Add report cooldowns

This is to prevent report flooding/spamming.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/models.py

@@ -55,6 +55,9 @@ class Board(models.Model):
     # The amount of time that users from the same IP address are allowed to make
     # consecutive posts
     post_cooldown = models.DurationField(default=timedelta(seconds=60))
+    # The amount of time that users from the same IP address are allowed to make
+    # consecutive reports
+    report_cooldown = models.DurationField(default=timedelta(seconds=15))
     # Auto-sink threshhold. This is the number of replies that a thread can have
     # before it stops being bumped.
     autosink = models.IntegerField(default=300)
@@ -292,6 +295,8 @@ class Report(models.Model):
     reason = models.ForeignKey("ReportReason", on_delete=models.CASCADE)
     # IP address of the reporter
     ip = models.GenericIPAddressField()
+    # Time that this report was created
+    created = models.DateTimeField(auto_now_add=True)
 
 
 @receiver(signals.post_save, sender=Report)