基本逻辑完成

leaf/utils.go

@@ -0,0 +1,64 @@
+package leaf
+
+import (
+	"reflect"
+	"runtime"
+	"strings"
+)
+
+func assert1(guard bool, text string) {
+	if !guard {
+		panic(text)
+	}
+}
+
+func nameOfFunction(f any) string {
+	return runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
+}
+
+func match(route, topic string) bool {
+	return route == topic || routeIncludesTopic(route, topic)
+}
+
+func matchDeep(route []string, topic []string) bool {
+	if len(route) == 0 {
+		return len(topic) == 0
+	}
+
+	if len(topic) == 0 {
+		return route[0] == "#"
+	}
+
+	if route[0] == "#" {
+		return true
+	}
+
+	if (route[0] == "+") || (route[0] == topic[0]) {
+		return matchDeep(route[1:], topic[1:])
+	}
+	return false
+}
+
+func routeIncludesTopic(route, topic string) bool {
+	return matchDeep(routeSplit(route), topicSplit(topic))
+}
+
+func routeSplit(route string) []string {
+	if len(route) == 0 {
+		return nil
+	}
+	var result []string
+	if strings.HasPrefix(route, "$share") {
+		result = strings.Split(route, "/")[2:]
+	} else {
+		result = strings.Split(route, "/")
+	}
+	return result
+}
+
+func topicSplit(topic string) []string {
+	if len(topic) == 0 {
+		return nil
+	}
+	return strings.Split(topic, "/")
+}