Add support for SortRange request

service.go

@@ -190,6 +190,16 @@ func (s *Service) DeleteSheet(spreadsheet *Spreadsheet, sheetID uint) (err error
 	return
 }
 
+// Sort sorts cells in the sheet
+func (s *Service) SortRange(sheet *Sheet, fromCol int, toCol int, fromRow int, toRow int, sortCols ...SortColumn) (err error) {
+	r, err := newUpdateRequest(sheet.Spreadsheet)
+	if err != nil {
+		return
+	}
+	err = r.SortRange(sheet, fromCol, toCol, fromRow, toRow, sortCols...).Do()
+	return
+}
+
 // SyncSheet updates sheet
 func (s *Service) SyncSheet(sheet *Sheet) (err error) {
 	if sheet.newMaxRow > sheet.Properties.GridProperties.RowCount ||

sheet.go

@@ -150,6 +150,21 @@ func (sheet *Sheet) DeleteColumns(start, end int) (err error) {
 	return
 }
 
+// Sorting order
+const SortOrderAscending = "ASCENDING"
+const SortOrderDescending = "DESCENDING"
+
+type SortColumn struct {
+	Index int
+	Order string
+}
+
+// Sort sorts cells in the sheet
+func (sheet *Sheet) Sort(fromCol int, toCol int, fromRow int, toRow int, sortCols ...SortColumn) (err error) {
+	err = sheet.Spreadsheet.service.SortRange(sheet, fromCol, toCol, fromRow, toRow, sortCols...)
+	return
+}
+
 // Synchronize reflects the changes of the sheet.
 func (sheet *Sheet) Synchronize() (err error) {
 	err = sheet.Spreadsheet.service.SyncSheet(sheet)

update_request.go

@@ -298,8 +298,28 @@ func (r *updateRequest) DeleteConditionalFormatRule() {
 
 }
 
-func (r *updateRequest) SortRange() {
+func (r *updateRequest) SortRange(sheet *Sheet, fromCol int, toCol int, fromRow int, toRow int, sortCols ...SortColumn) (ret *updateRequest) {
+	sortSpecs := make([]map[string]interface{}, len(sortCols))
+	for _, sc := range sortCols {
+		sortSpecs = append(sortSpecs, map[string]interface{}{
+			"sortOrder":      sc.Order,
+			"dimensionIndex": sc.Index,
+		})
+	}
 
+	r.body["requests"] = append(r.body["requests"], map[string]interface{}{
+		"sortRange": map[string]interface{}{
+			"range": map[string]interface{}{
+				"sheetId":          sheet.Properties.ID,
+				"startRowIndex":    fromRow,
+				"endRowIndex":      toRow,
+				"startColumnIndex": fromCol,
+				"endColumnIndex":   toCol,
+			},
+			"sortSpecs": sortSpecs,
+		},
+	})
+	return r
 }
 
 func (r *updateRequest) SetDataValidation() {