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messageProtocol.go
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messageProtocol.go
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// Copyright © 2018 J. Strobus White.
// This file is part of the blocktop blockchain development kit.
//
// Blocktop is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Blocktop 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with blocktop. If not, see <http://www.gnu.org/licenses/>.
package spec
import (
"fmt"
"strings"
)
// MessageProtocol is a string that identifies a messaging protocol. The canonical form is:
// /<blockchain type>/<resource type>/<component type>/<version>
// For example:
// /blocktop/block/luckyblock/v1
// /blocktop/transaction/exchange/v2
type MessageProtocol struct {
protocol string
blockchainName string
resourceType string
componentName string
version string
}
const (
ResourceTypeBlock string = "block"
ResourceTypeTransaction string = "transaction"
)
func NewProtocol(value string) *MessageProtocol {
p := &MessageProtocol{}
if !p.SetValue(value) {
return nil
}
return p
}
func NewProtocolParts(blockchainName string, resourceType string, componentName string, version string) *MessageProtocol {
p := &MessageProtocol{}
p.SetBlockchainName(blockchainName)
p.SetResourceType(resourceType)
p.SetComponentName(componentName)
p.SetVersion(version)
return p
}
func NewProtocolMarshalled(blockchainName string, m Marshalled) *MessageProtocol {
p := &MessageProtocol{}
p.SetBlockchainName(blockchainName)
p.SetResourceType(m.ResourceType())
p.SetComponentName(FullyQualifiedName(m))
p.SetVersion(m.Version())
return p
}
func (p *MessageProtocol) String() string {
return p.protocol
}
func (p *MessageProtocol) SetValue(value string) (ok bool) {
parts := strings.Split(strings.ToLower(value), "/")
if len(parts) != 5 {
return false
}
p.blockchainName = parts[1]
p.resourceType = parts[2]
p.componentName = parts[3]
p.version = parts[4]
p.formatValue()
return true
}
func (p *MessageProtocol) formatValue() {
p.protocol = fmt.Sprintf("/%s/%s/%s/%s", p.blockchainName, p.resourceType, p.componentName, p.version)
}
func (p *MessageProtocol) BlockchainName() string {
return p.blockchainName
}
func (p *MessageProtocol) SetBlockchainName(blockchainName string) {
p.blockchainName = strings.ToLower(blockchainName)
p.formatValue()
}
func (p *MessageProtocol) ResourceType() string {
return p.resourceType
}
func (p *MessageProtocol) SetResourceType(resourceType string) {
p.resourceType = strings.ToLower(resourceType)
p.formatValue()
}
func (p *MessageProtocol) ComponentName() string {
return p.componentName
}
func (p *MessageProtocol) SetComponentName(componentName string) {
p.componentName = strings.ToLower(componentName)
p.formatValue()
}
func (p *MessageProtocol) Version() string {
return p.version
}
func (p *MessageProtocol) SetVersion(version string) {
p.version = strings.ToLower(version)
p.formatValue()
}
func (p *MessageProtocol) IsValid() bool {
if p.resourceType == ResourceTypeBlock ||
p.resourceType == ResourceTypeTransaction {
return true
}
return false
}