
+		switch delta.(type) {
+		case *diff.Object:
+			d := delta.(*diff.Object)
+			deltaJson[d.Position.String()], err = f.formatObject(d.Deltas)
+			if err != nil {
+				return nil, err
+			}
+		case *diff.Array:
+			d := delta.(*diff.Array)
+			deltaJson[d.Position.String()], err = f.formatArray(d.Deltas)
+			if err != nil {
+				return nil, err
+			}
+		case *diff.Added:
+			d := delta.(*diff.Added)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.Value}
+		case *diff.Modified:
+			d := delta.(*diff.Modified)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.OldValue, d.NewValue}
+		case *diff.TextDiff:
+			d := delta.(*diff.TextDiff)
+			deltaJson[d.PostPosition().String()] = []interface{}{d.DiffString(), 0, DeltaTextDiff}
+		case *diff.Deleted:
+			d := delta.(*diff.Deleted)
+			deltaJson["_"+d.PrePosition().String()] = []interface{}{d.Value, 0, DeltaDelete}
+		case *diff.Moved:
+			d := delta.(*diff.Moved)
+			deltaJson["_"+d.PrePosition().String()] = []interface{}{"", d.PostPosition(), DeltaMove}
+		default:
+			return nil, errors.New(fmt.Sprintf("Unknown Delta type detected: %#v", delta))
+		}
+	}
+	return
+}