var waitTime = 7; // In seconds
var group = 343476; // 0 for no group check, otherwise people in this group will not receive the message
function sendMsg(userId, username) {
    function send() {
        $.post('//www.roblox.com/messages/send',{
            subject: "Greetings, I am inviting you to Forge Empire",
            body: "Hi, I am inviting you to a skilled clan that is launching next weekend and we are looking for the best people we can get. If you're interested then here's the link and check the group shout for the discord link. https://www.roblox.com/My/Groups.aspx?gid=343476",
            recipientid: userId,
            cacheBuster: new Date().getTime()
        }).done(function(response) {
            if (response.success == true) {
                console.log('Sent message to ' + username + ' (' + userId + ')');
            } else {
                console.log('Error sending to ' + username + ': ' + response.shortMessage);
            }
        });
    }
    if (group > 0) {
        $.get('//www.roblox.com/Game/LuaWebService/HandleSocialRequest.ashx?method=IsInGroup&playerid=' + userId + '&groupid=' + group, function(response) {
            if(response.indexOf('true') == -1) {
                send();
            } else {
                console.log('Didn\'t send a message to ' + username + ' because he is already in group ' + group + '.');
            }
        });
    } else {
        send();
    }
}

function run() {
    var timeout = 0;
    var elements = document.evaluate('//div[contains(@id,\'ctl00_cphRoblox_rbxGroupRoleSetMembersPane_GroupMembersUpdatePanel\')]//div[contains(@class,\'GroupMember\')]//span[contains(@class,\'Name\')]/a',document,null,XPathResult.UNORDERED_NODE_ITERATOR_TYPE,null);
    var currentNode = elements.iterateNext();
    while (currentNode) {
        (function(time,id,name) {
            setTimeout(sendMsg,time,id,name);
        })(timeout,currentNode.href.match(/\d+/)[0],currentNode.textContent);
        timeout+=waitTime*1000;
        currentNode = elements.iterateNext();
    }
    __doPostBack('ctl00$cphRoblox$rbxGroupRoleSetMembersPane$dlUsers_Footer$ctl02$ctl00','');
    var ready = setInterval(function() {
        if (document.getElementById('__EVENTTARGET').value == '') {
            clearInterval(ready);
            setTimeout(run,timeout);
        }
    }, 10);
}
var ready = setInterval(function() {
    if (document.readyState === 'complete') {
        clearInterval(ready);
        run();
    }
}, 10);