1 package pat
2
3 import (
4 "context"
5 "sort"
6
7 "goji.io/internal"
8 "goji.io/pattern"
9 )
10
11 type match struct {
12 context.Context
13 pat *Pattern
14 matches []string
15 }
16
17 func (m match) Value(key interface{}) interface{} {
18 switch key {
19 case pattern.AllVariables:
20 var vs map[pattern.Variable]interface{}
21 if vsi := m.Context.Value(key); vsi == nil {
22 if len(m.pat.pats) == 0 {
23 return nil
24 }
25 vs = make(map[pattern.Variable]interface{}, len(m.matches))
26 } else {
27 vs = vsi.(map[pattern.Variable]interface{})
28 }
29
30 for _, p := range m.pat.pats {
31 vs[p.name] = m.matches[p.idx]
32 }
33 return vs
34 case internal.Path:
35 if len(m.matches) == len(m.pat.pats)+1 {
36 return m.matches[len(m.matches)-1]
37 }
38 return ""
39 }
40
41 if k, ok := key.(pattern.Variable); ok {
42 i := sort.Search(len(m.pat.pats), func(i int) bool {
43 return m.pat.pats[i].name >= k
44 })
45 if i < len(m.pat.pats) && m.pat.pats[i].name == k {
46 return m.matches[m.pat.pats[i].idx]
47 }
48 }
49
50 return m.Context.Value(key)
51 }
52
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