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hook.go
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hook.go
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package hook
import (
"sort"
"github.com/webx-top/echo"
)
type (
Hook func(echo.H) error
Hooks map[string][]Hook
)
func New() Hooks {
return Hooks{}
}
func (h Hooks) On(ev string, fn Hook) {
if _, ok := h[ev]; !ok {
h[ev] = []Hook{}
}
h[ev] = append(h[ev], fn)
}
func (h Hooks) Size(ev string) int {
if _, ok := h[ev]; !ok {
return 0
}
return len(h[ev])
}
func (h Hooks) Names() []string {
names := make([]string, len(h))
var i int
for name := range h {
names[i] = name
i++
}
sort.Strings(names)
return names
}
func (h Hooks) Off(ev string) {
if _, ok := h[ev]; !ok {
return
}
delete(h, ev)
}
func (h Hooks) Fire(ev string, data echo.H) error {
if _, ok := h[ev]; !ok {
return nil
}
var err error
for _, hook := range h[ev] {
if err = hook(data); err != nil {
return err
}
}
return err
}