path: root/simulation/marshaller.go

// Copyright 2018 The dexon-consensus-core Authors
// This file is part of the dexon-consensus-core library.
//
// The dexon-consensus-core library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus-core library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus-core library. If not, see
// <http://www.gnu.org/licenses/>.

package simulation

import (
    "encoding/json"
    "fmt"

    "github.com/dexon-foundation/dexon-consensus-core/core/types"
)

// jsonMarshaller implements test.Marshaller to marshal simulation related
// messages.
type jsonMarshaller struct{}

// Unmarshal implements Unmarshal method of test.Marshaller interface.
func (m *jsonMarshaller) Unmarshal(
    msgType string, payload []byte) (msg interface{}, err error) {

    switch msgType {
    case "blocklist":
        var blocks BlockList
        if err = json.Unmarshal(payload, &blocks); err != nil {
            break
        }
        msg = &blocks
    case "message":
        var m message
        if err = json.Unmarshal(payload, &m); err != nil {
            break
        }
        msg = &m
    case "info-status":
        var status infoStatus
        if err = json.Unmarshal(payload, &status); err != nil {
            break
        }
        msg = status
    case "block":
        block := &types.Block{}
        if err = json.Unmarshal(payload, block); err != nil {
            break
        }
        msg = block
    case "witness-ack":
        nAck := &types.WitnessAck{}
        if err = json.Unmarshal(payload, nAck); err != nil {
            break
        }
        msg = nAck
    case "vote":
        vote := &types.Vote{}
        if err = json.Unmarshal(payload, vote); err != nil {
            break
        }
        msg = vote
    case "dkg-private-share":
        privateShare := &types.DKGPrivateShare{}
        if err = json.Unmarshal(payload, privateShare); err != nil {
            break
        }
        msg = privateShare
    case "dkg-master-public-key":
        masterPublicKey := &types.DKGMasterPublicKey{}
        if err = json.Unmarshal(payload, masterPublicKey); err != nil {
            break
        }
        msg = masterPublicKey
    case "dkg-complaint":
        complaint := &types.DKGComplaint{}
        if err = json.Unmarshal(payload, complaint); err != nil {
            break
        }
        msg = complaint
    default:
        err = fmt.Errorf("unrecognized message type: %v", msgType)
    }
    if err != nil {
        return
    }
    return
}

// Marshal implements Marshal method of test.Marshaller interface.
func (m *jsonMarshaller) Marshal(msg interface{}) (
    msgType string, payload []byte, err error) {

    switch msg.(type) {
    case *BlockList:
        msgType = "blocklist"
    case *message:
        msgType = "message"
    case infoStatus:
        msgType = "info-status"
    case *types.Block:
        msgType = "block"
    case *types.WitnessAck:
        msgType = "witness-ack"
    case *types.Vote:
        msgType = "vote"
    case *types.DKGPrivateShare:
        msgType = "dkg-private-share"
    case *types.DKGMasterPublicKey:
        msgType = "dkg-master-public-key"
    case *types.DKGComplaint:
        msgType = "dkg-complaint"
    default:
        err = fmt.Errorf("unknwon message type: %v", msg)
    }
    if err != nil {
        return
    }
    payload, err = json.Marshal(msg)
    return
}