/
ctx.go
104 lines (93 loc) · 2.23 KB
/
ctx.go
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package dotenc
import (
"fmt"
"io"
"strings"
"github.com/emicklei/dot"
"github.com/goark/errs"
)
//Ctx is context class for parsing
type Ctx struct {
graph *dot.Graph
config *Config
count int
mapNode map[string]string
}
//New returns new Cxt instance
func New(conf string) (*Ctx, error) {
//parse config file
cf, err := DecodeConfig(conf)
if err != nil {
return nil, errs.Wrap(err, errs.WithContext("conf", conf))
}
return &Ctx{
graph: dot.NewGraph(dot.Directed).ID("G"),
config: cf,
count: 0,
mapNode: map[string]string{},
}, nil
}
//ImportDeps method makes graph data
func (ctx *Ctx) ImportDeps(deps ...*Dep) *Ctx {
for _, dep := range deps {
if len(dep.From) > 0 {
if len(dep.To) > 0 {
ctx.addEdgeAttr(ctx.getNode(dep.From).Edge(ctx.getNode(dep.To)))
} else {
ctx.getNode(dep.From)
}
}
}
return ctx
}
//Write method writes to io.Writer
func (ctx *Ctx) Write(w io.Writer) {
ctx.graph.Write(w)
}
func (ctx *Ctx) String() string {
return ctx.graph.String()
}
func (ctx *Ctx) getNode(label string) dot.Node {
if ctx == nil {
return dot.Node{}
}
if n, ok := ctx.mapNode[label]; ok {
return ctx.graph.Node(n)
}
ctx.count++
n := fmt.Sprintf("N%d", ctx.count)
ctx.mapNode[label] = n
return ctx.addNodeAttr(ctx.graph.Node(n)).Attr("label", strings.ReplaceAll(label, "@", "\n"))
}
func (ctx *Ctx) addNodeAttr(n dot.Node) dot.Node {
if ctx == nil || ctx.config == nil {
return n
}
for k, v := range ctx.config.Node {
n.Attr(k, v)
}
return n
}
func (ctx *Ctx) addEdgeAttr(e dot.Edge) dot.Edge {
if ctx == nil || ctx.config == nil {
return e
}
for k, v := range ctx.config.Edge {
e.Attr(k, v)
}
return e
}
/* Copyright 2020 Spiegel
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/