| %hook CMessageMgr
- (void)onRevokeMsg:(CMessageWrap *)arg1 {
if (HZWechatConfig.preventRevoke) {
NSString *msgContent = arg1.m_nsContent;
NSString *(^parseParam)(NSString *, NSString *,NSString *) = ^NSString *(NSString *content, NSString *paramBegin,NSString *paramEnd) {
NSUInteger startIndex = [content rangeOfString:paramBegin].location + paramBegin.length;
NSUInteger endIndex = [content rangeOfString:paramEnd].location;
NSRange range = NSMakeRange(startIndex, endIndex - startIndex);
return [content substringWithRange:range];
};
NSString *session = parseParam(msgContent, @"<session>", @"</session>");
NSString *newmsgid = parseParam(msgContent, @"<newmsgid>", @"</newmsgid>");
NSString *fromUsrName = parseParam(msgContent, @"<![CDATA[", @"撤回了一条消息");
CMessageWrap *revokemsg = [self GetMsg:session n64SvrID:[newmsgid integerValue]];
CContactMgr *contactMgr = [[objc_getClass("MMServiceCenter") defaultCenter] getService:objc_getClass("CContactMgr")];
CContact *selfContact = [contactMgr getSelfContact];
NSString *newMsgContent = @"";
if ([revokemsg.m_nsFromUsr isEqualToString:selfContact.m_nsUsrName]) {
if (revokemsg.m_uiMessageType == 1) { // 判断是否为文本消息
newMsgContent = [NSString stringWithFormat:@"拦截到你撤回了一条消息：\n %@",revokemsg.m_nsContent];
} else {
newMsgContent = @"拦截到你撤回一条消息";
}
} else {
if (revokemsg.m_uiMessageType == 1) {
newMsgContent = [NSString stringWithFormat:@"拦截到一条 %@撤回消息：\n %@",fromUsrName, revokemsg.m_nsContent];
} else {
newMsgContent = [NSString stringWithFormat:@"拦截到一条 %@撤回消息",fromUsrName];
}
}
CMessageWrap *newWrap = ({
CMessageWrap *msg = [[%c(CMessageWrap) alloc] initWithMsgType:0x2710];
[msg setM_nsFromUsr:revokemsg.m_nsFromUsr];
[msg setM_nsToUsr:revokemsg.m_nsToUsr];
[msg setM_uiStatus:0x4];
[msg setM_nsContent:newMsgContent];
[msg setM_uiCreateTime:[arg1 m_uiCreateTime]];
msg;
});
[self AddLocalMsg:session MsgWrap:newWrap fixTime:0x1 NewMsgArriveNotify:0x0];
return;
}
%orig;
}
%end
| 
