1 package debug
2
3 import (
4 "bytes"
5 "fmt"
6 "github.com/gobwas/glob/match"
7 "math/rand"
8 )
9
10 func Graphviz(pattern string, m match.Matcher) string {
11 return fmt.Sprintf(`digraph G {graph[label="%s"];%s}`, pattern, graphviz_internal(m, fmt.Sprintf("%x", rand.Int63())))
12 }
13
14 func graphviz_internal(m match.Matcher, id string) string {
15 buf := &bytes.Buffer{}
16
17 switch matcher := m.(type) {
18 case match.BTree:
19 fmt.Fprintf(buf, `"%s"[label="%s"];`, id, matcher.Value.String())
20 for _, m := range []match.Matcher{matcher.Left, matcher.Right} {
21 switch n := m.(type) {
22 case nil:
23 rnd := rand.Int63()
24 fmt.Fprintf(buf, `"%x"[label="<nil>"];`, rnd)
25 fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
26
27 default:
28 sub := fmt.Sprintf("%x", rand.Int63())
29 fmt.Fprintf(buf, `"%s"->"%s";`, id, sub)
30 fmt.Fprintf(buf, graphviz_internal(n, sub))
31 }
32 }
33
34 case match.AnyOf:
35 fmt.Fprintf(buf, `"%s"[label="AnyOf"];`, id)
36 for _, m := range matcher.Matchers {
37 rnd := rand.Int63()
38 fmt.Fprintf(buf, graphviz_internal(m, fmt.Sprintf("%x", rnd)))
39 fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
40 }
41
42 case match.EveryOf:
43 fmt.Fprintf(buf, `"%s"[label="EveryOf"];`, id)
44 for _, m := range matcher.Matchers {
45 rnd := rand.Int63()
46 fmt.Fprintf(buf, graphviz_internal(m, fmt.Sprintf("%x", rnd)))
47 fmt.Fprintf(buf, `"%s"->"%x";`, id, rnd)
48 }
49
50 default:
51 fmt.Fprintf(buf, `"%s"[label="%s"];`, id, m.String())
52 }
53
54 return buf.String()
55 }
56
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