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graphviz_storage.go
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graphviz_storage.go
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// Copyright (C) 2021 CGI France
//
// This file is part of LINO.
//
// LINO 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.
//
// LINO 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 LINO. If not, see <http://www.gnu.org/licenses/>.
package id
import (
"io/ioutil"
"strconv"
"github.com/awalterschulze/gographviz"
"github.com/cgi-fr/lino/pkg/id"
)
// DOTStorage provides storage in a graphviz DOT format
type DOTStorage struct{}
// NewDOTStorage create a new DOT storage
func NewDOTStorage() *DOTStorage {
return &DOTStorage{}
}
// Store ingress descriptor in the DOT file
func (s *DOTStorage) Store(idef id.IngressDescriptor) *id.Error {
graphName := strconv.Quote(idef.StartTable().Name())
graph := gographviz.NewGraph()
err := graph.SetName(graphName)
if err != nil {
return &id.Error{Description: err.Error()}
}
err = graph.SetDir(true)
if err != nil {
return &id.Error{Description: err.Error()}
}
for i := uint(0); i < idef.Relations().Len(); i++ {
r := idef.Relations().Relation(i)
src := strconv.Quote(r.Parent().Name())
dst := strconv.Quote(r.Child().Name())
err = graph.AddNode(graphName, src, nil)
if err != nil {
return &id.Error{Description: err.Error()}
}
err = graph.AddNode(graphName, dst, nil)
if err != nil {
return &id.Error{Description: err.Error()}
}
err = graph.AddEdge(src, dst, true, nil)
if err != nil {
return &id.Error{Description: err.Error()}
}
}
err = ioutil.WriteFile("ingress-descriptor.dot", []byte(graph.String()), 0600)
if err != nil {
return &id.Error{Description: err.Error()}
}
return nil
}
func (s *DOTStorage) Read() (id.IngressDescriptor, *id.Error) {
return nil, &id.Error{Description: "Not implemented"}
}