feat(crypter): 添加qq表情加密并支持回应密文 (#1287)

plugin/crypter/qqemoji.go

@@ -0,0 +1,66 @@
+// Package crypter QQ表情加解密
+package crypter
+
+import (
+	"fmt"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/wdvxdr1123/ZeroBot/message"
+)
+
+const (
+	emojiZeroID = 297
+	emojiOneID  = 424
+)
+
+func encodeQQEmoji(text string) message.Message {
+	if text == "" {
+		return message.Message{message.Text("请输入要加密的文本")}
+	}
+
+	var bin strings.Builder
+	for _, b := range []byte(text) {
+		fmt.Fprintf(&bin, "%08b", b)
+	}
+
+	s := bin.String()
+	msg := make(message.Message, 0, len(s))
+	for _, bit := range s {
+		if bit == '0' {
+			msg = append(msg, message.Face(emojiZeroID))
+		} else {
+			msg = append(msg, message.Face(emojiOneID))
+		}
+	}
+	return msg
+}
+
+func decodeQQEmoji(faceIDs []int) string {
+	var bin strings.Builder
+	for _, id := range faceIDs {
+		if id == emojiZeroID {
+			bin.WriteByte('0')
+		} else if id == emojiOneID {
+			bin.WriteByte('1')
+		}
+	}
+	binary := bin.String()
+	if len(binary) == 0 || len(binary)%8 != 0 {
+		return "QQ表情密文格式错误"
+	}
+
+	data := make([]byte, len(binary)/8)
+	for i := range data {
+		for j := 0; j < 8; j++ {
+			if binary[i*8+j] == '1' {
+				data[i] |= 1 << (7 - j)
+			}
+		}
+	}
+
+	if !utf8.Valid(data) {
+		return "QQ表情解密失败：结果不是有效文本"
+	}
+	return string(data)
+}