code.vegaprotocol.io/vega@v0.79.0/datanode/gateway/graphql/marshallers/int32.go (about)

     1  // Copyright (C) 2023 Gobalsky Labs Limited
     2  //
     3  // This program is free software: you can redistribute it and/or modify
     4  // it under the terms of the GNU Affero General Public License as
     5  // published by the Free Software Foundation, either version 3 of the
     6  // License, or (at your option) any later version.
     7  //
     8  // This program is distributed in the hope that it will be useful,
     9  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    10  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11  // GNU Affero General Public License for more details.
    12  //
    13  // You should have received a copy of the GNU Affero General Public License
    14  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    15  
    16  package marshallers
    17  
    18  import (
    19  	"fmt"
    20  	"io"
    21  	"strconv"
    22  
    23  	"github.com/99designs/gqlgen/graphql"
    24  )
    25  
    26  func MarshalUint32(t uint32) graphql.Marshaler {
    27  	return graphql.WriterFunc(func(w io.Writer) {
    28  		io.WriteString(w, fmt.Sprint(t))
    29  	})
    30  }
    31  
    32  func UnmarshalUint32(v interface{}) (uint32, error) {
    33  	s, ok := v.(string)
    34  	if !ok {
    35  		return 0, fmt.Errorf("Expected uint32 to be a string")
    36  	}
    37  
    38  	value64, err := strconv.ParseUint(s, 10, 32)
    39  	if err != nil {
    40  		return 0, fmt.Errorf("Couldn't parse value into uint32")
    41  	}
    42  
    43  	return uint32(value64), nil
    44  }