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fd.showLoading();
ExecuteOrDelayUntilScriptLoaded(IsCurrentUserWithContributePerms, 'SP.js');

//function that implements the redirect logic 
function IsCurrentUserWithContributePerms() 
{
  //specify the name of the group here instead of “Members”
  IsCurrentUserMemberOfGroup("Members", function (isCurrentUserInGroup) {
    //if the user is definitely in the group
    if(isCurrentUserInGroup){
        // then redirect the user somewhere. Replace this filename with the filename of your form to which a member is to be redirected (see the screenshot above)
        fd.openForm('fd_Item_767bfb1a-7093-46f0-be37-1cf85c917a63_EditForm.aspx');
    }
    //here you will have as many if statements as you have user roles
    else {
        //here is the default choice for users that don’t belong to any groups: 
        //maybe redirect him/her someplace else - use fd.openForm(..) like above
        //or remain on the current page (and show it):
        fd.hideLoading();
    }
  });

}

//function to check if a user belongs to a group  (no need to worry about this)
function IsCurrentUserMemberOfGroup(groupName, OnComplete) {

        var context = new SP.ClientContext.get_current();
        var currentWeb = context.get_web();

        var currentUser = context.get_web().get_currentUser();
        context.load(currentUser);

        var allGroups = currentWeb.get_siteGroups();
        context.load(allGroups);

        var group = allGroups.getByName(groupName);
        context.load(group);
        
        var groupUsers = group.get_users();
        context.load(groupUsers);

        context.executeQueryAsync(
                function(sender, args) {
                   var userInGroup = IsUserInGroup(currentUser,group);         
                   OnComplete(userInGroup);
                },
                function OnFailure(sender, args) {
                   OnComplete(false);
                }
        );
        
        function IsUserInGroup(user,group)
        {
            var groupUsers = group.get_users();
            var userInGroup = false;
            var groupUserEnumerator = groupUsers.getEnumerator();
            while (groupUserEnumerator.moveNext()) {
                var groupUser = groupUserEnumerator.get_current();
                if (groupUser.get_id() == user.get_id()) {
                    userInGroup = true;
                    break;
                }
            }
            return userInGroup;
        }
}