refactor: rule-set and its provider

rule/provider/ipcidr_strategy.go

@@ -0,0 +1,44 @@
+package provider
+
+import (
+	"github.com/Dreamacro/clash/component/trie"
+	C "github.com/Dreamacro/clash/constant"
+	"github.com/Dreamacro/clash/log"
+)
+
+type ipcidrStrategy struct {
+	count           int
+	shouldResolveIP bool
+	trie            *trie.IpCidrTrie
+}
+
+func (i *ipcidrStrategy) Match(metadata *C.Metadata) bool {
+	return i.trie != nil && i.trie.IsContain(metadata.DstIP)
+}
+
+func (i *ipcidrStrategy) Count() int {
+	return i.count
+}
+
+func (i *ipcidrStrategy) ShouldResolveIP() bool {
+	return i.shouldResolveIP
+}
+
+func (i *ipcidrStrategy) OnUpdate(rules []string) {
+	ipCidrTrie := trie.NewIpCidrTrie()
+	for _, rule := range rules {
+		err := ipCidrTrie.AddIpCidrForString(rule)
+		if err != nil {
+			log.Warnln("invalid Ipcidr:[%s]", rule)
+		} else {
+			i.count++
+		}
+	}
+
+	i.trie = ipCidrTrie
+	i.shouldResolveIP = i.count > 0
+}
+
+func NewIPCidrStrategy() *ipcidrStrategy {
+	return &ipcidrStrategy{}
+}