// check if a given user has used his global daily posting quota
public static bool UserDailyGlobalPostingQuotaUsed(string userName)
{
// only execute this check if user account is less than a month old and user SCP is less than 50 and user is not posting to a sub they own/moderate
DateTime userRegistrationDateTime = GetUserRegistrationDateTime(userName);
int memberInDays = (DateTime.Now - userRegistrationDateTime).Days;
int userScp = Karma.LinkKarma(userName);
if (memberInDays > 30 && userScp >= 50)
{
return(false);
}
// set starting date to 24 hours ago from now
var fromDate = DateTime.Now.Add(new TimeSpan(0, -24, 0, 0, 0));
var toDate = DateTime.Now;
// read daily global posting quota configuration parameter from web.config
int dpqps = Settings.DailyGlobalPostingQuota;
using (var db = new voatEntities())
{
// check how many submission user made today
var userSubmissionsToTargetSub = db.Submissions.Count(m => m.UserName.Equals(userName, StringComparison.OrdinalIgnoreCase) && m.CreationDate >= fromDate && m.CreationDate <= toDate);
if (dpqps <= userSubmissionsToTargetSub)
{
return(true);
}
return(false);
}
}
// various spam checks, to be replaced with new rule engine
public static async Task <string> PreAddSubmissionCheck(Submission submissionModel, HttpRequestBase request, string userName, Subverse targetSubverse, Func <HttpRequestBase, Task <bool> > captchaValidator)
{
// TODO: reject if a submission with this title was posted in the last 60 minutes
// check posting quotas if user is posting to subs they do not moderate
if (!UserHelper.IsUserSubverseModerator(userName, submissionModel.Subverse))
{
// reject if user has reached global daily submission quota
if (UserHelper.UserDailyGlobalPostingQuotaUsed(userName))
{
return("You have reached your daily global submission quota.");
}
// reject if user has reached global hourly submission quota
if (UserHelper.UserHourlyGlobalPostingQuotaUsed(userName))
{
return("You have reached your hourly global submission quota.");
}
// check if user has reached hourly posting quota for target subverse
if (UserHelper.UserHourlyPostingQuotaForSubUsed(userName, submissionModel.Subverse))
{
return("You have reached your hourly submission quota for this subverse.");
}
// check if user has reached daily posting quota for target subverse
if (UserHelper.UserDailyPostingQuotaForSubUsed(userName, submissionModel.Subverse))
{
return("You have reached your daily submission quota for this subverse.");
}
}
// verify recaptcha if user has less than 25 CCP
var userCcp = Karma.CommentKarma(userName);
if (userCcp < 25)
{
bool isCaptchaCodeValid = await captchaValidator(request);
if (!isCaptchaCodeValid)
{
// TODO: SET PREVENT SPAM DELAY TO 0
return("Incorrect recaptcha answer.");
}
}
// if user CCP or SCP is less than -10, allow only X submissions per 24 hours
var userScp = Karma.LinkKarma(userName);
if (userCcp <= -10 || userScp <= -10)
{
var quotaUsed = UserHelper.UserDailyPostingQuotaForNegativeScoreUsed(userName);
if (quotaUsed)
{
return("You have reached your daily submission quota. Your current quota is " + Settings.DailyPostingQuotaForNegativeScore + " submission(s) per 24 hours.");
}
}
// check if subverse has "authorized_submitters_only" set and dissalow submission if user is not allowed submitter
if (targetSubverse.IsAuthorizedOnly)
{
if (!UserHelper.IsUserSubverseModerator(userName, targetSubverse.Name))
{
return("You are not authorized to submit links or start discussions in this subverse. Please contact subverse moderators for authorization.");
}
}
// null is returned if all checks have passed
return(null);
}