+FilterEmoji

utils/utils.go

@@ -225,6 +225,22 @@ func FilterMb4(content string) string {
 	return newContent.String()
 }
 
+// 是否是修饰符，比如控制EMOJI的颜色控制符，ZWJ
+func IsDecorateRune(value rune) bool {
+	return value == 0xFE0F || value == 0xFE0E || value == 0x200D
+}
+
+func FilterEmoji(content string) string {
+	newContent := &strings.Builder{}
+	for _, value := range []rune(content) {
+		size := utf8.RuneLen(value)
+		if size >= 1 && size <= 3 && !(value >= 0x2300 && value < 0x32A0 || value >= 0x1F000 && value < 0x1F9F0) && !IsDecorateRune(value) {
+			newContent.WriteRune(value)
+		}
+	}
+	return newContent.String()
+}
+
 func TrimBlankChar(str string) string {
 	return strings.Trim(str, "\n\r\t ")
 }

utils/utils_test.go

@@ -128,7 +128,7 @@ func BenchmarkFilterMb4(b *testing.B) {
 	}
 }
 
-func TestFilterMb4(t *testing.T) {
+func TestFilterEmoji(t *testing.T) {
 	for _, v := range [][]string{
 		[]string{
 			`
@@ -143,11 +143,11 @@ func TestFilterMb4(t *testing.T) {
 			"abcd中国人",
 		},
 		[]string{
-			"日配冷藏❄❄",
+			"a❄️日配冷藏❄❄🀄A❄️",
-			"日配冷藏❄❄",
+			"a日配冷藏A",
 		},
 	} {
-		str := FilterMb4(v[0])
+		str := FilterEmoji(v[0])
 		if str != v[1] {
 			t.Fatalf("%s failed\nshould be:%s\nbut it's:%s", v[0], v[1], str)
 		}