Normalize trunk filtering

.changeset/late-rats-cheat.md

@@ -0,0 +1,5 @@
+---
+"github.com/livekit/protocol": patch
+---
+
+Updating how ListSIPInboundTrunkRequest filtering occurs by normalising phone number that are being compared

livekit/sip.go

@@ -725,6 +725,16 @@ func (p *ListSIPInboundTrunkRequest) Filter(info *SIPInboundTrunkInfo) bool {
 				ok = true
 				break
 			}
+			normalizedNum := NormalizeNumber(num)
+			for _, reqNum := range p.Numbers {
+				if NormalizeNumber(reqNum) == normalizedNum {
+					ok = true
+					break
+				}
+			}
+			if ok {
+				break
+			}
 		}
 		if !ok {
 			return false
@@ -797,3 +807,30 @@ func (p *ListSIPDispatchRuleRequest) FilterSlice(arr []*SIPDispatchRuleInfo) []*
 	})
 	return filterSlice(arr, p.Filter)
 }
+
+// NormalizeNumber normalizes a phone number by removing formatting characters and ensuring it starts with a "+".
+// If the input is empty, it returns an empty string.
+// If the input doesn't match the expected number pattern, it returns the original input unchanged.
+func NormalizeNumber(num string) string {
+	if num == "" {
+		return ""
+	}
+	if !reNumber.MatchString(num) {
+		return num
+	}
+	num = reNumberRepl.Replace(num)
+	if !strings.HasPrefix(num, "+") {
+		return "+" + num
+	}
+	return num
+}
+
+var (
+	reNumber     = regexp.MustCompile(`^\+?[\d\- ()]+$`)
+	reNumberRepl = strings.NewReplacer(
+		" ", "",
+		"-", "",
+		"(", "",
+		")", "",
+	)
+)

sip/sip.go

@@ -22,7 +22,6 @@ import (
 	"maps"
 	"math"
 	"net/netip"
-	"regexp"
 	"sort"
 	"strings"
 
@@ -275,28 +274,10 @@ func printNumbers(numbers []string) string {
 	return fmt.Sprintf("%q", numbers)
 }
 
-var (
-	reNumber     = regexp.MustCompile(`^\+?[\d\- ()]+$`)
-	reNumberRepl = strings.NewReplacer(
-		" ", "",
-		"-", "",
-		"(", "",
-		")", "",
-	)
-)
-
+// NormalizeNumber normalizes a phone number by removing formatting characters and ensuring it starts with a "+".
+// This function delegates to livekit.NormalizeNumber for the actual implementation.
 func NormalizeNumber(num string) string {
-	if num == "" {
-		return ""
-	}
-	if !reNumber.MatchString(num) {
-		return num
-	}
-	num = reNumberRepl.Replace(num)
-	if !strings.HasPrefix(num, "+") {
-		return "+" + num
-	}
-	return num
+	return livekit.NormalizeNumber(num)
 }
 
 func validateTrunkInbound(byInbound map[string]*livekit.SIPInboundTrunkInfo, t *livekit.SIPInboundTrunkInfo, opt *matchTrunkOpts) error {