/
nkn_filter.go
80 lines (69 loc) · 1.19 KB
/
nkn_filter.go
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package filter
import (
"log"
)
type NknClient struct {
Address string `json:"address"`
Metadata string `json:"metadata"`
}
var emptyNknClient = NknClient{}
func (c *NknClient) Empty() bool {
if c == nil {
return true
}
return *c == emptyNknClient
}
func (c *NknClient) Match(nknClient *NknClient) bool {
if len(c.Address) > 0 {
if nknClient.Address == c.Address {
return true
}
return false
}
return false
}
type NknFilter struct {
Allow []NknClient `json:"allow"`
Disallow []NknClient `json:"disallow"`
}
func (f *NknFilter) Empty() bool {
if f == nil {
return true
}
for _, a := range f.Allow {
if !a.Empty() {
return false
}
}
for _, d := range f.Disallow {
if !d.Empty() {
return false
}
}
return true
}
func (f *NknFilter) IsAllow(nknClient *NknClient) bool {
if f == nil {
return true
}
if nknClient.Empty() {
return true
}
for _, d := range f.Disallow {
if d.Match(nknClient) {
log.Printf("%s dropped", nknClient.Address)
return false
}
}
empty := true
for _, a := range f.Allow {
if a.Match(nknClient) {
log.Printf("%s passed", nknClient.Address)
return true
}
if !a.Empty() {
empty = false
}
}
return empty
}