Add usage limit based on IP

controllers/new.go

@@ -31,6 +31,12 @@ func PostNewHandler(c echo.Context) error {
 	lang := c.FormValue("lang")
 	ip := c.RealIP()
 
+	if tooMany, period := ipHasTooManyUses(ip); tooMany {
+		return utils.RenderErrorToast(c,
+			fmt.Sprintf("This IP address has uploaded too many files in the %s", period),
+		)
+	}
+
 	if (file == nil || err != nil) && text == "" {
 		return utils.RenderErrorToast(c, "file or text must be provided")
 	}
@@ -98,3 +104,39 @@ func getTextFromFile(fileHeader *multipart.FileHeader) (text string, err error)
 	text = string(b)
 	return
 }
+
+func ipHasTooManyUses(ip string) (tooMany bool, period string) {
+	file := new(models.File)
+	var dayCount int64
+	global.DB.Model(file).
+		Where("ip = ? AND created_date >= DATETIME('now', '-1 day')", ip).
+		Count(&dayCount)
+
+	var threeDayCount int64
+	global.DB.Model(file).
+		Where("ip = ? AND created_date >= DATETIME('now', '-3 days')", ip).
+		Count(&threeDayCount)
+
+	var weekCount int64
+	global.DB.Model(file).
+		Where("ip = ? AND created_date >= DATETIME('now', '-7 days')", ip).
+		Count(&weekCount)
+
+	var monthCount int64
+	global.DB.Model(file).
+		Where("ip = ? AND created_date >= DATETIME('now', '-1 month')", ip).
+		Count(&monthCount)
+
+	if dayCount > 20 {
+		return true, "last day"
+	} else if threeDayCount > 50 {
+		return true, "last three days"
+	} else if weekCount > 85 {
+		return true, "last week"
+	} else if monthCount > 300 {
+		return true, "last month"
+	}
+
+	return false, ""
+
+}