// delRule delete a rule from the suffix tree
func (f *Filter) delRule(rule *models.Rule) {
l := strings.Split(rule.Pattern, ".")
if !f.children.Has(l[0]) {
return
}
v, _ := f.children.Get(l[0])
ch := v.(*childFilter)
l = l[1:]
for len(l) > 0 {
if ch.children == nil {
return
}
if ch.children.Has(l[0]) {
v, _ = ch.children.Get(l[0])
ch = v.(*childFilter)
} else {
return
}
l = l[1:]
}
ch.lock.Lock()
defer ch.lock.Unlock()
rules := []*models.Rule{}
for _, r := range v.(*childFilter).matchedRules {
if !rule.Equal(r) {
rules = append(rules, r)
}
}
ch.matchedRules = rules
}
// Put a rule into cache.
func (c *rulesCache) Put(rule *models.Rule) bool {
if c.rules.Has(rule.ID) {
return false
}
r := rule.Copy()
r.Share()
c.rules.Set(rule.ID, r)
c.pushAdded(rule)
return true
}